Hand-cranking bean grinder with double lock catches

Abstract

The utility model relates to the technical field of bean grinders, in particular to a hand-cranking bean grinder with double lock catches. Comprising a shell, a cutterhead seat and a powder receiving cup which are sequentially arranged, a hand-cranking assembly is arranged on the shell, and a cutterhead assembly is arranged on the cutterhead seat; the cutterhead seat is detachably connected with the shell through a first spinning buckle structure, and the powder receiving cup is detachably connected with the cutterhead seat through a second spinning buckle structure; a switch assembly is arranged on the cutterhead seat and is respectively connected with the shell and the powder receiving cup, so that the shell, the powder receiving cup and the cutterhead seat are locked / unlocked; according to the hand-cranking bean grinder with the double lock catches, the shell and the powder receiving cup are connected with the cutter head seat in a matched mode through the rotary buckle structures respectively, the shell and the powder receiving cup can be synchronously locked / unlocked through the switch assembly, disassembly and assembly are convenient, the cutter head assembly is arranged on the cutter head seat, the cutter head assembly can be integrally disassembled and cleaned, and therefore the hand-cranking bean grinder with the double lock catches is convenient to use. And the use experience of the user can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee grinders, in particular to a hand-cranked coffee grinder with a double locking mechanism. Background Art

[0002] Coffee is a beverage often consumed in people's daily lives. A coffee grinder is an essential device for preparing fresh coffee. A coffee grinder refers to a device that crushes and grinds coffee beans, and the function of the coffee grinder can be integrated into a coffee machine. In more scenarios, people prefer to use a hand-cranked grinding device to experience the process of making coffee by hand and the flavor of fresh coffee through grinding, extraction, and modulation.

[0003] Common hand-cranked coffee grinders on the market mainly include a grinding cylinder, a main body, and a powder receiving cup arranged in sequence from top to bottom, as well as a cutter head assembly. The cutter head assembly is divided into two parts, the lower cutter head is fixedly arranged in the main body, and the upper cutter head is arranged in the grinding cylinder. Chinese Patent CN215457439U discloses a coffee grinder that is convenient to use and clean, including a grinding assembly detachably connected to the upper part of the machine body. The grinding assembly includes a rotating base, the outer wall of the rotating base is provided with a rotating lock, one end of the rotating lock is provided with a lower transition section, and the upper part of the rotating lock is provided with a convex point. The machine body includes a main body upper cover, the inner wall of the main body upper cover is provided with a number of main body convex strips, and the inner wall of the main body upper cover is also provided with a number of main body convex points. One end of each main body convex strip is provided with an upper transition section, and the lower part of each main body convex strip is provided with a convex strip concave point. The shape of the lower transition section and the upper transition section can cooperate with each other to guide the rotating lock to be inserted between the main body convex strip and the main body convex point, and the convex point can be inserted into the convex strip concave point to fix the rotating lock.

[0004] In the above-mentioned prior art, the upper cutter head can be detached together with the grinding cylinder, while the lower cutter head is not detachable from the machine body. There is always coffee powder residue after grinding and it is not easy to clean. Moreover, most of the existing powder receiving cups are fixed to the machine body by magnetic attraction or screw thread engagement. When shaking the machine to grind coffee, the magnetic attraction method is likely to cause the powder receiving cup to fall off, and the screw thread engagement method is not very convenient to operate. Therefore, the prior art still needs to be improved and developed. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a hand-cranked coffee grinder with a double locking mechanism, which has a reasonable structure, can detach the cutter head assembly as a whole, and is convenient for disassembly and assembly, aiming at the defects and deficiencies of the prior art.

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

[0007] A hand-cranked coffee grinder with a double locking mechanism according to the present utility model includes a housing, a cutter head seat, and a powder receiving cup arranged in sequence. A hand-cranking assembly is provided on the housing, and a cutter head assembly is provided on the cutter head seat. The cutter head seat is detachably connected to the housing through a first screw-fastening structure, and the powder receiving cup is detachably connected to the cutter head seat through a second screw-fastening structure. A switch assembly is provided on the cutter head seat, and the switch assembly is respectively connected to the housing and the powder receiving cup, so as to lock / unlock the housing, the powder receiving cup, and the cutter head seat. The housing and the powder receiving cup can be quickly assembled with the cutter head seat through the first screw-fastening structure and the second screw-fastening structure. The first screw-fastening structure and the second screw-fastening structure axially connect the housing, the cutter head seat, and the powder receiving cup in sequence into a whole, and then the switch assembly circumferentially locks the housing, the cutter head seat, and the powder receiving cup to prevent the first screw-fastening structure and the second screw-fastening structure from loosening. On the contrary, during disassembly, the first screw-fastening structure and the second screw-fastening structure can be quickly unlocked through the switch assembly, so as to disassemble the housing, the powder receiving cup, and the cutter head seat, which is convenient for cleaning the cutter head assembly on the cutter head seat and can effectively improve the user experience.

[0008] According to the above solution, an inner housing is provided at the upper end of the cutter head seat, and the inner housing is concentrically arranged inside the housing. The first screw-fastening structure is arranged between the inner housing and the housing. A mating sleeve is provided at the lower end of the cutter head seat, and the mating sleeve is concentrically arranged inside the powder receiving cup. The second screw-fastening structure is arranged between the mating sleeve and the powder receiving cup. The housing and the cutter head seat form a rotational fit through the concentrically arranged inner housing, and the powder receiving cup and the cutter head seat form a rotational fit through the concentrically arranged mating sleeve, so that the first screw-fastening structure and the second screw-fastening structure can realize the detachable connection between the housing, the powder receiving cup, and the cutter head seat through rotation.

[0009] According to the above solution, the first screw-fastening structure includes a long guide groove, a first locking groove, and a first slider. The long guide groove and the first locking groove are arranged on the outer side wall of the inner housing. The long guide groove is arranged vertically, and the first locking groove is arranged horizontally at the lower end of the long guide groove. The first slider is arranged inside the lower port of the housing. When the inner housing is inserted into the lower port of the housing, the first slider can be inserted along the long guide groove and locked in the first locking groove. When the housing is inserted, it is first sleeved on the inner housing in the vertical direction. At this time, the first slider slides along the long guide groove to the first locking groove, and then the housing and the cutter head seat rotate relative to each other by a certain angle, so that the first slider slides into the first locking groove to form an axially mating connection. It can be understood that the housing and the cutter head seat can be disassembled by operating the above process in reverse.

[0010] According to the above solution, the second screwing structure includes a short guide groove, a second locking groove, and a second slider. The short guide groove and the second locking groove are provided on the outer side wall of the mating sleeve. The short guide groove is arranged vertically, and the second locking groove is arranged horizontally at the upper end of the short guide groove. The second slider is arranged in the upper port of the powder receiving cup. When the mating sleeve is inserted into the upper port of the powder receiving cup, the second slider can be inserted along the short guide groove and locked on the second locking groove. As described above, when the powder receiving cup is inserted, it is first sleeved on the mating sleeve in the vertical direction. At this time, the second slider slides along the short guide groove to the second locking groove. Then, the powder receiving cup rotates a certain angle relative to the cutter head seat, so that the second slider slides into the second locking groove to form an axially mating connection. It can be understood that the powder receiving cup and the cutter head seat can be disassembled by operating the above process in reverse.

[0011] According to the above solution, the switch assembly includes a first locking pin and a second locking pin. A first locking hole is provided between the cutter head seat and the inner shell, and the first locking pin is movably inserted through the first locking hole. A limiting rib is provided at the lower port of the housing. The first locking pin cooperates with the first limiting rib to lock / unlock the housing and the cutter head seat in the circumferential direction. A second locking hole is provided between the cutter head seat and the mating sleeve, and the second locking pin is movably inserted through the second locking hole. A limiting groove is provided in the upper port of the powder receiving cup. The second locking pin cooperates with the limiting groove to lock / unlock the cutter head seat and the powder receiving cup in the circumferential direction. The first locking pin can extend or retract into the first locking hole to coincide with or be misaligned with the limiting rib, so as to lock / unlock the housing and the cutter head seat in the circumferential direction, enabling the housing to be detachably connected to the cutter head seat through the first screwing structure. Similarly, the second locking pin can extend or retract into the second locking hole. When the second locking pin is stuck in or slides out of the limiting groove, the powder receiving cup and the cutter head seat can be locked / unlocked in the circumferential direction, so that the powder receiving cup can be detachably connected to the cutter head seat through the second screwing structure. It can be understood that the first locking pin and the second locking pin can be respectively driven by the switch assembly to achieve asynchronous driving. Preferably, the first locking pin and the second locking pin of the present invention are synchronously driven by the switch assembly, with a simpler overall structure and more convenient unlocking operation.

[0012] According to the above solution, the switch assembly further includes a button and a spring. An action cavity is provided in the cutter head seat, and the first locking hole and the second locking hole respectively communicate with the action cavity. The button and the spring are arranged in the action cavity, and the first locking pin and the second locking pin are respectively fixedly connected to the button. A switch hole is provided on the side wall of the cutter head seat, and the spring abuts against the button to make it protrude from the switch hole. Specifically, the spring abuts against the inner end of the button, so that the outer end of the button passes through and protrudes from the switch hole. At this time, the first locking pin and the second locking pin are respectively connected to the limiting rib and the limiting groove in a matching manner, locking the housing and the powder receiving cup on the cutter head seat. The user can press the button to drive the first locking pin and the second locking pin to synchronously retract into the first locking hole and the second locking hole. At the same time, one hand of the user holds the cutter head seat, and the other hand can rotate the housing or the powder receiving cup to disassemble it from the cutter head seat.

[0013] According to the above solution, the hand-cranking assembly includes a handle, a first main shaft, and an output head. The first main shaft is rotatably arranged in the housing, and the handle is fixedly connected to the upper end of the first main shaft; the output head is fixedly arranged at the lower end of the first main shaft, and an input head is provided on the cutter head assembly. The output head and the input head are engaged so that the hand-cranking assembly is drivingly connected to the cutter head assembly. The hand-cranking assembly forms a separable driving connection through the output head and the input head, so that when the housing is separated from the cutter head seat, the cutter head assembly can be disassembled as a whole for cleaning.

[0014] According to the above solution, the cutter head assembly includes a grinding sleeve, a second main shaft, and a grinding head. The second main shaft is rotatably arranged in the inner housing, and the input head is fixedly arranged at the upper end of the second main shaft; the grinding sleeve is arranged in the cutter head seat, the grinding head is rotatably arranged in the grinding sleeve, and the grinding head is fixed to the lower end of the second main shaft through a limit seat. The above handle drives the input head and the second main shaft to rotate through the first main shaft and the output head, so that the grinding head and the grinding sleeve rotate relative to each other to realize the grinding process of coffee beans. Preferably, the grinding head is installed at the lower end of the second main shaft through a limit seat, and the limit seat is threadedly connected to the second main shaft, so that the grinding head can be disassembled from the cutter head seat for cleaning.

[0015] According to the above solution, the cutter head assembly further includes an adjustment knob. The adjustment knob is in threaded cooperation with the cutter head seat and is paired with the grinding sleeve. The adjustment knob can adjust the gap between the grinding sleeve and the grinding head, so as to adjust the grinding particle size of the coffee powder. It can be understood that the adjustment knob adjusts the stroke of the grinding sleeve by screwing in and out the thread. Further, the grinding sleeve can be disassembled through the adjustment knob, so that the cutter head assembly can be cleaned as a whole, which is convenient for users to use.

[0016] A hand-cranked coffee grinder with a double locking mechanism according to the present invention. The housing and the powder receiving cup are respectively in threaded engagement with the cutter head seat through a snap structure. The switch assembly can synchronously lock / unlock the housing and the powder receiving cup, and the disassembly and assembly are relatively convenient. The cutter head assembly is arranged on the cutter head seat, and the cutter head assembly can be disassembled as a whole and cleaned, which can effectively improve the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0018] Figure 2 is a schematic diagram of the disassembled state structure of the housing and the cutter head seat of the present invention;

[0019] Figure 3 is a schematic perspective view of the assembled structure of the housing and the cutter head seat of the present invention;

[0020] Figure 4It is a schematic structural diagram of the split state of the cutter head seat and the powder receiving cup of the present utility model;

[0021] Figure 5 It is a schematic perspective structural diagram of the assembly of the cutter head seat and the powder receiving cup of the present utility model;

[0022] Figure 6 It is a schematic diagram of the overall exploded structure of the present utility model.

[0023] In the figure: 1. Housing; 2. Cutter head seat; 3. Powder receiving cup; 4. Cutter head assembly; 11. First slider; 12. Limit rib; 13. Handle; 14. First main shaft; 15. Output head; 21. Inner housing; 22. Adaptor; 23. First locking pin; 24. Second locking pin; 25. Button; 26. Spring; 201. Action chamber; 202. Switch hole; 211. Long guide groove; 212. First buckle groove; 213. First locking hole; 221. Short guide groove; 222. Second buckle groove; 223. Second locking hole; 31. Second slider; 32. Limit groove; 41. Input head; 42. Grinding sleeve; 43. Second main shaft; 44. Grinding head; 45. Limit seat; 46. Adjusting knob. Specific embodiments

[0024] The technical solutions of the present utility model will be described below in conjunction with the accompanying drawings and embodiments.

[0025] As Figure 1-6 shown, a hand-cranked coffee grinder with a double locking mechanism according to the present utility model includes a housing 1, a cutter head seat 2, and a powder receiving cup 3 arranged in sequence. A hand-cranking assembly is provided on the housing 1, and a cutter head assembly 4 is provided on the cutter head seat 2. The cutter head seat 2 is detachably connected to the housing 1 through a first screwing structure, and the powder receiving cup 3 is detachably connected to the cutter head seat 2 through a second screwing structure. A switch assembly is provided on the cutter head seat 2, and the switch assembly is respectively connected to the housing 1 and the powder receiving cup 3, so as to lock / unlock the housing 1, the powder receiving cup 3, and the cutter head seat 2. The housing 1 and the powder receiving cup 3 can be quickly assembled with the cutter head seat 2 through the first screwing structure and the second screwing structure. The first screwing structure and the second screwing structure axially connect the housing 1, the cutter head seat 2, and the powder receiving cup 3 into a whole in sequence. Then, the switch assembly locks the housing 1, the cutter head seat 2, and the powder receiving cup 3 to prevent the first screwing structure and the second screwing structure from loosening. On the contrary, during disassembly, the first screwing structure and the second screwing structure can be quickly unlocked through the switch assembly, so as to disassemble the housing 1, the powder receiving cup 3, and the cutter head seat 2, which is convenient for cleaning the cutter head assembly 4 on the cutter head seat 2 and can effectively improve the user experience.

[0026] An inner shell 21 is provided at the upper end of the cutter head seat 2. The inner shell 21 is concentrically arranged inside the shell 1, and a first screwing structure is arranged between the inner shell 21 and the shell 1; an adapter sleeve 22 is provided at the lower end of the cutter head seat 2. The adapter sleeve 22 is concentrically arranged inside the powder receiving cup 3, and a second screwing structure is arranged between the adapter sleeve 22 and the powder receiving cup 3. The shell 1 and the cutter head seat 2 form a rotational fit through the concentrically arranged inner shell 21, and the powder receiving cup 3 and the cutter head seat 2 form a rotational fit through the concentrically arranged adapter sleeve 22, so that the first screwing structure and the second screwing structure can realize the detachable connection between the shell 1, the powder receiving cup 3 and the cutter head seat 2 through rotation.

[0027] The first screwing structure includes a long guide groove 211, a first locking groove 212 and a first slider 11. The long guide groove 211 and the first locking groove 212 are arranged on the outer side wall of the inner shell 21. The long guide groove 211 is arranged vertically, and the first locking groove 212 is arranged horizontally at the lower end of the long guide groove 211; the first slider 11 is arranged inside the lower port of the shell 1. When the inner shell 21 is inserted from the lower port of the shell 1, the first slider 11 can be inserted along the long guide groove 211 and locked on the first locking groove 212. It should be noted that multiple groups of first screwing structures can be arranged between the inner shell 21 and the shell 1, so as to make the screwing connection more stable.

[0028] When the shell 1 is being installed, it is first sleeved on the inner shell 21 in the vertical direction. At this time, the first slider 11 slides along the long guide groove 211 to the first locking groove 212, and then the shell 1 and the cutter head seat 2 rotate relative to each other by a certain angle, so that the first slider 11 slides into the first locking groove 212 to form an axial mating connection. Further, reversing the above process can disassemble the shell 1 and the cutter head seat 2. It can be understood that the long guide groove 211 and the first locking groove 212 can also be arranged on the shell 1, and the first slider 11 is arranged on the inner shell 21, which can also achieve the above technical effects.

[0029] The second screwing structure includes a short guide groove 221, a second locking groove 222 and a second slider 31. The short guide groove 221 and the second locking groove 222 are arranged on the outer side wall of the adapter sleeve 22. The short guide groove 221 is arranged vertically, and the second locking groove 222 is arranged horizontally at the upper end of the short guide groove 221; the second slider 31 is arranged inside the upper port of the powder receiving cup 3. When the adapter sleeve 22 is inserted from the upper port of the powder receiving cup 3, the second slider 31 can be inserted along the short guide groove 221 and locked on the second locking groove 222. It should be noted that multiple groups of second screwing structures can be arranged between the adapter sleeve 22 and the powder receiving cup 3, so as to make the screwing connection more stable.

[0030] When the powder receiving cup 3 is installed, it is first sleeved on the matching sleeve 22 in the vertical direction. At this time, the second slider 31 slides along the short guide groove 221 to the second locking groove 222. Then, the powder receiving cup 3 rotates relative to the cutter head seat 2 by a certain angle, so that the second slider 31 slides into the second locking groove 222 to form an axial mating connection. Further, the above process can be reversed to disassemble the powder receiving cup 3 from the cutter head seat 2. It can be understood that the short guide groove 221 and the second locking groove 222 can be arranged on the powder receiving cup 3, and the second slider can be arranged on the matching sleeve 22, which can also achieve the above technical effects.

[0031] The switch assembly includes a first locking pin 23 and a second locking pin 24. A first locking hole 213 is provided between the cutter head seat 2 and the inner shell 21, and the first locking pin 23 is movably inserted through the first locking hole 213. A limiting rib 12 is provided at the lower port of the housing 1, and the first locking pin 23 cooperates with the first limiting rib 12 to lock / unlock the housing 1 and the cutter head seat 2 in the circumferential direction. A second locking hole 223 is provided between the cutter head seat 2 and the matching sleeve 22, and the second locking pin 24 is movably inserted through the second locking hole 223. A limiting groove 32 is provided at the upper port of the powder receiving cup 3, and the second locking pin 24 cooperates with the limiting groove 32 to lock / unlock the cutter head seat 2 and the powder receiving cup 3 in the circumferential direction. The first locking pin 23 can extend or retract into the first locking hole 213 to coincide with or be misaligned with the limiting rib 12, so as to lock / unlock the housing 1 and the cutter head seat 2 in the circumferential direction, enabling the housing 1 to be detachably connected to the cutter head seat 2 through the first snap structure. Similarly, the second locking pin 24 can extend or retract into the second locking hole 223, and when the second locking pin 24 is snapped into or slides out of the limiting groove 32, the powder receiving cup 3 and the cutter head seat 2 can be locked / unlocked in the circumferential direction, so that the powder receiving cup 3 can be detachably connected to the cutter head seat 2 through the second snap structure. It can be understood that the first locking pin 23 and the second locking pin 24 can be driven by the switch assembly respectively to achieve asynchronous driving. Preferably, the first locking pin 23 and the second locking pin 24 of the present invention are synchronously driven by the switch assembly, with a simpler overall structure and more convenient unlocking operation.

[0032] The switch assembly further includes a button 25 and a spring 26. An action cavity 201 is provided in the cutter head seat 2, and the first lock hole 213 and the second lock hole 223 communicate with the action cavity 201 respectively. The button 25 and the spring 26 are arranged in the action cavity 201, and the first lock pin 23 and the second lock pin 24 are fixedly connected to the button 25 respectively. A switch hole 202 is provided on the side wall of the cutter head seat 2, and the spring 26 abuts against the button 25 to make it protrude from the switch hole 202. Specifically, the spring 26 abuts against the inner end of the button 25, so that the outer end of the button 25 passes through and protrudes from the switch hole 202. At this time, the first lock pin 23 and the second lock pin 24 are respectively engaged with the limit rib 12 and the limit groove 32 to lock the housing 1 and the powder receiving cup 3 on the cutter head seat 2. The user can press the button 25 to drive the first lock pin 23 and the second lock pin 24 to synchronously retract into the first lock hole 213 and the second lock hole 223. At the same time, the user holds the cutter head seat 2 with one hand and can rotate the housing 1 or the powder receiving cup 3 with the other hand to disassemble them from the cutter head seat 2.

[0033] The hand-cranking assembly includes a handle 13, a first main shaft 14 and an output head 15. The first main shaft 14 is rotatably arranged in the housing 1, and the handle 13 is fixedly connected to the upper end of the first main shaft 14. The output head 15 is fixedly arranged at the lower end of the first main shaft 14. An input head 41 is provided on the cutter head assembly 4, and the output head 15 and the input head 41 are engaged with each other so that the hand-cranking assembly is in transmission connection with the cutter head assembly 4. The hand-cranking assembly constitutes a separable transmission connection through the output head 15 and the input head 41, so that when the housing 1 is separated from the cutter head seat 2, the cutter head assembly 4 can be disassembled as a whole for cleaning.

[0034] The cutter head assembly 4 includes a grinding sleeve 42, a second main shaft 43 and a grinding head 44. The second main shaft 43 is rotatably arranged in the inner housing 21, and the input head 41 is fixedly arranged at the upper end of the second main shaft 43. The grinding sleeve 42 is arranged in the cutter head seat 2, and the grinding head 44 is rotatably arranged in the grinding sleeve 42, and the grinding head 44 is fixed to the lower end of the second main shaft 43 through a limit seat 45. The above-mentioned handle 13 drives the input head 41 and the second main shaft 43 to rotate through the first main shaft 14 and the output head 15, so that the grinding head 44 and the grinding sleeve 42 rotate relative to each other to realize the grinding process of coffee beans. Preferably, the grinding head 44 is installed at the lower end of the second main shaft 43 through the limit seat 45, and the limit seat 45 is threadedly connected to the second main shaft 43, so that the grinding head 44 can be disassembled from the cutter head seat 2 for cleaning.

[0035] The cutter head assembly 4 further includes an adjustment knob 46. The adjustment knob 46 is connected to the cutter head seat 2 in a threaded manner and is paired with the grinding sleeve 42. The adjustment knob 46 can adjust the gap between the grinding sleeve 42 and the grinding head 44, thereby adjusting the particle size of the ground coffee powder. It can be understood that the adjustment knob 46 adjusts the stroke of the grinding sleeve 42 by tightening and loosening the thread. Further, the grinding sleeve 42 can be detached through the adjustment knob 46, so that the entire cutter head assembly 4 can be cleaned, which is convenient for users.

[0036] The above description is only the preferred embodiment of the present invention. Therefore, all equivalent changes or modifications made according to the structure, features, and principles described in the scope of the patent application of the present invention are included in the scope of the patent application of the present invention.

Claims

1. A hand-cranked coffee grinder with a double locking mechanism, comprising a housing (1), a cutter head seat (2), and a powder receiving cup (3) arranged in sequence. A hand-cranking assembly is provided on the housing (1), and a cutter head assembly (4) is provided on the cutter head seat (2); characterized in that, the cutter head seat (2) is detachably connected to the housing (1) through a first screw-fastening structure, and the powder receiving cup (3) is detachably connected to the cutter head seat (2) through a second screw-fastening structure; a switch assembly is provided on the cutter head seat (2), and the switch assembly is respectively connected to the housing (1) and the powder receiving cup (3), so as to lock / unlock the housing (1), the powder receiving cup (3) and the cutter head seat (2).

2. The hand-cranked coffee grinder with a double locking mechanism according to claim 1, wherein, An inner housing (21) is provided at the upper end of the cutter head seat (2), and the inner housing (21) is concentrically arranged inside the housing (1). The first screw-fastening structure is arranged between the inner housing (21) and the housing (1); an adapter sleeve (22) is provided at the lower end of the cutter head seat (2), and the adapter sleeve (22) is concentrically arranged inside the powder receiving cup (3). The second screw-fastening structure is arranged between the adapter sleeve (22) and the powder receiving cup (3).

3. The hand-cranked coffee grinder with a double locking mechanism according to claim 2, wherein, The first screw-fastening structure includes a long guide groove (211), a first locking groove (212), and a first sliding block (11). The long guide groove (211) and the first locking groove (212) are arranged on the outer side wall of the inner housing (21). The long guide groove (211) is arranged vertically, and the first locking groove (212) is arranged horizontally at the lower end of the long guide groove (211); the first sliding block (11) is arranged inside the lower port of the housing (1). When the inner housing (21) is inserted from the lower port of the housing (1), the first sliding block (11) can be inserted along the long guide groove (211) and locked on the first locking groove (212).

4. The hand-cranked coffee grinder with double latches according to claim 2, wherein The second screw-fastening structure includes a short guide groove (221), a second locking groove (222), and a second sliding block (31). The short guide groove (221) and the second locking groove (222) are arranged on the outer side wall of the adapter sleeve (22). The short guide groove (221) is arranged vertically, and the second locking groove (222) is arranged horizontally at the upper end of the short guide groove (221); the second sliding block (31) is arranged inside the upper port of the powder receiving cup (3). When the adapter sleeve (22) is inserted from the upper port of the powder receiving cup (3), the second sliding block (31) can be inserted along the short guide groove (221) and locked on the second locking groove (222).

5. The hand-cranked coffee grinder with a double-locking mechanism according to claim 1, wherein, The switch assembly includes a first locking pin (23) and a second locking pin (24). A first locking hole (213) is provided between the cutter head seat (2) and the inner housing (21), and the first locking pin (23) is movably inserted through the first locking hole (213); a limiting rib (12) is provided inside the lower port of the housing (1), and the first locking pin (23) cooperates with the first limiting rib (12) to lock / unlock the housing (1) and the cutter head seat (2) in the circumferential direction; a second locking hole (223) is provided between the cutter head seat (2) and the adapter sleeve (22), and the second locking pin (24) is movably inserted through the second locking hole (223). A limiting groove (32) is provided inside the upper port of the powder receiving cup (3), and the second locking pin (24) cooperates with the limiting groove (32) to lock / unlock the cutter head seat (2) and the powder receiving cup (3) in the circumferential direction.

6. The hand-cranked coffee grinder with a double latch according to claim 5, wherein, The switch assembly further includes a button (25) and a spring (26). An action chamber (201) is provided in the cutter head seat (2), and a first locking hole (213) and a second locking hole (223) communicate with the action chamber (201) respectively. The button (25) and the spring (26) are arranged in the action chamber (201), and a first locking pin (23) and a second locking pin (24) are fixedly connected to the button (25) respectively. A switch hole (202) is provided on the side wall of the cutter head seat (2), and the spring (26) abuts against the button (25) to make it protrude from the switch hole (202).

7. The hand-cranked coffee grinder with a double-locking mechanism according to claim 1, characterized in that, The hand-cranking assembly includes a handle (13), a first main shaft (14) and an output head (15). The first main shaft (14) is rotatably arranged in the housing (1), and the handle (13) is fixedly connected to the upper end of the first main shaft (14). The output head (15) is fixedly arranged at the lower end of the first main shaft (14). An input head (41) is provided on the cutter head assembly (4), and the output head (15) meshes with the input head (41) so that the hand-cranking assembly is in transmission connection with the cutter head assembly (4).

8. The hand-cranked coffee grinder with a double-locking mechanism according to claim 7, wherein The cutter head assembly (4) includes a grinding sleeve (42), a second main shaft (43) and a grinding head (44). The second main shaft (43) is rotatably arranged in the inner housing (21), and the input head (41) is fixedly arranged at the upper end of the second main shaft (43). The grinding sleeve (42) is arranged in the cutter head seat (2), and the grinding head (44) is rotatably arranged in the grinding sleeve (42), and the grinding head (44) is fixed to the lower end of the second main shaft (43) through a limit seat (45).

9. The hand-cranked coffee grinder with a double latch according to claim 8, wherein, The cutter head assembly (4) further includes an adjusting knob (46). The adjusting knob (46) is in threaded cooperation with the cutter head seat (2), and the adjusting knob (46) is paired and connected with the grinding sleeve (42).

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