Brewing head automatic locking structure and pressure coffee machine

Abstract

The utility model provides an automatic locking structure of a brewing head and a pressure coffee maker, and the automatic locking structure of the brewing head comprises a brewing head seat provided with a brewing opening; the powder bowl part comprises a powder bowl piece matched with the brewing opening; the pressing part is arranged on the brewing head seat and comprises a brewing head unit matched with the powder bowl piece and a driving assembly used for pressing the brewing head unit to the powder bowl piece. According to the automatic locking structure of the brewing head, the powder bowl piece is placed in the brewing opening, the brewing head unit is pressed to the powder bowl piece through the driving assembly, and therefore sealing of the brewing cavity is achieved, the automation degree is high, the operation that a user manually aligns the positioning clamping teeth and manually screws the powder bowl part to the brewing head base is avoided, time and labor are saved, and the brewing efficiency is improved. And the use experience of the user is improved. The coffee machine solves the problems that a user needs to manually align a positioning latch and time and labor are wasted when a powder bowl part is manually screwed to a powder bowl support in a traditional coffee machine.

Description

Technical Field

[0001] This utility model relates to the technical field of household appliances, and more specifically, to an automatic locking structure for the brewing head and a pressure coffee machine. Background Technology

[0002] With the improvement of living standards, coffee has gradually become a common beverage in people's lives. Due to the fast pace of life, coffee machines that can quickly brew coffee are increasingly popular. Most existing espresso machines grind coffee into powder, place it in a container, and then extract the coffee liquid through high-temperature steam. This method of extraction requires grinding and loading the coffee powder, which is inefficient and time-consuming, making it difficult to meet the needs of modern life.

[0003] However, traditional coffee machines on the market generally require manual tightening by the user. First, the portafilter assembly is placed under the portafilter holder, aligned with the rotation angle, and then tightened to lock it onto the holder. This method is difficult, relying entirely on feel and habit. Traditional portafilters have 3-5 teeth, requiring novice or inexperienced users to manually align these teeth, making it difficult to align the rotation angle. Furthermore, manual tightening is necessary after alignment to seal the brewing chamber. In addition, the pressure sealing standard for the brewing chamber (where coffee grounds are placed) of pressure coffee machines is generally 17 Bar. To ensure a tight seal, the portafilter assembly and brewing head must be pressed very tightly, resulting in a large amount of force required to screw the portafilter in, leading to a poor user experience. Utility Model Content

[0004] Based on this, in order to solve the problem that traditional coffee machines require users to manually align the positioning teeth and manually tighten the portafilter assembly to the portafilter holder, which is time-consuming and laborious, this utility model provides an automatic brewing head locking structure and a pressure coffee machine, the specific technical solution of which is as follows:

[0005] On one hand, an automatic locking structure for a brewing head includes:

[0006] The brewing head base is equipped with a brewing spout;

[0007] The powder bowl component includes a powder bowl piece adapted to the brewing spout;

[0008] A pressing component, disposed on the brewing head base, includes a brewing head unit adapted to the powder bowl and a drive assembly for pressing the brewing head unit against the powder bowl.

[0009] The aforementioned automatic locking structure for the brewing head seals the brewing chamber by placing the powder bowl into the brewing opening and using a drive assembly to press the brewing head unit against the powder bowl. This highly automated process eliminates the need for users to manually align the positioning teeth and screw the powder bowl onto the brewing head, saving time and effort and improving the user experience.

[0010] Furthermore, the driving assembly includes a driving mounting base connected to the brewing head base, a driving motor disposed on the driving mounting base, and a transmission unit that is driven by the driving motor to perform lifting and lowering actions; the brewing head unit includes a brewing head body connected to the transmission unit; the brewing head body moves up and down along the vertical center line of the brewing port.

[0011] Furthermore, the transmission unit includes a first gear, a cam rotating member, a sliding boss member, and an elastic member; the first gear is disposed at the output end of the drive motor, the cam rotating member is provided with a transmission part that meshes with the first gear and a convex part, the sliding boss member is provided with a boss surface that matches the convex part, and the elastic member presses the sliding boss member to bring the sliding boss member closer to and in close contact with the cam rotating member.

[0012] Furthermore, the brewing head seat is provided with a guide centering structure, which includes a support guide arc disposed below the brewing port and a positioning groove disposed at the end of the support guide arc; the top of the powder bowl is provided with a limiting flange protruding outward along the circumference; the limiting flange is adapted to the positioning groove.

[0013] Furthermore, the positioning groove contacts the limiting flange through an inlet inclined surface; the angle between the inlet inclined surface and the center line of the powder bowl is in the range of 30° to 60°.

[0014] Furthermore, the supporting guide arc includes two L-shaped guide strips symmetrically arranged at the bottom of the brewing head base, the two L-shaped guide strips forming a powder bowl inlet; the L-shaped guide strips have a first guide slope in the width direction and a second guide slope in the height direction on the side facing the powder bowl inlet.

[0015] Furthermore, the brewing head unit includes a sealing ring disposed on the brewing head body, the sealing ring being adapted to the top of the powder bowl.

[0016] Furthermore, it also includes a brewing back pressure component; the brewing head body includes a base and a plurality of connecting pillars protruding from the base, and the plurality of connecting pillars form an accommodating space for accommodating the brewing back pressure component; the brewing back pressure component includes a switch valve connected to a hot water pipe and a back pressure valve unit disposed on the base; when the switch valve is opened, the back pressure valve unit is subjected to water pressure impact force, which causes the water outlet channel on the base to connect to the hot water pipe.

[0017] Furthermore, the back pressure valve unit includes a back pressure valve body with a back pressure channel, a valve core disposed in the back pressure channel, and a second spring that presses the valve core toward the inlet of the back pressure channel.

[0018] On the other hand, a pressure coffee machine includes a coffee machine body and an automatic locking structure for the brewing head. Attached Figure Description

[0019] The present invention can be further understood from the following description taken in conjunction with the accompanying drawings. The components in the drawings are not necessarily drawn to scale; rather, the focus is on illustrating the principles of the embodiments. In different views, the same reference numerals designate corresponding parts.

[0020] Figure 1 This is a cross-sectional view of the automatic locking structure of the brewing head according to an embodiment of the present invention. Figure 1 ;

[0021] Figure 2 This is a cross-sectional view of the automatic locking structure of the brewing head according to an embodiment of the present invention. Figure 2 ;

[0022] Figure 3 This is an exploded view of the brewing head and transmission unit according to an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the structure of the brewing head seat according to an embodiment of the present invention;

[0024] Figure 5 yes Figure 1 Enlarged view of the structure at point E in the middle.

[0025] Explanation of reference numerals in the attached figures:

[0026] 3. Cam rotating component; 4. Transmission unit; 5. Sliding boss component; 6. Drive motor; 7. Elastic component; 9. Brewing head seat; 10. Limit switch unit; 11. Back pressure valve unit; 12. Brewing head unit; 13. Drive mounting base; 15. Powder bowl component; 101. Limit switch seat; 102. Upper and lower limit switches; 103. Limit trigger plate; 121. Brewing head body; 122. Sealing ring; 123. Brewing head cover; 111. Back pressure valve body; 113. Valve core; 115. Second spring. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with its embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and do not limit its scope of protection.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0030] In this utility model, "first" and "second" do not represent a specific quantity or order, but are merely used to distinguish names.

[0031] On the one hand, such as Figure 1 and Figure 2 , Figure 3 As shown, an automatic locking structure for a brewing head in one embodiment of this utility model includes:

[0032] Brewing head base 9, equipped with a brewing spout;

[0033] The powder bowl component 15 includes a powder bowl piece that is adapted to the brewing spout;

[0034] The pressing component, disposed on the brewing head base 9, includes a brewing head unit 12 adapted to the powder bowl and a drive assembly for pressing the brewing head unit 12 toward the powder bowl.

[0035] The above-mentioned automatic locking structure for the brewing head seals the brewing chamber by placing the powder bowl into the brewing port and using the drive assembly to press the brewing head unit 12 against the powder bowl. This highly automated process avoids the need for users to manually align the positioning teeth and manually screw the powder bowl 15 onto the brewing head base 9, saving time and effort and improving the user experience.

[0036] In one embodiment, the drive assembly includes a drive mounting base 13 connected to the brewing head base 9, a drive motor 6 mounted on the drive mounting base 13, and a transmission unit 4 driven by the drive motor 6 to perform lifting and lowering movements. The brewing head unit 12 includes a brewing head body 121 connected to the transmission unit 4. The brewing head body 121 moves up and down along the vertical center line of the brewing opening. Thus, by driving the transmission unit 4 to perform lifting and lowering movements through the drive motor 6, the brewing head body 121 is driven to move downward along the vertical center line of the brewing opening, thereby pressing the brewing head unit 12 against the powder bowl to achieve a seal in the brewing chamber.

[0037] In one embodiment, the transmission unit 4 includes a first gear, a cam rotating member 3, a sliding boss member 5, and an elastic member 7. The first gear is located at the output end of the drive motor 6. The cam rotating member 3 has a transmission part that meshes with the first gear and a convex part. The sliding boss member 5 has a boss surface that matches the convex part. Thus, the elastic member 7 presses against the sliding boss member 5, causing the sliding boss member 5 to approach and make close contact with the cam rotating member 3. When the first gear rotates and drives the cam rotating member 3 to rotate through the transmission part, the oblique contact surface between the convex part and the boss surface changes, thereby causing the sliding boss member 5 to produce a vertical downward displacement, which in turn causes the brewing head body 121 to move downward along the vertical center line of the brewing opening. When the output shaft of the drive motor 6 rotates back to its original position, the elastic member 7 presses against the sliding boss member 5 to return to its original vertical height.

[0038] In one embodiment, the convex part includes a plurality of inclined bosses disposed at the bottom of the cam rotating member 3, the inclined height dimension of the inclined bosses being adapted to the travel distance dimension of the brewing head body 121 pressing against the powder bowl member.

[0039] In one embodiment, a limit switch unit 10 is also included. The limit switch unit 10 includes a limit switch base 101 disposed on the drive mounting base 13, upper and lower limit switches 102 disposed on the limit switch base 101, and a limit trigger plate 103 disposed on the brewing head body 121. Thus, when the limit trigger plate 103 contacts the upper and lower limit switches 102, the upper and lower limit switches 102 send position signals to the controller of the coffee machine, thereby initiating the next brewing action.

[0040] like Figure 3 and Figure 4 As shown, in one embodiment, the brewing head base 9 is provided with a guiding centering structure, which includes a supporting guide arc located below the brewing opening and a positioning groove located at the end of the supporting guide arc; the top of the powder bowl is provided with a limiting flange protruding outward along the circumference; the limiting flange is adapted to the positioning groove. In this way, after the powder bowl is placed into the brewing head base 9, the limiting flange and the positioning groove cooperate to ensure that the center of the brewing head base 9 and the powder bowl are automatically aligned, thereby improving the sealing performance.

[0041] like Figure 1 and Figure 5 As shown, in one embodiment, the positioning groove contacts the limiting flange via an inlet ramp; the angle between the inlet ramp and the center line of the powder bowl is between 30° and 60°. Thus, through the guiding effect of the inlet ramp, the brewing head seat 9 is automatically aligned with the center of the powder bowl, reducing the impact of part dimensional deviations on sealing performance and improving sealing efficiency.

[0042] In one embodiment, the supporting guide arc includes two symmetrically arranged L-shaped guide strips at the bottom of the brewing head base 9, forming a powder bowl inlet. The L-shaped guide strips have a first guide slope in the width direction and a second guide slope in the height direction on the side facing the powder bowl inlet. Thus, when the powder bowl component 15 is placed into the brewing head base 9, the first and second guide slopes allow the powder bowl component to be more easily placed into the positioning groove at the end of the supporting guide arc, resulting in smooth placement and improved user comfort.

[0043] In one embodiment, the brewing head unit 12 includes a sealing ring 122 disposed on the brewing head body 121, the sealing ring 122 being adapted to the top of the powder bowl. Specifically, the brewing head body 121 is also provided with a brewing head cover 123, which is used to press the sealing ring 122 onto the brewing head body 121 and is provided with a water outlet. In this way, the elastic deformation of the sealing ring 122 is used to improve the sealing effect of the brewing chamber.

[0044] In one embodiment, a brewing back pressure component is also included; the brewing head body 121 includes a base and a plurality of connecting supports protruding from the base, with the plurality of connecting supports forming an accommodating space for accommodating the brewing back pressure component; the brewing back pressure component includes a switch valve communicating with a hot water pipe, and a back pressure valve unit 11 disposed on the base. Thus, when the switch valve is opened, the back pressure valve unit 11 is subjected to water pressure impact, causing the water outlet channel on the base to communicate with the hot water pipe.

[0045] In one embodiment, the back pressure valve unit 11 includes a back pressure valve body 111 with a back pressure water channel, a valve core 113 disposed within the back pressure water channel, and a second spring 115 that pushes the valve core 113 toward the inlet of the back pressure water channel. Thus, when the switch valve is opened, the water pressure impact force overcomes the elastic force of the second spring 115, the valve core 113 moves away from the inlet of the back pressure water channel, and the water outlet channel on the seat is connected to the hot water pipe, allowing hot water to flow into the brewing chamber from the water outlet channel.

[0046] On the other hand, one embodiment of this utility model provides a pressure coffee machine, including a coffee machine body and an automatic locking structure for the brewing head disposed on the coffee machine body. Thus, by using a drive assembly to drive the brewing head unit 12 to press against the portafilter, automatic sealing of the brewing head unit 12 and the portafilter 15 is achieved, realizing automated coffee brewing and thus improving the user experience.

[0047] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0048] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. An automatic locking structure for a brewing head, characterized in that, include: The brewing head base (9) is equipped with a brewing spout; The powder bowl component (15) includes a powder bowl component adapted to the brewing spout; The pressing component, disposed on the brewing head base (9), includes a brewing head unit (12) adapted to the powder bowl and a drive assembly for pressing the brewing head unit (12) against the powder bowl.

2. The automatic locking structure for a brewing head according to claim 1, characterized in that, The drive assembly includes a drive mounting base (13) connected to the brewing head base (9), a drive motor (6) mounted on the drive mounting base (13), and a transmission unit (4) driven by the drive motor (6) to perform lifting and lowering actions. The brewing head unit (12) includes a brewing head body (121) connected to the transmission unit (4); The brewing head (121) moves up and down along the vertical center line of the brewing port.

3. The automatic locking structure for a brewing head according to claim 2, characterized in that, The transmission unit (4) includes a first gear, a cam rotating component (3), a sliding boss component (5), and an elastic component (7); The first gear is located at the output end of the drive motor (6). The cam rotating member (3) is provided with a transmission part that meshes with the first gear and a convex part. The sliding boss member (5) is provided with a boss surface that matches the convex part. The elastic member (7) presses the sliding boss member (5) to make the sliding boss member (5) approach and make it in close contact with the cam rotating member (3).

4. The automatic locking structure for a brewing head according to claim 1, characterized in that, The brewing head base (9) is provided with a guide centering structure, which includes a support guide arc disposed below the brewing port and a positioning groove disposed at the end of the support guide arc. The top of the powder bowl is provided with a limiting flange that protrudes outward along the circumference; The limiting flange is adapted to the positioning groove.

5. The automatic locking structure for a brewing head according to claim 4, characterized in that, The positioning groove contacts the limiting flange via an inclined surface. The angle between the guide slope and the center line of the powder bowl is in the range of 30° to 60°.

6. The automatic locking structure for a brewing head according to claim 4, characterized in that, The supporting guide arc includes two L-shaped guide strips symmetrically arranged at the bottom of the brewing head base (9), and the two L-shaped guide strips form the powder bowl inlet; The L-shaped guide strip has a first guide slope in the width direction and a second guide slope in the height direction on the side facing the powder bowl inlet.

7. The automatic locking structure for a brewing head according to claim 2, characterized in that, The brewing head unit (12) includes a sealing ring (122) disposed on the brewing head body (121), the sealing ring (122) being adapted to the top of the powder bowl.

8. The automatic locking structure for a brewing head according to claim 2, characterized in that, It also includes a brewing back pressure component; The brewing head body (121) includes a base and a plurality of connecting pillars protruding from the base, wherein the plurality of connecting pillars form an accommodating space for accommodating the brewing back pressure component. The brewing back pressure component includes a switch valve connected to the hot water pipe and a back pressure valve unit (11) installed on the seat. When the switch valve is opened, the back pressure valve unit (11) is subjected to water pressure impact force, which causes the water outlet channel on the seat to connect with the hot water pipe.

9. The automatic locking structure for a brewing head according to claim 8, characterized in that, The back pressure valve unit (11) includes a back pressure valve body (111) with a back pressure channel, a valve core (113) disposed in the back pressure channel, and a second spring (115) that presses the valve core (113) toward the inlet of the back pressure channel.

10. A pressure coffee machine, characterized in that, It includes the coffee machine body and the automatic locking structure for the brewing head as described in any one of claims 1 to 9.

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