CN109091031B

CN109091031B - Bean grinder convenient for adjusting grinding thickness

Info

Publication number: CN109091031B
Application number: CN201811161644.3A
Authority: CN
Inventors: 卢伟志
Original assignee: Guangdong Yide Electric Appliance Co ltd
Current assignee: Guangdong Yide Electric Appliance Co ltd
Priority date: 2018-09-30
Filing date: 2018-09-30
Publication date: 2024-04-09
Anticipated expiration: 2038-09-30
Also published as: CN109091031A

Abstract

The invention discloses a bean grinder convenient for adjusting the grinding thickness, which comprises a machine base, a shell, an upper cover and a powder receiving box, wherein the powder receiving box can be embedded into the machine base, a knife sharpening mechanism for grinding beans and an adjusting knob assembly for adjusting the grinding thickness are arranged in the machine base, the knife sharpening mechanism comprises an upper cutter disc assembly and a lower cutter disc assembly which is matched with the upper cutter disc assembly in installation, the lower cutter disc assembly is fixed in the machine base, and the upper cutter disc assembly is movably connected with the lower cutter disc assembly. The main purpose of the invention is that the rotation of the lower cutter disc body is controlled by the control knob assembly, the outer screw threads of the upper cutter disc body rotate along the inner screw threads of the lower cutter disc body to realize the lifting of the upper cutter disc body, and on the other hand, the interval between the upper cutter disc body and the lower cutter disc body is adjustable and locked by the cooperation of the outer screw threads and the inner screw threads, so that coffee powder with different thickness can be ground, and the invention is suitable for groups with different consumption.

Description

Bean grinder convenient for adjusting grinding thickness

Technical Field

The invention relates to a coffee bean grinder, in particular to a safe and easy-to-unpick and wash bean grinder capable of quickly adjusting the grinding thickness of coffee beans.

Background

In China, coffee has gained increasing consumer preference as a foreign product in recent years. The problems of public health status, water mixing proportion, freshness index, cooking degree and the like of coffee sold in the market are considered by consumers. Therefore, many households begin to consider purchasing coffee machines. In China, the coffee machine is widely used as a fashionable and practical household appliance in many urban families.

The quality of coffee depends on the quality of coffee beans, but in fact the quality of coffee depends largely on the freshness of the coffee powder. The quality of the imported coffee beans is obviously reduced even if the imported coffee beans are ground for one week, and the coffee beans are not ground for the right time, so that grinding of the coffee beans is important. The fineness of the coffee grounds is one of the important variables in determining the final quality of the coffee when making the coffee, since the fineness of the coffee grounds greatly influences the brewing conditions when making the coffee, and thus the pressure of the water during brewing, and thus the flow rate of the water provided by the water pump and the temperature of the water. In fact, the finer the coffee powder, the more effective the extraction of the substances contained in the powder, and the higher the concentration of the coffee, whereas the coarser the powder, the less effective the extraction of the substances contained in the powder, and the lighter the taste of the coffee produced.

Therefore, some coffee bean grinding machines appear on the market, and convenience is provided for users to grind coffee powder at any time. However, the existing coffee bean grinder can only grind coffee powder with the same thickness basically by the same machine, and the coffee bean grinder is difficult to conveniently adjust according to different requirements of different people on the thickness of the coffee powder, so that the bean grinding effect of the coffee bean grinder is single.

Disclosure of Invention

The invention aims to solve the technical problem of providing a bean grinder which is safe, easy to unpick and wash and capable of conveniently adjusting the grinding thickness of coffee beans.

In order to solve the technical problems, the technical scheme of the invention is as follows: the utility model provides a bean grinder convenient to adjust and grind thickness, includes frame, shell, upper cover and connects the powder box, connect the powder box can imbed in the frame, be equipped with the mechanism of whetting a knife that is used for grinding beans in the frame and be used for adjusting the adjust knob subassembly that grinds thickness, the mechanism of whetting a knife includes the lower blade disc subassembly of blade disc subassembly installation on last blade disc subassembly and the adaptation, the blade disc subassembly is fixed in the frame down, go up blade disc subassembly and blade disc subassembly swing joint down.

The upper cutter disc assembly comprises an upper cutter disc body and a head part for taking and placing the upper cutter disc body, a containing cavity for controlling bean placing amount and a through hole communicated with the lower cutter disc assembly are arranged in the upper cutter disc body, and an outer screw tooth for connecting the lower cutter disc assembly is arranged on the outer side wall of the upper cutter disc body.

The lower cutter disc assembly comprises a lower cutter disc body and a lower cutter blade, an inner thread of an adaptive locking outer thread is arranged on the inner side wall of the lower cutter disc body, and a rack for rotating the lower cutter disc body is further arranged on the outer circumference of the lower cutter disc body.

The adjusting knob assembly comprises a knob, a first gear and a second gear, the first gear is connected with the knob through a gear shaft, the second gear comprises an upper gear and a lower gear coaxially arranged with the upper gear, the upper gear is meshed with the first gear for transmission, and the lower gear is meshed with the rack for transmission.

As an improvement, the machine base comprises an upper machine base and a lower machine base which is matched with the upper machine base, the lower cutter disc body is fixed in the upper machine base, and the powder receiving box is embedded in the lower machine base.

As an improvement, a platform is arranged on the lower base, a micro-switch device for switching on a power supply of the sharpening mechanism is arranged on the platform, the micro-switch device comprises a micro-switch, a support frame, a sliding block for triggering the micro-switch to be opened and a pushing block, the sliding block is elastically connected with the pushing block through a spring, the pushing block is in sliding connection with the support frame, the micro-switch is fixed at the top end of the support frame, and the support frame is fixed on the platform.

As an improvement, the pushing block comprises an upper pushing block and a lower pushing block, and a guide block for sliding the upper pushing block in the supporting frame is arranged on the side wall of the upper pushing block; and a guide groove for adapting the sliding of the guide block is formed in the support frame.

As an improvement, a long hole for the push-down block to pass through is formed in the platform, and the push-down block passes through the long hole and is movably connected with the powder receiving box.

As an improvement, a notch for sliding block movement is arranged on the push-up block.

As an improvement, the side wall of the upper machine seat is provided with a self-locking block for locking the lower cutter disc body, the outer circumference of the lower cutter disc body is also provided with a notch for accommodating the self-locking block, and the edge of the notch is also provided with a bulge for clamping the self-locking block.

As an improvement, the upper edge of the upper cutterhead disc body is provided with a starting block for simultaneously pushing the sliding block and unlocking the self-locking block.

Compared with the prior art, the invention has the following beneficial effects.

(1) According to the invention, the rotation of the lower cutter disc body is controlled by the control knob assembly, so that the outer screw threads of the upper cutter disc body rotate along the inner screw threads of the lower cutter disc body, and the upper cutter disc body can move in the longitudinal direction, so that the lifting effect of the upper cutter disc body is achieved; on the other hand, the interval between the upper cutter disc body and the lower cutter disc body is adjustable through the cooperation of the outer screw threads and the inner screw threads, so that coffee powder with different thicknesses is ground, and the coffee powder is suitable for groups with different consumption.

(2) The safety switch device and the self-locking block are additionally arranged, after the upper cutter disc body and the lower cutter disc body are assembled, the safety switch device is connected with the power supply of the bean grinder, and meanwhile, the self-locking block is unlocked, so that the situation that people are injured due to the fact that a switch button is touched by mistake when the upper cutter disc body is not installed is avoided, and the safety performance is greatly improved.

Drawings

Fig. 1 is a schematic diagram of the present invention.

Fig. 2 is a schematic exploded view of the present invention.

Fig. 3 is a schematic view of another angular exploded construction of the present invention.

Fig. 4 is a schematic view of the installation of the present invention with respect to the upper cutterhead assembly.

Fig. 5 is a schematic view of the structure of the lower cutterhead assembly according to the present invention.

Fig. 6 is a schematic diagram of the overall structure of the safety switching device according to the present invention.

Fig. 7 is a schematic view showing an exploded structure of the safety switching device according to the present invention.

Fig. 8 is a schematic view of another angle structure of the safety switching device according to the present invention.

Fig. 9 is a schematic view of the present invention with respect to the upward sliding of the slider.

FIG. 10 is a schematic view of the present invention with respect to the sliding of a slider toward a microswitch.

FIG. 11 is a schematic view of the structure of the present invention in which the actuating block and the slider slide cooperatively.

Fig. 12 is a schematic structural view of the present invention about a self-locking block locking lower cutterhead disc.

Fig. 13 is an enlarged view at a in fig. 12.

FIG. 14 is a schematic view of the structure of the present invention with respect to an adjustment knob assembly.

In the figure: the machine base 1, the housing 2, the upper cover 3, the powder receiving box 4, the sharpening mechanism 5, the adjusting knob assembly 6, the safety switch device 7, the self-locking block 8, the control button 9, the upper end face 41, the upper cutter disc assembly 51, the lower cutter disc assembly 52, the knob 61, the first gear 62, the second gear 63, the gear shaft 64, the micro switch 71, the slide block 72, the push block 73, the support frame 74, the spring 75, the locking part 81, the pressing part 82, the self-locking block spring 83, the upper machine base 101, the lower machine base 102, the platform 103, the long hole 104, the notch 105, the upper cutter disc 510, the head 511, the lower cutter disc 520, the lower cutter disc 521, the upper gear 631, the lower gear 632, the second inclined face 720, the push-up block 731, the push-down block 732, the guide block 733, the notch 734, the guide slot 741, the housing 5100, the external screw 5101, the through hole 5102, the starting block 5103, the first inclined face 5204, the internal screw 5201, the rack 5202, the notch 3, the protrusions 5204, and the inclined faces 7320.

Description of the embodiments

The present invention will be described in further detail with reference to the accompanying drawings.

As shown in fig. 1 to 4, a bean grinder for adjusting grinding thickness comprises a machine base 1, a housing 2, an upper cover 3 and a powder receiving box 4, wherein in this embodiment, the machine base 1 comprises an upper machine base 101 and a lower machine base 102 adapted to be installed on the upper machine base 101.

The machine base 1 is internally provided with a sharpening mechanism 5 for sharpening beans, the sharpening mechanism 5 comprises an upper cutter disc assembly 51 and a lower cutter disc assembly 52 which is matched with the upper cutter disc assembly 51, in particular, the lower cutter disc body 520 is fixed in the upper machine base 101, and the powder receiving box 4 is embedded in the lower machine base 102. The upper cutterhead assembly 51 includes an upper cutterhead disc 510 and a head 511 for picking and placing the upper cutterhead disc 510, wherein the head 511 is designed as a tip, so that the picking and placing are facilitated. The upper cutter disc body 510 is provided with a cavity 5100 for controlling bean amount and a through hole 5102 communicated with the lower cutter disc assembly 52, and a user can place coffee beans in the cavity 5100, and as the cavity 5100 is inclined, the coffee beans can slide to the through hole 5102 along the cavity 5100 and slide to the lower cutter disc assembly 52 after passing through the through hole 5102, see fig. 4. In addition, an outer screw 5101 for connecting with the lower cutter assembly 52 is provided on the outer wall of the upper cutter disc body 510. Correspondingly, the lower cutterhead assembly 52 comprises a lower cutterhead disc body 520 and a lower cutter knife 521, an inner thread 5201 which is adapted to lock the outer thread 5101 is arranged on the inner side wall of the lower cutterhead disc body 520, and a rack 5202 for rotating the lower cutterhead disc body 520 is further arranged on the outer circumference of the lower cutterhead disc body 520, as shown in fig. 5. Through the lower cutter disc 520 of clockwise rotation, the internal thread 5201 also follows the lower cutter disc 520 to rotate together, and the external thread 5101 is locked at the lower end of the internal thread 5201, so that the locking and descending of the upper cutter disc 510 are realized, and meanwhile, the distance between the upper cutter disc 510 and the lower cutter disc 520 is reduced, so that finer coffee powder can be ground. Conversely, the lower cutter disc 520 is rotated counterclockwise, the internal thread 5201 also rotates along with the lower cutter disc 520, and the external thread 5101 is gradually lifted along with the rotation of the internal thread 5201, so that the unlocking and lifting of the upper cutter disc 510 are realized, and meanwhile, the distance between the upper cutter disc 510 and the lower cutter disc 520 is increased, so that coffee powder with larger particles can be ground. By matching the upper cutter disc body 510 and the lower cutter disc body 520, coffee powder with different thicknesses can be ground to adapt to different user groups, and diversified choices are provided.

In order to facilitate the rotation of the lower cutterhead disc 520, the invention is further provided with an adjusting knob assembly 6 for rotating the lower cutterhead disc 520, as shown in fig. 2 and 14, the adjusting knob assembly 6 comprises a knob 61, a first gear 62 and a second gear 63, the first gear 62 is connected with the knob 61 through a gear shaft 64, the knob 61 extends out of the casing 2, specifically, the first gear 62 is a gear with helical teeth, the second gear 63 comprises an upper gear 631 and a lower gear 632 coaxially arranged with the upper gear 631, the upper gear 631 is a helical gear adapted to be meshed with the first gear 62, and the lower gear 632 is meshed with a rack 5202 for transmission. By rotating the knob 61 clockwise, the knob 61 drives the first gear 62 to rotate anticlockwise through the gear shaft 64, meanwhile, the first gear 62 drives the upper gear 631 to rotate anticlockwise, the upper gear 631 drives the coaxial lower gear 632 to rotate anticlockwise, the lower gear 632 rotates clockwise under the condition of meshing with the rack 5202, and the lower cutterhead disc 520 rotates clockwise, so that locking and descending of the upper cutterhead disc 510 are achieved. Conversely, rotating the knob 61 counterclockwise, the knob 61 drives the first gear 62 to rotate clockwise through the gear shaft 64, and at the same time the first gear 62 drives the upper gear 631 to rotate clockwise, and the upper gear 631 in turn drives the coaxial lower gear 632 to rotate clockwise, and the lower gear 632 rotates counterclockwise while engaging with the rack 5202, thereby unlocking and lifting the upper cutterhead disc 510.

In practice, some consumers may accidentally start the coffee machine by touching the power switch of the coffee machine by mistake, so that the precedent of injury is frequent. In the invention, in order to prevent the accidents, a self-locking block 8 and a safety switch device 7 are added to improve the safety of the bean grinder. Specifically, a self-locking block 8 for locking the lower cutterhead disc 520 is arranged on the side wall of the upper stand 101, the self-locking block 8 comprises a locking part 81 and a pressing part 82, a self-locking block spring 83 is arranged on the self-locking block 8, a notch 5203 which is suitable for placing the self-locking block 8 is also arranged on the outer circumference of the lower cutterhead disc 520, see fig. 12 and 13, when the self-locking block 8 is not acted by external force, the locking part 81 is embedded into the notch 5203 under the action of the elasticity of the self-locking block spring 83, so that the lower cutterhead disc 520 cannot rotate, further, in order to more firmly lock the lower cutterhead disc 520 by the self-locking block 8, a protrusion 5204 for clamping the self-locking block 8 is further arranged on the edge of the notch 5203, the rotation of the lower cutterhead disc 520 is completely limited, and the knob 61 cannot rotate in any direction at this time; when the pressing portion 82 is subjected to an external force (downward pressure), the pressing portion 82 is pressed, the locking portion 81 is tilted outwards under the action of the elastic force of the self-locking block spring 83, so that the locking portion 81 is far away from the notch 5203, a gap exists between the locking portion 81 and the notch 5203, and at this time, the knob 61 can rotate, so that the lower cutterhead disc 520 can also be driven to rotate by the second gear 63.

As shown in fig. 2, 6, 7, 8, 9, 10 and 11, a platform 103 is disposed on the lower frame 102, a safety switch device 7 for switching on the power supply of the sharpening mechanism 5 is disposed on the platform 103, the safety switch device 7 includes a micro switch 71, a support 74, a slider 72 for triggering the micro switch 71 to be turned on, and a push block 73, specifically, the support 74 is fixed on the platform 103, and the micro switch 71 is fixed on the top end of the support 74. While the push block 73 includes an up-push block 731 and a down-push block 732, and the slider 72 is elastically connected to the up-push block 731 by a spring 75. The spring 75 plays a role of buffering when the slider 72 is pressed to move in the direction of the push-up block 731, and the spring force of the spring 75 bounces the slider 72 to the original position after the pressing is lost, thereby realizing the sliding of the slider 72. In addition, the push-up block 731 is provided with a notch 734 for moving the slider 72. In this embodiment, the push-up block 731 is slidable in the support frame 74, specifically, a guide block 733 for sliding the push-up block 731 in the support frame 74 is provided on a side wall of the push-up block 731, and a guide groove 741 for adapting to the sliding of the guide block 733 is provided in the support frame 74, so that the push-up block 731 can only move in the longitudinal direction. On the other hand, the platform 103 is further provided with a long hole 104 for the push-down block 732 to pass through, preferably, the push-down block 732 passes through the long hole 104 to contact with the powder receiving box 4, when the powder receiving box 4 is embedded into the lower base 102, firstly, the upper end face 41 of the powder receiving box 4 pushes the inclined surface 7320 of the push-down block 732 to enable the push-down block 732 to have a trend of moving upwards, and the push-up block 731 moves upwards along the guide groove 741 under the pushing of the push-down block 732, and at the moment, the sliding block 72 is also lifted to the height of the micro switch 71 through the notch 734 to wait for touching the micro switch 71; when the powder receiving box 4 is taken out from the lower base 102, the upward moving trend of the push-down block 732 disappears, so that the push-up block 731 slides down to the original position along the guide groove 741, and the overall height of the slider 72 is lower than the height of the support frame 74. The purpose of this arrangement is to prevent some consumers from inadvertently forgetting to place the powder receiving box 4 on the lower housing 102 and starting the bean grinder, so that waste of bean powder is avoided, i.e. the bean grinder cannot be started when the powder receiving box 4 is not embedded in the lower housing 102, which is the first safety line of the invention.

As an improvement, in order to open the safety switch device 7 and unlock the self-locking block 8, the upper edge of the upper cutterhead disc body 510 is provided with a starting block 5103, as shown in fig. 3, 4, 11 and 12, the number of the starting blocks 5103 is three, correspondingly, the upper frame 101 is provided with a notch 105 for contacting the starting block 5103 with the sliding block 72 and the starting block 5103 with the pressing part 82, the top end of the sliding block 72 and the pressing part 82 are respectively embedded into the notch 105, so that when the upper cutterhead disc body 510 is mounted on the lower cutterhead disc body 520, the starting block 5103 presses the sliding block 72, namely the first inclined surface 5104 slides downwards along the second inclined surface 720, so that the sliding block 72 integrally moves towards the direction of the notch 734, and thus the micro switch 71 is touched, and the power supply of the bean grinder is switched on; when the start block 5103 pushes down the pressing portion 82, the locking portion 81 is tilted outward, and the distance between the lower cutter disc 520 and the upper cutter disc 510 can be adjusted. This is the second line of security of the present invention.

The working principle of the invention is as follows: the powder receiving box 4 is embedded into the lower base 102, the upper end face 41 of the powder receiving box 4 pushes the push-down block 732 upwards along the inclined plane 7320, the push-up block 731 also slides upwards along the guide groove 741 along with the push-down block 732, and further the push slider 72 also rises to the position of the micro switch 71, and at this time, the slider 72 is separated from the micro switch 71; then, the starting block 5103 is aligned with the notch 105, the upper cutter disc assembly 51 is installed on the lower cutter disc body 520, at the moment, the outer screw thread 5101 is placed at the inlet of the inner screw thread 5201, the starting block 5103 simultaneously presses down the sliding block 72 and the pressing part 82 arranged in the notch 105, the first inclined surface 5104 slides downwards along the second inclined surface 720, so that the sliding block 72 is pushed to move towards the direction of the notch 734 until the sliding block 72 reduces the interval with the micro switch 71 and finally presses on the micro switch 71, and the power supply of the coffee machine is switched on; the starting block 5103 pushes down the pressing part 82 and simultaneously makes the locking part 81 outwards tilt under the action of the elasticity of the self-locking block spring 83, namely, the state of the attaching notch 5203 is converted into the separated state, at the moment, the knob 61 can be rotated clockwise to adjust the grinding thickness, namely, the knob 61 drives the lower cutter disc body 520 to rotate through the meshing rotation of the first gear 62, the second gear 63 and the rack 5202, the internal thread 5201 screws the external thread 5101 arranged at the inlet, the distance between the upper cutter disc body 510 and the lower cutter disc body 520 is gradually reduced while the external thread 5101 moves along the lines of the internal thread 5201, the locking and descending of the upper cutter disc assembly 51 are realized, and finer powder can be ground by pushing the control button 9. Conversely, to grind coarser powder, only the knob 61 is rotated counterclockwise, the internal thread 5201 screws the external thread 5101 back to a position close to the inlet, and the distance between the upper cutterhead disk 510 and the lower cutterhead disk 520 is gradually increased, so that coarser bean powder is ground. When the knob 61 is rotated to return to the initial position, the protrusion 5204 blocks the locking portion 81, the knob 61 cannot rotate counterclockwise any more, meanwhile, the outer screw 5101 also returns to the inlet of the inner screw 5201, the upper cutter assembly 51 is lifted and unlocked, and the upper cutter assembly 51 can be taken out for cleaning, so that the taste and quality of the next grinding are ensured. When the upper cutterhead assembly 51 is taken out of the lower cutterhead disc 520, the starting block 5103 does not apply downward pressing to the sliding block 72 and the pressing portion 82 any more, the sliding block 72 is sprung out of the notch 734 due to the acting force of the spring 75, the sliding block 72 is not contacted with the micro switch 71 any more, and at this time, the power supply of the coffee machine is disconnected. The powder receiving box 4 is pulled out again, so that the push-down block 732 loses the external force of being pushed upwards, and the push-down block 732 moves downwards under the action of the spring until the push-down block 732 stretches out of the long hole 104 again (i.e. returns to the original position), and meanwhile, the push-up block 731 is driven to move downwards together with the sliding block 72 to be lowered to the original height position.

In summary, the two safety lines provided by the invention can provide a safe use environment for the bean grinder, and the adjusting knob 61 can control the distance between the upper cutter disc body 510 and the lower cutter disc body 520 so as to control the thickness of the ground powder, thereby greatly improving the safety performance and adaptability of the bean grinder and having good market prospect.

The foregoing describes in detail preferred embodiments of the present invention. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the invention by one of ordinary skill in the art without undue burden. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims

1. Bean grinder convenient to adjust and grind thickness, including frame (1), shell (2), upper cover (3) and connect powder box (4), connect powder box (4) can imbed in frame (1), its characterized in that: a knife sharpening mechanism (5) for sharpening beans and an adjusting knob assembly (6) for adjusting the grinding thickness are arranged in the machine base (1), the knife sharpening mechanism (5) comprises an upper cutter disc assembly (51) and a lower cutter disc assembly (52) which is matched with the upper cutter disc assembly (51) to be installed, the lower cutter disc assembly (52) is fixed in the machine base (1), and the upper cutter disc assembly (51) is movably connected with the lower cutter disc assembly (52);

the upper cutter disc assembly (51) comprises an upper cutter disc body (510) and a head (511) for taking and placing the upper cutter disc body (510), a cavity (5100) for controlling bean placing amount and a through hole (5102) communicated with the lower cutter disc assembly (52) are arranged in the upper cutter disc body (510), and an outer screw tooth (5101) for connecting the lower cutter disc assembly (52) is arranged on the outer side wall of the upper cutter disc body (510);

the lower cutter disc assembly (52) comprises a lower cutter disc body (520) and a lower cutter blade (521), an inner thread (5201) which is matched with and locks the outer thread (5101) is arranged on the inner side wall of the lower cutter disc body (520), and a rack (5202) for driving the lower cutter disc body (520) to rotate is further arranged on the outer circumference of the lower cutter disc body (520);

the adjusting knob assembly (6) comprises a knob (61), a first gear (62) and a second gear (63), the first gear (62) is connected with the knob (61) through a gear shaft (64), the second gear (63) comprises an upper gear (631) and a lower gear (632) coaxially arranged with the upper gear (631), the upper gear (631) is in meshed transmission with the first gear (62), and the lower gear (632) is in meshed transmission with a rack (5202).

2. A bean grinder for facilitating adjustment of grinding thickness as set forth in claim 1, wherein: the machine seat (1) comprises an upper machine seat (101) and a lower machine seat (102) which is matched with the upper machine seat (101), the lower cutter disc body (520) is fixed in the upper machine seat (101), and the powder receiving box (4) is embedded into the lower machine seat (102).

3. A bean grinder for facilitating adjustment of grinding thickness according to claim 2, wherein: be equipped with a platform (103) on lower frame (102), be equipped with on platform (103) and be used for switching on safety switch device (7) of sharpening mechanism (5) power, safety switch device (7) include micro-gap switch (71), support frame (74), be used for touching slider (72) and ejector pad (73) that micro-gap switch (71) opened, slider (72) pass through spring (75) and ejector pad (73) elastic connection, ejector pad (73) and support frame (74) sliding connection, the top at support frame (74) is fixed to micro-gap switch (71).

4. A bean grinder for facilitating adjustment of grinding thickness according to claim 3, wherein: the pushing block (73) comprises an upward pushing block (731) and a downward pushing block (732), and a guide block (733) used for the upward pushing block (731) to slide in the supporting frame (74) is arranged on the side wall of the upward pushing block (731); guide grooves (741) which are matched with the guide blocks (733) to slide are formed in the support frames (74).

5. The bean grinder for facilitating adjustment of grinding thickness according to claim 4, wherein: the platform (103) is provided with a long hole (104) for the push-down block (732) to pass through, and the push-down block (732) passes through the long hole (104) and is movably connected with the powder receiving box (4).

6. The bean grinder for facilitating adjustment of grinding thickness according to claim 4, wherein: the push-up block (731) is provided with a notch (734) for moving the sliding block (72).

7. A bean grinder for facilitating adjustment of grinding thickness according to claim 2, wherein: the side wall of the upper machine seat (101) is provided with a self-locking block (8) for locking the lower cutter disc body (520), the outer circumference of the lower cutter disc body (520) is also provided with a notch (5203) which is adapted to the placement of the self-locking block (8), and the edge of the notch (5203) is also provided with a protrusion (5204) for clamping the self-locking block (8).

8. A bean grinder for facilitating adjustment of grinding thickness according to any one of claims 1 to 7, wherein: the upper edge of the upper cutterhead disc body (510) is provided with a starting block (5103) for simultaneously pushing the sliding block (72) and unlocking the self-locking block (8).