A coffee maker, coffee powder weighing device

Abstract

The utility model discloses a coffee machine, coffee powder weighing device, apply to coffee machine technical field, include: hopper (1), the hopper (1) includes the powder cavity of containing coffee powder, the outer periphery of hopper (1) is equipped with the connecting ear (11), weighing assembly (2) includes electronic scale (22) and installs scale pan frame (21) of electronic scale (22), scale pan frame (21) is distributed with at least two groups of support platform (211) and the pressure joint of peripheral direction, support platform (211) is located below pressure joint (3), when hopper (1) with weighing assembly (2) are connected, the lower surface of connecting ear (11) is supported in support platform (211), and the pressure joint (3) is pressed in the upper surface of connecting ear (11). Can be directly, accurate weighing of coffee powder in hopper (1) in coffee machine inside before pressing powder.

Description

Technical Field

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

[0002] To ensure the quality of coffee extraction, the weight of coffee grounds needs to be precisely controlled. However, in existing technologies, users must first grind the coffee grounds and then move the funnel to a separate electronic scale for weighing. If the weight is insufficient, the grinding and weighing cycle must be repeated, which is time-consuming and prone to spilling coffee grounds. Alternatively, although some models have built-in weighing components, the electronic scale is usually located near the bean hopper or grinding disc, only monitoring the instantaneous flow rate of coffee beans or grinding, and cannot directly obtain the actual weight of the coffee grounds in the funnel. Accumulated errors lead to inaccurate coffee grounds measurements. Therefore, how to directly and accurately weigh the coffee grounds in the funnel has become a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this invention is to provide a coffee powder weighing device that can directly and accurately weigh coffee powder in a funnel; another purpose of this invention is to provide a coffee machine that includes the above-mentioned coffee powder weighing device, which has the same beneficial effects as the coffee powder weighing device.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] A coffee powder weighing device, comprising:

[0006] A funnel, the funnel including a powder cavity for containing coffee powder, and the funnel having a connecting lug on its outer periphery;

[0007] A weighing assembly includes an electronic scale and a weighing pan frame for mounting the electronic scale; the weighing pan frame has at least two sets of support platforms and pressing parts distributed along the circumferential direction, and the support platforms are located below the pressing parts;

[0008] When the funnel is connected to the weighing assembly, the lower surface of the connecting lug is supported on the support platform, and the pressing part is pressed against the upper surface of the connecting lug.

[0009] Optionally, the crimping part includes a crimping rod and an elastic element that continuously presses the lower end of the crimping rod against the upper surface of the connecting ear. The weighing pan is provided with a cavity for mounting the crimping part. The bottom surface of the cavity is provided with a lower opening. The lower end of the crimping rod passes through the lower opening and abuts against the upper surface of the connecting ear.

[0010] Optionally, the middle section of the crimping rod is provided with a radially protruding snap-fit ​​portion, the lower end of the elastic element abuts against the snap-fit ​​portion, the bottom surface of the cavity forms a snap-fit ​​surface on the outer periphery of the lower opening, the snap-fit ​​portion and the snap-fit ​​surface have an overlapping portion and abut against the snap-fit ​​surface.

[0011] Optionally, the top surface of the cavity is provided with an upper opening, the cross-section of which completely covers the cross-section of the snap-fit ​​portion, and the crimping rod is inserted into the cavity through the upper opening;

[0012] The upper opening is covered by a pressure plate, and the pressure plate is provided with a guide hole for the crimping rod to extend out.

[0013] Optionally, the upper surface of the connecting ear is provided with a groove that matches the crimping rod, and the crimping rod is inserted into the groove during crimping.

[0014] Optionally, it also includes:

[0015] A pressure sensor is disposed at the connection between the connecting lug and the crimping part to monitor the pressure value applied to the funnel by the crimping part;

[0016] An installation detection mechanism is connected in communication with each of the pressure sensors to determine that the funnel has been correctly installed when the pressure values ​​fed back by all the pressure sensors fall within a set threshold range.

[0017] Optionally, the pressure sensor is embedded in the bottom surface of the groove; the installation detection mechanism has a built-in flatness detection unit, which is used to determine that the funnel has been placed horizontally when the pressure values ​​fed back by all the pressure sensors are consistent.

[0018] Optionally, the weighing pan frame includes a lower assembly ring, an upper assembly ring, and a support frame located above the upper assembly ring. One end of the electronic scale is connected to the support frame, and the other end is connected to the side wall of the upper assembly ring through a connecting frame. The support platform and the pressing part are located on the lower assembly ring.

[0019] Optionally, the lower assembly ring is provided with three sets of support platforms spaced circumferentially, the support platforms extending downward from the bottom surface of the lower assembly ring.

[0020] This utility model provides a coffee machine, including the coffee powder weighing device described in any of the above-mentioned claims.

[0021] The beneficial effects of this utility model are as follows: the coffee powder weighing device provided by this utility model has a connecting ear designed on the outer periphery of the funnel, forming a mechanical interface for docking with the weighing component. The weighing component consists of an electronic scale and a weighing pan. The weighing pan is equipped with at least two sets of support platforms and a pressing part. The support platforms are located below the pressing parts, and a clamping gap is reserved between them for the insertion of the connecting ear. The support platforms directly support the connecting ear, achieving vertical force bearing and transferring the powder weight to the electronic scale without attenuation. The pressing part presses against the upper surface of the connecting ear, achieving reverse limiting and preventing the funnel from falling off. The funnel can be locked or unlocked by gently lifting the pressing part or gently rotating the funnel, allowing for one-step assembly and disassembly without tools, resulting in high assembly and disassembly efficiency.

[0022] The aforementioned coffee powder weighing device uses a clamping connection between the pressing part and the support platform to lock the funnel, eliminating the gaps and elastic deformation inherent in traditional threads or snap-fits. This allows the electronic scale to accurately capture the weight of the coffee powder, resulting in minimal weighing error. Multiple support platforms and pressing parts are evenly distributed circumferentially, ensuring uniform load distribution, preventing funnel wobbling or eccentricity, and guaranteeing weighing accuracy.

[0023] This utility model also provides a coffee machine, including any of the above-mentioned coffee powder weighing devices. Since the above-mentioned coffee powder weighing devices have the aforementioned technical effects, the coffee machine with such a device should also have the corresponding technical effects. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 A schematic diagram of a coffee powder weighing device provided in a specific embodiment of this utility model;

[0026] Figure 2 Another perspective diagram of a coffee powder weighing device;

[0027] Figure 3 A cross-sectional schematic diagram of a coffee powder weighing device;

[0028] Figure 4 This is a schematic diagram showing the connection between the funnel and the pressing part;

[0029] Figure 5 This is a schematic diagram of the funnel structure;

[0030] Figure 6 This is a schematic diagram of the crimping part;

[0031] Figure 7 A schematic diagram illustrating the application of the coffee powder weighing device provided in a specific embodiment of this utility model to a coffee machine;

[0032] Figure 8 for Figure 7 Schematic diagram of the weighing component;

[0033] Figure 9 A schematic diagram illustrating the application of the coffee powder weighing device provided in one specific embodiment of this utility model to another coffee machine;

[0034] Figure 10 for Figure 9 A schematic diagram of the weighing component.

[0035] Figure label:

[0036] 1-Function funnel; 11-Connecting ear; 111-Groove; 2-Weighing component; 21-Weighing pan frame; 211-Support platform; 212-Cavity; 213-Lower assembly ring; 214-Upper assembly ring; 215-Support frame; 22-Electronic scale; 3-Crimping part; 31-Crimping rod; 32-Elastic element; 33-Pressure plate; 4-Connecting frame. Detailed Implementation

[0037] The core of this utility model is to provide a coffee powder weighing device that can directly and accurately weigh the coffee powder in the funnel; another core of this utility model is to provide a coffee machine that includes the above-mentioned coffee powder weighing device, which has the same beneficial effects as the coffee powder weighing device.

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] In one specific embodiment, please refer to Figures 1 to 10 The coffee powder weighing device provided by this utility model includes a funnel 1 and a weighing component 2. The funnel 1 includes a powder cavity for containing coffee powder, and a connecting ear 11 is provided on the outer periphery of the funnel 1. The weighing component 2 includes an electronic scale 22 and a weighing pan frame 21 for mounting the electronic scale 22. The weighing pan frame 21 has at least two sets of support platforms 211 and pressing parts 3 distributed along the circumferential direction, with the support platforms 211 located below the pressing parts 3. When the funnel 1 is connected to the weighing component 2, the lower surface of the connecting ear 11 is supported on the support platform 211, and the pressing part 3 is pressed against the upper surface of the connecting ear 11.

[0040] In the above structure, the funnel 1 includes a shell that circumferentially encloses a powder cavity with an open top, through which coffee powder enters the powder cavity. Connecting ears 11 are located on the outside of the shell; specifically, multiple connecting ears 11 are spaced apart circumferentially along the outside of the shell for connecting to the weighing component 2, forming a mechanical interface for docking with the weighing component 2. Preferably, the connecting ears 11 are integrally formed with the funnel 1, and the upper and lower surfaces of the connecting ears 11 are precision machined to ensure accurate and reliable force transmission during weighing.

[0041] The weighing assembly 2 consists of an electronic scale 22 and a weighing pan frame 21. The weighing pan frame 21 has at least two sets of support platforms 211 and pressing parts 3 arranged circumferentially. That is, support platforms 211 and pressing parts 3 are spaced apart along the circumference of the weighing pan frame 21, and the support platforms 211 and pressing parts 3 are roughly aligned or partially staggered in the circumferential direction, with only an overlapping portion to clamp the connecting ear 11. The support platform 211 is located below the pressing part 3, with a clamping gap reserved between them for the insertion of the connecting ear 11. The support platform 211 directly supports the connecting ear 11, achieving vertical force bearing and transferring the powder weight to the electronic scale 22 without attenuation. The pressing part 3 presses against the upper surface of the connecting ear 11, achieving reverse limiting and preventing the funnel 1 from falling off. Specifically, the pressing part 3 can adopt an elastic cantilever or a quick-release clamping plate, pre-tightening the connecting ear 11 downwards and automatically rebounding, eliminating gaps quickly and reliably locking the connecting ear 11.

[0042] The weight of the coffee powder added to the funnel 1 is transmitted to the weighing pan 21 via the connecting lug 11. The electronic scale 22, mounted on the weighing pan 21, senses this pressure and weighs the coffee powder added to the funnel 1. Preferably, the electronic scale 22 can use a three-point high-precision sensor; it can also have real-time tare and overload protection. When overloaded, the funnel 1 first touches the mechanical hard limit, and the electronic scale 22 is fully protected.

[0043] It is important to understand that the weighing process using the aforementioned coffee powder weighing device includes the following steps:

[0044] The connecting lug 11 of funnel 1 is placed between support platform 211 and pressing part 3, forming a clamp-lock structure that securely locks funnel 1. Coffee powder is poured into the powder chamber, and electronic scale 22 captures the weight change in real time. During this process, the system can also monitor synchronously, stopping powder addition when the set weight is reached. Alternatively, when funnel 1 is connected to weighing component 2, its powder chamber already contains coffee powder. When funnel 1 is locked by support platform 211 and pressing part 3, electronic scale 22 can weigh the amount of coffee powder in funnel 1.

[0045] When the weighing is complete and the funnel 1 needs to be disassembled, simply rotate the funnel 1 slightly in the opposite direction and the connecting lug 11 will be removed from the clamping area and detached from the weighing component 2.

[0046] Throughout the process, the support platform 211 and the pressing part 3 clamp the connecting ear 11 tightly, constraining it circumferentially in the horizontal direction and clamping it bidirectionally in the vertical direction. The entire weight of the funnel 1 and the coffee powder is transferred to the electronic scale 22 with zero loss, ensuring accurate and stable readings.

[0047] With the aforementioned coffee powder weighing device, the pressing part 3 and the support platform 211 are clamped together by the connecting ears 11, ensuring a reliable lock on the funnel 1. This allows for direct weighing of the coffee powder within the funnel 1, avoiding deviations caused by accumulated errors from indirect weighing. Furthermore, the weighing device in this embodiment eliminates gaps and elastic deformation associated with traditional threads or snap-fits, enabling the electronic scale 22 to fully capture the weight of the coffee powder with minimal weighing error. Multiple sets of support platforms 211 and pressing parts 3 ensure even load distribution, preventing the funnel 1 from wobbling or becoming eccentric, thus guaranteeing weighing accuracy. The funnel 1 can be locked or unlocked simply by lifting the pressing part 3 or gently rotating it; this one-step assembly / disassembly process requires no tools and offers high efficiency.

[0048] In some embodiments, the crimping part 3 includes a crimping rod 31, which is a rigid rod with its upper end placed in the internal cavity 212 of the weighing pan frame 21 and its lower end passing through the lower opening on the bottom surface of the cavity 212 and directly abutting against the upper surface of the connecting ear 11.

[0049] The crimping part 3 also includes an elastic element 32 that continuously presses the lower end of the crimping rod 31 against the upper surface of the connecting ear 11. The elastic element 32 can be a compression spring, a spring sheet, or an elastic body. The elastic element 32 is sleeved or abutted between the upper end of the crimping rod 31 and the top of the cavity 212, and always applies a downward elastic preload to the crimping rod 31 to eliminate the fit gap and improve the weighing accuracy.

[0050] The weighing pan frame 21 is provided with a cavity 212 for mounting the crimping part 3. The bottom surface of the cavity 212 has a lower opening, through which the lower end of the crimping rod 31 protrudes and abuts against the upper surface of the connecting ear 11. The cavity 212 not only provides guidance and protection for the crimping rod 31, but also limits its maximum stroke to prevent excessive compression or swaying. Furthermore, the cavity 212 structure allows the crimping rod 31 and the elastic element 32 to be hidden inside the cavity 212, preventing dust and powder and extending service life.

[0051] It should be noted that when weighing coffee powder, the funnel 1 is pushed between the support platform 211 and the pressing rod 31. The connecting lug 11 then pushes up the pressing rod 31, compressing the elastic element 32 and storing energy. Under the elastic force of the elastic element 32, it forms a self-locking clamp with the connecting lug 11, firmly pressing the pressing rod 31 onto the connecting lug 11, thus locking it in place. During continuous weighing, the elastic element 32 always pushes the pressing rod 31 downwards with its constant potential energy, maintaining a continuous and stable positive pressure at the lower end, firmly adhering to the upper surface of the connecting lug 11, eliminating the gap, and making the weighing more accurate.

[0052] When the funnel 1 needs to be removed, gently lift the crimping rod 31 or rotate the funnel 1 to overcome the elastic force of the elastic element 32. The crimping rod 31 will then disengage from the connecting ear 11, and the funnel 1 can be removed. The entire process only requires overcoming the elastic force of the elastic element 32 to move the crimping rod 31 upward and release the connecting ear 11, without the need for any tools.

[0053] Throughout the process, the pre-tightening force is set by the stiffness and compression amount of the elastic element 32, ensuring gapless pressing while avoiding excessive stress that could cause wear or deformation. By replacing the elastic element 32 with one of different stiffnesses or adjusting the pre-compression amount, it can be adapted to weighing coffee powder of different weight ranges, demonstrating strong compatibility.

[0054] In some embodiments, the crimping rod 31 has a radially protruding locking portion in its middle section, that is, the crimping rod 31 is designed with a radially varying portion. An elastic member 32 is fitted onto the crimping rod 31, with its lower end abutting against the upper end face of the locking portion, and its upper end abutting against the top of the inner wall of the cavity 212. The bottom surface of the cavity 212 forms a locking surface around the lower opening. When the crimping rod 31 is assembled in place, the locking portion and the locking surface overlap, and the lower surface of the locking portion abuts against the locking surface, forming a mechanical stop that restricts the crimping rod 31 from continuing to move downwards, thereby preventing the elastic member 32 from pushing the crimping rod 31 out of the cavity 212.

[0055] During the installation phase, the crimping rod 31 is inserted from above or to the side of the cavity 212, the lower surface of the snap-fit ​​part abuts against the snap-fit ​​surface, and the elastic element 32 is located between the snap-fit ​​part and the top of the inner wall of the cavity 212, thus completing the axial positioning.

[0056] During the weighing stage, the connecting ear 11 of the funnel 1 enters the clamping gap, lifts the pressing rod 31, the elastic element 32 continues to compress, the snap-fit ​​part rises accordingly, and the pressing rod 31 presses the connecting ear 11 with a constant positive pressure to form a stable clamping.

[0057] During disassembly, gently lift the crimping rod 31 or rotate the funnel 1. The snap-fit ​​part briefly moves upward away from the snap-fit ​​surface, and the elastic element 32 is compressed again. The crimping rod 31 releases the connecting ear 11. After releasing, the elastic element 32 pushes the snap-fit ​​part to automatically fall back and stop against the snap-fit ​​surface again. The mechanism is reset, and no tools are needed throughout the process.

[0058] Throughout the process, the elastic element 32 remains in a compressed state, applying a continuous and constant downward thrust to the crimping rod 31 via the locking part. The rigid overlap between the locking part and the locking surface limits the maximum extension of the crimping rod 31 and eliminates axial movement, making the stroke precisely controllable.

[0059] In some embodiments, the top surface of the cavity 212 is provided with an upper opening, the cross-section of which completely covers the cross-section of the snap-fit ​​portion, and the crimping rod 31 is inserted into the cavity 212 through the upper opening.

[0060] The upper opening is sealed with a pressure plate 33. The pressure plate 33 is provided with a guide hole for the pressure rod 31 to extend out. Specifically, the pressure plate 33 is fixed to the top surface of the cavity 212 by means of screws or buckles, etc., to close the upper opening.

[0061] It should be explained that the bottom surface of the pressure plate 33 and the top surface inside the cavity 212 together form the upper limit of the elastic element 32. When the pressing rod 31 is subjected to force to compress the elastic element 32 upward, the upper end of the elastic element 32 abuts against the bottom surface of the pressure plate 33, preventing the elastic element 32 from coming out of the cavity 212.

[0062] During assembly, first, fit the elastic element 32 onto the crimping rod 31, then insert the crimping rod 31 into the upper opening from above. After the locking part enters the cavity 212 through the upper opening, the lower end of the elastic element 32 abuts against the locking part, and the upper end abuts against the top surface of the cavity 212. Then, cover it with the pressure plate 33, and the crimping rod 31 protrudes through the guide hole. The pressure plate 33 is then locked to complete the installation. The crimping rod 31 and the elastic element 32 can be removed together by removing the pressure plate 33. No special tools are required, making maintenance convenient.

[0063] The guide hole of the pressure plate 33 and the pressing rod 31 form a sliding pair. The pressing rod 31 slides up and down in the guide hole. The locking part moves between the bottom surface of the pressure plate 33 and the locking surface of the cavity 212, restricting the pressing rod 31 to move up and down along the axial direction to prevent swaying.

[0064] Preferably, the snap-fit ​​part has a small gap in the inner wall of the cavity 212, and the guide hole and the cavity 212 provide double restraint for the crimping rod 31, ensuring the straightness of the movement of the crimping rod 31 and avoiding lateral wear.

[0065] In some embodiments, the upper surface of the connecting ear 11 is provided with a groove 111 that matches the crimping rod 31, and the crimping rod 31 is inserted into the groove 111 during crimping.

[0066] Specifically, a groove 111 that matches the shape of the lower end of the crimping rod 31 is machined or stamped on the upper surface of the connecting ear 11. The center line of the groove 111 is coaxial with the axis of the crimping rod 31 to ensure that there is no lateral misalignment after assembly. Preferably, the cross-section of the groove 111 is usually V-shaped, U-shaped or arc-shaped, and the depth is slightly greater than the protrusion height of the head of the crimping rod 31.

[0067] During connection, the connecting ear 11 is pushed between the support platform 211 and the crimping part 3. The crimping rod 31 rebounds quickly under the action of the elastic element 32, and its lower end slides into the bottom of the groove, emitting a click sound, completing the self-positioning and locking. During the weighing stage, the crimping rod 31 is always embedded in the groove 111, and the groove 111 and the rod head fit together with zero gap. The funnel 1 cannot produce relative displacement regardless of lateral disturbances or high-frequency vibrations, and the electronic scale 22 can continuously receive stable and lossless weight signals.

[0068] By engaging the crimping rod 31 with the groove 111, the traditional surface crimping is upgraded to pin-groove positioning. The sidewall of the groove 111 restricts the horizontal displacement of the crimping rod 31, eliminating the swaying and eccentricity of the funnel 1 during weighing. The bottom surface of the groove 111 becomes the termination surface of the crimping rod 31, allowing the preload of the elastic element 32 to be transmitted vertically along the rod axis, avoiding the loss of component force. A slight interference or toothed engagement is formed between the groove 111 and the rod head, preventing the funnel 1 from rotating accidentally and improving the repeatability of positioning accuracy.

[0069] Furthermore, the groove 111 has an inlet ramp on its outer periphery, which reduces the lifting force and allows the crimping rod 31 to slide in and out smoothly within a small deviation range, making the operation easier.

[0070] In some embodiments, it also includes:

[0071] A pressure sensor is provided at the connection between the connecting lug 11 and the crimping part 3 to monitor the pressure value applied to the funnel 1 by the crimping part 3;

[0072] The installation detection mechanism is connected to each pressure sensor to determine that funnel 1 has been correctly installed when the pressure values ​​fed back by all pressure sensors fall within the set threshold range.

[0073] In practical applications, pressure sensors can be embedded in the bottom of the groove 111 on the upper surface of the connecting ear 11, or placed on the lower end face of the crimping rod 31, forming a direct detection point between the connecting ear 11 and the crimping rod 31. When the funnel 1 is pushed into the weighing pan frame 21, the crimping rod 31 is embedded in the groove 111 and applies downward pressure. The pressure sensors output analog or digital quantities of the crimping force in real time, and each pressure sensor outputs an instantaneous pressure value. All pressure sensors communicate with the installation and testing mechanism in real time via flexible wires or wireless modules. The installation and testing mechanism compares this value with a set threshold range. The lower limit of the range corresponds to contact but insufficient pre-tightening, and the upper limit corresponds to overpressure or obstruction by foreign objects. The installation and testing mechanism preferably has built-in status indicator lights to intuitively inform the user of the installation status and improve the operating experience. For example, when any value is below the lower limit, the indicator light flashes red, indicating that it is not pressed tightly; when any value is above the upper limit, the indicator light flashes yellow, indicating overpressure / powder jamming; only when the pressure values ​​of all values ​​fall into the set threshold range simultaneously, the indicator light remains green, and the system determines that the funnel 1 has been correctly installed. Multi-point pressure closed-loop confirmation avoids installation errors caused by relying solely on feel or sound.

[0074] Preferably, the installation detection mechanism is linked with the coffee machine's main control unit. When it is determined that the funnel 1 has been correctly installed, a signal is sent to the coffee machine allowing the addition of coffee powder to the funnel 1.

[0075] In some embodiments, during the weighing stage, the pressure sensor can continuously monitor the pressing force. If the pressure at a certain point suddenly drops below the lower limit, it is determined that the funnel 1 has been accidentally lifted, and the system immediately interrupts the feeding to avoid powder weight error or equipment damage.

[0076] In some embodiments, during the disassembly phase, the lifting rod or rotating bucket causes a sudden reduction in the pressing force, the pressure sensor value falls below the lower limit, the installation detection mechanism records that it is not installed, and the indicator light goes out; after the elastic element 32 is reset, the system enters standby mode, waiting for the next installation determination.

[0077] In some embodiments, the pressure sensor is embedded in the bottom surface of the groove 111; the installation detection mechanism has a built-in flatness detection unit, which is used to determine that the funnel 1 has been placed horizontally when the pressure values ​​fed back by all pressure sensors are consistent.

[0078] In practical applications, a thin-film pressure sensor is embedded in the bottom surface of the groove 111 on the upper surface of each connecting lug 11. The pressure sensor is relatively thin, and its surface can be coated with a hard, wear-resistant film. This does not affect the original fit between the crimping rod 31 and the groove 111, and it can directly sense the end face pressure of the crimping rod 31. After the user pushes the funnel 1 in, the crimping rod 31 first falls into the groove 111 and presses the pressure sensor. The pressure sensor collects the pressure at each point and transmits it to the installation detection mechanism. In addition to the threshold judgment function, the installation detection mechanism also has a flatness detection unit, which determines whether the funnel 1 is placed horizontally by performing consistency calculations on the pressure values ​​at multiple points.

[0079] When funnel 1 is placed perfectly horizontally, the theoretical pressure between each connecting lug 11 and the corresponding pressing rod 31 is equal. If there is a tilt, the force on the lower lug increases, and the force on the higher lug decreases; the difference is monotonically related to the tilt angle. The leveling detection unit compares the pressure values ​​of all pressure sensors in real time: if the difference is ≤ the set tolerance, it is determined to be level; if the difference is > the set tolerance, a tilt alarm is triggered and an adjustment prompt is given. Through the above judgment, the tilt angle of funnel 1 can be controlled, ensuring that the powder weight reading is not affected by off-center loading. Furthermore, when funnel 1 is placed tilted, the user can quickly correct it without a level by real-time detection of the tilt direction and tilt angle.

[0080] It should be noted that the installation and testing agency first performs a positioning judgment, and then a leveling judgment. When both conditions are met, the green light stays on, and the powder adding action is performed; if the object is only in place but not level, the yellow light flashes and a prompt to level it will appear on the display screen.

[0081] In some embodiments, the weighing pan frame 21 includes a lower mounting ring 213, an upper mounting ring 214, and a support frame 215 located above the upper mounting ring 214. One end of the electronic scale 22 is connected to the support frame 215, and the other end is connected to the side wall of the upper mounting ring 214 through a connecting frame 4.

[0082] It should be explained that the lower assembly ring 213 is located below the upper assembly ring 214. It is a circular or rectangular ring-shaped plate and serves as the installation interface between the entire weighing pan frame 21 and the external support. The central through hole avoids the funnel 1 body, and the funnel 1 body is detachably connected to the lower assembly ring 213.

[0083] The support platform 211 and the crimping part 3 are provided on the lower assembly ring 213. Preferably, at least two sets of support platforms 211 and crimping parts 3 are evenly arranged around the ring body. The support platform 211 is located directly below the crimping part 3, and a clamping gap is formed between the two. The funnel 1 connecting ear 11 is clamped in it.

[0084] Multiple vertical rods extend downward from the bottom surface of the upper assembly ring 214 in a horizontal circular shape, and are rigidly connected to the lower assembly ring 213 through the vertical rods to form a double-layer ring frame.

[0085] The support frame 215 is located above the upper assembly ring 214 and can be connected to the top surface of the upper assembly ring 214 through ribs or flanges to form a horizontal bridge plate or a П-shaped beam, which serves as a fixed reference for one end of the electronic scale 22.

[0086] The other end of the electronic scale 22 is connected to the bracket via the connecting frame 4. Specifically, the bracket can be the mounting frame of the weighing device in this embodiment, or it can be the coffee machine casing used in the weighing device of this embodiment. The connecting frame 4 is an L-shaped folding plate or a short bridge arm, with one end connected and fixed to the bracket, and the other end extending horizontally and locked with the screw at the second end of the electronic scale 22.

[0087] The electronic scale 22 itself is a beam sensor with fixed support at both ends. One end of the electronic scale 22 is locked on the support frame 215, and the other end is connected to the bracket through the connecting frame 4.

[0088] The electronic scale 22 is fixedly supported at both ends, resulting in a short weighing path, high rigidity, and uniform force distribution. This significantly improves its resistance to lateral bending moments and reduces the additional bending moment at the cantilever beam ends, avoiding deflection errors caused by the cantilever structure. Located at the top, away from the coffee powder and tamping areas, the electronic scale 22 effectively reduces the risk of dust intrusion and accidental impacts, balancing performance and durability.

[0089] Preferably, the upper mounting ring 214 and the support frame 215 are integrally formed, which has excellent anti-vibration and anti-eccentricity capabilities, ensuring long-term stable readings; the upper mounting ring 214 and the connecting frame 4 form a modular assembly that can be disassembled as a whole, and during installation, the upper mounting ring 214 only needs to be locked onto the lower mounting ring 213, making the connection convenient.

[0090] In some embodiments, the lower assembly ring 213 is provided with three sets of support platforms 211 spaced circumferentially, preferably evenly distributed at 120° to ensure balanced force. The support platform 211 is a horizontal boss, extending downward from the bottom surface of the lower assembly ring 213 to form a three-lobed claw-type hanging structure. The lower assembly ring 213 and the support platform 211 are provided with cavities 212, and the crimping part 3 is inserted from the cavity 212, positioned above the support platform 211, with space between them to form a clamping gap for the connecting ear 11. There are three notches between the three sets of claws, through which the funnel 1 connecting ear 11 is guided; the width of the notch is greater than the width of the connecting ear 11 to ensure smooth insertion. During operation, any connecting ear 11 is aligned with any notch and inserted vertically, and then slightly rotated at a small angle, the connecting ear 11 slides between the support platform 211 and the crimping part 3; the three sets of crimping parts 3 press down simultaneously to complete the three-point locking. The three-point force forms a self-stabilizing triangle, so the reading remains stable even if the table surface vibrates slightly or there is an operational collision. Three sets of support platforms 211 evenly support the weight of the funnel 1 and the powder, and the pressing part 3 continuously applies a constant pre-tightening force; the electronic scale 22 reads the resultant force and automatically tare, with the eccentricity error approaching zero.

[0091] Furthermore, the support platform 211, cavity 212 and assembly ring are machined as a single unit, resulting in fewer parts, higher rigidity, and easier cleaning. When adapting to funnels 1 of different diameters, only the assembly ring needs to be replaced.

[0092] Based on the coffee powder weighing device provided in the above embodiments, this utility model also provides a coffee machine, which includes any one of the coffee powder weighing devices in the above embodiments. Since this coffee machine uses the coffee powder weighing device in the above embodiments, the beneficial effects of this coffee machine are explained in the above embodiments. The structure of other parts of this coffee machine is explained in the prior art and will not be repeated here.

[0093] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0094] The coffee machine and coffee powder weighing device provided by this utility model have been described in detail above. Specific examples have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model. Therefore, this utility model is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A coffee powder weighing device, characterized in that, include: Funnel (1), the funnel (1) includes a powder cavity for containing coffee powder, and the outer periphery of the funnel (1) is provided with connecting ears (11). The weighing assembly (2) includes an electronic scale (22) and a weighing pan frame (21) for mounting the electronic scale (22); the weighing pan frame (21) has at least two sets of support platforms (211) and pressing parts (3) distributed along the circumferential direction, and the support platforms (211) are located below the pressing parts (3); When the funnel (1) is connected to the weighing assembly (2), the lower surface of the connecting ear (11) is supported on the support platform (211), and the pressing part (3) is pressed against the upper surface of the connecting ear (11).

2. The coffee powder weighing device according to claim 1, characterized in that, The crimping part (3) includes a crimping rod (31) and an elastic element (32) that makes the lower end of the crimping rod (31) continuously press against the upper surface of the connecting ear (11). The weighing pan frame (21) is provided with a cavity (212) for mounting the crimping part (3). The bottom surface of the cavity (212) is provided with a lower opening. The lower end of the crimping rod (31) passes through the lower opening and abuts against the upper surface of the connecting ear (11).

3. The coffee powder weighing device according to claim 2, characterized in that, The middle section of the crimping rod (31) is provided with a radially protruding snap-fit ​​part, the lower end of the elastic element (32) abuts against the snap-fit ​​part, the bottom surface of the cavity (212) forms a snap-fit ​​surface on the outer periphery of the lower opening, the snap-fit ​​part and the snap-fit ​​surface have an overlapping part and abut against the snap-fit ​​surface.

4. The coffee powder weighing device according to claim 3, characterized in that, The top surface of the cavity (212) is provided with an upper opening, the cross-section of which completely covers the cross-section of the snap-fit ​​part, and the crimping rod (31) is inserted into the cavity (212) through the upper opening. The upper opening is covered by a pressure plate (33), and the pressure plate (33) is provided with a guide hole for the crimping rod (31) to extend out.

5. The coffee powder weighing device according to claim 2, characterized in that, The upper surface of the connecting ear (11) is provided with a groove (111) that matches the crimping rod (31). When crimping, the crimping rod (31) is inserted into the groove (111).

6. The coffee powder weighing device according to claim 5, characterized in that, Also includes: A pressure sensor is provided at the connection between the connecting ear (11) and the crimping part (3) to monitor the pressure value applied by the crimping part (3) to the funnel (1); The installation detection mechanism is connected in communication with each of the pressure sensors to determine that the funnel (1) has been correctly installed when the pressure values ​​fed back by all the pressure sensors fall within the set threshold range.

7. The coffee powder weighing device according to claim 6, characterized in that, The pressure sensor is embedded in the bottom surface of the groove (111); the installation and detection mechanism has a built-in flatness detection unit, which is used to determine that the funnel (1) has been placed horizontally when the pressure values ​​fed back by all the pressure sensors are consistent.

8. The coffee powder weighing device according to claim 1, characterized in that, The weighing pan frame (21) includes a lower assembly ring (213), an upper assembly ring (214), and a support frame (215) located above the upper assembly ring (214). One end of the electronic scale (22) is connected to the support frame (215), and the other end is connected to the bracket through the connecting frame (4). The support platform (211) and the pressing part (3) are located on the lower assembly ring (213).

9. The coffee powder weighing device according to claim 8, characterized in that, The lower assembly ring (213) is provided with three sets of support platforms (211) spaced apart along the circumference, and the support platforms (211) extend downward from the bottom surface of the lower assembly ring (213).

10. A coffee machine, characterized in that, Includes the coffee powder weighing device according to any one of claims 1 to 9.

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