Weighing metering device and coffee machine

Abstract

The utility model discloses a kind of weighing metering device and coffee machine, belong to coffee machine technology, the weighing device of existing coffee machine cannot accurately weigh coffee powder, the utility model by the transverse of rod-shaped weighing sensor, it is fixed in the first end of weighing sensor to weighing sensor and exert external force to weighing sensor, the internal stress of weighing sensor is generated by the deformation of external force of weighing support, and weighing is realized, therefore, from the external force of weighing support, all will promote the internal stress of weighing sensor deformation to generate slightly change, sensitivity is high. Moreover, by hoisting funnel support under weighing support and fastening with weighing support, the stability of structure is maintained, when grinding coffee powder, coffee powder falls into funnel assembly in funnel placement position, the gravity of coffee powder can be applied to weighing sensor by funnel support, weighing support and force position is relatively stable, ensure the accuracy of weighing.

Description

Technical Field

[0001] This utility model belongs to the field of coffee machine technology, specifically relating to a weighing and measuring device and a coffee machine. Background Technology

[0002] A coffee grinder is used to grind coffee beans into coffee powder, which is then received by a funnel assembly and brewed into a coffee beverage. The volume of the brewed coffee beverage is related to the quality of the coffee powder; brewing a larger volume requires more coffee powder, and brewing a smaller volume requires less. Therefore, accurate weighing of the coffee powder is essential during grinding, as it directly affects the concentration and taste of the brewed coffee beverage. Existing weighing devices cannot accurately weigh the coffee powder. Utility Model Content

[0003] This invention addresses the deficiency of existing coffee machine weighing devices in accurately weighing coffee powder by providing a weighing and measuring device and coffee machine that can improve weighing accuracy.

[0004] To achieve the above objectives, the weighing and measuring device of this utility model includes:

[0005] Weighing support;

[0006] The load cell is in the shape of a horizontal rod, with its first end fixed to the weighing bracket and its second end extending outward from the weighing bracket.

[0007] The funnel support is suspended below the weighing support and fastened to the weighing support, and has a funnel placement position on it.

[0008] This weighing device works by placing a rod-shaped load cell horizontally and fixing a weighing bracket to the first end of the load cell. An external force is applied to the load cell, and the load cell deforms under the external force of the weighing bracket, generating internal stress to achieve weighing. Therefore, even a slight change in the external force from the weighing bracket will cause the load cell to deform and generate internal stress, resulting in high sensitivity.

[0009] However, the stability of the position where the weighing bracket applies external force to the weighing sensor determines the weighing accuracy of the weighing sensor. If the position where the weighing bracket applies external force to the weighing sensor is prone to change, the same external force will cause different deformations and internal stresses in the weighing sensor, resulting in poor weighing accuracy. Therefore, this weighing and measuring device maintains structural stability by suspending the funnel bracket under the weighing bracket and securing it to the weighing bracket. When grinding coffee powder, the coffee powder falls into the funnel assembly at the funnel placement position. The weight of the coffee powder can be applied to the weighing sensor through the funnel bracket and the weighing bracket, and the force application position is relatively stable, ensuring weighing accuracy.

[0010] Preferably, the lower edge of the weighing bracket has a downward-facing receiving groove, and the weighing sensor is a horizontally placed quadrangular prism. The first end of the weighing sensor is located within the receiving groove, and the upper surface of the first end is firmly attached to the bottom surface of the receiving groove. Accordingly, the load can be transferred more evenly to the weighing sensor through the funnel bracket and the weighing bracket, ensuring weighing accuracy.

[0011] Preferably, the first end of the load cell is fixed to the load cell by tightening fasteners through the load cell support. This ensures a reliable connection between the load cell and the load cell support.

[0012] Preferably, the funnel support is secured to the weighing support by fasteners distributed at varying distances from the load cell. This ensures the positional relationship between the funnel support and the weighing support. Even when the funnel support and the weighing support move up and down due to changes in the weight of the coffee powder, the position of the coffee powder's weight remains constant. This evenly transmits the weight of the funnel assembly placed at the funnel location and the coffee powder it receives to the load cell, ensuring weighing accuracy.

[0013] Preferably, the funnel support has a downwardly extending semi-enclosing wall forming a lateral channel. The lower end of the semi-enclosing wall has an inwardly folded edge, with a downward-facing opening formed in the middle of the inwardly folded edge. The funnel placement position is defined by the semi-enclosing wall and the inwardly folded edge. The funnel placement position has a guide ramp facing the lateral channel and gradually moving away from the lateral channel from top to bottom. Accordingly, the funnel assembly can be accurately placed in the funnel placement position without shifting relative to the load cell. Furthermore, the guide ramp guides the funnel assembly smoothly into the funnel placement position.

[0014] Preferably, a limiting groove is formed on the inner rear side of the semi-enclosed wall, located above the inner folded edge, and the lower end of the guide slope extends to the upper edge of the limiting groove. Accordingly, the funnel assembly placed in the funnel placement position is positioned vertically to avoid tilting.

[0015] Preferably, the rear portion of the semi-enclosed wall has a forward-facing positioning hole for guiding and positioning the funnel assembly.

[0016] To achieve the above objectives, the coffee machine of this utility model includes:

[0017] The machine body contains a grinding device driven by a grinding motor, and the grinding device has a powder inlet;

[0018] The bean hopper, located on top of the machine, is used to supply coffee beans to the grinding unit;

[0019] The weighing and measuring device of this utility model has the second end of the weighing sensor fixed inside the machine body, making the weighing sensor cantilevered, the weighing bracket and the funnel bracket suspended in the air, the funnel placement position exposed outside the machine body, and a vertical powder falling channel connected between the powder falling port and the funnel bracket.

[0020] A funnel assembly, which is placed in the funnel placement position to receive coffee powder ground by the grinder.

[0021] Therefore, the load cell is made to withstand external forces and generate deformation and internal stress like a cantilever beam, so as to accurately weigh and give full play to the function and effect of the load cell.

[0022] Preferably, the machine body is equipped with a limiting part located on the lower side of the weighing bracket or funnel bracket to support the weighing bracket or funnel bracket when it moves downward excessively. This prevents the impact generated when placing the funnel assembly into the funnel placement position or excessive coffee powder from causing excessive deformation of the weighing sensor, exceeding its range, and resulting in inaccurate or damaged weighing sensor.

[0023] Preferably, a gap is maintained between the weighing support and the funnel support, and the limiting part is plate-shaped and located within the gap. This can limit the range of motion of the weighing support and the funnel support in the vertical direction, and also prevent the load cell from deforming too much, exceeding the range of the load cell, and causing the load cell to become inaccurate or damaged.

[0024] Preferably, the limiting part and the load cell are located on opposite sides of the weighing bracket. Within the weighing range of the load cell, the weighing bracket and the funnel bracket are allowed to have a large range of motion in the vertical direction, and even small ranges of motion in the vertical direction can be fed back to the load cell, improving measurement accuracy.

[0025] Preferably, the upper end of the coffee powder dispensing channel is fitted onto the dispensing inlet with a corrugated structure. This facilitates the reduction of friction and tension between the dispensing channel and the dispensing inlet when the weighing support and funnel support move vertically due to the weight of the coffee powder, thus avoiding affecting measurement accuracy. Furthermore, the corrugated structure forms a labyrinth, reducing coffee powder leakage. Additionally, the corrugated structure's ability to slide vertically relative to the dispensing inlet achieves even better results.

[0026] Preferably, the weighing bracket has a first through hole in its middle portion to avoid the coffee powder dispensing channel, and the funnel bracket has a second through hole in its middle portion located above the funnel placement position. The lower end of the coffee powder dispensing channel passes through the first through hole and is inserted into the second through hole. This avoids contact between the coffee powder dispensing channel and the weighing bracket and weighing sensor, preventing measurement errors. When the weighing bracket and funnel bracket move vertically due to changes in the weight of the coffee powder, the friction and tension between the coffee powder dispensing channel and the second through hole are reduced, thus avoiding affecting measurement accuracy. Furthermore, the lower end of the coffee powder dispensing channel can slide vertically relative to the second through hole.

[0027] Preferably, the coffee machine includes a PCB board, and a first grinding start switch and a second grinding start switch are provided on the machine body. The first grinding start switch, the second grinding start switch, the grinding motor and the weighing sensor are connected to the PCB board. The funnel assembly includes a first funnel assembly and a second funnel assembly that have weight and capacity differences.

[0028] When the first funnel assembly is placed in the funnel placement position, the net weight is measured by the weighing sensor and the information is provided to the PCB board. The PCB board starts the grinding motor through the first grinding start switch according to the net weight instruction of the first funnel assembly. When the grinding motor is started through the first grinding start switch, a first weight is set. When the weight measured by the weighing sensor reaches the first weight, the PCB board stops the grinding motor.

[0029] When the second funnel assembly is placed in the funnel placement position, the net weight is measured by the weighing sensor and the information is provided to the PCB board. The PCB board starts the grinding motor through the second grinding start switch according to the net weight instruction of the second funnel assembly. When the grinding motor is started through the second grinding start switch, a second weight is set. When the weight measured by the weighing sensor reaches the second weight, the PCB board stops the grinding motor.

[0030] Therefore, regardless of which funnel component is placed in the funnel placement position, it can be ensured that the operator can operate correctly.

[0031] Preferably, the net weight is zeroed when the grinder motor is started via the first grinder start switch or the second grinder start switch, allowing the weighing sensor to measure the actual weight of the coffee powder. Since the gravity of the funnel assembly varies, zeroing the weight of the funnel assembly ensures accurate measurement of the coffee powder's weight.

[0032] The beneficial effects of this utility model are:

[0033] First, by placing the rod-shaped load cell horizontally and fixing the weighing bracket to the first end of the load cell, an external force is applied to the load cell. The load cell deforms under the force of the weighing bracket, generating internal stress to achieve weighing. Therefore, even a slight change in the external force from the weighing bracket will cause the load cell to deform and generate internal stress, resulting in high sensitivity. Furthermore, by suspending the funnel bracket under the weighing bracket and securing it to the weighing bracket, structural stability is maintained. When grinding coffee powder, the coffee powder falls into the funnel assembly at the funnel placement position. The weight of the coffee powder can be applied to the load cell through the funnel bracket and the weighing bracket, and the force application position is relatively stable, ensuring weighing accuracy.

[0034] Secondly, the machine body is equipped with a limiting part, located on the lower side of the weighing bracket or funnel bracket, to support the weighing bracket or funnel bracket when it moves downwards excessively. This prevents the impact generated when placing the funnel assembly into the funnel placement position or excessive coffee powder from causing excessive deformation of the weighing sensor, exceeding the weighing range of the weighing sensor, and resulting in inaccurate or damaged weighing sensor.

[0035] Third, the upper end of the coffee powder dispensing channel is fitted to the dispensing inlet with a corrugated structure. This reduces friction and tension between the dispensing channel and the dispensing inlet when the weighing support and funnel support move vertically due to the weight of the coffee powder, thus avoiding affecting measurement accuracy. Furthermore, the corrugated structure forms a labyrinth, reducing coffee powder leakage.

[0036] Fourth, the funnel assembly includes a first funnel assembly and a second funnel assembly with differences in weight and capacity. Regardless of which funnel assembly is placed in the funnel placement position, the grinding motor can only be started by the corresponding grinding start switch, which can ensure that the operator can operate correctly.

[0037] Fifth, when any funnel component is placed in its designated position, its net weight is zeroed, allowing the weighing sensor to record the actual weight of the coffee powder. Since the weights of the funnel components vary, zeroing the weight of each component ensures accurate measurement of the coffee powder's weight. Attached Figure Description

[0038] Figure 1 This is a perspective view of the coffee machine of this utility model;

[0039] Figure 2 for Figure 1 A perspective view of the coffee machine shown from another angle;

[0040] Figure 3 for Figure 1-2 A schematic diagram of the coffee machine shown, from one perspective of orthographic projection;

[0041] Figure 4 for Figure 3 Sectional view along axis AA;

[0042] Figure 5 for Figure 4 Enlarged view of part B in the image;

[0043] Figure 6 This is a perspective view of the funnel assembly placed at the funnel placement position in the weighing and measuring device of this utility model.

[0044] Figure 7 To be Figure 6 A schematic diagram showing the funnel assembly being displaced from its placement position in the funnel.

[0045] Figure 8This is an exploded view of the weighing and measuring device of this utility model.

[0046] Figure 9 for Figure 8 A schematic diagram of the structure shown from another perspective;

[0047] Figure 10 for Figure 3-4 A schematic diagram of the weighing and measuring device shown;

[0048] Figure 11 To place a single-cup capacity funnel assembly in Figure 10 A schematic diagram of the weighing and measuring device shown.

[0049] Figure 12 To place the double-cup capacity funnel assembly in Figure 10 A schematic diagram of the weighing and measuring device shown.

[0050] Figure 13 This is a schematic diagram showing the connection between the powder discharge channel, the powder discharge port, and the second through hole of this utility model;

[0051] Figure 14 This is a schematic diagram of the circuit control of this utility model;

[0052] Explanation of the labels in the diagram:

[0053] 100 Body, 110 Grinding motor, 120 Grinding device, 121 Powder inlet, 140 Powder channel, 141 Corrugated structure, 150 Limiting part, 160 PCB board, 170 First grinding start switch, 180 Second grinding start switch.

[0054] 200 bean boxes;

[0055] 300 weighing and measuring device

[0056] 310 Load cell, 311 First terminal, 312 Second terminal.

[0057] 320 Weighing bracket, 321 Receiving groove, 322 First through hole,

[0058] 330 Funnel support, 331 Funnel placement position, 332 Second through hole, 333 Lateral channel, 334 Semi-enclosed wall, 335 Inner folded edge, 336 Opening, 337 Guide slope, 338 Limiting groove, 339 Positioning hole

[0059] 340 gap;

[0060] 400 Funnel assembly, 410 First funnel assembly, 420 Second funnel assembly, 401 First filter box, 402 Second filter box, 403 Housing, 404 Outer flange. Detailed Implementation

[0061] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0062] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this utility model are intended to cover non-exclusive inclusion, such as a method or product that includes a series of technical features, not limited to those technical features explicitly listed, but also including other technical features that may be included in the method or product but not explicitly listed.

[0063] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Among them, "upper" and "lower," "left" and "right," and "front" and "rear" are opposite directions.

[0064] In the description of this utility model, it should be understood that the technical features defined by terms such as "first" and "second" which have a sequential concept are only for the purpose of clearly describing the defined technical features and making the defined technical features clearly distinguishable from other technical features, and do not represent that they are named in this way in actual implementation. Therefore, they should not be construed as limitations on this utility model.

[0065] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings.

[0066] As shown in Figures 1-5, the coffee machine includes a body 100, a bean hopper 200, a weighing and measuring device 300, and a funnel assembly 400.

[0067] The machine body 100 contains a grinding device 120 driven by a grinding motor 110, and the grinding device 120 has a powder dispensing port 121. The machine body is an assembled structure.

[0068] The bean hopper 200 is located on top of the machine body 100. It stores coffee beans and supplies coffee beans to the grinding device 120 when grinding coffee powder.

[0069] Weighing and measuring device 300 Figure 6-12As shown, it includes a weighing support 320, a weighing sensor 310, and a funnel support 330. The weighing sensor 310 is a horizontally placed rod, with its first end 311 fixed to the weighing support 320 and its second end 312 extending outward from the weighing support 330 (shown in the rear) and fixed to a fixed structure inside the machine body 100, making the weighing sensor 310 cantilevered. The funnel support 330 is suspended below the weighing support 320 and fastened to the weighing support, and a funnel placement position 331 is provided on the funnel support 330. In this weighing and metering device, the weighing support and the funnel support are suspended, allowing the weighing sensor to bear the external force from the weighing support and generate deformation and internal stress like a cantilever beam. The funnel placement position 331 is exposed outside the machine body 100, and a vertical powder discharge channel 140 is connected between the powder discharge port 121 and the funnel support 330.

[0070] The funnel assembly 400 is placed in the funnel placement position 331 to receive coffee powder ground by the grinding device and falling through the powder outlet 121 and the powder channel 140.

[0071] This coffee machine is equipped with the aforementioned weighing and measuring device. By placing the rod-shaped weighing sensor horizontally and fixing the weighing bracket to the first end of the weighing sensor, an external force is applied to the weighing sensor. The weighing sensor deforms under the external force of the weighing bracket, generating internal stress to achieve weighing. Therefore, even a slight change in the external force from the weighing bracket will cause the weighing sensor to deform and generate internal stress, resulting in high sensitivity.

[0072] However, the stability of the position where the weighing bracket applies external force to the weighing sensor determines the weighing accuracy of the weighing sensor. If the position where the weighing bracket applies external force to the weighing sensor is prone to change, the same external force will cause different deformations and internal stresses in the weighing sensor, resulting in poor weighing accuracy. Therefore, this weighing and measuring device maintains structural stability by suspending the funnel bracket under the weighing bracket and securing it to the weighing bracket. When grinding coffee powder, the coffee powder falls into the funnel assembly at the funnel placement position. The weight of the coffee powder can be applied to the weighing sensor through the funnel bracket and the weighing bracket, and the force application position is relatively stable, ensuring weighing accuracy.

[0073] like Figure 8-9 As shown, the lower rear edge of the weighing bracket 320 has a downward-facing receiving groove 321. The load cell 310 is a horizontally placed quadrangular prism. The first end 311 of the load cell is located within the receiving groove 321, and the upper surface of the first end is firmly attached to the bottom surface of the receiving groove. Therefore, the load can be transferred more evenly to the load cell through the funnel bracket and the weighing bracket, ensuring weighing accuracy.

[0074] like Figure 8-10 As shown, fasteners passing through the weighing bracket 320 ( Figure 8-10(Used as a dashed line) Tighten the load cell to fix the first end of the load cell to the weighing bracket. Ensure the reliable connection between the load cell and the weighing bracket.

[0075] like Figure 6-9 As shown, the funnel support 330 is secured by fasteners distributed near and far from the load cells. Figure 8-9 The funnel support (represented by a dashed line) is fastened to the weighing bracket 330. Specifically, the funnel support and the weighing bracket are secured by four fasteners, such as screws, located at the four vertices of the rectangle. This ensures the positional relationship between the funnel support and the weighing bracket. Even when the funnel support and the weighing bracket move up and down due to changes in the weight of the coffee powder, the position of the coffee powder's weight remains constant. This evenly transmits the weight of the funnel assembly placed at the funnel placement position and the coffee powder it receives to the weighing sensor, ensuring weighing accuracy.

[0076] like Figure 6-9 As shown, the funnel support 330 has a downwardly extending semi-enclosing wall 334 forming a lateral channel 333. The lower end of the semi-enclosing wall 334 has an inner folded edge 335, with a downward-facing opening 336 formed in the middle of the inner folded edge 335. The funnel placement position 331 is defined by the semi-enclosing wall 334 and the inner folded edge 335. The funnel placement position 331 has a guide slope 337 that faces the lateral channel 333 and gradually decreases in distance from the lateral channel from top to bottom. Accordingly, when the funnel assembly is placed in the funnel placement position 331 via the lateral channel 333, it will not shift relative to the load cell. Furthermore, as... Figure 7 When the funnel assembly 400 is placed in the funnel placement position 331 via the lateral channel 333, the guide ramp 337 guides the funnel assembly 400 smoothly into the funnel placement position, and the outer shell and outlet of the funnel assembly extend downward through the downward-facing opening 336. Furthermore, a limiting groove 338 is formed on the rear inner side of the semi-enclosed wall 334, located above the inner folded edge 335, and the lower end of the guide ramp 337 extends to the upper edge of the limiting groove 338. When the funnel assembly 400 is placed in the funnel placement position 331, the inner folded edge 335 supports the outer flange 404 of the funnel assembly, and the rear outer flange of the funnel assembly is located within the limiting groove 338. Accordingly, the funnel assembly placed in the funnel placement position is positioned vertically to prevent tilting. The rear of the semi-enclosed wall 334 has a forward-facing positioning hole 339 for guiding and positioning the funnel assembly 400. When the funnel assembly 400 is placed in the funnel placement position 331, an outwardly turned edge 404 on the rear side of the funnel assembly... Figure 10 The positioning hole 339 is shown to prevent the funnel assembly from rotating.

[0077] like Figure 5As shown, the machine body 100 is equipped with a limiting part 150, which is located below the weighing bracket 320 or the funnel bracket 330. The limiting part 150 is used to support the weighing bracket or funnel bracket when it moves excessively downwards. This prevents the impact generated when placing the funnel assembly into the funnel placement position, or excessive coffee powder, from causing excessive deformation of the load cell, exceeding its weighing range, and resulting in inaccurate or damaged load cells.

[0078] like Figure 10 As shown, a gap 340 is maintained between the weighing bracket 320 and the funnel bracket 330, and the limiting part 150 is as follows. Figure 5 The plate-like structure is located within the gap 340. This limits the vertical movement of the weighing support and the funnel support, and also prevents excessive deformation of the load cell, which could exceed its range and cause inaccuracy or damage to the load cell.

[0079] like Figure 5 As shown, the limiting part 150 and the weighing sensor 310 are located on the front and rear sides of the weighing bracket 320, respectively. Within the range of the weighing sensor, the weighing bracket and the funnel bracket are allowed to have a large range of motion in the vertical direction, and even small ranges of motion in the vertical direction of the weighing bracket and the funnel bracket can be fed back to the weighing sensor, thereby improving measurement accuracy.

[0080] like Figure 5 , Figure 13 As shown, the upper end of the coffee powder dispensing channel 140 is fitted onto the coffee powder dispensing port 121 via a corrugated structure 141. This facilitates the reduction of friction and tension between the dispensing channel and the dispensing port when the weighing support and funnel support move vertically due to the weight of the coffee powder, thus avoiding affecting measurement accuracy. Furthermore, the corrugated structure forms a labyrinth, reducing coffee powder leakage. Moreover, the corrugated structure's ability to slide vertically relative to the dispensing port achieves even better results.

[0081] like Figure 8 As shown, the weighing support 320 has a first through hole 322 in its middle portion to avoid the powder falling channel 140, and the funnel support 330 has a second through hole 332 in its middle portion located above the funnel placement position 331. The lower end of the powder falling channel 140 passes through the first through hole 322 as shown. Figure 13 The device is inserted into the second through hole 332. When grinding coffee powder, the coffee powder falls from the lower end of the powder feeding channel into the funnel assembly 400 located at the funnel placement position 331 below. This avoids measurement errors caused by contact between the powder feeding channel and the weighing bracket and weighing sensor. When the weighing bracket and funnel bracket move vertically due to the weight of the coffee powder, the friction and pulling between the powder feeding channel and the second through hole are reduced, thus avoiding affecting measurement accuracy. Furthermore, the lower end of the powder feeding channel can slide vertically relative to the second through hole.

[0082] like Figure 14 As shown, the coffee machine includes a PCB board 160. The body 100 has... Figure 1-3 The diagram shows a first grinding start switch 170 and a second grinding start switch 180. The first grinding start switch 170, the second grinding start switch 180, the grinding motor 110, and the weighing sensor 310 are connected to a PCB board 160. The funnel assembly 400 includes a first funnel assembly 410 and a second funnel assembly 420 with differences in weight and capacity. The weight and capacity differences between the first and second funnel assemblies are reflected in… Figure 11-12 The first filter box 401 and the second filter box 402 are shown. The first filter box 401 and the second filter box 402 are detachable from the housing 403. Therefore, the first funnel assembly 410 and the second funnel assembly 420 share the same housing 403; that is, a housing 403, the first filter box 401, and the second filter box 402 can be assembled to form the first funnel assembly and the second funnel assembly. The first filter box 401 is placed inside the housing 403 to form the first funnel assembly 410, and the second filter box 402 is placed inside the housing 403 to form the second funnel assembly 420.

[0083] When the first funnel assembly 410 is placed in the funnel placement position 311, the net weight is measured by the weighing sensor 310 and the information is provided to the PCB board 160. The PCB board 160 starts the grinding motor 110 through the first grinding start switch 170 according to the net weight instruction of the first funnel assembly, and locks the second grinding start switch 180 so that it cannot be started. When the grinding motor 110 is started through the first grinding start switch 170, a first weight is set (such as the weight of coffee powder required to brew a single cup of coffee beverage). When the weight measured by the weighing sensor reaches the first weight, the PCB board stops the grinding motor.

[0084] When the second funnel assembly 420 is placed in the funnel placement position 311, the net weight is measured by the weighing sensor 310 and the information is provided to the PCB board 160. The PCB board 160 starts the grinding motor 110 through the second grinding start switch 180 according to the net weight instruction of the second funnel assembly, and locks the first grinding start switch 170 so that it cannot be started. When the grinding motor is started through the second grinding start switch, a second weight is set (such as the weight of coffee powder required to brew a double cup coffee beverage). When the weight measured by the weighing sensor reaches the second weight, the PCB board stops the grinding motor.

[0085] Therefore, regardless of which funnel component is placed in the funnel placement position, it can be ensured that the operator can operate correctly.

[0086] Furthermore, when the grinding motor is started via the first grinding start switch or the second grinding start switch, the net weight of the first funnel assembly 410 or the second funnel assembly 420 is zeroed, allowing the weighing sensor 310 to measure the actual weight of the coffee powder. Since the weights of the funnel assemblies differ, zeroing the weight of the funnel assemblies ensures accurate measurement of the coffee powder's weight.

Claims

1. A weighing and measuring device, characterized in that: include: Weighing support (320); The load cell (310) is a horizontal rod with its first end (311) fixed to the weighing bracket (320) and its second end (312) extending outward from the weighing bracket (320). A funnel support (330) is suspended below the weighing support (320) and fastened to the weighing support, and a funnel placement position (331) is provided on it.

2. The weighing and measuring device according to claim 1, characterized in that: The lower edge of the weighing bracket (320) has a downward-facing receiving groove (321). The weighing sensor (310) is a horizontally placed quadrangular prism. The first end (311) of the weighing sensor (310) is located in the receiving groove (321) and the upper surface of the first end is attached and fastened to the bottom surface of the receiving groove.

3. The weighing and measuring device according to claim 1 or 2, characterized in that: Secure the first end of the load cell to the load cell by tightening the fastener through the load cell bracket (320) onto the load cell bracket (310).

4. The weighing and measuring device according to claim 1, characterized in that: The funnel support (330) is fastened to the weighing support (320) by fasteners distributed near and far from the relative weighing sensor (310).

5. The weighing and measuring device according to claim 1, characterized in that: The funnel support (330) has a semi-enclosed wall (334) extending downward to form a lateral channel (333), the lower end of the semi-enclosed wall (334) has an inner fold (335), the middle of the inner fold (335) forms a downward opening (336), the funnel placement position (331) is defined by the semi-enclosed wall (334) and the inner fold (335), and the funnel placement position (331) has a guide slope (337) facing the lateral channel and gradually moving away from the lateral channel from top to bottom.

6. The weighing and measuring device according to claim 5, characterized in that: A limiting groove (338) is formed on the inner rear side of the semi-enclosed wall (334) above the inner fold (335), and the lower end of the guide slope (337) extends to the upper edge of the limiting groove (338).

7. The weighing and measuring device according to claim 6, characterized in that: The rear of the semi-enclosed wall (334) has a forward-facing positioning hole (339).

8. A coffee machine, characterized by: include: The machine body (100) has a grinding device (120) driven by a grinding motor (110) inside the machine body, and the grinding device has a powder inlet (121). A bean hopper (200), located on top of the body (100), is used to supply coffee beans to the grinding device (120); In any one of claims 1-7, the weighing and measuring device (300) has the second end (312) of the weighing sensor (310) fixed inside the body, making the weighing sensor cantilevered, the weighing bracket (320) and the funnel bracket (330) suspended, the funnel placement position (331) exposed outside the body (100), and a vertical powder discharge channel (140) connected between the powder discharge port (121) and the funnel bracket (330). A funnel assembly (400) is placed in a funnel placement position (331) to receive coffee powder ground by a coffee grinder.

9. The coffee machine according to claim 8, characterized in that: The machine body (100) is provided with a limiting part (150), which is located on the lower side of the weighing support (320) or the funnel support (330) to support the weighing support or the funnel support when it moves too far downward.

10. The coffee machine according to claim 9, characterized in that: A gap (340) is maintained between the weighing support (320) and the funnel support (330), and the limiting part (150) is plate-shaped and located within the gap (340).

11. The coffee machine according to claim 9 or 10, characterized in that: The limiting part (150) and the weighing sensor (310) are located on opposite sides of the weighing bracket (320).

12. The coffee machine according to claim 8, characterized in that: The upper end of the powder dispensing channel (140) is fitted onto the powder dispensing port (121) via a corrugated structure (141).

13. The coffee machine according to claim 12, characterized in that: The corrugated structure (141) can slide up and down relative to the powder outlet (121).

14. The coffee machine according to claim 8, 12 or 13, characterized in that: The weighing bracket (320) has a first through hole (322) in the middle to avoid the powder falling channel (140), and the funnel bracket (330) has a second through hole (332) in the middle above the funnel placement position (331). The lower end of the powder falling channel (140) passes through the first through hole (322) and is inserted into the second through hole (332).

15. The coffee machine according to claim 14, characterized in that: The lower end of the powder drop channel (140) can slide up and down relative to the second through hole (332).

16. The coffee machine according to claim 8, characterized in that: The coffee machine includes a PCB board (160), a first grinding start switch (170) and a second grinding start switch (180) on the machine body, the first grinding start switch (170), the second grinding start switch (180), the grinding motor (120) and the weighing sensor (310) are connected to the PCB board (160), and the funnel assembly (400) includes a first funnel assembly (410) and a second funnel assembly (420) with weight and capacity differences. When the first funnel assembly (410) is placed in the funnel placement position (331), the net weight is measured by the weighing sensor (310) and the information is provided to the PCB board (160). The PCB board (160) starts the grinding motor through the first grinding start switch (170) according to the net weight instruction of the first funnel assembly. When the grinding motor is started through the first grinding start switch, a first weight is set. When the weight measured by the weighing sensor reaches the first weight, the PCB board stops the grinding motor. When the second funnel assembly (420) is placed in the funnel placement position (331), the net weight is measured by the weighing sensor (310) and the information is provided to the PCB board (160). The PCB board (160) starts the grinding motor through the second grinding start switch (180) according to the net weight instruction of the second funnel assembly. When the grinding motor is started through the second grinding start switch, a second weight is set. When the weight measured by the weighing sensor reaches the second weight, the PCB board stops the grinding motor.

17. The coffee machine according to claim 8, characterized in that: When the grinding motor is started by the first grinding start switch or by the second grinding start switch, the net weight is zeroed, and the weighing sensor weighs the actual weight of the coffee powder.

Images