Coffee brewing device with residue returning function

Abstract

The utility model relates to a coffee brewing device with a residue returning function, which comprises an extraction unit mounted on a base, a linear transmission module drives the extraction unit to reciprocate on the base along an axis L, and the linear transmission module is provided with a powder receiving position and a brewing position; the extraction unit comprises a powder cup with an extraction cavity and a powder pushing seat arranged in the powder cup; the powder pushing seat moves along the axis of the powder cup in the extraction cavity, so that the powder cup has a powder receiving mode for receiving coffee powder and a powder scraping mode for ejecting pressed powder out; a transmission part is arranged on the machine base along an axis L, a push-out gear in transmission connection with the transmission part is arranged on the extraction unit, and the transmission part drives the push-out gear, so that relative movement is generated between the powder pushing seat and the powder cup; a clutch mechanism is arranged between the transmission part and the push-out gear and enables the transmission part to have a separation position and a transmission position relative to the push-out gear.

Description

Technical Field

[0001] This utility model relates to the field of electrical equipment technology for brewing coffee, and in particular to a coffee brewing device with a grounds removal function. Background Technology

[0002] A fully automatic coffee machine is an appliance that can complete the entire coffee brewing process, including tamping, brewing, and removing coffee grounds. During use, coffee grounds enter the brewing chamber and are tamped into a coffee puck. Hot water passes through the coffee puck for extraction. The extracted coffee puck is pushed out by the pusher and scraped off by the scraper.

[0003] With the advancement of science and technology, people have placed additional demands on coffee machines beyond just brewing coffee, such as small size, light weight, and ease of operation. However, current smart coffee machines require electric drive structures for functions such as brewing chamber movement, tamping, venting, scraping, and resetting. This excessive use of drive structures not only reduces the machine's functional stability but also occupies a significant amount of internal space, thus limiting its overall size.

[0004] Chinese patent application CN117397986A discloses a fully automatic brewing structure and coffee machine. The fully automatic brewing structure includes a main support frame, a brewing head, and a brewing unit. The main support frame includes a front side plate, a rear side plate, a left side plate, a right side plate, and a top plate. The brewing head and brewing unit are housed within a space enclosed by these interconnected panels. The front side plate has an outward-sloping powder inlet and a coffee machine. The brewing cup can move up and down with the brewing head, working together to brew coffee, and can also collect, compact, and clean the brewed coffee puck with the puck pusher assembly. This achieves efficient coordination between the brewing and grinding structures. Furthermore, the brewing cup is detachably mounted on a brewing cup holder, allowing for convenient and quick removal for thorough cleaning and maintenance, thus improving the deliciousness and health benefits of the coffee machine.

[0005] However, in this coffee machine, the brewing cup is driven or reset by multiple push rods. The transmission effect is not stable, and it is easy to get stuck during the pushing process, resulting in transmission failure. Utility Model Content

[0006] In order to solve the above-mentioned problems in the prior art, the present invention provides a coffee brewing device with a residue removal function.

[0007] The above-mentioned problems of this utility model are solved by the following technical solution:

[0008] A coffee brewing device with a grounds removal function includes an extraction unit mounted on a base, and a linear drive module drives the extraction unit to reciprocate along axis L on the base, having a powder receiving position and a brewing position;

[0009] The extraction unit includes a coffee cup with an extraction chamber and a coffee pusher located inside the coffee cup; the coffee pusher moves along the axis of the coffee cup within the extraction chamber, so that the coffee cup has a coffee receiving mode for receiving coffee powder and a coffee scraping mode for pushing out the coffee puck.

[0010] The axis L is the central axis of the powder cup in the extraction state;

[0011] A transmission component is provided on the base along the axis L. An extraction unit is provided with a push-out gear that is connected to the transmission component. The transmission component drives the push-out gear to generate relative motion between the powder pusher and the powder cup.

[0012] A clutch mechanism is provided between the transmission component and the ejection gear, and the clutch mechanism enables the transmission component to have a disengaged position and a transmission position relative to the ejection gear;

[0013] When the extraction unit is in the extraction stroke from the powder receiving position to the brewing position, the transmission component is in the separation position and is separated from the ejection gear;

[0014] When the extraction unit is in the reset stroke from the brewing position to the powder receiving position, the transmission component is in the transmission position and the ejection gear is in a transmission connection state.

[0015] A further provision of the above technical solution is that the clutch mechanism includes a one-way top block disposed on the linear transmission module, and a stop bar is provided on the transmission component; the stop bar is located on the moving path of the one-way top block;

[0016] The transmission component is movably mounted on the machine base;

[0017] During the extraction process, the one-way top block moves synchronously with the linear transmission module, driving the stop bar and pushing the transmission component from the transmission position to the separation position, thus separating it from the ejection gear.

[0018] During the reset stroke, the stop bar is not subjected to external force, and the transmission component is reset to the transmission position under the action of the reset component, and is connected to the push-out gear transmission.

[0019] A further configuration of the above technical solution is as follows: the linear transmission module includes a lead screw arranged along the axis L, and a lead screw sleeve that slides in cooperation with the lead screw; the one-way top block is rotatably connected to the lead screw sleeve and extends toward the transmission component;

[0020] The lower end of the stop bar is provided with an inclined guide surface.

[0021] A further provision of the above technical solution is that: the lead screw sleeve extends outward to provide a top block mounting platform, and the top block mounting platform provides a one-way stop for the one-way top block;

[0022] The two ends of the unidirectional top block along the axis L are configured as abutment surface and driving surface;

[0023] During the brewing process, the top block mounting platform stops the drive surface, causing the contact surface to generate a thrust on the guide surface, which pushes the transmission components to move away from the ejection gear;

[0024] During the reset stroke, the upper end of the stop bar generates a thrust on the drive surface, causing the one-way top block to rotate.

[0025] A further configuration of the above technical solution is as follows: the extraction unit includes a mounting frame and a cup holder for mounting the powder cup, the powder pusher is fixed on the mounting frame, and the push-out gear is rotatably mounted on the cup holder;

[0026] The ejector gear is provided with ejector teeth and transmission teeth in sequence along the axial direction;

[0027] The transmission component is configured as a rack, and the transmission teeth mesh with the teeth of the transmission component during the reset stroke;

[0028] The cup holder is provided with a rack that meshes with the push-out teeth. When the push-out gear rotates, it moves the cup holder so that the powder cup moves synchronously with the cup holder, thereby creating relative movement between the powder pusher and the powder pusher.

[0029] A further provision of the above technical solution is that: the cup holder is provided with a meshing groove that can accommodate the rotation of the push-out teeth; two racks are provided and symmetrically arranged on both sides of the meshing groove; the two racks mesh and drive the push-out teeth in sequence.

[0030] A further provision of the above technical solution is that: the base is provided with a transmission groove arranged along the axis L, and the transmission component is located on the side of the transmission groove;

[0031] Rotating teeth are provided on the transmission groove at the powder receiving position of the extraction unit;

[0032] The extraction unit is equipped with a reversing gear that meshes with the rotating gear.

[0033] A further provision of the above technical solution is that the rotating tooth is located at the corner position of the transmission groove; and the reversing gear is provided with arc-shaped teeth.

[0034] A further provision of the above technical solution is that it also includes a scraper, the scraper being hinged to the machine base, and the scraper being held in a first clearance position by an elastic element;

[0035] The linear transmission module is equipped with a scraper drive unit, which drives the drive end of the scraper to rotate from the first avoidance position past the brewing head to the second avoidance position.

[0036] A further feature of the above technical solution is that the driving end is provided with a spiral actuation surface.

[0037] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0038] 1. By integrating multiple functions into an extraction unit driven by a linear drive mechanism and a reversing drive mechanism, the use of multiple independent electric drive structures in traditional coffee machines is reduced, thereby reducing the overall size of the machine and improving space utilization.

[0039] 2. Through the coordinated design of the powder ejection mechanism and the scraper mechanism, the automatic ejection and cleaning of the powder compact is achieved without manual intervention, thus improving the degree of automation. Attached Figure Description

[0040] Figure 1 This is a schematic diagram of the structure of this utility model.

[0041] Figure 2 This is an exploded structural diagram of each unit in this utility model.

[0042] Figure 3 This is a schematic diagram of the connection structure between the extraction unit and the movable rack.

[0043] Figure 4 This is a schematic diagram of the powder receiving mode of this utility model.

[0044] Figure 5 This is a schematic diagram of the extraction mode of this utility model.

[0045] Figure 6 This is a schematic diagram of the transmission component in the transmission position.

[0046] Figure 7 This is a schematic diagram showing the transmission components in the separated position.

[0047] Figure 8 for Figure 2 Enlarged structural diagram of part A in the middle.

[0048] Figure 9 This is a schematic diagram showing the position and structure of the unidirectional top block on the linear drive module.

[0049] Figure 10 This is a schematic diagram of the decomposed structure of the extraction unit.

[0050] Figure 11This is a schematic diagram of the cross-sectional structure of the powder cup in powder receiving mode.

[0051] Figure 12 This is a schematic diagram of the cross-sectional structure of the powder cup in powder scraping mode.

[0052] Figure 13 This is a schematic diagram of the scraper's structure.

[0053] Figure 14 This is an exploded structural diagram of the base, limit sleeve, and ejection gear.

[0054] The attached diagram is labeled as follows: 1. Base; 1.1. Transmission groove; 1.11. Rack groove; 1.12. Limiting groove; 1.13. Rotating gear; 2. Grinding unit; 2.1. Powder outlet; 3. Brewing head; 4. Extraction unit; 5. Linear transmission module; 5.1. Lead screw; 5.2. Lead screw sleeve; 6. One-way top block; 6.1. Abutment surface; 6.2. Drive surface; 7. Spring; 8. Top block mounting platform; 9. Scraper; 9.1. Drive end; 9.2. Blade; 11. Mounting base; 12. Scraper drive unit; 13. Elastic element; 9.11. Actuating surface;

[0055] 100. Powder cup; 101. Extraction chamber;

[0056] 200. Powder pusher seat;

[0057] 300. Transmission component; 310. Stop bar; 311. Guide surface; 320. Short shaft;

[0058] 400. Mounting bracket; 401. Engaging groove; 410. Ejecting rack; 420. Retracting rack;

[0059] 500, cup holder;

[0060] 10. Eject the gear; 10.1. Drive gear; 10.2. Eject the gear;

[0061] 20. Reversing gear; 21. Reversing tooth section. Detailed Implementation

[0062] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0063] like Figure 1-12 As shown in the figure, this embodiment discloses a coffee brewing device with a residue removal function.

[0064] Specific reference Figure 1As shown, it includes an extraction unit 4 mounted on a base 1, and a linear drive module 5 drives the extraction unit 4 to reciprocate along the axis L on the base 1, having a powder receiving position and a brewing position.

[0065] The extraction unit 4 includes a coffee cup 100 with an extraction chamber 101 and a coffee pusher 200 disposed inside the coffee cup 100; the coffee pusher 200 moves along the axis of the coffee cup 100 within the extraction chamber 101, so that the coffee cup 100 has a coffee receiving mode for receiving coffee powder and a coffee scraping mode for pushing out the coffee puck.

[0066] Specific reference Figure 3 As shown, a transmission component 300 is provided on the base 1 along the axis L, and an extraction unit 4 is provided with an ejection gear 10 that is connected to the transmission component 300. The transmission component 300 drives the ejection gear 10, so that the powder pusher 200 and the powder cup 100 generate relative movement.

[0067] A clutch mechanism is provided between the transmission component 300 and the ejection gear 10, and the clutch mechanism enables the transmission component 300 to have a disengaged position and a transmission position relative to the ejection gear 10.

[0068] When the extraction unit 4 is in the extraction stroke from the powder receiving position to the brewing position, the transmission component 300 is in the separation position and is separated from the ejection gear 10;

[0069] When the extraction unit 4 is in the reset stroke from the brewing position to the powder receiving position, the transmission component 300 is in the transmission position and is in a transmission connection state with the ejection gear 10.

[0070] The above is the basic scheme of this embodiment.

[0071] Reference Figure 1 and Figure 2 As shown, in this embodiment, the base 1 is also equipped with a grinding unit 2 and a brewing head 3. The grinding unit 2 has a grinding chamber and a powder inlet 2.1 communicating with the grinding chamber; the powder receiving position of the extraction unit 4 is located below the grinding unit 2, and the powder inlet 2.1 feeds powder to the extraction unit 4 in a vertically downward manner. The brewing head 3 is located at the brewing position of the extraction unit 4 and can extend into the extraction chamber 101 to press the coffee powder in the extraction chamber 101 into a coffee cake for brewing. The brewing head 3 has a liquid outlet channel; the base 1 is equipped with a steering mechanism to rotate and change the opening direction of the extraction unit 4.

[0072] Furthermore, in this embodiment, the direction of the powder feeding port 2.1 is set at an acute angle to the axis of the brewing head 3. In this way, the extraction unit 4 can receive coffee powder below the grinding unit 2 and move along the inclined direction to the brewing head 3 to extract coffee liquid, which not only significantly shortens the mechanical movement stroke, but also improves the operating efficiency of the equipment.

[0073] In this embodiment, the linear transmission module 5 is arranged along the direction of axis L, that is, the extraction unit 4 is linearly transported along the inclined direction.

[0074] In this embodiment, the axis L is the central axis of the powder cup 100 in the extraction state, and the axis L is also the central axis of the brewing head 3.

[0075] In this embodiment, when the coffee powder pusher 200 is located at the bottom of the coffee powder cup 100, the extraction chamber 101 has space to receive the coffee powder, which is the powder receiving state; when the coffee powder pusher 200 moves to the upper part of the coffee powder cup 100 and is at least level with the upper opening of the coffee powder cup 100, external coffee powder cannot enter the extraction chamber 101, which is the powder scraping state, see reference. Figure 11 and Figure 12 As shown.

[0076] In actual use of this device for coffee extraction, the extraction unit 4, loaded with coffee powder, moves to the brewing position under the drive of the linear transmission module 5 and the steering mechanism. The brewing head 3 extends into the extraction chamber 101 of the coffee caddy 100, pressing the loose coffee powder in the extraction chamber 101 into a coffee pouch, which is firmly held between the end face of the brewing head 3 and the coffee maker's feeder 200. The water supply device in the coffee machine supplies water to the coffee maker's feeder 200, and the high-pressure water flow is output from the feeder 200 to the extraction chamber 101. Under pressure, the water flow penetrates the coffee pouch, fully extracting the essence of the coffee pouch. Finally, the extracted coffee liquid is output through the liquid outlet channel inside the brewing head 3.

[0077] After extraction, the linear drive module 5 drives the extraction unit 4 to reset and disengage from the brewing head 3. Under the action of the powder removal mechanism, the powder pusher 200 completely pushes out the waste powder cake, and the scraper 9 on the base 1 scrapes the powder cake off the powder pusher 200 and collects it.

[0078] In this embodiment, the movement trajectory of the extraction unit 4 is as follows: When the device is started and initialized, the extraction unit 4 is positioned directly below the coffee powder inlet 2.1, the coffee powder cup 100 is in a horizontal coffee powder receiving state, and the extraction chamber 101 is facing upwards and in coffee powder receiving mode to perfectly receive the falling coffee powder. (Refer to...) Figure 4 As shown. After the powder receiving process is completed, the linear drive module 5 causes the extraction unit 4 to enter the extraction stroke along the preset axis L. At the same time, the steering mechanism rotates the powder cup 100 from the powder receiving angle facing the powder inlet 2.1 to the extraction angle facing the brewing head 3. The linear drive module 5 continues to advance, delivering the extraction unit 4 to the preset brewing position, ensuring that the brewing head 3 can be fully inserted, as shown. Figure 5 As shown.

[0079] During the extraction process described above, the clutch mechanism keeps the transmission component 300 in a disengaged position, separate from the ejector gear 10, and cannot drive the ejector gear 10. That is, the powder pusher 200 is in a fixed state relative to the powder cup 100.

[0080] After the extraction process is completed, the linear transmission module 5 moves in the reverse direction. During the reset stroke, the clutch mechanism fails, the transmission component 300 resets to the transmission position, and meshes with the ejection gear 10 to drive the ejection gear 10. The ejection gear 10 rotates, changing the relative position between the powder pusher 200 and the powder cup 100, completing the switching of the working mode, and completely pushing the powder cake out of the powder cup 100.

[0081] In this embodiment, refer to Figure 2 As shown, in order to facilitate assembly and reasonable layout, a transmission groove 1.1 arranged along the axis L is provided on the base 1 in this embodiment. The entire transmission system is installed in the back space of the base 1 and the power is transmitted to the front extraction unit 4 through the transmission groove 1.1. This design not only ensures the stability of mechanical transmission, but also facilitates daily cleaning and maintenance.

[0082] Furthermore, in this embodiment, the steering mechanism is configured such that a rotating tooth 1.13 is provided on the transmission groove 1.1 at the powder receiving position of the extraction unit 4;

[0083] The extraction unit 4 is provided with a reversing gear 20 that cooperates with the rotating gear 1.13.

[0084] Reference Figure 10 and Figure 14 As shown, in this embodiment, the reversing gear 20 is located on the back of the extraction unit 4 to drive the entire extraction unit 4. The reversing gear 20 is provided with a reversing tooth 21 that meshes with the rotating tooth 1.13. The reversing tooth 21 is located at the powder receiving position of the extraction unit 4. When the extraction unit 4 moves close to the powder receiving position or after the powder receiving is completed, the direction is switched.

[0085] To ensure the stability of the transmission structure, in this embodiment, the reversing gear 20 is limited and positioned in the extraction unit 4. At the same time, the reversing gear 20 has an installation shaft extending towards the extraction unit 4, and the ejection gear 10 is limited and sleeved on the installation shaft, so that the reversing gear 20 and the ejection gear 10 rotate coaxially.

[0086] The rotating tooth 1.13 is located at the corner of the transmission groove 1.1; the reversing gear 20 is provided with arc-shaped teeth.

[0087] At the same time, the reversing gear 20 forms a meshing transmission relationship with these rotating teeth 1.13.

[0088] When the linear drive module 5 starts working and drives the entire extraction unit 4 to make a smooth linear displacement along the track of the transmission groove 1.1, the reversing gear 20 and the rotating teeth 1.13 on the inner side of the transmission groove 1.1 engage continuously. The gear meshing transmission mechanism can effectively convert linear motion into rotational motion, thereby driving the extraction unit 4 to produce precise rotational movements. Through this conversion, the powder cup 100 can achieve a smooth switch from the initial powder receiving state to the final extraction state, and the whole process runs smoothly and is accurately positioned.

[0089] In this embodiment, the clutch mechanism is controlled by a mechanical transmission structure. Specifically, the clutch mechanism includes a one-way top block 6 disposed on the linear transmission module 5, and a stop bar 310 is provided on the transmission component 300; the stop bar 310 is located on the moving path of the one-way top block 6.

[0090] The transmission component 300 is movably mounted on the base 1;

[0091] During the extraction process, the one-way top block 6 moves synchronously with the linear transmission module 5, driving the stop bar 310 and driving the transmission component 300 from the transmission position to the separation position, thus separating it from the ejection gear 10.

[0092] During the reset stroke, the stop bar 310 is not subjected to external force, and the transmission component 300 is reset to the transmission position under the action of the reset component, and is connected to the push-out gear 10 for transmission.

[0093] Specific reference Figure 6 As shown, during the reset stroke, when the linear drive module 5 starts to drive the extraction unit 4, the transmission component 300 is in the transmission position, that is, the ejection gear 10 and the transmission component 300 are connected in transmission. When the linear drive module 5 drives the extraction unit 4 to move along the axis L, the ejection gear 10 moves on the transmission component 300, and under the transmission action of the transmission component 300, the ejection gear 10 rotates, driving the powder pusher 200 or the powder cup 100 to move, and a relative displacement along the axial direction is generated between the two, so that the powder pusher 200 pushes the powder cake to the outside of the opening of the powder cup 100.

[0094] During the extraction process, the one-way push block 6 moves synchronously along the axis L with the linear drive module 5. Due to the obstruction of the stop bar 310, the movement of the one-way push block 6 is interfered with. At this time, the one-way push block 6 applies a pushing force to the stop bar 310, pushing it away from its own movement path. This pushing force causes the transmission component 300 to move towards the outside of the rack groove 1.11, moving the transmission component 300 from its original transmission position to the separation position, as detailed in the following section. Figure 7As shown. In this disengaged position, the transmission connection between the transmission component 300 and the ejection gear 10 is severed, preventing effective power transmission. This design ensures rapid switching of transmission states under specific operating conditions.

[0095] Specifically, refer to Figure 8 As shown, a rack groove 1.11 matching the transmission component 300 is provided on the outer side of one side of the transmission groove 1.1 on the end face of the base 1. The transmission component 300 is installed in the rack groove 1.11, so that the teeth of the transmission component 300 can accurately extend into the working area of ​​the transmission groove 1.1. This design ensures both transmission accuracy and stability of the mechanism.

[0096] In this embodiment, the reset element is a spring 7 located within the rack groove 1.11. Simultaneously, to limit the range of motion of the transmission component 300, appropriately deep limiting grooves 1.12 are provided at both ends of the rack groove 1.11. (Refer to...) Figure 8 As shown, the end of the transmission component 300 is reliably confined within these limiting grooves 1.12 by a short shaft 320. This design ensures that the transmission component 300 can move freely within a certain range while preventing it from dislodging. Furthermore, multiple springs 7 with appropriate elasticity are installed between the bottom of the rack groove 1.11 and the back of the transmission component 300. The springs 7 are confined within the rack groove 1.11 by spring grooves, continuously pushing the transmission component 300 outwards. The transmission component 300 moves by rotating around the short shaft 320. The reset side and the transmission side of the transmission component 300, which contact the springs 7, are located on opposite sides of the short shaft 320. When the one-way push block 6 pushes the transmission side out, the reset side rotates towards the rack groove 1.11, compressing the spring 7. See [reference needed] for details. Figure 7 As shown.

[0097] When the thrust of the one-way top block 6 on the transmission side is removed, the spring 7 pushes out the reset side, and the reset side rotates outward. The transmission side rotates back towards the rack groove 1.11 side in sync, forming a transmission with the push-out gear 10.

[0098] In this embodiment, the transmission component 300 is configured as a rack and pinion, which meshes with the push-out gear 10 to perform transmission.

[0099] A one-way push block 6 is movably mounted on the linear transmission module 5. Simultaneously, a stop bar 310 is provided on the back of the transmission component 300, located on the moving path of the one-way push block 6. When the one-way push block 6 begins to move, it contacts the stop bar 310 and pushes it outward, thereby causing the entire transmission component 300 to displace. Through this design, the transmission component 300 can switch between a separated position away from the rack groove 1.11 and a transmission position close to the rack groove 1.11, achieving different operating states.

[0100] In this embodiment, the specific driving structure for the one-way top block 6 and the stop bar 310 is set as follows: the linear transmission module 5 includes a lead screw 5.1 arranged along the axis L, and a lead screw sleeve 5.2 that slides with the lead screw 5.1; the one-way top block 6 is rotatably connected to the lead screw sleeve 5.2 and extends toward the transmission component 300.

[0101] The lower end of the baffle 310 is provided with an inclined guide surface 311.

[0102] To optimize the driving effect of the one-way top block 6 on the stop bar 310, the lower end of the stop bar 310 is machined into an inclined guide surface 311 in this embodiment. When the one-way top block 6 moves along the axis L, its end will contact this guide surface 311 and generate a thrust perpendicular to the guide surface 311 outward. Through the principle of force decomposition, this thrust can generate two components: one component is directed towards the outside of the rack groove 1.11, and this component can effectively drive the transmission component 300 to move outward until it reaches the preset separation position.

[0103] When the extraction unit 4 accurately reaches the extraction position under the action of the linear transmission module 5, a significant change occurs in the system state. At this time, the one-way top block 6 has moved to the top position of the transmission component 300, and its pushing force on the stop bar 310 disappears. In this situation, the pre-set spring 7 begins to function, automatically pulling the transmission component 300 back to the transmission position and engaging with the ejection gear 10 of the extraction unit 4.

[0104] After the extraction process is completed, the linear drive module 5 activates the reverse drive, driving the extraction unit 4 to perform reverse linear motion. During this process, the stop bar 310 remains on the reset path of the one-way top block 6. When the one-way top block 6 begins to move, the force exerted by the stop bar 310 on it drives the one-way top block 6 to complete its rotation. This rotation causes the extended part of the one-way top block 6 to rotate to the other side, turning away from the position of the stop bar 310, ensuring that it cannot exert a pushing force on the transmission component 300. This design ensures that the transmission component 300 can be stably maintained in the transmission position, providing a reliable guarantee for the continuous operation of the system.

[0105] Specific reference Figure 9 As shown, the linear transmission module 5 uses a commonly used lead screw 5.1 transmission structure in the prior art, including a lead screw 5.1 and a lead screw sleeve 5.2 sliding on the lead screw 5.1; the driving component drives the lead screw 5.1 to rotate, thereby causing the lead screw sleeve 5.2 to move linearly along the axis of the lead screw 5.1. The extraction unit 4 is mounted on the lead screw sleeve 5.2 and moves synchronously with the lead screw sleeve 5.2.

[0106] The driving component can be configured as a drive motor.

[0107] In this embodiment, the lead screw sleeve 5.2 extends outward to provide a top block mounting platform 8, and the top block mounting platform 8 provides a one-way stop for the one-way top block 6.

[0108] The two ends of the unidirectional top block 6 along the axis L are configured as abutment surface 6.1 and driving surface 6.2;

[0109] During the extraction process, the top block mounting stage 8 stops the drive surface 6.2, causing the abutment surface 6.1 to generate a thrust on the guide surface 311, which pushes the transmission component 300 to move away from the ejection gear 10;

[0110] During the reset stroke, the upper end of the stop bar 310 generates a thrust on the drive surface 6.2, causing the one-way top block 6 to rotate.

[0111] Meanwhile, in this embodiment, in order to realize the single-stroke driving function of the unidirectional top block 6, the two ends of the unidirectional top block 6 along the axis L are set as abutment surface 6.1 and driving surface 6.2. When the unidirectional top block 6 extends outward from the top block mounting platform 8, its abutment surface 6.1 will contact the guide surface 311 provided on the stop bar 310, while the driving surface 6.2 will form a contact fit with the end face of the top block mounting platform 8.

[0112] Based on the above configuration, when the abutment surface 6.1 applies a pushing force to the guide surface 311, according to Newton's third law, the guide surface 311 will simultaneously generate a reaction force of equal magnitude and opposite direction on the abutment surface 6.1. However, due to the rigid limiting effect of the top block mounting platform 8, this reaction force cannot be converted into a driving force for the unidirectional top block 6, thus ensuring the unidirectional driving characteristic.

[0113] When the extraction unit 4 enters the reset stroke, the one-way push block 6 is located on the other side of the transmission component 300, and its driving surface 6.2 contacts the stop bar 310 and generates a thrust. Since the side abutting the surface 6.1 is not limited at this time, the force exerted by the stop bar 310 on the driving surface 6.2 can be effectively converted into torque, driving the one-way push block 6 to rotate around its axis. This rotation causes the originally extended part of the one-way push block 6 to rotate, the interference between the stop bar 310 and the one-way push block 6 disappears, the one-way push block 6 can no longer drive the stop bar 310, and the stop bar 310 remains in the transmission position.

[0114] It should be noted that the one-way top block 6 is only pushed by a small angle. Therefore, after the reset stroke is completed, due to the gravity of the one-way top block 6, it is reset and rotated to the outside of the top block mounting platform 8.

[0115] As a preferred embodiment, the structure of the driving surface 6.2 has been optimized. Specifically, the portion of the driving surface 6.2 extending beyond the top block mounting platform 8 is designed as an inclined surface with a certain angle. This inclined surface design plays a crucial role in the reset stroke: when the stop bar 310 applies a force to the driving surface 6.2, since the direction of the force is perpendicular to the inclined surface, an effective tangential component force can be decomposed. This component force can generate the required rotational driving torque on the unidirectional top block 6, thereby causing the unidirectional top block 6 to rotate and eliminating the interference between it and the stop bar 310.

[0116] In this embodiment, the top block mounting platform 8 adopts an L-shaped structure design, which has a dual function. Its bottom surface is mainly used to constrain the rotation of the driving surface 6.2 of the unidirectional top block 6 to prevent unnecessary displacement; while the vertical surface is used to form a stable connection with the unidirectional top block 6 to ensure the rigidity and reliability of the overall structure.

[0117] In other embodiments, a torsion spring can be provided to hold the one-way top block 6 in position, so that after the stop bar 310 removes the force on the one-way top block 6, the torsion spring drives the one-way top block 6 to automatically reset.

[0118] In this embodiment, the push gear 10 drives the powder cup 100, that is, it moves the powder cup 100 downward relative to the powder pusher 200, so that the powder pusher 200 with the powder compact is exposed above the powder cup 100.

[0119] In this embodiment, the state switching of the powder cup 100 is achieved by driving the powder cup 100 to realize the relative movement between the powder cup 100 and the powder dispenser 200, as shown in the reference. Figure 10 As shown, the specific implementation is as follows: the extraction unit 4 includes a mounting frame 400 and a cup holder 500 for mounting the powder cup 100, the powder pusher 200 is fixed on the mounting frame 400, and the push-out gear 10 is rotatably mounted on the cup holder 500.

[0120] The ejector gear 10 is provided with ejector teeth 10.2 and transmission teeth 10.1 sequentially along the axial direction;

[0121] The transmission component 300 is configured as a rack, and the transmission teeth 10.1 mesh with the teeth of the transmission component 300 during the reset stroke;

[0122] The cup holder 500 is provided with a rack that meshes with the push-out teeth 10.2. When the push-out gear 10 rotates, it moves the cup holder 500 so that the powder cup 100 moves synchronously with the cup holder 500, thereby generating relative movement between it and the powder pusher seat 200.

[0123] The entire transmission system consists of meshing transmission teeth 10.1 and transmission components 300. When the linear transmission module 5 starts working and drives the extraction unit 4 to reset, the meshing relationship between the transmission teeth 10.1 and the transmission components 300 forces the transmission teeth 10.1 to rotate. This rotational motion is transmitted to the entire ejection gear 10, causing it to rotate synchronously. As the ejection gear 10 rotates, its ejection teeth 10.2 mesh with the rack on the cup holder 500, thereby driving the cup holder 500 to drive the powder cup 100 to produce a precise linear displacement relative to the ejection gear 10. Ultimately, this achieves the relative movement between the powder cup 100 and the powder pusher 200, allowing the powder pusher 200 to eject the formed powder cake from inside the powder cup 100, completing the transition from powder receiving mode to powder scraping mode.

[0124] Specific reference Figure 11 and Figure 12 As shown, in the coffee powder receiving mode, the pusher 200 is located deep inside the coffee cup 100, maintaining sufficient space from the opening of the coffee cup 100. This space is specifically designed to accommodate and compact the coffee powder. When the system switches to the scraper mode, the end face of the pusher 200 precisely moves to a position completely flush with the opening of the coffee cup 100. This precise positioning provides ideal working conditions for the subsequent operation of the scraper 9, allowing the scraper 9 to move smoothly along the surface of the coffee cup 100 and completely scrape off the formed coffee pouch. The transition between the two working modes is smooth and natural, and the precise coordination of each component ensures the stability and reliability of the entire coffee brewing process.

[0125] In this embodiment, the cup holder 500 is provided with a meshing groove 401 that can accommodate the rotation of the push-out tooth 10.2. Two racks are provided and are symmetrically arranged on both sides of the meshing groove 401. The two racks mesh and drive the push-out tooth 10.2 in sequence.

[0126] Specific reference Figure 10 As shown, the meshing groove 401 adopts a strip-shaped groove design, which extends along the movement trajectory of the ejector gear 10. Inside the strip-shaped groove, on both sides of the ejector gear 10's movement direction, parallel rack structures are respectively provided. This design allows the ejector teeth 10.2 to sequentially mesh with the racks on both sides: when the ejector teeth 10.2 mesh with one rack, it drives the cup holder 500 to move in one direction; when it meshes with the other rack, it drives the cup holder 500 to move in the opposite direction, thus achieving reciprocating motion of the cup holder 500 along a straight line.

[0127] Preferably, in order to achieve sequential transmission between the ejector gear 10 and the racks on both sides, in this embodiment, the ejector teeth 10.2 of the ejector gear 10 are set in an arc shape. Only the arc-shaped contour portion of the ejector teeth 10.2 has toothed structures, while the rest is a smooth surface. This special design allows the ejector teeth 10.2 to precisely mesh with the racks in the meshing groove 401. The meshing groove 401 contains two sets of racks with different functions: one set is an ejector rack 410, and the other is a retractor rack 420, located on opposite sides of the groove. When the ejector teeth 10.2 mesh with the ejector rack 410, due to the rotation of the ejector gear 10, the ejector teeth 10.2 move upward relative to the ejector rack 410, thereby driving the powder pusher 200 to move upward relative to the powder cup 100, ultimately achieving the function of ejecting the powder compact. When the ejector tooth 10.2 moves to the uppermost position of the ejector rack 410, the meshing relationship is automatically disengaged. At this time, the ejector tooth 10.2 enters the idling state, while the powder pusher 200 remains in the powder scraping position, completing one working stage.

[0128] As the ejector gear 10 continues to rotate, the ejector teeth 10.2 gradually rotate to the side where the return rack 420 is located. When the ejector teeth 10.2 and the return rack 420 mesh, their direction of motion changes: the ejector teeth 10.2 move downward relative to the return rack 420, thereby driving the powder pusher 200 to move downward relative to the powder cup 100. This movement process realizes the functional conversion of the powder cup 100 from the powder scraping mode to the powder receiving mode, preparing for the next working cycle. The entire transmission process is ingeniously designed, and the components fit together tightly, ensuring the stability and reliability of the equipment operation.

[0129] In this embodiment, the cup holder 500 is provided with a cup groove for accommodating the powder cup 100, and the reversing gear 20 is located on the back of the cup holder 500 to drive the entire extraction unit 4. To ensure the stability of the transmission structure, in this embodiment, the reversing gear 20 is limited and located on the cup holder 500. At the same time, the reversing gear 20 has a mounting shaft extending towards the cup holder 500, and the ejector gear 10 is rotatably sleeved on the mounting shaft. When the reversing gear 20 rotates under the action of the rotating gear 1.13, it drives the entire extraction unit 4 to rotate through the cup holder 500, achieving angle switching; while when the ejector gear 10 rotates under the action of the transmission component 300, it only rotates around the axis on the mounting shaft, and at the same time drives the cup holder 500 to move linearly through the transmission.

[0130] In this embodiment, when the powder cup 100 is in the powder scraping state, the scraper 9 scrapes off the powder cake that is exposed outside the opening of the powder cup 100. In other states, the scraper 9 does not contact the extraction unit 4. Specifically, the scraper 9 is also included. The scraper 9 is hinged on the base 1, and the scraper 9 uses the elastic member 13 to keep the blade 9.2 in the first avoidance position.

[0131] The linear transmission module 5 is provided with a scraper drive unit 12, which drives the drive end 9.1 of the scraper 9 to rotate from the first avoidance position past the brewing head 3 to the second avoidance position.

[0132] Specific reference Figure 13 As shown, a mounting base 11 is provided on the machine base 1, and the scraper 9 is hinged to the mounting base 11 via a rotating shaft. The scraper 9 adopts an asymmetrical design on both sides of the rotating shaft: one side is set as the drive end 9.1 for receiving external drive, and the other side is set as the blade 9.2 for actually performing scraping operations. Among them, the drive end 9.1 is cleverly arranged in the back area of ​​the machine base 1, while the blade 9.2 is located in the front working area of ​​the machine base 1. This layout ensures both the effective transmission of driving force and the working space of the blade 9.2.

[0133] The drive component of the scraper 9 is precisely mounted on the lead screw sleeve 5.2 of the linear transmission module 5. This mounting method ensures that the scraper drive unit 12 maintains a perfectly synchronized motion trajectory with the lead screw sleeve 5.2. In this embodiment, the blade 9.2 adopts an arc-shaped design that conforms to engineering mechanics. This special shape not only enhances the scraping effect but also effectively reduces working resistance.

[0134] In the initial operating state of the equipment, the scraper 9 is stably held in the first clearance position under the preload of the elastic element 13. When the linear drive module 5 starts working and drives the entire extraction unit 4 to move towards the brewing position, the scraper drive part 12 mounted on the lead screw sleeve 5.2 will gradually approach and eventually contact the drive end 9.1 of the scraper 9. This contact process generates a continuous driving force, forcing the scraper 9 to perform a precise rotational movement around the axis, thereby smoothly transitioning from the first clearance position to the second clearance position.

[0135] It should be noted that both the first and second avoidance positions can avoid the movement path of the extraction unit 4, ensuring that the brewing head 3 can enter the powder cup 100 without obstruction to complete the extraction operation.

[0136] After the extraction process is completed, the linear drive module will cause the powder cup 100 to begin retracting, and the lead screw sleeve 5.2 will also retract synchronously. As the scraper drive unit 12 separates from the drive end 9.1, the thrust applied to the drive end 9.1 gradually disappears, and the scraper 9 automatically resets to the first clearance position under the restoring force of the elastic element. During the entire reset process, the blade 9.2 of the scraper 9 will thoroughly scrape off the powder cake that has protruded outside the powder cup 100, ensuring the cleanliness of the working surface.

[0137] In the specific implementation of this embodiment, through a carefully designed mechanical structure layout, the first and second avoidance positions of the scraper 9 are both reasonably positioned to avoid the movement trajectory of the extraction unit 4. This ingenious spatial arrangement ensures that when the blade 9.2 of the scraper 9 needs to return from the second avoidance position to the first avoidance position, the planar area it traverses during its movement can completely cover the entire opening range of the coffee powder cup 100. Through this design, the blade 9.2 can effectively and thoroughly scrape away all coffee powder residue remaining above the coffee powder cup 100 during the reset process, thereby ensuring the cleanliness and consistency of the extraction process and avoiding any adverse effects that residual coffee powder might have on subsequent extraction operations.

[0138] Preferably, in a specific embodiment of this example, the driving end 9.1 is provided with a spiral actuation surface 9.11.

[0139] This helical actuating surface 9.11 has unique geometric features. When the scraper drive unit 12 contacts the actuating surface 9.11 and applies a holding force, it generates a thrust perpendicular to the tangential direction of the actuating surface 9.11. Due to the special structure of the helical surface, this thrust can be decomposed into two components: one component along the normal direction of the helical surface, and the other component along the tangential direction of the helical surface. It is this tangential component that is effectively converted into the rotational torque of the actuating surface 9.11, thereby driving the entire scraper 9 mechanism to rotate. This mechanical transmission process allows the scraper 9 to smoothly transition from the initial first clearance position to the second clearance position in the working state, completing the expected position transition function. The entire driving process ensures both the reliability of the transmission and the smoothness of the movement.

[0140] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A coffee brewing device with a grounds removal function, comprising an extraction unit (4) mounted on a base (1), wherein a linear transmission module (5) drives the extraction unit (4) to reciprocate along an axis (L) on the base (1), and has a powder receiving position and a brewing position; Its features are: The extraction unit (4) includes a coffee cup (100) with an extraction chamber (101) and a coffee pusher (200) disposed inside the coffee cup (100); the coffee pusher (200) moves along the axis of the coffee cup (100) within the extraction chamber (101), so that the coffee cup (100) has a coffee receiving mode for receiving coffee powder and a coffee scraping mode for pushing out the coffee puck; A transmission component (300) is provided on the base (1) along the axis (L), and an ejection gear (10) is provided on the extraction unit (4) and is connected to the transmission component (300). The transmission component (300) drives the ejection gear (10) to generate relative movement between the powder pusher (200) and the powder cup (100). The axis (L) is the central axis of the powder cup (100) in the extraction state; A clutch mechanism is provided between the transmission component (300) and the ejection gear (10), the clutch mechanism enabling the transmission component (300) to have a disengaged position and a transmission position relative to the ejection gear (10); When the extraction unit (4) is in the extraction stroke from the powder receiving position to the brewing position, the transmission component (300) is in the separation position and is separated from the ejection gear (10); When the extraction unit (4) is in the reset stroke from the brewing position to the powder receiving position, the transmission component (300) is in the transmission position and the ejection gear (10) is in the transmission connection state.

2. The coffee brewing device with a residue removal function according to claim 1, characterized in that: The clutch mechanism includes a one-way top block (6) disposed on the linear transmission module (5), and a stop bar (310) is provided on the transmission component (300); the stop bar (310) is located on the moving path of the one-way top block (6); The transmission component (300) is movably mounted on the base (1); During the extraction process, the one-way top block (6) moves synchronously with the linear transmission module (5), driving the stop bar (310) and driving the transmission component (300) from the transmission position to the separation position, and separating from the ejection gear (10); During the reset stroke, the stop bar (310) is not subjected to external force, and the transmission component (300) is reset to the transmission position under the action of the reset component, and is connected to the push-out gear (10) for transmission.

3. The coffee brewing device with a residue removal function according to claim 2, characterized in that: The linear transmission module (5) includes a lead screw (5.1) arranged along the axis (L) and a lead screw sleeve (5.2) that slides in cooperation with the lead screw (5.1); the one-way top block (6) is rotatably connected to the lead screw sleeve (5.2) and extends toward the transmission component (300); The lower end of the stop bar (310) is provided with an inclined guide surface (311).

4. The coffee brewing device with a residue removal function according to claim 3, characterized in that: The lead screw sleeve (5.2) extends outward to provide a top block mounting platform (8), which provides a one-way stop to the one-way top block (6). The two ends of the unidirectional top block (6) along the axis (L) are configured as abutment surface (6.1) and driving surface (6.2); During the brewing process, the top block mounting platform (8) stops the drive surface (6.2), causing the abutment surface (6.1) to generate a thrust on the guide surface (311), which pushes the transmission component (300) to move away from the ejection gear (10); During the reset stroke, the upper end of the stop bar (310) generates a thrust on the drive surface (6.2), causing the one-way top block (6) to rotate.

5. The coffee brewing device with a residue removal function according to claim 2, characterized in that: The extraction unit (4) includes a mounting frame (400) and a cup holder (500) for mounting the powder cup (100). The powder pusher (200) is fixed on the mounting frame (400), and the push gear (10) is rotatably mounted on the cup holder (500). The ejection gear (10) is provided with an ejection tooth (10.2) and a transmission tooth (10.1) in sequence along the axial direction; The transmission component (300) is configured as a rack, and the transmission teeth (10.1) mesh with the teeth of the transmission component (300) during the reset stroke; The cup holder (500) is provided with a rack that meshes with the push-out teeth (10.2). When the push-out gear (10) rotates, it moves the cup holder (500) so that the powder cup (100) moves synchronously with the cup holder (500), thereby generating relative movement between it and the powder pusher seat (200).

6. The coffee brewing device with a residue removal function according to claim 5, characterized in that: The cup holder (500) has a meshing groove (401) that can accommodate the rotation of the push-out tooth (10.2). There are two racks, which are symmetrically arranged on both sides of the meshing groove (401). The two racks mesh with the push-out tooth (10.2) in sequence for transmission.

7. The coffee brewing device with a residue removal function according to claim 1, characterized in that: The base (1) is provided with a transmission groove (1.1) arranged along the axis (L), and the transmission component (300) is located on the side of the transmission groove (1.1); The transmission groove (1.1) is provided with a rotating tooth (1.13) at the powder receiving position of the extraction unit (4); The extraction unit (4) is provided with a reversing gear (20) that cooperates with the rotating gear (1.13).

8. The coffee brewing device with a residue removal function according to claim 7, characterized in that: The rotating tooth (1.13) is located at the corner of the transmission groove (1.1); the reversing gear (20) is provided with arc-shaped teeth.

9. The coffee brewing device with a residue removal function according to claim 1, characterized in that: It also includes a scraper (9), which is hinged on the base (1) and the scraper (9) holds the blade (9.2) in a first clearance position by means of an elastic member (13); The linear transmission module (5) is provided with a scraper drive unit (12), which drives the drive end (9.1) of the scraper (9) to rotate from the first avoidance position past the brewing head (3) to the second avoidance position.

10. The coffee brewing device with a residue removal function according to claim 9, characterized in that... The driving end (9.1) is provided with a spiral actuation surface (9.11).

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