Coffee brewing device and coffee machine

Abstract

The coffee brewing device comprises a brewing cup and a brewing head arranged in the brewing cup, a filter plate is arranged at the top of the brewing head, the coffee brewing device further comprises an ejection mechanism, the ejection mechanism comprises ejector pins and an elastic piece, the ejector pins correspond to filter holes in the filter plate one to one, and the elastic piece is arranged on the ejector pins. The elastic piece is arranged on the filter plate and can move up and down relative to the filter plate to eject slag powder in the filter holes, and in the process that the ejector pins abut against the slag powder in the corresponding filter holes, the elastic piece deforms, so that the ejector pins have the tendency to recover to the initial state. Compared with the prior art, the coffee brewing device has the advantages that residue powder can be prevented from remaining in the filtering holes, the filtering holes are prevented from being blocked, the extraction effect of the coffee brewing device and the cleanliness of the machine are guaranteed, and meanwhile the use health of a user can be guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to coffee machine field especially, and it is a kind of coffee brewing device and coffee machine. BACKGROUND

[0002] Coffee brewing device is an important component in coffee machine, its function is to mix hot water and coffee powder evenly, make coffee concentration suitable, taste more smooth, in the process of brewing, hot water and coffee powder pass through the filter plate of brewing device, can reach the effect of filtering impurities, make coffee more delicious.For example, the Chinese utility model patent with patent No.ZL 202321150996.5 (authorized announcement No.CN 220275389 U) discloses a brewing device structure of coffee machine, and discloses the following contents: extrusion assembly includes brewing cup arranged on connecting rod fixed seat, brewing head is arranged in brewing cup, filter sheet is arranged above brewing head, internal water outlet channel is arranged, valve assembly is arranged in water outlet channel, two groups of circular grooves are arranged on the outer side of brewing head, sealing ring is arranged on each circular groove.

[0003] However, in the use of coffee machine, residue (coffee powder residue) is inevitably left in the filter hole of filter plate, which causes the filter hole to be blocked, affects the size and balance of brewing pressure, and coffee residue left in coffee brewing cup for a long time will deteriorate, thereby affecting the health of coffee drinkers. SUMMARY

[0004] The first technical problem to be solved by the utility model is to provide a coffee brewing device capable of avoiding the filter hole of filter plate being blocked.

[0005] The second technical problem to be solved by the utility model is to provide a coffee brewing device capable of avoiding the filter hole of filter plate being blocked and avoiding residue being left in each filter hole.

[0006] The third technical problem to be solved by the utility model is to provide a coffee machine with the above coffee brewing device.

[0007] The technical scheme adopted by the utility model to solve at least one of the above technical problems is as follows: a coffee brewing device, comprising brewing cup and brewing head arranged in the interior of the brewing cup, the top of the brewing head is provided with filter plate, characterized by further comprising ejecting mechanism, the ejecting mechanism comprises ejector pin and elastic member, wherein the ejector pin is one-to-one corresponding to the filter hole on the filter plate, and can move up and down relative to the filter plate to eject residue in each filter hole, and in the process of each ejector pin holding residue in corresponding filter hole, the elastic member deforms to make each ejector pin have the tendency to restore to initial state.

[0008] Further, each of the ejector pins is vertically arranged below the filter plate and is opposite to the corresponding filter hole,

[0009] The elastic members are return springs and correspond to the ejector pins, each return spring is sleeved on the corresponding ejector pin, and each return spring is compressed during the process that each ejector pin holds the slag powder in the corresponding filter hole upwards, so that each ejector pin has a downward resetting tendency. This is conducive to ensuring that each ejector pin smoothly ejects the slag powder left in the corresponding filter hole, and the elastic force of each return spring can ensure that each ejector pin returns to the initial state smoothly.

[0010] Further, the lower end of each of the ejector pins is provided with a protrusion protruding outward in the circumferential direction, and each return spring is clamped between the lower surface of the filter plate and the corresponding protrusion in the state that each ejector pin holds the slag powder in the corresponding filter hole upwards. On the one hand, it realizes the stable installation of each return spring on the corresponding ejector pin, and on the other hand, it enables each return spring to accumulate potential energy during the slag ejection process and release the accumulated potential energy to reset each ejector pin after the slag ejection is completed.

[0011] Further, each of the ejector pins is vertically movably arranged in the corresponding filter hole and includes a first part and a second part arranged continuously below the first part in the height direction,

[0012] In the initial state, the first part of each ejector pin is inserted into the corresponding filter hole and has a first gap between the hole wall of the filter hole for flow, and in the state that each ejector pin holds the slag powder in the corresponding filter hole, the second part of each ejector pin is embedded in the corresponding filter hole. In this way, each ejector pin does not need to be aligned with the corresponding filter hole up and down each time the slag is ejected, which not only realizes the stable assembly of each ejector pin and the filter plate, but also ensures that each ejector pin can reliably eject the slag powder in the corresponding filter hole, and the flow function of each filter hole can also be ensured by setting the first gap.

[0013] Further, the outer surface of the first part of each of the ejector pins is concave in the length direction of the first part to form a first groove, and the first gap is surrounded between each first groove and the hole wall of the filter hole. In this way, the first gap can be better formed between the first part of each ejector pin and the filter hole in the initial state, which ensures the flow property of each filter hole.

[0014] Further, in the initial state, the first gaps in each of the filter holes are arranged at intervals in the circumferential direction. The flow property of each filter hole can be better ensured by the arrangement of multiple first gaps, thereby ensuring the extraction function of the coffee maker.

[0015] Further, lower ends of the ejector pins are fixed on the first mounting surface respectively. In this way, the ejector pins can move synchronously relative to the filter plate, so that the structure of the ejecting mechanism is simple and the action of the ejector pins is easy to control.

[0016] Further, the filter plate is movably mounted on the brewing head in a vertical direction relative to the brewing head, the first mounting surface is a top surface of the brewing head, and the ejector pins are respectively accommodated in spaces between a lower surface of the filter plate and the top surface of the brewing head,

[0017] The brewing cup is provided with a connecting portion above the brewing head, and the coffee maker further comprises a driving mechanism. In the state of the coffee maker discharging dregs, the driving mechanism drives the brewing head and the filter plate to move upward synchronously relative to the brewing cup until the filter plate is detachably connected with the connecting portion, the filter plate is stopped and the brewing head continues to move upward so that the ejector pins synchronously hold dregs in the corresponding filter holes. In this way, the ejector pins can be stably arranged below the filter plate, the brewing head moves upward at the same time, and the synchronous movement of the ejector pins is realized. The filter plate is stopped by the connecting portion, so that the filter plate and the brewing head are out of synchronous movement, and the ejector pins on the brewing head and the filter plate move up and down relative to each other. The ejector pins can hold dregs in the corresponding filter holes while the brewing head moves upward to discharge dregs. The discharging of dregs and the holding of dregs are performed at the same time, so that the cleaning effect of the filter holes is improved.

[0018] Further, the connecting portion is a buckle block protruded on an inner surface of the brewing cup in a circumferential direction at intervals, or a buckle groove recessed on the inner surface of the brewing cup in a circumferential direction at intervals. Correspondingly, an outer periphery of an upper surface of the filter plate is recessed in a circumferential direction to form a buckle groove corresponding to each buckle block and allowing each buckle block to be buckled into the buckle groove, or the outer periphery of the upper surface of the filter plate is protruded in a circumferential direction to form a buckle protrusion corresponding to each buckle groove and allowing each buckle groove to be buckled into the buckle groove. In this way, the structure of the connecting portion is simple. When the brewing head and the filter plate move synchronously to form a detachable connection during discharging of dregs, the filter plate is stopped.

[0019] Further, the filter plate is provided with a connecting rod extending in a vertical direction, and a connecting hole is vertically formed in a center of the brewing head to allow the connecting rod to pass through, and a lower end of the connecting rod is limited by a limiting member and is limited upward in the connecting hole,

[0020] The driving mechanism comprises a push rod motor arranged below the brewing head, a push rod of the push rod motor vertically extends and can abut against the lower end of the connecting rod upward and downward, in the residue discharging state, the push rod motor works, the push rod abuts against the lower end of the connecting rod to push the brewing head and the filter plate to move upward synchronously, until the filter plate is connected with the connecting part, the filter plate is stopped and the brewing head continues to move upward, so that each needle moves upward relative to the corresponding filter hole. Thus, the sliding fit connection of the filter plate and the brewing head is realized through the insertion and fit of the connecting rod and the connecting channel, the filter plate can move upward synchronously with the brewing head before being connected with the limiting part through the upper limiting of the limiting piece, and when the filter plate is connected with the connecting part, the brewing head continues to move upward through the stop of the filter plate, so that each needle moves upward relative to the corresponding filter hole and pushes out the residue powder.

[0021] To further solve the third technical problem, the technical scheme adopted is: a coffee machine, characterized in that the coffee machine comprises the coffee brewing device.

[0022] Compared with the prior art, the coffee brewing device has the advantages that: the residue powder in the corresponding filter hole is pushed out through the upward and downward relative movement of each needle and the filter plate, so that the residue powder is prevented from remaining in each filter hole, each filter hole is prevented from being blocked, the extraction effect of the coffee brewing device and the cleanliness of the machine are ensured, and the health of the user is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 FIG. 1 is a structural schematic view of a coffee brewing device in an embodiment of the present application;

[0024] Figure 2 FIG. 2 is a sectional view of the coffee brewing device in the embodiment of the present application;

[0025] Figure 3 FIG. 3 is an exploded view of the coffee brewing device in the embodiment of the present application;

[0026] Figure 4 FIG. 4 is a structural schematic view of a needle in the embodiment of the present application;

[0027] Figure 5 FIG. 5 is an enlarged view of part A in FIG. 4; Figure 2

[0028] FIG. 6 is an enlarged view of part B in FIG. 4. Figure 6 Figure 3 Specifically, the coffee brewing device comprises a brewing head, a filter plate, a connecting part, a limiting part and a plurality of needles.

[0029] The present application will be further described in detail below with reference to the embodiments and the accompanying drawings.

[0030] ​​In the description of the utility model, it is understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, since the disclosed embodiments of the utility model can be arranged in different directions, so these terms indicating the direction are only as an illustration and should not be regarded as a limitation, for example, "upper", "lower" are not necessarily limited to the direction opposite or consistent with the direction of gravity. In addition, the features defined as "first", "second" can explicitly or implicitly include one or more features.

[0031] A coffee machine comprises a coffee brewer as shown in Figures 1-6 The coffee brewer comprises a brewing cup 1 and a brewing head 2 arranged inside the brewing cup 1, and the top of the brewing head 2 is provided with a filter plate 3.

[0032] Further, the coffee brewer further comprises an ejection mechanism, which comprises an ejector pin 4 and an elastic member. The ejector pin 4 corresponds to the filter hole 31 on the filter plate 3 one by one, and can move up and down relative to the filter plate 3 to eject the residue in the corresponding filter hole 31, and in the process of the ejector pin 4 holding the residue in the corresponding filter hole 31, the elastic member deforms to make the ejector pin 4 have a tendency to return to the initial state.

[0033] As can be seen from the above, the coffee brewer in the utility model ejects the residue in the corresponding filter hole 31 by the relative movement of the ejector pin 4 and the filter plate 3, thereby preventing the residue from remaining in the filter hole 31 and avoiding the filter hole 31 being blocked, so as to ensure the extraction effect of the coffee brewer and the cleanliness of the machine, and also ensure the health of the user.

[0034] Further, as shown in Figure 2 Each of the ejector pins 4 is vertically arranged below the filter plate 3 and faces the corresponding filter hole 31. The elastic member is a return spring 5 and corresponds to each of the ejector pins 4, each of the return springs 5 is sleeved on the corresponding ejector pin 4, and in the process of each of the ejector pins 4 holding the residue in the corresponding filter hole 31, each of the return springs 5 is compressed to make the corresponding ejector pin 4 have a tendency to move downward and reset. This is conducive to ensuring that each of the ejector pins 4 smoothly ejects the residue remaining in the corresponding filter hole 31, and the elastic force of each of the return springs 5 can ensure that each of the ejector pins 4 smoothly returns to the initial state.

[0035] As shown in Figure 5 , the lower end of each of the aforementioned ejector pins 4 is provided with a protrusion 43 protruding outward in the circumferential direction, and each of the ejector pins 4 holds the slag powder in the corresponding filter hole 31 upwardly, and each of the return springs 5 is clamped between the lower surface of the filter plate 3 and the corresponding protrusion 43. On the one hand, it realizes the stable installation of each of the return springs 5 on the corresponding ejector pin 4, and on the other hand, it enables each of the return springs 5 to smoothly accumulate potential energy during the slag ejection process and release the accumulated potential energy after the end of the slag ejection to reset each of the ejector pins 4.

[0036] Further, as shown in Figure 4 , Figure 5 and Figure 6 , each of the aforementioned ejector pins 4 is vertically movably arranged in the corresponding filter hole 31, and respectively includes a first portion 41 and a second portion 42 arranged continuously in the height direction. In the initial state (as shown in Figure 2 ), the first portion 41 of each of the ejector pins 4 is inserted into the corresponding filter hole 31, and a first gap 311 is left between the first portion 41 and the hole wall of the corresponding filter hole 31 for flow-through; in the state of each of the ejector pins 4 holding the slag powder in the corresponding filter hole 31, the second portion 42 of each of the ejector pins 4 is embedded in the corresponding filter hole 31. In this way, each of the ejector pins 4 does not need to be vertically aligned with the corresponding filter hole 31 each time the slag is ejected, which not only realizes the stable assembly of each of the ejector pins 4 and the filter plate 3, but also ensures that each of the ejector pins 4 can reliably eject the slag powder in the corresponding filter hole 31, and at the same time, through the setting of the first gap 311, the flow-through function of each of the filter holes 31 can also be ensured. In the present embodiment, specifically, each of the ejector pins 4 is composed of the aforementioned first portion 41 and second portion 42.

[0037] Specifically, in the present embodiment, as shown in Figure 4 , the outer surface of the first portion 41 of each of the aforementioned ejector pins 4 is concave along the length direction of the first portion 41 to form a first groove 411, and each of the first grooves 411 and the hole wall of the corresponding filter hole 31 enclose the aforementioned first gap 311. In this way, in the initial state, the first gap 311 can be better formed between the first portion 41 of each of the ejector pins 4 and the filter hole 31, ensuring the flow-through of each of the filter holes 31. Preferably, in the initial state, the first gap 311 in each of the aforementioned filter holes 31 is arranged in the circumferential direction, as shown in Figure 2 . Through the setting of multiple first gaps 311, the flow-through of each of the filter holes 31 can be better ensured, and further, the extraction function of the coffee maker can be ensured.

[0038] Preferably, the lower end of each of the aforementioned ejector pins 4 is fixed on the first mounting surface 21. In this way, each of the ejector pins 4 can move synchronously relative to the filter plate 3, so that the structure of the ejecting mechanism can be simple, and the action of each of the ejector pins 4 can be controlled conveniently. In the present embodiment, specifically, as shown in Figure 2And Figure 3 As shown in the drawings, the filter plate 3 is movably installed on the brewing head 2 in the vertical direction, the first mounting surface 21 is the top surface of the brewing head 2, and each needle 4 is accommodated in the space between the lower surface of the filter plate 3 and the top surface of the brewing head 2. The brewing cup 1 is provided with a connecting portion above the brewing head 2. Further, a driving mechanism is provided, which drives the brewing head 2 and the filter plate 3 to move upward synchronously relative to the brewing cup 1 until the filter plate 3 is detachably connected with the connecting portion, and the filter plate 3 is stopped while the brewing head 2 continues to move upward to make each needle 4 hold the residue in the corresponding filter hole 31 synchronously. Thus, each needle 4 can be stably arranged below the filter plate 3, and the brewing head 2 can move upward while each needle 4 moves upward synchronously, and the filter plate 3 is stopped by the connecting portion to make the filter plate 3 and the brewing head 2 move asynchronously, and further, each needle 4 on the brewing head 2 moves upward and downward relative to the filter plate 3, and the brewing head 2 can move upward while each needle 4 holds the residue in the corresponding filter hole 31, and the residue is removed and the residue is held simultaneously, which improves the cleaning effect of each filter hole 31.

[0039] Further, the connecting portion is a buckle block 11 which is protruded on the inner surface of the brewing cup 1 in the circumferential direction, or a buckle groove (not shown) which is recessed on the inner surface of the brewing cup 1 in the circumferential direction; correspondingly, the outer periphery of the upper surface of the filter plate 3 is recessed in the circumferential direction to form a buckle groove 32 which corresponds to each buckle block 11 and is used for each buckle block 11 to be buckled, or the outer periphery of the upper surface of the filter plate 3 is protruded in the circumferential direction to form a buckle block (not shown) which corresponds to each buckle groove and is buckled into each buckle groove. Thus, the structure of the connecting portion is simple, and the filter plate 3 is stopped when the brewing head 2 and the filter plate 3 move synchronously to form a detachable connection. Figure 2 And Figure 3 As shown in the drawings, the connecting portion is the buckle block 11 which is extended radially inward from the rim of the mouth of the brewing cup 1, the buckle block 11 is four blocks and is evenly arranged in the circumferential direction, and the upper surface of each buckle block 11 is flush with the top surface of the brewing cup 1. Correspondingly, the outer side of the upper surface of the filter plate 3 is recessed radially inward to form the buckle groove 32, and the buckle groove 32 is four and corresponds to each buckle block 11 and is used for each buckle block 11 to be buckled from top to bottom. By being arranged as above, the residue of the residue on the mouth of the brewing cup 1 can be reduced when the residue is removed, which is beneficial to ensure the cleanliness of the coffee maker.

[0040] Further, in the embodiment, the filter plate 3 is provided with a vertically extending connecting rod 6, the brewing head 2 is vertically provided with a connecting hole 22 for the connecting rod 6 to pass through, and the lower end of the connecting rod 6 is upwardly limited in the connecting hole 22 by a limiting member 7. The driving mechanism includes a push rod motor (not shown) arranged below the brewing head 2, the push rod of the push rod motor vertically extends and can abut against the lower end of the connecting rod 6. In the residue discharging state, the push rod motor works, the push rod abuts against the lower end of the connecting rod 6 to push the brewing head 2 and the filter plate 3 to synchronously move upward until the filter plate 3 is connected with the connecting portion, the filter plate 3 is stopped and the brewing head 2 continues to move upward, so that each needle 4 moves upward relative to the corresponding filter hole 31 to push out the residue in each filter hole 31. In this way, the connecting rod 6 and the connecting hole 22 are inserted and matched to realize the sliding matching connection of the filter plate 3 and the brewing head 2, the limiting member 7 is used for upward limiting to enable the filter plate 3 to synchronously move upward with the brewing head 2 before being connected with the limiting portion, and when the filter plate 3 is connected with the connecting portion, the filter plate 3 is stopped and the brewing head 2 continues to move upward, so that each needle 4 moves upward relative to the corresponding filter hole 31 to push out the residue. In the embodiment, a sealing ring 9 is arranged between the outer circumferential surface of the brewing head 2 and the inner circumferential surface of the brewing cup 1 in the circumferential direction, as shown in Figure 2 .

[0041] In the embodiment, as shown in Figure 2 , the limiting member 7 is a limiting piece clamped on the connecting rod 6 in the circumferential direction, and the limiting piece 7 abuts against the lower opening of the connecting hole 22 in the horizontal direction, thereby realizing the upward limiting of the connecting member and further realizing the upward limiting of the filter plate 3. In the embodiment, the lower end of the brewing head 2 and the lower end of the connecting rod 6 pass through the bottom of the brewing cup 1, as shown in Figure 2 , and the brewing cup 1 is vertically provided below with a guide seat 8 opposite to the connecting rod 6, the guide seat 8 is in a cylindrical shape, in the initial state, the lower end of the brewing head 2 is arranged on the top of the guide seat 8 in the circumferential direction, and the lower end of the connecting rod 6 and the limiting member 7 are located in the guide channel 81 in the center of the guide seat 8. The push rod motor is located directly below the guide seat 8, and the push rod of the push rod motor can extend into the guide channel 81 of the guide seat 8 and move up and down along the hole wall of the guide channel 81, as shown in Figure 2 .

Claims

1. A coffee maker comprising a brewing cup (1) and a brewing head (2) arranged inside the brewing cup (1), the top of the brewing head (2) being provided with a filter plate (3), characterized in that, The ejection mechanism includes ejector pins (4) and elastic members, wherein the ejector pins (4) correspond to the filter holes (31) on the filter plate (3) one by one, and can move up and down relative to the filter plate (3) to eject the residue in each filter hole (31), and in the process of each ejector pin (4) holding the residue in the corresponding filter hole (31), the elastic members deform to make each ejector pin (4) have a tendency to return to the initial state.

2. The coffee brewer of claim 1, wherein, Each of the ejector pins (4) is vertically arranged below the filter plate (3) and faces the corresponding filter hole (31), The elastic members are return springs (5) and correspond to the ejector pins (4) one by one, each return spring (5) is sleeved on the corresponding ejector pin (4), and in the process of each ejector pin (4) holding the residue in the corresponding filter hole (31), each return spring (5) is compressed to make the corresponding ejector pin (4) have a tendency to move downward and reset.

3. The coffee brewer of claim 2, wherein, The lower end of each ejector pin (4) is provided with a protrusion (43) protruding outward in the circumferential direction, and in the state of each ejector pin (4) holding the residue in the corresponding filter hole (31), each return spring (5) is clamped between the lower surface of the filter plate (3) and the corresponding protrusion (43).

4. The coffee brewer of claim 2, wherein, Each of the ejector pins (4) can move vertically in and out of the corresponding filter hole (31), and includes a first part (41) and a second part (42) arranged continuously in the height direction, In the initial state, the first part (41) of each ejector pin (4) is inserted into the corresponding filter hole (31), and a first gap (311) is left between the first part (41) and the hole wall of the corresponding filter hole (31) for fluid communication, and in the state of each ejector pin (4) holding the residue in the corresponding filter hole (31), the second part (42) of each ejector pin (4) is embedded in the corresponding filter hole (31).

5. The coffee brewer of claim 4, wherein, The outer surface of the first part (41) of each ejector pin (4) is concave in the length direction of the first part (41) to form a first groove (411), and each first groove (411) and the hole wall of the corresponding filter hole (31) form the above-mentioned first gap (311).

6. The coffee brewer of claim 4 or 5, wherein, In the initial state, the first gaps (311) in each of the filter holes (31) are arranged at intervals in the circumferential direction.

7. Coffee maker according to any of claims 2 to 5, characterized in that The lower end of each of the ejector pins (4) is fixed on the first mounting surface (21).

8. The coffee brewer of claim 7, wherein, The filter plate (3) is vertically movably mounted on the brewing head (2) relative to the brewing head (2), the first mounting surface (21) is the top surface of the brewing head (2), and each ejector pin (4) is accommodated in the space between the lower surface of the filter plate (3) and the top surface of the brewing head (2), The brewing cup (1) is provided with a connecting portion above the brewing head (2), and further includes a driving mechanism, and in the residue ejection state of the coffee brewing device, the driving mechanism drives the brewing head (2) and the filter plate (3) to move upward synchronously relative to the brewing cup (1) until the filter plate (3) is detachably connected with the connecting portion, the filter plate (3) is stopped, and the brewing head (2) continues to move upward to make each ejector pin (4) hold the residue in the corresponding filter hole (31) synchronously.

9. The coffee brewer of claim 8, wherein, The connecting part is a buckle block (11) protruded along the circumference and spaced on the inner surface of the brewing cup (1), or a buckle groove recessed along the circumference and spaced on the inner surface of the brewing cup (1), Correspondingly, the outer circumference of the upper surface of the filter plate (3) is recessed along the circumference and provided with a buckle groove (32) corresponding to each buckle block (11) and respectively for the corresponding buckle block (11) to be buckled, or the outer circumference of the upper surface of the filter plate (3) is protruded along the circumference and provided with a buckle block corresponding to each buckle groove and respectively buckled into the corresponding buckle groove.

10. The coffee brewer of claim 8, wherein, The filter plate (3) is provided with a vertically extending connecting rod (6), and the center of the brewing head (2) is vertically provided with a connecting channel (22) for the connecting rod (6) to pass through, and the lower end of the connecting rod (6) is limited in the connecting channel (22) by a limiting piece, The driving mechanism includes a push rod motor arranged below the brewing head (2), and the push rod of the push rod motor vertically extends and can abut against the lower end of the connecting rod (6) up and down. In the slag discharging state, the push rod motor works, and the push rod abuts against the lower end of the connecting rod (6) to push the brewing head (2) and the filter plate (3) to move up synchronously until the filter plate (3) is connected with the connecting part, the filter plate (3) is stopped, and the brewing head (2) continues to move up, so that each needle (4) moves up relative to the corresponding filter hole (31) to push out the slag powder in the corresponding filter hole (31).

11. A coffee maker characterized in that, The coffee brewing device comprises the coffee brewing device according to any one of claims 1-10. The coffee brewing device comprises the coffee brewing device according to any one of claims 1-10.

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