Coffee machine

Abstract

The invention relates to the technical field of beverage equipment, and discloses a coffee machine, comprising: a frame provided with a liquid inlet interface, one side of the frame being provided with a first driving assembly, the first driving assembly being provided with a liquid outlet interface; the extraction device is detachably connected with the rack, the extraction device comprises an extraction head assembly, a powder barrel and a liquid inlet connector, the powder barrel is provided with a liquid outlet connector, the first driving assembly is used for driving the powder barrel to move, the liquid inlet connector is connected with the liquid inlet connector in a sealed and inserted mode, and the liquid outlet connector is connected with the liquid outlet connector in a sealed and inserted mode. The whole extraction device can be detached from the rack and cleaned, the liquid inlet connector and the liquid inlet connector are connected in a sealed and inserted mode, the liquid outlet connector and the liquid outlet connector are connected in a sealed and inserted mode, and it can be ensured that after the extraction device is installed on the rack, normal liquid inlet and liquid outlet of the extraction device can be achieved.

Description

Technical Field

[0001] This invention relates to the field of beverage equipment technology, specifically to coffee machines. Background Technology

[0002] Fully automatic coffee machines can automatically control the entire coffee brewing process, including grinding, tamping, filling, brewing, and removing grounds. The extraction device of the coffee machine can collect, tamp, and extract the coffee grounds. In some fully automatic coffee machines, the extraction device is either completely non-removable or only the coffee hopper is removable. Coffee grounds that fall onto the extraction head and related transmission mechanisms cannot be disassembled for cleaning, and over time, this can lead to unpleasant odors. Summary of the Invention

[0003] In view of this, the present invention provides a coffee machine to solve the problem in the related art that the extraction device cannot be disassembled and cleaned.

[0004] This invention provides a coffee machine, comprising: The frame is provided with a liquid inlet, and a first drive assembly is provided on one side of the frame. The first drive assembly is provided with a liquid outlet. An extraction device is detachably connected to the frame. The extraction device includes an extraction head assembly, a powder cylinder, and a liquid inlet connector. The powder cylinder is provided with a liquid outlet connector. The first drive assembly is used to drive the powder cylinder to move. The liquid inlet connector is sealed and plugged into the liquid inlet interface, and the liquid outlet connector is sealed and plugged into the liquid outlet interface.

[0005] Beneficial effects: The extraction device is detachably connected to the frame, allowing the entire device to be removed for cleaning. By providing an inlet port on the frame and an outlet port on the first drive assembly, the extraction device includes an inlet connector and an outlet connector on the powder cylinder. The inlet connector and outlet port are sealed together, ensuring normal liquid intake and output after the device is installed on the frame. Furthermore, the outlet port is located on the first drive assembly, ensuring communication between the outlet connector and the outlet port during powder cylinder rotation.

[0006] In one optional embodiment, the liquid inlet connector is inserted into the liquid inlet port, and a first sealing ring is provided between the liquid inlet connector and the liquid inlet port.

[0007] Beneficial effects: The liquid inlet connector is inserted into the liquid inlet interface, and a first sealing ring is provided between the liquid inlet connector and the liquid inlet interface, which can ensure that liquid can flow into the liquid inlet connector through the liquid inlet interface.

[0008] In one alternative embodiment, the liquid inlet is provided with a first guide angle at one end facing the extraction device, and / or, the end of the liquid inlet connector is provided with a second guide angle.

[0009] Beneficial effects: By providing a first guide angle at the end of the inlet facing the extraction device, the inlet connector can be guided into the inlet interface. By providing a second guide angle at the end of the inlet connector, the inlet connector can be guided into the inlet interface.

[0010] In one alternative embodiment, along a direction away from the extraction device, the liquid inlet includes a first orifice and a second orifice, the diameter of the first orifice being larger than the diameter of the second orifice. The liquid inlet connector includes a small-diameter section and a large-diameter section, the small-diameter section being adapted to the diameter of the second orifice, the large-diameter section being adapted to the diameter of the first orifice, and a first sealing ring being disposed between the small-diameter section and the second orifice.

[0011] Beneficial effects: The liquid inlet interface includes a first hole section and a second hole section. The diameter of the first hole section is larger than that of the second hole section. The liquid inlet connector includes a small diameter section and a large diameter section. The small diameter section is adapted to the diameter of the second hole section, and the large diameter section is adapted to the diameter of the first hole section. The position of the liquid inlet connector in the liquid inlet interface can be positioned.

[0012] In one optional embodiment, the first drive assembly includes a first gear, the first gear has a first drive shaft at its center, the first drive shaft has a hollow channel, the liquid outlet includes the hollow channel, the powder cylinder has a first drive hole, the first drive shaft is inserted into the first drive hole, the liquid outlet connector is located at the center of the first drive hole, and the liquid outlet connector is sealed to the hollow channel.

[0013] Beneficial effects: The first gear has a first drive shaft at its center, and the first drive shaft has a hollow channel. The powder cylinder has a first drive hole. The first drive shaft is inserted into the first drive hole, which can connect the first drive assembly to the powder cylinder, thereby driving the powder cylinder to rotate. The first drive hole is provided with a hollow channel, and the liquid outlet interface includes a hollow channel. The liquid outlet connector is sealed to the hollow channel. Therefore, it can be achieved that the liquid outlet connector maintains a sealed connection with the liquid outlet interface during the process of the first drive assembly driving the powder cylinder to rotate.

[0014] In one optional embodiment, a second sealing ring is provided in the hollow channel, the first drive assembly further includes a first gear pressure plate, the first gear pressure plate is used to axially limit the first gear, and the liquid outlet further includes a liquid outlet portion provided on the first gear pressure plate, the liquid outlet portion being sealed and connected to the second sealing ring.

[0015] Beneficial effects: The first gear pressure plate is equipped with a liquid outlet. When the first gear pressure plate is fixed to the frame, the liquid outlet is sealed and connected to the second sealing ring. Therefore, the extracted liquid can flow out through the liquid outlet joint of the powder cylinder, and then flow out through the inside of the second sealing ring and the liquid outlet in sequence.

[0016] In one optional embodiment, the second sealing ring has a flange, the hollow channel has a stepped surface, the flange is supported on the stepped surface, the first gear pressure plate has an abutting rib, the abutting rib abuts against the flange, and the liquid outlet is inserted into the second sealing ring.

[0017] Beneficial effects: The second sealing ring has a flange, and the hollow channel has a stepped surface. The flange is supported on the stepped surface, so the assembly position of the second sealing ring can be positioned. The gear pressure plate has abutting ribs that abut against the flange. When the gear pressure plate is fixed, the abutting ribs abut against the flange, thereby fixing the position of the second sealing ring. The liquid outlet is inserted into the second sealing ring, which can ensure that the inside of the second sealing ring is connected to the liquid outlet.

[0018] In one alternative embodiment, the first drive shaft is provided with a first spline, and the first drive hole is provided with a second spline, wherein the first spline is adapted to the second spline.

[0019] Beneficial effects: The first drive shaft is provided with a first spline, and the first drive hole is provided with a second spline. The first spline and the second spline are compatible, which can realize the quick insertion of the first drive shaft and the first drive hole, and at the same time realize the transmission connection between the first drive shaft and the first drive hole, ensuring that the first drive assembly can drive the powder cylinder to rotate.

[0020] In one alternative implementation, the first spline has a first chamfer, and / or the second spline has a second chamfer.

[0021] Beneficial effect: The first spline has a first chamfer, and / or the second spline has a second chamfer, which can guide the first drive shaft to be inserted into the first drive hole.

[0022] In one optional embodiment, the extraction device includes a lower cover plate and an upper cover plate, the extraction head assembly and the powder cylinder are disposed between the lower cover plate and the upper cover plate, the upper cover plate is connected to the lower cover plate, and the liquid inlet connector is disposed on the lower cover plate.

[0023] Beneficial effects: The extraction head assembly and powder cylinder are located between the lower and upper cover plates, which are connected. Therefore, only the upper and lower cover plates are visible from the outside of the extraction device, resulting in a simple appearance. The extraction device is a single, integrated structure, facilitating its installation and disassembly. By placing the liquid inlet connector on the lower cover plate, the liquid inlet connector and the liquid inlet interface on the frame are sealed and plugged in when the extraction device is installed on the frame. Attached Figure Description

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

[0025] Figure 1 This is a schematic diagram of a coffee machine according to an embodiment of the present invention when the extraction device is separated from the frame; Figure 2 This is a cross-sectional view of a coffee machine according to an embodiment of the present invention after the extraction device is installed on the frame. Figure 1 ; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 for Figure 2 Enlarged view of point B in the middle; Figure 5 This is a schematic diagram of the first gear; Figure 6 This is a schematic diagram of a powder cartridge; Figure 7 This is a schematic diagram of a coffee machine according to the present invention after the extraction device is installed on the frame; Figure 8 This is a schematic diagram of a coffee machine of the present invention after the top cover has been removed. Figure 1 ; Figure 9 This is a schematic diagram of a coffee machine of the present invention after the top cover has been removed. Figure 2 ; Figure 10 for Figure 9 Enlarged view of point C in the middle; Figure 11 This is a cross-sectional view of a coffee machine according to an embodiment of the present invention after the extraction device is installed on the frame. Figure 2 ; Figure 12 This is a schematic diagram showing the side of the frame away from the extraction device; Figure 13 This is a schematic diagram of the extraction apparatus.

[0026] Explanation of reference numerals in the attached figures: 1. Frame; 101. Liquid inlet; 1011. First guide angle; 1012. First hole section; 1013. Second hole section; 1014. First connecting surface; 102. Second engaging structure; 103. Slot; 2. First drive assembly; 201. First gear; 202. First transmission shaft; 2021. Stepped surface; 2022. First spline; 203. Second sealing ring; 2031. Flanged edge; 204. First gear pressure plate; 2041. Liquid outlet section; 2042. Abutment rib; 301. Extraction head assembly; 3011. Second transmission hole; 30111. Third spline; 301111. Third chamfer; 3012. Transmission structure; 3013. Extraction head; 302. Powder cylinder; 3020. Rotating shaft; 3021. Liquid outlet connector; 3022. 1. Transmission hole; 30221. Second spline; 302211. Second chamfer; 303. Liquid inlet connector; 3031. Second guide angle; 3032. Small diameter section; 3033. Large diameter section; 3034. Second connecting surface; 304. First sealing ring; 305. Lower cover plate; 306. Upper cover plate; 307. Water pipe; 308. First engaging structure; 3081. Plate body; 3082. Buckle; 30821. Guide surface; 30822. Engaging surface; 3083. Rotating shaft; 3084. Elastic element; 3085. Pressing part; 309. Powder dropping funnel; 310. Top rod; 311. Roller; 312. First track; 313. Powder scraping structure; 4. Liquid inlet pipe; 5. Liquid outlet pipe; 7. Second drive assembly; 701. Second transmission shaft; 7011. Fourth spline. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," 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 the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] Furthermore, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0031] Fully automatic coffee machines can automatically control the entire coffee brewing process, including grinding, tamping, filling, brewing, and removing grounds. The extraction device of the coffee machine can collect, tamp, and extract the coffee grounds. In some fully automatic coffee machines, the extraction device is either completely non-removable or only the coffee hopper is removable. Coffee grounds that fall onto the extraction head and related transmission mechanisms cannot be disassembled for cleaning, and over time, this can lead to unpleasant odors.

[0032] The extraction device has a complex structure, involving the rotation and positioning detection of the powder barrel, a reliable powder dropping structure, the up and down sliding of the extraction head, the sealed connection of the inlet and outlet water pipes, the interconnection of the transmission devices, and the mechanism for automatically cleaning the powder cake. Therefore, existing technologies usually set the extraction device to be non-removable or only removable from the powder barrel.

[0033] The following is combined with Figures 1 to 13 The following describes embodiments of the present invention.

[0034] According to an embodiment of the present invention, in one aspect, a coffee machine is provided, including a frame 1 and an extraction device.

[0035] The frame 1 is provided with a liquid inlet 101, and a first drive assembly 2 is provided on one side of the frame 1. The first drive assembly 2 is provided with a liquid outlet 1. The extraction device is detachably connected to the frame 1. The extraction device includes an extraction head assembly 301, a powder cylinder 302 and a liquid inlet connector 303. The powder cylinder 302 is provided with a liquid outlet connector 3021. The first drive assembly 2 is used to drive the powder cylinder 302 to move. The liquid inlet connector 303 is sealed and plugged into the liquid inlet 101, and the liquid outlet connector 3021 is sealed and plugged into the liquid outlet 101.

[0036] In this embodiment, the extraction device is detachably connected to the frame 1, allowing the entire extraction device to be removed from the frame 1 for cleaning. By providing an inlet port 101 on the frame 1 and an outlet port on the first drive assembly 2, the extraction device includes an inlet connector 303 and an outlet connector 3021 on the powder cylinder 302. The inlet connector 303 is sealed to the inlet port 101, and the outlet connector 3021 is sealed to the outlet port. This ensures that the extraction device can normally receive and discharge liquid after being installed on the frame 1. Furthermore, by placing the outlet port on the first drive assembly 2, the first drive assembly 2 ensures communication between the outlet connector 3021 and the outlet port during the rotation of the powder cylinder 302 assembly.

[0037] In one embodiment, the liquid inlet connector 303 is inserted into the liquid inlet interface 101, and a first sealing ring 304 is provided between the liquid inlet connector 303 and the liquid inlet interface 101.

[0038] In this embodiment, the liquid inlet connector 303 is inserted into the liquid inlet interface 101, and a first sealing ring 304 is provided between the liquid inlet connector 303 and the liquid inlet interface 101 to ensure that liquid can flow into the liquid inlet connector 303 through the liquid inlet interface 101.

[0039] In one specific embodiment, the liquid inlet 101 is connected to the liquid inlet pipe 4, and the liquid can enter the liquid inlet 101 through the liquid inlet pipe 4, and then enter the extraction device through the liquid inlet connector 303.

[0040] In one specific embodiment, the liquid inlet connector 303 is provided with an installation groove, and the first sealing ring 304 is provided in the installation groove and protrudes from the outer surface of the liquid inlet connector 303.

[0041] In one embodiment, such as Figure 3 As shown, the liquid inlet 101 is provided with a first guide angle 1011 at one end facing the extraction device, and / or the liquid inlet connector 303 is provided with a second guide angle 3031 at the end.

[0042] In this embodiment, by providing a first guide angle 1011 at the end of the liquid inlet 101 facing the extraction device, the liquid inlet connector 303 can be guided to be inserted into the liquid inlet 101. By providing a second guide angle 3031 at the end of the liquid inlet connector 303, the liquid inlet connector 303 can be guided to be inserted into the liquid inlet 101.

[0043] In one embodiment, along the direction away from the extraction device, the liquid inlet 101 includes a first orifice 1012 and a second orifice 1013, the orifice diameter of the first orifice 1012 being larger than the orifice diameter of the second orifice 1013. The liquid inlet connector 303 includes a small diameter section 3032 and a large diameter section 3033, the small diameter section 3032 being adapted to the orifice diameter of the second orifice 1013, and the large diameter section 3033 being adapted to the orifice diameter of the first orifice 1012. A first sealing ring 304 is disposed between the small diameter section 3032 and the second orifice 1013.

[0044] In this embodiment, the liquid inlet interface 101 includes a first hole section 1012 and a second hole section 1013. The diameter of the first hole section 1012 is larger than the diameter of the second hole section 1013. The liquid inlet connector 303 includes a small diameter section 3032 and a large diameter section 3033. The small diameter section 3032 is adapted to the diameter of the second hole section 1013, and the large diameter section 3033 is adapted to the diameter of the first hole section 1012. The position of the liquid inlet connector 303 in the liquid inlet interface 101 can be positioned.

[0045] Specifically in one embodiment, such as Figure 3 As shown, a first connecting surface 1014 is formed between the first hole section 1012 and the second hole section 1013, and a second connecting surface 3034 is formed between the small diameter section 3032 and the large diameter section 3033. When the first connecting surface 1014 and the second connecting surface 3034 come into contact, the liquid inlet connector 303 cannot continue to move into the liquid inlet interface 101.

[0046] In one embodiment, such as Figure 4 As shown, the first drive assembly 2 includes a first gear 201, a first drive shaft 202 is provided at the center of the first gear 201, the first drive shaft 202 has a hollow channel, the liquid outlet includes a hollow channel, the powder cylinder 302 is provided with a first drive hole 3022, the first drive shaft 202 is inserted into the first drive hole 3022, the liquid outlet connector 3021 is provided at the center of the first drive hole 3022, and the liquid outlet connector 3021 is sealed and connected to the hollow channel.

[0047] In this embodiment, a first drive shaft 202 is provided at the center of the first gear 201. The first drive shaft 202 has a hollow channel. The powder cylinder 302 is provided with a first drive hole 3022. The first drive shaft 202 is inserted into the first drive hole 3022, which can connect the first drive assembly 2 to the powder cylinder 302, thereby driving the powder cylinder 302 to rotate. The first drive hole 3022 is provided with a hollow channel. The liquid outlet includes a hollow channel. The liquid outlet connector 3021 is sealed and connected to the hollow channel. Therefore, it can be achieved that the liquid outlet connector 3021 maintains a sealed connection with the liquid outlet while the first drive assembly 2 drives the powder cylinder 302 to rotate.

[0048] In one embodiment, a second sealing ring 203 is provided in the hollow channel, and the first drive assembly 2 further includes a first gear pressure plate 204, which is used to axially limit the first gear 201. The liquid outlet also includes a liquid outlet portion 2041 provided on the first gear pressure plate 204, which is sealed to the second sealing ring 203.

[0049] In this embodiment, the first gear plate 204 is provided with a liquid outlet 2041. When the first gear plate 204 is fixed to the frame 1, the liquid outlet 2041 is sealed to the second sealing ring 203. Therefore, the extracted liquid can flow out through the liquid outlet joint 3021 of the powder cylinder 302, and then flow out through the inside of the second sealing ring 203 and the liquid outlet 2041 in sequence.

[0050] In one specific embodiment, the first gear pressure plate 204 is fixedly connected to the frame 1.

[0051] In one specific embodiment, the liquid outlet 2041 is connected to the liquid outlet pipe 5. The extracted liquid can flow out through the liquid outlet connector 3021 of the powder cylinder 302, and then pass through the inside of the second sealing ring 203 and the liquid outlet 2041 in sequence before flowing out through the liquid outlet pipe 5.

[0052] Specifically, the outer wall of the second sealing ring 203 is tightly fitted with the inner wall of the hollow channel, and the liquid outlet connector 3021 is inserted into the second sealing ring 203 and is interference-fitted with the second sealing ring 203.

[0053] In one embodiment, the second sealing ring 203 is provided with a flange 2031, the hollow channel is provided with a stepped surface 2021, the flange 2031 is supported on the stepped surface 2021, the first gear pressure plate 204 is provided with an abutting rib 2042, the abutting rib 2042 abuts against the flange 2031, and the liquid outlet 2041 is inserted into the second sealing ring 203.

[0054] In this embodiment, the second sealing ring 203 is provided with a flange 2031, and the hollow channel is provided with a stepped surface 2021. The flange 2031 is supported on the stepped surface 2021, so the assembly position of the second sealing ring 203 can be positioned. The gear pressure plate is provided with an abutting rib 2042, which abuts against the flange 2031. When the gear pressure plate is fixed, the abutting rib 2042 abuts against the flange 2031, thereby fixing the position of the second sealing ring 203. The liquid outlet 2041 is inserted into the second sealing ring 203, which can ensure that the interior of the second sealing ring 203 is in communication with the liquid outlet 2041.

[0055] In one embodiment, such as Figure 5 and Figure 6As shown, the first drive shaft 202 is provided with a first spline 2022, and the first drive hole 3022 is provided with a second spline 30221. The first spline 2022 and the second spline 30221 are adapted to each other.

[0056] In this embodiment, the first drive shaft 202 is provided with a first spline 2022, and the first drive hole 3022 is provided with a second spline 30221. The first spline 2022 and the second spline 30221 are adapted to each other, which can realize the quick insertion of the first drive shaft 202 and the first drive hole 3022, and at the same time realize the transmission connection between the first drive shaft 202 and the first drive hole 3022, ensuring that the first drive assembly 2 can drive the powder cylinder 302 to rotate.

[0057] In one specific embodiment, the first drive component 2 further includes a first motor.

[0058] In one embodiment, the first spline 2022 is provided with a first chamfer, and / or the second spline 30221 is provided with a second chamfer 302211.

[0059] In this embodiment, the first spline 2022 is provided with a first chamfer, and / or the second spline 30221 is provided with a second chamfer 302211, which can guide the first drive shaft 202 to be inserted into the first drive hole 3022.

[0060] In one embodiment, such as Figure 7 As shown, the extraction device includes a lower cover plate 305 and an upper cover plate 306. The extraction head assembly 301 and the powder cylinder 302 are located between the lower cover plate 305 and the upper cover plate 306. The upper cover plate 306 is connected to the lower cover plate 305. The liquid inlet connector 303 is located on the lower cover plate 305.

[0061] In this embodiment, the extraction head assembly 301 and the powder cylinder 302 are located between the lower cover plate 305 and the upper cover plate 306. The upper cover plate 306 is connected to the lower cover plate 305. Therefore, only the upper cover plate 306 and the lower cover plate 305 are visible from the outside of the extraction device, resulting in a simple appearance. The extraction device is a single integrated structure, facilitating its installation and disassembly. By placing the liquid inlet connector 303 on the lower cover plate 305, when the extraction device is installed on the frame 1, the liquid inlet connector 303 is sealed and plugged into the liquid inlet interface 101 on the frame 1.

[0062] In one specific embodiment, the powder cylinder 302 is provided with a rotating shaft 3020, which is rotatably engaged with the upper cover plate 306.

[0063] In one embodiment, a second drive assembly 7 is provided on the side of the frame 1 away from the extraction device, the second drive assembly 7 being used to drive the extraction head assembly 301 to move.

[0064] Specifically, the second drive assembly 7 is provided with a second drive shaft 701, and the extraction head assembly 301 is provided with a second drive hole 3011, and the second drive shaft 701 is inserted into the second drive hole 3011.

[0065] In one embodiment, combined Figure 1 and Figure 13 The second transmission hole 3011 is provided with a third spline 30111, and the second transmission shaft 701 is provided with a fourth spline 7011 that is adapted to the third spline 30111. The second transmission hole 3011 being provided with a third spline 30111 and the second transmission shaft 701 being provided with a fourth spline 7011 that is adapted to the third spline 30111 can achieve both quick insertion and transmission connection between the second transmission hole 3011 and the second transmission shaft 701, ensuring that the second drive assembly 7 can drive the extraction head assembly 301 to move.

[0066] In one embodiment, the third spline 30111 has a third chamfer 301111, and / or the fourth spline 7011 has a fourth chamfer, which can guide the second drive shaft 701 to be inserted into the second drive hole 3011.

[0067] In one specific embodiment, the extraction head assembly 301 includes an extraction head 3013 and a transmission structure 3012. The transmission structure 3012 is located in the second transmission hole 3011 and can convert the rotation of the second drive assembly 7 into the movement of the extraction head 3013.

[0068] In one specific embodiment, the transmission structure 3012 includes a crank and a slider. The crank is provided with a second transmission hole 3011. The crank is hinged to the slider, and the slider is connected to the extraction head 3013.

[0069] In one specific embodiment, the water inlet connector is connected to the extraction head 3013 via a water pipe 307.

[0070] In one embodiment, the extraction device further includes a powder discharge funnel 309, which is limited between the upper cover plate 306 and the lower cover plate 305 by a limiting structure, so as to facilitate the positioning and installation of the powder discharge funnel 309.

[0071] In one embodiment, such as Figures 7 to 11 As shown, the extraction device is provided with a first engaging structure 308, and the frame 1 is provided with a second engaging structure 102. When the second engaging structure 102 engages with the first engaging structure 308, the first driving component 2 is connected to the powder cylinder 302, and the second driving component 7 is connected to the extraction head component 301.

[0072] In this embodiment, a first engaging structure 308 is provided in the extraction device, and a second engaging structure 102 is provided in the frame 1. The second engaging structure 102 is adapted to engage with the first engaging structure 308. When the second engaging structure 102 engages with the first engaging structure 308, the extraction device can be fixed on the frame 1. When the extraction device needs to be disassembled for cleaning, the engagement between the first engaging structure 308 and the second engaging structure 102 can be released, and then the extraction device can be easily removed from the frame 1. When the first engaging structure 308 engages with the second engaging structure 102, the first driving component 2 is connected to the powder cylinder 302, and the second driving component 7 is connected to the extraction head assembly 301. Therefore, it can be ensured that the first driving component 2 can drive the powder cylinder 302 to rotate, and the second driving component 7 can drive the extraction head assembly 301 to move, ensuring that the extraction device can work normally after being installed on the frame 1.

[0073] In one embodiment, such as Figures 9 to 11 As shown, the first engaging structure 308 includes a plate 3081 and a buckle 3082 disposed at the end of the plate 3081. The plate 3081 is rotatably connected to the extraction device via a rotating shaft 3083, and an elastic element 3084 is provided between the plate 3081 and the extraction device. The elastic force of the elastic element 3084 can keep the buckle 3082 engaged with the second engaging structure 102.

[0074] In this embodiment, the first engaging structure 308 includes a plate 3081 and a latch 3082 located at the end of the plate 3081. The plate 3081 is rotatably connected to the extraction device via a rotating shaft 3083, and an elastic element 3084 is provided between the plate 3081 and the extraction device. The elastic force of the elastic element 3084 can keep the latch 3082 engaged with the second engaging structure 102, thus ensuring a stable connection between the first engaging structure 308 and the second engaging structure 102, thereby stably mounting the extraction device on the frame 1. When the extraction device needs to be disassembled for cleaning, by rotating the plate 3081, the plate 3081 rotates around the rotating shaft 3020, which can disengage the latch 3082 from the second engaging structure 102, and then the extraction device can be easily removed from the frame 1. By rotatably connecting the plate 3081 and the extraction device via the rotating shaft 3083, and by providing an elastic element 3084 between the plate 3081 and the extraction device, it is easier to disassemble the extraction device.

[0075] In one specific embodiment, the rotating shaft 3083 is disposed on the plate 3081, the extraction device is provided with a limiting groove, and the rotating shaft 3083 is rotatably disposed in the limiting groove.

[0076] In one specific embodiment, the elastic element 3084 can be a compression spring, a torsion spring, or other elastic element. In this embodiment, the elastic element 3084 is preferably a compression spring.

[0077] In an alternative embodiment, the second engaging structure 102 can be an elastic buckle that engages with the first engaging structure 308 of the extraction device. When the extraction device needs to be disassembled for cleaning, the second engaging structure 102 is moved to disengage from the first engaging structure 308, and then the extraction device can be easily removed from the frame 1.

[0078] In one embodiment, such as Figure 11 As shown, the first engaging structure 308 also includes a pressing part 3085 located at the end of the plate 3081 away from the buckle 3082.

[0079] In this embodiment, by providing a pressing part 3085, when the extraction device needs to be disassembled for cleaning, pressing the pressing part 3085 with a finger causes the plate 3081 to rotate around the rotating shaft 3020, causing the latch 3082 to disengage from the second engaging structure 102, after which the extraction device can be easily removed from the frame 1. The pressing part 3085 facilitates the user in releasing the connection between the first engaging structure 308 and the second engaging structure 102.

[0080] In one specific embodiment, the pressing part 3085 is provided with friction protrusions.

[0081] In one specific embodiment, the extraction device is provided with a limiting part. When the pressing part 3085 abuts against the limiting part, the buckle 3082 just disengages from the second engaging structure 102.

[0082] In one embodiment, the buckle 3082 is provided with a guide surface 30821 and a fastening surface 30822. When installing the extraction device, as follows: Figure 6 and Figure 7 The second engaging structure 102 contacts the guide surface 30821 and drives the buckle 3082 to rotate away from the second engaging structure 102. When the guide surface 30821 leaves the second engaging structure 102, the elastic force of the elastic element 3084 causes the engaging surface 30822 to engage with the second engaging structure 102.

[0083] In this embodiment, by providing a guide surface 30821 to the buckle 3082, when the extraction device is installed, the first engaging structure 308 moves toward the second engaging structure 102. The second engaging structure 102 first contacts the guide surface 30821. As the guide surface 30821 moves along the second engaging structure 102, the second engaging structure 102 drives the buckle 3082 to rotate away from the second engaging structure 102. During the rotation of the buckle 3082, the elastic force of the elastic element 3084 increases. When the guide surface 30821 leaves the second engaging structure 102, the elastic force of the elastic element 3084 causes the engaging surface 30822 to engage with the second engaging structure 102, thereby achieving stable installation of the extraction device on the frame 1.

[0084] In one specific embodiment, the guide surface 30821 is an inclined surface, and the cross-sectional area of ​​the buckle 3082 gradually increases along the direction close to the pressing part 3085.

[0085] In one embodiment, the frame 1 is provided with a slot 103, which is adapted for the buckle 3082 to pass through, and a second engaging structure 102 is provided on one side of the slot 103.

[0086] In this embodiment, when installing the extraction device, the buckle 3082 is aligned with the slot 103, and then the extraction device is pressed to allow the buckle 3082 to pass through the slot 103. During the process of the buckle 3082 passing through the slot 103, the second engaging structure 102 first contacts the guide surface 30821. As the guide surface 30821 moves along the second engaging structure 102, the second engaging structure 102 drives the buckle 3082 to rotate away from the second engaging structure 102. During the rotation of the buckle 3082, the elastic force of the elastic element 3084 increases. When the guide surface 30821 leaves the second engaging structure 102, the buckle 3082 passes through the slot 103, and the elastic force of the elastic element 3084 causes the engaging surface 30822 to engage with the second engaging structure 102, thereby achieving stable installation of the extraction device on the frame 1.

[0087] In one embodiment, the first engaging structure 308 is provided on both sides and one end of the extraction device along its length.

[0088] In this embodiment, the first engaging structure 308 is provided on both sides and one end of the extraction device along its length, which can ensure that the extraction device is stably installed on the frame 1.

[0089] Specifically in one embodiment, such as Figure 7 As shown, the first engaging structure 308 is located on the left and right sides and the bottom side of the extraction device, and the first engaging structure 308 on the left and right sides is close to the top side of the extraction device.

[0090] In one embodiment, the powder cylinder 302 is connected to a top rod 310, the first end of the top rod 310 is located inside the powder cylinder, the second end of the top rod 310 is provided with a roller 311, the upper cover plate 306 and / or the lower cover plate 305 are provided with a first track 312, and the roller 311 rolls along the first track 312.

[0091] In this embodiment, a first track 312 is provided on the upper cover plate 306 and / or the lower cover plate 305, and a roller 311 is provided on the second end of the top rod 310. The roller 311 rolls along the first track 312, thereby enabling the top rod 310 to rotate smoothly when the powder tank rotates. By integrating the first track 312 onto the lower cover plate 305 and / or the upper cover plate 306, a small volume of the extraction device is ensured.

[0092] In one specific embodiment, the first track 312 is disposed on the lower cover plate 305.

[0093] In one specific embodiment, the first track 312 includes a first track segment, a second track segment, and a third track segment. The first track segment is an arc segment centered on the rotation center of the coffee hopper, with a radius of R1. After the coffee hopper finishes receiving coffee from the coffee hopper 309, the first drive assembly 2 drives the coffee hopper to rotate, and the roller 311 rolls along the first track segment. During this process, there is no relative movement between the push rod 310 and the coffee hopper. When the roller 311 moves to the position where the first track segment connects with the second track segment, the axis of the coffee hopper is collinear with the direction of movement of the extraction head 3013. Then, driven by the second drive assembly 7, the extraction head 3013 presses into the coffee hopper to complete coffee extraction. Afterward, the first drive assembly 2 drives the coffee hopper to rotate, and the roller 311 rolls along the second track segment. The distance between the second track segment and the rotation center of the coffee hopper gradually decreases, so the push rod 310 moves relative to the coffee hopper, pushing the extracted coffee powder out of the coffee hopper to cooperate with the scraper structure 313 to complete waste cleaning. When the filter moves to the opening position of the powder bucket, the roller 311 is located at the junction of the second and third track sections. Then the powder bucket continues to rotate, and the roller 311 rolls along the third track section. The third track section is an arc segment with the rotation center of the powder bucket as the center. The radius of the third track section is R2, which can avoid interference between the filter and the powder scraping structure 313.

[0094] Although embodiments of the invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the invention, and such modifications and variations all fall within the scope defined by this application.

Claims

1. A coffee machine, characterized in that, include: The frame (1) is provided with a liquid inlet (101), and a first drive assembly (2) is provided on one side of the frame (1). The first drive assembly (2) is provided with a liquid outlet. An extraction device is detachably connected to the frame (1). The extraction device includes an extraction head assembly (301), a powder cylinder (302), and a liquid inlet connector (303). The powder cylinder (302) is provided with a liquid outlet connector (3021). The first drive assembly (2) is used to drive the powder cylinder (302) to move. The liquid inlet connector (303) is sealed and plugged into the liquid inlet interface (101). The liquid outlet connector (3021) is sealed and plugged into the liquid outlet interface.

2. The coffee machine according to claim 1, characterized in that, The liquid inlet connector (303) is inserted into the liquid inlet interface (101), and a first sealing ring (304) is provided between the liquid inlet connector (303) and the liquid inlet interface (101).

3. The coffee machine according to claim 2, characterized in that, The liquid inlet (101) is provided with a first guide angle (1011) at one end facing the extraction device, and / or the end of the liquid inlet connector (303) is provided with a second guide angle (3031).

4. The coffee machine according to claim 2, characterized in that, Along the direction away from the extraction device, the liquid inlet (101) includes a first orifice (1012) and a second orifice (1013), the diameter of the first orifice (1012) being larger than the diameter of the second orifice (1013). The liquid inlet connector (303) includes a small diameter section (3032) and a large diameter section (3033), the small diameter section (3032) being adapted to the diameter of the second orifice (1013), and the large diameter section (3033) being adapted to the diameter of the first orifice (1012). The first sealing ring (304) is disposed between the small diameter section (3032) and the second orifice (1013).

5. The coffee machine according to any one of claims 1 to 4, characterized in that, The first drive assembly (2) includes a first gear (201), and a first drive shaft (202) is provided at the center of the first gear (201). The first drive shaft (202) has a hollow channel. The liquid outlet includes the hollow channel. The powder cylinder (302) is provided with a first drive hole (3022). The first drive shaft (202) is inserted into the first drive hole (3022). The liquid outlet connector (3021) is located at the center of the first drive hole (3022). The liquid outlet connector (3021) is sealed and connected to the hollow channel.

6. The coffee machine according to claim 5, characterized in that, The hollow channel is provided with a second sealing ring (203), and the first drive assembly (2) also includes a first gear pressure plate (204). The first gear pressure plate (204) is used to limit the axial movement of the first gear (201). The liquid outlet also includes a liquid outlet part (2041) provided on the first gear pressure plate (204), and the liquid outlet part (2041) is sealed to the second sealing ring (203).

7. The coffee machine according to claim 6, characterized in that, The second sealing ring (203) is provided with a flange (2031), the hollow channel is provided with a stepped surface (2021), the flange (2031) is supported on the stepped surface (2021), the first gear pressure plate (204) is provided with an abutting rib (2042), the abutting rib (2042) abuts against the flange (2031), and the liquid outlet (2041) is inserted into the second sealing ring (203).

8. The coffee machine according to claim 5, characterized in that, The first drive shaft (202) is provided with a first spline (2022), and the first drive hole (3022) is provided with a second spline (30221). The first spline (2022) and the second spline (30221) are adapted to each other.

9. The coffee machine according to claim 8, characterized in that, The first spline (2022) has a first chamfer, and / or the second spline (30221) has a second chamfer (302211).

10. The coffee machine according to any one of claims 1 to 4, 6 to 9, characterized in that, The extraction device includes a lower cover plate (305) and an upper cover plate (306). The extraction head assembly (301) and the powder cylinder (302) are located between the lower cover plate (305) and the upper cover plate (306). The upper cover plate (306) is connected to the lower cover plate (305). The liquid inlet connector (303) is located on the lower cover plate (305).

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