CN219538107U - Portable hand bean grinder - Google Patents

Abstract

The utility model discloses a portable hand-operated bean grinder, which comprises a bean grinder main body and a handle, wherein the bean grinder main body comprises a bean bin with an opening structure at the upper end and the lower end, a grinding assembly and a transmission rod for driving the grinding assembly to move are arranged in the bean bin, the bean grinder main body also comprises a cover body for covering the opening position at the upper end of the Yu Dou bin, the cover body is connected with the upper end of the transmission rod in a covering state, and simultaneously the cover body can rotate relative to the opening position of the bean bin and drive the transmission rod to rotate, and the handle is detachably connected with the cover body. According to the hand-operated bean grinder disclosed by the utility model, the cover body is arranged at the opening position of the bean bin, the handle is detachably connected with the cover body, when the hand-operated bean grinder is not used, the handle can be detached from the cover body, and then the handle is vertically overlapped outside the bean bin, so that the size of the bean grinder can be reduced, and the hand-operated bean grinder is convenient to carry and store.

Description

Portable hand bean grinder

Technical Field

The utility model belongs to the technical field of grinding tools, and particularly relates to a portable hand-operated bean grinder.

Background

The utility model provides a hand mill beans ware is a manual grinding tool for grinding coffee beans, and current hand mill beans ware's structure includes open-top's beans storehouse, can dismantle the powder storehouse of connecting in beans storehouse bottom, locates the grinding component in the beans storehouse and is used for driving the transfer line of grinding component motion to and the handle of being connected with the transfer line upper end, and the beans storehouse is linked together with the powder storehouse. When the coffee grinder is used, coffee beans are poured into the bean bin from the opening position of the bean bin, then the handle is pushed by hands to drive the transmission rod to rotate, so that the transmission rod can drive the grinding assembly to move to grind the coffee beans, the coffee beans automatically fall into the powder bin after being ground into powder, the bean grinding operation can be completed, and finally the powder bin is detached, so that coffee powder can be taken out to brew coffee, and the coffee grinder is convenient to operate.

However, the existing hand-operated bean grinder has the defects that the handle of the existing hand-operated bean grinder cannot be detached independently, so that the whole size of the bean grinder is large, and the carrying and storage of the bean grinder are inconvenient.

Disclosure of Invention

Aiming at the defects of the prior art, the utility model aims to provide a portable hand-operated bean grinder.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a portable hand mill beans ware, including mill beans ware main part and handle, mill beans ware main part includes hollow structure's beans storehouse, is equipped with grinding component in the beans storehouse and is used for driving the transfer line of grinding component motion, foretell mill beans ware main part still including the lid that covers Yu Dou storehouse upper end open position, the lid is connected with the transfer line upper end under the lid closes the state, and the lid can be rotated and drive the transfer line rotation relative beans storehouse open position simultaneously, foretell handle can dismantle with the lid and be connected.

In the above scheme, through being equipped with the lid in beans storehouse open position, and the handle can dismantle with the lid and be connected, when not using, can dismantle the handle from the lid, then vertically fold the handle in the beans storehouse outside, just so can reduce the volume of grinding the beans ware, make things convenient for carrying and depositing of hand mill beans ware. When the coffee beans need to be ground, the cover body is firstly opened, the coffee beans are poured into the bean bin, then a container for containing the bean powder is placed below the bean bin, the handle is connected with the cover body, the cover body covers the opening position of the Yu Dou bin, meanwhile, the cover body is connected with the upper end of the transmission rod, and finally the handle is pushed by hands to rotate, the cover body and the transmission rod are driven to rotate when the handle rotates, so that the transmission rod drives the grinding assembly to grind the coffee beans, and the coffee beans can fall into the container after being ground into powder, and then the bean grinding operation can be completed.

Further, the side wall of the cover body is provided with the first jack, the front end of the handle is inserted into the first jack and buckled with the first jack, so that the handle and the cover body can be connected, and when the handle needs to be disassembled, the handle can be pulled out of the first jack by force, and the handle can be taken out and is convenient to disassemble and assemble.

Further, the side wall of the first jack is provided with a bulge, the front end of the handle is provided with a first buckling hole corresponding to the bulge, when the handle is inserted into the first jack of the cover body, the bulge is matched with the first buckling hole, so that the mounting stability of the handle can be improved, the handle is prevented from being naturally separated from the first jack, and the handle is more convenient to push.

Further, the side wall of the first jack is provided with a first accommodating groove, a first spring is arranged in the first accommodating groove, the protrusion is a first marble arranged in the first accommodating groove, and the first spring can push the first marble to be exposed out of the notch of the first accommodating groove in a natural state. When the handle is installed, when the front end face of the handle is in conflict with the first marble, the front end face of the handle can push the first marble to downwards compress the first spring so that the first marble is retracted into the first accommodating groove, the first marble can not prevent the handle from being continuously inserted into the first jack forwards, and when the handle is inserted into the first buckling hole to be aligned with the first marble, the first spring can push the first marble to be semi-exposed out of the notch of the first accommodating groove and matched with the first buckling hole, so that the handle is locked, and the installation stability of the handle is improved. The handle is pushed by force, the handle can push the first marble to retract into the first accommodating groove, and the handle can be separated from the first jack and detached.

Further, the outside of the bean bin is provided with the buckling position buckled with the side wall of the handle, when the handle is detached from the cover body, the handle can be vertically buckled in the buckling position, so that the handle can be fixed on the outside of the bean grinder main body, the handle is prevented from being lost, and the hand-operated bean grinder is more convenient to carry and store.

Further, the anti-skidding sleeve is sleeved outside the bean bin, the anti-skidding sleeve can play a role in skid prevention, the phenomenon that a user slides by hand when holding the bean bin is avoided, and bean grinding is more convenient. In addition, the buckling position is a second jack formed in the upper side wall of the anti-skidding sleeve, when the handle is detached from the cover body, the front end of the handle can be inserted into the second jack, the handle can be vertically buckled at the outer side of the bean grinder body, the plugging is stable, and the disassembly and the assembly are convenient and quick.

Further, the connecting hole is formed below the cover body, the plug is arranged at the upper end of the transmission rod, the cross sections of the connecting hole and the plug are of a polygonal structure which are matched with each other, and when the cover body is in a covering state, the plug of the transmission rod is inserted into the connecting hole of the cover body, so that the cover body can be connected with the transmission rod, and the transmission rod can be driven to rotate while the cover body is rotated.

Further, the connecting hole penetrates through the inner side of the first jack, the front end of the handle is provided with the second buckling hole, and when the cover body is in a covering state and the front end of the handle is inserted into the first jack, the upper end of the transmission rod penetrates through the connecting hole to be matched with the second buckling hole. After the upper end of the transmission rod is matched with the second buckling hole, the handle can be locked better, the handle cannot be separated from the first jack in the cover body covering state, and the installation stability of the handle is guaranteed. When the handle is required to be disassembled, the cover body is required to be lifted up firstly, so that after the second buckling hole of the handle is separated from the upper end of the transmission rod, the handle is stirred by force at the moment, and after the first buckling hole is separated from the first marble, the handle can be disassembled.

Further, the connecting hole side wall is provided with a second accommodating groove, a second spring and a second marble are arranged in the second accommodating groove, the second spring can push the second marble to be exposed out of the notch of the second accommodating groove in a natural state, the plug side wall is provided with an annular groove, when the cover body is in a covering state, the plug of the transmission rod is arranged in the connecting hole, the position of the annular groove is aligned with the position of the second marble, and the second marble exposed out of the notch of the second accommodating groove is matched with the annular groove, so that the cover body can be locked in a covering state, and the covering stability of the cover body is improved. When the cover body needs to be opened, the cover body needs to be pulled upwards with force, so that the side wall of the plug pushes the second marble to compress the second spring, the second marble is retracted into the second accommodating groove, and after the annular groove of the plug is separated from the second marble, the connecting hole of the cover body can be separated from the plug of the transmission rod, so that the cover body opening operation is completed.

Further, the bean grinder main body further comprises a powder bin with an opening structure at the upper end, and the outer side of the opening part of the powder bin is in threaded connection with the inner side of the lower end of the bean bin. When the coffee bean grinder is used, after the coffee beans are ground into powder by the grinding component, the coffee powder automatically falls into the powder bin, and after all the coffee beans are ground, the powder bin can be screwed to be separated from the bean bin, so that the coffee powder in the powder bin can be conveniently poured out. According to the scheme, after the powder bin is additionally arranged, a container is not required to be additionally searched for holding coffee powder, and the bean grinding operation is more convenient.

The handle of the hand-operated bean grinder can be detached from the cover body independently, so that the volume of the hand-operated bean grinder can be reduced, and the hand-operated bean grinder is convenient to carry and store. And when the handle is connected with the cover body, the upper end of the transmission rod is matched with the second buckling hole of the handle, so that the mounting stability of the handle and the cover body can be ensured. And after the handle is disassembled, the handle can be vertically inserted into the second jack, so that the handle can be fixed on the outer side of the bean grinder body, the handle is prevented from being lost, and the hand-operated bean grinder is more convenient to carry and store. In addition, the lid passes through the annular groove lock of second marble and transfer line to can guarantee the installation stability of lid, and the antiskid cover can avoid the user to appear hand smooth phenomenon when holding the beans storehouse, make the bean grinding operation can be more convenient.

Drawings

Fig. 1 is a schematic diagram of a structure in which a handle of a portable hand-operated bean grinder according to an embodiment of the present utility model is inserted into a second insertion hole.

Fig. 2 is a schematic diagram of a structure in which a handle of a portable hand-operated bean grinder according to an embodiment of the present utility model is inserted into a first insertion hole.

Fig. 3 is an exploded view of a portable hand-operated bean grinder according to an embodiment of the present utility model.

Fig. 4 is a schematic diagram of a cover structure according to an embodiment of the utility model.

Fig. 5 is a cross-sectional view of a bean grinder body according to an embodiment of the present utility model.

Fig. 6 is an enlarged view of a portion a in fig. 5.

Fig. 7 is a schematic diagram illustrating an assembly structure of a transmission rod and a polishing assembly according to an embodiment of the present utility model.

Wherein reference numerals are as follows:

1. a bean grinder body; 11. a bean bin; 12. a powder bin; 13. a cover body; 130. a first jack; 1301. a protrusion; 1302. a first accommodation groove; 1303. a first spring; 131. a connection hole; 1311. a second accommodation groove; 1312. a second spring; 1313. a second marble; 2. a handle; 21. a first button hole; 22. a second button hole; 23. a handle head; 3. a transmission rod; 31. a plug; 310. an annular groove; 4. a grinding assembly; 41. a first cutterhead; 42. the second cutterhead; 5. an anti-skid sleeve; 51. and a second jack.

Detailed Description

The drawings are for illustrative purposes only and are not to be construed as limiting the present patent; for the purpose of better illustrating the embodiments, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the actual product dimensions; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationship depicted in the drawings is for illustrative purposes only and is not to be construed as limiting the present patent.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there are orientations or positional relationships indicated by terms "upper", "lower", "left", "right", "long", "short", etc., based on the orientations or positional relationships shown in the drawings, this is merely for convenience in describing the present utility model and simplifying the description, and is not an indication or suggestion that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so that the terms describing the positional relationships in the drawings are merely for exemplary illustration and are not to be construed as limitations of the present patent, and that it is possible for those of ordinary skill in the art to understand the specific meaning of the terms described above according to specific circumstances.

The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:

example 1

As shown in fig. 1, 2 and 3, the present embodiment provides a portable hand-operated bean grinder, including a bean grinder body 1 and a handle 2, the bean grinder body 1 includes a hollow bean bin 11, a cover 13 covering an opening position of an upper end of the Yu Dou bin 11, and a powder bin 12 having an opening structure at an upper end, the bean bin 11 and the powder bin 12 are cylindrical structures, as shown in fig. 5 and 7, an outside of an opening of the powder bin 12 is in threaded connection with an inside of a lower end of the bean bin 11, a grinding assembly 4 and a driving rod 3 for driving the grinding assembly 4 to move are disposed in the bean bin 11, wherein the driving rod 3 is rotatably connected to a center position of the bean bin 11, the grinding assembly 4 includes a six-claw cutter 41 connected to a lower end of the driving rod 3, and an annular cutter 42 fixed to an inside of the bean bin 11, the six-claw cutter 41 is rotated simultaneously, a gap larger than a volume of coffee bean is reserved between the six-claw cutter 41 and the annular cutter 42, and a gap for allowing coffee powder to flow out from a lower end between the six-claw cutter 41 and the annular cutter 42 is reserved. When grinding coffee beans, the coffee beans can enter the space between the six-claw cutter 41 and the annular cutter 42 from the upper end gap between the six-claw cutter 41 and the annular cutter 42, and then the driving rod 3 is rotated to drive the six-claw cutter 41 to rotate, so that the coffee beans can be ground into coffee powder, and the coffee powder can automatically flow out of the space between the six-claw cutter 41 and the annular cutter 42 to the powder bin 12.

As shown in fig. 2 and 3, the cover 13 is connected with the upper end of the transmission rod 3 in the covering state, and the cover 13 can rotate relative to the opening position of the bean bin 11 and drive the transmission rod 3 to rotate. The handle 2 is detachably connected with the cover 13, the side wall of the cover 13 is provided with the first jack 130, the handle head 23 is arranged on the rear end of the handle 2, so that the handle 2 can be more conveniently held, and the front end of the handle 2 is inserted into the first jack 130 and buckled with the first jack 130.

When the hand-operated bean grinder of this embodiment is used, when coffee beans need to be ground, the cover 13 can be opened first, the coffee beans are poured into the bean bin 11 from the upper end opening of the bean bin 11, then the front end of the handle 2 is inserted into the first insertion hole 130 of the cover 13, as shown in fig. 2, the handle 2 is connected with the cover 13, the cover 13 is covered at the opening position of the Yu Dou bin 11, meanwhile, the cover 13 is connected with the upper end of the transmission rod 3, finally, the handle head 23 is held by hand to push the handle 2 to rotate, the cover 13 is driven to rotate while the handle 2 rotates, so that the transmission rod 3 and the six-jaw cutter 41 are driven to rotate to grind the coffee beans, the coffee beans can fall into the powder bin 12 after grinding into powder, after all the coffee beans are ground, the powder bin 12 can be screwed down, so that the coffee powder can be poured out of the opening of the powder bin 12. When the coffee beans do not need to be ground, the handle 2 can be pulled out of the first jack 130 by force, so that the handle 2 is detached from the cover 13, and the coffee beans are convenient to store and carry.

The handle 2 and the cover 13 of the hand-operated bean grinder of the embodiment are detachably connected, when the hand-operated bean grinder is not used, the handle 2 can be detached, and then the handle 2 is vertically overlapped on the outer side of the bean bin 11, so that the volume of the hand-operated bean grinder can be reduced, and the hand-operated bean grinder is convenient to carry and store.

Example two

The improvement of this embodiment is based on the structure of the portable hand-operated bean grinder of the first embodiment, and is that, as shown in fig. 3, 5 and 6, the lower side wall of the first jack 130 is provided with a protrusion 1301, the front end of the handle 2 is provided with a first fastening hole 21 corresponding to the protrusion 1301, when the handle 2 is inserted into the first jack 130 of the cover 13, the protrusion 1301 is matched with the first fastening hole 21, so that the handle 2 is fastened in the first jack 130, thereby improving the installation stability of the handle 2, preventing the handle 2 from being naturally separated from the first jack 130, and being more convenient to push the handle 2.

As shown in fig. 6, the lower side wall of the first jack 130 is provided with a first accommodating groove 1302, a first spring 1303 is provided in the first accommodating groove 1302, the protrusion 1301 is a first marble provided in the first accommodating groove 1302, two ends of the first spring 1303 respectively contact with the groove bottom of the first accommodating groove 1302 and the first marble, and when the first spring 1303 is in a natural state, the first marble is pushed to be exposed out of the groove opening of the first accommodating groove 1302. When the handle 2 is installed, when the front end surface of the handle 2 is inserted into the first jack 130 and abuts against the first marble, the front end surface of the handle 2 pushes the first marble to compress the first spring 1303 downwards, so that the first marble is retracted into the first accommodating groove 1302, the first marble does not obstruct the handle 2 from being inserted into the first jack 130 continuously, and when the handle 2 is inserted into the first buckling hole 21 and the first marble aligning position, the first spring 1303 pushes the first marble to be exposed out of the notch of the first accommodating groove 1302 and matched with the first buckling hole 21, thereby locking the handle 2 and improving the installation stability of the handle 2. When the handle 2 needs to be disassembled, the handle 2 must be pulled with force, so that the handle 2 pushes the first marble to retract into the first accommodating groove 1302 again, and the handle 2 can be pulled out of the first jack 130 only after the first button hole 21 is separated from the first marble, so that the handle 2 is disassembled.

As an improvement scheme of this embodiment, as shown in FIG. 1, the outside of the bean bin 11 is provided with a buckling position buckled with the side wall of the handle 2, when the handle 2 is detached from the cover 13, the handle 2 can be vertically buckled in the buckling position, so that the handle 2 can be fixed on the outside of the bean grinder body 1, the handle 2 is prevented from being lost, and the hand-operated bean grinder is more convenient to carry and store. In addition, the outside cover of foretell beans storehouse 11 is equipped with antiskid cover 5, and antiskid cover 5 can play anti-skidding effect, avoids the user to appear the hand phenomenon of sliding when holding beans storehouse 11, holds steadily admittedly, and it can be more convenient to grind beans like this. Wherein, foretell knot position is for seting up in the second jack 51 of antiskid cover 5 upper side wall, after dismantling handle 2 from lid 13, can insert handle 2 front end in second jack 51, can be with handle 2 vertical lock in the beans mill main part 1 outside position, and handle 2 cartridge is stable, easy dismounting is swift again.

Example III

The improvement of this embodiment is based on the structure of the portable hand-operated bean grinder of the second embodiment, and is that, as shown in fig. 3, 4, 5 and 6, a connecting hole 131 is formed below the cover 13, a plug 31 is disposed at the upper end of the driving rod 3, the cross sections of the connecting hole 131 and the plug 31 are polygonal structures that are matched with each other, wherein, the cross sections of the connecting hole 131 and the plug 31 are preferably hexagonal structures, and when the cover 13 is in a closed state, the plug 31 of the driving rod 3 is inserted into the connecting hole 131 of the cover 13, so that the cover 13 and the driving rod 3 can be connected, and the driving rod 3 can be driven to rotate while the cover 13 is rotated.

As shown in fig. 3 and 6, in order to ensure the mounting stability of the handle 2, the connecting hole 131 penetrates through the inner side of the first jack 130, the front end of the handle 2 is provided with the second fastening hole 22, and when the cover 13 is in the covering state and the front end of the handle 2 is inserted into the first jack 130, the upper end of the driving rod 3 passes through the connecting hole 131 to be matched with the second fastening hole 22 of the handle 2, so that the handle 2 can be better locked, the handle 2 cannot be separated from the first jack 130 in the covering state of the cover 13, and the mounting stability of the handle 2 is ensured. When the handle 2 needs to be disassembled, the cover 13 must be lifted up first, so that after the second buckling hole 22 of the handle 2 is separated from the upper end of the transmission rod 3, the handle 2 is pulled by force at the moment, and after the first buckling hole 21 is separated from the first marble, the handle 2 can be pulled out of the first jack 130, so that the handle 2 is disassembled.

In addition, in order to improve the stability of the lid 13, as shown in fig. 3 and 6, the side wall of the connecting hole 131 is provided with a second accommodating groove 1311, a second spring 1312 and a second marble 1313 are disposed in the second accommodating groove 1311, and two ends of the second spring 1312 respectively abut against the bottom of the second accommodating groove 1311 and the second marble 1313, so that the second spring 1312 pushes the second marble 1313 to be exposed outside the notch of the second accommodating groove 1311 in a natural state. As shown in fig. 7, the outer side wall of the plug 31 is provided with the annular groove 310, when the cover 13 is in the closed state, the plug 31 of the driving rod 3 is disposed in the connecting hole 131, and the position of the annular groove 310 of the plug 31 is aligned with the position of the second marble 1313, and at this time, the second spring 1312 pushes the second marble 1313 to be exposed out of the notch of the second accommodating groove 1311 and to be matched with the annular groove 310, so that the cover 13 can be locked in the closed state, and the closing stability of the cover 13 is improved. When the cover 13 needs to be opened, the cover 13 must be pulled up by force, so that the side wall of the plug 31 pushes the second marble 1313 to compress the second spring 1312, so that the second marble 1313 is retracted into the second accommodating groove 1311, and the annular groove 310 of the plug 31 is separated from the second marble 1313, and then the connection hole 131 of the cover 13 is separated from the plug 31 of the transmission rod 3, thereby completing the opening operation of the cover 13. As shown in fig. 4, the second housing groove 1311, the second spring 1312, and the second marble 1313 may be provided in plural numbers in this embodiment, so that the closing stability of the lid 13 can be further improved.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The utility model provides a portable hand mill beans ware, includes mill beans ware main part (1) and handle (2), grinds beans ware main part (1) and includes hollow structure's beans storehouse (11), is equipped with grinding component (4) and is used for driving transmission pole (3) of grinding component (4) motion in beans storehouse (11), its characterized in that: the bean grinder main body (1) also comprises a cover body (13) covering the opening position of the upper end of the Yu Doucang (11), the cover body (13) is connected with the upper end of the transmission rod (3) in a covering state, meanwhile, the cover body (13) can rotate relative to the opening position of the bean bin (11) and drive the transmission rod (3) to rotate, and the handle (2) is detachably connected with the cover body (13).

2. The portable hand-operated bean grinder of claim 1, wherein: the side wall of the cover body (13) is provided with a first jack (130), and the front end of the handle (2) is inserted into the first jack (130) and buckled with the first jack (130).

3. The portable hand-operated bean grinder of claim 2, wherein: the side wall of the first jack (130) is provided with a bulge (1301), the front end of the handle (2) is provided with a first buckling hole (21) corresponding to the bulge (1301), and when the handle (2) is inserted into the first jack (130) of the cover body (13), the bulge (1301) is matched with the first buckling hole (21).

4. A portable hand-operated bean grinder as claimed in claim 3, wherein: the side wall of the first jack (130) is provided with a first accommodating groove (1302), a first spring (1303) is arranged in the first accommodating groove (1302), the bulge (1301) is a first marble arranged in the first accommodating groove (1302), and the first spring (1303) can push the first marble to be exposed out of a notch of the first accommodating groove (1302) in a natural state.

5. The portable hand-operated bean grinder of claim 2, wherein: the outside of the bean bin (11) is provided with a buckling position buckled with the side wall of the handle (2), and the handle (2) can be vertically buckled in the buckling position.

6. The portable hand-operated bean grinder of claim 5, wherein: the outside of the bean bin (11) is sleeved with an anti-skid sleeve (5), and the buckling position is a second jack (51) arranged on the upper side wall of the anti-skid sleeve (5).

7. The portable hand-operated bean grinder according to any one of claims 2-6, wherein: the cover body (13) below set up connecting hole (131), the upper end of transfer line (3) is equipped with plug (31), the cross section of connecting hole (131) and plug (31) is the polygon structure of mutually supporting, when cover body (13) under the lid state, in connecting hole (131) of transfer line (3) insert cover body (13).

8. The portable hand-operated bean grinder of claim 7, wherein: the connecting hole (131) is communicated with the inner side of the first jack (130), the front end of the handle (2) is provided with the second buckling hole (22), and when the cover body (13) is in a covering state and the front end of the handle (2) is inserted into the first jack (130), the upper end of the transmission rod (3) penetrates through the connecting hole (131) to be matched with the second buckling hole (22).

9. The portable hand-operated bean grinder of claim 7, wherein: the side wall of the connecting hole (131) is provided with a second accommodating groove (1311), a second spring (1312) and a second marble (1313) are arranged in the second accommodating groove (1311), the second spring (1312) pushes the second marble (1313) to be semi-exposed out of a notch of the second accommodating groove (1311) in a natural state, the side wall of the plug (31) is provided with an annular groove (310), and when the cover body (13) is in a covering state, the second marble (1313) which is semi-exposed out of the notch of the second accommodating groove (1311) is matched with the annular groove (310).

10. The portable hand-operated bean grinder of claim 1, wherein: the bean grinder main body (1) also comprises a powder bin (12) with an opening structure at the upper end, and the outside of the opening part of the powder bin (12) is in threaded connection with the inside of the lower end of the bean bin (11).