Coffee machine grinder capable of uniformly distributing powder

Abstract

The invention relates to a coffee machine grinder capable of uniformly distributing powder, and aims to solve the technical problems that a powder feeding channel of an existing similar product is easy to block, the powder distribution effect is poor, nonuniformity and residues are generated, and a bean box is placed in place, and a detection trigger structure is complex in design. The coffee machine grinder is characterized in that powder distribution fan blades are arranged in a powder outlet channel at a grinding knife assembly of the coffee machine grinder, a powder screening net is arranged at a bottom channel opening of the powder outlet channel, the powder screening net is fixed to the bottom channel opening of the powder outlet channel through a powder outlet cover in an internal and external thread mode, and a motor shaft of a powder distribution motor extends into the powder outlet channel to be connected with the powder distribution fan blades. A notch is formed in one side of the spiral blade of the powder distribution fan blade, and a top channel opening of the powder outlet channel on one side of the sharpening assembly is exposed out of the machine body; self-locking protruding tongue assemblies are symmetrically arranged on the inner walls of the two sides of the inner bottom of the bean box tray, switch ejector rod assemblies are symmetrically arranged on at least one side of the outer diameter of the bean box tray, and the other switch ejector rod assembly is arranged on one side of the sleeving position of a bean feeding opening of the bean box tray and a knife edge of the knife sharpening assembly.

Description

Technical Field

[0001] The invention relates to a coffee machine grinder with a bean box, which is a coffee machine grinder with uniform powder distribution. Background Art

[0002] A coffee machine is an electrical device used for making coffee. It is generally divided into semi-automatic and fully automatic types. A semi-automatic coffee machine is a traditional Italian coffee machine that performs manual operations such as grinding, pressing, loading, brewing, and manually removing residues. A fully automatic coffee machine automatically controls the entire process of brewing coffee, including preheating, cleaning, grinding, pressing, brewing, and draining. It brews coffee according to scientific data and procedures, and is equipped with a complete protection system. It is easy to use and you can get coffee with just one click. At present, during the grinding process of a common fully automatic coffee machine, when the powder enters the lower brewing core, the powder distribution will be uneven due to the deviation of the design angle, and there will be residual powder in the lower powder channel, which will cause problems such as insufficient brewing extraction and affect the taste of the coffee. For this reason, some existing coffee machines are equipped with a powder distribution structure, such as the application number 202211337262.8 disclosed in the Chinese patent literature, the application publication date 2023.01.10, and the invention name "coffee powder distribution assembly, coffee powder distributor and coffee machine"; the above-mentioned powder distribution structure is mainly designed at the funnel, and is not set in the powder drop channel of the grinder. Another example is the application number 202411325610.9 disclosed in the Chinese patent literature, the application publication date 2024.11.26, and the invention name "a coffee machine bean box lower bean grinding mechanism"; this mechanism detects the bean box assembly into the bean box base assembly through a micro switch, but the bone position triggering method has poor stability and is prone to risks such as breakage. The production mold is more complicated and inconvenient, and it is more difficult to repair and replace. Summary of the invention

[0003] In order to overcome the above shortcomings, the purpose of the present invention is to provide a coffee machine grinder with uniform powder distribution in the art, so as to solve the technical problems of the existing similar products, such as the powder channel is easy to be blocked, the powder distribution effect is poor, uneven and residual powder is generated, and the bean box is placed in place. The detection trigger structure design is complicated. The purpose is achieved through the following technical solutions.

[0004] A coffee machine grinder for evenly distributing powder, the coffee machine grinder comprises a bean box assembly and a bean grinding assembly, the bean grinding assembly comprises a weighing assembly and a knife grinding assembly, the weighing assembly serves as a bean box base assembly, a lower bean opening protruding from the bottom of the weighing assembly fits with a knife edge protruding from the top of the knife grinding assembly, a lower bean opening in a plate groove at the top of a bean box tray of the weighing assembly is aligned with a bean inlet of the bean box assembly, a motor shaft at a grinding motor of the knife grinding assembly is connected to a grinding knife head assembly in a grinding chamber, the weighing assembly and the knife grinding assembly are fixedly arranged on a machine body, a plate opening at the bean box tray on the top of the weighing assembly is exposed from the machine body, and a powder outlet channel communicating with the grinding chamber in the knife grinding assembly is provided on one side of the knife grinding assembly. The key points of its structural design are that the powder outlet channel of the knife grinder assembly is provided with a powder distribution fan blade, the bottom channel opening of the powder outlet channel is provided with a powder screening net, the powder screening net is fixed to the bottom channel opening of the powder outlet channel through the inner and outer threads of the powder outlet cover, the motor shaft of the powder distribution motor extends into the powder outlet channel and is connected with the powder distribution fan blade; the top channel opening of the powder outlet channel on one side of the knife grinder assembly may be exposed from the machine body. Therefore, the coffee powder ground by the existing coffee machine without a powder distribution mechanism falls forward when entering the brewing chamber, which is prone to uneven accumulation and affects the brewing taste; the coffee powder ground by the grinder with a powder distribution mechanism evenly enters the brewing chamber and is evenly accumulated after being evenly distributed by the powder distribution mechanism.

[0005] A notch is provided on one side of the spiral blade of the powder distribution fan blade, and the notch is 50°-60°. The height difference between the upper and lower ends of the spiral blade of the powder distribution fan blade is 6mm-7mm. The above structure further improves its anti-blocking and anti-residue and uniform powder distribution effects.

[0006] The inner walls on both sides of the bottom of the bean box tray are symmetrically provided with self-locking tongue assemblies, and at least one side of the outer diameter of the bean box tray is symmetrically provided with a switch top rod assembly; when the bean box assembly is placed in the top tray slot of the bean box tray, the convex point at the bone position of the bottom of the bean box assembly triggers the micro switch of the switch top rod assembly, and at the same time, the rib position in the buckle slot at the bottom of the bean box assembly is limited and buckled with the self-locking tongue of the self-locking tongue assembly. Therefore, during the placement of the bean box assembly, the self-locking tongue assembly is locked in place and the micro switch is triggered by the switch top rod assembly, and the program confirms that the bean box assembly is installed in place and enters the working state.

[0007] The self-locking tongue assembly comprises a tongue fixing cavity, a tongue spring and a bean box self-locking tongue. The bean box self-locking tongue in the tongue fixing cavity extends out of a hole on one side of the tongue fixing cavity and a hole on one side of the convex position of the inner wall of the top groove of the bean box tray through the tongue spring in the tongue fixing cavity. The hole on this side of the tongue fixing cavity is buckled and fixed to the outer groove at the convex position of the bean box tray. When the bean box assembly is placed in the top groove of the bean box tray, the rib position in the buckle groove at the bottom of the bean box assembly is limitedly buckled and fixed to the tongue fixing cavity extending out of the self-locking tongue assembly and the self-locking tongue on the inner wall of the top groove of the bean box tray.

[0008] The switch top rod assembly comprises a micro switch top rod, a top rod spring, a pan head screw, a micro switch, a top rod bracket and a bracket screw. The micro switch is fixed in a switch slot on one side of the outer diameter of the bean box tray by a pan head screw. A moving reed on one side of the micro switch extends out of the switch slot and is aligned with a contact at one end of the switch top rod. The convex portion on the other side of the contact is inserted into a side groove which is convex on the inner wall of the top groove of the bean box tray and has an opening at the top. The other end of the switch top rod is inserted into a top rod bracket which is fixed and provided with a top rod spring on the outer diameter. The top rod bracket is arranged on the outer diameter of the bean box tray on one side of the micro switch by a bracket screw. When the bean box assembly is placed in the top groove of the bean box tray, a convex point at the bone position at the bottom of the bean box assembly presses down on the convex portion of the top rod. The downward movement of the top rod drives the contact to press down on the moving reed of the micro switch opening, thereby triggering the micro switch of the switch top rod assembly.

[0009] Another switch top rod assembly is arranged on one side of the bean box tray bottom protrusion where the lower bean opening and the top protrusion of the sharpening assembly fit together, at the bottom of the bean box tray or at one side of the outer diameter of the sharpening assembly.

[0010] The rear powder outlet channel cover at the powder outlet channel on one side of the knife sharpening assembly is integrally formed with the outer shell of the knife sharpening assembly, and the front powder outlet channel cover is buckled and fixed to the opening at the rear powder outlet channel cover. The above structure facilitates the assembly and maintenance of the powder distribution fan blade and the powder distribution motor.

[0011] A motor bracket fixing plate is provided at the bottom of the bean box tray, and a lower bean gear motor is provided at the bottom of the motor bracket fixing plate. The motor shaft of the lower bean gear motor passes through the motor bracket fixing plate and is connected with the transmission gear. The transmission gear passes through the bean box tray and is sleeved and connected with the gear hole of the lower bean gear exposed at the bottom of the bean box assembly placed in the disc slot at the top of the bean box tray. The lower bean gear motor is arranged at the bottom of the motor bracket fixing plate through a motor bracket.

[0012] A weighing module is provided on one side of the bottom of the motor bracket fixing plate, and the weighing module includes a weighing sensor and a weighing module fixing seat. The weighing support of the weighing sensor is attached to the bottom of the motor bracket fixing plate through a sensor bridge arm. The weighing sensor of the weighing module is limited to a gap in the weighing fixing seat and swings up and down and left and right. The weighing module is arranged at the bottom of the motor support seat of the motor bracket fixing plate.

[0013] An adjusting disk motor is provided on the other side of the bottom of the motor bracket fixing plate. The motor shaft of the adjusting disk motor is meshed with the cutter disc adjusting gear of the outer diameter of the grinding cutter head assembly through the adjusting gear. The rotation of the cutter disc adjusting gear drives the movable cutter sleeve in the grinding cutter head assembly to rotate, and the gap between the movable cutter sleeve in the grinding cutter head assembly and the stationary cutter head in the grinding cutter head assembly changes. The adjusting disk motor is fixedly arranged on the motor bracket of the motor bracket fixing plate or on one side of the outer shell of the grinding cutter assembly.

[0014] The invention has reasonable structural design, convenient production and assembly, convenient disassembly, easy cleaning, good stability and long service life. In particular, the powder is evenly distributed in the powder outlet channel and is not easy to produce residue. The bean box assembly is easy to place, accurately detected and firmly placed. The invention is suitable for use as a coffee machine grinder for evenly distributing powder, and is a structural improvement of similar products. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0016] Figure 2 yes Figure 1 Schematic diagram of the exploded structure of the sharpening component.

[0017] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the weighing component.

[0018] Figure 4 yes Figure 1 A schematic cross-sectional view of the self-locking tongue assembly is shown in FIG. 1 , in which part A is framed and the dotted line represents the outline of the entire machine.

[0019] Figure 5 yes Figure 4 Enlarged view of part A.

[0020] Figure 6 yes Figure 1 The schematic diagram of the cross-sectional structure of the switch push rod assembly is shown in FIG. 1 , in which part B is framed.

[0021] Figure 7 yes Figure 6 Enlarged view of part B.

[0022] Figure 8 yes Figure 1 Schematic diagram of the bottom three-dimensional structure.

[0023] Fig. 9 yes Figure 8 A schematic diagram of part of the internal structure of the invention omits the bottom cover of the gear box at the grinding motor and the motor bracket at the bottom of the motor bracket fixing plate.

[0024] Fig.10 yes Figure 1 Schematic diagram of the internal structure of the bean box tray after the bean box assembly is removed.

[0025] Fig.11 yes Figure 1 Schematic diagram of the bottom structure of the three main components in the exploded state.

[0026] Fig.12 yes Figure 1 Schematic diagram of the enlarged structure of the powder-distributing fan blades.

[0027] Fig.13 yes Fig.12 Schematic diagram of the top view structure.

[0028] Fig.14 yes Fig.12 Schematic diagram of the structure from the side at the notch.

[0029] Serial number and name of the attached drawings: 1, bean box assembly, 2, bean grinding assembly, 3, powder distribution motor, 4, rear powder outlet channel cover, 5, front powder outlet channel cover, 6, powder distribution fan blade, 601, notch, 7, powder sifting net, 8, powder outlet cover, 9, powder distribution motor fixing screw, 10, left tongue fixing cavity, 11, left tongue spring, 12, left bean box self-locking tongue, 13, right bean box self-locking tongue, 14, right tongue spring, 15, right tongue fixing cavity, 16, left micro switch push rod, 17, left push rod spring, 18, left pan head screw 1. Thread, 19. Left micro switch, 20. Right push rod spring, 21. Right pan head screw, 22. Right micro switch push rod, 23. Right micro switch, 24. Left bracket screw, 25. Left push rod bracket, 26. Right bracket screw, 27. Right push rod bracket, 28. Weighing assembly, 29. Bean box tray, 30. Transmission gear, 31. Motor bracket fixing plate, 32. Weighing module, 33. Grinding motor, 34. Adjustment disk motor, 35. Adjustment gear, 36. Lower bean gear motor, 37. Knife disc adjustment gear. Implementation

[0030] Now, the structure and use of the present invention will be further described in conjunction with the accompanying drawings. Figure 1-Figure 14As shown, the coffee machine grinder includes a bean box assembly 1 and a bean grinding assembly 2, wherein the bean grinding assembly includes a weighing assembly 28 and a knife grinding assembly, wherein the weighing assembly serves as a bean box base assembly, a lower bean opening protruding from the bottom of the weighing assembly fits with a knife edge protruding from the top of the knife grinding assembly, a lower bean opening in a plate groove at the top of a bean box tray 29 of the weighing assembly is aligned with a bean inlet of the bean box assembly, a motor shaft at a grinding motor 33 of the knife grinding assembly is connected to a grinding knife head assembly in a grinding chamber, the weighing assembly and the knife grinding assembly are fixedly arranged on a machine body, a plate opening at the bean box tray on the top of the weighing assembly is exposed from the machine body, and a powder outlet channel communicating with the grinding chamber in the knife grinding assembly is provided on one side of the knife grinding assembly. The powder outlet channel of the knife grinding component is provided with a powder distribution fan blade 6, and the bottom channel opening of the powder outlet channel is provided with a powder screening net 7. The powder screening net is fixed to the bottom channel opening of the powder outlet channel through the powder outlet cover 8 with internal and external threads. The motor shaft of the powder distribution motor 3 extends into the powder outlet channel and is connected with the powder distribution fan blade. The powder distribution motor is fixed to the outer shell of the knife grinding component of the bean grinding component through the powder distribution motor fixing screw 9 or a buckle; the top channel opening of the powder outlet channel on one side of the knife grinding component may be exposed to the machine body, and the top channel opening of the powder outlet channel is flush with the plate opening of the bean box tray and exposed to the machine body. A notch 601 is provided on one side of the spiral blade of the powder distribution fan blade, and the notch is 52.43°. The height difference between the upper and lower ends of the spiral blade of the powder distribution fan blade is 6.52mm. The rear powder outlet channel cover 4 at the powder outlet channel on one side of the knife grinding component is integrally formed with the outer shell of the knife grinding component, and the front powder outlet channel cover 5 is buckled and fixed to the opening of the rear powder outlet channel cover.

[0031] The inner walls on both sides of the bottom of the bean box tray described above are symmetrically provided with self-locking tongue assemblies, and at least one side of the outer diameter of the bean box tray is symmetrically provided with a switch top rod assembly; when the bean box assembly is placed in the top tray groove of the bean box tray, the convex point at the bone position at the bottom of the bean box assembly triggers the micro switch of the switch top rod assembly, and at the same time, the rib position in the buckle groove at the bottom of the bean box assembly is limitedly buckled and fixed to the self-locking tongue of the self-locking tongue assembly. Specifically: the self-locking tongue assembly includes a tongue fixing cavity, a tongue spring and a bean box self-locking tongue. The bean box self-locking tongue in the tongue fixing cavity extends out of a hole on one side of the tongue fixing cavity and a hole on one side of the convex position of the inner wall of the top groove of the bean box tray through the tongue spring in the tongue fixing cavity. The hole on this side of the tongue fixing cavity is snapped and fixed to the outer groove at the convex position of the bean box tray. When the bean box assembly is placed in the top groove of the bean box tray, the rib position in the buckle groove at the bottom of the bean box assembly is limitedly snapped and fixed to the tongue fixing cavity extending out of the self-locking tongue assembly and the self-locking tongue on the inner wall of the top groove of the bean box tray. The switch top rod assembly comprises a micro switch top rod, a top rod spring, a pan head screw, a micro switch, a top rod bracket and a bracket screw. The micro switch is fixed in a switch slot on one side of the outer diameter of the bean box tray by a pan head screw. A moving reed on one side of the micro switch extends out of the switch slot and is aligned with a contact at one end of the switch top rod. A convex portion on the other side of the contact is inserted into a side groove which is convex on the inner wall of the top groove of the bean box tray and has an opening at the top. The other end of the switch top rod is inserted into a top rod bracket which is fixed and provided with a top rod spring on the outer diameter. The top rod bracket is arranged on the outer diameter of the bean box tray on one side of the micro switch by a bracket screw. When the bean box assembly is placed in the top groove of the bean box tray, a convex point at the bone position at the bottom of the bean box assembly presses down on the convex portion of the top rod. The downward movement of the top rod drives the contact to press down on the moving reed of the micro switch opening, thereby triggering the micro switch of the switch top rod assembly.

[0032] The left self-locking tongue assembly includes a left tongue fixing cavity 10, a left tongue spring 11, and a left bean box self-locking tongue 12. The right self-locking tongue assembly includes a right bean box self-locking tongue 13, a right tongue spring 14, and a right tongue fixing cavity 15. The left switch top rod assembly includes a left micro switch top rod 16, a left top rod spring 17, a left pan head screw 18, a left micro switch 19, a left bracket screw 24, and a left top rod bracket 25. The right switch top rod assembly includes a right top rod spring 20, a right pan head screw 21, a right micro switch top rod 22, a right micro switch 23, a right bracket screw 26, and a right top rod bracket 27. Another switch top rod assembly is provided on the bottom of the bean box tray or on the outer diameter side of the sharpening assembly at the side where the lower bean opening at the bottom protrusion of the bean box tray at the weighing assembly and the knife edge of the top protrusion of the sharpening assembly fit together.

[0033] The bottom of the bean box tray is provided with a motor support fixing plate 31, and the bottom of the motor support fixing plate is provided with a lower bean gear motor 36. The motor shaft of the lower bean gear motor passes through the motor support fixing plate and is connected with the transmission gear 30. The transmission gear passes through the bean box tray and is inserted into the gear hole of the lower bean gear exposed at the bottom of the bean box assembly in the top plate slot of the bean box tray. The lower bean gear motor is arranged at the bottom of the motor support fixing plate through a motor support seat. A weighing module 32 is arranged on one side of the bottom of the motor support fixing plate. The weighing module includes a weighing sensor and a weighing module fixing seat. The weighing support of the weighing sensor is attached to the bottom of the motor support fixing plate through a sensor bridge arm. The weighing sensor of the weighing module is limited to a gap in the weighing fixing seat and swings up and down and left and right. The weighing module is arranged at the bottom of the motor support fixing plate of the motor support fixing plate. An adjusting disk motor 34 is provided on the other side of the bottom of the motor bracket fixing plate. The motor shaft of the adjusting disk motor is meshed with the cutter disc adjusting gear 37 of the outer diameter of the grinding cutter head assembly through the adjusting gear 35. The rotation of the cutter disc adjusting gear drives the movable cutter sleeve in the grinding cutter head assembly to rotate, and the gap between the movable cutter sleeve in the grinding cutter head assembly and the stationary cutter head in the grinding cutter head assembly changes. The adjusting disk motor is fixedly arranged on one side of the outer shell of the grinding cutter assembly.

[0034] The specific implementation scheme of the coffee machine grinder is as follows: first, coffee beans are loaded into the bean box assembly, and then the bean box assembly loaded with coffee beans is placed into the weighing assembly. During the placement process, the convex point below the bean box assembly presses the right microswitch top rod of the weighing assembly to trigger the working mode. At the same time, during the placement process of the bean box assembly, the bean box assembly squeezes outwards the two self-locking protruding tongues on the left and right sides of the weighing assembly. The self-locking protruding tongues are squeezed and move outwards in a straight line. When they contact the groove area below the bean box assembly, the self-locking protruding tongue is subjected to the pressure disappearance, and is subjected to the rebound force of the protruding tongue spring, and rebounds back to its original position along the original route to lock the bean box assembly; the process of removing the bean box assembly is the same. Next, after the bean box assembly and the weighing assembly are locked and the microswitch is triggered, the beans begin to be ground, and the ground coffee powder enters the powder outlet channel. During the powder feeding process, the powder distribution motor inside the powder outlet channel drives the powder distribution fan blades to rotate. As the powder distribution fan blades rotate, the coffee powder falls evenly from the notch of the powder distribution fan blades to the bottom, and then is sifted through the powder sieve and evenly falls into the brewing chamber below.

[0035] In summary, the coffee machine grinder is a grinder system that evenly distributes powder, specifically a coffee machine working mechanism that can evenly distribute powder in a fully automatic coffee machine. The coffee machine grinder installs powder distribution fan blades and screens at the powder outlet through the powder outlet cover to solve the problem of uneven powder distribution, and the powder outlet cover is designed to be threaded for disassembly, which is convenient for taking out the fan blades and screens inside for cleaning; the powder outlet channel is fixed by a snap-fitting method of the rear powder outlet channel cover and the front powder outlet channel cover, which is convenient for the loading and unloading production of the corresponding components.

Claims

1. A coffee grinder for evenly distributing coffee powder, the coffee grinder comprising a bean box assembly (1) and a bean grinding assembly (2), the bean grinding assembly comprising a weighing assembly (28) and a knife grinding assembly, the weighing assembly serving as a bean box base assembly, a lower bean opening protruding from the bottom of the weighing assembly fitting with a knife edge protruding from the top of the knife grinding assembly, a lower bean opening in a top plate slot of a bean box tray (29) of the weighing assembly being aligned with a bean inlet of the bean box assembly, a motor shaft at a grinding motor (33) of the knife grinding assembly being connected to a grinding knife head assembly in a grinding chamber, the weighing assembly and the knife grinding assembly being fixedly arranged on a machine body, a bean box tray opening at the top of the weighing assembly being exposed from the machine body, and a powder outlet channel communicating with the grinding chamber in the knife grinding assembly being provided on one side of the knife grinding assembly; characterized in that A powder distribution fan blade (6) is provided in the powder outlet channel of the knife sharpening assembly, a powder screening net (7) is provided at the bottom channel opening of the powder outlet channel, the powder screening net is fixed to the bottom channel opening of the powder outlet channel through an inner and outer thread of a powder outlet cover (8), and a motor shaft of a powder distribution motor (3) extends into the powder outlet channel and is connected to the powder distribution fan blade; the top channel opening of the powder outlet channel on one side of the knife sharpening assembly is exposed from the machine body.

2. The coffee grinder for uniformly distributing coffee powder according to claim 1, characterized in that A notch (601) is provided on one side of the spiral blade of the powder distribution fan blade (6), the notch is 50°-60°, and the height difference between the upper and lower ends of the spiral blade of the powder distribution fan blade is 6mm-7mm.

3. The coffee grinder with uniform powder distribution according to claim 1, characterized in that The bean box tray (29) has self-locking tongue assemblies symmetrically disposed on the inner walls on both sides of the bottom, and a switch top rod assembly symmetrically disposed on at least one side of the outer diameter of the bean box tray; when the bean box assembly (1) is placed in the tray groove at the top of the bean box tray, the convex point at the bone position at the bottom of the bean box assembly triggers the micro switch of the switch top rod assembly, and at the same time, the rib position in the buckle groove at the bottom of the bean box assembly is limitedly buckled and fixed to the self-locking tongue of the self-locking tongue assembly.

4. The coffee grinder with uniform powder distribution according to claim 3, characterized in that The self-locking tongue assembly comprises a tongue fixing cavity, a tongue spring and a bean box self-locking tongue. The bean box self-locking tongue in the tongue fixing cavity extends out of a hole on one side of the tongue fixing cavity and a hole at a convex position on one side of the inner wall of the top groove of the bean box tray (29) through the tongue spring in the tongue fixing cavity. The hole on this side of the tongue fixing cavity is buckled and fixed to the outer groove at the convex position of the bean box tray. When the bean box assembly (1) is placed in the top groove of the bean box tray, the inner rib of the buckle groove at the bottom of the bean box assembly is buckled and fixed to the tongue fixing cavity extending out of the self-locking tongue assembly and the self-locking tongue on the inner wall of the top groove of the bean box tray.

5. The coffee grinder with uniform powder distribution according to claim 3, characterized in that The switch top rod assembly comprises a micro switch top rod, a top rod spring, a pan head screw, a micro switch, a top rod bracket and a bracket screw. The micro switch is fixed to a switch slot on one side of the outer diameter of the bean box tray (29) by means of the pan head screw. A movable spring on one side of the micro switch extends out of the switch slot and is aligned with a contact at one end of the switch top rod. A convex portion on the other side of the contact is inserted into a side groove protruding from the inner wall of the top groove of the bean box tray and having an opening at the top. The other end of the switch top rod is inserted into a top rod bracket fixed to the top rod bracket and provided with a top rod spring. The top rod bracket is arranged on the outer diameter of the bean box tray on one side of the micro switch by means of the bracket screw. When the bean box assembly (1) is placed in the top groove of the bean box tray, a convex point at the bone position at the bottom of the bean box assembly presses down on the convex portion of the top rod. The top rod moves downward to drive the contact to press down on the movable spring of the micro switch opening, thereby triggering the micro switch of the switch top rod assembly.

6. The coffee grinder for uniformly distributing coffee powder according to claim 5, characterized in that Another switch top rod assembly is provided on one side of the bean box tray (29) at the bottom protrusion where the lower bean opening and the top protrusion of the knife sharpening assembly fit together, at the bottom of the bean box tray or on the outer diameter side of the knife sharpening assembly.

7. The coffee grinder with uniform powder distribution according to claim 1, characterized in that A rear powder outlet channel cover (4) at the powder outlet channel on one side of the knife sharpening assembly is integrally formed with the outer shell of the knife sharpening assembly, and a front powder outlet channel cover (5) is fastened and fixed to the opening of the rear powder outlet channel cover.

8. The coffee grinder with uniform powder distribution according to claim 1, characterized in that A motor support fixing plate (31) is provided at the bottom of the bean box tray (29), a lower bean gear motor (36) is provided at the bottom of the motor support fixing plate, a motor shaft of the lower bean gear motor passes through the motor support fixing plate and is connected to the transmission gear (30), the transmission gear passes through the bean box tray and is sleeved and connected to the gear hole of the lower bean gear exposed at the bottom of the bean box assembly placed in the top plate slot of the bean box tray, and the lower bean gear motor is arranged at the bottom of the motor support fixing plate through a motor bracket.

9. The coffee grinder with uniform powder distribution according to claim 1, characterized in that A weighing module (32) is provided on one side of the bottom of the motor bracket fixing plate (31), the weighing module comprising a weighing sensor and a weighing module fixing seat, the weighing support plate of the weighing sensor is attached to the bottom of the motor bracket fixing plate via a sensor bridge arm, the weighing sensor of the weighing module is limited to a gap in the weighing fixing seat and swings up and down and left and right, and the weighing module is arranged at the bottom of the motor support seat of the motor bracket fixing plate.

10. The coffee grinder with uniform powder distribution according to claim 1, characterized in that An adjusting disk motor (34) is provided on the other side of the bottom of the motor bracket fixing plate (31); the motor shaft of the adjusting disk motor meshes with a cutter disc adjusting gear (37) on the outer diameter of the grinding cutter head assembly via an adjusting gear (35); the cutter disc adjusting gear rotates to drive the movable cutter sleeve in the grinding cutter head assembly to rotate, and the gap between the movable cutter sleeve in the grinding cutter head assembly and the stationary cutter head in the grinding cutter head assembly changes; the adjusting disk motor is fixedly arranged on a motor bracket of the motor bracket fixing plate or on one side of the outer shell of the grinding cutter assembly.

Images