Coffee machine extraction base

Abstract

This utility model relates to a coffee machine extraction base, including an extraction base and a bottom cover. The outer wall of the extraction base is provided with a connecting part for connecting the handle. The extraction base has a filter receiving cavity, and the top of the extraction base has a top opening communicating with the filter receiving cavity, and the bottom of the extraction base has a bottom opening communicating with the filter receiving cavity. The bottom of the bottom cover has a dispensing nozzle, and the top of the bottom cover is a plug connector with a dispensing inlet communicating with the dispensing nozzle. The side wall of the plug connector is provided with elastic devices at intervals. The inner wall of the filter receiving cavity has a slot near the bottom opening. The plug connector passes through the bottom opening and is inserted into the interior of the extraction base. The elastic devices abut against the slot, thereby locking the extraction base and the bottom cover together. This design, by providing a slot on the inner wall of the extraction base and an elastic device on the side wall of the bottom cover plug connector, allows the bottom cover to be inserted and closed automatically, and released easily, shortening the assembly time.

Description

Technical Field

[0001] This utility model relates to a coffee machine extraction base. Background Technology

[0002] With the popularization of coffee culture and the trend of home use and premium coffee machines, the extraction components of coffee machines (usually called "extraction bases" or "port filter holders") have been constantly evolving in structure and function. Traditional extraction bases typically consist of a filter basket and a removable bottom cover, which is connected to the extraction base body by threads or snap-fit ​​structures to support the filter and guide the coffee liquid out.

[0003] A new type of extraction stand, the "bottomless / bottomed switchable" type, has emerged in the industry. It allows users to freely switch between bottomed and bottomless modes by plugging in or rotating the bottom cover. It is compatible with different sizes of filters and makes it convenient for users to observe the coffee dripping.

[0004] However, these types of switching extraction seats often employ complex structures between the bottom cover and the extraction seat body, such as multi-point springs, threaded interfaces, or even additional snap rings or metal pins, to ensure connection strength and sealing.

[0005] These solutions involve cumbersome procedures and a large number of parts during assembly and maintenance, and require high machining precision. They are prone to problems such as jamming, leakage, or detachment, which restricts product reliability and cost control. Utility Model Content

[0006] The purpose of this invention is to provide a coffee machine extraction base with a simple structure, convenient assembly of the extraction base and the bottom cover, and a stable connection.

[0007] The purpose of this utility model is achieved as follows:

[0008] A coffee machine extraction base includes an extraction base and a bottom cover. The outer wall of the extraction base is provided with a connecting part for connecting the handle. The extraction base is provided with a filter receiving cavity. The top of the extraction base has a top opening communicating with the filter receiving cavity, and the bottom of the extraction base has a bottom opening communicating with the filter receiving cavity.

[0009] The bottom of the bottom cover has a liquid outlet, the top of the bottom cover is a connector, the connector has a liquid inlet that connects to the liquid outlet, and the side wall of the connector is provided with elastic devices at intervals.

[0010] The inner wall of the filter cavity has a slot near the bottom opening. The connector passes through the bottom opening and is inserted into the extraction seat. The elastic device abuts against the slot to lock the extraction seat and the bottom cover together.

[0011] This design incorporates a slot on the inner wall of the extraction seat and an elastic device on the side wall of the bottom cover connector, enabling the bottom cover to be inserted and locked automatically, and pulled out and released easily, thus shortening the assembly time.

[0012] The combination of the flexible device and the slot ensures both connection strength and sealing, while also allowing users to easily switch between "with bottom" and "without bottom" modes with one hand. It is compatible with the installation requirements of filters of different sizes, and in the bottomless state, the coffee extraction process can be observed directly, improving ease of use and user experience.

[0013] In addition, the structure is durable and reliable, and is not prone to loosening or leakage due to frequent disassembly and assembly. It is easy to maintain and significantly improves the overall reliability and service life of the product.

[0014] The objective of this utility model can also be achieved by the following technical measures:

[0015] Furthermore, it also includes a filter screen, which is detachably disposed in the filter screen receiving cavity.

[0016] By detachably placing the filter screen inside the filter screen housing, a larger size filter screen can be quickly replaced in a "bottomless" state to meet the needs of different brewing amounts and grinding fineness. At the same time, different sized filter screens can be securely fixed without replacing the entire extraction base, which improves the applicability and economy of the product and allows users to flexibly switch extraction methods according to their preferences.

[0017] Furthermore, the elastic device includes an elastic ring and steel balls, and the elastic ring has racetrack-shaped holes spaced apart along its circumference, the width of which is smaller than the diameter of the steel balls.

[0018] The sidewall of the bottom cover is spaced apart by funnel-shaped channels. The large-diameter opening of the funnel-shaped channel faces the liquid inlet, and the small-diameter opening of the funnel-shaped channel faces outward. The diameter of the small-diameter opening is smaller than the diameter of the steel ball, and the diameter of the large-diameter opening is larger than the diameter of the steel ball.

[0019] The inner wall of the connector has a retaining ring groove;

[0020] The steel ball is placed in the trumpet-shaped channel, the elastic ring is placed in the retaining ring groove, one end of the steel ball abuts against the small-diameter opening, and the other end of the steel ball abuts against the racetrack-shaped hole. The elastic ring constitutes the reset mechanism of the steel ball.

[0021] The elastic ring and steel ball combine to form an automatic reset clamping mechanism: the geometric fit of the flared channel and racetrack-shaped hole allows the steel ball to be reliably positioned, preventing the bottom cover from loosening due to brewing pressure; the elastic ring provides continuous reset force, ensuring that the steel ball always fits tightly against the slot, enhancing the stability and sealing of the connection, thereby improving the safety and durability of the entire extraction seat system.

[0022] The length of the runway-shaped hole used is greater than the diameter of the steel ball. When installing the elastic ring, the steel ball does not need to be precisely aligned and can smoothly slide into the runway-shaped hole for positioning, which significantly improves assembly efficiency and reduces the difficulty of alignment.

[0023] Furthermore, the elastic ring has a notch.

[0024] Creating notches in the elastic ring increases the ring's elastic deformation range, making it easier to compress and unfold during assembly, reducing assembly torque, and simplifying manufacturing and maintenance processes. At the same time, the notch design can also buffer stress concentration, reduce fatigue damage to the elastic ring, and extend its service life.

[0025] Furthermore, the elastic ring is a metal ring.

[0026] The elastic ring is made of metal, which significantly improves its elastic recovery performance and wear and fatigue resistance. Compared with rubber or plastic materials, it is less prone to permanent deformation. The metal ring also has better high temperature resistance and corrosion resistance, making it suitable for long-term high temperature and high pressure boiling environments and ensuring a stable and reliable clamping effect.

[0027] Furthermore, the width of the slot is smaller than the diameter of the steel ball.

[0028] The slot width is designed to be smaller than the diameter of the steel ball, preventing the steel ball from falling out of the slot when no force is applied, thus forming a fixed lock. When force is applied during insertion or removal, the steel ball can be squeezed into the racetrack-shaped hole, causing the elastic ring to deform and loosen. This width ratio ensures the safety of the snap-fit ​​connection and the controllability of operation, preventing accidental detachment and ensuring that users can smoothly install and remove the bottom cover.

[0029] Furthermore, a positioning groove is provided on the inner wall of the extraction seat near the bottom opening, and a positioning protrusion is provided on the top of the bottom cover. The positioning protrusion is inserted into the positioning groove to achieve positioning and installation of the bottom cover and the extraction seat.

[0030] A new positioning slot is added inside the extraction unit, which, together with the positioning protrusion on the top of the bottom cover, enables the accurate positioning of the bottom cover and the extraction unit, avoiding misalignment or rotation during assembly. This positioning structure simplifies the installation process, improves the convenience of one-handed alignment and assembly for users, and ensures precise alignment and optimal sealing of the internal flow channels, further optimizing the stability and consistency of coffee extraction.

[0031] The beneficial effects of this utility model are as follows:

[0032] This invention allows the bottom cover to be easily inserted and easily removed by the cooperation of the elastic device on the side wall of the connector and the slot on the inner wall of the extraction seat, thus shortening the assembly time.

[0033] This invention features an automatic reset and locking mechanism formed by a steel ball and an elastic ring. Combined with the flared channel and slot geometry, it ensures that the bottom cover does not loosen during high-pressure cooking and provides durable sealing performance, thereby improving the safety and durability of the system.

[0034] This utility model features a detachable filter design that allows for the replacement of large-size filters in a "bottomless" state, meeting the needs of different grinding amounts. Moreover, the positioning protrusions and positioning grooves ensure one-time alignment, and the coffee extraction can be directly observed in the "bottomless" state, greatly improving the convenience and experience of use. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the coffee machine's extraction base.

[0036] Figure 2 This is an assembly drawing of the extraction base and the bottom cover.

[0037] Figure 3 This is an assembly drawing of the extraction seat and bottom cover from another angle.

[0038] Figure 4 This is an exploded view of the coffee machine's extraction unit.

[0039] Figure 5 This is a top view of the coffee machine's extraction unit.

[0040] Figure 6 for Figure 5 AA sectional view.

[0041] Figure 7 for Figure 5 BB cross-sectional view. Detailed Implementation

[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0043] Implementation examples, in conjunction with Figures 1 to 7 As shown, a coffee machine extraction base includes an extraction base 1 and a bottom cover 2. The outer wall of the extraction base 1 is provided with a connecting part 3 for connecting the handle. The extraction base 1 is provided with a filter receiving cavity 4. The top of the extraction base 1 has a top opening 41 communicating with the top of the filter receiving cavity 4, and the bottom of the extraction base 1 has a bottom opening 42 communicating with the bottom of the filter receiving cavity 4.

[0044] The bottom of the bottom cover 2 has a liquid outlet 21, the top of the bottom cover 2 is a connector 5, the connector 5 has a liquid inlet 51 that communicates with the liquid outlet 21, and the side wall of the connector 5 is provided with elastic devices at intervals.

[0045] The inner wall of the filter cavity 4 has a slot 43 near the bottom opening 42. The connector 5 passes through the bottom opening 42 and is inserted into the extraction seat 1. The elastic device 6 abuts against the slot 43 to lock the extraction seat 1 and the bottom cover 2 together.

[0046] Furthermore, it also includes a filter screen, which is detachably disposed in the filter screen receiving cavity 4.

[0047] Furthermore, the elastic device 6 includes an elastic ring 7 and a steel ball 8, wherein the elastic ring 7 has racetrack-shaped holes 71 spaced apart along its circumference, the width of which is smaller than the diameter of the steel ball 8;

[0048] The side wall of the bottom cover 2 is spaced apart by a funnel-shaped channel 9. The large diameter opening of the funnel-shaped channel 9 faces the liquid inlet 51, and the small diameter opening of the funnel-shaped channel 9 faces outward. The diameter of the small diameter opening is smaller than the diameter of the steel ball 8, and the diameter of the large diameter opening is larger than the diameter of the steel ball 8.

[0049] The inner wall of the connector 5 is provided with a retaining annular groove 10;

[0050] The steel ball 8 is placed in the trumpet-shaped channel 9, and the elastic ring 7 is placed in the retaining ring groove 10. One end of the steel ball 8 abuts against the small-diameter opening, and the other end of the steel ball 8 abuts against the racetrack-shaped hole 71. The elastic ring 7 constitutes the reset mechanism of the steel ball 8.

[0051] Furthermore, the elastic ring 7 has a notch 300.

[0052] Furthermore, the elastic ring 7 is a metal ring.

[0053] Furthermore, the width of the slot 43 is smaller than the diameter of the steel ball 8.

[0054] Furthermore, a positioning groove 100 is provided on the inner wall of the extraction seat 1 near the bottom opening 42, and a positioning protrusion 200 is provided on the top of the bottom cover 2. The positioning protrusion 200 is inserted into the positioning groove 100 to realize the positioning installation of the bottom cover 2 and the extraction seat 1.

Claims

1. A coffee machine extraction seat comprising an extraction seat and a bottom cover, characterized in that: The outer wall of the extraction seat is provided with a connecting part for connecting the handle. The extraction seat is provided with a filter screen receiving cavity. The top of the extraction seat has a top opening that communicates with the top of the filter screen receiving cavity, and the bottom of the extraction seat has a bottom opening that communicates with the bottom of the filter screen receiving cavity. The bottom of the bottom cover has a liquid outlet, the top of the bottom cover is a connector, the connector has a liquid inlet that connects to the liquid outlet, and the side wall of the connector is provided with elastic devices at intervals. The inner wall of the filter cavity has a slot near the bottom opening. The connector passes through the bottom opening and is inserted into the extraction seat. The elastic device abuts against the slot to lock the extraction seat and the bottom cover together.

2. The coffee maker extraction seat according to claim 1, characterized in that: It also includes a filter screen, which is detachably disposed in the filter screen receiving cavity.

3. The coffee maker extraction seat of claim 1, wherein: The elastic device includes an elastic ring and steel balls, and the elastic ring has racetrack-shaped holes spaced apart along its circumference, with a width smaller than the diameter of the steel balls. The sidewall of the bottom cover is spaced apart by funnel-shaped channels. The large-diameter opening of the funnel-shaped channel faces the liquid inlet, and the small-diameter opening of the funnel-shaped channel faces outward. The diameter of the small-diameter opening is smaller than the diameter of the steel ball, and the diameter of the large-diameter opening is larger than the diameter of the steel ball. The inner wall of the connector has a retaining ring groove; The steel ball is placed in the trumpet-shaped channel, the elastic ring is placed in the retaining ring groove, one end of the steel ball abuts against the small-diameter opening, and the other end of the steel ball abuts against the racetrack-shaped hole. The elastic ring constitutes the reset mechanism of the steel ball.

4. The coffee maker extraction seat of claim 3, wherein: The elastic ring has a notch.

5. The coffee maker extraction seat of claim 3, wherein: The elastic ring is a metal ring.

6. The coffee maker extraction seat of claim 3, wherein: The width of the slot is smaller than the diameter of the steel ball.

7. The coffee maker extraction seat according to any one of claims 1-6, characterized in that: The inner wall of the extraction seat has a positioning groove near the bottom opening, and the top of the bottom cover has a positioning protrusion. The positioning protrusion is inserted into the positioning groove to achieve positioning and installation of the bottom cover and the extraction seat.

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