Semi-automatic coffee machine

Abstract

The utility model discloses a semi-automatic coffee machine which comprises a bean grinding structure, a pressing extraction structure, a powder feeding structure and a powder receiving structure, a two-connecting-rod unit used for controlling the pressing extraction structure to move is arranged in the pressing extraction structure, and a driving unit used for driving is connected to the two-connecting-rod unit. The powder feeding structure is connected with the pressing extraction structure through a linkage unit; the driving unit drives the two-connecting-rod unit to move, the two-connecting-rod unit drives the downward-pressing extraction structure to move, and the downward-pressing extraction structure drives the powder feeding structure to conduct powder feeding movement through the linkage unit. The coffee machine is reasonable in structural design, the motor drives the downward-pressing extraction structure to reciprocate up and down through the two-connecting-rod unit, the downward-pressing extraction structure drives the powder feeding structure to feed powder through the linkage unit, the steps of automatic downward-pressing extraction and powder feeding can be achieved, the quality of coffee powder is guaranteed, and the taste of coffee is improved; and a powder outlet baffle for blocking the powder outlet is arranged in the powder feeding structure, so that hot air and dust are prevented from entering the powder outlet channel.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, and more particularly to a semi-automatic coffee machine. Background Technology

[0002] Coffee, as a signature beverage of modern lifestyle, has gradually become an integral part of people's daily work, study, and life. Brewing a rich, aromatic cup of coffee during leisure time not only greatly enhances one's spirits but also allows one to slowly savor the boundless relaxation and beauty that leisure time brings.

[0003] In the current technology, semi-automatic coffee machines on the market have the advantages of small footprint and high cost performance, and are widely used in homes. Currently, when using semi-automatic coffee machines, after the ground coffee powder in the grinder is connected to the powder dispenser, the outlet is not sealed, which allows hot air and dust to enter the powder dispensing channel, affecting the freshness and aroma of the coffee powder. Furthermore, after the coffee powder enters the powder dispenser, the user needs to manually press a button to press down and extract the coffee. This structure is prone to causing the coffee powder in the dispenser to be exposed to the air for a long time without extraction due to user negligence, thus affecting the taste and aroma of the coffee. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a semi-automatic coffee machine in light of the current state of the technology.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a semi-automatic coffee machine, including a grinding structure, a pressing extraction structure, a powder feeding structure, and a powder receiving structure. The pressing extraction structure is provided with a two-bar linkage unit for controlling the movement of the pressing extraction structure. A driving unit for driving is connected to the two-bar linkage unit. The powder feeding structure is connected to the pressing extraction structure through a linkage unit. The driving unit drives the two-bar linkage unit to move, the two-bar linkage unit drives the pressing extraction structure to move, and the pressing extraction structure drives the powder feeding structure to perform powder feeding movement through the linkage unit.

[0006] Preferably, the pressure extraction structure includes a shell, a pressure extraction component is provided inside the shell, at least two guide grooves are provided on the inner wall of the shell along the height direction of the shell for guiding the movement of the pressure extraction component, and a guide post is provided along the outer edge of the pressure extraction component to cooperate with the guide groove. The guide post is located in the guide groove and moves along the guide groove.

[0007] Preferably, the drive unit includes a motor, which is arranged on the outside of the housing and near the top of the housing. A first drive shaft for transmission is connected to the motor and is inserted through the housing. A second drive shaft that cooperates with the linkage unit is inserted near the bottom of the pressing extraction component.

[0008] Preferably, the two-bar linkage unit includes a rotating rod and a linkage rod. One end of the rotating rod is fixedly sleeved on the first transmission shaft, and the linkage rods are arranged on both sides of the rotating rod. The other end of the rotating rod is connected to the ends of the linkage rods on both sides through a pin. The other ends of the linkage rods on both sides are fixedly sleeved on the second transmission shaft.

[0009] Preferably, the linkage unit includes linkage members disposed on both sides of the housing, and a rotating shaft is provided extending from the bottom edge of the housing towards the linkage members on both sides. The linkage members are rotatably disposed on the rotating shafts. The linkage unit also includes rotating members sleeved on both sides of the second transmission shaft. The rotating members and the second transmission shaft move and rotate synchronously. An extension rod is provided extending from the rotating members towards the linkage members. The extension rod is inserted into the linkage members and drives the linkage members to rotate around the rotating shafts.

[0010] Preferably, the powder feeding structure includes a first powder outlet fixedly mounted on the grinding structure, a second powder outlet sleeved near the tail end of the first powder outlet, the second powder outlet sliding along the first powder outlet, the tail end of the second powder outlet being a powder outlet, a powder outlet baffle provided on the second powder outlet near the powder outlet, the powder outlet baffle being rotatably mounted on the second powder outlet via a baffle shaft, a torsion spring provided on the baffle shaft, the powder outlet baffle rotating around the baffle shaft; connecting posts extending outward from both sides of the second powder outlet are respectively provided, and a connecting hole cooperating with the connecting post is provided on the linkage component.

[0011] Preferably, the connecting hole is an elongated circular hole, and the connecting post is inserted into the connecting hole; the linkage extends inward near the powder outlet baffle and has a contact part that cooperates with the powder outlet baffle. The contact part is arranged at both ends of the powder outlet baffle, and the contact part abuts against the powder outlet baffle and drives the powder outlet baffle to rotate, thereby controlling the opening and closing of the powder outlet.

[0012] Preferably, a rotation limiting member is fixedly sleeved at the end of the first drive shaft away from the motor. The first drive shaft drives the rotation limiting member to rotate synchronously. A first limiting part and a second limiting part are respectively arranged on both sides of the rotation limiting member. The first limiting part and the second limiting part are both fixed on the housing. The first limiting part and the second limiting part are respectively provided with a first limiting surface and a second limiting surface that abut against the rotation limiting member. A micro switch is provided on both the first limiting surface and the second limiting surface. The micro switch is electrically connected to the motor.

[0013] Preferably, the grinding structure includes a grinding chamber and a control unit connected to the inside of the grinding chamber. The control unit is located at the bottom of the grinding chamber, and the bottom of the grinding chamber is also provided with a powder outlet. A first powder outlet is snapped onto the powder outlet, and the powder outlet and the first powder outlet are internally connected.

[0014] Preferably, the powder receiving structure includes a powder receiver with a powder receiving port. When the powder outlet baffle leaves the powder outlet, the powder outlet aligns with the powder receiving port.

[0015] Compared with the prior art, the advantages of this utility model are as follows: the motor drives the pressing extraction structure to move up and down reciprocally through the two-link unit, and the pressing extraction structure drives the powder feeding structure to feed powder through the linkage unit, which realizes the automated pressing extraction and powder feeding steps, ensuring the quality of coffee powder in the powder receiver and improving the taste of coffee. In addition, the powder feeding structure is equipped with a powder outlet baffle to block the powder outlet and prevent hot air and dust from entering the powder outlet channel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the original structure of this utility model;

[0018] Figure 3 This is a schematic diagram of the structure of the present invention in the powder feeding state;

[0019] Figure 4 This is a schematic diagram of the structure of this utility model under pressure extraction state;

[0020] Figure 5 This is a schematic diagram of the structure of the present invention in the powder feeding state;

[0021] Figure 6 This is a schematic diagram of the structure of this utility model under pressure extraction state;

[0022] Figure 7 This is a top view of the structure of this utility model in the powder feeding state;

[0023] Figure 8 This is a cross-sectional structural diagram of the present invention in the powder feeding state;

[0024] Figure 9 This is a cross-sectional structural diagram of the present invention under pressure extraction state;

[0025] Figure 10 This is a schematic diagram of the motion trajectory of the powder feeding part of this utility model;

[0026] Figure 11 This is a schematic diagram of the motion trajectory of a portion of the structure in the downward extraction state of this utility model.

[0027] Reference numerals: 1. Grinding structure; 2. Press-down extraction structure; 3. Coffee feeder structure; 4. Coffee receiving structure; 5. Two-bar linkage unit; 6. Drive unit; 7. Linkage unit; 8. Housing; 9. Press-down extraction component; 10. Guide groove; 11. Guide column; 12. Motor; 13. First drive shaft; 14. Second drive shaft; 15. Rotating rod; 16. Linkage rod; 17. Pin; 18. Linkage component; 19. Rotating shaft; 20. Rotating component; 21. 21. Extension rod; 22. First powder outlet; 23. Second powder outlet; 24. Powder outlet; 25. Powder outlet baffle; 26. Baffle shaft; 27. Torsion spring; 28. Connecting post; 29. ​​Connecting hole; 30. Contact part; 31. Rotation limiter; 32. First limit part; 33. Second limit part; 34. First limit surface; 35. Second limit surface; 36. Grinding chamber; 37. Control unit; 38. Powder receiver; 39. Powder inlet; 40. Limiting groove. Detailed Implementation

[0028] The following drawings will disclose several embodiments of this utility model. For clarity, many practical details will be described in the following description. However, it should be understood that these practical details should not be used to limit this utility model. That is, in some embodiments of this utility model, these practical details are not essential. In addition, for the sake of simplicity, some conventional structures and components will be shown in the drawings in a simple schematic manner.

[0029] It should be noted that all directional indicators in this utility model embodiment, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0030] Furthermore, in addition to indicating orientation or positional relationship, the aforementioned terms may also be used to indicate other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. For those skilled in the art, the specific meaning of these terms in this utility model can be understood according to the specific circumstances.

[0031] Furthermore, the terms "installation," "setting," "equipped with," "connection," "linking," and "socketing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral structures; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium, or internal connections between two devices, components, or parts. The connection methods described herein are existing technologies without any modifications and are common knowledge to those skilled in the art. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0032] Furthermore, in this utility model, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the utility model. They are merely used to distinguish components or operations described with the same technical terms and should not be construed as indicating or implying their relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of various embodiments can be combined with each other, but only if they are feasible for those skilled in the art. If a combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0033] like Figures 1 to 11 As shown, this utility model provides a semi-automatic coffee machine, including a grinding structure 1, a pressing extraction structure 2, a powder feeding structure 3, and a powder receiving structure 4. The pressing extraction structure 2 is provided with a two-bar linkage unit 5 for controlling the movement of the pressing extraction structure 2. A drive unit 6 for driving is connected to the two-bar linkage unit 5. The powder feeding structure 3 is connected to the pressing extraction structure 2 through a linkage unit 7. Specifically, the drive unit 6 drives the two-bar linkage unit 5 to move, the two-bar linkage unit 5 drives the pressing extraction structure 2 to move, and the pressing extraction structure 2 drives the powder feeding structure 3 to perform powder feeding movement through the linkage unit 7.

[0034] The pressure extraction structure 2 includes a housing 8, and a pressure extraction component 9 is provided inside the housing 8. At least two guide grooves 10 are provided on the inner wall of the housing 8 along the height direction of the housing 8 to guide the movement of the pressure extraction component 9. Specifically, the pressure extraction component 9 is provided with a guide post 11 along its outer edge that cooperates with the guide groove 10. The guide post 11 is located in the guide groove 10 and moves along the guide groove 10.

[0035] The drive unit 6 includes a motor 12, which is located on the outside of the housing 8 and near the top of the housing 8. A first drive shaft 13 for transmission is connected to the motor 12. Specifically, the first drive shaft 13 is inserted into the housing 8, and a second drive shaft 14 that cooperates with the linkage unit 7 is inserted near the bottom of the pressing extraction member 9.

[0036] The two-bar linkage unit 5 includes a rotating rod 15 and a linkage rod 16. One end of the rotating rod 15 is fixedly sleeved on the first transmission shaft 13, and the linkage rod 16 is arranged on both sides of the rotating rod 15. Specifically, the other end of the rotating rod 15 is connected to the ends of the linkage rods 16 on both sides through a pin 17, and the other ends of the linkage rods 16 on both sides are fixedly sleeved on the second transmission shaft 14.

[0037] The linkage unit 7 includes linkage members 18 disposed on both sides of the housing 8. Rotating shafts 19 extend from the bottom edge of the housing 8 towards the linkage members 18 on both sides, and the linkage members 18 are rotatably mounted on the rotating shafts 19. Specifically, the linkage unit 7 also includes rotating members 20 sleeved on both sides of the second transmission shaft 14. The rotating members 20 and the second transmission shaft 14 move and rotate synchronously. An extension rod 21 extends from the rotating member 20 towards the linkage member 18 and is inserted into the linkage member 18, driving the linkage member 18 to rotate around the rotating shaft 19. A limiting groove 40 is provided near the bottom of the housing 8 to limit the movement of the rotating member 20.

[0038] The powder feeding structure 3 includes a first powder outlet 22 fixedly mounted on the grinding structure 1. A second powder outlet 23 is sleeved near the tail end of the first powder outlet 22 and slides along the first powder outlet 22. Specifically, the tail end of the second powder outlet 23 is a powder outlet 24. A powder outlet baffle 25 is provided on the second powder outlet 23 near the powder outlet 24. The powder outlet baffle 25 is rotatably mounted on the second powder outlet 23 via a baffle shaft 26. A torsion spring 27 is provided on the baffle shaft 26, and the powder outlet baffle 25 rotates around the baffle shaft 26. Connecting posts 28 extend outward from both sides of the second powder outlet 23, and a connecting hole 29 that mates with the connecting post 28 is provided on the linkage 18.

[0039] The connecting hole 29 is an elongated circular hole, and the connecting post 28 is inserted into the connecting hole 29; the linkage 18 extends inward near the powder outlet baffle 25 and has a contact part 30 that cooperates with the powder outlet baffle 25. The contact part 30 is arranged at both ends of the powder outlet baffle 25. The contact part 30 abuts against the powder outlet baffle 25 and drives the powder outlet baffle 25 to rotate, thereby controlling the opening and closing of the powder outlet 24.

[0040] A rotation limiting member 31 is fixedly sleeved at the end of the first drive shaft 13 away from the motor 12. The first drive shaft 13 drives the rotation limiting member 31 to rotate synchronously. A first limiting part 32 and a second limiting part 33 are respectively arranged on both sides of the rotation limiting member 31. The first limiting part 32 and the second limiting part 33 are both fixed on the housing 8. Specifically, the first limiting part 32 and the second limiting part 33 are respectively provided with a first limiting surface 34 and a second limiting surface 35 that abut against the rotation limiting member 31. A micro switch is provided on the first limiting surface 34 and the second limiting surface 35. The micro switch is electrically connected to the motor 12.

[0041] The grinding structure 1 includes a grinding chamber 36 and a control unit 37 connected to the inside of the grinding chamber 36. The control unit 37 is located at the bottom of the grinding chamber 36. Specifically, the bottom of the grinding chamber 36 is also provided with a powder outlet, and a first powder outlet 22 is snapped onto the powder outlet. The powder outlet and the first powder outlet 22 are internally connected.

[0042] The powder receiving structure 4 includes a powder receiver 38, which has a powder receiving port 39. When the powder outlet baffle 25 leaves the powder outlet 24, the powder outlet 24 is aligned with the powder receiving port 39.

[0043] This invention is divided into three states: the original state, the powder feeding state, and the pressure extraction state. The specific working principle is as follows:

[0044] 1. In its original state, such as Figure 2 As shown;

[0045] 2. When transitioning from the original state to the powder feeding state, such as Figure 3 , 5As shown in Figures 8 and 10, motor 12 drives the first transmission shaft 13 to rotate counterclockwise. The first transmission shaft 13 drives the rotation limit member 31 to rotate counterclockwise. Simultaneously, the first transmission shaft 13 drives the rotating rod 15 to rotate counterclockwise around the first transmission shaft 13. The rotating rod 15 drives the pin 17 to rotate counterclockwise. That is, one end of the linkage rod 16 connected to the pin 17 rotates counterclockwise around the first transmission shaft 13, and the linkage rod 16 rotates clockwise. Since the other end of the linkage rod 16 is connected to the second transmission shaft 14, which is inserted into the pressing extraction member 9, the other end of the linkage rod 16 drives the second transmission shaft 14 to rotate clockwise. As the linkage 16 moves upward, the other end of the linkage rod 16 drives the second drive shaft 14 to rotate clockwise. The second drive shaft 14 drives the pressing extraction element 9 to move upward synchronously, and the guide post 11 on the pressing extraction element 9 moves upward along the guide groove 10. Since the second drive shaft 14 moves upward and rotates clockwise at the same time, the second drive shaft 14 drives the rotating element 20 to move upward and rotate clockwise around the second drive shaft 14. The extension rod 21 on the rotating element 20 drives the linkage element 18 to rotate clockwise around the rotating shaft 19. During this process, the extension rod 21 gradually inserts into the linkage element 18. The linkage element 18 rotates clockwise around the rotating shaft 19. Rotation causes the linkage 18 to move the connecting post 28 away from the grinding structure 1 via the connecting hole 29. The connecting post 28 causes the second powder outlet 23 to slide along the first powder outlet 22 away from the grinding structure 1. When the powder outlet 24 on the second powder outlet 23 moves close to the powder inlet 39, the contact part 30 on the linkage 18 rotates clockwise to approach the powder outlet baffle 25 until the contact part 30 and the powder outlet baffle 25 come into contact. The linkage 18 continues to rotate clockwise, and the contact part 30 pushes open the powder outlet baffle 25. The powder outlet baffle 25 rotates clockwise around the baffle shaft 26, exposing the powder outlet 24. The grinding process continues. Coffee powder in component 1 passes through the powder outlet, the first powder outlet 22 and the second powder outlet 23, and then falls from the powder outlet 24 into the powder receiving port 39 on the powder receiving device 38, completing the powder feeding step; at this time, the rotating component 20 moves upward to contact the inner wall of the limiting groove 40, and the outer wall of the rotating limiting component 31 and the second limiting surface 35 on the second limiting part 33 come into contact with each other. The micro switch on the second limiting surface 35 sends a signal to the motor 12, and the motor 12 starts to drive the first transmission shaft 13 to rotate in the opposite direction, that is, the motor 12 drives the first transmission shaft 13 to start rotating clockwise, and begins to press down to extract the coffee powder in the powder receiving device 38;

[0046] 3. When switching from powder feeding mode to pressure extraction mode, such as Figure 4 , 6As shown in Figures 9 and 11, motor 12 drives the first transmission shaft 13 to rotate clockwise, which in turn drives the rotation limiter 31 to rotate clockwise. Simultaneously, the first transmission shaft 13 drives the rotating rod 15 to rotate clockwise around the first transmission shaft 13, and the rotating rod 15 drives the pin 17 to rotate clockwise. That is, one end of the linkage rod 16 connected to the pin 17 rotates clockwise around the first transmission shaft 13, while the linkage rod 16 rotates counterclockwise. The other end of the linkage rod 16 drives the second transmission shaft 14 to move downwards, and simultaneously drives the other end of the linkage rod 16 to rotate counterclockwise. The second transmission shaft 14 drives the pressing extraction member 9 to move downwards synchronously, and the guide post 11 on the pressing extraction member 9 moves downwards along the guide groove 10. Since the second transmission shaft 14 moves downwards and rotates counterclockwise simultaneously, the second transmission shaft 14 drives the rotating member 20 to move downwards and rotate counterclockwise around the second transmission shaft 14. The extension rod 21 on the rotating member 20 drives the linkage member 18 to rotate counterclockwise around the rotating shaft 19. During this process, the extension rod 21 gradually extends outward from inside the linkage 18; the linkage 18 rotates counterclockwise around the rotation axis 19, and the linkage 18 drives the connecting post 28 to move closer to the grinding structure 1 through the connecting hole 29. The connecting post 28 drives the second powder outlet 23 to slide along the first powder outlet 22 towards the grinding structure 1. The contact part 30 on the linkage 18 rotates counterclockwise and drives the powder outlet baffle 25 to rotate counterclockwise around the baffle axis 26 until the powder outlet baffle 25... Blocking the powder outlet 24, the linkage 18 continues to rotate counterclockwise until the bottom surface of the pressing extraction piece 9 contacts and flattens the coffee powder in the powder receiver 38. At this time, the outer wall of the rotating limit piece 31 and the first limit surface 34 on the first limit part 32 come into contact. The micro switch on the first limit surface 34 sends a signal to the motor 12, the motor stops working, the water pump turns on, and water flows out from the bottom surface of the pressing extraction piece 9 into the powder receiver 38 to extract the coffee powder in the powder receiver 38, thus completing the pressing extraction step.

[0047] 4. When transitioning from the pressure extraction state to the initial state, the water pump shuts off, stopping water output. Motor 12 drives the first drive shaft 13 to rotate counter-clockwise until the pressure extraction element 9 rises to the desired position. Figure 2 In the initial state shown, motor 12 is stopped, allowing the user to retrieve the coffee and process the extracted coffee grounds in the powder dispenser 38. This prepares the coffee-making process for the next repetition of working principles 1 to 4.

[0048] The advantages of this utility model are as follows: the motor 12 drives the pressing extraction structure 2 to move up and down reciprocally through the two-link unit 5, and the pressing extraction structure 2 drives the powder feeding structure 3 to feed powder through the linkage unit 7, so as to realize the steps of automatic pressing extraction and powder feeding, ensuring the quality of coffee powder in the powder receiver 38 and improving the taste of coffee. In addition, the powder feeding structure 3 is provided with a powder outlet baffle 25 to block the powder outlet 24, preventing hot air and dust from entering the powder outlet channel.

[0049] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0050] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, welding, and bonding that are mature in the existing technology, and will not be described in detail here.

[0051] The above description is only a preferred embodiment of this utility model. For those skilled in the art, various modifications and variations can be made in the specific implementation and application scope based on the idea of ​​this utility model. The content of this specification should not be construed as a limitation of this utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A semi-automatic coffee machine, characterized in that: It includes a grinding structure, a pressing extraction structure, a powder feeding structure, and a powder receiving structure. The pressing extraction structure has a two-bar linkage unit for controlling its movement. The two-bar linkage unit is connected to a drive unit for driving. The powder feeding structure is connected to the pressing extraction structure through a linkage unit. The drive unit drives the two-bar linkage unit to move, which in turn drives the pressing extraction structure to move. The pressing extraction structure, through the linkage unit, drives the powder feeding structure to perform powder feeding movement.

2. A semi-automatic coffee machine according to claim 1, characterized in that: The pressure extraction structure includes a shell, a pressure extraction component is provided inside the shell, and at least two guide grooves are provided on the inner wall of the shell along the height direction of the shell for guiding the movement of the pressure extraction component. The pressure extraction component is provided with guide posts along its outer edge that cooperate with the guide grooves. The guide posts are located in the guide grooves and move along the guide grooves.

3. A semi-automatic coffee machine according to claim 2, characterized in that: The drive unit includes a motor, which is located on the outside of the housing and near the top of the housing. A first drive shaft for transmission is connected to the motor and is inserted through the housing. A second drive shaft that cooperates with the linkage unit is inserted near the bottom of the pressing extraction component.

4. A semi-automatic coffee machine according to claim 3, characterized in that: The two-bar linkage unit includes a rotating rod and a linkage rod. One end of the rotating rod is fixedly sleeved on the first drive shaft. The linkage rods are arranged on both sides of the rotating rod. The other end of the rotating rod is connected to the ends of the linkage rods on both sides through a pin. The other ends of the linkage rods on both sides are fixedly sleeved on the second drive shaft.

5. A semi-automatic coffee machine according to claim 3, characterized in that: The linkage unit includes linkage components located on both sides of the housing. Rotating shafts extend from the bottom edge of the housing towards the linkage components on both sides. The linkage components are rotatably mounted on the rotating shafts. The linkage unit also includes rotating components sleeved on both sides of the second transmission shaft. The rotating components and the second transmission shaft move and rotate synchronously. An extension rod extends from the rotating component towards the linkage component. The extension rod is inserted into the linkage component and drives the linkage component to rotate around the rotating shaft.

6. A semi-automatic coffee machine according to claim 5, characterized in that: The powder feeding structure includes a first powder outlet fixedly mounted on the grinding structure. A second powder outlet is sleeved near the tail end of the first powder outlet. The second powder outlet slides along the first powder outlet. The tail end of the second powder outlet is a powder outlet. A powder outlet baffle is provided on the second powder outlet near the powder outlet. The powder outlet baffle is rotatably mounted on the second powder outlet via a baffle shaft. A torsion spring is provided on the baffle shaft, and the powder outlet baffle rotates around the baffle shaft. Connecting posts extend outward from both sides of the second powder outlet. A connecting hole that mates with the connecting post is provided on the linkage component.

7. A semi-automatic coffee machine according to claim 6, characterized in that: The connecting hole is an elongated circular hole, and the connecting post is inserted into the connecting hole; the linkage extends inward near the powder outlet baffle and has a contact part that cooperates with the powder outlet baffle. The contact part is arranged at both ends of the powder outlet baffle. The contact part abuts against the powder outlet baffle and drives the powder outlet baffle to rotate, thereby controlling the opening and closing of the powder outlet.

8. A semi-automatic coffee machine according to claim 3, characterized in that: A rotation limiting component is fixedly sleeved at the end of the first drive shaft away from the motor. The first drive shaft drives the rotation limiting component to rotate synchronously. A first limiting part and a second limiting part are respectively arranged on both sides of the rotation limiting component. The first limiting part and the second limiting part are both fixed on the housing. The first limiting part and the second limiting part are respectively provided with a first limiting surface and a second limiting surface that abut against the rotation limiting component. A micro switch is provided on both the first limiting surface and the second limiting surface. The micro switch is electrically connected to the motor.

9. A semi-automatic coffee machine according to claim 6, characterized in that: The grinding structure includes a grinding chamber and a control unit connected to the inside of the grinding chamber. The control unit is located at the bottom of the grinding chamber, and the bottom of the grinding chamber is also provided with a powder outlet. A first powder outlet is snapped onto the powder outlet, and the powder outlet and the inside of the first powder outlet are connected.

10. A semi-automatic coffee machine according to claim 6, characterized in that: The powder receiving structure includes a powder receiver with a powder receiving port. When the powder outlet baffle leaves the powder outlet, the powder outlet aligns with the powder receiving port.

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