Brewing device and coffee machine

Abstract

The invention relates to the technical field of coffee machines, in particular to a brewing device and a coffee machine, the brewing device comprises a base, a cover plate, a fixed material pressing barrel, a movable material pressing barrel, a filling barrel, a guide rod, a material pressing driving mechanism and a reset spring, and a mounting bin is formed between the cover plate and the base; a first bin position, a second bin position and a third bin position are sequentially arranged from one end to the other end of the mounting bin; two ends of the filler cylinder are open, and a powder inlet window is formed in the cylinder wall; the material scraping mechanism comprises a rotating rod, a scraping plate, a torsional spring, a first linkage structure and a second linkage structure; through cooperation of the first linkage structure and the second linkage structure, the movable material pressing plate moves to drive the rotating rod to rotate to achieve the material scraping action, residues on the fixed filter pressing plate and the movable filter pressing plate after the brewing operation technology are avoided, and the taste of next brewing is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee machines, and in particular to a brewer and a coffee machine. Background Art

[0002] Brewing units of piston coffee machines are known in many embodiments. Inside the brewing unit of a piston coffee machine, coffee powder is ground into a brewing chamber and compressed into a coffee cake. Then, heated water under overpressure is led through the coffee cake to extract flavoring substances from the coffee powder. When brewing is finished, the coffee cake falls into a ground cake container. However, due to the high pressure during the process of pressing the coffee powder into the coffee cake, some coffee powder will still remain on the filter press plate. The residual coffee powder will affect the efficiency of the next coffee liquid extraction and even affect the taste of the coffee brewed next time. Summary of the invention

[0003] In view of the above problems, a brewer and a coffee machine are provided, which can scrape away the residual coffee powder by arranging a scraping mechanism to ensure the taste of the next brewing.

[0004] In order to solve the problems of the prior art, the present invention provides a brewer, comprising a base, a cover plate, a fixed pressing cylinder, a movable pressing cylinder, a filling cylinder, a guide rod, a pressing drive mechanism and a reset spring, wherein an installation bin is formed between the cover plate and the base; the installation bin is sequentially divided into a first bin position, a second bin position and a third bin position from one end to the other end; both ends of the filling cylinder are open and a powder inlet window is formed on the cylinder wall;

[0005] It also includes a scraping mechanism, which includes a rotating rod, a scraper, a torsion spring, a first linkage structure and a second linkage structure;

[0006] The rotating rod is parallel to the guide rod and is rotatably arranged in the installation bin; the scraper is fixedly arranged on the rotating rod; the torsion spring is sleeved on the rotating rod, and the torsion spring is arranged to provide a torsional force for the rotating rod to twist around its axis toward the second bin position; when the first linkage mechanism is in a triggered state, it provides a force opposite to the torsional force; when the second linkage mechanism is in a triggered state, it provides a force opposite to the action of the return spring on the filling cylinder;

[0007] When the material pressing drive mechanism drives the movable material pressing cylinder to move to the third position, the second linkage mechanism is triggered and the filling cylinder is abutted and restricted in the first position;

[0008] When the movable pressing barrel is completely retracted to the third bin, the rotating rod rotates under the action of the torsional force and drives the scraper to rotate into the second bin. During the rotation of the scraper into the second bin, the residual powder on the fixed pressing barrel and the movable pressing barrel is scraped off; during the rotation of the rotating rod under the action of the torsional force, the second linkage mechanism is released and the filling barrel is released;

[0009] When the pressing drive mechanism drives the movable pressing cylinder to move from the position completely retracted to the third position toward the second position, the first linkage mechanism is triggered and drives the rotating rod to overcome the torsional force and rotate, thereby driving the scraper to withdraw from the second position. When the scraper completely withdraws from the second position, the filling cylinder withdraws to the second position under the action of the return spring.

[0010] Preferably, the movable pressing barrel has a first guide sleeve mounted on the guide rod, a pressure strip extending axially along the guide rod is fixedly provided on the guide sleeve, a stop block capable of abutting and cooperating with the pressure strip is provided on the rotating rod, and the pressure strip and the stop block constitute the first linkage structure.

[0011] Preferably, the pressure strip has a first abutment plane extending axially along the guide rod, and the abutment block has a second abutment plane; when the pressure driving mechanism drives the movable pressure cylinder to press the filling cylinder and move toward the first position, under the action of the torsional force, the second abutment plane abuts against the first abutment plane, and when the second linkage mechanism is triggered and the abutment of the filling cylinder is restricted to the first position, the second abutment plane and the first abutment plane are released from the abutment relationship.

[0012] Preferably, the abutment block has a third abutment plane, and when the scraper rotates into the second bin position, the third abutment plane abuts against the first abutment plane under the action of the torsional force.

[0013] Preferably, the abutment block has an arc-shaped transition contact surface connecting the second abutment plane and the third abutment plane, and the end of the abutment strip facing the fixed pressing rod has a contact slope. When the movable pressing cylinder moves toward the first position, the contact slope abuts against the arc-shaped transition contact surface to drive the rotating rod to overcome the torsional force and rotate in the opposite direction.

[0014] Preferably, the scraper mechanism also includes a pressure block pressed against the rotating rod, the cover plate is provided with a guide groove for accommodating the pressure block, a clamping spring is provided in the guide groove for pressing the pressure block against the rotating rod, the stuffing cylinder has a second guide sleeve sleeved on the guide rod, the second guide sleeve is provided with a lifting block, the pressure block is provided with a limit block cooperating with the lifting block, the rotating rod is provided with a protrusion cooperating with the bottom of the pressure block, the pressure block, the clamping spring, the lifting block and the protrusion constitute the second linkage structure.

[0015] Preferably, when the filling tube moves toward the first position, the lifting block contacts the limit block and overcomes the force of the compression spring to lift the pressure block, and the lifting block continues to move and passes over the pressure block, that is, the second linkage mechanism is triggered and the filling tube is abutted and restricted in the first position.

[0016] Preferably, when the rotating rod rotates under the action of the torsional force, the protrusion on the rotating rod lifts the pressing block, that is, the second linkage mechanism is released and the filling cylinder is released.

[0017] Preferably, a feeding hole is provided on the scraper, and when the filling cylinder is in the second position, the scraper is placed outside the filling cylinder and the feeding hole is opposite to the powder inlet window.

[0018] A coffee machine comprises the brewing device.

[0019] Compared with the prior art, the beneficial effects of the present invention are: through the cooperation of the first linkage structure and the second linkage structure, the movement of the movable pressing plate is used to drive the rotating rod to rotate to realize the scraping action, thereby avoiding residues on the fixed filter press plate and the movable filter press plate after the brewing operation, and ensuring the taste of the next brewing.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of a brewer of the present invention.

[0022] Figure 2 This is a schematic diagram of the three-dimensional decomposition structure of a brewing device of the present invention. Figure 1 .

[0023] Figure 3 This is a schematic diagram of the three-dimensional decomposition structure of a brewing device of the present invention. Figure 2 .

[0024] Figure 4 The three-dimensional structure diagram of a partial cross-section of a brewing device of the present invention is shown in FIG. Figure 1 .

[0025] Figure 5 The three-dimensional structure diagram of a partial cross-section of a brewing device of the present invention is shown in FIG. Figure 2 .

[0026] Figure 6 It is a top view of a brewing device of the present invention in a first working condition.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of a brewer of the present invention with a cover plate hidden in a first working condition.

[0028] Figure 8 yes Figure 6 Section view along line AA.

[0029] Fig. 9 yes Figure 6 Sectional view along line BB.

[0030] Fig.10 It is a top view of a brewing device of the present invention in a second working condition.

[0031] Fig.11 It is a schematic diagram of the three-dimensional structure of a brewer of the present invention with a cover plate hidden in a second working condition.

[0032] Fig.12 yes Fig.10 Sectional view along the CC line.

[0033] Fig.13 yes Fig.10 Sectional view along line DD.

[0034] Fig.14 It is a top view of a brewing device of the present invention in a third working condition.

[0035] Fig.15 It is a schematic diagram of the three-dimensional structure of a brewer of the present invention with the cover plate hidden in the third working condition.

[0036] Fig.16 yes Fig.14 Cross-sectional view along line EE.

[0037] Fig.17 yes Fig.14 Cross-sectional view along line FF.

[0038] Fig.18 It is a top view of a brewing device of the present invention in a fourth working condition.

[0039] Fig.19 It is a schematic diagram of the three-dimensional structure of a brewer of the present invention with the cover plate hidden in a fourth working condition.

[0040] Fig. 20 yes Fig.18 Sectional view along the GG line.

[0041] Fig.21 yes Fig.18 Sectional view along line HH.

[0042] Fig. 22 yes Fig.18 Sectional view along line JJ.

[0043] Fig.23 The three-dimensional structure of the rotating rod in the brewing device of the present invention is shown in FIG. Figure 1 .

[0044] Fig.24 The three-dimensional structure of the rotating rod in the brewing device of the present invention is shown in FIG. Figure 2 .

[0045] The numbers in the figure are: 1. base; 2. cover plate; 3. fixed pressing cylinder; 4. movable pressing cylinder; 4a. first guide sleeve; 4b. pressing strip; 5. stuffing cylinder; 5a. second guide sleeve; 5b. lifting block; 6. guide rod; 7. pressing drive mechanism; 8. return spring; 9. rotating rod; 9a. pressing block; 9a1. second abutting plane; 9a2. third abutting plane; 9a3. arc-shaped transition contact surface; 9c. protrusion; 10. scraper; 11. torsion spring; 12. pressing block; 12a. limit block; 13. pressing head; 14. ejector rod. DETAILED DESCRIPTION

[0046] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0047] See also Figures 1 to 5 The brewer shown is installed in a coffee machine for extracting coffee liquid, and comprises a base 1, a cover plate 2, a fixed pressing cylinder 3, a movable pressing cylinder 4, a filling cylinder 5, a guide rod 6, a pressing drive mechanism 7 and a return spring 8.

[0048] The base 1 is used to connect with the coffee machine, and an installation compartment is formed between the cover plate 2 and the base 1; the installation compartment is divided into a first compartment, a second compartment and a third compartment from one end to the other end.

[0049] The fixed pressing cylinder 3 is fixedly arranged in the first bin, and a fixed filter press plate is detachably mounted on the front end of the fixed pressing cylinder 3 .

[0050] The movable pressing barrel 4 is coaxially arranged in the installation bin with the fixed pressing barrel 3, and has a first guide sleeve 4a sleeved on the guide rod 6; the movable pressing barrel 4 has a pressing bin with an open front end; a pressing head 13 is movably arranged in the pressing bin, and a movable filter plate is detachably installed at the front end of the pressing head 13; the pressing head 13 is provided with a push rod 14 extending to the outside of the movable pressing barrel 4, and the outer walls of the fixed pressing barrel 3 and the pressing head 13 are sleeved with sealing rings that are sealed and connected to the inner wall of the fixed pressing barrel 3.

[0051] The filling cylinder 5 is coaxially arranged with the fixed pressing cylinder 3 in the installation bin, and has a second guide sleeve 5a sleeved on the guide rod 6; both ends of the filling cylinder 5 are open and a powder inlet window is provided on its cylinder wall, and the filling cylinder 5 has an abutting end that can abut against the front end of the movable pressing cylinder 4.

[0052] The guide rod 6 is fixedly arranged in the installation bin and is used for guiding the movable pressing cylinder 4 and the filling cylinder 5 .

[0053] The pressing drive mechanism 7 is in driving connection with the fixed pressing cylinder 3 and is used for driving the movable pressing cylinder 4 to reciprocate along its axis between the third bin position and the first bin position.

[0054] The return spring 8 is sleeved on the guide rod 6 and is used for returning the filling cylinder 5 after the brewing operation is completed; the return spring 8 abuts against the end of the second guide sleeve 5 a facing the fixed pressing cylinder 3 .

[0055] It also includes a scraper mechanism, which includes a rotating rod 9, a scraper 10, a torsion spring 11, a first linkage structure and a second linkage structure; the rotating rod 9 is parallel to the guide rod 6 and is rotatably arranged in the installation bin; the scraper 10 is fixed on the rotating rod 9; the torsion spring 11 is sleeved on the rotating rod 9, and the torsion spring 11 is configured to provide a torsional force for the rotating rod 9 to twist around its axis toward the second bin position; when the first linkage mechanism is in a triggered state, it provides a force opposite to the torsional force; when the second linkage mechanism is in a triggered state, it provides a force opposite to the action of the reset spring 8 on the filling tube 5.

[0056] When the pressing drive mechanism 7 drives the movable pressing cylinder 4 to move to the third position, the second linkage mechanism is triggered and the filling cylinder 5 is abutted and restricted in the first position.

[0057] When the movable pressing barrel 4 is completely retracted to the third position, the rotating rod 9 rotates under the action of the torsional force and drives the scraper 10 to rotate to the second position. During the rotation of the scraper 10 into the second position, the residual powder on the fixed pressing barrel 3 and the movable pressing barrel 4 is scraped off; during the rotation of the rotating rod 9 under the action of the torsional force, the second linkage mechanism is released and the filling barrel 5 is released.

[0058] When the pressing drive mechanism 7 drives the movable pressing cylinder 4 to move from the position completely retreated to the third position toward the second position, the first linkage mechanism is triggered and drives the rotating rod 9 to rotate to overcome the torsional force, thereby driving the scraper 10 to retreat from the second position. When the scraper 10 completely retreats from the second position, the filling cylinder 5 retreats to the second position under the action of the reset spring 8.

[0059] A brewing device of the present invention has the following five working conditions:

[0060] like Figure 6 - Fig. 9 In the first working condition shown, the filling cylinder 5 is at the second position, and coffee powder can enter the filling cylinder 5 through the powder inlet window on the filling cylinder 5 .

[0061] like Fig.10 - Fig.13 In the second working condition shown in FIG. 1 , the pressing drive mechanism 7 drives the movable pressing cylinder 4 to move toward the first position. During this process, the movable pressing cylinder 4 pushes the filling cylinder 5 toward the first position. The coffee powder in the filling cylinder 5 is squeezed by the movable filter press plate and the fixed filter press plate. When the filling cylinder 5 moves to the first position, the coffee powder in the filling cylinder 5 is squeezed by the movable filter press plate and the fixed filter press plate. Fig.12At the position shown, that is, at the second working position, the second linkage mechanism is triggered and the filling tube 5 is abutted and restricted in the first position.

[0062] like Fig.14 - Fig.17 In the third working state shown, the pressing drive mechanism 7 drives the movable pressing cylinder 4 to continue to move toward the first position. During this process, the movable filter press plate and the fixed filter press plate continue to squeeze the coffee powder and form a powder cake. After the powder cake is formed, the coffee powder is introduced into the brewing machine into steam and the coffee liquid is extracted. After the coffee liquid is extracted, the brewer enters the fourth working state.

[0063] like Fig.18 - Fig. 22 In the fourth working condition shown, the pressing drive mechanism 7 drives the movable pressing cylinder 4 to move toward the third position, and the front end of the pressing head 13 is exposed from the front end of the fixed pressing cylinder 3. At this time, the rotating rod 9 rotates under the action of the torsion force, and the scraper 10 rotates to the second position, and the coffee powder remaining on the fixed filter press plate and the movable filter press plate is scraped off at both ends of the scraper 10.

[0064] In the fifth working state (not shown in the figure), the material pressing driving mechanism 7 drives the movable material pressing cylinder 4 to move toward the first position, so that the brewing device of the present invention returns to the first working state. In this process, the first linkage mechanism is triggered and drives the rotating rod 9 to rotate to overcome the torsion force, thereby driving the scraper 10 to withdraw from the second position. When the scraper 10 completely withdraws from the second position, the filling cylinder 5 returns to the second position under the action of the reset spring 8.

[0065] like Figures 2 to 5 As shown, the movable pressing barrel 4 has a first guide sleeve 4a which is sleeved on the guide rod 6, on which a pressure strip 4b extending axially along the guide rod 6 is fixedly provided, and a rotating rod 9 is provided with a stop block 9a which can abut and cooperate with the pressure strip 4b, and the pressure strip 4b and the stop block 9a constitute the first linkage structure.

[0066] Specifically, the pressing strip 4b has a first abutting plane extending axially along the guide rod 6, and the abutting block 9a has a second abutting plane 9a1; when the pressing drive mechanism 7 drives the movable pressing barrel 4 to press against the filling barrel 5 and move toward the first position, under the action of the torsional force, the second abutting plane 9a1 abuts against the first abutting plane, and when the second linkage mechanism is triggered and the abutment of the pressing barrel is limited to the first position, the second abutting plane 9a1 and the first abutting plane are released from the abutting relationship. Since the abutment between the second abutting plane 9a1 and the first abutting plane is a plane-to-plane contact relationship during this process, the state of the rotating rod 9 will not change, that is, it rotates around its axis.

[0067] Furthermore, the abutment block 9a has a third abutment plane 9a2, such as Fig.19As shown, when the scraper 10 rotates to the second position, the third contact plane 9a2 contacts the first contact plane under the action of the torsion force. The rotating rod 9 is restricted to the position with the maximum rotation angle.

[0068] Furthermore, the abutment block 9a has an arc-shaped transition contact surface 9a3 connecting the second abutment plane 9a1 and the third abutment plane 9a2, and the end of the abutment strip 4b facing the fixed pressing rod has a contact slope. When the movable pressing barrel 4 moves toward the first bin position, that is, in the process of the fifth working condition returning to the first working condition, the contact slope abuts against the arc-shaped transition contact surface 9a3 to drive the rotating rod 9 to overcome the torsional force and rotate in the opposite direction, thereby finally realizing the withdrawal of the scraper 10 from the second bin position.

[0069] like Figures 2 to 5 , Fig.23 and Fig.24 As shown, the scraper mechanism also includes a pressure block 12 pressed against the rotating rod 9, the cover plate 2 is provided with a guide groove for accommodating the pressure block 12, a clamping spring is provided in the guide groove for pressing the pressure block 12 against the rotating rod 9, the stuffing cylinder 5 has a second guide sleeve 5a sleeved on the guide rod 6, the second guide sleeve 5a is provided with a lifting block 5b, the pressure block 12 is provided with a limit block 12a matched with the lifting block 5b, the rotating rod 9 is provided with a protrusion 9c matched with the bottom of the pressure block 12, the pressure block 12, the clamping spring, the lifting block 5b and the protrusion 9c constitute the second linkage structure.

[0070] Specifically, when the filling tube 5 moves toward the first position, the lifting block 5b contacts the limit block 12a and overcomes the force of the compression spring (not shown in the figure) to lift the pressure block 12, and the lifting block 5b continues to move and passes over the pressure block 12, that is, the second linkage mechanism is triggered and the filling tube 5 is abutted and restricted in the first position.

[0071] Furthermore, when the rotating rod 9 rotates under the torsion force, the protrusion 9c on the rotating rod 9 lifts the pressing block 12, that is, the second linkage mechanism is released and the pressing barrel is released. That is, while the scraper 10 is scraping, the pressing block 12 is lifted synchronously. Fig.21 As shown, after the pressing block 12 is lifted, the bottom end of the limit block 12a is higher than the top end of the lifting block 5b. At this time, under the action of the return spring 8, the lifting block 5b moves toward the second position and passes over the pressing block 12 in the opposite direction.

[0072] The scraper 10 is provided with a feeding hole. When the filling tube 5 is in the second position, the scraper 10 is placed outside the filling tube 5 and the feeding hole is directly opposite to the powder feeding window.

[0073] A coffee machine, comprising the brewer. The coffee machine equipped with the brewer is equipped with a scraping mechanism capable of scraping off the meal coffee powder on the fixed filter press plate and the movable filter press plate, which can effectively avoid the coffee powder residue on the fixed filter press plate and the movable filter press plate and ensure the taste of the next brewing.

[0074] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A brewing device, comprising a base (1), a cover plate (2), a fixed pressing cylinder (3), a movable pressing cylinder (4), a filling cylinder (5), a guide rod (6), a pressing drive mechanism (7) and a return spring (8), wherein an installation bin is formed between the cover plate (2) and the base (1); the installation bin is provided with a first bin position, a second bin position and a third bin position from one end to the other end; both ends of the filling cylinder (5) are open and a powder inlet window is provided on the cylinder wall; It is characterized in that It also includes a scraping mechanism, which includes a rotating rod (9), a scraper (10), a torsion spring (11), a first linkage structure and a second linkage structure; The rotating rod (9) is parallel to the guide rod (6) and rotatably arranged in the installation bin; the scraper (10) is fixedly arranged on the rotating rod (9); the torsion spring (11) is sleeved on the rotating rod (9), and the torsion spring (11) is arranged to provide a torsional force for twisting the rotating rod (9) around its axis toward the second bin position; when the first linkage mechanism is in a triggered state, it provides a force opposite to the torsional force; when the second linkage mechanism is in a triggered state, it provides a force opposite to the force applied by the return spring (8) to the filling cylinder (5); When the material pressing drive mechanism (7) drives the movable material pressing cylinder (4) to move toward the third position, the second linkage mechanism is triggered and the filling cylinder (5) is abutted and restricted in the first position; When the movable pressing barrel (4) is completely retracted to the third bin, the rotating rod (9) rotates under the action of the torsional force and drives the scraper (10) to rotate into the second bin. During the process of the scraper (10) rotating into the second bin, the residual powder on the fixed pressing barrel (3) and the movable pressing barrel (4) is scraped off. During the process of the rotating rod (9) rotating under the action of the torsional force, the second linkage mechanism is released and the filling barrel (5) is released. When the material pressing drive mechanism (7) drives the movable material pressing cylinder (4) to move from the position completely retracted to the third bin position toward the second bin position, the first linkage mechanism is triggered and drives the rotating rod (9) to rotate to overcome the torsional force, thereby driving the scraper (10) to withdraw from the second bin position. When the scraper (10) completely withdraws from the second bin position, the filling cylinder (5) is withdrawn to the second bin position under the action of the return spring (8).

2. A brewing device according to claim 1, characterized in that: The movable pressing barrel (4) comprises a first guide sleeve (4a) sleeved on the guide rod (6), a pressing strip (4b) extending axially along the guide rod (6) being fixedly provided on the guide sleeve, and a stop block (9a) capable of abutting and cooperating with the pressing strip (4b) being provided on the rotating rod (9), wherein the pressing strip (4b) and the stop block (9a) constitute the first linkage structure.

3. A brewing device according to claim 2, characterized in that: The pressing strip (4b) has a first abutment plane extending axially along the guide rod (6), and the abutment block (9a) has a second abutment plane (9a1); when the pressing drive mechanism (7) drives the movable pressing cylinder (4) to press against the filling cylinder (5) and move toward the first bin position, under the action of the torsional force, the second abutment plane (9a1) abuts against the first abutment plane; when the second linkage mechanism is triggered and the abutment of the filling cylinder (5) is restricted to the first bin position, the second abutment plane (9a1) releases the abutment relationship with the first abutment plane.

4. A brewing device according to claim 3, characterized in that: The abutment block (9a) has a third abutment plane (9a2), and when the scraper (10) rotates into the second bin position, the third abutment plane (9a2) abuts against the first abutment plane under the action of the torsional force.

5. The brewing device according to claim 4, characterized in that: The abutment block (9a) has an arcuate transition contact surface (9a3) connecting the second abutment plane (9a1) and the third abutment plane (9a2), and one end of the abutment strip (4b) facing the fixed pressing rod has an abutment slope, and when the movable pressing cylinder (4) moves toward the first bin position, the abutment slope abuts against the arcuate transition contact surface (9a3) to drive the rotating rod (9) to rotate in the opposite direction to overcome the torsional force.

6. The brewing device according to claim 5, characterized in that: The scraper mechanism also includes a pressure block (12) pressed against the rotating rod (9); the cover plate (2) is provided with a guide groove for accommodating the pressure block (12); a clamping spring for pressing the pressure block (12) against the rotating rod (9) is provided in the guide groove; the stuffing cylinder (5) has a second guide sleeve (5a) sleeved on the guide rod (6); the second guide sleeve (5a) is provided with a lifting block (5b); the pressure block (12) is provided with a limit block (12a) cooperating with the lifting block (5b); the rotating rod (9) is provided with a convex block (9c) cooperating with the bottom of the pressure block (12); the pressure block (12), the clamping spring, the lifting block (5b) and the convex block (9c) constitute the second linkage structure.

7. The brewing device according to claim 6, characterized in that: When the filling tube (5) moves towards the first bin position, the lifting block (5b) contacts the limiting block (12a) and overcomes the force of the compression spring to lift the pressing block (12), and the lifting block (5b) continues to move and passes over the pressing block (12), i.e., the second linkage mechanism is triggered and the filling tube (5) is abutted and restricted in the first bin position.

8. The brewing device according to claim 7, characterized in that: When the rotating rod (9) rotates under the action of the torsional force, the protrusion (9c) on the rotating rod (9) lifts the pressing block (12), that is, the second linkage mechanism is released and the filling cylinder (5) is released.

9. The brewing device according to claim 8, characterized in that: The scraper (10) is provided with a feeding hole. When the filling cylinder (5) is in the second position, the scraper (10) is placed outside the filling cylinder (5) and the feeding hole is directly opposite to the powder inlet window.

10. A coffee machine, characterized in that: The invention comprises a brewing device as described in any one of claims 1 to 9.

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