Brewing device of coffee machine

Abstract

The utility model relates to a brewing device of a coffee machine, which comprises an extraction unit mounted on a base, and a linear transmission module drives the extraction unit to reciprocate on the base along an axis L, so that the extraction unit has a powder receiving position and a brewing position; the extraction unit comprises a powder cup and a powder pushing seat; the powder pushing seat moves along the axis of the powder cup in the extraction cavity, so that the extraction unit has a powder receiving mode and a powder scraping mode; a guide groove is formed in the machine base, and the extraction unit has a powder receiving state with an upward opening and an extraction state; a switching assembly is arranged on the machine base, in the reset stroke of moving from the brewing position to the powder receiving position, the switching assembly makes contact with the powder pushing base or the powder cup and generates drive, and the extraction unit is switched from the powder receiving mode to the powder scraping mode. The utility model has the beneficial effects that a plurality of functions are integrated in the reciprocating motion of a single extraction unit and share one set of linear driving module, so that the required space is obviously reduced, and the miniaturization of the whole machine is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of the electric appliance equipment of espresso, especially to a brewing device of coffee machine. BACKGROUND

[0002] The full-automatic coffee machine is a kind of electric appliance that can at least realize the whole process of brewing coffee such as powder pressing, brewing and residue removing. During use, coffee powder enters the brewing chamber and is pressed into a powder cake, hot water passes through the powder cake for extraction, and the extracted powder cake is pushed out by a powder pushing structure and then scraped by a powder scraper.

[0003] With the progress of science and technology, people have more requirements for coffee machines in addition to coffee brewing, such as small size, light weight and easy operation. However, the current intelligent coffee machine needs to be respectively configured with electric drive structures for brewing chamber movement, powder pressing, exhaust, powder scraping and resetting functions. The excessive configuration of drive structures not only reduces the functional stability of the coffee machine, but also occupies a large amount of space in the coffee machine, thereby limiting the size of the coffee machine.

[0004] Chinese patent application publication No. CN117397986A provides a full-automatic brewing structure and a coffee machine. The full-automatic brewing structure includes a main body support, a brewing head and a brewing unit. The main body support includes a front side plate, a rear side plate, a left side plate, a right side plate and a top plate. The brewing head and the brewing unit are accommodated in a space enclosed by the front side plate, the rear side plate, the left side plate, the right side plate and the top plate. The front side plate is provided with an outwardly inclined powder inlet and a coffee machine. In this application, the brewing cup can move up and down under the drive of the unit seat to complete coffee brewing with the brewing head. It can also take coffee powder, compact coffee powder and clean the coffee powder cake after brewing under the drive of the cake pushing assembly, realizing efficient collaborative operation of the brewing structure and the grinding structure. At the same time, the brewing cup can be detachably installed in the brewing cup seat, which can be easily and quickly removed for thorough cleaning and maintenance, improving the delicious and healthy effect of the coffee machine.

[0005] However, in this coffee machine, the brewing cup is driven or reset by multiple push rod structures. In terms of transmission effect, the stability is poor, and the pushing process is easy to jam, resulting in transmission failure. UTILITY MODEL CONTENTS

[0006] In order to solve the above problems existing in the prior art, the utility model provides a brewing device of coffee machine.

[0007] The above problems of the utility model are solved by the following technical solutions:

[0008] A brewing device of a coffee machine, comprising an extraction unit mounted on a base, a linear transmission module driving the extraction unit to reciprocate along an axis L on the base, so that the extraction unit has a powder receiving position and a brewing position;

[0009] The extraction unit comprises a powder cup having an extraction cavity, and a powder pushing seat arranged inside the powder cup; the powder pushing seat moves along the axis of the powder cup in the extraction cavity, so that the extraction unit has a powder receiving mode and a powder scraping mode;

[0010] The base is provided with a guide groove, which comprises a first stroke groove parallel to the powder feeding direction and a second stroke groove parallel to the axis L;

[0011] The extraction unit has an upwardly open powder receiving state in the first stroke groove, and an extraction state with an opening facing the inclined direction in the second stroke groove;

[0012] The axis L is the central axis of the powder cup in the extraction state;

[0013] The base is provided with a switching assembly arranged on the side of the guide groove; in the reset stroke from the brewing position to the powder receiving position, the switching assembly is in contact with the powder pushing seat or the powder cup and generates driving force to switch the relative positions of the powder pushing seat and the powder cup, so as to switch the extraction unit from the powder receiving mode to the powder scraping mode; in the extraction stroke from the powder receiving position to the brewing position, the extraction unit pushes away or avoids the switching assembly;

[0014] The switching assembly comprises a stop block hinged to the base, which is kept in a stop position by a retaining member and can be pushed to an avoidance position by the extraction unit in the extraction stroke;

[0015] The extraction unit is further provided with a scraper, which scrapes off the powder cake exposed above the powder cup when the extraction unit is switched to the powder scraping mode.

[0016] The above technical solution is further provided as follows: the switching assembly comprises a stop block hinged to the base, and the extraction unit is provided with a pushing block on the side facing the stop block;

[0017] The powder pushing seat is provided with a transmission assembly, and the pushing block is arranged on the transmission assembly;

[0018] In the reset stroke, the pushing block is in contact with the stop block, and the stop block stops the pushing block, and the powder pushing seat is driven to move relative to the powder cup by the transmission assembly.

[0019] The above technical solution is further provided as follows: the two contact end faces of the stop block along the moving direction of the extraction unit are respectively provided as a pushing-out face and a stop face;

[0020] In the extraction stroke, the push block and the push-out surface are in contact, and the stop block is pushed out of the moving path of the push block;

[0021] In the reset stroke, the push block and the stop surface are in contact, and the stop surface generates a stop to the push block, and drives the transmission assembly to drive the pusher seat.

[0022] The further arrangement of the above technical solution is that the push-out surface is arranged as an arc surface.

[0023] The further arrangement of the above technical solution is that the switching assembly is located at the side of the first stroke groove and is close to the joint position of the first stroke groove and the second stroke groove.

[0024] The further arrangement of the above technical solution is that the transmission assembly comprises a transmission rod in which the push block is formed, and the upper end of the transmission rod is in top-holding cooperation with the bottom of the pusher seat through the transmission assembly.

[0025] The further arrangement of the above technical solution is that the transmission assembly further comprises a transmission gear and a transmission rack, the transmission rod is provided with a tooth portion, the transmission rack and the transmission rod are respectively engaged on the two sides of the transmission gear, and the transmission rack and the transmission rod have opposite movement directions on the two sides of the transmission gear.

[0026] The reset portion is arranged on the transmission rack, and the machine base is provided with a reset table in top-holding cooperation with the reset portion.

[0027] The further arrangement of the above technical solution is that the extraction unit comprises a cup rack installed on the linear transmission module, the back of the cup rack is provided with a mounting position and a guide portion, and the guide portion is slidingly arranged in the guide groove.

[0028] The further arrangement of the above technical solution is that the scraper is hingedly installed on the upper end of the powder cup and is kept in the scraping position through the elastic member, and the groove wall of the second stroke groove is provided with an avoiding portion for driving the scraper to the avoiding position.

[0029] The further arrangement of the above technical solution is that the avoiding portion is a groove arranged on the groove wall of the second stroke groove, and the groove wall of the groove is arranged as an arc-shaped driving surface.

[0030] Compared with the prior art, the coffee machine has the following beneficial effects:

[0031] By integrating the functions of grinding, powder receiving, powder pressing, extraction and powder scraping into the reciprocating motion of a single extraction unit and sharing a set of linear driving modules, the space required by multiple independent driving mechanisms in the traditional coffee machine is significantly reduced, and the whole machine is miniaturized.

[0032] The state switching of the composite track control extraction unit is achieved by using the guide groove, replacing the traditional multi-push rod structure, avoiding the risk of jamming; the gear-rack transmission assembly is linked with the reset table, ensuring the accurate reset of the powder pushing seat and improving the long-term operation reliability;

[0033] 3. By the mechanical linkage of the switching assembly and the guide groove, the full-process automation of powder receiving, extraction and powder scraping is realized: and by the cooperation of the scraper and the powder pushing seat, the powder cake is completely pushed out and scraped to the powder receiving groove, avoiding residue; the modular design of the extraction unit can be quickly disassembled and cleaned, meeting the food safety requirements. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 It is a structural schematic view of the utility model.

[0035] Figure 2 It is a structural schematic view of the extraction unit in the powder receiving position.

[0036] Figure 3 It is a structural schematic view of the extraction unit in the extraction position.

[0037] Figure 4 It is a structural schematic view of the position of the switching assembly and the push block in the reset stroke.

[0038] Figure 5 It is a structural schematic view of the position of the switching assembly and the push block in the extraction stroke.

[0039] Figure 6 It is a sectional structural schematic view of the extraction unit in the powder receiving mode.

[0040] Figure 7 It is a sectional structural schematic view of the extraction unit in the powder scraping mode.

[0041] Figure 8 It is a connection structural schematic view of the powder pushing seat and the transmission assembly.

[0042] Figure 9 It is a structural schematic view of the transmission assembly.

[0043] Figure 10 It is a structural schematic view of the machine base.

[0044] Figure 11 It is a structural schematic view of the scraper in the avoiding position.

[0045] Figure 12 It is a connection structural schematic view of the extraction unit and the linear transmission module.

[0046] The figure is marked: 1, base; 1.1, guide groove; 1.11, first stroke groove; 1.12, second stroke groove; 1.2, reset platform; 1.3, avoiding part; 1.31, driving surface; 2, grinding unit; 2.1, lower powder port; 3, brewing head; 4, extraction unit; 5, linear transmission module; 5.1, screw rod; 5.2, screw rod sleeve; 6, powder receiving groove; 700, switching assembly; 8, scraper; 8.1, driving end; 8.2, blade; 410, powder cup; 420, powder pushing seat; 421, push rod; 421.1, connecting groove; 430, cup holder; 440, transmission rod; 442, connecting shaft; 441, push block; 441.2, pushing surface; 450, transmission gear; 460, transmission rack; 470, transmission shell; 480, reset part; 490, guide part; 710, stop block; 711, pushing surface; 712, stop surface; 720, stop block seat. DETAILED DESCRIPTION

[0047] In order to further illustrate the technical means and effects adopted by the utility model to achieve the predetermined utility model purposes, the specific embodiments, structures, features and effects according to the utility model are described in detail as follows in combination with the drawings and preferred embodiments.

[0048] As shown in Figures 1-12 , the embodiment discloses a brewing device of a coffee machine.

[0049] A brewing device of a coffee machine, comprising an extraction unit 4 installed on a base 1, and a linear transmission module 5 driving the extraction unit 4 to reciprocate along an axis L on the base 1, so that the extraction unit 4 has a powder receiving position and a brewing position;

[0050] The extraction unit 4 comprises a powder cup 410 having an extraction cavity, and a powder pushing seat 420 arranged inside the powder cup 410; the powder pushing seat 420 moves along the axis of the powder cup 410 in the extraction cavity, so that the extraction unit 4 has a powder receiving mode and a powder scraping mode for ejecting the powder cake;

[0051] The base 1 is provided with a guide groove 1.1, the guide groove 1.1 comprises a first stroke groove 1.11 parallel to the powder feeding direction, and a second stroke groove 1.12 parallel to the axis L;

[0052] The extraction unit 4 has a powder receiving state with an upward opening in the first stroke groove 1.11, and an extraction state with an opening in the inclined direction in the second stroke groove;

[0053] The axis L is the central axis of the powder cup 410 in the extraction state;

[0054] The base 1 is provided with a brewing position 700, which is arranged at the side of the guide groove 1.1. In the reset stroke from the brewing position to the powder receiving position, the brewing position 700 is in contact with the powder pushing seat 420 or the powder cup 410 and generates a driving force to switch the relative positions of the powder pushing seat 420 and the powder cup 410, so as to switch the extraction unit 4 from the powder receiving mode to the powder scraping mode; in the extraction stroke from the powder receiving position to the brewing position, the extraction unit 4 pushes away or avoids the brewing position;

[0055] The switching assembly 700 comprises a stopper 710 hinged to the base 1, which is kept in a stop position by a retaining member and can be pushed to an empty position by the extraction unit 4 in the extraction stroke;

[0056] The extraction unit 4 is further provided with a scraper 8, which scrapes off the cake of coffee powder exposed above the powder cup 410 when the extraction unit 4 is switched to the powder scraping mode.

[0057] The above is the basic scheme of the embodiment.

[0058] With reference to Figure 1 and Figure 2 In the embodiment, the base 1 is further provided with a grinding unit 2, which has a grinding cavity and a lower powder outlet 2.1 communicating with the grinding cavity; and a brewing head 3, and the lower powder outlet 2.1 of the grinding unit 2 is arranged at an angle with the axis L of the brewing head 3.

[0059] The powder receiving position of the extraction unit 4 is below the lower powder outlet 2.1, and the lower powder outlet 2.1 performs powder feeding to the extraction unit 4 in a vertically downward manner; the brewing head 3 is located at the brewing position of the extraction unit 4, and the extraction state of the extraction unit 4 is that the opening direction is towards the brewing head 3; the brewing head 3 can be inserted into the extraction cavity to press the coffee powder into a cake and then brew; and the brewing head 3 has a liquid outlet channel.

[0060] When the extraction unit 4 is located at the powder receiving position and is in the powder receiving state, the extraction unit 4 is in the powder receiving mode at the same time, that is, the space with the extraction cavity in the powder cup 410 can receive coffee powder, and the opening direction of the powder cup 410 is towards the direction of the lower powder outlet 2.1, as shown in Figure 2 When the extraction unit 4 is located at the brewing position, the extraction unit 4 is below the brewing head 3, and the brewing head 3 is inserted into the powder cup 410, that is, the opening direction of the powder cup 410 is towards the direction of the brewing head 3, as shown in Figure 3 .

[0061] When the extraction unit 4 moves along the guide groove 1.1 under the action of the linear transmission module 5, the guide groove 1.1 controls the switching of the extraction unit 4 between the powder receiving state and the extraction state, that is, the linear transmission module 5 cooperates with the structure of the guide groove 1.1 to drive the extraction unit 4 to rotate.

[0062] Preferably, referring to Figure 12 In the embodiment, the linear transmission module 5 is a common screw structure in the prior art, which includes a screw rod 5.1 and a screw rod sleeve 5.2 sliding along the screw rod 5.1, and the extraction unit 4 is installed on the screw rod sleeve 5.2 and slides along the axis L with the screw rod sleeve 5.2.

[0063] The side of the machine base 1 is provided with a powder receiving groove 6 for collecting the powder cake scraped off by the scraper 8.

[0064] In the present application, the axis L is the central axis of the brewing head 3.

[0065] In use, the extraction unit 4 is in the initial state and located at the powder receiving position below the grinding unit 2, and the opening of the extraction cavity faces the lower powder outlet 2.1, and the powder pushing seat 420 is located at the bottom of the extraction cavity. The grinding unit 2 grinds the coffee beans, and the coffee powder falls into the extraction cavity of the powder cup 410 through the lower powder outlet 2.1. After grinding, the driving component starts the linear transmission module 5, and the extraction unit 4 moves along the first stroke groove 1.11 and the second stroke groove 1.12 in sequence with the screw rod sleeve 5.2. In the moving process, the guide groove 1.1 switches the state of the extraction unit 4, so that the extraction unit 4 switches from the powder receiving state to the extraction state; the extraction unit 4 moves to the brewing position in the extraction state, and the brewing head 3 extends into the extraction cavity for extraction of coffee liquid.

[0066] After extraction, the driving component is started again, the extraction unit 4 is started by the linear transmission module 5, and moves along the second stroke groove 1.12 and the first stroke groove 1.11 in sequence. In the moving process, the extraction unit 4 and the switching assembly 700 are in contact, the switching assembly 700 switches the internal state of the extraction unit 4, so that the powder pushing seat 420 moves from the powder receiving position to the powder scraping position, the upper end surface of the powder pushing seat 420 is flush with the opening of the powder cup 410, and the powder cake is pushed out to the outside of the powder cup 410, the scraper 8 scrapes the powder cake along the upper end surface of the powder cup 410, and the powder cake falls into the powder receiving groove 6 and is collected.

[0067] Preferably, in the embodiment, the driving component is a motor.

[0068] Preferably, the switching assembly 700 includes a stop block 710 hinged to the machine base 1, and the stop block 710 is provided with a retaining member, which keeps the stop block 710 in the stop position under the action of no external force, thereby stopping the extraction unit 4 in the reset stroke.

[0069] And, in the extraction stroke, the extraction unit 4 generates a pushing force to the block 710, the block 710 can overcome the force of the retaining member and rotate relative to the base 1 from the stop position to the empty position, and move out of the moving path of the extraction unit 4.

[0070] Preferably, in the embodiment, the retaining member is a torsion spring.

[0071] The extraction unit 4 is provided with a pushing block 441 on the side facing the block 710;

[0072] The pushing block 441 is arranged on the transmission assembly arranged on the pushing seat 420;

[0073] In the reset stroke, the pushing block 441 and the block 710 are in contact, and the block 710 generates a stop to the pushing block 441, and drives the pushing seat 420 to move relative to the powder cup 410 through the transmission assembly.

[0074] Specifically, referring to Figure 4 When the extraction unit 4 moves from the extraction position to the powder receiving position, the pushing block 441 is above the block 710 and moves towards the block 710; the pushing block 441 and the block 710 are in contact and generate a pushing force to the block 710, and the block 710 has a reaction force to the pushing block 441 which is opposite to the pushing force, and the reaction force generates a stop to the pushing block 441. Due to the action of the linear transmission module 5, at this time the extraction unit 4 is still in linear movement along the axis L, and the pushing block 441 generates a stop to the pushing seat 420 through the transmission assembly, so that the pushing seat 420 cannot continue to move, thus forming the relative movement between the powder cup 410 and the pushing seat 420, and the pushing seat 420 moves upwards from the bottom of the powder cup 410 until the powder cake is completely pushed out above the opening of the powder cup 410.

[0075] And in the extraction stroke, due to the special structure, the pushing force of the pushing block 441 drives the block 710 to move out of the moving path of the pushing block 441, so that the block 710 cannot generate a stop to the pushing block 441, and the extraction unit 4 can smoothly move along the guide groove 1.1.

[0076] Specifically, the two contact end surfaces of the block 710 in the moving direction of the extraction unit 4 are respectively provided as a pushing-out surface 711 and a stop surface 712;

[0077] In the extraction stroke, the pushing block 441 and the pushing-out surface 711 are in contact, and the block 710 is pushed out of the moving path of the pushing block 441;

[0078] In the reset stroke, the pushing block 441 and the stop surface 712 are in contact, and the stop surface 712 generates a stop to the pushing block 441, and drives the transmission assembly to drive the pushing seat 420.

[0079] With reference to the drawings Figure 4 and Figure 5 As shown in the drawings, the upper end face of the block 710 is a stop face 712, and the end face of the push block 441 in contact with the stop face 712 is a push face 441.2. Both the stop face 712 and the push face 441.2 are set as planes perpendicular to the moving direction of the extraction unit 4, so that the push force and the reaction force are both parallel to the moving direction of the extraction unit 4, to avoid the separation of the reaction force to drive the extraction unit 4 to rotate.

[0080] In addition, in the embodiment, the push-out face 711 of the block 710 is set as an arc face.

[0081] With reference to the drawings Figure 5 As shown in the drawings, the switching assembly 700 further comprises a block seat 720 fixed on the machine base 1, and the block 710 is hinged on the block seat 720 through a rotating shaft, and a torsion spring is sleeved on the rotating shaft to generate a torsion force on the block 710, to drive the block 710 to always be in a state of stopping in the moving path of the push block 441.

[0082] In the extraction stroke, when the push block 441 generates a push force on the block 710, the push force is directed to the center of the arc face perpendicularly to the push-out face 711 of the block 710, and the component force of the push force generates a circumferential driving action on the block 710, to drive the block 710 to rotate around the rotating shaft, so that the block 710 is turned out of the moving path of the push block 441, and the push block 441 can continue to move along the guide groove 1.1 at the position where the switching assembly 700 is passed.

[0083] Preferably, in the embodiment, the rotating shaft is parallel to the axis L.

[0084] In the embodiment, the switching assembly 700 is located at the side of the first stroke groove 1.11, and is close to the joint position of the first stroke groove 1.11 and the second stroke groove 1.12.

[0085] With reference to the drawings Figure 2 and Figure 3 As shown in the drawings, the block 710 is arranged at the side of the guide groove 1.1 and is located in the moving path of the push block 441. In the process that the extraction unit 4 moves along the first stroke groove 1.11 under the action of the linear transmission module 5, the push block 441 moves to the lower side of the block 710 and contacts the block 710 to generate a push force on the block 710, to drive the block 710 to turn out of the moving path of the push block 441.

[0086] The switching assembly 700 is arranged at the joint position of the first stroke groove 1.11 and the second stroke groove 1.12, which functions as follows: when the extraction unit 4 moves to the joint position along the second stroke groove 1.12 in the reset stroke, the block 710 acts on the push block 441 to push the pusher seat 420 out, and the powder is scraped. At the same time, the extraction unit 4 continues to move under the action of the linear transmission module 5, and the angle is switched at the joint position. That is, when the extraction unit 4 enters the first stroke groove 1.11, the state of the extraction unit 4 is switched to the powder receiving state, at this time, the push block 441 also rotates with the extraction unit 4, and the rotating direction is away from the side of the block 710, so as to separate from the block 710, and the blocking effect of the block 710 disappears, and the extraction unit 4 can continue to move along the first stroke groove 1.11 to reset.

[0087] In the embodiment, the specific implementation of the transmission assembly is arranged as follows: the transmission assembly comprises a transmission rod 440 in which the push block 441 is formed, and the upper end of the transmission rod 440 is top-holding matched with the bottom of the pusher seat 420 through the transmission assembly.

[0088] Meanwhile, in the embodiment, the transmission assembly further comprises a transmission gear 450 and a transmission rack 460, the transmission rod 440 is provided with a tooth portion, and the transmission rod 440 and the transmission rack 460 are respectively engaged on both sides of the transmission gear 450, and have opposite movement directions on both sides of the transmission gear 450.

[0089] The transmission rack 460 is provided with a reset portion 480, and the base 1 is provided with a reset table 1.2 which is top-holding matched with the reset portion 480.

[0090] Specifically referring to Figure 6 and Figure 7 , the transmission shell 470 is arranged in the extraction unit 4, the transmission assembly is located in the transmission shell 470, and the push block 441 extends to the outside of the transmission shell 470; the transmission gear 450 is arranged at the center of the transmission shell 470, and the transmission rod 440 and the transmission rack 460 are respectively engaged on both sides of the transmission gear 450.

[0091] Further, the tooth portion on the transmission rod 440 and the push block 441 are arranged on both sides of the transmission rod 440.

[0092] When the push block 441 moves upward relative to the powder cup 410 under the reaction force of the block 710, the transmission rod 440 moves upward synchronously, and drives the transmission gear 450 to rotate in the moving process, and then the transmission rack 460 engaged on the other side of the transmission gear 450 also moves, and the moving direction is opposite to that of the transmission rod 440.

[0093] Specifically referring to Figure 9As shown, when the transmission rod 440 pushes the pusher 420 to the scraping position, the transmission rack 460 is also moved to the bottom of the transmission shell 470 at the same time, at this time, the reset part 480 on the transmission rack 460 and the reset platform 1.2 on the base 1 are in contact.

[0094] After the scraping is completed, the linear transmission module 5 continues to drive the extraction unit 4, and the extraction unit 4 moves downward relative to the reset platform 1.2. During the movement, the reset part 480 is stopped by the reset platform 1.2 and cannot move downward, so that the transmission assembly moves again, the transmission rack 460 moves upward relative to the transmission shell 470, the transmission gear 450 rotates reversely, and the transmission rod 440 moves downward, thereby driving the pusher 420 to move downward relative to the powder cup 410, and switching to the brewing position.

[0095] Preferably, referring to Figure 8 As shown, in the embodiment, the pusher 420 is provided with a push rod 421 at the lower end, the end of the push rod 421 is provided with a connecting groove 421.1, the transmission rod 440 is provided with a connecting shaft 442 capable of extending into the connecting groove 421.1, so that the push rod 421 and the transmission rod 440 are connected and move synchronously.

[0096] And, referring to Figures 9-11 As shown, in the embodiment, the reset part 480 is a circular protrusion extending out of the transmission shell 470, and the reset platform 1.2 is protruded on the surface of the base 1.

[0097] In the embodiment, the extraction unit 4 includes a cup holder 430 mounted on the linear transmission module 5, the back of the cup holder 430 is provided with a mounting position and a guide part 490, and the guide part 490 is slidably arranged in the guide groove 1.1.

[0098] Specifically, referring to Figure 12 As shown, the cup holder 430 is provided with a containing groove capable of mounting the powder cup 410, the powder cup 410 is fixed in the containing groove, the lead screw sleeve 5.2 and the back of the cup holder 430 are fixed, and the cup holder 430 is driven to move. The pusher 420 is located inside the powder cup 410, and the push rod 421 on the pusher 420 extends below the cup holder 430, and the transmission shell 470 is formed on the cup holder 430. At the same time, the guide part 490 is arranged on the back of the cup holder 430 to guide the sliding direction of the cup holder 430.

[0099] Preferably, the guide part 490 is a roller capable of rotating on the back of the cup holder 430.

[0100] In the embodiment, the scraper 8 is hingedly connected to the upper end of the powder cup 410 and is kept in the scraping position by a resilient member; the wall of the second stroke groove 1.12 is provided with a retreat portion 1.3 for driving the scraper 8 to the retreat position.

[0101] Referring to Figure 9 and Figure 10 , one end of the scraper 8 is connected to the rim of the powder cup 410 by a hinge shaft, the driving end 8.1 and the blade 8.2 are located on the two sides of the hinge shaft respectively, the blade 8.2 of the scraper 8 extends above the opening of the powder cup 410, and the lower end of the blade 8.2 is as close to the opening of the powder cup 410 as possible.

[0102] When the extraction unit 4 is not in the extraction position, the blade 8.2 of the scraper 8 is always above the opening of the powder cup 410 due to the action of the resilient member; when the extraction unit 4 moves to a position close to the extraction position, the retreat portion 1.3 drives the scraper 8 to make the blade 8.2 of the scraper 8 turn outward from the opening of the powder cup 410 to the retreat position, so that the brewing head 3 can extend into the powder cup 410.

[0103] Preferably, in the embodiment, the resilient member is a torsion spring which is sleeved on the hinge shaft.

[0104] The upper end of the powder cup 410 is provided with a hinge seat, the scraper 8 is installed on the hinge seat by a pivot, and the two torsion legs of the torsion spring abut against the hinge seat and the scraper 8 respectively, so as to drive the scraper 8 to keep in the position above the opening of the powder cup 410.

[0105] Preferably, in the embodiment, the retreat portion 1.3 is a groove provided on the wall of the second stroke groove 1.12, and the groove wall is provided as an arc-shaped driving surface 1.31.

[0106] Referring to Figure 10 , the wall of the second stroke groove 1.12 close to the extraction position extends outwardly with a groove, when the extraction unit 4 moves to the position, the driving end 8.1 can extend into the groove, with the continuous movement of the extraction unit 4, the driving end 8.1 contacts the driving surface 1.31 at the upper end of the groove and is driven to rotate counterclockwise by the driving surface 1.31, so that the blade 8.2 turns out of the opening of the powder cup 410 to the retreat position.

[0107] Preferably, in the embodiment, the driving surface 1.31 is an arc-shaped surface which is the joint of the groove bottom of the groove and the end surface of the base 1, that is, the thickness of the retreat portion 1.3 gradually increases along the moving direction of the extraction unit 4, so as to push the driving end 8.1 of the scraper 8 outwardly and drive the scraper 8 to rotate counterclockwise.

[0108] Preferably, in the embodiment, the retreat portion 1.3 is arranged below the brewing head 3.

[0109] Based on the above settings, the scraper 8 needs to be turned out to the avoidance position when the brewing head 3 extends into the extraction cavity, and can be reset to rotate above the opening of the powder cup 410 when the brewing head 3 completely exits from the extraction cavity.

[0110] In other embodiments, the holding position of the scraper 8 can be arranged at the side of the opening of the powder cup 410, so that the coffee powder does not fall on the scraper 8 when the powder cup 410 is filled with powder, and the avoidance part 1.3 can drive the scraper 8 to the other side of the opening, so that the scraping range of the blade 8.2 covers the opening of the powder cup 410 when the scraper 8 is rotated, and the cake of powder above the powder cup 410 is completely scraped off.

[0111] The above is only a preferred embodiment of the present application, and does not limit the present application in any form. Although the present application has been disclosed as above with a preferred embodiment, it is not intended to limit the present application. Any person skilled in the art can make some changes or modifications to the above disclosed technical content without departing from the technical solution of the present application, and any equivalent embodiments with equivalent changes and modifications are still within the scope of the present application.

Claims

1. A brewing device of a coffee machine, comprising an extraction unit (4) mounted on a machine base (1), a linear transmission module (5) driving the extraction unit (4) to reciprocally move along an axis (L) on the machine base (1) so that the extraction unit (4) has a powder receiving position and a brewing position; the extraction unit (4) comprises a powder cup (410) having an extraction cavity, and a pusher seat (420) arranged inside the powder cup (410); the pusher seat (420) moves along an axis of the powder cup (410) in the extraction cavity so that the extraction unit (4) has a powder receiving mode and a cake scraping mode; the machine base (1) is provided with a guide groove (1.1) comprising a first stroke groove (1.11) parallel to a powder feeding direction, and a second stroke groove (1.12) parallel to the axis (L); the extraction unit (4) has an upwardly open powder receiving state in the first stroke groove (1.11), and an extraction state having an opening facing a tilt direction in the second stroke groove (1.12); the axis (L) is a central axis of the powder cup (410) in the extraction state; the machine base (1) is provided with a switching assembly (700) arranged at a side of the guide groove (1.1); in a return stroke from the brewing position to the powder receiving position, the switching assembly (700) is in contact with the pusher seat (420) or the powder cup (410) and generates a driving force to switch the relative positions of the pusher seat (420) and the powder cup (410) so as to switch the extraction unit (4) from the powder receiving mode to the cake scraping mode; in an extraction stroke from the powder receiving position to the brewing position, the extraction unit (4) pushes or avoids the switching assembly (700); the switching assembly (700) comprises a stop block (710) hinged to the machine base (1), the stop block (710) is kept in a stop position by a retaining member, and can be pushed to an avoiding position by the extraction unit (4) in the extraction stroke; the extraction unit (4) is further provided with a scraper (8), when the extraction unit (4) is switched to the cake scraping mode, the scraper (8) scrapes off a cake exposed above the powder cup (410); the extraction unit (4) is provided with a push block (441) on a side facing the stop block (710); the pusher seat (420) is provided with a transmission assembly, and the push block (441) is arranged on the transmission assembly; in the return stroke, the push block (441) is in contact with the stop block (710), and the stop block (710) stops the push block (441), and the pusher seat (420) is driven to move relative to the powder cup (410) by the transmission assembly; two contact end faces of the stop block (710) along a moving direction of the extraction unit (4) are respectively arranged as a push-out face (711) and a stop face (712); in the extraction stroke, the push block (441) is in contact with the push-out face (711), and the stop block (710) is pushed out of a moving path of the push block (441). characterized in that ​ ​ ​ ​ ​ ​ ​ 2. The brewing device of the coffee maker according to claim 1, characterized in that: ​ ​ ​ 3. The brewing device of the coffee machine according to claim 2, characterized in that: ​ ​ In the reset stroke, the push block (441) and the stop surface (712) are in contact, the stop surface (712) generates a stop to the push block (441), and the transmission assembly drives the pusher base (420).

4. The brewing device of the coffee machine according to claim 3, characterized in that: The push-out surface (711) is an arc surface.

5. A brewing device for a coffee maker according to any one of claims 1-4, characterized in that: The switching assembly (700) is located at the side of the first stroke groove (1.11) and is close to the joint position of the first stroke groove (1.11) and the second stroke groove (1.12).

6. The brewing device of the coffee maker according to claim 2, characterized in that: The transmission assembly includes a transmission rod (440) shaped with the push block (441), and the upper end of the transmission rod (440) is in top-holding cooperation with the bottom of the pusher base (420) through the transmission assembly.

7. The brewing device of the coffee machine according to claim 6, characterized in that: The transmission assembly further includes a transmission gear (450) and a transmission rack (460), the transmission rod (440) is provided with a tooth portion, and the transmission rod (440) and the transmission rack (460) are respectively engaged on both sides of the transmission gear (450) and have opposite movement directions on both sides of the transmission gear (450); The transmission rack (460) is provided with a reset portion (480), and the base (1) is provided with a reset table (1.2) in top-holding cooperation with the reset portion (480).

8. The brewing device of a coffee machine according to claim 6 or 7, characterized in that: The extraction unit (4) includes a cup holder (430) mounted on a linear transmission module (5), the back of the cup holder (430) is provided with a mounting position and a guide portion (490), and the guide portion (490) is slidingly arranged in the guide groove (1.1).

9. The brewing device of the coffee machine according to claim 8, characterized in that: The scraper (8) is hingedly mounted on the upper end of the powder cup (410) and is kept in the scraping position by an elastic member; the groove wall of the second stroke groove (1.12) is provided with an avoiding portion (1.3) for driving the scraper (8) to an avoiding position.

10. The brewing device of the coffee machine according to claim 9, characterized in that: The avoiding portion (1.3) is a groove provided on the groove wall of the second stroke groove (1.12), and the groove wall of the groove is provided as an arc-shaped driving surface (1.31).

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