Head of brewing device of coffee machine

Abstract

A head of a brewing device of a coffee machine, aiming to solve the technical problems of poor stability, long stroke, high cost and large size of screws and gears of existing brewing head assemblies. The head of the brewing device comprises a brewing head assembly and a brewing base assembly; the brewing head assembly comprises a push rod assembly (1) and a base assembly (14); the push rod assembly (1) is arranged in the base assembly (14); raised guide ribs (1061) are symmetrically provided on the two sides of the outer diameter of a sleeve above an inner plug (102) of the push rod assembly (1); the end of each guide rib (1061) close to the inner plug (102) is a deep groove rib (1062) having the outer diameter reduced; an inner thread is provided on the inner diameter of the sleeve; at the position of a thread section (901) at one end of a screw member (9), an outer thread is connected to the inner thread of the sleeve, and a large gear (902) at the other end of the screw member (9) is engaged with one of gears of a gear assembly (12); the guide ribs (1061) on the two sides of the sleeve of the push rod assembly (1) are inserted into guide grooves (401) in the two sides of a center hole in a housing of the base assembly (14) to achieve positioning and vertical movement; and when the bent head of a hook (201) of each hook claw assembly (2) is located in the corresponding deep groove rib (1062), the hook head of the hook (201) is separated from an outer flange of a barrel opening of a brewing barrel (15).

Description

Coffee machine brewer head

[0001] Citation of relevant applications

[0002] This invention claims priority to Chinese Patent Application No. 202411516511.9, filed on October 29, 2024, entitled "Coffee Machine Brewing Head", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This invention relates to the brewing head of a coffee machine brewer, specifically a coffee machine brewing head. Background Technology

[0004] A coffee machine is a household or commercial appliance that automates the entire coffee-making process, including grinding, tamping, filling, brewing, and removing grounds. The core component of some fully automatic coffee machines is the brewing unit. This type of brewing unit is used for receiving, tamping, brewing, brewing, and removing grounds. It generally consists of two parts: a brewing barrel assembly and a brewing head assembly. The tamping and brewing mechanism is located in the brewing head assembly. When the brewing barrel assembly is on one side, it receives the coffee grounds. When the barrel of the brewing barrel assembly rotates to the brewing head assembly, it completes the tamping, brewing, brewing, and grounds removal processes. Afterward, the barrel of the brewing barrel assembly returns to the receiving side to await the next coffee grounds intake. Some existing coffee brewing devices use a large gear and screw to rotate and move up and down, such as Chinese patent application number 202410298852.7, published on May 7, 2024, entitled "Automatic Extraction and Brewing Brewing Device for Large-Dose Coffee Machine"; others use a hook-type structure design, such as Chinese patent application number 202410707362.8, published on August 2, 2024, entitled "Coffee Machine Brewing Device for Pressing Coffee Powder and Brewing". The above structures use a screw and pusher integrated into the housing to achieve locking and unlocking of the hook at the mouth of the brewing tank during up and down movement, and to seal the pusher of the screw at the mouth of the brewing tank. Pressing of coffee powder in the brewing tank is mainly achieved by the dreg discharge rod inside the brewing tank. However, the hook is kept in the locked position, which is prone to jamming, and its production and assembly are inconvenient, with high production costs and large volume. Summary of the Invention

[0005] To overcome the above-mentioned shortcomings, the purpose of this invention is to provide a coffee machine brewing head that solves the technical problems of inconvenient production and assembly, high production costs, and large size caused by poor structural design of existing similar products. In particular, the screw and gear components of similar products have poor stability, long stroke, high cost, and large size. This objective is achieved through the following technical solution.

[0006] A coffee machine brewing head includes a brewing head assembly and a brewing base assembly. The brewing head assembly includes a push rod assembly and a base assembly. The push rod assembly is disposed within the base assembly and has a liquid outlet hole. A sealing ring is provided on the outer diameter of the inner plug at one end of the push rod assembly. One side of the push rod assembly is driven to move up and down by a gear assembly and a stepper motor. Hook assemblies are symmetrically arranged on both sides of the lower part of the base assembly housing. The brewing barrel is disposed within the brewing base assembly. When the brewing barrel in the brewing base assembly rotates to one side and aligns with the push rod assembly of the brewing head assembly, the brewing barrel in the brewing base assembly is lifted by a swing rod within the brewing base assembly. The mouth of the brewing barrel abuts or aligns with the bottom end face of the base assembly housing at the brewing head assembly. At the same time, one end of the hook of the hook assembly engages with the outward flange at the mouth of the brewing barrel. Simultaneously, the stepper motor drives the push rod assembly to press down into the brewing barrel through the gear assembly to tamp the coffee grounds. A torsion spring is provided on the pin at the middle of the hook of the hook assembly. The key structural design features symmetrically protruding guide ribs on both sides of the outer diameter of the sleeve above the inner plug of the push rod assembly. One end of the inner plug of the guide rib is a deep groove rib with a narrowed outer diameter. The inner diameter of the sleeve is threaded. The external thread at one end of the screw connects to the internal thread of the sleeve. The large gear at the other end of the screw meshes with one of the gears in the gear assembly. The other end of the hook of the pawl assembly is bent inward and has bends. The hooks of the pawl assembly are secured by torsion springs. When one end of the hook opens outwards and the other end of the hook bends against the outer diameter of the push rod assembly, the guide grooves on both sides of the central hole inside the housing insert into the guide ribs on both sides of the sleeve of the push rod assembly, moving up and down for positioning. When the bend is embedded in the deep groove ribs of the guide grooves on both sides of the push rod assembly, the hook head disengages from the outer flange of the brewing barrel opening. When the push rod assembly is screwed into the brewing barrel by the action of the stepper motor, the bend is located on the guide ribs on both sides of the push rod assembly, and the hook head engages with the outer flange of the brewing barrel opening. Thus, according to the above structure, after the brewing powder is pressed and brewed in the brewing barrel, the push rod assembly returns to its initial position, the bend at the hook of the hook assembly returns to the position of the deep groove rib at the guide rib of the push rod assembly, the hook head at the hook of the hook assembly returns to the open state, the hook disengages from the outer flange of the brewing barrel opening, and the brewing barrel returns to the initial powder receiving position by the swing motor on one side of the brewing seat assembly. The aforementioned brewing base assembly may be equipped with a lees guide plate on one side of the brewing tank opening, and a powder scraper on one side of the brewing head assembly above the brewing tank opening at the powder receiving position. The brewing head assembly and the brewing base assembly may be integrated via an outer diameter connecting plate. Additionally, if necessary, the symmetrically arranged hook assemblies on both sides of the lower part of the base assembly housing may be omitted, allowing the corresponding components to be combined for use as a brewing head assembly.

[0007] The push rod assembly includes an inner plug head, a spring, an inner fixed sleeve, and an inner threaded sleeve. The inner fixed sleeve and the inner threaded sleeve constitute the sleeve. The inner fixed sleeve is disposed inside the inner threaded sleeve with a gap between them. The inner diameter of the inner threaded sleeve has an internal thread. The external thread of the threaded section of the screw is connected to the internal thread of the inner threaded sleeve. The end face of the sleeve at the connection between the inner fixed sleeve and the inner threaded sleeve is connected to the other end of the inner plug head by a screw and a central screw. The spring is provided at the connection. The end face of the inner plug head is provided with a filter screen. A first micro switch is provided on one side of the central screw in the inner cavity of the inner fixed sleeve. When the push rod assembly presses down on the coffee powder in the brewing tank, the spring deforms, and the inner plug head triggers the second micro switch through the central screw.

[0008] The inner threaded sleeve of the push rod assembly inside the housing has a protruding rib on one side of its outer diameter. A second micro switch is provided inside the housing corresponding to the protruding rib. The second micro switch is set inside the housing through a micro switch bracket. When the push rod assembly moves to the powder pressing and / or opens the hook assembly, the push rod assembly triggers the first micro switch.

[0009] The push rod assembly has wing grooves on both sides of the deep groove rib at the internal threaded sleeve. The wing grooves are integrated with the flat key edges on both sides of the guide rib of the internal threaded sleeve. The flat key edges of the internal threaded sleeve move up and down corresponding to the guide groove inside the housing. The other end of the hook of the claw assembly has a roller. The outer diameter or groove of the roller abuts against the guide rib of the push rod assembly and rolls as it moves up and down. Thus, the roller further limits the movement while stabilizing the transition between the guide rib and the deep groove rib.

[0010] The brewing barrel has a square-shaped outward-flared rim. Symmetrically arranged upward-sloping grooves are provided on both sides of the bottom of this rim. The shape of these grooves corresponds to the shape of the hook head on the hook assembly, and the hook head of the hook assembly has a corresponding arc-shaped edge at its end. This structure increases the contact area between the hook head and the outward-flared rim of the brewing barrel, and also improves the shape of the grooves, resulting in better stability when the two are engaged.

[0011] The brewing barrel is provided with symmetrical limiting posts on both sides of the outer diameter below the outer groove. When the brewing barrel is lifted by the swing rod in the brewing seat assembly and engaged with the hook head at the hook of the hook assembly, the limiting posts of the brewing barrel abut against the top shell opening of the outer shell of the brewing seat assembly for limiting.

[0012] The large gear of the screw assembly inside the housing is provided with a first bearing and a second bearing in the upper and lower grooves, respectively. A washer is provided on the end face of the step below the outer boss of the push rod assembly at the bottom of the housing. The hook of the pawl assembly swings out of the opening on one side of the boss at the step of the housing. The above structure improves the stability of the gear assembly rotating inside the housing and the sealing of the bottom end face of the housing during installation.

[0013] The housing includes a base, a cover, and a top cover. The base, cover, and top cover are sequentially connected and integrated via end screws and nuts. A first bearing is encapsulated within the housing through the top cover. One side of a gear assembly at the connection between the base and cover is aligned with an opening in the base and cover. The outer diameter of the base on the opening side is provided with the gear assembly and a stepper motor. The stepper motor is mounted on a motor mount on one side of the base. The motor shaft of the stepper motor is connected to the first gear of the gear assembly. One side of the first gear meshes with one side of the second gear, and the other side of the second gear extends into the housing and meshes with the second gear of the gear assembly. The claw assemblies are respectively located in the slots on both sides of the bottom boss of the base. The above is a specific structural embodiment of the housing. Other structural forms can also be adopted to facilitate the installation of the stepper motor, gear assembly, claw assembly, and push rod assembly.

[0014] When the stepper motor drives the pusher assembly to press the powder into the brewing tank via the gear assembly, the slag discharge rod at the bottom of the brewing tank drives the pusher assembly to move via a transmission motor on one side of the brewing seat assembly. The above structure is designed so that the slag discharge rod, in conjunction with the pusher assembly, moves upward to further press the powder, resulting in better powder pressing effect. It can also achieve powder pressing by pushing the pusher assembly alone, and the slag discharge rod can also be used only for starting during slag discharge.

[0015] The brewing head assembly has two symmetrical liquid outlets inside the push rod assembly, which are American coffee outlet and Italian coffee outlet respectively.

[0016] This invention features a reasonable structural design, diverse structural forms, convenient production and assembly, small size, and low cost. In particular, it exhibits good stability when the brewing barrel is hooked in the tamping state. It is suitable for use as a brewing head in coffee machines and for further improvement of similar products. Attached Figure Description

[0017] Figure 1 is a partial exploded structural diagram of the present invention.

[0018] Figure 2 is a schematic diagram of the internal structure of the shell in Figure 1.

[0019] Figure 3 is a schematic diagram of the bottom three-dimensional structure after assembly as shown in Figure 1.

[0020] Figure 4 is a schematic diagram of the internal structure of the push rod assembly in Figure 1. The dashed lines in the figure represent the internal structure.

[0021] Figure 5 is a schematic diagram of the exploded structure of the push rod assembly in Figure 1.

[0022] Figure 6 is a schematic diagram of the assembled cross-sectional structure of Figure 1.

[0023] Figure 7 is a schematic diagram of the internal structure of the assembled shell in Figure 1. The dashed lines in the figure represent the shell structure.

[0024] Figure 8 is a schematic diagram of the assembled bottom and brewing barrel structure of Figure 1 in use. Part A is framed in the figure, and the brewing base assembly is omitted.

[0025] Figure 9 is an enlarged structural diagram of part A in Figure 8.

[0026] Attached Figures and Their Names: 1. Push Rod Assembly; 101. Filter Screen; 102. Inner Plug; 103. Sealing Ring; 104. Spring; 105. Inner Fixing Sleeve; 106. Inner Threaded Sleeve; 1061. Guide Rib; 1062. Deep Groove Rib; 1603. Protruding Rib; 107. First Micro Switch; 2. Claw Assembly; 201. Hook; 202. Torsion Spring; 203. Roller; 3. Washer; 4. Housing Base; 401. Guide Groove; 5. Micro Switch Support; 6. Second Micro Switch; 7. Housing Cover; 8. First Bearing; 9. Screw; 901. Threaded Section; 902. Large Gear; 10. Second Bearing; 11. Top Cover; 12. Gear Assembly; 13. Stepper Motor; 14. Base Assembly; 15. Brewing Barrel; 1501. Outer Groove. Detailed Implementation

[0027] The structure and use of the present invention will now be further described with reference to the accompanying drawings. As shown in Figures 1-9, the brewing machine head includes a brewing head assembly and a brewing base assembly. The brewing head assembly includes a push rod assembly 1 and a base assembly 14. The push rod assembly is disposed within the base assembly and has a liquid outlet hole. A sealing ring 103 is provided on the outer diameter of the inner plug 102 at one end of the push rod assembly. The push rod assembly is driven to move up and down on one side by a gear assembly 12 and a stepper motor 13. Hook assemblies 2 are symmetrically arranged on both sides of the lower part of the housing of the base assembly. The brewing tank 15 is disposed within the brewing base assembly. Brewing takes place within the brewing base assembly. When the barrel rotates to one side and aligns with the push rod assembly of the brewing head assembly, the brewing barrel inside the brewing seat assembly is lifted by the swing rod inside the brewing seat assembly. The mouth of the brewing barrel abuts or aligns with the bottom end face of the housing of the machine base assembly at the brewing head assembly. At the same time, one end of the hook 201 of the hook assembly engages with the outward flange at the mouth of the brewing barrel. The stepper motor drives the push rod assembly to press down into the brewing barrel through the gear assembly to achieve powder pressing. The pin in the middle of the hook of the hook assembly is equipped with a torsion spring 202, and the other end of the hook of the hook assembly is equipped with a roller 203. The aforementioned push rod assembly has symmetrically protruding guide ribs 1061 on both sides of the outer diameter of the sleeve above the inner plug head. One end of the guide rib is a deep groove rib 1062 with a narrowed outer diameter. The inner diameter of the sleeve is provided with internal threads. The external thread at the threaded section 901 at one end of the screw member 9 connects with the internal thread of the sleeve. The large gear 902 at the other end of the screw member meshes with one of the gears in the gear assembly. The other end of the hook of the pawl assembly is bent inward and has bends. The hooks of the pawl assembly are respectively connected by torsion springs. With one end of the hook open outwards and the other end of the hook bent against the outer diameter of the push rod assembly, the guide grooves 401 on both sides of the central hole inside the housing are inserted into the guide ribs on both sides of the sleeve of the push rod assembly and move up and down for positioning. When the bent end is embedded in the deep groove ribs of the guide grooves on both sides of the push rod assembly, the hook head disengages from the outer flange of the brewing barrel opening. When the push rod assembly is screwed into the brewing barrel by the action of the stepper motor, the bent end is located on the guide ribs on both sides of the push rod assembly, and the hook head engages with the outer flange of the brewing barrel opening.

[0028] Its specific structure is as follows: The push rod assembly includes an inner plug head, a spring 104, an inner fixed sleeve 105, and an inner threaded sleeve 106. The inner fixed sleeve and the inner threaded sleeve constitute the sleeve. The inner fixed sleeve is disposed inside the inner threaded sleeve and there is a gap between them. The inner diameter of the inner threaded sleeve is provided with an internal thread. The external thread of the threaded section of the screw is connected to the internal thread of the inner threaded sleeve. The end face of the sleeve at the connection between the inner fixed sleeve and the inner threaded sleeve is connected to the other end of the inner plug head by a screw and a central screw. The spring is provided at the connection. The end face of the inner plug head is provided with a filter screen 101. A first micro switch 107 is provided on one side of the central screw in the inner cavity of the inner fixed sleeve. When the push rod assembly presses down on the coffee powder in the brewing barrel, the spring deforms, and the inner plug head triggers the first micro switch through the central screw. The push rod assembly has wing grooves on both sides of the deep groove rib at the internal threaded sleeve. The wing grooves are integrated with the flat key edges on both sides of the guide rib of the internal threaded sleeve. The flat key edges of the internal threaded sleeve move up and down corresponding to the guide groove in the housing. The outer diameter of the roller abuts against the guide rib of the push rod assembly and rolls when moving up and down. Alternatively, the outer diameter of the roller has a groove. The groove on the outer diameter of the roller abuts against the guide rib of the push rod assembly and rolls when moving up and down, thereby further improving the stability of the roller. A protruding rib 1603 is provided on one side of the outer diameter of the internal threaded sleeve of the push rod assembly in the housing. A second micro switch 6 is provided in the housing corresponding to the protruding rib. The second micro switch is set in the housing through a micro switch bracket 5. When the push rod assembly moves to the powder pressing and / or opens the hook assembly, the push rod assembly triggers the second micro switch.

[0029] The outer flange of the brewing barrel is square. Symmetrically, upward-sloping grooves 1501 are provided on both sides of the bottom of the outer flange of the brewing barrel. The shape of the outer grooves corresponds to the shape of the hook head of the hook assembly, and the end of the hook head of the hook assembly has a corresponding arc-shaped edge. Furthermore, symmetrical limiting posts are provided on both sides of the outer diameter below the outer groove of the brewing barrel. When the brewing barrel is lifted by the swing rod in the brewing seat assembly and engages with the hook head of the hook assembly, the limiting posts of the brewing barrel abut against the top opening of the outer shell of the brewing seat assembly. The upper and lower grooves of the large gear in the screw assembly inside the shell are respectively provided with a first bearing 8 and a second bearing 10. A washer 3 is provided on the end face of the step below the outer boss of the push rod assembly at the bottom of the shell. The hook of the hook assembly swings out of the opening on one side of the boss at the step of the shell. The housing includes a housing base 4, a housing cover 7, and a top cover 11. The housing base, housing cover, and top cover are connected in sequence and integrated by screws and nuts at the end corners. The first bearing is encapsulated in the housing through the top cover. One side of the gear assembly in the connection between the housing base and the housing cover is aligned with the openings in the housing base and the housing cover. The outer diameter of the housing base on the side of the opening is provided with a gear assembly and a stepper motor. The stepper motor is set in a motor mount on one side of the housing base. The motor shaft of the stepper motor is connected to the first gear of the gear assembly. One side of the first gear of the gear assembly meshes with one side of the second gear. The other side of the second gear extends into the housing and meshes with the second gear of the gear assembly. The claw assembly is provided in the slots on both sides of the opening of the bottom boss of the housing base.

[0030] The aforementioned brewing head assembly has one or two symmetrical liquid outlet holes inside the push rod assembly, namely an American coffee outlet hole and an Italian coffee outlet hole.

[0031] The specific operation of the brewing machine head in the powder receiving, tamping, and flaking states is as follows: In the powder receiving state, after the oscillating motor on one side of the outer diameter of the brewing seat assembly is powered on, it drives the brewing barrel of the brewing seat assembly back to its original position, with the opening of the brewing barrel vertically upward and aligned with the powder receiving port inside the coffee machine; at the same time, after the drive motor on the other side of the outer diameter of the brewing seat assembly is powered on, it drives the flaking rod of the brewing seat assembly back to its original position, creating an open cavity inside the brewing barrel to wait for powder to be received, and then completing the powder receiving action. In the tamping and brewing process, the oscillating motor, when powered on, moves the brewing barrel of the brewing seat assembly to the side of the brewing head assembly. The opening of the brewing barrel is vertically aligned with the push rod assembly, and the brewing barrel is raised. The stepper motor, through the gear assembly and screw component, drives the push rod assembly to move downward, so that the push rod assembly fits into the brewing barrel. At the same time, the push rod assembly drives the hook of the hook assembly to swing, and the hook head engages with the outer edge of the brewing barrel opening. At this time, the chaff discharge rod inside the brewing barrel of the brewing seat assembly moves upward, and the coffee powder inside the brewing barrel is formed into a coffee pouch. Then, it waits for hot water from the boiler in the coffee machine to extract and brew the coffee. In the churning state, when the stepper motor drives the push rod assembly to move upward and reset, the hook of the claw assembly swings back to reset and disengages from the outer flange of the brewing barrel. The swing motor drives the brewing barrel of the brewing seat assembly, and after the drive motor is powered on, it drives the churning rod inside the brewing barrel of the brewing seat assembly to push the coffee grounds out of the brewing barrel. The coffee grounds fall out from the pouring plate, completing the churning action, and waiting for the next coffee grounds receiving and tamping operation.

[0032] The above description is intended to illustrate the technical means of the present invention and is not intended to limit the scope of the invention. Any obvious improvements or substitutions made to the present invention by those skilled in the art based on existing common knowledge also fall within the protection scope of the claims of the present invention. For example, the hook assembly can be omitted, and the push rod assembly can be disposed within a housing with a screw component and used as the brewing machine head.

Claims

1. A coffee machine brewing head, comprising a brewing head assembly and a brewing base assembly, wherein the brewing head assembly comprises a push rod assembly (1) and a base assembly (14), the push rod assembly being disposed within the base assembly, the push rod assembly having a liquid outlet hole, a sealing ring (103) being provided on the outer diameter of the inner plug (102) at one end of the push rod assembly, the push rod assembly being driven to move up and down on one side by a gear assembly (12) and a stepper motor (13), and symmetrically provided claw assemblies (2) on both sides below the housing of the base assembly, and a brewing tank (15) being disposed within the brewing base assembly. Inside the brewing assembly; when the brewing barrel inside the brewing assembly rotates to one side and aligns with the push rod assembly of the brewing head assembly, the brewing barrel inside the brewing assembly is lifted by the swing rod inside the brewing assembly, and the mouth of the brewing barrel abuts or aligns with the bottom end face of the housing of the machine base assembly at the brewing head assembly. At the same time, one end of the hook (201) of the hook assembly engages with the outward flange at the mouth of the brewing barrel, and the stepper motor drives the push rod assembly to press down into the brewing barrel through the gear assembly to achieve powder pressing. The pin shaft in the middle of the hook of the hook assembly is provided with torsion springs (202); characterized in that The push rod assembly (1) has symmetrically protruding guide ribs (1061) on both sides of the outer diameter of the sleeve above the inner plug (102). One end of the inner plug of the guide rib is a deep groove rib (1062) with a narrowed outer diameter. The inner diameter of the sleeve is provided with internal threads. The external thread at the threaded section (901) at one end of the screw (9) is connected to the internal thread of the sleeve. The large gear (902) at the other end of the screw meshes with one of the gears in the gear assembly (12). The other end of the hook (201) of the claw assembly (2) is bent inward and has bends. The hook of the claw assembly... The hook head is kept open outward by the action of torsion spring (202), and the other end of the hook head abuts against the outer diameter of the push rod assembly. At the same time, the guide grooves (401) on both sides of the central hole in the housing are inserted into the guide ribs on both sides of the sleeve of the push rod assembly and move up and down for positioning. When the hook head is embedded in the deep groove ribs of the guide grooves on both sides of the push rod assembly, the hook head of the hook is disengaged from the outer flange of the barrel opening of the brewing barrel (15). When the push rod assembly is screwed into the brewing barrel by the action of stepper motor (13), the hook head is located on the guide ribs on both sides of the push rod assembly, and the hook head of the hook is engaged with the outer flange of the barrel opening of the brewing barrel.

2. The coffee machine brewing head according to claim 1, characterized in that... The push rod assembly (1) includes an inner plug head (102), a spring (104), an inner fixing sleeve (105), and an inner threaded sleeve (106). The inner fixing sleeve and the inner threaded sleeve constitute the sleeve. The inner fixing sleeve is disposed inside the inner threaded sleeve and there is a gap between them. The inner diameter of the inner threaded sleeve is provided with an internal thread. The external thread of the threaded section (901) of the screw member (9) is connected to the internal thread of the inner threaded sleeve. The end face of the sleeve at the connection between the inner fixing sleeve and the inner threaded sleeve is connected to the other end of the inner plug head by a screw and a central screw. The spring is provided at the connection. The end face of the inner plug head is provided with a filter screen (101). A first micro switch (107) is provided on one side of the central screw in the inner cavity of the inner fixing sleeve. When the push rod assembly presses down on the coffee powder in the brewing barrel, the spring deforms and the inner plug head triggers the first micro switch through the central screw.

3. The coffee machine brewing head according to claim 2, characterized in that... The inner threaded sleeve (106) of the push rod assembly (1) inside the housing is provided with a protruding rib (1603) on one side of the outer diameter. A second micro switch (6) is provided in the housing corresponding to the protruding rib. The second micro switch is set in the housing through a micro switch bracket (5). When the push rod assembly moves to the powder pressing and / or opens the claw assembly (2), the push rod assembly triggers the second micro switch.

4. The coffee machine brewing head according to claim 2, characterized in that... The push rod assembly (1) has wing grooves on both sides of the deep groove rib (1062) at the inner threaded sleeve (106). The wing grooves are connected to the flat key edges on both sides of the guide rib (1601) of the inner threaded sleeve. The flat key edges of the inner threaded sleeve move up and down corresponding to the guide groove (401) in the housing. The hook (201) of the claw assembly (2) has a roller (203) at the other end of the hook (201). The outer diameter or the groove at the outer diameter of the roller abuts against the guide rib of the push rod assembly (1) and is rolled when moving up and down.

5. The coffee machine brewing head according to claim 1, characterized in that... The outer edge of the brewing barrel (15) is square. The bottom sides of the outer edge of the brewing barrel are symmetrically provided with an upwardly inclined outer groove (1501). The shape of the outer groove of the brewing barrel corresponds to the hook head shape of the hook (201) of the hook assembly (2). The end of the hook head of the hook assembly is provided with a corresponding arc edge.

6. The coffee machine brewing head according to claim 5, characterized in that... The outer groove (1501) of the brewing barrel (15) is provided with symmetrical limiting posts on both sides of the outer diameter below. When the brewing barrel is lifted by the swing rod in the brewing seat assembly and engaged with the hook head at the hook (201) of the hook assembly (2), the limiting post of the brewing barrel abuts against the top shell opening of the outer shell of the brewing seat assembly for limitation.

7. The coffee machine brewing head according to claim 1, characterized in that... The large gear (902) of the screw component (9) inside the housing is provided with a first bearing (8) and a second bearing (10) in the upper and lower grooves respectively. A washer (3) is provided on the end face of the step below the outer boss of the push rod assembly (1) at the bottom of the housing. The hook (201) of the claw assembly (2) swings out of the opening on one side of the boss at the step of the housing.

8. The coffee machine brewing head according to claim 7, characterized in that... The housing includes a housing base (4), a housing cover (7), and a top cover (11). The housing base, housing cover, and top cover are connected in sequence and connected as a whole by screws and nuts at the end corners. At the same time, the first bearing (8) is encapsulated in the housing through the top cover. One side of the gear assembly (12) in the connection between the housing base and the housing cover is aligned with the opening at the housing base and the housing cover. The outer diameter of the housing base on the side of the opening is provided with a gear assembly and a stepper motor (13). The stepper motor is set in the motor base on one side of the housing base. The motor shaft of the stepper motor is connected to the first gear of the gear assembly. One side of the first gear of the gear assembly meshes with one side of the second gear. The other side of the second gear extends into the housing and meshes with the second gear of the gear assembly. The claw assembly (2) is provided in the slots of the openings on both sides of the bottom boss of the housing base.

9. The coffee machine brewing head according to claim 1, characterized in that... When the stepper motor (13) drives the push rod assembly (1) to press the powder into the brewing tank (15) through the gear assembly (12), the bottom slag discharge rod in the brewing tank drives the push rod assembly to move through the transmission motor on one side of the brewing seat assembly.

10. The coffee machine brewing head according to claim 1, characterized in that... The symmetrically arranged claw assemblies (2) on both sides of the lower part of the housing of the base assembly (14) are omitted.

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