Coffee maker

Abstract

The present application relates to the technical field of coffee machine, and particularly relates to a coffee machine. The coffee machine comprises a mounting plate, a powder sealing sheet, a shower and a driving member. The mounting plate is arranged in the shell of the coffee machine, and the mounting plate is provided with a water outlet and a powder outlet. The powder sealing sheet is slidingly arranged on the bottom surface of the mounting plate, and has a grinding position for opening the powder outlet and an extraction position for sealing the powder outlet. The shower is provided with a plurality of water injection holes, and the shower is detachably and rotatably arranged on the bottom surface of the mounting plate, and has an avoiding position for being disconnected with the water outlet and an extraction position for being communicated with the water outlet. The driving member is arranged on the mounting plate, and the driving member is in transmission connection with the powder sealing sheet and the shower respectively, so as to synchronously drive the powder sealing sheet and the shower to move towards each other and to the extraction position together, and the shower is located directly below the powder sealing sheet. Alternatively, the driving member drives the powder sealing sheet and the shower to move away from each other, so as to drive the powder sealing sheet to move to the grinding position and the shower to move to the avoiding position. The coffee machine shortens the stroke space of the shower and the powder sealing sheet, and the shower can be cleaned in a detachable manner.

Description

Technical Field

[0001] This invention relates to the field of coffee machine technology, and more particularly to a coffee machine. Background Technology

[0002] An American coffee maker is a device used to brew coffee. It works by spraying hot water or steam onto coffee grounds to extract the coffee.

[0003] Existing American-style coffee machines incorporate a showerhead with spray nozzles to ensure hot water evenly and completely soaks the coffee grounds. The showerhead and the coffee grounds outlet sealing plate are integrated. When grinding coffee beans, the showerhead and sealing plate move synchronously and in the same direction to open the outlet. When brewing coffee, the showerhead and sealing plate return to their original positions to close the outlet. At this point, the showerhead is positioned directly above the filter screen of the coffee basket assembly, spraying hot water onto the coffee grounds to extract the coffee. However, due to the relatively large size of the showerhead, a long travel distance is required for it to move together with the sealing plate to open the outlet, resulting in the showerhead and sealing plate occupying a significant amount of internal space, further increasing the overall size of the coffee machine. Additionally, during brewing, the hot water spraying onto the coffee grounds can easily cause grounds to fly up or splash, making them adhere to the showerhead. This can lead to an unpleasant odor developing on the showerhead over long-term use, affecting the coffee brewing and extraction results. Summary of the Invention

[0004] The purpose of this invention is to provide a coffee machine that shortens the travel space between the spray nozzle and the sealing powder plate, reduces the overall size of the coffee machine, enables the spray nozzle to be detached and cleaned, and improves the coffee extraction and brewing effect.

[0005] To achieve this objective, the technical solution adopted by the present invention is as follows:

[0006] Coffee machines, including:

[0007] An installation plate is installed inside the outer casing of the coffee machine, and the installation plate has a water outlet and a powder outlet;

[0008] A powder sealing sheet is slidably disposed on the bottom surface of the mounting plate and has a grinding position for opening the powder outlet and an extraction position for sealing the powder outlet;

[0009] The shower head has multiple spray holes. The shower head is detachably rotatably mounted on the bottom surface of the mounting plate and has a clearance position that is disconnected from the water outlet and an extraction position that is connected to the water outlet.

[0010] A driving component is disposed on the mounting plate. The driving component is connected to the sealing powder sheet and the shower head respectively to drive the sealing powder sheet and the shower head to move closer to each other and move together to the extraction position, with the shower head located directly below the sealing powder sheet; or, drive the sealing powder sheet and the shower head to move away from each other, so that the sealing powder sheet moves to the grinding position and the shower head moves to the avoidance position.

[0011] As a preferred embodiment, a rotating shaft is fixedly provided on the bottom surface of the mounting plate; the shower head is detachably sleeved on the rotating shaft and can rotate around the rotating shaft between the avoidance position and the extraction position.

[0012] As a preferred embodiment, the shower head includes:

[0013] The bottom shell includes a main shell and a support arm. The main shell has an inlet that can communicate with the outlet. The support arm extends outward from the main shell and is rotatably sleeved on the rotating shaft. The driving component is connected to the support arm in a transmission manner.

[0014] The face cover is snapped onto the main housing, and the face cover has multiple water spray holes.

[0015] As a preferred embodiment, the output end of the drive component is connected to a first connecting rod, one of the first connecting rod and the support arm is provided with a first sliding hole, and the other of the first connecting rod and the support arm is provided with a first guide post, which slides through the first sliding hole.

[0016] As a preferred embodiment, one of the main housing and the face cover is provided with a latching arm, and the other of the main housing and the face cover is provided with a latching groove, and the latching arm is engaged in the latching groove.

[0017] As a preferred embodiment, the inner bottom surface of the cover is provided with a flow-guiding ring in the circumferential direction, the circumferential sidewall of the cover and the flow-guiding ring form a flow-guiding channel, the water outlet can communicate with the flow-guiding channel, at least part of the water spray holes are located inside the flow-guiding ring, the flow-guiding ring is provided with multiple cuts at intervals in the circumferential direction, and the flow-guiding channel is connected to the interior of the flow-guiding ring through the multiple cuts.

[0018] As a preferred embodiment, the inner bottom surface of the cover is further provided with a flow-dividing rib, and a flow-dividing rib is provided circumferentially on the outer edge of a portion of the water spray hole within the flow-guiding ring.

[0019] As a preferred embodiment, the inner bottom surface of the cover is a concave arc surface.

[0020] As a preferred embodiment, the output end of the drive component is connected to a second connecting rod, one of the second connecting rod and the sealing powder sheet is provided with a second sliding hole, and the other of the second connecting rod and the sealing powder sheet is provided with a second guide post, which slides through the second sliding hole.

[0021] As a preferred embodiment, two guide plates are arranged opposite each other on the bottom surface of the mounting plate, and the guide plates and the mounting plate form a slide. The two ends of the slide extend to the grinding position and the extraction position, respectively, and the sealing powder sheet is slidably disposed in the two slides.

[0022] The beneficial effects of this invention are as follows:

[0023] The coffee machine proposed in this invention includes a mounting plate, a powder sealing plate, a spray nozzle, and a drive unit. The drive unit synchronously drives the powder sealing plate and the spray nozzle, causing them to move closer together and jointly to the extraction position, or to move them further apart, so that the powder sealing plate moves to the grinding position and the spray nozzle moves to a clearance position. By controlling the spray nozzle and the powder sealing plate to move in opposite directions using the same drive unit, the structure is simplified, the travel space of the spray nozzle and the powder sealing plate is shortened, and the internal structure of the coffee machine is made compact, thereby reducing the overall size of the coffee machine. At the same time, by setting the powder sealing plate and the spray nozzle as independent components, the spray nozzle can be removed from the mounting plate and residual coffee powder can be cleaned in time, preventing the coffee powder from fermenting and producing odors during long-term use of the spray nozzle, improving the cleanliness of the spray nozzle and the coffee extraction and brewing effect. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the coffee machine provided in an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the top surface of the mounting plate inside the housing of the coffee machine provided in an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the bottom surface of the mounting plate provided in an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the structure of the bottom surface of the mounting plate after removing the shower head, provided in an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the shower head provided in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of the faceplate provided in an embodiment of the present invention.

[0030] The component names and labels in the diagram are as follows:

[0031] 10. Outer casing; 20. Water tank assembly; 30. Coffee bean container assembly; 40. Glass cup; 50. Coffee basket assembly; 60. Control panel; 70. Water supply pipe;

[0032] 1. Mounting plate; 11. Water outlet; 12. Rotating shaft; 13. Guide plate; 14. Powder outlet; 2. Powder sealing plate; 21. Second guide post; 3. Shower head; 31. Bottom shell; 310. Water inlet; 311. Main shell; 312. Support arm; 3121. First sliding hole; 313. Slot; 32. Face cover; 320. Spray hole; 321. Snap-on arm; 322. Drainage ring; 3220. Drainage channel; 3221. Cutout; 323. Diverting rib; 4. Driving component; 5. First connecting rod; 51. First guide post; 6. Second connecting rod. Detailed Implementation

[0033] To make the technical problems solved by the present invention, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely for explaining the present invention and are not intended to limit the present invention. Furthermore, it should be noted that, for ease of description, only the parts related to the present invention are shown in the accompanying drawings, not all of them.

[0034] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," and "left," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0037] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0038] like Figure 1 As shown, this embodiment proposes a coffee machine, which is an American-style coffee machine, but is not limited to this. Specifically, the coffee machine includes a casing 10, a water tank assembly 20, a bean hopper assembly 30, a glass 40, a coffee basket assembly 50, and a control panel 60. The glass 40 is placed on the base of the casing 10. The bean hopper assembly 30 includes a bean hopper and a bean hopper lid, and coffee beans are placed inside the bean hopper. The coffee basket assembly 50 has a filter screen to filter out coarse particles of coffee powder. After the coffee beans are ground into coffee powder, they fall into the glass 40 after being filtered through the filter screen. The water tank assembly 20 is used to heat and supply hot water to the glass 40 to brew the coffee powder and extract coffee. The control panel 60 is used to adjust the brewing and extraction process of the coffee machine, such as the grind size of the coffee beans, the amount of water, and the brewing time. The coffee machine is an existing mature product, and the various components and working processes of the coffee machine will not be described in detail.

[0039] Existing American-style coffee machines incorporate a showerhead with spray nozzles to ensure hot water evenly and completely soaks the coffee grounds. The showerhead and the coffee grounds outlet sealing plate are integrated. When grinding coffee beans, the showerhead and sealing plate move synchronously and in the same direction to open the outlet. When brewing coffee, the showerhead and sealing plate return to their original positions to close the outlet. At this point, the showerhead is positioned directly above the filter screen of the coffee basket assembly, spraying hot water onto the coffee grounds to extract the coffee. However, due to the relatively large size of the showerhead, a long travel distance is required for it to move together with the sealing plate to open the outlet, resulting in the showerhead and sealing plate occupying a significant amount of internal space, further increasing the overall size of the coffee machine. Additionally, during brewing, the hot water spraying onto the coffee grounds can easily cause grounds to fly up or splash, making them adhere to the showerhead. This can lead to an unpleasant odor developing on the showerhead over long-term use, affecting the coffee brewing and extraction results.

[0040] To solve the above problems, such as Figure 2 and Figure 3As shown, the coffee machine also includes a mounting plate 1, a sealing plate 2, a shower head 3, and a drive unit 4. The mounting plate 1 is disposed inside the outer casing 10 of the coffee machine and has a water outlet 11 and a powder outlet 14. The sealing plate 2 is slidably disposed on the bottom surface of the mounting plate 1 and has a grinding position for opening the powder outlet 14 and an extraction position for blocking the powder outlet 14. The shower head 3 has multiple spray holes 320 and is detachably rotatably disposed on the bottom surface of the mounting plate 1, and has a clearance position disconnected from the water outlet 11 and an extraction position connected to the water outlet 11. The drive unit 4 is disposed on the mounting plate 1 and is drivenly connected to the sealing plate 2 and the shower head 3 respectively, so as to synchronously drive the sealing plate 2 and the shower head 3 to move closer to each other and move together to the extraction position, with the shower head 3 located directly below the sealing plate 2; or, drive the sealing plate 2 and the shower head 3 to move away from each other, so that the sealing plate 2 moves to the grinding position and the shower head 3 moves to the clearance position.

[0041] In this embodiment, the drive unit 4 synchronously drives the sealing powder plate 2 and the spray head 3, causing them to move closer together and jointly to the extraction position, or driving them further apart, so that the sealing powder plate 2 moves to the grinding position and the spray head 3 moves to the avoidance position. By controlling the spray head 3 and the sealing powder plate 2 to move in opposite directions using the same drive unit 4, the structure is simplified, the travel space of the spray head 3 and the sealing powder plate 2 is shortened, and the internal structure of the coffee machine is made compact, thereby reducing the overall size of the coffee machine. At the same time, by setting the sealing powder plate 2 and the spray head 3 as independent components, the spray head 3 can be removed from the mounting plate 1 and residual coffee powder can be cleaned in time, preventing the coffee powder from fermenting and producing odors during long-term use of the spray head 3, improving the cleanliness of the spray nozzle 320 and the coffee extraction and brewing effect.

[0042] It should be noted that when the sealing powder plate 2 moves from the extraction position towards the grinding position, the shower head 3 simultaneously rotates from the extraction position towards the avoidance position. The sealing powder plate 2 and the shower head 3 move in opposite directions (moving away from each other), and when the sealing powder plate 2 moves to the grinding position, the shower head 3 simultaneously rotates to the avoidance position. Similarly, when the sealing powder plate 2 moves from the grinding position towards the extraction position, the shower head 3 simultaneously rotates from the avoidance position towards the extraction position. The sealing powder plate 2 and the shower head 3 move in opposite directions (moving closer to each other), and when the sealing powder plate 2 moves to the extraction position, the shower head 3 simultaneously rotates to the extraction position.

[0043] like Figure 2 As shown, a water supply pipe 70 is installed on the upper surface of the mounting plate 1. The two ends of the water supply pipe 70 are connected to the water tank assembly 20 and the water outlet 11 of the mounting plate 1, respectively. Figure 4 (As shown) the connection, the water tank assembly 20 delivers hot water to the outlet 11 through the water supply pipe 70. The drive component 4 is a motor, which is small in size to achieve compact installation on the mounting plate 1.

[0044] like Figure 3 and Figure 4 As shown, a rotating shaft 12 is fixedly installed on the bottom surface of the mounting plate 1. The shower head 3 is detachably mounted on the rotating shaft 12 and can rotate around the rotating shaft 12 between the avoidance position and the extraction position. The shower head 3 can be removed from the rotating shaft 12 to clean residual coffee powder in a timely manner, preventing coffee powder from accumulating on the shower head 3 for a long time, which could lead to fermentation and off-flavors.

[0045] Specifically, the shower head 3 includes a base shell 31 and a faceplate 32. The base shell 31 includes a main shell 311 and a support arm 312. The main shell 311 has an inlet 310 that can communicate with the outlet 11. The support arm 312 extends outward from the main shell 311 and is rotatably sleeved on the rotating shaft 12. The driving component 4 is connected to the support arm 312 in a transmission manner. The faceplate 32 is fastened to the main shell 311 and has multiple spray holes 320. The faceplate 32 and the main shell 311 fasten together to form the shower head body. The driving component 4 drives the support arm 312 to rotate around the rotating shaft 12. Figure 3 The shower head rotates in the direction indicated by the curved arrow, thereby switching the shower head body between the avoidance position and the extraction position.

[0046] like Figure 3 and Figure 4 As shown, the output end of the drive unit 4 is connected to a first connecting rod 5. One of the first connecting rod 5 and the support arm 312 is provided with a first sliding hole 3121, and the other of the first connecting rod 5 and the support arm 312 is provided with a first guide post 51. The first guide post 51 slides through the first sliding hole 3121. In this embodiment, the end of the support arm 312 away from the main housing 311 has the first sliding hole 3121, which is an oblong hole. One end of the first connecting rod 5 is correspondingly provided with the first guide post 51. When the first connecting rod 5 is driven to rotate by the drive unit 4, the first guide post 51 slides within the first sliding hole 3121, thereby causing the shower head body to rotate between the avoidance position and the extraction position. In other embodiments, the end of the support arm 312 away from the main housing 311 has the first guide post 51, and one end of the first connecting rod 5 is correspondingly provided with the first sliding hole 3121.

[0047] like Figure 3 and Figure 4 As shown, the output end of the drive unit 4 is connected to a second connecting rod 6. One of the second connecting rod 6 and the powder sealing plate 2 is provided with a second sliding hole, and the other of the two is provided with a second guide post 21. The second guide post 21 slides through the second sliding hole. In this embodiment, one end of the second connecting rod 6 has a second sliding hole, which is an oblong hole. The powder sealing plate 2 has a second guide post 21 on the side near the second connecting rod 6. When the drive unit 4 drives the second connecting rod 6 to rotate, the second guide post 21 slides within the second sliding hole, thereby driving the shower head body along... Figure 3The direction indicated by the straight arrow moves between the grinding position and the extraction position. In other embodiments, a second guide post 21 is provided at one end of the second connecting rod 6, and a second sliding hole is provided at the end of the powder sealing sheet 2 near the second connecting rod 6.

[0048] In this embodiment, the drive component 4 is fixed to the top surface of the mounting plate 1, and the output end of the drive component 4 extends to the bottom surface of the mounting plate 1 and is connected to the first connecting rod 5 and the second connecting rod 6 respectively, so as to synchronously drive the first connecting rod 5 and the second connecting rod 6 to rotate, thereby controlling the shower head 3 and the powder sealing plate 2 to move in opposite directions simultaneously through a single drive component 4, which is easy to operate.

[0049] Furthermore, such as Figure 4 As shown, two guide plates 13 are arranged opposite each other on the bottom surface of the mounting plate 1. The guide plates 13 and the mounting plate 1 form a slide, with the two ends of the slide extending to the grinding position and the extraction position, respectively. The sealing powder sheet 2 is slidably disposed within the two slides. The slides guide and limit the movement of the sealing powder sheet 2 between the grinding position and the extraction position, thereby improving the stability of the movement of the sealing powder sheet 2.

[0050] like Figure 5 As shown, one of the main housing 311 and the faceplate 32 is provided with a latching arm 321, and the other of the main housing 311 and the faceplate 32 is provided with a latching groove 313. The latching arm 321 is engaged in the latching groove 313. The engagement between the latching arm 321 and the latching groove 313 improves the efficiency of assembling and disassembling the main housing 311 and the faceplate 32, making it easier to quickly separate the shower head 3 for cleaning, thus improving cleaning efficiency and quality.

[0051] In this embodiment, the main housing 311 is provided with two circumferentially spaced slots 313, and the cover 32 is provided with two corresponding snap-fit ​​arms 321 on its circumferential sidewall, forming two snap-fit ​​structures, which improves the assembly strength and stability of the main housing 311 and the cover 32. In other embodiments, the main housing 311 is provided with snap-fit ​​arms 321, and the cover 32 is provided with corresponding slots 313 on its circumferential sidewall. The number and position of the snap-fit ​​arms 321 and the slots 313 can be flexibly adjusted, and are not specifically limited here.

[0052] like Figure 5 As shown, when the shower head 3 is in the extraction position, the water inlet 310 on the main housing 311 is connected to the water outlet 11 on the mounting plate 1, so that hot water can flow into the cavity formed by the main housing 311 and the cover 32 through the water pipe 70, the water outlet 11 and the water inlet in sequence, and then be sprayed onto the coffee powder in the glass cup 40 through multiple spray holes 320, thereby steeping and extracting coffee.

[0053] like Figure 6As shown, a flow guide ring 322 is circumferentially arranged on the inner bottom surface of the lid 32. The circumferential sidewalls of the lid 32 and the flow guide ring 322 form a flow guide channel 3220. The water outlet 11 can communicate with the flow guide channel 3220. At least some of the spray holes 320 are located inside the flow guide ring 322. The flow guide ring 322 has multiple slits 3221 spaced apart circumferentially. The flow guide channel 3220 and the interior of the flow guide ring 322 are connected through the multiple slits 3221. Hot water flows circumferentially along the lid 32 through the flow guide channel 3220 and flows through the slits 3221 to the spray holes 320 inside the flow guide ring 322, so that the hot water is evenly distributed on the lid 32 and evenly sprayed through the spray holes 320, avoiding the hot water from concentrating in a single position and causing insufficient coffee extraction.

[0054] Furthermore, a flow-dividing rib 323 is also provided on the inner bottom surface of the cover 32, and a flow-dividing rib 323 is provided circumferentially on the outer edge of a portion of the spray hole 320 within the flow-guiding ring 322. The flow-dividing rib 323 is roughly semi-circular, concentric with the spray hole 320 and surrounding its circumferential edge. This allows the flow-dividing rib 323 to have a certain blocking effect on the water flow into the spray hole 320, preventing excessive water flow in the spray hole 320 closer to the flow-guiding channel 3220 and insufficient water flow in the spray hole 320 farther from the flow-guiding channel 3220. At the same time, the outer surface of the flow-dividing rib 323 has a certain guiding and guiding effect on the hot water, allowing sufficient hot water to flow into the spray hole 320 located at the center of the cover 32, ensuring that the spray volume of the spray holes 320 at various positions within the flow-guiding ring 322 is approximately equal, thus improving the spray uniformity of the spray holes 320.

[0055] Furthermore, the inner bottom surface of the cover 32 is a concave arc surface, that is, the inner bottom surface of the cover 32 is roughly spherical, which can guide and divert hot water, allowing hot water to flow from the edge of the cover 32 to the center under the action of gravity, further improving the spray uniformity of the spray hole 320, so that the coffee powder is fully soaked and extracted to ensure the taste of the coffee.

[0056] The above embodiments merely illustrate the basic principles and characteristics of the present invention. The present invention is not limited to the above embodiments. Various changes and modifications can be made to the present invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A coffee machine, characterized in that, include: Mounting plate (1) is installed inside the outer casing (10) of the coffee machine. Mounting plate (1) has a water outlet (11) and a powder outlet (14). The powder sealing sheet (2) is slidably disposed on the bottom surface of the mounting plate (1) and has a grinding position for opening the powder outlet (14) and an extraction position for blocking the powder outlet (14); The shower head (3) has multiple spray holes (320). The shower head (3) is detachably rotatably mounted on the bottom surface of the mounting plate (1) and has a clearance position disconnected from the water outlet (11) and an extraction position connected to the water outlet (11). A driving component (4) is disposed on the mounting plate (1). The driving component (4) is connected to the sealing powder sheet (2) and the shower head (3) respectively, so as to synchronously drive the sealing powder sheet (2) and the shower head (3) to move closer to each other and move together to the extraction position, and the shower head (3) is located directly below the sealing powder sheet (2); or, drive the sealing powder sheet (2) and the shower head (3) to move away from each other, so that the sealing powder sheet (2) moves to the grinding position and the shower head (3) moves to the avoidance position; The bottom surface of the mounting plate (1) is fixedly provided with a rotating shaft (12); the shower head (3) is detachably sleeved on the rotating shaft (12) and can rotate around the rotating shaft (12) between the avoidance position and the extraction position; The shower head (3) includes: The bottom shell (31) includes a main shell (311) and a support arm (312). The main shell (311) has an inlet (310) that can communicate with the outlet (11). The main shell (311) extends outward to provide the support arm (312). The support arm (312) is rotatably sleeved on the rotating shaft (12). The driving member (4) is connected to the support arm (312) in a transmission. The face cover (32) is fastened to the main housing (311), and the face cover (32) has a plurality of water spray holes (320). The output end of the drive unit (4) is connected to a first connecting rod (5). One of the first connecting rod (5) and the support arm (312) is provided with a first sliding hole (3121), and the other of the first connecting rod (5) and the support arm (312) is provided with a first guide post (51). The first guide post (51) slides through the first sliding hole (3121). The output end of the drive unit (4) is connected to a second connecting rod (6). One of the second connecting rod (6) and the sealing powder sheet (2) is provided with a second sliding hole, and the other of the second connecting rod (6) and the sealing powder sheet (2) is provided with a second guide post (21). The second guide post (21) slides through the second sliding hole.

2. The coffee machine according to claim 1, characterized in that, One of the main housing (311) and the face cover (32) is provided with a buckle arm (321), and the other of the main housing (311) and the face cover (32) is provided with a slot (313), and the buckle arm (321) is engaged in the slot (313).

3. The coffee machine according to claim 2, characterized in that, The inner bottom surface of the cover (32) is provided with a flow-guiding ring (322) in the circumferential direction. The side wall of the cover (32) in the circumferential direction and the flow-guiding ring (322) form a flow-guiding channel (3220). The outlet (11) can communicate with the flow-guiding channel (3220). At least part of the spray holes (320) are located inside the flow-guiding ring (322). The flow-guiding ring (322) is provided with a plurality of cuts (3221) in the circumferential direction. The flow-guiding channel (3220) is connected to the interior of the flow-guiding ring (322) through the plurality of cuts (3221).

4. The coffee machine according to claim 3, characterized in that, The inner bottom surface of the cover (32) is also provided with a flow divider plate (323), and a flow divider plate (323) is provided circumferentially on part of the outer edge of the water spray hole (320) in the flow guide ring (322).

5. The coffee machine according to claim 3, characterized in that, The inner bottom surface of the cover (32) is a concave arc surface.

6. The coffee machine according to any one of claims 1 to 5, characterized in that, The bottom surface of the mounting plate (1) is provided with two guide plates (13) facing each other. The guide plates (13) and the mounting plate (1) form a slide. The two ends of the slide extend to the grinding position and the extraction position respectively. The sealing powder sheet (2) is slidably disposed in the two slides.

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