Coffee grinder

Abstract

To provide a coffee grinder.SOLUTION: A coffee grinder comprises a housing, a shaft assembly member, and a fixing member. The shaft assembly member is assembled inside the housing, and assembly and fixing of the shaft assembly member and the housing can be easily performed by a structural design of the fixing member after an inner blade tool of the shaft assembly member and an outer blade tool of the housing are assembled as a structure which grinds coffee. By the structural design of the fixing member, after the shaft assembly member and the housing are removed and coffee beans are ground, it is easy to clean and to maintain the coffee grinder.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to the technical field of grinding coffee beans, and more specifically, to a coffee grinder.

Background Art

[0002] Conventional coffee grinders have had the problem that coffee powder after grinding coffee beans is likely to remain inside. Due to the above problems, there are problems such as the taste becoming strange when different types of coffee beans ground later are mixed with the remaining coffee powder, and aflatoxin is generated when the remaining coffee beans accumulate over a long period of time, which is mixed into the coffee powder ground later, and the coffee brewed with the newly ground coffee powder contains trace amounts of toxins, which can affect the health of the body after drinking the coffee. In addition, since conventional coffee grinders are not easy to disassemble and assemble, it is difficult for users to completely clean the coffee powder remaining in the coffee grinder at any time after grinding coffee beans, and it is inconvenient for users to perform cleaning and maintenance after daily use of the coffee grinder.

Summary of the Invention

Problems to be Solved by the Invention

[0003] Therefore, the inventor of the present invention considered that the above-mentioned drawbacks could be improved, and as a result of repeated intensive studies, the present invention was proposed to effectively improve the above problems through rational design.

[0004] The present invention has been made in view of such a situation, and its object is to provide a coffee grinder. In other words, according to the present invention, the problems of conventional coffee grinders, which are not easy to disassemble and assemble and are difficult to clean and maintain after daily use of the coffee grinder, are solved.

[0005] Aspects of the present invention for achieving the above object are as follows. [Means for solving the problem]

[0006] The main invention for achieving the above objective comprises a housing, a shaft assembly member, and a fixing member. The housing has a case, a bearing assembly member, and an outer blade tool. The bearing assembly member is housed inside the case, and the outer blade tool is assembled inside the case and located below the bearing assembly member. The shaft assembly member is assembled inside the case and comprises a shaft, an inner blade tool, and an elastic member. One end of the shaft has a connecting shaft and a shaft cap. The shaft cap is installed on the connecting shaft, and the outer diameter of the lower end of the shaft cap is larger than the outer diameter of the connecting shaft. The inner blade tool is installed at the other end of the shaft, and one end of the shaft is sequentially inserted through the elastic member and the bearing assembly member. Both ends of the elastic member are supported between the inner blade tool and the bearing assembly member, respectively. The inner blade tool has a grinding gap between it and the corresponding outer blade tool. The shaft drives the inner blade tool to rotate relative to the outer blade tool, and grinding is performed by the combination of the inner blade tool and the outer blade tool. The fixing member comprises a main body, a fixing hole, and a fixing slot. The shape of the fixing hole and the slot are the same as the peripheral shape of the lower end of the shaft cap. The fixing slot is installed in the main body, the fixing hole penetrates the main body at a position corresponding to the fixing slot, and the position of the fixing slot at the surface of the main body is different from the position of the fixing hole at the surface of the main body. In the assembled state, the shaft cap penetrates the fixing hole of the fixing member in a corresponding manner, and the fixing member presses the bearing assembly member and the elastic member downwards. In the completed assembly state, the elastic member supports the bearing assembly member and the fixing member upwards, the lower end of the shaft cap fits into the fixing slot of the fixing member, and the fixing member is fixed between the shaft cap and the bearing assembly member.

[0007] Furthermore, in the coffee grinder according to the present invention, the bearing assembly member comprises a bearing section, a first ball bearing, and a second ball bearing. The bottom of the bearing section has a lower bearing groove, the upper part of the bearing section has an upper bearing groove, and the bearing section has a shaft hole communicating between the lower bearing groove and the upper bearing groove. The first ball bearing is located in the lower bearing groove, the second ball bearing is located in the upper bearing groove, and the shaft is inserted through the first ball bearing, the bearing section, and the second ball bearing.

[0008] Furthermore, in the coffee grinder according to the present invention, the shaft assembly member further comprises a collar that covers the shaft and is located between the elastic member and the bottom of the bearing assembly member.

[0009] Furthermore, in the coffee grinder according to the present invention, a shoulder portion is provided at the lower end of the shaft cap, and the shape of the fixing hole, the shape of the fixing slot, and the peripheral shape of the shoulder portion of the shaft cap are polygonal, for example, a hexagon, a pentagon, a quadrilateral, or a triangle.

[0010] Furthermore, the coffee grinder according to the present invention further comprises an adjustment assembly member comprising an adjustment member, a plurality of drive rods, and a rotating ring. The bottom of the adjustment member is screwed into an upper bearing groove, the adjustment member supports a fixed member, and the upper circumference of the adjustment member has a gear ring. The rotating ring is rotatably mounted in the housing, and these drive rods are mounted on the rotating ring, and these drive rods are each engaged with the gear ring. The rotating ring is linked to rotate these drive rods, and these drive rods are linked to the gear ring to drive the adjustment member to rotate so that it moves up or down relative to the upper bearing groove.

[0011] Furthermore, the coffee grinder according to the present invention further comprises a third ball bearing, the adjustment member has a groove, the third ball bearing is installed inside the groove, and the fixing member is positioned on the third ball bearing.

[0012] Furthermore, in the coffee grinder according to the present invention, the upper outer surface of the housing has a plurality of protruding members, and the inner surface of the rotating ring has a plurality of notches, these protruding members correspond to these notches, and these protruding members are located in the rotation path of these notches.

[0013] Furthermore, the coffee grinder according to the present invention further comprises a handle assembly member comprising a pivot member, a hand lever, and a grip. The pivot member is installed at one end of the hand lever, the grip is installed at the other end of the hand lever, and the pivot member is assembled to the shaft cap.

[0014] Furthermore, in the coffee grinder according to the present invention, the shaft cap has a groove, the pivot member is fitted inside the shaft cap, and the shaft cap and pivot member are magnetic members and attract each other by magnetic force.

[0015] Furthermore, in the coffee grinder according to the present invention, there is a storage space between the case and the bearing assembly member that communicates with the grinding gap.

[0016] Furthermore, the coffee grinder according to the present invention further comprises a cover assembly member which includes a support member and a cover. The support member is assembled to the shaft cap, the cover is assembled to the support member, and the cover covers the top of the storage space.

[0017] Furthermore, in the coffee grinder according to the present invention, the grinding inclined surface of the inner blade tool has a grinding gap with respect to the grinding annular surface of the outer blade tool, the grinding inclined surface of the inner blade tool has a first grinding surface and a second grinding surface, the first grinding surface is located above the second grinding surface, and the grinding grooves of the second grinding surface are more densely packed than the grinding grooves of the first grinding surface.

[0018] Furthermore, the coffee grinder according to the present invention is further equipped with an electric mechanism connected to the shaft. [Effects of the Invention]

[0019] Thus, the present invention has the following effects. The coffee grinder according to the present invention comprises a housing, a shaft assembly member, and a fixing member. The shaft assembly member is assembled within the housing, and after the inner blade tool of the shaft assembly member and the outer blade tool of the housing are assembled as a structure for grinding coffee, the structural design of the fixing member makes it easy to assemble and fix the shaft assembly member and the housing. Furthermore, the structure of the fixing member makes it easy to remove the shaft assembly member and housing, clean the coffee grinder after grinding coffee beans, and perform maintenance.

[0020] Other objects, structures, and effects of the present invention will become apparent from the following section on embodiments of the invention. [Brief explanation of the drawing]

[0021] [Figure 1] This is an external perspective view showing a coffee grinder according to one embodiment of the present invention. [Figure 2] This is a cross-sectional view along the line A-A' in Figure 1. [Figure 3] This is an exploded view showing a partial configuration of a coffee grinder according to one embodiment of the present invention. [Figure 4] This is another exploded view showing a partial configuration of a coffee grinder according to one embodiment of the present invention. [Figure 5]It is a fixed operation diagram (one) showing the fixing member and the shaft of the present invention. [Figure 6] It is a fixed operation diagram (two) showing the fixing member and the shaft of the present invention. [Figure 7] It is a fixed operation diagram (three) showing the fixing member and the shaft of the present invention. [Figure 8] It is a fixed operation diagram (four) showing the fixing member and the shaft of the present invention. [Figure 9] It is another exploded view showing a partial configuration of a coffee grinder according to an embodiment of the present invention. [Figure 10] It is yet another exploded view showing a partial configuration of a coffee grinder according to an embodiment of the present invention. [Figure 11] It is an external inclined view of a coffee grinder according to an embodiment of the present invention connected to an electric mechanism.

Modes for Carrying Out the Invention

[0022] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution means of the invention.

[0023] Figure 1 is an external perspective view showing the coffee grinder of the present invention. Figure 2 is a cross-sectional view along line AA' in Figure 1. Figure 3 is an exploded view showing a partial configuration of the coffee grinder of the present invention. As shown in the figure, the coffee grinder 1 according to this embodiment is composed of a housing 11, a shaft assembly member 13, and a fixing member 15. The housing 11 has a case 111, a bearing assembly member 112, and an outer blade tool 113, with the bearing assembly member 112 being housed inside the case 111. The outer blade tool 113 is assembled inside the case 111 and is located below the bearing assembly member 112. The shaft assembly member 13 is assembled inside the case 111 and has a shaft 131, an inner blade tool 132, and an elastic member 133. One end of the shaft 131 has a connecting shaft 1311 and a shaft cap 1312, with the shaft cap 1312 being installed on the connecting shaft 1311. The outer diameter of the lower end of the shaft cap 1312 is larger than the outer diameter of the connecting shaft 1311. The inner blade tool 132 is installed at the other end of the shaft 131, and one end of the shaft 131 is sequentially inserted through the elastic member 133 and the bearing assembly member 112. Both ends of the elastic member 133 are supported between the inner blade tool 132 and the bearing assembly member 112, and the inner blade tool 132 has a grinding gap G between it and the corresponding outer blade tool 113. The shaft 131 drives the inner blade tool 132 to rotate relative to the outer blade tool 113, and the combination of the inner blade tool 132 and the outer blade tool 113 grinds the coffee beans, and the coffee powder after grinding the coffee beans is discharged from the grinding gap G.

[0024] As described above, there is a storage space 110 between the case 111 and the bearing assembly member 112 that communicates with the grinding gap G. Furthermore, the grinding inclined surface 1321 of the inner blade tool 132 has a grinding gap G with respect to the grinding annular surface 1131 of the outer blade tool 113, and the grinding inclined surface 1321 of the inner blade tool 1321 has a first grinding surface 1322 and a second grinding surface 1323, the first grinding surface 1322 is located above the second grinding surface 1323, and the grinding grooves of the second grinding surface 1323 are denser than the grinding grooves of the first grinding surface 1322. As a result, after the coffee beans are put into the storage space 110, the coffee beans are first coarsely ground by the first grinding surface 1322 and the grinding annular surface 1131 of the grinding inclined surface 1321, and then the coffee beans are further ground finely by the second grinding surface 1323 and the grinding annular surface 1131 of the grinding inclined surface 1321.

[0025] Figure 4 is another exploded view showing a partial configuration of the coffee grinder of the present invention. As shown in Figure 4, in this embodiment, the fixing member 15 has a main body 150, a fixing hole 151, and a fixing slot 152. The hole shape of the fixing hole 151 and the slot shape of the fixing slot 152 are the same as the shape of the shoulder portion 13120 provided at the lower end of the shaft cap 1312. The fixing slot 152 is installed in the main body 150, and the fixing hole 151 penetrates the main body 150 at a position corresponding to the fixing slot 152. The position of the slot angle of the fixing slot 152 located on the surface of the main body 150 is different from the position of the hole angle of the fixing hole 151 located on the surface of the main body 150. The hole shape of the fixing hole 151, the slot shape of the fixing slot 152, and the peripheral shape of the shoulder portion 13120 of the shaft cap 1312 are polygonal, for example, hexagonal, pentagonal, quadrilateral, or triangular. However, in actual implementation, the above shapes are not limited to these and can be selected and adjusted according to user needs.

[0026] In this embodiment, a hexagon is used as an example of the shape. The slot of the fixed slot 152 and the hole of the fixed hole 151 are hexagonal. The fixed slot 152 and the fixed hole 151 are installed so as to overlap on the fixed member 15, and the position of the slot angle of the fixed slot 152 is different from the position of the hole angle of the fixed hole 151. That is, the center points of the slot of the fixed slot 152 and the hole of the fixed hole 151 are the same, but the two hexagons are deflected from each other. In other words, after the overlapping portion of the center points of the fixed slot 152 and the fixed hole 151, the fixed slot 152 and the fixed hole 151 are deflected at the same axial position, the corners of the slot of the fixed slot 152 and the corners of the hole of the fixed hole are shifted from each other and no longer overlap. The corners of the slot of the fixed slot 152 correspond to the outside of the side edge of the hole of the fixed hole 151, and the corners of the hole of the fixed hole 151 correspond to the outside of the side edge of the slot of the fixed slot 152. More specifically, the fixing hole 151 penetrates the fixing member 15 and the bottom of the fixing slot 152. After the fixing hole 151 penetrates a portion of the bottom of the fixing slot 152, the area of ​​the fixing slot 152 that is not penetrated by the fixing hole 151 (i.e., the edges and corners of the fixing slot 152) has the bottom of the fixing slot 152 and forms a shoulder portion 13120 that supports the shaft cap 1312.

[0027] Figure 5 is a fixing operation diagram (1) showing the fixing member and shaft of the present invention. As shown in Figure 5, in the assembled state of this embodiment, the fixing hole 151 of the fixing member 15 corresponds to the peripheral shape of the shoulder portion 13120 of the shaft cap 1312, and the connecting shaft 1311 and shaft cap 1312 of the shaft 131 pass through the fixing hole 151 of the fixing member 15. The dashed line shown in Figure 5 shows the approximate range of the hole area of ​​the fixing hole 151, and indicates the area in which the shaft cap 1312 and connecting shaft 1311 pass through the fixing hole 151 of the fixing member 15 with the shaft facing upwards.

[0028] Figure 6 is a fixing operation diagram (2) showing the fixing member and shaft of the present invention. As shown in Figure 6, in this embodiment, after the connecting shaft 1311 and shaft cap 1312 pass through the fixing hole 151 of the fixing member 15 in corresponding directions, the fixing member 15 presses the bearing assembly member 112 of the housing 11 downward (see Figure 2), the bearing assembly member 112 of the housing 11 presses the elastic member 133 downward, the height of the shoulder portion 13120 of the shaft cap 1312 is positioned above the hole 151 of the fixing member 15, and the connecting shaft 1311 is positioned inside the fixing hole 151 of the fixing member 15.

[0029] Figure 7 is a fixing operation diagram (III) showing the fixing member and shaft of the present invention. As shown in Figure 7, in this embodiment, the diameter of the fixing hole 151 of the fixing member 15 is larger than the outer diameter of the connecting shaft 1311. Therefore, the fixing member 15 is rotated to change the angle from the original angle in which the fixing hole 151 corresponds to the shoulder portion 13120 of the shaft cap 1312 to the angle in which the slot of the fixing slot 152 corresponds to the shoulder portion 13120 of the shaft cap 1312, so that the corner of the shoulder portion 13120 of the shaft cap 1312 corresponds to the upper part of the corner having the bottom of the slot of the fixing slot 152. The dashed line shown in Figure 7 shows the approximate range of the slot area of ​​the fixing slot 152.

[0030] Figure 8 is a fixing operation diagram (IV) showing the fixing member and shaft of the present invention. As shown in Figure 8, in this embodiment, when the assembly of this embodiment is completed, the fixing member 15 releases the external force that pushes the bearing assembly member 112 of the housing 11 downward, so that the elastic member 133 is not subjected to pressure, the elastic member 133 recovers its elasticity and supports the bearing assembly member 112 of the housing 11 upward, and the bearing assembly member 112 supports the fixing member 15 upward. The shoulder portion 13120 of the shaft cap 1312 fits into the fixing slot 152, and the bottom of the slot of the fixing slot 152 supports the corner portion of the shoulder portion 13120, and the fixing member 15 is fixed between the shaft cap 1312 and the bearing assembly member 112.

[0031] Returning to Figure 3, the bearing assembly member 112 comprises a bearing section 1121, a first ball bearing 1122, and a second ball bearing 1123. The bottom of the bearing section 1121 has a lower bearing groove 1124, the upper part of the bearing section 1121 has an upper bearing groove 1125, and the bearing section 1121 has a shaft hole 1126. The shaft hole 1126 communicates with the lower bearing groove 1124 and the upper bearing groove 1125, the first ball bearing 1122 is located in the lower bearing groove 1124, and the second ball bearing 1123 is located in the upper bearing groove 1125. The shaft 131 is inserted through the first ball bearing 1122, the bearing section 1121, and the second ball bearing 1123, and the first ball bearing 1122 and the second ball bearing 1123 are fixed to the shaft 131. This reduces the rotational frictional force of the shaft 131 relative to the bearing section 1121 of the bearing assembly member 112. Furthermore, the shaft assembly member 13 is further equipped with a collar 134 that covers the shaft 131, and the collar 134 is located between the elastic member 133 and the bottom of the bearing assembly member 112, and the collar 134 contributes to the stability of the support of one end of the elastic member 133.

[0032] Figure 9 is a further exploded view showing a partial configuration of the coffee grinder of the present invention. As shown in Figure 9, this embodiment further comprises an adjustment assembly member 17 comprising an adjustment member 171, a plurality of drive rods 172, and a rotating ring 173. The adjustment member 171 has a male thread 1713 on the outside of its bottom and a female thread 1127 inside the upper bearing groove 1125, and the male thread 1713 at the bottom of the adjustment member 171 is screwed into the female thread 1127 inside the upper bearing groove 1125. The adjustment member 171 supports the lower part of the fixing member 15 and has a gear ring 1711 on the circumferential side of the upper part of the adjustment member 171. The rotating ring 173 is rotatably mounted on the housing 11, and the drive rods 172 are mounted on the rotating ring 173, and the drive rods 172 are each engaged with the gear ring 1711. The rotating ring 173 is linked to rotate the drive rods 172, and the drive rods 172 are linked to the gear ring 1711 to drive the adjustment member 171 to rotate so that it moves up or down relative to the upper bearing groove 1125.

[0033] Returning to Figure 2, when the adjustment member 171 rotates upward, it supports the fixing member 15 upward, and at the same time, the fixing member 15 pulls the shaft 131 upward, causing the inner blade tool 132 of the shaft 131 to compress the elastic member 133 toward the bearing assembly member 112, and the grinding inclined surface 1321 of the inner blade tool 132 of the shaft 131 approaches the grinding annular surface 1131 of the outer blade tool 113 of the housing 11, thus reducing the grinding gap G. As a result, the particle size of the coffee powder after grinding the coffee beans becomes smaller than the grinding gap G, and the coffee powder spills out of the grinding gap G, thus controlling the particle size of the ground coffee powder. As shown in Figure 2, when the adjustment member 171 is rotated to rise to its highest position, the bottom of the crushing inclined surface 1321 of the inner blade tool 132 of the shaft 131 and the bottom of the crushing annular surface 1131 of the outer blade tool 113 of the housing 11 come into contact with each other, and the crushing gap G is closed.

[0034] When the adjustment member 171 rotates downward, it supports the fixing member 15 to move downward, causing the fixing member 15 to cease acting on the shaft 131. Simultaneously, the inner blade tool 132 of the shaft 131 no longer compresses the elastic member 133 in the direction of the bearing assembly member 112. In other words, the elastic recovery force of the elastic member 133 pushes the inner blade tool 132 downward, which in turn causes the shaft 131 to move downward. As a result, the grinding inclined surface 1321 of the inner blade tool 132 separates from the grinding annular surface 1131 of the outer blade tool 113 of the housing 11, and the grinding gap G expands. This results in coarser ground coffee bean powder.

[0035] Furthermore, the adjustment assembly member 17 is further equipped with a third ball bearing 174, the adjustment member 171 has a groove 1712, the third ball bearing 174 is positioned within the groove 1712, and the fixing member 15 is positioned on the third ball bearing 174. The shaft 131 is inserted through the third ball bearing 174. As a result, the third ball bearing 174 reduces the rotational friction force between the fixing member 15 and the adjustment member 171. In addition, the upper outer surface of the housing 11 has a plurality of protruding members 114, and the inner surface of the rotating ring 173 has a plurality of notches 1731. These protruding members 114 correspond to these notches 1731, and these protruding members 114 are located in the rotational path of these notches 173 of the rotating ring 173, and receive vibrations and noise when these protruding members 114 insert into and remove from these notches 1731 during the rotation process of the rotating ring 173. The rotating ring 173 has numbers on its outer surface, and during the rotation process, the user adjusts the size of the grinding gap G by adjusting the rotation distance using the numbers and markings on the rotating ring 173.

[0036] Furthermore, the upper outer surface of the housing 11 has a zero-reset indicator 115 located between two protruding members 114. By rotating the adjustment member 171 to its highest position, the user raises the inner blade tool 132 of the shaft 131 to its highest position, and with the grinding gap G closed, the zero point of the number or scale on the outer surface of the rotating ring 173 is assembled to the position corresponding to the zero-reset indicator 115. This allows the user to know that the grinding gap G of the coffee grinder 1 is currently at the zero point with the grinding gap G closed, and then adjust the size of the grinding gap G based on the zero-reset indicator 115, corresponding to how many notches on the rotating ring 173 the size of the grinding gap G will be rotated.

[0037] Figure 10 is yet another exploded view showing a partial configuration of the coffee grinder of the present invention. In this embodiment, the handle assembly member 19 further comprises a pivot member 191, a hand lever 192, and a grip 193. The pivot member 191 is installed at one end of the hand lever 192, the grip 193 is installed at the other end of the hand lever 192, and the pivot member 191 is assembled to the shaft cap 1312. The shaft cap 1312 also has a groove 1313, and the pivot member 191 is fitted inside the shaft cap 1312. The shaft cap 1312 and the pivot member 191 are magnetic materials, and the shaft cap 1312 and the pivot member 191 attract each other by magnetic force, making assembly and fixing easier.

[0038] Furthermore, it further comprises a cover assembly member 21 which includes a support member 211 and a cover 212. The support member 211 is assembled to the shaft cap 1312, and the cover 212 is assembled to the support member 211, and the cover 212 covers the top of the storage space 110. It also further comprises a receiving section 23, which has a storage tank 231 corresponding to the outlet of the grinding gap G, and the receiving section 23 is used to collect the ground coffee powder.

[0039] Figure 11 is an external inclined view showing the coffee grinder of the present invention connected to an electric mechanism. As shown in Figure 11, this embodiment further includes an electric mechanism 25 connected to a shaft 131, the electric mechanism 25 driving the shaft 131 to rotate, the shaft 131 interlocking the inner blade tool 132 to rotate relative to the outer blade tool 113, thereby achieving electric grinding of coffee beans. The electric mechanism 25 is a motor or any drive element. The electric mechanism 25 is at least the base described in another application by the present applicant (see Taiwan Patent Application No. 111203945) and is connected to the shaft 131 by a drive shaft of the first assembly. The length and structure of the drive shaft may be such as to be suitable for the overall shape and size of the coffee grinder of the present invention.

[0040] In summary, this invention provides a coffee grinder comprising a housing, a shaft assembly member, and a fixing member. The shaft assembly member is assembled within the housing, and after the internal blade tool of the shaft assembly member and the external blade tool of the housing are assembled as a structure for grinding coffee, the structural design of the fixing member makes it easy to assemble and fix the shaft assembly member and the housing. Furthermore, the structure of the fixing member makes it easy to remove the shaft assembly member and housing, clean the coffee grinder after grinding coffee beans, and perform maintenance.

[0041] Incidentally, the terms “to include,” “to encompass,” or any other variations thereof have a non-exclusive meaning, encompassing a set of elements, processes, methods, goods, or equipment, and including not only these elements but also other elements not explicitly mentioned, as well as elements inherent to such processes, methods, goods, or equipment. In the absence of further restrictions, the elements limited by the phrase “to include…” do not exclude other identical elements that are further present in the process, methods, goods, or equipment of said elements.

[0042] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be obvious to those skilled in the art that various modifications or improvements can be made to the above embodiments. Furthermore, it will be obvious to those skilled in the art that such modifications or improvements can be made. Moreover, it will be clear from the claims that such modified or improved forms may also be included within the technical scope of the present invention. [Explanation of Symbols]

[0043] 1. Coffee grinder 11 Housing 110 storage spaces 111 cases 112 Bearing assembly components 1121 Bearing section 1122 First Ball Bearing 1123 Second ball bearing 1124 Lower bearing groove 1125 Upper bearing groove 1126 Shaft hole 1127 Female thread 113 Outer cutting tool 1131 Crushed ring surface 114 Convex member 13 Shaft assembly components 131 Shaft 1311 Connecting shaft 1312 Shaft Cap 13120 Shoulder 1313 Groove 132 Inner cutting tool 1321 Grinding inclined surface 1322 First grinding surface 1323 Second crushing surface 133 Elastic members 134 Colors 15 Fixing member 150 Main Unit 151 Fixing hole 152 fixed slots 17 Adjustment assembly parts 171 Adjustment Member 1711 Gearing 1712 Groove 172 Drive Rod 173 Rotating Ring 1731 Notch 174 Third ball bearing 19 Handle assembly components 191 Pivot Member 192 Hand Lever 193 Grip 21 Cover assembly components 211 Support member 212 Cover 23 Receptor part 231 Storage Tank 25 Electric Mechanism G Crushing gap

Claims

1. A housing comprising a case, a bearing assembly member, and an outer cutting tool, wherein the bearing assembly member is installed inside the case, the outer cutting tool is assembled inside the case, and the outer cutting tool is located below the bearing assembly member. A shaft assembly member assembled within the case, the shaft assembly member comprising a shaft, an internal blade tool, and an elastic member, wherein one end of the shaft has a connecting shaft and a shaft cap, the shaft cap is installed on the connecting shaft, the outer diameter of the lower end of the shaft cap is larger than the outer diameter of the connecting shaft, the internal blade tool is installed on the other end of the shaft, one end of the shaft is sequentially inserted through the elastic member and the bearing assembly member, both ends of the elastic member are supported between the internal blade tool and the bearing assembly member, the internal blade tool has a grinding gap between it and the corresponding outer blade tool, the shaft drives the internal blade tool to rotate relative to the outer blade tool, and the shaft assembly member performs grinding by the combination of the internal blade tool and the outer blade tool. A fixing member comprising a main body, a fixing hole, and a fixing slot, wherein the hole shape of the fixing hole and the slot shape of the fixing slot are the same as the peripheral edge shape of the lower end of the shaft cap, the fixing slot is installed in the main body, the fixing hole penetrates the main body at a position corresponding to the fixing slot, and the fixing slot has a slot angle position on the surface of the main body that is different from the hole angle position of the fixing hole on the surface of the main body. A coffee grinder characterized in that, in the assembled state, the shaft cap passes through the corresponding fixing hole of the fixing member, the fixing member presses the bearing assembly member and the elastic member downwards, and in the completed assembled state, the elastic member supports the bearing assembly member and the fixing member upwards, the lower end of the shaft cap fits into the fixing slot of the fixing member, and the fixing member is fixed between the shaft cap and the bearing assembly member.

2. The coffee grinder according to claim 1, characterized in that the bearing assembly member includes a bearing portion, a first ball bearing, and a second ball bearing, the bearing portion has a lower bearing groove at its bottom and an upper bearing groove at its top, the bearing portion has a shaft hole communicating between the lower bearing groove and the upper bearing groove, the first ball bearing is located in the lower bearing groove and the second ball bearing is located in the upper bearing groove, and the shaft is inserted through the first ball bearing, the bearing portion and the second ball bearing.

3. The coffee grinder according to claim 1, characterized in that the shaft assembly member further comprises a collar that covers the shaft and is located between the elastic member and the bottom of the bearing assembly member.

4. The coffee grinder according to claim 1, characterized in that a shoulder portion is provided at the lower end of the shaft cap, and the shape of the hole of the fixing hole, the shape of the slot of the fixing slot, and the peripheral shape of the shoulder portion of the shaft cap are polygonal.

5. The coffee grinder according to claim 2, further comprising an adjustment assembly member comprising an adjustment member, a plurality of drive rods, and a rotating ring, wherein the bottom of the adjustment member is screwed into the upper bearing groove, the adjustment member supports the fixing member, the upper circumference of the adjustment member has a gear ring, the rotating ring is installed in the housing so as to rotate, and the drive rods are installed in the rotating ring, the drive rods are each engaged with the gear ring, the rotating ring is linked to rotate the drive rods, and the drive rods are linked to the gear ring so as to drive the adjustment member to rotate up or down relative to the upper bearing groove.

6. The coffee grinder according to claim 5, further comprising a third ball bearing, wherein the adjustment member has a groove, the third ball bearing is installed in the groove, and the fixing member is positioned on the third ball bearing.

7. The coffee grinder according to claim 5, characterized in that the upper outer part of the housing has a plurality of protruding members, the rotating ring has a plurality of notches on the inside, these protruding members correspond to these notches, and these protruding members are located in the rotation path of these notches.

8. The coffee grinder according to claim 1, further comprising a handle assembly member comprising a pivot member, a hand lever, and a grip, wherein the pivot member is installed at one end of the hand lever, the grip is installed at the other end of the hand lever, and the pivot member is assembled to the shaft cap.

9. The coffee grinder according to claim 8, characterized in that the shaft cap has a groove, the pivot member is fitted into the shaft cap, the shaft cap and the pivot member are magnetic members, and the shaft cap and the pivot member are attracted to each other by magnetic force.

10. The coffee grinder according to claim 1, characterized in that there is a storage space between the case and the bearing assembly member, and the storage space is in communication with the grinding gap.

11. The coffee grinder according to claim 10, further comprising a cover assembly member comprising a support member and a cover, wherein the support member is assembled to the shaft cap, the cover is assembled to the support member, and the cover covers the top of the storage space.

12. The coffee grinder according to claim 1, characterized in that the grinding inclined surface of the inner blade tool has the grinding gap with respect to the grinding annular surface of the outer blade tool, the grinding inclined surface of the inner blade tool has a first grinding surface and a second grinding surface, the first grinding surface is located above the second grinding surface, and the grinding grooves of the second grinding surface are more densely packed than the grinding grooves of the first grinding surface.

13. The coffee grinder according to claim 1, further comprising an electric mechanism connected to the aforementioned shaft.

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