Portable bean grinder

Abstract

The utility model discloses a portable bean grinder, which belongs to the field of food processing equipment and comprises a main machine body and a powder receiving bin, a grinding cavity and a grinding core are arranged in the main machine body, the grinding core is connected with a driving source, the grinding cavity comprises a grinding disc, and a grinding gap is formed between the outer wall of the grinding core and the inner wall of the grinding disc. A material is ground through the grinding gap and then enters a powder receiving bin located below the grinding core, an outer adjusting ring is arranged on the peripheral side of the main machine body and located between the main machine body and the powder receiving bin, and the outer adjusting ring is used for driving the grinding disc to move in the axial direction so as to adjust the size of the grinding gap. The portable bean grinder further comprises a bottom connecting ring fixed relative to the main machine body, the powder receiving bin is connected with the bottom connecting ring in a sealed mode, the bottom connecting ring is provided with an abutting protruding part used for abutting against the powder receiving bin, and when the top of the powder receiving bin abuts against the abutting protruding part, a gap is reserved between the outer adjusting ring and the powder receiving bin. The utility model has the advantages that the internal structural design is optimized, so that the external adjusting function is smoother.

Description

[Technical field]

[0001] The utility model relates to a portable bean grinder, belonging to the field of food processing equipment, in particular to the field of grinding processing. [Background technology]

[0002] As people's living standards improve, their requirements for food are getting higher and higher, especially modern people are becoming more and more fond of coffee drinks. For senior coffee lovers, they prefer freshly ground coffee. Freshly ground coffee usually requires grinding coffee beans into powder. At present, most of the coffee beans on the market are ground using desktop coffee machines. However, desktop coffee machines are inconvenient to carry and cannot meet the needs of brewing coffee during daily travel. Therefore, portable bean grinders are gradually beginning to appear on the market. This type of portable bean grinder can be held directly by the user and is easy to carry like a water cup.

[0003] Most of the portable coffee bean grinders currently on the market have a main structure including a main body and a powder receiving bin connected to the main body. The main body is provided with a grinding chamber and a grinding core arranged in the grinding chamber. The grinding core is connected to a driving source. The driving source of most of the current portable coffee bean grinders is basically a driving motor. The grinding chamber includes a grinding disk. A grinding gap is formed between the outer wall of the grinding core and the inner wall of the grinding disk. The coffee beans enter the powder receiving bin after being ground in the grinding gap.

[0004] The size of coffee powder particles will affect the brewing taste of coffee. At the same time, different coffee bean particle sizes also need to match different grinding gaps. Therefore, people are also in urgent need of setting a function that can adjust the grinding gap on portable grinders. However, most of the current portable grinders usually have a built-in adjustment of the grinding gap, which makes it inconvenient for users to adjust. Sometimes the powder receiving bin needs to be disassembled to achieve it. Therefore, the applicant also developed and designed an externally adjusted grinder in the early stage, such as disclosed in CN 218474502 U, but the structure still needs to be improved, and the smoothness of the external adjustment also needs to be optimized. [Contents of the utility model]

[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a portable coffee grinder, optimize the internal structure design, and make the external adjustment function smoother.

[0006] To solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A portable coffee bean grinder comprises a main body and a powder receiving bin connected to the main body, the main body being provided with a grinding chamber and a grinding core arranged in the grinding chamber, the grinding core being connected to a driving source, the grinding chamber being provided with a grinding disc, a grinding gap being formed between an outer wall of the grinding core and an inner wall of the grinding disc, and the material enters the powder receiving bin located below the grinding core after being ground in the grinding gap, an outer adjusting ring being provided on the outer peripheral side of the main body, the outer adjusting ring being located between the main body and the powder receiving bin, the outer adjusting ring being used to drive the grinding disc to move axially to adjust the size of the grinding gap, the portable coffee bean grinder also comprising a bottom connecting ring fixed relatively to the main body, the powder receiving bin being sealingly connected to the bottom connecting ring, the bottom connecting ring being provided with an abutting convex portion for abutting against the powder receiving bin, and when the top of the powder receiving bin abuts against the abutting convex portion, a gap is left between the outer adjusting ring and the powder receiving bin.

[0008] The beneficial effects of adopting the utility model are:

[0009] Since the outer adjustment ring is located between the main body and the powder receiving bin, and the powder receiving bin is at the bottom, under this design, the matching relationship between the outer adjustment ring and the powder receiving bin becomes very important. Under the influence of their own weight, the outer adjustment ring and the powder receiving bin cannot be too tightly matched, which may easily lead to a large friction between the two, nor can they be too loose, otherwise the powder receiving bin will easily fall off, or users sometimes even simply fit the outer adjustment ring and the powder receiving bin tightly and rotate them at the same time, but this adjustment experience is not good.

[0010] The utility model arranges a bottom connecting ring on the main body. After the bottom connecting ring is arranged, the powder receiving bin can be directly and tightly matched with the bottom connecting ring without the need for a connection relationship with the outer adjustment ring. After they are separated from each other, the structural design of the outer adjustment ring reduces the friction resistance from the powder receiving bin, and does not need to rotate simultaneously with the powder receiving bin, so the adjustment is smoother. Moreover, such a design also reduces the manufacturing requirements for the outer adjustment ring, and it does not need to consider the matching relationship with the powder receiving bin, and the manufacturing precision requirements are lower.

[0011] At the same time, the bottom connecting ring in the utility model is provided with an abutting convex portion, and the abutting convex portion is mainly used to limit the powder receiving bin. When the powder receiving bin is assembled to the main body, the top of the powder receiving bin abuts against the abutting convex portion. When the top of the powder receiving bin abuts against the abutting convex portion, a gap is still retained between the outer adjustment ring and the powder receiving bin. The gap referred to here means that there is a gap fit relationship between the outer adjustment ring and the powder receiving bin, which can further ensure that the outer adjustment ring does not generate friction with the powder receiving bin during the rotation adjustment process.

[0012] In addition, since the powder receiving bin is a component that often needs to be removed and reassembled, it was found during testing and actual use that when users are assembling, in order to ensure that the powder receiving bin does not fall off the main body, they often apply a large force to the powder receiving bin, and even knock on the powder receiving bin to ensure the stability of the connection with the main body. The design of the abutment convex portion can reduce the impact of the user on the outer adjustment ring during the assembly of the powder receiving bin to a certain extent, because the outer adjustment ring is a relatively precise component. If it is subjected to too much extrusion and impact, it is easy to cause problems such as poor adjustment accuracy. Therefore, the design of the abutment convex portion can also help increase the use accuracy and service life of the outer adjustment ring.

[0013] Preferably, the bottom connecting ring is located below the outer adjusting ring, and a locking piece for locking the outer adjusting ring is provided on a side of the bottom connecting ring facing the outer adjusting ring.

[0014] Preferably, the outer adjustment ring is provided with a locking groove surface on one side facing the bottom connecting ring, and the locking member comprises an elastic pin provided on the bottom connecting ring, and the elastic pin abuts against the locking groove surface to achieve locking.

[0015] Preferably, the outer adjustment ring comprises a first ring cover, the locking groove surface is arranged around the bottom surface of the first ring cover, and the elastic pin is located on the top surface of the bottom connecting ring.

[0016] Preferably, the outer adjustment ring further comprises an inner cylinder portion, the first ring cover is located at the outer ring of the inner cylinder portion, and a buckle portion fixedly connected to the main body is provided on the outer peripheral side of the inner cylinder portion.

[0017] Preferably, the outer adjustment ring is provided with a minimum limit position stopper and / or a maximum limit position stopper on the locking groove surface for limiting the circumferential rotation of the locking member.

[0018] Preferably, the bottom connecting ring comprises an outer ring and an inner ring, the outer ring is used for sealingly cooperating with the powder receiving bin, and the inner ring is used for fixedly connecting with the main body.

[0019] Preferably, the outer ring is provided with an annular groove for mounting a sealing ring.

[0020] Preferably, the main body comprises a detachably connected upper body and a lower body, the driving source is located in the upper body, the grinding chamber is located in the lower body, the lower body is provided with a feed port for placing materials, and the feed port is connected to the grinding chamber.

[0021] Preferably, the lower body comprises an outer shell and an inner shell, the upper body is detachably connected to the top of the inner shell, the outer adjustment ring and / or the bottom connecting ring is fixedly connected to the bottom of the inner shell, and the outer shell is sleeved on the outside of the inner shell.

[0022] Preferably, the outer adjustment ring includes an internal threaded portion, the main body is provided with an upper connecting ring movable in the axial direction, the outer ring of the upper connecting ring is provided with an external threaded portion meshing with the internal threaded portion, and the grinding disc is fixedly connected to the upper connecting ring or is an integral structure.

[0023] Preferably, the outer adjustment ring comprises an inner cylinder portion and a first ring cover arranged on the outer ring of the inner cylinder portion, and the internal threaded portion is located on the inner wall of the inner cylinder portion.

[0024] Preferably, a transmission shaft is provided in the main body, the grinding core is installed at the end of the transmission shaft, a return spring is provided between one end of the grinding core and the transmission shaft, and the other end is fixed to the end of the transmission shaft through an adjusting nut.

[0025] These features and advantages of the present invention will be disclosed in detail in the following specific implementation manners and drawings.

Brief Description of the Drawings

[0026] The utility model is further described below in conjunction with the accompanying drawings:

[0027] Figure 1 It is an overall schematic diagram of the first embodiment of the utility model;

[0028] Figure 2 This is a disassembly and assembly diagram of the first embodiment of the utility model;

[0029] Figure 3 The explosion diagram of the lower body in the first embodiment of the utility model is shown in FIG. Figure 1 ;

[0030] Figure 4 The explosion diagram of the lower body in the first embodiment of the utility model is shown in FIG. Figure 2 ;

[0031] Figure 5 It is a cross-sectional schematic diagram of the first embodiment of the utility model;

[0032] Figure 6 for Figure 5 A magnified schematic diagram of center A. [Specific implementation method]

[0033] The following is an explanation and description of the technical scheme of the embodiment of the utility model in conjunction with the drawings of the embodiment of the utility model, but the following embodiment is only a preferred embodiment of the utility model, not all. Based on the embodiment in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the utility model.

[0034] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the referred device or element must have a specific direction, be constructed and operate in a specific direction. Therefore, it should not be understood as a limitation on the present invention.

[0035] Embodiment 1:

[0036] like Figures 1 to 6 As shown, this embodiment shows a portable coffee grinder. Figure 1 As shown, the portable coffee grinder in this embodiment is similar to a thermos cup as a whole, with a small size and can be directly held for operation. Its main structure includes a main body 100 and a powder receiving bin 200 connected to the main body 100, and the powder receiving bin 200 is located below the main body 100, wherein the powder receiving bin 200 and the main body 100 are detachably connected. When the grinding is completed, the user can remove the powder receiving bin 200 separately. The main body 100 is provided with a grinding chamber 201 and a grinding core 21 provided in the grinding chamber 201, and the grinding core 21 is connected to a driving source. In this embodiment, the driving source is preferably a driving motor. Of course, in other embodiments, it can also be manually driven.

[0037] like Figure 2 As shown, in this embodiment, the main body 100 includes an upper body 1 and a lower body 2 that are detachably connected, the driving source is located in the upper body 1, the grinding chamber 201 is located in the lower body 2, and the lower body 2 is provided with a feed port 202 for placing materials, and the feed port 202 is connected to the grinding chamber 201. The advantage of this detachable structure is that the feed port is larger in size and is more convenient for placing materials. It should be noted that in other embodiments, the main body 100 is not limited to having an upper body 1 and a lower body 2 that are detachably connected, and can also be integrated and non-detachable, and a feed port is designed separately to achieve this.

[0038] The grinding chamber 201 of the main body 100 includes a grinding disc 22, and a grinding gap S is formed between the outer wall of the grinding core 21 and the inner wall of the grinding disc 22. The grinding core 21 is usually a cone. After the material enters the main body 100, it is guided into the grinding gap S. When the grinding core 21 rotates, the material is ground and crushed in the grinding gap S, and finally enters the powder receiving bin 200 located below the grinding core 21. This grinding structure has been widely disclosed in the prior art and will not be elaborated in this article.

[0039] In order to facilitate the user to adjust the size of the grinding gap S, in this embodiment, an outer adjustment ring 24 is provided on the outer peripheral side of the main body 100, and the outer adjustment ring 24 is directly exposed to the main body 100. The advantage of this design is that the user can more conveniently and directly adjust the grinding gap S. When the outer adjustment ring 24 rotates, it can drive the grinding disc 22 to move axially to adjust the size of the grinding gap S. The axial direction referred to in this article is the axial direction of the axis of rotation of the grinding core 21. In this embodiment, the outer adjustment ring 24 is located between the main body 100 and the powder receiving bin 200. From the appearance, the outer adjustment ring 24 is also a part of the shell of the main body 100. In addition, in this embodiment, the main body 100 also includes a bottom connecting ring 25 relatively fixed to the main body 100, and the bottom connecting ring 25 is used to connect the bottom powder receiving bin 200. After the bottom connecting ring 25 is set, the powder receiving bin 200 can be directly closely matched with the bottom connecting ring 25 without the need to establish a connection relationship with the outer adjustment ring 24. After being separated from each other, the outer adjustment ring 24 reduces the friction resistance from the powder receiving bin 200 in terms of structural design, and does not need to rotate simultaneously with the powder receiving bin 200, so the adjustment is smoother. At the same time, for the outer adjustment ring 24, there is no need to consider the matching accuracy with the powder receiving bin 200, which can reduce the manufacturing accuracy requirements for the outer adjustment ring 24.

[0040] like Figure 3 or Figure 4 As shown, the bottom connecting ring 25 in this embodiment is also provided with an abutting protrusion 252, and the abutting protrusion 252 is an annular feature extending in the radial direction. It should be noted that the specific structure of the abutting protrusion 252 is not limited to the annular feature in this embodiment, and it can also be a radially outwardly protruding stopper or other implementation methods. When the powder receiving bin 200 is assembled to the main body 100, the top of the powder receiving bin 200 abuts against the bottom of the abutting protrusion 252. At the same time, when the top of the powder receiving bin 200 abuts against the abutting protrusion 252, a gap is left between the outer adjustment ring 24 and the powder receiving bin 200. The gap here refers to that the outer adjustment ring 24 and the powder receiving bin 200 are not tightly matched. After the specific assembly is completed, please refer to Figure 6 , Figure 6 After the middle powder receiving bin 200 abuts against the abutting protrusion 252 of the bottom connecting ring 25, a gap h is still left between the powder receiving bin 200 and the bottom of the outer adjustment ring 24. The existence of the gap h can further ensure that no friction is generated between the outer adjustment ring 24 and the powder receiving bin 200 during the rotation adjustment process.

[0041] At the same time, since the powder receiving bin 200 is a component that often needs to be removed and reassembled, it is also found in actual use that when users are assembling, in order to ensure that the powder receiving bin 200 and the main body 100 do not fall off, they often apply a large force to the powder receiving bin 200, and even knock the powder receiving bin 200 to ensure the stability of the connection with the main body. The design of the abutment protrusion 252 can reduce the impact of the user on the outer adjustment ring 24 during the assembly of the powder receiving bin to a certain extent, because the outer adjustment ring 24 is a relatively precise component. If it is subjected to too much extrusion and impact, it is easy to cause problems such as poor adjustment accuracy. Therefore, the design of the abutment protrusion 252 also helps to increase the use accuracy and service life of the outer adjustment ring 24.

[0042] In order to further optimize the internal structure, the bottom connecting ring 25 of this embodiment is located below the outer adjustment ring 24, and a locking piece 251 for locking the outer adjustment ring 24 is provided on the side of the bottom connecting ring 25 facing the outer adjustment ring 24. With such a design, on the one hand, the bottom of the bottom connecting ring 25 is also sealed and connected to the powder receiving bin 200, and on the other hand, the bottom connecting ring 25 also realizes the function of temporarily locking the outer adjustment ring 24, that is, the bottom connecting ring 25 realizes two functions at the same time.

[0043] That is, in this embodiment, the bottom connecting ring 25 can also serve as the installation base of the locking member 251. As for the outer adjusting ring 24, the space above it is usually relatively cramped. Figure 5 or Figure 6 For example, the grinding chamber 201, the material chamber, etc. occupy space near the center of the main body 100, and the main body 100 shell is limited away from the center. Therefore, a structure that cooperates with the locking piece 251 is provided above the outer adjustment ring 24. The design space is relatively limited. Even if a structure that cooperates with the locking piece 251 is forcibly designed, it may be necessary to increase the radial dimension of the shell of the main body 100, thereby increasing the radial dimension of the entire main body 100. Obviously, the increase in the radial dimension is inconvenient for users to hold.

[0044] In this embodiment, since the locking piece 251 is arranged on the side of the bottom connecting ring 25 facing the outer adjustment ring 24, the structure of the outer adjustment ring 24 and the locking piece 251 can be arranged on the side facing the bottom connecting ring 25. Since the space in the bottom direction is not occupied by large parts, the design space is relatively sufficient and basically does not affect the radial size of the whole machine. In addition, designing the locking piece 251 at this position is also conducive to assembly, which can be seen in FIG. Figure 3 In the embodiment, the operating space for assembling on the bottom connecting ring 25 as a separate component is larger, while assembling the self-locking parts in the narrow space area of ​​the main body 100 shell is relatively complicated and inconvenient for assembly operation.

[0045] In addition, it is also found in actual production that most of the shells of the main body 100 are injection molded parts, and injection molded parts will have shrinkage problems during the production process, especially for parts such as the outer shell. The shrinkage will directly affect the smoothness of the appearance. Therefore, for the shell parts, it is necessary to ensure that the wall thickness is uniform and try not to design a complex structure. In this embodiment, the locking piece 251 is set on the bottom connecting ring 25, which can avoid setting components such as structural columns on the shell parts, reduce the impact of the shrinkage factor on the shell, and try to ensure the surface smoothness of the shell parts.

[0046] For the specific structure of the bottom connecting ring 25, as shown in FIG. Figure 3 or Figure 4 As shown, the bottom connecting ring 25 includes an outer ring 253 and an inner ring 254. The outer ring 253 is used to seal with the powder receiving bin 200. Figure 6 For example, during assembly, the inner wall of the powder receiving bin 200 is sleeved on the outer ring 253. At the same time, in this embodiment, an annular groove is provided on the outer ring 253, and a sealing ring 255 is installed in the annular groove. The inner ring 254 of the bottom connecting ring 25 is used to be fixedly connected to the main body 100. Figure 3 As shown, a plurality of first buckles 256 are provided on the inner ring 254 , and the shell portion of the main body 100 , specifically the lower body 2 , includes an inner shell 26 and an outer shell 27 , wherein the inner shell 26 is provided with a first buckle groove 261 that cooperates with the first buckle 256 .

[0047] For details on the locking structure of the outer adjustment ring 24 and the bottom connecting ring 25, please refer to Figure 3 and Figure 4 As shown, the outer adjustment ring 24 is provided with a locking groove surface 241 on the side facing the bottom connecting ring 25, and the locking groove surface 241 is surrounded by a plurality of locking grooves. The locking member 251 includes an elastic pin provided on the bottom connecting ring 25, and the elastic pin can be inserted into a single locking groove in the locking groove surface 241, so that after the user rotates the outer adjustment ring 24, the elastic force of the elastic pin can be used to temporarily lock the outer adjustment ring 24, so that the adjustment scale will not change easily. When the user needs to readjust, a force can be applied to the outer adjustment ring 24 again to overcome the elastic force of the elastic pin.

[0048] It should be noted that the locking structure is not limited to the present embodiment, and the locking structure may be in the form of a steel ball matched with a plurality of grooves, or a matching structure of a ratchet and ratchet teeth, etc. These implementations all fall within the protection scope of the present utility model.

[0049] Regarding the specific structure of the outer adjustment ring 24, in this embodiment, the outer adjustment ring 24 includes a first ring cover 242, and the locking groove surface 241 is arranged on the bottom surface of the first ring cover 242. The locking groove surface 241 is arranged on the bottom surface. Dust or material powder will fall off by itself due to its own weight, which can prevent dust or material powder from remaining on it to a certain extent to cause the problem of poor locking effect. The elastic pin is located on the top surface of the bottom connecting ring 25, and a part of the bottom connecting ring 25 is accommodated in the cavity formed by the first ring cover 242.

[0050] In addition, if Figure 3 As shown, in this embodiment, the outer adjustment ring 24 also includes an inner cylinder portion 243, and the first ring cover 242 is located at the outer circle of the inner cylinder portion 243. The outer peripheral side of the inner cylinder portion 243 is provided with a buckle portion 244 fixedly connected to the main body 100. In this embodiment, the buckle portion 244 is a full circle of annular grooves, and the inner shell 26 of the main body 100 is provided with a limit block 262 matching the buckle portion 244. A plurality of limit blocks 262 are arranged along the circumferential direction. During assembly, the outer adjustment ring 24 is inserted from the bottom so that the limit block 262 on the inner shell 26 is inserted into the buckle portion 244. With this design, the outer adjustment ring 24 not only realizes the connection with the main body 100, but also can realize the rotation connection with the main body 100. It should be noted that, in the present embodiment, the locking groove surface 241 in the inner and outer adjustment ring 24 is arranged on the bottom surface of the first ring cover 242, and can be staggered with the buckle portion 244 located on the top surface of the first ring cover 242. The advantage of such a design is that it is convenient for mold design, because the buckle portion 244 requires a demolding slider to be realized. If the locking groove surface 241 is arranged on the top surface of the first ring cover 242, the mold design will be very complicated.

[0051] In order to prevent the grinding disc 22 and the grinding core 21 from being over-extruded, the outer adjustment ring 24 in this embodiment is provided with a minimum limit position stopper 245 on the locking groove surface 241. When the locking member 251 abuts against the minimum limit position stopper, the outer adjustment ring 24 cannot continue to rotate, so as to prevent the grinding disc 22 and the grinding core 21 from being over-extruded, and to protect the grinding core 21 or the grinding disc 22. In addition, a maximum limit position stopper is also provided in this embodiment to prevent the grinding gap S from being too large.

[0052] In this embodiment, the grinding gap S is adjusted by threaded matching between the outer adjustment ring 24 and the grinding disc 22. This threaded matching method is relatively common. Specifically, the outer adjustment ring 24 includes an internal threaded portion 246, wherein the internal threaded portion 246 is arranged on the inner wall of the inner cylinder portion 243. The main body 100 is provided with an upper connecting ring 23 that can move in the axial direction. The outer ring of the upper connecting ring 23 is provided with an external threaded portion 231 that meshes with the internal threaded portion 246. The grinding disc 22 is fixedly connected or integrally formed with the upper connecting ring 23. In this embodiment, the upper connecting ring 23 is fixedly connected to the grinding disc 22, so that the grinding disc 22 and the upper connecting ring 23 can be made of different materials. Usually, the grinding disc 22 is made of metal material, while the upper connecting ring 23 can be made of plastic. Of course, in other embodiments, the upper connecting ring 23 can also be made of metal material and be integrated with the grinding disc 22.

[0053] In this embodiment, in order to further optimize the adjustment of the grinding gap S, the mounting structure of the grinding core 21 is also optimized. The axial position of the grinding core 21 determines the initial position of the grinding gap S of the grinder. However, due to the dimensional error of the parts and the subsequent assembly process, it is inevitable that the initial position of the grinding gap S will fluctuate. In order to ensure the uniformity of the initial position as much as possible, the grinding core 21 in this embodiment is also designed with an adjustable structure during assembly. For details, see Figure 6 As shown, a transmission shaft 28 is provided in the main body 100, and the grinding core 21 is installed at the end of the transmission shaft 28. A return spring 281 is provided between one end of the grinding core 21 and the transmission shaft 28, and the other end is fixed to the end of the transmission shaft 28 through an adjusting nut 282. Figure 6 Taking the direction as an example, a drive shaft 28 is installed with a sleeve above the grinding core 21, a reset spring 281 is sleeved between the sleeve and the top of the grinding core 21, a thread is provided at the end of the drive shaft 28, and an adjusting nut 282 is connected. With the help of the reset force of the reset spring 281 and the adjustment and fixing function of the nut, the initial position of the grinding core 21 can be fine-tuned, so that the initial position of the grinding gap S of each grinder is relatively uniform.

[0054] In addition, as described above, in this embodiment, in order to ensure the positioning accuracy of the assembly, Figure 5 and Figure 6As shown, in this embodiment, the lower body 2 includes an outer shell 27 and an inner shell 26, wherein the upper body 1 is detachably connected to the top of the inner shell 26, and the outer adjustment ring 24 and the bottom connecting ring 25 are also fixedly connected to the bottom of the inner shell 26. In addition, the upper connecting ring 23 and the grinding disc 22 are also fixedly connected to the inner shell 26, that is, the inner shell 26 is the unified assembly basis of these parts, with a unified reference and positioning standard, which helps the assembly accuracy of these parts. The outer shell 27 is sleeved on the outside of the inner shell 26, and the outer shell 27 itself only needs to ensure the flatness of the appearance, and does not participate in the assembly and positioning of these parts, reducing the production process requirements.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes but is not limited to the contents described in the drawings and the above specific implementation. Any modification that does not deviate from the functional and structural principles of the utility model will be included in the scope of the claims.

Claims

1. A portable coffee bean grinder, comprising a main body and a powder receiving bin connected to the main body, wherein the main body is provided with a grinding chamber and a grinding core arranged in the grinding chamber, the grinding core is connected to a driving source, a grinding disc is arranged in the grinding chamber, a grinding gap is formed between the outer wall of the grinding core and the inner wall of the grinding disc, and the material enters the powder receiving bin below the grinding core after being ground in the grinding gap, characterized in that: An outer adjustment ring is provided on the outer peripheral side of the main body, and the outer adjustment ring is located between the main body and the powder receiving bin. The outer adjustment ring is used to drive the grinding disc to move axially to adjust the size of the grinding gap. The portable coffee grinder also includes a bottom connecting ring fixed relatively to the main body, and the powder receiving bin is sealingly connected to the bottom connecting ring. The bottom connecting ring is provided with an abutting convex portion for abutting against the powder receiving bin. When the top of the powder receiving bin abuts against the abutting convex portion, a gap is left between the outer adjustment ring and the powder receiving bin.

2. A portable coffee grinder according to claim 1, characterized in that: The bottom connecting ring is located below the outer adjusting ring, and a locking piece for locking the outer adjusting ring is provided on a side of the bottom connecting ring facing the outer adjusting ring.

3. A portable coffee grinder as claimed in claim 2, characterized in that: The outer adjustment ring is provided with a locking groove surface on one side facing the bottom connecting ring, and the locking member comprises an elastic pin provided on the bottom connecting ring, and the elastic pin abuts against the locking groove surface to achieve locking.

4. A portable coffee grinder as claimed in claim 3, characterized in that: The outer adjustment ring comprises a first ring cover, the locking groove surface is arranged around the bottom surface of the first ring cover, and the elastic pin is located on the top surface of the bottom connecting ring.

5. A portable coffee grinder as claimed in claim 4, characterized in that: The outer adjustment ring also includes an inner cylinder portion, the first ring cover is located at the outer ring of the inner cylinder portion, and a buckle portion fixedly connected to the main body is provided on the outer peripheral side of the inner cylinder portion.

6. A portable coffee grinder as claimed in claim 3, characterized in that: The outer adjustment ring is provided with a minimum limit position stopper and / or a maximum limit position stopper on the locking groove surface for limiting the circumferential rotation of the locking member.

7. The portable coffee bean grinder according to claim 1, characterized in that: The bottom connecting ring comprises an outer ring and an inner ring, wherein the outer ring is used for sealingly cooperating with the powder receiving bin, and the inner ring is used for fixedly connecting with the main body.

8. A portable coffee bean grinder as claimed in claim 7, characterized in that: The outer ring is provided with an annular groove for installing a sealing ring.

9. A portable coffee bean grinder according to any one of claims 1 to 8, characterized in that: The main body comprises an upper body and a lower body which are detachably connected, the driving source is located in the upper body, the grinding chamber is located in the lower body, the lower body is provided with a feed port for placing materials, and the feed port is communicated with the grinding chamber.

10. The portable coffee grinder according to claim 9, characterized in that: The lower body comprises an outer shell and an inner shell, the upper body is detachably connected to the top of the inner shell, the outer adjustment ring and / or the bottom connecting ring are fixedly connected to the bottom of the inner shell, and the outer shell is sleeved outside the inner shell.

11. A portable coffee bean grinder according to any one of claims 1 to 8, characterized in that: The outer adjustment ring includes an internal threaded portion, an upper connecting ring movable in an axial direction is provided in the main body, an outer ring of the upper connecting ring is provided with an external threaded portion meshing with the internal threaded portion, and the grinding disc is fixedly connected to the upper connecting ring or is an integral structure.

12. A portable coffee grinder according to claim 11, characterized in that: The outer adjustment ring comprises an inner cylinder part and a first ring cover arranged on the outer circle of the inner cylinder part, and the inner thread part is located on the inner wall of the inner cylinder part.

13. A portable coffee bean grinder according to any one of claims 1 to 8, characterized in that: A transmission shaft is arranged in the main body, the grinding core is installed at the end of the transmission shaft, a return spring is arranged between one end of the grinding core and the transmission shaft, and the other end is fixed to the end of the transmission shaft through an adjusting nut.

Images