Bean grinding coffee machine capable of adjusting bean grinding gears by rotating bean box

Abstract

The invention discloses a bean grinding coffee machine capable of adjusting a bean grinding gear by rotating a bean box, belongs to coffee beverage manufacturing equipment, and aims to solve the problems that an existing bean grinding coffee machine adjusts the thickness of ground coffee powder through a rotary knob and a transmission structure which are independently arranged, the structure is complex, the assembly is tedious, and the manufacturing cost is high. A stop pin capable of stretching up and down is arranged at the top of the machine body, a pin hole is formed in the bean baffle, a pushing part is arranged on the box body, and the rotation range of the box body comprises a first continuous rotation angle and a second continuous rotation angle; when the box body rotates within a first rotation angle, the stop pin is inserted into the pin hole to brake the bean blocking plate so that the box body can rotate relative to the bean blocking plate to open or close the discharging opening, and when the box body rotates from the first rotation angle to a second rotation angle, the stop pin is pushed out of the pin hole by the pushing and abutting part. When the feed opening is kept open, the bean grinding gear is adjusted by changing the position of the second grinding wheel relative to the first grinding wheel through the box body. The structure is simple, the assembly is simplified, and the manufacturing cost is reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to coffee beverage manufacturing equipment, and particularly relates to a coffee grinder capable of adjusting grinding gears by rotating a bean box. BACKGROUND

[0002] The existing coffee grinder adjusts the fineness of ground coffee powder by a separately configured knob and transmission structure, which is complex in structure, cumbersome in assembly and high in manufacturing cost. SUMMARY

[0003] The present application provides a coffee grinder capable of adjusting grinding gears by rotating a bean box, so as to simplify the structure and assembly and reduce the manufacturing cost.

[0004] To achieve the above-mentioned purpose, the coffee grinder capable of adjusting grinding gears by rotating a bean box comprises a machine body, a grinding device arranged in the machine body, and a bean box detachably assembled on the top of the machine body. The grinding device comprises a first grinding wheel and a second grinding wheel. The first grinding wheel is driven by a motor, and the second grinding wheel is configured to be adjustable in position relative to the first grinding wheel. The bean box comprises a box body and a bean blocking plate. The box body is provided with a discharging port at the bottom and is rotatably assembled on the top of the machine body. The bean blocking plate is rotatably assembled on the bottom of the box body. The coffee grinder is characterized in that: The machine body is provided with a receiving sleeve for receiving the box body, and the top of the machine body is provided with a blocking pin capable of extending up and down. The bean blocking plate is provided with a pin hole, and the box body is provided with a pushing part. The rotation range of the box body comprises a first rotation angle and a second rotation angle. When the box body rotates within the first rotation angle, the blocking pin is inserted into the pin hole to brake the bean blocking plate, so that the box body rotates relative to the bean blocking plate to open or close the discharging port. When the box body rotates from the first rotation angle to the second rotation angle, the blocking pin is pushed out of the pin hole by the pushing part, so that the box body rotates with the bean blocking plate to keep the discharging port open and adjust the grinding gears by adjusting the position of the second grinding wheel relative to the first grinding wheel.

[0005] The coffee grinder can open or close the discharging port by rotating the box body, and can also adjust the fineness of ground coffee powder by adjusting the position of the second grinding wheel when the discharging port is open. The structure is simple, the assembly process can be simplified, and the manufacturing cost is reduced.

[0006] Preferably, the blocking pin is supported by a spring applying an upward elastic force. When the box body rotates from the first rotation angle to the second rotation angle, the pushing part extrudes the blocking pin to push the blocking pin out of the pin hole against the elastic force of the spring. When the box body rotates from the second rotation angle to the first rotation angle, the elastic force of the spring promotes the blocking pin to reset and insert into the pin hole. Accordingly, when the box body is rotated, the extension and retraction of the blocking pin will automatically occur without other actions.

[0007] Preferably, the blocking plate has a circular groove, and the pin hole is located at one end of the circular groove, and the pushing part is located in the circular groove when the box body rotates within the first rotation angle.

[0008] Regardless of whether the blocking plate closes or opens the discharge port, in order to fix the blocking plate in the corresponding position and prevent the blocking plate from rotating accidentally, in one embodiment, the blocking plate has a positioning groove, the box body is provided with a first positioning protrusion and a second positioning protrusion, the first positioning protrusion is clamped into the positioning groove when the blocking plate closes the discharge port, and the second positioning protrusion is clamped into the positioning groove when the blocking plate opens the discharge port. In particular, the blocking plate is provided with a pushing part, and the first positioning protrusion contacts the pushing part when the second positioning protrusion is clamped into the positioning groove, so as to push the blocking plate to rotate with the box body when the box body rotates from the first rotation angle to the second rotation angle. In this way, the resistance that the blocking plate receives when rotating with the box body can be overcome, and in particular, the blocking plate can be prevented from being retained at the original position due to the resistance and not rotating with the box body.

[0009] In another embodiment, the box body has a positioning groove, and the blocking plate is provided with a first positioning protrusion and a second positioning protrusion, the first positioning protrusion is clamped into the positioning groove when the blocking plate closes the discharge port, and the second positioning protrusion is clamped into the positioning groove when the blocking plate opens the discharge port. In particular, the box body is provided with a pushing part, and the pushing part contacts the first positioning protrusion when the second positioning protrusion is clamped into the positioning groove, so as to push the blocking plate to rotate with the box body when the box body rotates from the first rotation angle to the second rotation angle. In this way, the resistance that the blocking plate receives when rotating with the box body can be overcome, and in particular, the blocking plate can be prevented from being retained at the original position due to the resistance and not rotating with the box body.

[0010] Preferably, the top of the machine body has a recess formed by an inner circumferential wall, the lower end of the box body has an outer circumferential wall, the inner circumferential wall and the outer circumferential wall are separately provided with a clamping protrusion and a clamping groove, the clamping groove extends circumferentially and has a clamping entrance at one end for the clamping protrusion to be clamped into the clamping groove, and the first rotation angle and the second rotation angle are defined by the clamping groove. Accordingly, the rotation amplitude of the box body relative to the machine body is defined, the box body is kept in a certain position relative to the machine body, and position disorder is avoided.

[0011] Preferably, the second grinding wheel is arranged in a liftable wheel seat, the wheel seat is threadedly connected with a nut, and the nut rotates with the rotating sleeve. Accordingly, the rotation of the box body is converted into the lifting of the second grinding wheel through the rotation of the box body and the threaded connection.

[0012] Preferably, the rotating sleeve and the box body are separately provided with upward and downward facing embedding grooves and protrusions, and the protrusion is located in the embedding groove to connect the box body and the rotating sleeve. In order to rotate the rotating sleeve with the box body, open or close the discharge port, and change the working state of the safety switch at the same time. This structure is simple, and it is beneficial for the bean box to be quickly installed on and removed from the top of the machine body.

[0013] Preferably, a damping mechanism is applied to the rotation of the rotating sleeve. This damping is designed to prevent the turntable from rotating accidentally, especially from being rotated only by the box body when the box body rotates, thereby ensuring that the working state of the safety switch corresponds to the open or closed state of the discharge port, and avoiding erroneous changes in the state of the safety switch due to accidental rotation of the rotating sleeve.

[0014] Preferably, the push-off part uses the transition surface to push the stop pin out of the pin hole.

[0015] This invention features a rotating sleeve that receives the coffee grinder within the machine body. The top of the machine body has a retractable stop pin. A pin hole is provided on the bean-stopping plate, and a pushing part is provided on the coffee grinder. The rotation range of the coffee grinder includes a continuous first rotation angle and a second rotation angle. When the coffee grinder rotates within the first rotation angle, the stop pin inserts into the pin hole to brake the bean-stopping plate, causing the coffee grinder to rotate relative to the plate to open or close the feed inlet. When the coffee grinder rotates from the first rotation angle to the second rotation angle, the stop pin is pushed out of the pin hole by the pushing part, causing the coffee grinder, along with the bean-stopping plate, to rotate, keeping the feed inlet open. The coffee grinder also adjusts the position of the second grinding wheel relative to the first grinding wheel to adjust the grinding level. This coffee grinder allows for opening or closing the feed inlet by rotating the coffee grinder, and when the feed inlet is open, the position of the second grinding wheel can be adjusted by rotating the coffee grinder to adjust the coarseness of the ground coffee. Its simple structure simplifies the assembly process and reduces manufacturing costs. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the coffee grinder of the present invention; Figure 2 for Figure 1 A schematic diagram showing the coffee grinder with the bean hopper separated from the main body; Figure 3 This is a schematic diagram showing the cooperation relationship between the bean box and the bean grinding device of the present invention; Figure 4a This is a schematic diagram of the bottom structure of the bean box of the present invention; Figure 4b This is a schematic diagram of the bottom structure of the bean box of the present invention from another perspective; Figure 5a This is a schematic diagram of the upper side of the bean-blocking plate of the present invention; Figure 5b This is a schematic diagram of the upper side of the bean-blocking plate of the present invention from another perspective; Figure 6a This is a schematic diagram of the upper structure of the rotating sleeve of the present invention; Figure 6b This is a schematic diagram of the lower side of the rotating sleeve of the present invention; Figure 7a This is a schematic diagram showing the feed inlet of the box body of the present invention being closed by a bean-blocking plate; Figure 7bThe schematic view of the unloading port of the box body of the present application being opened by the blocking board after the box body is rotated by a first rotation angle; Figure 7c The schematic view of the unloading port of the box body of the present application being kept open after the box body is rotated by a second rotation angle with the blocking board; Figure 8a The schematic view of the position relationship between the safety switch and the rotating sleeve when the unloading port of the box body is closed by the blocking board; Figure 8b The schematic view of the position relationship between the safety switch and the rotating sleeve when the unloading port of the box body is opened by the blocking board; Figure 9 The schematic view of the cross-sectional structure of the grinding device of the present application; Label explanation in the figure: 1000 machine body, 1100 bean grinding device, 1101 first grinding wheel, 1102 second grinding wheel, 1103 motor, 1104 wheel seat, 1105 nut, 1200 safety switch, 1201 contact, 1300 rotating sleeve, 1301 embedding groove, 1302 avoiding groove, 1303 supporting surface, 1304 pushing column 1400 blocking pin, 1401 spring, 1500 inner peripheral wall, 1501 recess, 1502 clamping protrusion, 1600 top cover, 1700 support 1800 shell, 1900 funnel; 2000 bean box, 2100 box body, 2101 unloading port, 2102 protrusion, 2103 pushing part, 2104 first positioning protrusion, 2105 second positioning protrusion, 2106 outer peripheral wall, 2107 clamping groove, 2108 clamping entrance, a1 first rotation angle, a2 second rotation angle, 2200 blocking board, 2201 pin hole, 2202 circular arc groove, 2203 positioning groove, 2204 pushing assisting part, 2205 through hole. DETAILED DESCRIPTION

[0017] In order to make the purpose, technical scheme and advantages of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0018] The terms "comprising" and "having" and any variations thereof in the specification and claims of the present application are intended to cover a non-exclusive inclusion, for example, a process or an object that comprises a list of technical features without necessarily being limited to those technical features that are clearly listed, and can also include other technical features that are not clearly listed that can be included in the process or object.

[0019] In the description of the present application, it should be understood that the technical features defined by the terms "first", "second", etc. have a sequential concept, only for the purpose of clearly describing the defined technical features, so as to distinguish the defined technical features from other technical features, and do not represent the actual naming in the actual implementation, and therefore cannot be understood as a limitation of the present application.

[0020] The present application will be described in detail below in conjunction with specific embodiments and drawings.

[0021] Figures 1-2 A coffee grinder is shown, which comprises a body 1000 and a bean box 2000. A grinding device 1100 is arranged in the body 1000. Therefore, the grinding device can be regarded as a component of the body. The body further comprises a shell 1800 and a top cover 1600. The coffee grinder of the illustrated structure is further provided with a detachable hopper 1900 for receiving coffee powder, which is also regarded as a component of the body 1000. In other embodiments, the hopper can be configured to be non-detachable. The bean box 2000 is detachably assembled on the top of the body 1000, and the main body of the bean box 2000 is located on the upper side of the top cover 1600.

[0022] As shown in FIG. 1, Figure 9 the grinding device 1100 comprises a first grinding wheel 1101 and a second grinding wheel 1102, the first grinding wheel 1101 is driven by a motor 1103, and the second grinding wheel 1102 is configured to be adjustable in position relative to the first grinding wheel 1101. The gap between the first grinding wheel 1101 and the second grinding wheel 1102 is adjusted by adjusting the position of the second grinding wheel 1102, and accordingly the fineness of the coffee powder ground from the coffee beans is adjusted.

[0023] As shown in FIG. 1, Figure 3 the bean box 2000 comprises a box body 2100 as shown in FIG. 2, Figure 4a , Figure 4b and a bean blocking plate 2200 as shown in FIG. 2, Figure 5a , Figure 5b The bottom of the box body 2100 is provided with a discharging opening 2201. As shown in FIG. 2, Figure 2 the box body 2100 is rotatably assembled on the top of the body 1000. As shown in FIG. 2, Figure 3 the bean blocking plate 2200 is rotatably assembled on the bottom of the box body 2100 by a shaft.

[0024] In order to clearly express the shape of the discharging port, the discharging port 2101 in Figure 4b is expressed by a profile contour of a slant line. The bean blocking plate 2200 is provided with a through hole 2205, and in order to clearly express the shape of the through hole 2205, the through hole in Figure 5a is expressed by a profile contour of another dot line. When the box body 2100 is rotated to make the box body 2100 oppositely rotate relative to the bean blocking plate 2200, the through hole 2205 overlaps the discharging port 2101, as shown in Figure 7b , the discharging port 2101 is opened, and when the through hole 2205 is completely misaligned with the discharging port 2101, as shown in Figure 7a , the discharging port 2101 is closed.

[0025] Especially, as shown in Figure 3 , the machine body 1000 is provided with a rotating sleeve 1200 for receiving the box body 2100, and the top of the machine body 1000 is provided with a blocking pin 1400 which can be extended upward and downward.

[0026] Further, the bean blocking plate 2200 is provided with a pin hole 2201, and the box body 2100 is provided with a pushing portion 2103.

[0027] The rotation range of the box body 2100 includes a first rotation angle a1 and a second rotation angle a2, as shown in Figure 7a , Figure 7b . In Figure 7a , Figure 7b , the first rotation angle a1 and the second rotation angle a2 are defined by the rotation of the second positioning protrusion 2105. Further, in order to represent the cooperation between the box body and the bean blocking plate, the structure of the bean blocking plate is represented by a solid line, and the structure of the box body is represented by a dashed line, in Figure 7a , Figure 7b . When the box body is rotated from the state shown in Figure 7a to the state shown in Figure 7b to the state shown in Figure 7c , the box body is rotated in a clockwise direction. When the box body 2100 is rotated within the first rotation angle a1, i.e. when the box body is rotated between the state shown in Figure 7a and the state shown in Figure 7b , the blocking pin 1400 is inserted into the pin hole 2201 to brake the bean blocking plate 2200 to make the box body 2100 rotate relative to the bean blocking plate to open or close the discharging port 2101, and when the box body 2100 is rotated from the first rotation angle a1 to the second rotation angle a2, i.e. when the box body is rotated from the state shown in Figure 7b to the state shown in Figure 7cWhen rotated as shown, the stop pin 1400 is pushed out of the pin hole 2201 by the push part 2103, causing the box body 2100 and the bean-stopping plate 2200 to rotate, thereby keeping the feed inlet 2101 open. The box body 2100, along with the second grinding wheel 1102, adjusts its position relative to the first grinding wheel 1101 to adjust the grinding level. Therefore, by rotating the box body, the feed inlet can be opened or closed, and when the feed inlet is open, the position of the second grinding wheel can be adjusted by rotating the box body to adjust the coarseness of the coffee powder.

[0028] Therefore, by rotating the casing, the feeding port can be opened or closed. Furthermore, when the feeding port is open, rotating the casing again adjusts the position of the second grinding wheel to regulate the coarseness of the ground coffee powder. Its simple structure simplifies assembly and reduces manufacturing costs.

[0029] The above structure embodies the basic concept of the present invention, enabling the realization of the technical solution of the present invention. To further improve this coffee grinder, based on the above structure, the following preferred technical means can be selected to obtain better embodiments.

[0030] like Figure 3 , Figure 9 As shown, a spring 1401 that applies an upward elastic force to the stop pin 1400 is supported on it. When the box body 2100 rotates from the first rotation angle a1 to the second rotation angle a2, that is, from... Figure 7b The state shown Figure 7c When rotating in the indicated state, the pushing part 2103 presses against the stop pin 1400, overcoming the elastic force of the spring 1401 and pushing the stop pin out of the pin hole 2201. When the box body 2100 rotates from the second rotation angle to the first rotation angle, that is, from... Figure 7c The state shown Figure 7b When rotated in the indicated state, the elastic force of the spring 1401 causes the stop pin 1400 to return to its original position and insert into the pin hole 2201. Accordingly, when the box is rotated, the stop pin will extend or retract automatically without the need for other intervention.

[0031] like Figure 5a , Figure 5b As shown, the bean-blocking plate 2200 has an arc-shaped groove 2202, and the pin hole 2201 is located at one end of the arc-shaped groove 2202. When the box body 2100 rotates within the first rotation angle a1, that is, in Figure 7a The state shown is the same as Figure 7b When rotating between the shown states, the pushing part 2102 is located within the arcuate groove 2202. This provides space for the rotation of the pushing part.

[0032] Regardless of whether the bean baffle is closed or the feed inlet is open, in order to fix the bean baffle in the corresponding position and prevent it from rotating accidentally, Figure 5a , Figure 5b In the structure shown, the bean-blocking plate 2200 has a positioning groove 2203.Figure 4a , Figure 4b In the structure shown, the box 2100 is provided with a first positioning protrusion 2104 and a second positioning protrusion 2105. For example... Figure 7a When the bean baffle 2200 closes the feed inlet 2101, the first positioning protrusion 2104 engages with the positioning groove 2203, as shown. Figure 7b , Figure 7c When the bean-blocking plate 2200 opens the feed inlet 2101, the second positioning protrusion 2105 engages with the positioning groove 2203. In particular, in Figure 5a , Figure 5b In the structure shown, the bean-blocking plate 2200 is provided with a ribbed pusher part 2204, such as... Figure 7b When the second positioning protrusion 2105 is inserted into the positioning groove 2203, the first positioning protrusion 2104 contacts the pusher part 2204 to allow the box body 2100 to move from... Figure 7a The state shown Figure 7b When the rotation continues in the direction shown (i.e., from the first rotation angle a1 to the second rotation angle a2), the bean-stopping plate 2200 is pushed to rotate together with the box body 2100. This overcomes the resistance encountered by the bean-stopping plate when it rotates with the box body, and in particular, prevents the bean-stopping plate from getting stuck due to resistance. Figure 7b The position shown does not rotate with the box.

[0033] The positioning groove and the two positioning protrusions are interchangeable. Therefore, in other embodiments, the box body has a positioning groove, and the bean-blocking plate has a first positioning protrusion and a second positioning protrusion. When the bean-blocking plate closes the feed inlet, the first positioning protrusion engages with the positioning groove; when the bean-blocking plate opens the feed inlet, the second positioning protrusion engages with the positioning groove. At this time, the box body has a pushing part. When the second positioning protrusion engages with the positioning groove, the pushing part contacts the first positioning protrusion to push the bean-blocking plate to rotate with the box body when the box body rotates from the first rotation angle to the second rotation angle. This can overcome the resistance encountered by the bean-blocking plate when it rotates with the box body, and in particular, it can prevent the bean-blocking plate from remaining in place due to resistance and not rotating with the box body.

[0034] like Figure 2 As shown, the top of the housing 1000 has a recess 1501 formed by an inner peripheral wall 1500, which is formed on the support 1700. The lower end of the box 2100 has an outer peripheral wall 2106. The inner peripheral wall 1500 and the outer peripheral wall 2106 are respectively provided with a snap-fit ​​protrusion 1502 and a snap-fit ​​groove 2107. The snap-fit ​​groove 2107 extends circumferentially and has a snap-fit ​​inlet 2108 at one end for the snap-fit ​​protrusion 1502 to snap into the snap-fit ​​groove 2107. The first rotation angle a1 and the second rotation angle a2 are defined by the snap-fit ​​groove 2107. Accordingly, the rotation range of the box 2100 relative to the housing 1000 is defined, so that the box 2100 maintains a fixed position relative to the housing and avoids positional misalignment.

[0035] like Figure 9As shown, the second grinding wheel 2105 is an assembly, and the second grinding wheel 2105 is arranged in a wheel seat 1104 which is liftable and non-rotatable, and the lifting and non-rotating of the wheel seat 1104 is achieved by keeping the wheel seat 1104 and the support 1700 in lifting assembly and prohibiting the wheel seat from rotating relative to the support, and the wheel seat 1104 is threadedly connected with a nut 1105, and the sleeve is threadedly connected with the nut 1105 Figure 6b As shown, the downward pushing column 1304 is connected with the nut 1105, and thus the sleeve 1300 can rotate with the nut. Accordingly, the box body 2100 rotates with the sleeve 1300, and the sleeve rotates with the nut 1105, and since the wheel seat 1104 is non-rotatable, the nut 1105 drives the wheel seat 1104 to lift when the wheel seat 1104 is threadedly connected with the nut 1105, that is, the rotation of the box body is converted into the lifting of the second grinding wheel, so as to adjust the fineness of the ground coffee powder, or in other words, to adjust the grinding position of the coffee powder.

[0036] As shown in FIG. 10, Figure 4a , Figure 4b , Figure 6a , Figure 6b As shown, the sleeve 1300 and the box body 2100 are separately provided with upward and downward facing embedding grooves 1301 and protrusions 2102, and the protrusions 2102 are located in the embedding grooves 1301 so that the box body 2100 and the sleeve 1300 are connected, and the box body 2100 rotates with the sleeve 1300, and the safety switch changes the working state when the discharge port is opened or closed. The structure is simple, and the bean box can be quickly installed on and detached from the top of the machine body. In the structure shown in the figure, the protrusions 2102 and the embedding grooves 1301 are all three and have size differences, and thus it can be ensured that the bean box is installed on the top of the machine body in a unique posture.

[0037] Further, the rotation of the sleeve 1300 is provided with a damping mechanism. The damping is intended to prevent the sleeve from accidentally rotating, and only when the box body rotates, the sleeve is rotated with the box body, so as to ensure that the working state of the safety switch corresponds to the opening or closing state of the discharge port, and to avoid the safety switch being incorrectly changed due to accidental rotation of the sleeve. The damping mechanism can be matched by assembly relationship, such as the sleeve 1300 and the support 1700 in the machine body are in proper tight fit, and the sleeve can rotate relative to the support by relying on the elastic deformation of the support and the sleeve, and at the same time, the sleeve is damped. A damping member can also be applied to the sleeve, such as a damping pit and a marble are separately provided on the sleeve and the support, the marble is supported by a spring and located in the positioning pit, and when the sleeve rotates, the marble can exit the damping pit by overcoming the elastic force of the spring.

[0038] In order to smoothly push the blocking pin 1400 out of the pin hole 2201 by the pushing part 2103 when the box body rotates, the pushing part 2103 and the blocking pin 1400 are matched by a transition surface. As shown in FIG. 11, Figure 9As shown, the transition surface is embodied as a spherical surface on the upper end of the blocking pin 1400. In other embodiments, the transition surface can be a bevel surface provided on the upper end of the blocking pin 1400 or / and the lower end of the pushing portion 2103, when the box body rotates, the pushing portion 2103 applies pressure to the blocking pin via the transition surface to smoothly push the blocking pin 1400 out of the pin hole 2201, without being stuck.

[0039] In addition to the above structure, the present application is also provided with a hidden safety switch.

[0040] As shown in Figure 3 , Figure 8a , Figure 8b The safety switch 1200 is a normally open switch, the first working state is a normally open state, and the second working state is a normally closed state. When the discharge port 2101 is in the closed state, the safety switch 1200 is in the first working state, which disconnects the working circuit of the coffee machine, so that the coffee machine does not have the condition to start. When the discharge port 2101 is in the open state, the safety switch 1200 is in the second working state, which closes the working circuit of the coffee machine, so that the coffee machine has the condition to start. In other embodiments, the safety switch can be replaced by other structural form switches. Moreover, the safety switch only provides different signals for the circuit control board, and when the circuit control board receives different signals from the safety switch, it disconnects or closes the working circuit of the coffee machine.

[0041] Among them, the first working state and the second working state are two working states of the safety switch, and the change of the working state of the safety switch makes the coffee machine have or not have the condition to start. Among the first working state and the second working state of the safety switch, one state is normally open, and the other state is normally closed.

[0042] Among them, the change of the working state of the safety switch aims to provide a necessary condition for the start of the coffee machine, but not a sufficient condition, so that the safety switch aims to determine whether the coffee machine has the condition to start according to whether the bean box is installed in place and whether the bean box is opened. In addition, another safety switch can be configured to detect other parts of the coffee machine to set another necessary condition for the start of the coffee machine.

[0043] The coffee machine with a bean grinder, the safety switch is associated with the installation and opening of the bean box, and only when the bean box is installed in place and the bean box is opened, the state of the safety switch is changed to make the coffee machine have the condition to start, so as to avoid the idle running of the bean grinding device.

[0044] The coffee machine with a bean grinder, the safety switch is arranged in a hidden place in the machine body, and the safety switch is hidden to ensure that the safety switch is not short-circuited or damaged by external factors.

[0045] As shown in Figure 3 ,Figure 8a 、 Figure 8b As shown in FIG. 13, the main body of the sleeve 1300 is located in the body, and its upper end is exposed to the recess 1501 on the top of the body 1000. The safety switch 1200 is adjacent to the sleeve 1300, and the box body 2100 rotates with the sleeve 1300 to change the working state of the safety switch 1200. This changes the working state of the safety switch by the sleeve 1300 instead of the box body 2100, so that the safety switch is not exposed to the body and can be arranged in a more concealed position to ensure that the safety switch is not short-circuited or damaged by external factors. In the structure shown in the figure, the safety switch 1200 is located on the lower side of the sleeve 1300 and is shielded by the sleeve 1300 and the top cover 1600. In other embodiments, the safety switch can be located on the side of the sleeve 1300 and shielded by the top cover, thus being hidden and protected.

[0046] As shown in FIG. 13, in order to simplify the structure, the sleeve 1300 has a relief groove 1302 and a support surface 1303 adjacent to the relief groove. As shown in FIG. 14, the relief groove 1302 is a groove in the sleeve 1300, and the support surface 1303 is a surface adjacent to the relief groove 1302. Figure 6b Figure 8a 、 Figure 8b As shown in FIG. 13, the safety switch 1200 has a contact 1201. When the sleeve 1300 rotates, the contact 1201 is located in the relief groove 1302 or is pressed by the support surface 1303. As shown in FIG. 14, when the contact 1201 is located in the relief groove 1302, the safety switch 1200 is in a first working state, and as shown in FIG. 15, when the contact 1201 is pressed by the support surface 1303, the safety switch 1200 is in a second working state. Figure 8a Figure 8b As shown in FIG. 14, when the contact 1201 is located in the relief groove 1302, the safety switch 1200 is in a first working state, and as shown in FIG. 15, when the contact 1201 is pressed by the support surface 1303, the safety switch 1200 is in a second working state.​​

Claims

1. A coffee grinder that adjusts the grinding speed by rotating the bean hopper, comprising a body (1000), a grinding device (1100) disposed within the body, and a bean hopper (2000) detachably mounted on the top of the body. The grinding device (1100) includes a first grinding wheel (1101) and a second grinding wheel (1102). The first grinding wheel (1101) is driven by a motor (1103), and the second grinding wheel (1102) is configured to be adjustable relative to the first grinding wheel (1102). The bean hopper (2000) includes a hopper body (2100) and a bean baffle (2200). The hopper body (2100) has a feed inlet (2101) at its bottom. The hopper body (2100) is rotatably mounted on the top of the body (1000), and the bean baffle (2200) is rotatably mounted on the bottom of the hopper body (2100). Its characteristics are: The body (1000) is equipped with a rotating sleeve (1300) that supports the box (2100), and the top of the body (1000) is provided with a vertically retractable stop pin (1400). The bean-blocking plate (2200) is provided with a pin hole (2201), and the box body (2100) is provided with a pushing part (2103). The rotation range of the box body (2100) includes a continuous first rotation angle (a1) and a second rotation angle (a2). When the box body (2100) rotates within the first rotation angle (a1), the stop pin (1400) is inserted into the pin hole (2201) to brake the bean-blocking plate (2200) and cause the box body (2100) to rotate relative to the bean-blocking plate (2200) to open. When the feed inlet (2101) is opened or closed, the box body (2100) rotates from the first rotation angle (a1) to the second rotation angle (a2). The stop pin (1400) is pushed out of the pin hole (2201) by the push part (2103), causing the box body (2100) to rotate with the bean baffle (2200) to keep the feed inlet (2101) open. The box body (2100) and the second grinding wheel (1102) are adjusted relative to the first grinding wheel (1101) to adjust the grinding level.

2. The coffee grinder according to claim 1, characterized in that: A spring (1401) that applies an upward elastic force to the stop pin (1400) is supported on it. When the box body (2100) rotates from the first rotation angle (a1) to the second rotation angle (a2), the pushing part (2103) presses the stop pin (1400) and pushes the stop pin (1400) out of the pin hole (2201) by overcoming the elastic force of the spring (1401). When the box body (2100) rotates from the second rotation angle (a2) to the first rotation angle (a1), the elastic force of the spring (1401) causes the stop pin (1400) to reset and insert into the pin hole (2201).

3. The coffee grinder according to claim 1, characterized in that: The bean-blocking plate (2200) has an arc groove (2202), and the pin hole (2201) is located at one end of the arc groove (2202). When the box body (2100) rotates within the first rotation angle (a1), the pushing part (2103) is located in the arc groove (2202).

4. The coffee grinder according to claim 1, characterized in that: The bean-blocking plate (2200) has a positioning groove (2203), and the box body (2100) has a first positioning protrusion (2104) and a second positioning protrusion (2105). When the bean-blocking plate (2200) closes the feeding port (2101), the first positioning protrusion (2104) is engaged in the positioning groove (2203). When the bean-blocking plate (2200) opens the feeding port (2101), the second positioning protrusion (2105) is engaged in the positioning groove (2203).

5. The coffee grinder according to claim 4, characterized in that: The bean-blocking plate (2200) is provided with a pusher (2204). When the second positioning protrusion (2105) is inserted into the positioning groove (2203), the first positioning protrusion (2104) contacts the pusher (2204) to push the bean-blocking plate (2200) to rotate together with the box body (2100) when the box body (2100) rotates from the first rotation angle (a1) to the second rotation angle (a2).

6. The coffee grinder according to claim 1, characterized in that: The box body has a positioning groove, and the bean-blocking plate has a first positioning protrusion and a second positioning protrusion. When the bean-blocking plate closes the feeding port, the first positioning protrusion is engaged in the positioning groove, and when the bean-blocking plate opens the feeding port, the second positioning protrusion is engaged in the positioning groove.

7. The coffee grinder according to claim 6, characterized in that: The box body is provided with a pusher part. When the second positioning protrusion is engaged in the positioning groove, the pusher part contacts the first positioning protrusion so that when the box body rotates from the first rotation angle to the second rotation angle, it pushes the bean baffle plate to rotate together with the box body.

8. The coffee grinder according to claim 1, characterized in that: The top of the body (1000) has a recess (1501) formed by the inner peripheral wall (1500), and the lower end of the box (2100) has an outer peripheral wall (2106). The inner peripheral wall (1500) and the outer peripheral wall (2106) are provided with a snap-fit ​​protrusion (1502) and a slot (2107) respectively. The slot (2107) extends circumferentially and has a snap-fit ​​inlet (2108) at one end for the snap-fit ​​protrusion (1502) to snap into the slot (2107). The first rotation angle (a1) and the second rotation angle (a2) are defined by the slot (2107).

9. The coffee grinder according to claim 1, characterized in that: The second grinding wheel (1102) is disposed in a liftable wheel seat (1104), the wheel seat (1140) and a nut (1105) are threaded together, and the nut (1105) is rotated by the rotating sleeve (1300).

10. The coffee grinder according to claim 1, characterized in that: The rotating sleeve (1300) and the box body (2100) are provided with an upper and lower facing groove (1301) and a protrusion (2102), respectively. The protrusion (2102) is located in the groove (1301) so that the box body (2100) and the rotating sleeve (1300) can be connected.

11. The coffee grinder according to claim 1, characterized in that: A damping mechanism is applied to the rotation of the rotating sleeve (1300).

12. The coffee grinder according to claim 1, characterized in that: The pusher (2103) pushes the stop pin (1400) out of the pin hole (2201) by means of the transition surface.

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