Electric coffee bean grinding machine

Abstract

The utility model provides an electric coffee bean grinding machine, a bean grinding module comprises a second shell, a rotating shaft, an inner grinding wheel, an outer grinding wheel, an adjusting ring, a pressure spring, an elastic column, a movable ring, a spring, an adjusting disc and a clamping disc, the outer grinding wheel is fixedly arranged on the movable ring, and the adjusting ring is rotatably supported on the second shell; a plurality of clamping grooves are formed in the inner circumference of the adjusting ring and evenly distributed in the circumferential direction of the adjusting ring, a static ring is arranged in the second shell, a limiting groove is formed in the outer circumference of the static ring, and a compression spring is located in the limiting groove and elastically forces the elastic column to stretch out of the limiting groove. The extending end, extending out of the limiting groove, of the elastic column is embedded into one clamping groove. According to the electric coffee bean grinding machine, the outer grinding wheel and the inner grinding wheel can be adjusted respectively, so that the adjusting gear range of the grinding gap is enlarged, the grinding gap can be accurately adjusted, the adjusting perceptibility of the grinding gap is good, and then the user experience is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of coffee bean grinding equipment, and in particular to an electric coffee bean grinder. Background Technology

[0002] The inner grinding wheel of the coffee bean grinder is located on the drive shaft, and the outer grinding wheel is sleeved on the outer circumference of the inner grinding wheel, forming a grinding gap between them. The size of this grinding gap determines the particle size of the ground coffee powder.

[0003] To meet users' different needs for the fineness of coffee powder, existing coffee bean grinders are equipped with an adjustment mechanism to adjust the axial direction of one of the inner or outer grinding wheels, thereby adjusting the grinding gap between the outer and inner grinding wheels.

[0004] However, existing coffee grinders can only adjust one of the inner or outer grinding wheels, limiting the range of adjustable grinding gaps. Furthermore, adjusting the grinding gap in existing grinders relies solely on feel, resulting in poor precision and a lack of intuitive feedback, negatively impacting the user experience. Summary of the Invention

[0005] To achieve the main objective of this utility model, this utility model provides an electric coffee bean grinder that can adjust the outer grinding wheel and the inner grinding wheel separately, thereby expanding the adjustment range of the grinding gap and enabling precise adjustment of the grinding gap. The adjustment of the grinding gap is also highly perceptible, thus improving the user experience.

[0006] To achieve the main objective of this utility model, an electric coffee bean grinder is provided, comprising a drive module and a grinding module. The drive module includes a first housing and a motor disposed within the first housing. The grinding module includes a second housing, a rotating shaft, an inner grinding wheel, an outer grinding wheel, an adjusting ring, a compression spring, a spring post, a moving ring, a spring, an adjusting disc, and a locking disc. The rotating shaft is rotatably supported on a bracket of the second housing. The inner grinding wheel is fitted onto the grinding end of the rotating shaft, and the drive end of the rotating shaft can be connected to the drive shaft of the motor. The outer grinding wheel is fitted onto the outer circumference of the inner grinding wheel, forming a grinding gap between them. The outer grinding wheel is fixed on the moving ring. The adjusting ring is rotatably supported on the second housing, and the adjusting ring is threadedly connected to the moving ring for controllability. The moving ring moves axially on the rotating shaft. Multiple slots are opened on the inner circumference of the adjusting ring, and the multiple slots are evenly distributed in the circumference of the adjusting ring. A stationary ring is set inside the second housing. A limiting groove is opened on the outer circumference of the stationary ring. The compression spring is located in the limiting groove and elastically forces the spring to extend out of the limiting groove. The extended end of the spring extending out of the limiting groove is embedded in a slot. The spring is sleeved on the rotating shaft and presses against the bracket and the inner grinding wheel. The adjusting plate is threaded onto the rotating shaft. The positioning plate is located between the inner grinding wheel and the adjusting plate and is fixed on the inner grinding wheel. Multiple positioning grooves are opened on the positioning end face of the positioning plate, and the multiple positioning grooves are evenly distributed in the circumference of the positioning plate. An elastic protrusion is provided on the adjusting end face of the adjusting plate, and the elastic protrusion is embedded in a positioning groove.

[0007] As can be seen from the above scheme, during the use of the electric coffee bean grinder of this utility model, by rotating the adjusting ring, since the adjusting ring is rotatably supported on the second shell and threadedly connected to the moving ring, the moving ring can be synchronously controlled to move axially on the rotating shaft during the rotation of the adjusting ring. Since the outer grinding wheel is fixed on the moving ring, it moves axially on the rotating shaft along with the moving ring to synchronously drive the outer grinding wheel to move axially on the rotating shaft, thereby adjusting the grinding gap between the outer grinding wheel and the inner grinding wheel to change the particle size of the ground coffee powder. Furthermore, the adjusting ring of this invention has multiple slots on its inner circumference, which are evenly distributed around the circumference of the adjusting ring. A stationary ring is provided inside the second shell, and a limiting groove is provided on the outer circumference of the stationary ring. A compression spring is located in the limiting groove and elastically forces the spring post to extend out of the limiting groove. The extended end of the spring post extending out of the limiting groove is embedded in a slot. As the adjusting ring rotates, the extended end of the spring post can elastically extend and retract to rotate out of the previous slot and into the next slot, thereby achieving precise adjustment of the axial movement of the outer grinding wheel on the rotating shaft, and thus precisely adjusting the grinding gap between the outer grinding wheel and the inner grinding wheel. In the process of rotating the adjusting ring to adjust the grinding gap between the outer grinding wheel and the inner grinding wheel, the user can clearly feel the switching between two adjacent slots, making the user clearly perceive the adjustment of the grinding gap. This improves the user experience by enhancing the perception of the grinding gap adjustment. Furthermore, the extended end of the spring pin on the second shell of this utility model can stably limit the position of the slot on the adjusting ring, thereby avoiding slippage and causing adjustment errors in the grinding gap between the outer grinding wheel and the inner grinding wheel, thus improving the adjustment accuracy of the grinding gap.

[0008] Furthermore, in this electric coffee bean grinder, the adjusting disc is threaded onto the rotating shaft, and the locking disc is located between the inner grinding wheel and the adjusting disc and fixed to the inner grinding wheel. A spring forces the inner grinding wheel to drive the locking disc to abut against the adjusting disc. By rotating the adjusting disc, the elastic protrusion of the adjusting disc can elastically deform and rotate out of the previous positioning groove on the locking disc and into the next positioning groove, thereby achieving precise adjustment of the axial movement of the inner grinding wheel on the rotating shaft, and thus precisely adjusting the grinding gap between the outer grinding wheel and the inner grinding wheel. During the process of rotating the adjusting disc to adjust the grinding gap between the outer and inner grinding wheels, a noticeable switching sensation between adjacent positioning grooves can be felt, allowing for a clear perception of the grinding gap adjustment, resulting in good sensitivity to the adjustment. In addition, the elastic protrusion on the adjusting disc can stably limit the positioning groove of the locking disc fixed to the inner grinding wheel, thereby preventing slippage and resulting in adjustment errors in the grinding gap between the outer and inner grinding wheels, thus improving the accuracy of the grinding gap adjustment.

[0009] Therefore, the electric coffee bean grinder of this invention can adjust the outer grinding wheel and the inner grinding wheel separately, thereby expanding the adjustment range of the grinding gap and accurately adjusting the grinding gap. Moreover, the adjustment of the grinding gap is highly perceptible, thus improving the user experience.

[0010] A preferred embodiment is that the outer circumferential surface of the adjusting ring is provided with a scale, and the outer circumferential surface of the second shell is provided with scale markings corresponding to the scale, the scale markings being used to identify the number of rotations of the adjusting ring.

[0011] A further embodiment of the electric coffee grinder includes a powder collection cup and a grinding module that includes a cup receiving ring. The cup receiving ring is threadedly connected to a stationary ring. The stationary ring has a guide groove on its lower end face away from the first housing. The outer periphery of the rotating ring has a protruding threaded portion. The threaded portion can move axially through the guide groove and is threadedly connected to an adjusting ring. The threaded portion can abut against the end face of the guide groove or the upper end face of the cup receiving ring in the axial direction of the rotating shaft to limit the movement of the threaded portion in the axial direction of the rotating shaft. The adjusting ring is rotatably clamped between the second housing and the cup sleeve ring of the cup receiving ring. The inner peripheral wall of the cup sleeve ring has multiple segmented threads protruding from it. The outer periphery of the open end of the powder collection cup has a continuous thread. The continuous thread and the segmented thread are detachably connected.

[0012] A further embodiment is that the outer periphery of the cup-connecting ring is provided with a first thread, the inner periphery of the stationary ring is provided with a second thread, the second thread is connected to the first thread, and the cross-sections of the second thread and the first thread are both arranged in a right-angled trapezoidal shape; and / or, the outer periphery of the stationary ring is provided with a third thread, the inner periphery of the second shell is provided with a fourth thread, the fourth thread is connected to the third thread, and the cross-sections of the fourth thread and the third thread are both arranged in an isosceles trapezoidal shape.

[0013] A further embodiment is that the grinding module also includes a mounting ring, which is axially movable within the ring hole of the stationary ring and threadedly connected to the first end of the rotating ring. The mounting ring has a first ring shoulder protruding from it, and the second end of the rotating ring has a second ring shoulder protruding from it. The outer grinding wheel is fixedly clamped in the mounting groove formed between the first ring shoulder and the second ring shoulder.

[0014] A further embodiment is that the grinding module also includes a first sealing ring, with a first groove on the outer periphery of the mounting ring, the first sealing ring being embedded in the first groove and pressing against the circumferential wall of the annular hole of the stationary ring; and / or, the grinding module also includes a second sealing ring, with the second end of the rotating ring being axially movable and inserted into the shaft hole of the cup receiving ring, and the second end of the rotating ring having a second groove on its outer periphery, the second sealing ring being embedded in the second groove and pressing against the circumferential wall of the shaft hole of the cup receiving ring.

[0015] A further embodiment includes a drive module that also includes a circuit board and a button cover. The circuit board is located inside the first housing and electrically connected to the motor. A push-button switch is provided on the circuit board. A key hole corresponding to the push-button switch is provided through the top of the first housing away from the second housing. Multiple ribs protrude from the peripheral wall of the key hole. The multiple ribs extend and are distributed circumferentially around the key hole. There is a positioning gap between two adjacent ribs. The button cover includes an elastic cover plate and an elastic ring connected around the elastic cover plate. The elastic ring is inserted into the key hole, and multiple clamping grooves are provided on the outer periphery of the elastic ring. One rib is embedded in one clamping groove. The positioning rib between two adjacent clamping grooves is located in the positioning gap. A boss protrudes from the inner side of the elastic cover plate. A reinforcing rib is connected between the boss and the elastic ring, and the boss can contact the push-button switch.

[0016] A further embodiment includes a circuit board with multiple light-emitting elements arranged side-by-side. The top of the first housing has multiple light-emitting holes, each corresponding to a light-emitting element. The driving module also includes a light guide strip. The outer end face of the top of the first housing has a receiving groove corresponding to the multiple light-emitting holes. The light guide strip is located within the receiving groove and extends in the side-by-side direction of the multiple light-emitting elements to cover them. Alternatively, the driving module also includes a battery and an elastic seal. The battery is located inside the first housing and electrically connected to the circuit board. A charging head is provided on the circuit board. The top of the first housing has a through slot corresponding to the charging head, and a mounting hole is also provided. The outer end face of the top of the first housing has a placement groove corresponding to the through slot and mounting hole. The elastic seal can be interference-fitted into the placement groove. An elastic connecting rod protrudes from the inner side of the first end of the elastic seal, and an elastic mushroom head is provided at the end of the elastic connecting rod. The elastic mushroom head passes through the mounting hole and can be fastened to the inner end face of the top of the first housing. A gripping part protrudes from the outer side of the second end of the elastic seal.

[0017] A further embodiment is that the outer peripheral surface of the first shell is provided with a plurality of first strip grooves, the plurality of first strip grooves are arranged in the circumferential direction of the first shell, and each first strip groove extends toward the second shell in the axial direction of the rotating shaft and penetrates the lower end surface of the first shell. The outer peripheral surface of the second shell is provided with a plurality of second strip grooves, one second strip groove is corresponding to one first strip groove in the axial direction of the rotating shaft and penetrates the upper end surface of the second shell.

[0018] A further embodiment is that the drive module also includes a connecting ring, with a first end of the connecting ring fixed inside the first housing, and a guide plate protruding from the first housing at the second end of the connecting ring. The guide plate extends circumferentially in the connecting ring and can be inserted into the second housing. A first hook is provided at one end of the guide plate in the circumferential direction of the connecting ring, and a second hook is provided protruding from the inner circumferential wall of the second housing. The first hook is detachably engaged with the second hook. Attached Figure Description

[0019] Figure 1 This is a structural diagram of an embodiment of the electric coffee bean grinder of this utility model.

[0020] Figure 2 This is a cross-sectional view of an embodiment of the electric coffee bean grinder of this utility model.

[0021] Figure 3 This is an exploded view of an embodiment of the electric coffee bean grinder of this utility model.

[0022] Figure 4 This is a first-view structural diagram of the drive module in an embodiment of the electric coffee bean grinder of this utility model.

[0023] Figure 5 This is a second-view structural diagram of the drive module in an embodiment of the electric coffee bean grinder of this utility model.

[0024] Figure 6 This is an exploded view of the drive module in an embodiment of the electric coffee bean grinder of this utility model.

[0025] Figure 7 This is a first-view sectional view of the drive module in an embodiment of the electric coffee bean grinder of this utility model.

[0026] Figure 8 This is a second-view sectional view of the drive module in an embodiment of the electric coffee bean grinder of this utility model.

[0027] Figure 9 This is a cross-sectional view of the button cover in an embodiment of the electric coffee bean grinder of this utility model.

[0028] Figure 10 This is a structural diagram of the button cover in an embodiment of the electric coffee bean grinder of this utility model.

[0029] Figure 11 This is a structural diagram of the grinding module in an embodiment of the electric coffee bean grinder of this utility model.

[0030] Figure 12 This is a first-view sectional view of the grinding module in an embodiment of the electric coffee bean grinder of this utility model.

[0031] Figure 13 yes Figure 12 Enlarged view at point A.

[0032] Figure 14 This is a second-perspective sectional view of the grinding module in an embodiment of the electric coffee bean grinder of this utility model.

[0033] Figure 15 This is a front view of the cup receiving ring in an embodiment of the electric coffee bean grinder of this utility model.

[0034] Figure 16 This is a cross-sectional view of the adjusting ring in an embodiment of the electric coffee bean grinder of this utility model.

[0035] Figure 17 This is an exploded view showing the coordination of the rotating shaft, inner grinding wheel, adjusting plate, and locking plate in an embodiment of the electric coffee bean grinder of this utility model.

[0036] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0037] See Figures 1 to 17 This embodiment discloses an electric coffee bean grinder 10, including a drive module 11 and a grinding module 12. The drive module 11 includes a first housing 111 and a motor 115 disposed in the first housing 111. The grinding module 12 includes a second housing 121, a rotating shaft 1216, an inner grinding wheel 127 and an outer grinding wheel 126. The rotating shaft 1216 is rotatably supported on a bracket 1213 of the second housing 121. The inner grinding wheel 127 is sleeved on the grinding end of the rotating shaft 1216. The driving end of the rotating shaft 1216 can be connected to the drive shaft 1151 of the motor 115. The outer grinding wheel 126 is sleeved on the outer periphery of the inner grinding wheel 127 and forms a grinding gap 120 between them. Furthermore, the grinding module 12 in this embodiment also includes an adjusting ring 122, a compression spring 1234, a spring post 1235, a moving ring 124, a spring 1215, an adjusting disc 1210, and a locking disc 129. The outer grinding wheel 126 is fixed on the moving ring 124. The adjusting ring 122 is rotatably supported on the second housing 121, and the adjusting ring 122 is threadedly connected to the moving ring 124 to control the axial movement of the moving ring 124 on the rotating shaft 1216. Multiple slots 1222 are formed on the inner circumference of the adjusting ring 122. The multiple slots 1222 are evenly distributed in the circumference of the adjusting ring 122. A stationary ring 123 is provided in the second shell 121. A limiting groove 1233 is formed on the outer circumference of the stationary ring 123. A compression spring 1234 is located in the limiting groove 1233 and elastically forces the spring post 1235 to extend out of the limiting groove 1233. The extended end of the spring post 1235 extending out of the limiting groove 1233 is embedded in a slot 1222. In addition, in this embodiment, the spring 1215 is sleeved on the rotating shaft 1216 and presses against the bracket 1213 and the inner grinding wheel 127. The adjusting plate 1210 is threaded onto the rotating shaft 1216. The positioning plate 129 is located between the inner grinding wheel 127 and the adjusting plate 1210 and is fixed on the inner grinding wheel 127. The positioning end face of the positioning plate 129 has multiple positioning grooves 1291, which are evenly distributed around the circumference of the positioning plate 129. The adjusting end face of the adjusting plate 1210 is provided with an elastic protrusion 12101, which is embedded in a positioning groove 1291.

[0038] In this embodiment, the electric coffee bean grinder 10, during use, rotates the adjusting ring 122. Since the adjusting ring 122 is rotatably supported on the second housing 121 and threadedly connected to the moving ring 124, the moving ring 124 can be synchronously controlled to move axially on the rotating shaft 1216 during the rotation of the adjusting ring 122. Since the outer grinding wheel 126 is fixed on the moving ring 124, the moving ring 124 moves axially on the rotating shaft 1216 to synchronously drive the outer grinding wheel 126 to move axially on the rotating shaft 1216, thereby adjusting the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127 to change the particle size of the ground coffee powder. Furthermore, in this embodiment, the inner circumference of the adjusting ring 122 is provided with multiple slots 1222, which are evenly distributed around the circumference of the adjusting ring 122. A stationary ring 123 is provided inside the second shell 121, and a limiting groove 1233 is provided on the outer circumference of the stationary ring 123. The compression spring 1234 is located in the limiting groove 1233 and elastically forces the spring post 1235 to extend out of the limiting groove 1233. The extended end of the spring post 1235 extending out of the limiting groove 1233 is embedded in a slot 1222. As the adjusting ring 122 rotates, the extended end of the spring post 1235 can elastically extend and retract to rotate out of the previous slot 122. 2. The outer grinding wheel 126 is screwed into the next slot 1222, thereby precisely adjusting the axial movement of the outer grinding wheel 126 on the rotating shaft 1216, and thus precisely adjusting the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127. During the process of rotating the adjusting ring 122 to adjust the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127, the user can clearly feel the switching between adjacent slots 1222, making the adjustment of the grinding gap 120 easily perceptible and improving the user experience. Furthermore, the extended end of the spring post 1235 on the second shell 121 in this embodiment can stably limit the position of the slot 1222 on the adjusting ring 122, thereby preventing slippage and resulting in adjustment errors in the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127, thus improving the adjustment accuracy of the grinding gap 120.

[0039] Furthermore, in this embodiment, the adjusting disc 1210 of the electric coffee bean grinder 10 is threaded onto the rotating shaft 1216. The locking disc 129 is located between the inner grinding wheel 127 and the adjusting disc 1210 and is fixed on the inner grinding wheel 127. The spring 1215 forces the inner grinding wheel 127 to drive the locking disc 129 to abut against the adjusting disc 1210. By rotating the adjusting disc 1210, the elastic protrusion 12101 of the adjusting disc 1210 can elastically deform and rotate out from the previous positioning groove 1291 on the locking disc 129 and screw into the next positioning groove. Within the positioning groove 1291, the inner grinding wheel 127 can be precisely adjusted to move axially along the rotating shaft 1216, thereby precisely adjusting the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127. During the process of rotating the adjusting disk 1210 to adjust the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127, a noticeable switching sensation between adjacent positioning grooves 1291 can be felt, allowing for a clear perception of the adjustment of the grinding gap 120, resulting in good sensitivity to the adjustment of the grinding gap 120. Furthermore, in this embodiment, the elastic protrusion 12101 on the adjusting disk 1210 can stably limit the positioning groove 1291 of the locking disk 129 fixed on the inner grinding wheel 127, thereby preventing slippage and ensuring that the grinding gap 120 between the outer grinding wheel 126 and the inner grinding wheel 127 does not experience adjustment errors, thus improving the adjustment accuracy of the grinding gap 120.

[0040] Therefore, the electric coffee bean grinder 10 in this embodiment can adjust the outer grinding wheel 126 and the inner grinding wheel 127 respectively, thereby expanding the adjustment range of the grinding gap 120 and accurately adjusting the grinding gap 120. Moreover, the adjustment of the grinding gap 120 is perceptible, thereby improving the user experience.

[0041] To further improve adjustment accuracy, in this embodiment, a scale 1221 is provided circumferentially on the outer peripheral surface of the adjustment ring 122, and a scale mark 1212 corresponding to the scale 1221 is provided on the outer peripheral surface of the second shell 121. The scale mark 1212 is used to identify the number of rotations of the adjustment ring 122. Specifically, in this embodiment, the scale 1221 has 90 scales to achieve adjustment of the grinding gap 120 in 360 / 90-minute increments.

[0042] Combination Figure 3 , Figures 11 to 16In this embodiment, the electric coffee bean grinder 10 also includes a powder collecting cup 13, and the grinding module 12 also includes a cup receiving ring 128. The cup receiving ring 128 is threadedly connected to the stationary ring 123. The stationary ring 123 has a guide groove 1232 on its lower end face away from the first shell 111. The outer periphery of the moving ring 124 has a threaded portion 1241 protruding. The threaded portion 1241 can move axially in the guide groove 1232 and is threadedly connected to the adjusting ring 122. The threaded portion 1241 can abut against the groove end face of the guide groove 1232 or the upper end face of the cup receiving ring 128 in the axial direction of the rotating shaft 1216 to limit the movement stroke of the threaded portion 1241 in the axial direction of the rotating shaft 1216, thereby improving the accuracy and stability of the moving ring 124 in the axial direction of the rotating shaft 1216. Furthermore, in this embodiment, the adjusting ring 122 is rotatably clamped between the second shell 121 and the cup sleeve ring 1281 of the cup receiving ring 128 to restrict the axial movement of the adjusting ring 122 on the rotating shaft 1216, thereby ensuring that the rotation of the adjusting ring 122 is smooth and reliable. In addition, in this embodiment, the inner peripheral wall of the cup sleeve ring 1281 is provided with multiple segmented threads 1283, and the outer peripheral of the open end of the powder collecting cup 13 is provided with a continuous thread 131. The continuous thread 131 and the segmented threads 1283 are detachably connected, so that when the powder collecting cup 13 is screwed onto the cup sleeve ring 1281, the tightening turns are few and fast, which facilitates the disassembly and assembly of the powder collecting cup 13, and makes it easy to clean, and it is not easy for powder residue to remain on the surface of the segmented threads 1283. In addition, in order to obtain delicious coffee, the coffee powder in the brewing container is tamped before brewing to compress the fluffy coffee powder into a cake. Therefore, the bottom of the powder collecting cup 13 in this embodiment can be used to tamp the coffee powder in the brewing container without the need for an additional tamper.

[0043] In this embodiment, the outer periphery of the cup-receiving ring 128 is provided with a first thread 1282, and the inner periphery of the stationary ring 123 is provided with a second thread 1232. The second thread 1232 is connected to the first thread 1282, and the cross-sections of both the second thread 1232 and the first thread 1282 are arranged in a right-angled trapezoidal shape, which can eliminate radial force. Therefore, when the threaded portion 1241 of the rotating ring 124 abuts against the upper end face of the cup-receiving ring 128 in the axial direction of the rotating shaft 1216, deformation of the first thread 1282 and the second thread 1232 can be avoided to prevent jamming, thus facilitating subsequent rotational adjustment. When the ring 122 controls the movement of the moving ring 124 in the axial direction of the rotating shaft 1216, it is labor-saving and smooth. If a triangular thread is used, when the threaded part 1241 of the moving ring 124 abuts against the upper end face of the cup ring 128 in the axial direction of the rotating shaft 1216, the radial force is large, the triangular thread is easily deformed and damaged, has poor durability, and is prone to deformation and jamming. Furthermore, when the ring 122 is rotated to control the movement of the moving ring 124 in the axial direction of the rotating shaft 1216, the grinding gap 120 is prone to become inconsistent due to the deformation of the triangular thread, which has an adverse effect on the subsequent adjustment of the grinding particle size.

[0044] Furthermore, in this embodiment, the outer periphery of the stationary ring 123 is provided with a third thread 1231, and the inner periphery of the second shell 121 is provided with a fourth thread 1217. The fourth thread 1217 is connected to the third thread 1231, and the cross-sections of both the fourth thread 1217 and the third thread 1231 are isosceles trapezoidal, which can eliminate radial force. Therefore, when the threaded portion 1241 of the rotating ring 124 abuts against the end face of the guide groove 1232 of the stationary ring 123 in the axial direction of the rotating shaft 1216, deformation of the third thread 1231 and the fourth thread 1217 can be avoided to prevent jamming, thus facilitating subsequent rotational adjustment. When the ring 122 controls the moving ring 124 to move axially on the rotating shaft 1216, it is labor-saving and smooth. If a triangular thread tooth is used, when the threaded part 1241 of the moving ring 124 abuts against the end face of the guide groove 1232 of the stationary ring 123 on the axial direction of the rotating shaft 1216, the radial force is large, the triangular thread tooth is easily deformed and damaged, has poor durability, and is prone to deformation and jamming. Furthermore, when the ring 122 is rotated to control the moving ring 124 to move axially on the rotating shaft 1216, the grinding gap 120 is prone to become inconsistent due to the deformation of the triangular thread tooth, which has an adverse effect on the subsequent adjustment of the grinding particle size.

[0045] In addition, the grinding module 12 in this embodiment also includes a mounting ring 125. The mounting ring 125 is movably located in the annular hole of the stationary ring 123 and threadedly connected to the first end of the rotating ring 124 in the axial direction of the rotating shaft 1216. The mounting ring 125 has a first shoulder 1251 protruding from it, and the second end of the rotating ring 124 has a second shoulder 1242 protruding from it. The outer grinding wheel 126 is fixedly clamped in the mounting groove formed between the first shoulder 1251 and the second shoulder 1242. Thus, the outer grinding wheel 126 can be fixedly installed on the rotating ring 124 without screws, making disassembly and assembly quick and easy.

[0046] To improve sealing, the grinding module 12 in this embodiment also includes a first sealing ring 1218. A first groove is provided on the outer periphery of the mounting ring 125. The first sealing ring 1218 is embedded in the first groove and presses against the annular wall of the stationary ring 123. The grinding module 12 in this embodiment also includes a second sealing ring 1219. The second end of the rotating ring 124 can be movably inserted into the shaft hole of the cup receiving ring 128 in the axial direction of the rotating shaft 1216. A second groove is provided on the outer periphery of the second end of the rotating ring 124. The second sealing ring 1219 is embedded in the second groove and presses against the annular wall of the shaft hole of the cup receiving ring 128.

[0047] Combination Figures 4 to 10In this embodiment, the drive module 11 also includes a circuit board 116 and a button cover 1120. The circuit board 116 is located inside the first housing 111 and is electrically connected to the motor 115. A push-button switch 1161 is provided on the circuit board 116. A key hole 1112 corresponding to the push-button switch 1161 is provided through the top of the first housing 111 away from the second housing 121. A plurality of protruding support ribs 1113 are provided on the peripheral wall of the key hole 1112. The plurality of protruding support ribs 1113 extend and are distributed circumferentially in the key hole 1112. There is a positioning gap 1114 between two adjacent protruding support ribs 1113. 120 includes an elastic cover plate 112 and an elastic ring 1122 connected around the elastic cover plate 112. The elastic ring 1122 is inserted into the key hole 1112, and multiple clamping grooves 1123 are provided on the outer periphery of the elastic ring 1122. A protruding support rib 1113 is embedded in a clamping groove 1123. The positioning rib 1124 between two adjacent clamping grooves 1123 is located in the positioning gap 1114. A boss 1121 is provided on the inner side of the elastic cover plate 112. A reinforcing rib 1125 is connected between the boss 1121 and the elastic ring 1122, and the boss 1121 can contact the push button switch 1161. Therefore, when the elastic cover plate 112 of the button cover 1120 in this embodiment is pressed, the boss 1121 can reliably trigger the button switch 1161 on the circuit board 116. Furthermore, a reinforcing rib 1125 is connected between the boss 1121 and the elastic ring 1122, which allows the boss 1121 to return to its original position away from the button switch 1161 under the elastic reset action of the elastic cover plate 112 when the pressing force is released, thereby improving the reliability of operation. In addition, the elastic ring 1122 of the button cover 1120 in this embodiment is stably supported on the protruding support rib 1113 in the key hole 1112 of the first shell 111, thereby improving the stability and reliability of operation.

[0048] Specifically, in this embodiment, the circuit board 116 is provided with a plurality of light-emitting elements 1162, which are arranged side by side. The top of the first shell 111 is provided with a plurality of light-emitting holes 1119, and one light-emitting hole 1119 is correspondingly provided with one light-emitting element 1162. The driving module 11 also includes a light guide strip 113. The outer end face of the top of the first shell 111 is provided with a receiving groove 1115 corresponding to the plurality of light-emitting holes 1119. The light guide strip 113 is located in the receiving groove 1115 and extends in the side-by-side direction of the plurality of light-emitting elements 1162 to cover the plurality of light-emitting elements 1162. Thus, the working status of the electric coffee bean grinder 10 can be quickly identified by the bright color displayed by the light guide strip 113.

[0049] Furthermore, in this embodiment, the drive module 11 also includes a battery 118 and an elastic seal 114. The battery 118 is located inside the first housing 111 and electrically connected to the circuit board 116. A charging head 1163 is provided on the circuit board 116. A through groove 1116 corresponding to the charging head 1163 is provided through the top end of the first housing 111, and a mounting hole 1117 is provided through the top end of the first housing 111. The outer end face of the top end of the first housing 111 is connected to the through groove 1116 and the mounting hole 1117. 117 is provided with a placement groove 1118, and the elastic seal 114 can be inserted into the placement groove 1118 with an interference fit. The inner side of the first end of the elastic seal 114 is provided with an elastic connecting rod 1142, and the end of the elastic connecting rod 1142 is provided with an elastic mushroom head 1143. The elastic mushroom head 1143 passes through the mounting hole 1117 and can be fastened to the inner end face of the top of the first shell 111. The outer side of the second end of the elastic seal 114 is provided with a gripping part 1141. When the battery 118 needs to be charged, the gripping part 1141 on the elastic seal 114 is grasped, and the elastic seal 114 is pulled out from the placement groove 1118. Because the elastic mushroom head 1143 at the end of the elastic connecting rod 1142 on the elastic seal 114 engages with the inner end face of the top of the first shell 111, the elastic seal 114 hangs on the first shell 111. After charging is completed, the elastic seal 114 is inserted into the placement groove 1118 with an interference fit to seal the charging head 1163 and prevent the charging head 1163 from being contaminated and affecting the charging performance.

[0050] To improve the aesthetics and make the electric coffee bean grinder 10 easier to grip, the outer peripheral surface of the first shell 111 in this embodiment is provided with a plurality of first strip grooves 1111. The plurality of first strip grooves 1111 are arranged in the circumferential direction of the first shell 111, and each first strip groove 1111 extends toward the second shell 121 in the axial direction of the rotating shaft 1216 and passes through the lower end surface of the first shell 111. The outer peripheral surface of the second shell 121 is provided with a plurality of second strip grooves 1211. One second strip groove 1211 is corresponding to one first strip groove 1111 in the axial direction of the rotating shaft 1216 and passes through the upper end surface of the second shell 121.

[0051] To facilitate disassembly and cleaning, the drive module 11 in this embodiment also includes a connecting ring 117. The first end of the connecting ring 117 is fixed inside the first housing 111, and the second end of the connecting ring 117 protrudes from the first housing 111 and is provided with a guide plate 1171. The guide plate 1171 extends circumferentially around the connecting ring 117 and can be inserted into the second housing 121. A first hook 1172 is provided at one circumferential end of the guide plate 1171, and a second hook 1214 protrudes from the inner circumferential wall of the second housing 121. The first hook 1172 is detachably engaged with the second hook 1214. During disassembly and assembly, the guide plate 1171 on the connecting ring 117 provides pre-positioning guidance, making the disassembly and assembly of the connecting ring 117 and the second housing 121 convenient and quick.

[0052] The above embodiments are merely preferred examples of this utility model and are not intended to limit the scope of implementation of this utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. An electric coffee bean grinder, comprising a drive module and a grinding module, the drive module comprising a first housing and a motor disposed within the first housing, the grinding module comprising a second housing, a rotating shaft, an inner grinding wheel, and an outer grinding wheel, the rotating shaft being rotatably supported on a bracket of the second housing, the inner grinding wheel being sleeved on the grinding end of the rotating shaft, the drive end of the rotating shaft being capable of engaging with the drive shaft of the motor, and the outer grinding wheel being sleeved on the outer periphery of the inner grinding wheel and forming a grinding gap between them, characterized in that: The grinding module further includes an adjusting ring, a compression spring, a spring post, a moving ring, a spring, an adjusting disc, and a locking disc. The outer grinding wheel is fixed on the moving ring. The adjusting ring is rotatably supported on the second housing, and the adjusting ring is threadedly connected to the moving ring to control the moving ring to move axially on the rotating shaft. The inner circumference of the adjusting ring has multiple locking slots, which are evenly distributed around the circumference of the adjusting ring. A stationary ring is provided inside the second housing. A limiting groove is provided on the outer circumference of the stationary ring. The compression spring is located in the limiting groove and elastically forces the spring post to extend out of the limiting groove. The extended end of the spring post extending out of the limiting groove is embedded in one of the locking slots. The spring is sleeved on the rotating shaft and presses against the bracket and the inner grinding wheel. The adjusting disc is threaded onto the rotating shaft. The positioning disc is located between the inner grinding wheel and the adjusting disc and is fixed on the inner grinding wheel. The positioning disc has multiple positioning grooves on its positioning end face. The multiple positioning grooves are evenly distributed around the circumference of the positioning disc. The adjusting end face of the adjusting disc has an elastic protrusion that is embedded in one of the positioning grooves.

2. The electric coffee bean grinder according to claim 1, characterized in that: The outer circumferential surface of the adjusting ring is provided with a scale, and the outer circumferential surface of the second shell is provided with a scale mark corresponding to the scale. The scale mark is used to identify the number of rotations of the adjusting ring.

3. The electric coffee bean grinder according to claim 1, characterized in that: The electric coffee bean grinder also includes a powder collecting cup, and the grinding module also includes a cup receiving ring. The cup receiving ring is threadedly connected to the stationary ring. The stationary ring has a guide groove on its lower end face away from the first shell. The outer periphery of the rotating ring has a threaded portion. The threaded portion can move axially through the guide groove and is threadedly connected to the adjusting ring. The threaded portion can abut against the groove end face of the guide groove or the upper end face of the cup receiving ring in the axial direction of the rotating shaft to limit the movement stroke of the threaded portion in the axial direction of the rotating shaft. The adjusting ring is rotatably clamped between the second shell and the cup sleeve ring of the cup receiving ring. The inner peripheral wall of the cup sleeve ring is provided with multiple segmented threads. The outer peripheral of the open end of the powder collecting cup is provided with a continuous thread. The continuous thread and the segmented thread are detachably connected.

4. The electric coffee bean grinder according to claim 3, characterized in that: The outer periphery of the cup receiving ring is provided with a first thread, and the inner periphery of the stationary ring is provided with a second thread. The second thread is connected to the first thread, and the cross-sections of the second thread and the first thread are both arranged in right-angled trapezoids. And / or, the outer periphery of the stationary ring is provided with a third thread, the inner periphery of the second shell is provided with a fourth thread, the fourth thread is connected to the third thread, and the cross-sections of the fourth thread and the third thread are both arranged in an isosceles trapezoidal shape.

5. The electric coffee bean grinder according to claim 3, characterized in that: The grinding module also includes a mounting ring, which is movably located in the annular hole of the stationary ring and threadedly connected to the first end of the rotating ring in the axial direction of the rotating shaft. The mounting ring has a first shoulder protruding from it, and the second end of the rotating ring has a second shoulder protruding from it. The outer grinding wheel is fixedly clamped in the mounting groove formed between the first shoulder and the second shoulder.

6. The electric coffee bean grinder according to claim 5, characterized in that: The grinding module also includes a first sealing ring, and a first groove is provided on the outer periphery of the mounting ring. The first sealing ring is embedded in the first groove and presses against the circumferential wall of the annular hole of the stationary ring. And / or, the grinding module further includes a second sealing ring, the second end of the moving ring being movably inserted into the shaft hole of the cup receiving ring in the axial direction of the rotating shaft, and a second groove is provided on the outer periphery of the second end of the moving ring, the second sealing ring being embedded in the second groove and pressing against the peripheral wall of the shaft hole of the cup receiving ring.

7. The electric coffee bean grinder according to claim 1, characterized in that: The drive module also includes a circuit board and a button cover. The circuit board is located inside the first housing and is electrically connected to the motor. A button switch is provided on the circuit board. A key hole corresponding to the button switch is provided through the top of the first housing away from the second housing. A plurality of protruding ribs are provided on the peripheral wall of the key hole. The plurality of protruding ribs extend and are distributed in the circumference of the key hole. There is a positioning gap between two adjacent protruding ribs. The button cover includes an elastic cover plate and an elastic ring connected around the elastic cover plate. The elastic ring is inserted into the key hole, and the outer periphery of the elastic ring is provided with a plurality of clamping grooves. One of the protruding ribs is embedded in one of the clamping grooves, and the positioning rib between two adjacent clamping grooves is located in the positioning gap. The inner side of the elastic cover plate has a protruding boss, and a reinforcing rib is connected between the boss and the elastic ring. The boss can contact the push-button switch.

8. The electric coffee bean grinder according to claim 7, characterized in that: The circuit board is provided with multiple light-emitting elements arranged side by side. The top of the first shell has multiple light-emitting holes, and each light-emitting hole corresponds to one light-emitting element. The driving module also includes a light guide strip. The outer end face of the top of the first shell has a receiving groove corresponding to the multiple light-emitting holes. The light guide strip is located in the receiving groove and extends in the side-by-side direction of the multiple light-emitting elements to cover the multiple light-emitting elements. And / or, the drive module further includes a battery and an elastic seal. The battery is located inside the first housing and electrically connected to the circuit board. A charging head is provided on the circuit board. A through slot corresponding to the charging head is provided through the top of the first housing, and a mounting hole is provided through the top of the first housing. A placement groove is provided on the outer end face of the top of the first housing corresponding to the through slot and the mounting hole. The elastic seal can be interference-fitted into the placement groove. An elastic connecting rod is provided protruding from the inner side of the first end of the elastic seal. An elastic mushroom head is provided at the end of the elastic connecting rod. The elastic mushroom head passes through the mounting hole and can be fastened to the inner end face of the top of the first housing. A gripping part is provided protruding from the outer side of the second end of the elastic seal.

9. The electric coffee bean grinder according to claim 1, characterized in that: The outer peripheral surface of the first shell is provided with a plurality of first strip grooves, which are arranged in the circumferential direction of the first shell, and each first strip groove extends toward the second shell in the axial direction of the rotating shaft and penetrates the lower end surface of the first shell. The outer peripheral surface of the second shell is provided with a plurality of second strip grooves, one of which is provided in the axial direction of the rotating shaft and corresponds to one of the first strip grooves and extends through the upper end surface of the second shell.

10. The electric coffee bean grinder according to any one of claims 1 to 9, characterized in that: The drive module further includes a connecting ring. The first end of the connecting ring is fixed inside the first housing, and the second end of the connecting ring protrudes from the first housing and is provided with a guide plate. The guide plate extends in the circumferential direction of the connecting ring and can be inserted into the second housing. The guide plate is provided with a first hook at one end in the circumferential direction of the connecting ring, and a second hook protrudes from the inner circumferential wall of the second housing. The first hook is detachably engaged with the second hook.

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