Bean grinder and bean grinder appliance

Abstract

The utility model relates to a kind of bean grinder and bean grinder electric appliance, and bean grinder includes: bean bin, the lower part of this bean bin has installation part, the bottom of this installation part has bean outlet, the bean outlet is equipped with bean sealing plate;Adjusting assembly, including fixed ring, rotating ring and adjusting ring;Between the fixed ring and the rotating ring, there is also the first locking component for limiting the relative rotation of both, the installation part of the bean bin also has the first unlocking portion for releasing the locking state of the first locking component, bean grinder can complete the opening and closing of bean outlet and grinding gap adjustment by the single action of bean bin rotation, simplify user operation, while by using the cooperation of locking component and unlocking actuating portion, the opening action of the bean outlet of bean bin and grinding gap adjustment can be sequentially performed with the rotation of bean bin, prevent accidental change of grinding gap caused by misoperation, ensure the reliability and operation coherence of locking and unlocking action in the adjustment process, improve safety.

Description

Technical Field

[0001] This utility model relates to the field of coffee grinding device technology, and in particular to a coffee grinding device and a coffee grinding appliance. Background Technology

[0002] Existing coffee grinding appliances, such as coffee grinders or automatic coffee machines, all have a grinding device. This device grinds coffee beans into powder, and typically includes a bean hopper and a grinding system. During the coffee brewing process, the coarseness of the coffee grounds is a crucial factor affecting the flavor of the extracted coffee; different types of coffee require different grind sizes.

[0003] Coffee grinding devices typically employ a dual-blade working structure, consisting of a rotating moving blade and a fixed stationary blade forming the grinding core. During operation, coffee beans are placed in the grinding gap formed by the two blades, and the moving blade is rotated by a motor to pulverize and grind them. For adjusting the grind size, traditional designs use an independent adjustment mechanism: a rotatable adjustment knob is located externally to the device. This knob is mechanically linked to the stationary blade via a gear transmission system; rotating the knob changes the position of the stationary blade, thus adjusting the grinding gap. This conventional design has significant structural flaws, primarily due to the need for an additional dedicated adjustment mechanism component. This not only increases the overall structural complexity of the machine but also significantly increases the difficulty of the assembly process.

[0004] Traditional coffee grinders have a coffee hopper that is locked to the machine body in a certain way. Users can loosen the coffee hopper assembly in a certain way, but the opening at the bottom of the coffee hopper assembly cannot be closed. When the user removes the coffee hopper, the coffee beans remaining in the coffee hopper will fall out from the opening. This means that the user can only empty the coffee beans from the coffee hopper assembly by flipping the coffee machine before removing the coffee hopper, which is very inconvenient. There are also devices that allow the coffee bean hopper to be removed and temporarily store coffee beans. For example, Chinese invention patent application CN116919161A discloses a coffee machine bean hopper sealing device. The bottom of the bean hopper of the sealing device is equipped with a fixing plate, which is fixedly installed on the mounting plate on the top of the top cover via a knob. When the locking block of the mounting plate rotates clockwise, it engages with the arc-shaped actuating groove of the fixing plate. At the same time, the positioning pin of the mounting plate passes through the guide hole and inserts into the force groove of the sealing plate at the bottom of the bean hopper. Continuing to rotate the bean hopper clockwise, the positioning pin of the mounting plate moves the sealing plates on both sides of the bottom of the bean hopper outward through the guide hole of the fixing plate and the force groove of the sealing plate, opening the outlet at the bottom of the bean hopper. The coffee beans in the bean hopper enter the grinding assembly through the first through hole of the fixing plate. The lower gear ring of the knob meshes with the upper gear ring of the grinding disc. The knob adjusts the coarseness of the grind by rotating the knob on one side.

[0005] However, the grinding device in the aforementioned patent application CN116919161A has certain shortcomings: the opening and closing of the sealing plate at the bottom of the bean box is achieved by rotating the bean box, while the coarseness adjustment of the grinding system is achieved by rotating a knob on the outside. The two actions are relatively independent, and the operation is inconvenient due to the multiple actions involved, sometimes requiring both hands. In particular, the knob structure on the knob panel protrudes from the outer wall of the machine, making the entire machine look uncoordinated and unsightly. Utility Model Content

[0006] The first technical problem to be solved by this utility model is to provide a bean grinding device that can effectively simplify the opening and closing action of the bean sealing plate and the action of adjusting the grinding fineness, in light of the current state of the technology.

[0007] The second technical problem to be solved by this utility model is to provide a coffee grinding appliance that uses the above-mentioned coffee grinding device, which can be a coffee grinder or a coffee machine that also has a coffee grinding function, in view of the current state of the prior art.

[0008] The technical solution adopted by this utility model to solve the first technical problem mentioned above is: a bean grinding device, comprising:

[0009] The bean hopper has a mounting part at its lower part, and a bean drop opening at the bottom of the mounting part. A bean sealing plate is provided at the bean drop opening, which can slide relative to the mounting part of the bean hopper. The bean sealing plate can open and close the bean drop opening as its position relative to the bean hopper changes.

[0010] The adjustment assembly includes a fixed ring, a rotating ring, and an adjustment ring. The fixed ring is fixed relative to the main body of the grinding appliance. The rotating ring is located below the fixed ring and can rotate around its own axis relative to the fixed ring. The internal space of the rotating ring defines an installation channel for the mounting part of the bean hopper to be rotatably inserted into. The adjustment ring is convectively connected to the rotating ring and can be driven by the rotating ring to rotate around its own axis. The adjustment ring is convectively connected to the grinding assembly of the grinding device and is driven by the adjustment ring to adjust the grinding gap of the grinding assembly.

[0011] When the bean hopper is positioned in the mounting hole of the grinding device, the rotating ring and the sealing plate are limited in the rotation direction of the bean hopper by a limiting structure. A first locking component is provided between the fixed ring and the rotating ring to limit their relative rotation. The mounting part of the bean hopper also has a first unlocking part for releasing the locking state of the first locking component. The rotational installation process of the mounting part of the bean hopper in the mounting hole has an unlocking position to release the lock between the fixed ring and the rotating ring, a first rotation path before the unlocking position, and a second rotation path after the unlocking position. In the first rotation path, the rotating ring is locked relative to the fixed ring by the first locking component. The sealing plate can move relative to the bean hopper to open the bean drop opening under the limitation of the rotating ring. When the mounting part of the bean hopper is in the unlocked position, the first unlocking part acts on the first locking component to release the lock of the fixed ring on the rotating ring, thereby allowing the rotating ring to rotate together with the mounting part of the bean hopper in the second rotation path to adjust the grinding gap of the grinding component.

[0012] The direction in which the bean sealing plate moves relative to the bean bin can be a straight line, such as moving in a direction parallel to the radial direction of the bean drop opening.

[0013] The "first locking component" used to limit the relative rotation between the fixed ring and the rotating ring can employ various locking structures in the prior art that can limit the relative rotation between the fixed ring and the rotating ring and can be unlocked. For example, it can be a convex-buckle positioning notch fit structure, in which positioning notches such as positioning holes are set at corresponding positions on the fixed ring and the rotating ring, and locking is achieved by inserting a convex buckle such as a spring pin into the hole; when unlocking, the pin is pressed or pulled out of the hole; it can also be a "ratchet-pawl fit structure", in which ratchet teeth are provided on the rotating ring and elastic pawls are installed on the fixed ring, allowing for one-way or two-way locking; when unlocking, the pawl is disengaged from the tooth groove by moving it.

[0014] The grinding device can open and close the bean dropper and adjust the grinding gap with a single rotation of the bean hopper, simplifying user operation. At the same time, by using the cooperation of the locking component and the unlocking actuator, the opening of the bean dropper and the adjustment of the grinding gap can be carried out sequentially with the rotation of the bean hopper, preventing accidental changes in the grinding gap due to misoperation, ensuring the reliability and continuity of the locking and unlocking actions during the adjustment process, and improving safety.

[0015] In the second rotation path, in order to enable the rotating ring to rotate in both the forward and reverse rotation of the bean hopper, thereby achieving the purpose of bidirectional adjustment of the grinding gap, a second locking component for limiting the relative rotation of the two is provided between the mounting part of the bean hopper and the rotating ring, and a second unlocking part for releasing the locking state of the second locking component is provided on the fixed ring or the main body of the bean grinder.

[0016] The installation part of the bean hopper has an initial position, an unlocking position and an end position during the rotational installation process in the installation channel. The path between the initial position and the unlocking position is called the first rotational path, and the path between the unlocking position and the end position is called the second rotational path.

[0017] Along the rotational installation direction of the bean hopper, in the first rotational path, the rotating ring is locked relative to the fixed ring by the first locking component. The bean sealing plate can move relative to the bean hopper to open the bean drop opening under the limitation of the rotating ring. When the installation part of the bean hopper is in the unlocked position, the first unlocking part acts on the first locking component to release the fixed ring from locking the rotating ring. The bean hopper and the rotating ring are locked together by the second locking component, thereby allowing the rotating ring to rotate together in the second rotational path driven by the installation part of the bean hopper to adjust the grinding gap of the grinding component, and keeping the bean sealing plate in the open bean drop opening state.

[0018] Along the rotational exit direction of the bean hopper, in the second rotational path, the bean hopper and the rotating ring are locked together by the second locking component. The mounting part of the bean hopper drives the rotating ring to rotate together to adjust the grinding gap of the grinding component. When the mounting part of the bean hopper is in the unlocked position, the second unlocking part acts on the second locking component to release the lock between the bean hopper and the rotating ring. The fixed ring and the rotating ring are locked together by the first locking component, thereby allowing the bean hopper to rotate relative to the rotating ring in the first rotational path, so that the bean sealing plate can move relative to the bean hopper to close the bean drop opening under the limit of the rotating ring.

[0019] The "initial position" mentioned above can be understood as the position where the bean hopper's mounting part is just inserted into the mounting hole; the "end position" mentioned above can be understood as the position when the bean hopper is rotated to its limit position in the rotational mounting direction after being inserted into the mounting hole, or it can be immediately understood as the maximum adjustable grinding gap position, generally the minimum position. The unlock position is located between the initial position and the end position mentioned above.

[0020] As an improvement, a first limiting slide extending circumferentially is constructed on the inner peripheral wall of the mounting hole, and a first limiting protrusion protruding outward is provided on the outer peripheral wall of the mounting part of the bean hopper. The first limiting protrusion can be inserted into the first limiting slide and moves along the first limiting slide as the bean hopper rotates.

[0021] When the first limiting protrusion moves to its limit position in the first limiting slide along the rotational installation direction of the bean hopper, the first limiting protrusion acts on the first locking component to release the locking of the fixed ring on the rotating ring. The first limiting protrusion constitutes the first unlocking part. In the second rotation path, the first limiting protrusion abuts against the end periphery of the first limiting slide and drives the rotating ring to rotate together, thereby adjusting the grinding gap of the grinding component.

[0022] The aforementioned "limit position" refers to the position where the first limit slider is restricted by the corresponding structure of the first limit slide (generally abutting against the end of the first limit slide) and cannot continue to slide along the first limit. This design can ensure that after the lock between the fixed ring and the rotating ring is released by the first limit slider, the rotating ring can be driven to rotate immediately, ensuring the continuity between the unlocking action and the action of driving the rotating ring to move.

[0023] The bean hopper and the adjustment component can be detached and installed by the cooperation of the first limiting slide and the first limiting protrusion. On this basis, the above-mentioned cooperation structure can ensure that the first limiting protrusion of the bean hopper can only rotate along the preset path, and the first limiting protrusion will trigger unlocking when it moves to the limit position, which simplifies the overall structure of the bean grinding device.

[0024] To achieve reliable locking and unlocking of the fixed ring and the rotating ring through a simplified locking structure, the first limiting slide extends from the inner wall of the rotating ring to its outer wall. The first locking assembly includes a locking member, a first spring, and a locking engagement portion on the rotating ring. The locking member is movably mounted on the fixed ring and positioned outside the first limiting slide. The locking engagement portion is located on the outer wall of the rotating ring and adjacent to the end of the first limiting slide. Under the action of the first spring, the locking member always tends to move inward toward the rotating ring and lock with the locking engagement portion. The locking member defines a limiting notch on one side facing the rotating ring, and the locking engagement portion is a protruding buckle extending outward from the outside of the rotating ring. The spring-driven design of the locking member and the locking engagement portion ensures a stable locking state. Unlocking requires external force applied by the first limiting protrusion to prevent accidental unlocking.

[0025] As an improvement, the locking member, on one side facing the rotating ring, defines a first guide slope and a second guide slope corresponding to the areas on the left and right sides of the limiting recess. The first and second guide slopes are configured such that, during the reciprocating movement of the first limiting protrusion along the first limiting slide, the corresponding first and second guide slopes guide the first limiting protrusion to apply radial outward pressure to the locking member. This design of the first and second guide slopes allows the first limiting protrusion to naturally push open the locking member during movement, reducing operational effort and improving the user experience.

[0026] To prevent the bean hopper from moving relative to the rotating ring due to reverse rotation after installation, a second limiting slide extending circumferentially is constructed on the inner peripheral wall of the mounting hole. The outer peripheral wall of the mounting part of the bean hopper has a second limiting protrusion protruding outward. The second limiting protrusion can be inserted into the second limiting slide and moves along the second limiting slide as the bean hopper rotates. When the first limiting protrusion moves to its limit position along the rotational installation direction of the bean hopper in the first limiting slide, the second limiting protrusion also moves to its limit position along the rotational installation direction of the bean hopper in the second limiting slide.

[0027] The second locking component is disposed on the rotating ring and is used to restrict the movement of the second limiting protrusion relative to the rotating ring in the withdrawal direction. The second locking component includes a stop latch and a second spring. The stop latch is movably disposed on the rotating ring at an end position adjacent to the installation direction of the second limiting slide, and forms a stop position with the end periphery of the second limiting slide to accommodate the second limiting protrusion. Under the action of the second spring, the stop latch always has a tendency to move towards the second limiting slide to stop the second limiting protrusion located at the stop position. The cooperation between the second limiting slide and the second locking component, by forming a stop position to restrict the withdrawal movement of the second limiting protrusion, ensures that the bean hopper will not easily detach from the rotating ring and move independently in at least a part of the path in the rotation withdrawal direction (corresponding to the reverse movement process of the second rotation path), thus ensuring the synchronicity of the reverse movement of the bean hopper and the rotating ring.

[0028] The stop latch forms a third guide slope on the side facing the second limiting protrusion. The third guide slope is configured such that, during the rotational installation direction of the second limiting protrusion along the second limiting slide, the third guide slope guides the second limiting protrusion to apply pressure to the stop latch in a direction away from the second limiting slide, and moves past the stop latch to the stop position.

[0029] To simplify the structure of the second locking assembly, a fixed seat is provided at the end of the rotating ring adjacent to the installation direction of the second limiting slide. The stop lock is movably limited on the fixed seat. The stop lock includes a first protruding part located inside the second limiting slide and a second protruding part located outside the second limiting slide. The bottom of the fixed ring also has a downwardly extending limiting rib. The top of the second protruding part and the bottom of the limiting rib are engaged by a guide bevel, so that the stop lock can be driven downward by the limiting rib and release the first protruding part from limiting the second limiting protrusion in the rotational exit direction. The linkage design of the first and second protruding parts, combined with the pressure of the limiting rib, allows the user to release the stop lock from limiting the second limiting protrusion during the reverse rotation of the bean hopper, facilitating the disassembly and maintenance of the bean hopper.

[0030] The aforementioned first and second limiting slides can be disposed on a single component of the rotating ring, or they can be formed by the rotating ring and the fixed ring together. In a preferred embodiment, the rotating ring has an upwardly extending first ring wall, the top of which has a downwardly recessed first arc-shaped notch and a second arc-shaped notch extending circumferentially. The inner wall of the fixed ring has an annular protrusion extending radially inward. When the fixed ring and the rotating ring are assembled in place, the wall of the fixed ring corresponding to the lower part of the annular protrusion is sleeved on the outer periphery of the first ring wall. The annular protrusion abuts against the top of the first ring wall and, together with the first arc-shaped notch, defines the first limiting slide, and together with the second arc-shaped notch, defines the second limiting slide. The annular protrusion also has a first mounting notch that extends vertically to allow the first limiting protrusion to enter the first limiting slide and a second mounting notch that extends vertically to allow the second limiting protrusion to enter the second limiting slide. The annular protrusion engages with the notch in the first annular wall to form the installation space of the corresponding limiting slide, and guides the limiting protrusion into place through the first and second installation notches, thereby improving assembly efficiency.

[0031] To provide reliable positioning feedback during the initial installation phase of the bean hopper or when the bean hopper is moved back to its initial position, thus improving the user experience, a latching tongue assembly is also included on the fixing ring. The latching tongue assembly is located at the initial end of the first limiting slide rail in the rotational installation direction and includes a latching tongue movably mounted on the fixing ring and a third spring. The third spring acts on the latching tongue, causing it to always tend to move towards the first limiting slide rail. Alternatively, the latching tongue assembly is located at the initial end of the second limiting slide rail in the rotational installation direction and includes a latching tongue movably mounted on the fixing ring and a third spring. The third spring acts on the latching tongue, causing it to always tend to move towards the second limiting slide rail. The latching tongue assembly cooperates with the corresponding limiting protrusion to generate tactile or auditory feedback (such as a clicking sound and vibration) when the bean hopper rotates to its initial position, prompting the user to rotate and move it into place.

[0032] To simplify the limiting structure between the bean hopper and the rotating ring, the bean hopper includes a main body with an open bottom and a mounting base located at the bottom of the main body. The mounting base constitutes the mounting part of the bean hopper. The bean sealing plate is located between the mounting base and the main body of the bean hopper. The inner peripheral wall of the rotating ring forms an inwardly extending step and a positioning post extending upward from the top of the step. The bean sealing plate has a positioning recess for the positioning post to be inserted into. When the bean hopper is positioned in the mounting hole of the grinding device, the positioning post is inserted into the positioning recess. As the bean hopper rotates, the positioning post and the positioning recess limit the bean opening of the bean drop opening. The positioning post and the positioning recess together constitute the limiting structure between the rotating ring and the bean sealing plate. The bottom wall of the mounting base also has an arc-shaped clearance for the positioning post to rotate and move. The cooperation between the positioning column and the positioning recess converts the rotation of the bean hopper into the linear movement of the bean sealing plate. The arc-shaped clearance provides space for the positioning column to move, ensuring smooth operation.

[0033] While a single set of bean-sealing plate assemblies can be used, the fixed size of the bean-feeding opening necessitates a significant travel distance for the sealing plate to fully open and close. To better adapt to the rotation of the bean hopper, the mounting base features two symmetrically arranged sets of sealing plate assemblies. Each set includes the sealing plate and a first elastic element. The two sealing plates can move away from each other to open the bean-feeding opening and move closer together to close it. The two first elastic elements act on the sealing plates, causing them to tend to move closer together. The double sealing plates move closer together under the action of the first elastic elements, resulting in better sealing when closed; symmetrical force distribution during opening and closing reduces the risk of jamming.

[0034] To more intuitively display the current grinding gap status and facilitate quick user adjustments, the outer peripheral wall of the fixing ring has circumferentially arranged scale markings. Correspondingly, an arrow marking the outer wall of the bean hopper, located above the scale markings, is also provided. As the bean hopper rotates to different positions, the arrow points to different positions on the scale markings, indicating the current grinding gap of the grinding assembly. The combination of the scale markings and the arrow markings provides a visual indication of the grinding gap, enhancing user convenience.

[0035] The technical solution adopted by this utility model to solve the second technical problem mentioned above is as follows: a coffee grinder, including a body and a grinding device disposed on the body, wherein the grinding device is the aforementioned grinding device, and the coffee grinder is a coffee grinder or a coffee machine. The grinding component includes a moving grinding blade and a stationary grinding blade that can move relative to the moving grinding blade. The stationary grinding blade is connected to the adjusting ring and can be driven by the adjusting ring to move relative to the moving grinding blade, thereby changing the grinding gap between the stationary grinding blade and the moving grinding blade.

[0036] Compared with the prior art, the advantages of this utility model are: the bean grinding device can complete the opening and closing of the bean drop opening and the grinding gap adjustment through a single action of rotating the bean hopper, simplifying user operation. At the same time, by utilizing the cooperation of the locking component and the unlocking actuator, the opening action of the bean drop opening and the grinding gap adjustment can be carried out sequentially with the rotation of the bean hopper, preventing accidental changes in the grinding gap due to misoperation, ensuring the reliability and operational continuity of the locking and unlocking actions during the adjustment process, and improving safety. Attached Figure Description

[0037] Figure 1 This is a three-dimensional structural diagram of a coffee grinder according to an embodiment of the present utility model; only the top cover of the machine casing is shown.

[0038] Figure 2 This is a three-dimensional structural diagram of the coffee grinder in an embodiment of the present invention, showing the coffee hopper and the machine body in a separated state.

[0039] Figure 3 This is a three-dimensional structural diagram of the coffee grinder body after omitting the bean hopper, according to an embodiment of the present utility model.

[0040] Figure 4 This is a three-dimensional structural diagram of the coffee grinder body from another angle after omitting the bean hopper, according to an embodiment of the present utility model.

[0041] Figure 5 This is an exploded view of the coffee grinder according to an embodiment of the present invention;

[0042] Figure 6 This is a vertically sectional perspective view of the coffee grinder according to an embodiment of the present invention.

[0043] Figure 7 This is a three-dimensional structural diagram of the bean hopper according to an embodiment of the present utility model;

[0044] Figure 8 This is a three-dimensional structural diagram of the bean hopper in an embodiment of the present utility model, with the bean sealing plate in a closed bean dropper state.

[0045] Figure 9 This is a three-dimensional structural diagram of the bean hopper in an embodiment of the present utility model, with the bean sealing plate in the open bean dropper state.

[0046] Figure 10 This is a top view of the rotating ring according to an embodiment of the present utility model, showing a mounting base equipped with a bean hopper, with the mounting base in its initial position.

[0047] Figure 11 This is a top view of the rotating ring according to an embodiment of the present utility model, with a mounting base equipped with a bean hopper, and the mounting base is in the unlocked position;

[0048] Figure 12 This is a three-dimensional structural diagram of the rotating ring according to an embodiment of the present utility model, showing a mounting base equipped with a bean hopper, with the mounting base in the unlocked position.

[0049] Figure 13 This is a schematic diagram of the rotating ring in the present invention rotating at a certain angle, in conjunction with the fixed ring;

[0050] Figure 14 This is a three-dimensional structural diagram of the rotating ring and the fixed ring in a separated state according to an embodiment of the present utility model;

[0051] Figure 15 This is an exploded view of the second locking component according to an embodiment of the present utility model;

[0052] Figure 16 This is a three-dimensional structural diagram of the fixing ring and the upper cover after they are fitted together according to an embodiment of the present utility model, showing the locking component and the latching component. Detailed Implementation

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0054] In the specification and claims of this utility model, terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," are used to describe various exemplary structural parts and elements of this utility model. However, the use of these terms is merely for the purpose of explanation and is based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this utility model can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be regarded as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0055] Figures 1-16 This illustration shows a preferred embodiment of the coffee grinding device and coffee grinder of this invention. This embodiment uses a coffee grinder as an example to describe the structure and operation of the grinding device. It is understood that the grinding device of this embodiment is also applicable to coffee machines, especially automatic coffee machines with a coffee grinding function.

[0056] See Figures 1-9 The bean grinding device of this embodiment includes a bean hopper 11, an adjustment component, and a grinding device 81. The lower part of the bean hopper 11 has a mounting section, and a bean drop opening 122 is opened at the bottom of the mounting section. Two sets of symmetrically arranged bean sealing plate assemblies are installed at the bean drop opening 122. Each set of bean sealing plate assemblies includes a bean sealing plate 15 and a first elastic member 16. The two bean sealing plates 15 are kept close to each other under the elastic force of the first elastic member 16 to close the bean drop opening 122. The first elastic member 16 is specifically a tension spring, with one end of the tension spring hanging on the bean sealing plate 15 and the other end hanging on the hanging post of the mounting section. A first limiting protrusion 131, a second limiting protrusion 132, and a third limiting protrusion 133 are also sequentially arranged along the circumferential direction on the outer peripheral wall of the mounting section of the bean hopper 11. The width dimensions of the first limiting protrusion 131, the second limiting protrusion 132, and the third limiting protrusion 133 are different, and they are unevenly distributed in the circumferential direction to avoid misinstallation.

[0057] See Figure 6 The bean hopper 11 includes a main body and a mounting base 121 installed at the bottom of the main body. The mounting base 121 is the aforementioned mounting part. The mounting base 121 is generally cylindrical with an open top, and the bottom of the bean hopper main body is inserted into the mounting base 121. A first limiting protrusion 131, a second limiting protrusion 132, and a third limiting protrusion 133 are correspondingly provided on the outer peripheral wall of the mounting base 121. The bottom wall of the mounting base 121 has the aforementioned bean drop opening 122. The bottom of the bean hopper main body has a constricted opening for the coffee machine to drop down, which is vertically opposite to the bean drop opening 122. Two bean sealing plates 15 are provided on the inner bottom wall of the mounting base 121, specifically located between the periphery of the constricted opening and the periphery of the bean drop opening 122.

[0058] See Figure 5The adjustment assembly includes a fixed ring 21, a rotating ring 41, and an adjusting ring 71. The fixed ring 21 is bolted to the body of the grinder. The body includes a housing 90, which includes a top cover 91 with mounting holes. The fixed ring 21 is fixed in the mounting holes of the top cover 91 and protrudes above the top edge of the top cover 91. The rotating ring 41 is coaxially arranged with the fixed ring 21 and is located below the fixed ring 21. The rotating ring 41 has a mounting hole 410 inside for the bean hopper 11 to be inserted. The rotating ring 41 has a radially inwardly protruding stepped portion 45 for supporting the mounting base 121 of the bean hopper 11. The rotating ring 41 corresponds to the first ring wall 44 located above the step portion 45. The top of the first ring wall 44 has a recessed first arc-shaped notch 441, a second arc-shaped notch 442, and a third arc-shaped notch 443. The first arc-shaped notch 441, the second arc-shaped notch 442, and the third arc-shaped notch 443 are three arc-shaped notches arranged sequentially along the circumference, and correspond to the first limiting protrusion 131, the second limiting protrusion 132, and the third limiting protrusion 133 of the mounting base 121 of the bean hopper 11, respectively. The first arc-shaped notch 441, the second arc-shaped notch 442, and the third arc-shaped notch 443 penetrate the first ring wall 44 in the inward and outward directions. The lower ring wall of the fixing ring 21 is the second ring wall, and the outer diameter of the second ring wall is smaller than the outer diameter of the upper part of the fixing ring 21. The second ring wall of the fixing ring 21 is fitted outside the first ring wall 44 of the rotating ring 41. The inner circumferential wall of the fixing ring 21 also has an annular flange 24 that protrudes radially inward. The bottom surface of the annular protrusion 24 of the fixed ring 21 fits onto the top surface of the first annular wall 44 of the rotating ring 41, and respectively forms a first limiting slide 421, a second limiting slide 422, and a third limiting slide 423 with the first arc-shaped notch 441, the second arc-shaped notch 442, and the third arc-shaped notch 443. The annular protrusion 24 of the fixed ring 21 also has a first mounting notch 25, a second mounting notch 26, and a third mounting notch 28 that pass vertically through it, which are adapted to the size of the three limiting sliders. The three mounting notches have different sizes, so that the corresponding first limiting protrusion 131, second limiting protrusion 132, and third limiting protrusion 133 can slide from top to bottom into the corresponding limiting slide.

[0059] In this embodiment, the three limiting protrusions of the mounting base 121 of the bean hopper 11 and the three limiting slides on the adjustment component can cooperate to realize the rotational installation and removal of the bean hopper 11.

[0060] See Figures 10-16The fixed ring 21 and the rotating ring 41 are relatively locked together by a first locking assembly. The first locking assembly includes a locking member 31 on the fixed ring 21, a first spring 32, and a locking engagement portion 33 on the outer peripheral wall of the rotating ring 41. In this embodiment, the locking engagement portion 33 is an outwardly extending protrusion, which can be formed by the thickness variation of the first ring wall 44 of the rotating ring 41. The locking member 31 is located on the outside of the first ring wall 44 of the rotating ring 41, and is specifically installed and limited by the first pressure plate 34 located below and the upper ring wall of the fixed ring 21. After the fixed ring 21 is assembled with the upper cover 91 of the housing 90, the first spring 32 abuts against the outer end of the locking member 31 and the inner wall of the upper cover 91, so that the locking member 31 always has a tendency to move inward. The inner side of the locking element 31 is provided with a limiting recess 310, and the protrusion on the rotating ring 41 can be correspondingly engaged into the limiting recess 310 of the locking element 31 to lock the fixed ring 21 and the rotating ring 41. The left and right sides of the locking element 31 are also provided with a first guide slope 311 and a second guide slope 312, which are used to guide the first limiting protrusion 131 to push the locking element 31 radially outward to avoid interference. The setting of the first guide slope 311 and the second guide slope 312 on the locking element 31 makes the inner end of the locking element 31 have a conical or wedge-shaped structure with a smaller inner end and a larger outer end.

[0061] The grinding device 81 is located below the adjusting assembly and includes a grinding chamber 82, a moving grinding blade 83, a stationary grinding blade 84, and a drive motor 86. The stationary grinding blade 84 is threadedly connected to the adjusting ring 71. When the adjusting ring 71 rotates, it can drive the stationary grinding blade 84 to move up and down to adjust the grinding gap 85 between it and the moving grinding blade 83. The moving grinding blade 83 is driven to rotate by the drive motor 86 and cooperates with the stationary grinding blade 84 to achieve crushing and grinding. The specific mechanism of the grinding device 81 and the adjustment process of the grinding gap 85 between the moving grinding blade 83 and the stationary grinding blade 84 are existing technologies and will not be described in detail here.

[0062] See Figure 3 , Figure 4 and Figure 7The top of the stepped portion 45 of the rotating ring 41 also has two upwardly extending positioning posts 46, which are symmetrically arranged. The bottom of the two bean-sealing plates 15 has corresponding positioning recesses 151 for the positioning posts 46 to be inserted into. The bottom wall of the mounting base 121 also has two arc-shaped clearance openings 14, which allow the two positioning posts 46 to pass through and move along the extension direction of the arc-shaped clearance openings 14. When the bean hopper 11 is in place in the mounting hole 410 of the grinding device 81, the upper end of the positioning post 46 passes through the arc-shaped clearance opening 14 and is inserted into the positioning recess 151 of the bean-sealing plate 15. Since the rotating ring 41 is locked by the fixing ring 21 by the first locking component, the rotating ring 41 remains stationary during the rotation installation of the bean hopper 11. The rotating ring 41 is limited by the positioning posts 46 and the positioning recesses 151, so that the bean-sealing plates 15 overcome the elastic force of the first elastic member 16 and move away from each other, opening the bean drop opening 122. In this embodiment, the positioning post 46 and the positioning recess 151 together constitute the limiting structure between the rotating ring 41 and the bean sealing plate 15. The cooperation between the positioning post 46 and the positioning recess 151 converts the rotation of the bean hopper 11 into the linear movement of the bean sealing plate 15. The arc-shaped clearance opening 14 provides movement space for the positioning post 46, ensuring smooth operation.

[0063] The first limiting protrusion 131 on the mounting part of the bean hopper 11 serves as the first unlocking part in this embodiment. Specifically, the rotational installation process of the mounting base 121 of the bean hopper 11 in the mounting channel 410 has an unlocking position that releases the lock between the fixing ring 21 and the rotating ring 41, as well as a first rotational path before the unlocking position and a second rotational path after the unlocking position.

[0064] More specifically, the rotational installation process of the bean hopper 11 within the mounting channel 410 has an initial position, an unlocked position, and an end position. The path between the initial and unlocked positions is referred to as the first rotational path, and the path between the unlocked and end positions is referred to as the second rotational path. In the second rotational path, to ensure that the bean hopper 11 rotates in both directions, thereby achieving bidirectional adjustment of the grinding gap 85, a second locking component is provided between the bean hopper 11's mounting portion and the rotating ring 41 to restrict their relative rotation. A second unlocking portion is provided on the fixed ring 21 or the main body of the grinding appliance to release the locking state of the second locking component.

[0065] The rotational installation direction of the bean hopper 11 is as follows: Figure 10 As shown in the S1 direction, the rotational exit direction of the bean hopper 11 is as follows: Figure 10 The S2 direction is shown in the diagram.

[0066] Along the rotational installation direction of the bean hopper 11, in the first rotational path, the rotating ring 41 is locked relative to the fixed ring 21 by the first locking component. Under the limitation of the rotating ring 41, the bean sealing plate 15 can move relative to the bean hopper 11 to open the bean drop opening 122. When the installation part of the bean hopper 11 is in the unlocked position, the first unlocking part acts on the first locking component to release the fixed ring 21 from locking the rotating ring 41. The bean hopper 11 and the rotating ring 41 are locked together by the second locking component, thereby allowing the rotating ring 41 to rotate together in the second rotational path driven by the installation part of the bean hopper 11 to adjust the grinding gap 85 of the grinding component, and keeping the bean sealing plate 15 in the state of opening the bean drop opening 122. Along the rotational exit direction of the bean hopper 11, in the second rotational path, the bean hopper 11 and the rotating ring 41 are locked together by the aforementioned second locking component. The mounting part of the bean hopper 11 drives the rotating ring 41 to rotate together to adjust the grinding gap 85 of the grinding component. When the mounting part of the bean hopper 11 is in the unlocked position, the second unlocking part acts on the second locking component to release the lock between the bean hopper 11 and the rotating ring 41. The fixed ring 21 and the rotating ring 41 are locked together by the first locking component, thereby allowing the bean hopper 11 to rotate relative to the rotating ring 41 in the first rotational path, so that the bean sealing plate 15 can move relative to the bean hopper 11 to close the bean drop opening 122 under the limit of the rotating ring 41.

[0067] In the first rotation path, the rotating ring 41 is locked relative to the fixed ring 21 by the first locking assembly. The two bean-sealing plates 15 are moved away from the bean-dropping opening 122 at the bottom of the open mounting base 121 by the positioning post 46 of the rotating ring 41. When the mounting part of the bean hopper 11 is in the unlocked position, the first limiting protrusion 131 cooperates with the first guide slope 311 of the locking member 31, pressing the locking member 31 of the locking assembly radially outward, causing the locking member 31 to separate from the protrusion on the rotating ring 41, thus releasing the locking of the fixed ring 21 on the rotating ring 41. In the second rotation path where the bean hopper 11 continues to rotate, the first limiting protrusion 131 of the bean hopper 11 then abuts against the end of the first limiting slide 421, driving the rotating ring 41 to rotate synchronously with the bean hopper 11. The rotating ring 41 is connected to the adjusting ring 71 (specifically, a conventional internal and external gear ring can be used). The adjusting ring 71 rotates with the rotating ring 41, driving the stationary grinding blade 84 to move and changing the grinding gap 85.

[0068] When the bean hopper 11 is in the unlocked position, the first limiting protrusion 131 is also located at the extreme position of the first limiting slide 421. The "extreme position" refers to the position where the first limiting slider is restricted by the corresponding structure of the first limiting slide 421 (generally abutting against the end of the first limiting slide 421) and cannot continue to slide along the first limit. This design can realize that after the locking between the fixed ring 21 and the rotating ring 41 is released by the first limiting slider, the rotating ring 41 can be driven to rotate immediately, ensuring the continuity between the unlocking action and the action of driving the rotating ring 41 to move.

[0069] The outer wall of the fixing ring 21 is provided with circumferentially arranged scale markings 22. The scale markings 22 cooperate with the marking arrows 17 on the bean hopper 11. When the bean hopper 11 rotates to different positions, the marking arrows 17 on the bean hopper 11 correspond to different values ​​on the scale markings 22, thus intuitively displaying the current grinding fineness. The scale markings 22 can be engraved on the outer wall of the fixing ring 21 by screen printing or laser marking, or they can be a sticker with scale markings.

[0070] In this embodiment, when the first limiting protrusion 131 moves to its limit position along the rotational installation direction of the bean hopper 11 in the first limiting slide 421, the second limiting protrusion 132 also moves to its limit position along the rotational installation direction of the bean hopper 11 in the second limiting slide 422. In a further embodiment, it can be understood that when the first limiting protrusion 131 moves to its end position along the rotational installation direction of the bean hopper 11 in the first limiting slide 421, the second limiting protrusion 132 also moves to its end position along the rotational installation direction of the bean hopper 11 in the second limiting slide 422. A second locking component is also provided on the rotating ring 41 at the end position adjacent to the installation direction of the second limiting slide 422 to restrict the movement of the second limiting protrusion 132 relative to the rotating ring 41 in the rotational withdrawal direction. The second locking component includes a stop latch 51 and a second spring 52. Specifically, the rotating ring 41 has a recessed mounting groove at the end position adjacent to the installation direction of the second limiting slide 422, and a fixing seat 54 is provided in the mounting groove. The stop latch 51 is vertically limited on the fixed base 54. The second spring 52 is also located in the fixed base 54 and presses upward against the stop latch 51, so that the stop latch 51 always has an upward tendency to move. Specifically, the stop latch 51 includes a first protruding part 511 located inside the second limiting slide 422 (which can be understood as the first protruding part 511 corresponding vertically to the second limiting slide 422) and a second protruding part 512 located outside the second limiting slide 422 (which can be understood as the second protruding part 512 being vertically offset from the second limiting slide 422). In its natural state, the first protruding part 511 and the end periphery of the second limiting slide 422 (rotational installation direction) form a stop position 4220 for accommodating the second limiting protrusion 132. When the second limiting protrusion 132 moves to the stop position 4220, the left and right side walls of the second limiting protrusion 132 in the direction of movement contact the end periphery of the first protruding part 511 and the second limiting slide 422, respectively. That is, the size of the stop position 4220 is just enough to accommodate the first protruding part 511. The first protruding part 511 of the stop lock 51 is constructed with a third guide slope 513 on the side facing the second limiting protrusion 132, and a basically vertical surface is constructed on the other side as a stop surface. During the movement of the second limiting protrusion 132 along the rotational installation direction of the second limiting slide 422, the third guide slope 513 can guide the second limiting protrusion 132 to apply downward pressure (i.e., away from the second limiting slide 422) to the first protruding buckle 511, causing the stop latch 51 to move downward against the elastic force of the second spring 52. Finally, the second limiting protrusion 132 moves past the stop latch 51 and moves to the stop position 4220. After the second limiting protrusion 132 moves to the stop position 4220, the stop latch 51 moves upward and resets to its initial position under the action of the second spring 52. The first protruding buckle 511 forms a stop on the second limiting protrusion 132 in the rotational exit direction, restricting the movement of the second limiting protrusion 132 relative to the rotating ring 41 in the rotational exit direction.

[0071] The bottom of the fixing ring 21 also has a downwardly extending limiting rib 27. When the rotating ring 41 is locked by the fixing ring 21 through the first locking assembly, the limiting rib 27 can be located above the second protruding part 512 of the stop latch 51, and always keeps the second protruding part 512 pressed down, so that the first protruding part 511 is in a downward state, ensuring that the second limiting protrusion 132 can smoothly pass over the first protruding part 511 and move to the stop position 4220. During the rotation of the rotating ring 41 relative to the fixing ring 21 in the rotation exit direction, the top of the second protruding part 512 and the bottom of the limiting rib 27 are engaged by a guide slope, so that the stop latch 51 can be driven downward by the limiting rib 27 and release the first protruding part 511 from limiting the second limiting protrusion 132 in the rotation exit direction. Specifically, when the bean hopper 11 moves back to the original unlocked position along the second rotation path (i.e., along the S2 direction), the first limiting protrusion cooperates with the second guide slope 312 of the locking member 31, and presses the locking member 31 of the locking assembly radially outward. During a short distance (which can be called the locking stroke) as it gradually moves away from the unlocked position along the first rotation path, the locking member 31 is reset under the action of the first spring 32 and locks with the protrusion on the rotating ring 41. At this point, the rotating ring 41 is locked and cannot move with the bean hopper 11. While the locking stroke is in progress, the stop lock 51 can be pressed down by the limiting protrusion 27 and move down, releasing the first protrusion 511 from the second limiting protrusion 132 in the exit direction. This allows the second limiting protrusion 132 to be released from the stop limit after the rotating ring 41 is locked, so that it can continue to move back to the initial position along the first rotation path (relative to the rotating ring 41). The linkage design of the first protruding part 511 and the second protruding part 512, combined with the pressure of the limiting protrusion 27, allows the user to release the stop lock 51 from limiting the second limiting protrusion 132 during the reverse rotation of the bean hopper 11, facilitating the disassembly and maintenance of the bean hopper 11. The cooperation between the second limiting slide 422 and the second locking component, by forming a stop position 4220, restricts the exit movement of the second limiting protrusion 132, ensuring that the bean hopper 11 will not easily detach from the rotating ring 41 and move independently in at least a part of the path in the direction of rotational exit (corresponding to the reverse movement process of the second rotation path), ensuring the synchronicity of the forward and reverse movement of the bean hopper 11 and the rotating ring 41, and enabling flexible adjustment of the grinding gap 85 by increasing or decreasing.

[0072] To provide reliable positioning feedback during the initial installation of the bean hopper 11 or when the bean hopper 11 moves back to its initial position, thus improving the user experience, a latching assembly is also provided on the fixing ring 21. The latching assembly is located at the initial end of the first limiting slide 421 in the rotational installation direction, specifically including a latching tongue 61 movably mounted on the fixing ring 21 and a third spring 62. The latching tongue 61 is located outside the first ring wall 44 of the rotating ring 41, and is installed and limited by the second pressure plate 63 (the first pressure plate and the first pressure plate can be the same plate) located below and the upper ring wall of the fixing ring 21. After the fixing ring 21 is assembled with the upper cover 91 of the housing 90, the third spring 62 abuts against the outer end of the latching tongue 61 and the inner wall of the upper cover 91, thus ensuring that the latching tongue 61 always has a tendency to move inward. The inner end of the latching tongue 61 can be provided with a wedge-shaped structure with a guide slope, thereby ensuring a smoother engagement between the latching tongue 61 and the first limiting protrusion 131, and avoiding serious jamming or stuck problems. The engagement of the latching tongue assembly with the first limiting protrusion 131 allows the bean hopper 11 to generate tactile or auditory feedback (such as a clicking sound and vibration) when rotated to the initial position, prompting the user to rotate and move into place, thus improving the user experience.

[0073] Generally, only the first limiting protrusion 131 and the second limiting protrusion 132 mentioned above are provided on the mounting part of the bean hopper 11. However, in order to ensure the reliability of the mounting limit of the bean hopper 11 and the stability of the rotation process, in addition to the first limiting protrusion 131 and the second limiting protrusion 132 mentioned above, the third limiting protrusion 133 mentioned above is also provided, and the third limiting slide 423 mentioned above is correspondingly provided on the wall of the mounting hole 410.

[0074] The working process of the coffee grinding device in this embodiment:

[0075] Installing the bean hopper 11 and opening the bean dropper 122: Align the mounting part of the bean hopper 11 with the mounting hole 410 and insert it. The first limiting protrusion 131, the second limiting protrusion 132, and the third limiting protrusion 133 slide into the first limiting slide rail 421, the second limiting slide rail 422, and the third limiting slide rail 423, respectively. The positioning pin 46 on the inner wall of the rotating ring 41 is inserted into the positioning recess 151 of the bean sealing plate 15 to limit the bean sealing plate 15. Rotate the bean hopper 11 in the rotational installation direction. The two positioning pins 46 drive the bean sealing plate 15 to overcome the force of the tension spring and move away from each other, opening the bean dropper 122. When the first limiting protrusion 131 moves along the first limiting slide 421 to the unlocked position (which can also be understood as the locked position where the bean hopper 11 and the rotating ring 41 are locked by the second locking component), it cooperates with the guide slope of the locking fastener 31 to cause the locking fastener 31 to move radially outward, releasing the locking of the fixed ring 21 to the rotating ring 41. During this process, because the rotating ring 41 The retaining ring 21 is non-rotatable, and the limiting rib 27 on the retaining ring 21 is always in the downward stop lock 51. state,The second limiting protrusion 132 can move past the stop lock 51 to the stop position 4220 of the second limiting slide 422. After the second limiting protrusion 132 moves to the stop position 4220, when the bean hopper rotates further in the rotational installation direction (the rotating ring 41 also rotates synchronously), the limiting protrusion 27 disengages from the stop lock 51, and the stop lock 51 resets. At this point, the bean hopper 11 and the rotating ring 41 are locked together by the second locking assembly. When the bean hopper 11 rotates to the unlocked position, it continues to rotate into the second rotational path. At this time, since the bean hopper 11 and the rotating ring 41 are locked together by the second locking assembly and remain relatively fixed, the bean sealing plate 15 also remains in the open bean drop opening 122 state. The first limiting protrusion 131 abuts against the end of the first limiting slide 421, and the second limiting protrusion 132 is in the stop position 4220 and also abuts against the end of the second limiting slide 422. The rotating ring 41 and the bean hopper 11 can rotate synchronously in the rotational installation direction. Of course, due to the locking effect of the second locking component, the rotating ring 41 and the bean hopper 11 can also rotate synchronously in the rotation exit direction, thereby causing the adjusting ring 71 to rotate in both directions with the rotating ring 41, driving the stationary grinding blade 84 to move and changing the grinding gap 85. The scale markings 22 on the outer wall of the fixed ring 21 cooperate with the marking arrows 17 on the bean hopper 11 to indicate the current grinding coarseness.

[0076] Disassembly of Bean Compartment 11: Along the rotational withdrawal direction of Bean Compartment 11, in the second rotational path, Bean Compartment 11 and Rotating Ring 41 are locked together by the aforementioned second locking assembly. The mounting part of Bean Compartment 11 drives Rotating Ring 41 to rotate together to adjust the grinding gap 85 of the grinding assembly. When the mounting part of Bean Compartment 11 moves to the unlocked position, the limiting protrusion 27 on the fixing ring 21 presses down on the stop lock 51, releasing the circumferential movement restriction of the stop lock 51 on the second limiting protrusion 132. At the same time, Rotating Ring 41 is locked relative to Fixing Ring 21 by the first locking assembly. Thus, in the next first rotational path, Bean Compartment 11 continues to rotate relative to Rotating Ring 41 in the rotational withdrawal direction. During this process, the sealing plate 15 resets under the action of the tension spring, closing the bean dropper 122 and sealing the coffee beans inside Bean Compartment 11. The three limiting protrusions of Bean Compartment 11 also move to their initial positions in their corresponding limiting slides. By moving Bean Compartment 11 upwards, Bean Compartment 11 can be removed.

[0077] Based on the above embodiments, other embodiments can be obtained by replacing and improving the relevant technical features. For example, the limiting rib 27 for cooperating with the stop lock 51 may not be provided on the fixing ring 21, but instead may be provided on the body of the grinder. Furthermore, the latch assembly is not limited to being arranged in the first limiting slide 421; the latch assembly may also be arranged at the initial end of the second limiting slide 422 in the rotational installation direction, similarly including a latch 61 movably provided on the fixing ring 21 and a third spring 62. The third spring 62 acts on the latch 61, causing the latch 61 to always have a tendency to move towards the second limiting slide 422. It is understood that the latch assembly may also be arranged on the third limiting slide 423, with a similar specific structure and operation process.

Claims

1. A coffee grinding device, comprising: The bean hopper (11) has a mounting part at its lower part, and a bean drop opening (122) at the bottom of the mounting part. A bean sealing plate (15) is provided at the bean drop opening (122) and can slide relative to the mounting part of the bean hopper (11). The bean sealing plate (15) can open and close the bean drop opening (122) as its position relative to the bean hopper (11) changes. Its features also include: The adjustment assembly includes a fixed ring (21), a rotating ring (41), and an adjustment ring (71). The fixed ring (21) is fixed relative to the main body of the grinding appliance. The rotating ring (41) is located below the fixed ring (21) and can rotate relative to the fixed ring (21) around its own axis. The internal space of the rotating ring (41) defines an installation channel (410) into which the mounting part of the bean hopper (11) is rotatably inserted. The adjustment ring (71) is tractively connected to the rotating ring (41) and can be driven by the rotating ring (41) to rotate around its own axis. The adjustment ring (71) is tractively connected to the grinding assembly of the grinding device (81) and the grinding gap (85) of the grinding assembly is adjusted by the adjustment ring (71). When the bean hopper (11) is positioned in the mounting hole (410) of the grinding device (81), the rotating ring (41) and the bean sealing plate (15) are limited in the rotation direction of the bean hopper (11) by a limiting structure. A first locking component for limiting the relative rotation of the two is also provided between the fixed ring (21) and the rotating ring (41). The mounting part of the bean hopper (11) also has a first unlocking part for releasing the locking state of the first locking component. During the rotational installation process of the mounting part of the bean hopper (11) in the mounting hole (410), there is an unlocking position for releasing the lock between the fixed ring (21) and the rotating ring (41) and a first unlocking position before the unlocking position. A first rotation path and a second rotation path after the unlocked position. In the first rotation path, the rotating ring (41) is locked relative to the fixed ring (21) by the first locking component. The bean sealing plate (15) can move relative to the bean bin (11) to open the bean drop opening (122) under the limitation of the rotating ring (41). When the mounting part of the bean bin (11) is in the unlocked position, the first unlocking part acts on the first locking component to release the locking of the fixed ring (21) on the rotating ring (41), thereby allowing the rotating ring (41) to rotate together with the mounting part of the bean bin (11) in the second rotation path to adjust the grinding gap (85) of the grinding component.

2. The grinding device according to claim 1, characterized in that: A second locking component for limiting the relative rotation of the two is provided between the mounting part of the bean hopper (11) and the rotating ring (41), and a second unlocking part for releasing the locking state of the second locking component is provided on the fixing ring (21) or the main body of the bean grinder. The installation part of the bean hopper (11) has an initial position, an unlocking position and an end position during the rotational installation process in the installation channel (410). The path between the initial position and the unlocking position is called the first rotational path, and the path between the unlocking position and the end position is called the second rotational path. Along the rotational installation direction of the bean hopper (11), in the first rotational path, the rotating ring (41) is locked relative to the fixed ring (21) by the first locking component. The bean sealing plate (15) can move relative to the bean hopper (11) to open the bean drop opening (122) under the limitation of the rotating ring (41). When the installation part of the bean hopper (11) is in the unlocked position, the first unlocking part acts on the first locking component to release the locking of the fixed ring (21) on the rotating ring (41). The bean hopper (11) and the rotating ring (41) are locked together by the second locking component, thereby allowing the rotating ring (41) to rotate together in the second rotational path driven by the installation part of the bean hopper (11) to adjust the grinding gap (85) of the grinding component, and keeping the bean sealing plate (15) in the open bean drop opening (122). Along the rotational exit direction of the bean hopper (11), in the second rotational path, the bean hopper (11) and the rotating ring (41) are locked together by the second locking component. The mounting part of the bean hopper (11) drives the rotating ring (41) to rotate together to adjust the grinding gap (85) of the grinding component. When the mounting part of the bean hopper (11) is in the unlocked position, the second unlocking part acts on the second locking component to release the lock between the bean hopper (11) and the rotating ring (41). The fixing ring (21) and the rotating ring (41) are locked together by the first locking component, thereby allowing the bean hopper (11) to rotate relative to the rotating ring (41) in the first rotational path, so that the bean sealing plate (15) can move relative to the bean hopper (11) to close the bean drop opening (122) under the limit of the rotating ring (41).

3. The grinding device according to claim 2, characterized in that: The inner peripheral wall of the mounting hole (410) is provided with a first limiting slide (421) extending in the circumferential direction. The outer peripheral wall of the mounting part of the bean hopper (11) has a first limiting protrusion (131) protruding outward. The first limiting protrusion (131) can be inserted into the first limiting slide (421) and move along the first limiting slide (421) as the bean hopper (11) rotates. When the first limiting protrusion (131) moves to its limit position along the rotational installation direction of the bean hopper (11) in the first limiting slide (421), the first limiting protrusion (131) acts on the first locking component to release the locking of the fixed ring (21) on the rotating ring (41). The first limiting protrusion (131) constitutes the first unlocking part. In the second rotation path, the first limiting protrusion (131) abuts against the end periphery of the first limiting slide (421) and drives the rotating ring (41) to rotate together, thereby adjusting the grinding gap (85) of the grinding component.

4. The grinding device according to claim 3, characterized in that: The first limiting slide (421) extends from the inner wall of the rotating ring (41) to the outer wall. The first locking assembly includes a locking member (31), a first spring (32), and a locking engagement portion (33) disposed on the rotating ring (41). The locking member (31) is movably disposed on the fixed ring (21) and arranged on the outside of the first limiting slide (421). The locking engagement portion (33) is disposed on the outer wall of the rotating ring (41) and adjacent to the end of the first limiting slide (421). Under the action of the first spring (32), the locking member (31) always has the tendency to move toward the inside of the rotating ring (41) and lock with the locking engagement portion (33). The locking member (31) defines a limiting notch (310) on one side of the rotating ring (41). The locking engagement portion (33) is a protrusion that protrudes outward from the outside of the rotating ring (41).

5. The grinding device according to claim 4, characterized in that: The locking member (31) has a first guide slope (311) and a second guide slope (312) respectively defined on the left and right sides of the limiting notch (310) on one side facing the rotating ring (41). The first guide slope (311) and the second guide slope (312) are configured such that when the first limiting protrusion (131) moves back and forth along the first limiting slide (421), the corresponding first guide slope (311) and the second guide slope guide the first limiting protrusion (131) to apply radial outward pressure to the locking member (31).

6. The grinding device according to claim 5, characterized in that: The inner peripheral wall of the mounting hole (410) is provided with a second limiting slide (422) extending circumferentially. The outer peripheral wall of the mounting part of the bean hopper (11) has a second limiting protrusion (132) protruding outward. The second limiting protrusion (132) can be inserted into the second limiting slide (422) and moves along the second limiting slide (422) as the bean hopper (11) rotates. When the first limiting protrusion (131) moves to the limit position in the first limiting slide (421) along the rotational mounting direction of the bean hopper (11), the second limiting protrusion (132) also moves to the limit position in the second limiting slide (422) along the rotational mounting direction of the bean hopper (11). The second locking component is disposed on the rotating ring (41) and is used to restrict the second limiting protrusion (132) from moving relative to the rotating ring (41) in the withdrawal direction. The second locking component includes a stop latch (51) and a second spring (52). The stop latch (51) is movably disposed on the rotating ring (41) at the end position adjacent to the installation direction of the second limiting slide (422), and forms a stop position (4220) for accommodating the second limiting protrusion (132) with the periphery of the end of the second limiting slide (422). Under the action of the second spring (52), the stop latch (51) always has the tendency to move toward the second limiting slide (422) to form a stop on the second limiting protrusion (132) located at the stop position (4220).

7. The grinding device according to claim 6, characterized in that: A fixed seat (54) is provided at the end of the rotating ring (41) near the installation direction of the second limiting slide (422). The stop lock (51) is movably limited on the fixed seat (54). The stop lock (51) includes a first protruding part (511) located inside the second limiting slide (422) and a second protruding part (512) located outside the second limiting slide (422). The bottom of the fixed ring (21) also has a downwardly extending limiting rib (27). The top of the second protruding part (512) and the bottom of the limiting rib (27) are engaged by a guide inclined surface, so that the stop lock (51) can be driven to move downward by the limiting rib (27) and release the first protruding part (511) from limiting the second limiting protrusion (132) in the rotation exit direction.

8. The grinding device according to claim 6, characterized in that: The rotating ring (41) has an upwardly extending first ring wall (44), the top of which has a downwardly recessed and circumferentially extending first arc-shaped notch (441) and second arc-shaped notch (442). The inner wall of the fixing ring (21) has an annular protrusion (24) extending radially inward. When the fixing ring (21) and the rotating ring (41) are assembled in place, the wall of the fixing ring (21) corresponding to the wall below the annular protrusion (24) is sleeved on the periphery of the first ring wall (44), and the annular protrusion (24) abuts against the first ring. The top of the wall (44) and together with the first arc-shaped notch (441) define the first limiting slide (421), and together with the second arc-shaped notch (442) define the second limiting slide (422). The annular convex edge (24) is also provided with a first mounting notch (25) that is vertically through to allow the first limiting protrusion (131) to enter the first limiting slide (421) and a second mounting notch (26) that is vertically through to allow the second limiting protrusion (132) to enter the second limiting slide (422).

9. The grinding device according to claim 6, characterized in that: It also includes a latch assembly disposed on the fixing ring (21); The latch assembly is arranged at the initial end of the first limiting slide (421) in the rotational installation direction, and includes a latch (61) movably disposed on the fixing ring (21) and a third spring (62). The third spring (62) acts on the latch (61) and causes the latch (61) to always have a tendency to move toward the first limiting slide (421); or, The latch assembly is arranged at the initial end of the second limiting slide (422) in the rotational installation direction, and includes a latch (61) movably disposed on the fixing ring (21) and a third spring (62). The third spring (62) acts on the latch (61) and causes the latch (61) to always have a tendency to move toward the second limiting slide (422).

10. The coffee grinding apparatus according to any one of claims 1 to 9, characterized in that: The bean hopper (11) includes a main body (12) with an open bottom and a mounting base (121) located at the bottom of the main body (12). The mounting base (121) constitutes the mounting part of the bean hopper (11). The bean sealing plate (15) is located between the mounting base (121) and the main body (12). The inner peripheral wall of the rotating ring (41) forms an inwardly extending step (45) and a positioning post (46) extending upward from the top of the step (45). The bean sealing plate (15) has a positioning recess (151) for the positioning post (46) to be inserted into. With the grinding device (81) in place in the mounting hole (410), the positioning post (46) is inserted into the positioning recess (151). As the bean hopper (11) rotates, the positioning post (46) and the positioning recess (151) cooperate to limit the bean sealing plate (15) to open the bean drop opening (122). The positioning post (46) and the positioning recess (151) together form the limiting structure between the rotating ring (41) and the bean sealing plate (15). The bottom wall of the mounting base (121) is also provided with an arc-shaped clearance opening (14) for the positioning post (46) to rotate and move.

11. The coffee grinding device according to claim 10, characterized in that... The mounting base (121) is provided with two sets of bean sealing plate assemblies arranged symmetrically. Each set of bean sealing plate assemblies includes the bean sealing plate (15) and a first elastic member (16). The two bean sealing plates (15) can move away from each other to open the bean drop opening (122) and can move closer to each other to close the bean drop opening (122). The two first elastic members (16) act on the bean sealing plates (15) so that the two bean sealing plates (15) tend to move closer to each other.

12. The coffee grinding apparatus according to any one of claims 1 to 9, characterized in that: The outer peripheral wall of the fixed ring (21) has a scale mark (22) arranged circumferentially. The outer wall of the bean hopper (11) is also provided with an indicator arrow (17) that matches the scale mark (22) in the area above the scale mark (22). When the bean hopper (11) is rotated to different positions, the indicator arrow (17) indicates different positions on the scale mark (22) to show the grinding gap (85) of the current state of the grinding assembly.

13. A coffee grinder, comprising a body and a grinding device disposed on the body, characterized in that: The grinding device is the same as any one of claims 1 to 12. The grinding appliance is a coffee grinder or a coffee machine. The grinding assembly includes a moving grinding blade (83) and a stationary grinding blade (84) that can move relative to the moving grinding blade (83). The stationary grinding blade (84) is connected to the adjusting ring (71) and can be moved relative to the moving grinding blade (83) by the adjusting ring (71), thereby changing the grinding gap (85) between the stationary grinding blade (84) and the moving grinding blade (83).

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