Coffee machine

Abstract

The invention discloses a coffee machine which comprises the components of a housing which is provided with a first mounting cavity, the first mounting cavity is provided with a first opening, and the first opening is opened and closed through a detachable cover plate; the support is provided with a second mounting cavity, and the second mounting cavity is provided with a second opening; a brewing cavity is formed in the body, a water inlet and a water outlet are formed in the two ends of the brewing cavity respectively, and a feeding port for coffee powder to enter is formed in the side portion of the brewing cavity; the first sealing plate can open and close the water inlet, and the first power source drives the first sealing plate to act; the output end of the water outlet sealing plate assembly can slide in the brewing cavity, and the water outlet sealing plate assembly is provided with a water outlet channel; a coffee outlet structure is arranged on the side wall of the shell and comprises a hollow transfer cavity, a water inlet is formed in the upper portion of the transfer cavity, a water outlet is formed in the lower portion of the transfer cavity, at least one protrusion is arranged at the coffee flowing position in the transfer cavity, and the water inlet is communicated with the water outlet channel. According to the scheme, the structure of the coffee machine can be simplified, and the liquid outlet effect is stabilized.

Description

[0001] This application is a divisional application of the application with the application date of November 8, 2019, application number 2019110862784, and invention title "A coffee machine". Technical Field

[0002] The present invention relates to the technical field of coffee machines, and in particular to a coffee machine. Background Art

[0003] A coffee machine is a device that integrates functions of grinding powder, pressing powder, loading powder, brewing, and removing residues, and can realize automatic control of the whole process of brewing coffee. Existing coffee machines generally have a complex structure, are inconvenient to assemble, have low production efficiency, and moreover, the liquid outlet effect of existing coffee machines is unstable. Therefore, the structure of the coffee machine still needs to be further optimized. Summary of the Invention

[0004] An object of the present invention is to solve at least one of the technical problems existing in the prior art, and provide a coffee machine that can simplify the structure of the existing coffee machine and stabilize the coffee liquid outlet effect.

[0005] According to an aspect of the present invention, there is provided a coffee machine, including:

[0006] A housing having a first installation cavity therein. The first installation cavity is provided with a first opening on the side, and the first opening is opened and closed by a detachable cover plate.

[0007] A bracket having a second installation cavity. The bracket is detachably installed in the first installation cavity, and the second installation cavity has a second opening.

[0008] A main body detachably installed in the second installation cavity. The main body has a brewing cavity therein. Both ends of the brewing cavity have a water inlet and a water outlet respectively, and a feed port for coffee powder to enter is provided on the side of the brewing cavity. The main body can enter and exit through the first opening and the second opening.

[0009] A water inlet sealing plate assembly including a first sealing plate and a first power source. The first sealing plate is movably installed in the main body and is configured to be able to open and close the water inlet. The first power source is installed on the bracket, and the first power source drives the first sealing plate to act.

[0010] A water outlet sealing plate assembly installed on the bracket. The output end of the water outlet sealing plate assembly is configured to be able to slide in the brewing cavity, and the water outlet sealing plate assembly has a water outlet channel.

[0011] Wherein, a coffee outlet structure is provided on the side wall of the housing. The coffee outlet structure includes a transfer cavity which is hollow inside. An inlet is provided at the upper part of the transfer cavity, and an outlet is provided at the lower part. The inlet and the outlet are arranged in a staggered manner. At least one protrusion is provided at the place where coffee flows through in the transfer cavity, and a sharp corner is provided on the protrusion. The inlet is communicated with the outlet channel.

[0012] Preferably, a guide rail is provided on the side wall of the housing, and a lifting frame is installed on the guide rail in a liftable manner. A magnetic connection is provided between the lifting frame and the guide rail for positioning, and the transfer cavity is arranged inside the lifting frame.

[0013] Preferably, at least one of the above-mentioned protrusions is further provided at the inlet and / or the outlet.

[0014] Preferably, the inlet sealing plate assembly further includes a driving plate and an intermediate plate. One end of the driving plate is rotatably installed in the main body through a first rotating shaft. The other end of the driving plate is hinged to one end of the intermediate plate. The other end of the intermediate plate is hinged to the first sealing plate through a second rotating shaft. A first guide groove and a second guide groove are provided on the inner side wall of the main body. The end of the second rotating shaft is located in the first guide groove, and a guide post is provided on the first sealing plate. The end of the guide post is located in the second guide groove.

[0015] Preferably, the first power source includes a first motor and a speed reducer. A connection hole is provided at one end of the first rotating shaft, and the end of the first rotating shaft extends outside the main body. The first motor and the speed reducer are installed on the bracket. The first motor is connected to the input end of the speed reducer, and the output end of the speed reducer is in transmission connection with the connection hole. An output shaft is connected to the output end of the speed reducer. The output shaft is rotatably installed on the bracket and extends into the second installation cavity.

[0016] Preferably, the inlet sealing plate assembly further includes a water inlet pipeline. The water inlet pipeline includes a first interface, a pipeline and a water inlet channel arranged in the first sealing plate. The first interface penetrates through the side wall of the main body, and the first interface is communicated with the water inlet channel through the pipeline. A second interface is provided on the bracket, and the second interface extends into the second installation cavity.

[0017] Preferably, the outlet sealing plate assembly includes a second sealing plate and a second power source. The second sealing plate is slidably installed on the bracket. The second power source is installed on the bracket, and the output end of the second power source is in transmission connection with the second sealing plate. The outlet channel penetrates through the second sealing plate.

[0018] Preferably, a limiting plate is rotatably arranged on the bracket, and the limiting plate is configured to open and close the second opening.

[0019] Preferably, an installation hole is further provided in the upper part of the housing. A circuit board is arranged at the bottom of the installation hole. A light source and a switch module are arranged on the circuit board. A key assembly and a light-transmitting plate are further installed in the installation hole. The key assembly is located above the switch module. The light-transmitting plate is annular and is arranged around the key assembly. The light-transmitting plate is located above the light source.

[0020] Preferably, the light-transmitting plate has a light incident surface and a light emergent surface, and the light entering from the light incident surface can reach the light emergent surface after at least two reflections.

[0021] Any of the above technical solutions has at least the following beneficial effects: When assembling the above technical solutions, the main body, the water inlet sealing plate assembly and the water outlet sealing plate assembly can be first installed on the bracket, and then the whole can be installed in the first installation cavity after being assembled. Compared with directly installing the main body, the water inlet sealing plate assembly and the water outlet sealing plate assembly in the housing, the assembly process can be optimized (if the main body, the water inlet sealing plate assembly and the water outlet sealing plate assembly are directly installed in the housing, it is necessary to work in the housing for a long time, and the operation space in the housing is not large, resulting in low work efficiency); In addition, the main body can be separately removed relative to the bracket. The water outlet sealing plate assembly and the first power source are located on the bracket, which can simplify the structure of the main body, reduce the size of the main body at the same time, facilitate the disassembly and assembly of the main body, and through the setting of the coffee outlet structure, the coffee liquid can be buffered through the transfer cavity, and can also flow through the protrusions for diversion, and can also puncture larger bubbles, making the coffee liquid more delicate and more stable when flowing out. Description of the Drawings

[0022] The present invention will be further described below with reference to the drawings and embodiments;

[0023] Figure 1 It is a schematic diagram of an embodiment of the present invention;

[0024] Figure 2 It is Figure 1 Exploded view;

[0025] Figure 3 It is a schematic diagram of an embodiment of the bracket, the main body, the water inlet sealing plate assembly and the water outlet sealing plate assembly in the present invention;

[0026] Figure 4 It is Figure 3 Exploded schematic Figure 1 ;

[0027] Figure 5 It is Figure 3 Exploded schematic Figure 2 ;

[0028] Figure 6 For Figure 3 Exploded view Figure 3 ;

[0029] Figure 7 It is a schematic diagram of the implementation manner of the button assembly and its peripheral components in the present invention;

[0030] Figure 8 For Figure 7 Cross-sectional schematic diagram;

[0031] Figure 9 For Figure 7 Exploded view;

[0032] Figure 10 It is a cross-sectional schematic diagram of the implementation manner of the light-transmitting plate;

[0033] Figure 11 It is a schematic diagram of the implementation manner of the transfer cavity in the present invention;

[0034] Figure 12 It is a schematic diagram of the implementation manner of the coffee outlet structure in the present invention;

[0035] Figure 13 For Figure 12 Exploded view Figure 1 ;

[0036] Figure 14 For Figure 13 Exploded view Figure 2 . Specific embodiments

[0037] This part will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the present invention. However, it should not be construed as a limitation on the protection scope of the present invention.

[0038] In the description of the present invention, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc., is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the present invention.

[0039] In the description of the present invention, the meaning of "several" is one or more, the meaning of "multiple" is more than two, and understandings such as "greater than", "less than", and "exceeding" do not include the corresponding number, while understandings such as "above", "below", and "within" include the corresponding number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific content of the technical solution.

[0041] Refer to Figures 1 - 14, a coffee machine, comprising a housing 1, a bracket 2, a main body 3, a water inlet sealing plate assembly 4 and a water outlet sealing plate assembly 5; a first installation cavity 6 is provided inside the housing 1, a first opening is provided on the side of the first installation cavity 6, and the first opening is opened and closed by a detachable cover plate 8; the bracket 2 has a second installation cavity, the bracket 2 is detachably installed inside the first installation cavity 6, and the second installation cavity has a second opening; the main body 3 is detachably installed on the second installation cavity 7, a brewing cavity is provided inside the main body 3, water inlets 9 and water outlets 10 are respectively provided at both ends of the brewing cavity, and a feed inlet 11 for coffee powder to enter is provided on the side of the brewing cavity; the main body 3 can enter and exit through the first opening and the second opening; the water inlet sealing plate assembly 4 includes a first sealing plate 12, a water inlet pipeline and a first power source 13, the first sealing plate 12 is movably installed inside the main body 3, the first sealing plate 12 is configured to be able to open and close the water inlet 9, the first power source 13 is installed on the bracket 2, and the first power source 13 drives the first sealing plate 12 to act; the water outlet sealing plate assembly 5 is installed on the bracket 2, the output end of the water outlet sealing plate assembly 5 is configured to be able to slide inside the brewing cavity, the water outlet sealing plate assembly 5 has a water outlet channel 14, a coffee outlet structure is provided on the side wall of the housing 1, the coffee outlet structure includes a transfer cavity 56, the inside of the transfer cavity 56 is hollow, a coffee inlet 57 is provided at the upper part of the transfer cavity 56, a coffee outlet 58 is provided at the lower part of the transfer cavity 56, the coffee inlet 57 and the coffee outlet 58 are arranged in a staggered manner, a protrusion 59 is provided at the place where coffee flows through inside the transfer cavity 56, a sharp corner is provided on the protrusion 59, and the coffee inlet 57 is communicated with the water outlet channel 14. The specific operation principle is as follows. In the initial state, the first sealing plate 12 closes the water inlet 9, coffee powder enters from the feed inlet 11, then the output end of the water outlet sealing plate assembly 5 moves into the brewing cavity, cooperates with the first sealing plate 12 to form a closed cavity inside the brewing cavity, and then high-temperature water is injected through the water inlet pipeline to brew the coffee powder. After brewing, the output end of the water outlet sealing plate assembly 5 continues to slide into the brewing cavity, and the brewed coffee is extruded from the water outlet channel 14.The brewed coffee enters the transfer chamber 56 from the water outlet channel 14, flows to the bottom of the transfer chamber 56 under the action of gravity, and then flows along the bottom towards the coffee outlet 58, providing enough space for the setting of the protrusion 59; the protrusion 59 is located on the path where the coffee flows through the bottom of the transfer chamber 56, and the protrusion 59 is in the shape of a triangular prism; the protrusion 59 can also be set in the shape of a triangular pyramid or a cuboid, etc.; in addition, in order to achieve a better foaming effect, it can be considered to also set four evenly distributed protrusions 59 on the inner wall of the coffee outlet 58, and the protrusion 59 is in the shape of a triangular prism; or set the protrusion 59 on the inner side wall of the coffee inlet 57; the protrusion 59 located on the path where the coffee flows through the bottom of the transfer chamber 56 is close to the coffee outlet 58, and the protrusions 59 on the inner wall of the coffee outlet 58 are distributed on both sides of the protrusion 59 on the path where the coffee flows through the bottom of the transfer chamber 56, so as to divide the coffee flow, and then flow through the protrusion 59 located at the coffee outlet 58. The coffee liquid is buffered by the transfer chamber, and can also flow through the protrusion for diversion, and can also pierce larger bubbles, improving the foaming effect, making the coffee liquid flow out more delicately and more stably. In the above-mentioned embodiment, during assembly, the main body 3, the water inlet sealing plate assembly 4 and the water outlet sealing plate assembly 5 can be first installed on the bracket 2, and then the whole can be installed in the first installation cavity 76 after being assembled. Compared with directly installing the main body 3, the water inlet sealing plate assembly 4 and the water outlet sealing plate assembly 5 into the housing 1, the assembly process can be optimized (if the main body 3, the water inlet sealing plate assembly 4 and the water outlet sealing plate assembly 5 are directly installed in the housing 1, it is necessary to work in the housing 1 for a long time, and the operating space in the housing 1 is not large, resulting in low work efficiency); in addition, the main body 3 can be separately removed relative to the bracket 2, and the water outlet sealing plate assembly 5 and the first power source 13 are located on the bracket 2, which can simplify the structure of the main body 3, and at the same time can reduce the size of the main body 3, facilitating the disassembly and assembly of the main body 3.

[0042] In addition, those skilled in the art can understand that the protrusion 59 located at the bottom of the transfer chamber 56, the protrusion 59 on the inner side wall of the coffee inlet 57, and the protrusion 59 on the inner side wall of the coffee outlet 58 can be set independently of each other without interference, and can be set only at one position, or can be set at the three positions at the same time.

[0043] In addition, those skilled in the art can understand that the shape of the transfer chamber 56 is not limited to the above shape, and it can be of any shape, such as a cuboid, etc. The coffee inlet 57 and the coffee outlet 58 can also be arranged on the same straight line. At this time, only the protrusion 59 needs to be set in the coffee inlet 57 and the coffee outlet 58.

[0044] Such as Figures 11 - 14As shown, in some embodiments, a guide rail 60 is provided on the side wall of the housing 1. A lifting frame 61 is liftably mounted on the guide rail 60. A magnetic connection and positioning is provided between the lifting frame 61 and the guide rail 60, and a transfer chamber 56 is arranged inside the lifting frame 61. The magnetic force between the lifting frame 61 and the guide rail 60 can ensure that the two maintain a stable state without external force. When it is necessary to adjust the height of the lifting frame 61, the lifting frame 61 can be manually moved up and down. The up-and-down movement of the lifting frame 61 can adjust the height of the coffee outlet so as to be applicable to cups of different heights.

[0045] An installation rod 62 protrudes from the side wall of the housing 1. The guide rail 60 includes two vertically arranged fourth guide grooves which are respectively arranged on the two vertical outer side walls of the installation rod 62. The installation rod 62 is made of iron material. A vertical rod 63 is arranged on the lifting frame. The vertical rod 63 has magnetism and can slide in the fourth guide groove. The vertical rod 63 can be made of magnetic material, or a magnet is installed on the vertical rod 63 to realize the magnetism of the vertical rod 63. The vertical rod 63 and the fourth guide groove are relatively closely matched, which can reduce unnecessary swinging while ensuring normal lifting.

[0046] As Figures 3 - 6 As shown, in some embodiments, the water inlet sealing plate assembly 4 further includes a driving plate 15 and an intermediate plate 16. One end of the driving plate 15 is rotatably installed in the main body 3 through a first rotating shaft 17. The other end of the driving plate 15 is hinged to one end of the intermediate plate 16. The other end of the intermediate plate 16 is hinged to the first sealing plate 12 through a second rotating shaft 18. A first guide groove 19 and a second guide groove 20 are arranged on the inner side wall of the main body 3. The end of the second rotating shaft 18 is located in the first guide groove 19. A guide post 21 is arranged on the first sealing plate 12, and the end of the guide post 21 is located in the second guide groove 20. The first power source 13 drives the driving plate 15 to act. The driving plate 15, the intermediate plate 16 and the first sealing plate 12 are all located in the main body 3. Combining the first guide groove 19 and the second guide groove 20 can limit the movement track of the first sealing plate 12. The arrangement of the driving plate 15 and the intermediate plate 16 can amplify the power output from the first power source 13 so as to provide sufficient power for the first sealing plate 12. The above water inlet sealing plate assembly 4 has a simple and ingenious structure, occupies less volume, is conducive to being separately arranged from the first power source 13, and works stably and reliably.

[0047] As Figures 3 - 6As shown, in some embodiments, for facilitating slag discharge, the main body 3 includes an inclined section 22 and a horizontal section 23. The brewing chamber is located in the inclined section 22. The horizontal section 23 is docked with the water inlet 9, and a slag discharge port 24 is provided at the lower part of the docking position. The driving plate 15 and the intermediate plate 16 are located in the horizontal section 23 away from the end of the slag discharge port 24. After coffee brewing is completed, the coffee grounds generally adhere to the first sealing plate 12. Thus, during the process of opening the water inlet 9 by the first sealing plate 12, the coffee grounds will automatically be discharged from the brewing chamber, then leave the main body 3 from the slag discharge port 24, and then enter the waste bin. The waste bin is located in the first installation cavity 76 and below the slag discharge port 24. After the waste bin collects enough slag, it can be removed, the slag is poured into the trash can, and then the waste bin is put back to its original position. The above-described embodiment of the main body 3 has a reasonable layout, which is conducive to slag discharge and simplifies the overall structure.

[0048] As Figures 3 - 6 shown, in some embodiments, the movement trajectory of the first sealing plate 12 can be designed according to the shapes of the first guide groove 19 and the second guide groove 20. After coffee brewing is completed and the coffee grounds need to be discharged, in order to smoothly discharge the coffee grounds, the first sealing plate 12 needs to be rotated towards the ground. For this purpose, the following design is made in this embodiment. The first guide groove 19 includes a first section and a second section connected to each other. The first section is parallel to the center line of the brewing chamber, and the included angle between the second section and the first section is set to 90° - 135°; the second guide groove 20 includes a third section and a fourth section connected to each other. The third section is parallel to the center line of the brewing chamber, and the included angle between the third section and the fourth section is set to 90° - 135°; under the limitation of the above first guide groove 19 and second guide groove 20, the first sealing plate 12 approaches the brewing chamber in a state perpendicular to the center line of the brewing chamber. After the first sealing plate 12 is fully opened, the first sealing plate 12 is inclined or vertically downward. Thus, it can be ensured that the coffee grounds on the first sealing plate 12 are discharged. The design of the first guide groove 19 and the second guide groove 20 can enable the first sealing plate 12 to operate according to the set trajectory, which is very convenient and is relatively simpler than purely using a connecting rod structure to design the movement trajectory of the first sealing plate 12, saving parts and internal space.

[0049] As Figures 3 - 6As shown, in some embodiments, the first power source 13 includes a first motor 25 and a speed reducer 26. One end of the first rotating shaft 17 is provided with a connection hole 27 and the end of the first rotating shaft 17 extends outside the main body 3. The first motor 25 and the speed reducer 26 are installed on the bracket 2. The first motor 25 is connected to the input end of the speed reducer 26, and the output end of the speed reducer 26 is in transmission connection with the connection hole 27. The speed reducer 26 can use a worm and worm gear or a gearbox for speed reduction. The output end of the speed reducer 26 is connected with an output shaft 28. The output shaft 28 is rotatably installed on the bracket 2 and the output shaft 28 extends into the second installation cavity 7. In this way, during the process of installing the main body 3 into the second installation cavity 7, the output shaft 28 is synchronously inserted into the connection hole 27. There are protrusions on the inner side wall of the connection hole 27, and there are grooves on the outer side wall of the output shaft 28 that cooperate with the protrusions. With the cooperation of the protrusions and the grooves, a transmission connection is formed. It can be seen from the above that the transmission connection between the first power source 13 and the first sealing plate 12 is very convenient. The setting of the first power source 13 on the bracket 2 does not cause any adverse effects on the driving of the first sealing plate 12, and the structure is very ingenious and practical.

[0050] As Figures 3 - 6 shown, in some embodiments, the water inlet pipeline includes a first interface 29, a pipeline and a water inlet channel 30 arranged in the first sealing plate 12. The first interface 29 is arranged through the side wall of the main body 3. The first interface 29 is communicated with the water inlet channel 30 through the pipeline. A second interface 31 is arranged on the bracket 2 and the second interface 31 extends into the second installation cavity 7. The first interface 29 and the second interface 31 are of a plug-in connection structure. During the process of installing the main body 3 into the second installation cavity 7, the connection between the first interface 29 and the second interface 31 can be completed synchronously, which is very convenient. The pipeline is located inside the main body 3, that is, the pipeline cannot be observed outside the main body 3, and there is no problem of messy pipeline layout, reducing the possibility of pipeline entanglement or scratching.

[0051] As Figures 3 - 6As shown, in some embodiments, the water outlet sealing plate assembly 5 includes a second sealing plate 32 and a second power source 33. The second sealing plate 32 is slidably mounted on the bracket 2, and the second power source 33 is mounted on the bracket 2. The output end of the second power source 33 is drivingly connected to the second sealing plate 32; the water outlet channel 14 is disposed through the second sealing plate 32. The second power source 33 is provided as a second motor. A gear 34 is rotatably provided on the bracket 2, and a threaded hole is provided on the gear 34. A screw rod 64 is fixedly connected to one side of the second sealing plate 32, and the screw rod 64 is threadedly connected to the threaded hole. The output end of the second motor is drivingly connected to the gear; a third guiding groove 35 is provided on the side wall of the screw rod 64, and a limiting block 36 is provided on the bracket 2. The limiting block 36 is inserted into the third guiding groove 35 to limit the rotation of the screw rod 64 relative to the bracket 2, so that the screw rod 64 can only slide relative to the bracket 2. The operating principle of the water outlet sealing plate assembly 5 in the above embodiment is as follows. When the second motor operates, the second motor drives the gear to rotate through a reduction gear set. The gear cooperates with the screw rod 64. Since the screw rod 64 cannot rotate, the screw rod 64 can only slide relative to the bracket 2, thereby driving the second sealing plate 32 to slide in the brewing chamber. Of course, those skilled in the art can understand that the second power source 33 can also adopt other embodiments, for example, it can adopt a cylinder or an oil cylinder or a linear motor drive, etc.

[0052] As Figures 2 - 6 shown, in some embodiments, a limiting plate 37 is also rotatably provided on the bracket 2. The limiting plate 37 is configured to be able to open and close the second opening; a micro switch 38 is also provided on the bracket 2. The micro switch 38 is used to detect the state of the limiting plate 37. When the limiting plate 37 is in the position of opening the second opening, the coffee machine cannot work. Only when the limiting plate 37 is in the position of closing the second opening can the coffee machine work normally. By providing the limiting plate 37, the main body 3 can be prevented from accidentally sliding out, ensuring the normal operation of the coffee machine.

[0053] As Figure 2As shown, in some embodiments, a third rotating shaft 39 is disposed slightly below the middle of the cover plate 8. A sunken platform 40 is provided at the opening. An outward positioning groove 41 is provided on the sunken platform 40. The third rotating shaft 39 cooperates with the positioning groove 41. The sunken platform 40 located below the positioning groove 41 contracts toward the inside of the housing 1, providing space for the lower end of the cover plate 8 to rotate toward the inside of the housing 1. The upper end of the cover plate 8 is magnetically connected to the sunken platform 40. In some embodiments, a magnet is provided at the upper end of the cover plate 8, and a patch is provided at the sunken platform 40 corresponding to the magnet. To achieve a more stable connection, a locking hole is provided on the sunken platform 40, and a locking hook is provided at the upper end of the cover plate 8. When the cover plate 8 needs to be disassembled, press the lower part of the cover plate 8 (below the third rotating shaft 39) by hand. The cover plate 8 can rotate around the third rotating shaft 39, and then the locking hook disengages from the locking hole, and the upper end of the cover plate 8 disengages from the sunken platform 40. At this time, the upper end of the cover plate 8 can be grasped to remove the cover plate 8 as a whole, and then the main body 3 can be taken and placed. The structure is very simple and ingenious.

[0054] As Figures 7 - 10 shown, in some embodiments, an installation hole 42 is further provided in the upper part of the housing 1. A circuit board 43 is provided at the bottom of the installation hole 42. A light source 44 and a switch module are provided on the circuit board 43. A key assembly 45 and a light-transmitting plate 46 are also installed in the installation hole 42. The key assembly 45 is located above the switch module. The light-transmitting plate 46 is annular and is arranged around the key assembly 45. The light-transmitting plate 46 is located above the light source 44. In the above embodiment, by providing the light source 44 on the circuit board 43, the light emitted by the light source 44 is guided through the light-transmitting plate 46 to be emitted around the key assembly 45, illuminating the key assembly 45. Even in a relatively dark environment, the user can still clearly observe the key assembly 45, reducing incorrect operations. The structure of the present invention is simple and practical, and the effect is remarkable.

[0055] As Figures 7 - 10 shown, in some embodiments, the light-transmitting plate 46 has a light-incident surface 47 and a light-emitting surface 48. The light entering from the light-incident surface 47 needs to be reflected twice to reach the light-emitting surface 48. The main purpose of the light source 44 is to illuminate the periphery of the key assembly 45. Therefore, the power requirement for the light source 44 is relatively low. Therefore, only a small number of light sources 44 are required to achieve this. The small number of light sources 44 will inevitably lead to the problem of relatively concentrated light emission. In this embodiment, by reflecting the light emitted by the light source 44 at least twice before emitting it, the light emitted from the light-emitting surface 48 is more uniform, soft and not dazzling, giving a very comfortable feeling. Of course, those skilled in the art can understand that the number of reflections of the light entering from the light-incident surface 47 to reach the light-emitting surface 48 can be adjusted according to the actual situation. If the power of the light source 44 is relatively high, three reflections or four reflections can be set, etc.

[0056] As Figures 7 - 10As shown, in some embodiments, the light-transmitting plate 46 includes a light-incident section 49, a light-emitting section 50, and an intermediate section 51. The light-incident section 49, the light-emitting section 50, and the intermediate section 51 are all annular. The diameter of the light-incident section 49 is greater than that of the light-emitting section 50. The light-incident surface 47 is located at one end of the light-incident section 49. The other end of the light-incident section 49 is connected to one end of the light-emitting section 50 through the intermediate section 51. The light-emitting surface 48 is located at the other end of the light-emitting section 50. A first chamfer is provided on the outer side of the corner formed at the connection between the light-incident section 49 and the intermediate section 51. A second chamfer is provided on the outer side of the corner formed at the connection between the light-emitting section 50 and the intermediate section 51. In the above embodiments, the light emitted by the light source 44 enters from the light-incident surface 47, is reflected at the first chamfer and enters the intermediate section 51, then is reflected at the second chamfer and enters the light-emitting section 50, and then is emitted from the light-emitting surface 48. The light-transmitting plate 46 with the above structure is easy to process, convenient to assemble, and has a low cost. The shape of the light-transmitting plate 46 can be designed according to the shape of the key assembly 45. If the key assembly 45 is square, the light-transmitting plate 46 can be set in a square ring shape.

[0057] As Figures 7 - 10 shown, in some embodiments, the key assembly 45 includes a support member 52, the upper plate of the housing 1, and a key body 53. A protective layer is provided between the support member and the circuit board. The protective layer 54 covers the circuit board 43. The support member 52 is mounted on the circuit board 43. The support member 52 is provided with an annular mounting groove corresponding to the light-transmitting plate 46. The key body 53 is mounted on the support member 52 in a liftable manner. The upper plate covers the intermediate section 51. The diameter of the mounting hole 42 is adapted to the outer diameter of the light-emitting section 50. In the above embodiments, the upper plate and the support member 52 can install and fix the light-transmitting plate 46, and at the same time can block the side surfaces of the light-transmitting plate 46 except the light-incident surface 47 and the light-emitting surface 48 to prevent light leakage. Of course, those skilled in the art can understand that other methods can also be used to prevent light leakage. For example, the side surfaces of the light-transmitting plate 46 except the light-incident surface 47 and the light-emitting surface 48 can be selected to be coated with opaque paint to prevent light leakage.

[0058] As Figures 7 - 10 shown, in some embodiments, in order to allow the light emitted by the light source 44 to enter the light-incident surface 47, the support member 52 is provided with an avoidance hole 55 corresponding to the light source 44; or the support member 52 is provided in a transparent shape corresponding to the light source 44, or the entire support member 52 is provided in a transparent shape, which is beneficial to one-time processing and forming.

[0059] Among them, the protective layer 54 can prevent the key body 53 from damaging the circuit board 43. In order to prevent too serious light attenuation, the protective layer 54 is integrally provided in a transparent shape, which is beneficial to one-time processing and forming. Of course, those skilled in the art can understand that the protective layer 54 only needs to be provided in a transparent shape corresponding to the light source 44.

[0060] The embodiments of the present invention have been described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art.

Claims

1. A coffee machine, characterized in that, comprising: a housing having a first installation cavity therein, the first installation cavity being provided with a first opening at a side portion, and the first opening being opened and closed by a detachable cover plate; a bracket having a second installation cavity, the bracket being detachably installed in the first installation cavity, and the second installation cavity having a second opening; a main body detachably installed in the second installation cavity, the main body having a brewing cavity therein, both ends of the brewing cavity having a water inlet and a water outlet respectively, and the side portion of the brewing cavity having a feed port for coffee powder to enter; the main body can enter and exit through the first opening and the second opening; a water inlet sealing plate assembly including a first sealing plate and a first power source, the first sealing plate being movably installed in the main body, the first sealing plate being configured to be able to open and close the water inlet, the first power source being installed on the bracket, and the first power source driving the first sealing plate to act; a water outlet sealing plate assembly installed on the bracket, an output end of the water outlet sealing plate assembly being configured to be able to slide in the brewing cavity, and the water outlet sealing plate assembly having a water outlet channel; wherein, a coffee outlet structure is provided on the side wall of the housing, the coffee outlet structure including a transfer cavity which is hollow inside, the upper part of the transfer cavity being provided with a water inlet, the lower part being provided with a water outlet, the water inlet and the water outlet being arranged in a staggered manner, at least one protrusion being provided at a place where coffee flows through in the transfer cavity, a sharp corner being provided on the protrusion, and the water inlet being communicated with the water outlet channel.

2. The coffee machine according to claim 1, characterized in that, a guide rail is provided on the side wall of the housing, a lifting frame is liftably installed on the guide rail, a magnetic connection is provided between the lifting frame and the guide rail for positioning, and the transfer cavity is arranged in the lifting frame.

3. The coffee machine according to claim 1, characterized in that, at least one of the protrusions is further provided at the water inlet and / or the water outlet.

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