Quickly detachable coffee extraction structure and portable coffee machine with pressure dregging function

Abstract

The present disclosure provides a quick detachable coffee extraction structure and a portable coffee machine with pressure dregging function. The quick detachable coffee extraction structure comprises an extraction head, a quick detachable assembly and an extraction assembly; a flexible expansion sleeve ring is slidably sleeved on the extraction head, and the elastic end of the flexible expansion sleeve ring is elastically connected to the end face of the fixed end of the extraction head; a plurality of limiting through holes are formed on the inner peripheral wall of the butt joint groove, the plurality of limiting through holes are uniformly and intermittently distributed, the number of the sliding pressure holding limiting pieces is consistent with the number of the limiting through holes, each sliding pressure holding limiting piece is limited in the limiting through hole corresponding to it, and the hole wall of the corresponding limiting through hole is slidably abutted, the pushing end of the flexible expansion sleeve ring is oppositely arranged with each sliding pressure holding limiting piece, and the length of the sliding pressure holding limiting piece is greater than the length of the limiting through hole. The quick detachable coffee extraction structure has good use convenience.

Description

Technical Field

[0001] This disclosure relates to the technical field of portable coffee machines with pressure-driven dredging function, and in particular to a coffee extraction structure that can be quickly disassembled and a portable coffee machine with pressure-driven dredging function. Background Technology

[0002] With the continuous development of society and economy, people's pursuit of quality of life is constantly improving. Coffee, as a beverage that combines flavor and energizing effects, has gradually been integrated into daily work, life and travel scenarios, becoming one of the most popular beverages.

[0003] However, traditional coffee machines are generally bulky, complex in structure, and poorly portable, typically only suitable for indoor use in homes and offices, failing to meet the coffee-drinking needs of users in mobile scenarios such as outdoor travel and business commutes. To adapt to mobile usage scenarios, some manufacturers have specifically developed portable coffee machines, optimizing structural design to reduce product size, greatly improving portability and meeting users' needs to brew coffee anytime, anywhere.

[0004] However, existing portable coffee machines still have significant drawbacks in use: their brewing principle largely relies on a water pump to output high-pressure water to press and extract coffee grounds in the extraction container. This process causes the brewed coffee grounds to adhere tightly to the bottom of the extraction container under high pressure, forming a hard, cake-like coffee grounds. When users need to brew coffee again, they must manually remove the coffee grounds from the extraction container, which is not only repetitive and tedious, but also difficult to clean completely due to the strong adhesion between the coffee grounds and the container's inner wall. The residual coffee grounds can also affect the flavor of subsequent coffee extractions.

[0005] To address the aforementioned issues, existing patent CN118203238A discloses a pressure-driven coffee grounds discharge mechanism and a portable pressure coffee machine. The mechanism includes a brewing body, an extraction support, and a filter cup. The brewing body has a built-in pressure water pump, the outlet of which is connected to the liquid outlet of the brewing body. The extraction support is connected to the brewing body and has a sequentially connected interface, mounting cavity, and discharge port. The interface is connected to the liquid outlet of the brewing body and to the outlet of the pressure water pump. The filter cup holds coffee grounds and is detachably mounted in the mounting cavity. The bottom of the filter cup has evenly distributed filter holes. When discharging coffee grounds, the opening of the filter cup faces and connects to the discharge port. Through the filter holes, it connects to the outlet of the pressure water pump, allowing air from the pressure water pump to act on the coffee grounds through the filter holes at the bottom of the filter cup, achieving efficient and thorough coffee grounds discharge.

[0006] However, the extraction holders of existing portable coffee machines usually use threaded connections or snap-fit ​​connections as the main docking methods to assemble and fix them to the brewing body. Threaded connections require multiple screwing and alignment, making the operation process cumbersome. Snap-fit ​​structures have problems with difficult snap-fit ​​alignment and difficult insertion and removal, which makes the disassembly and assembly of the extraction holder difficult in actual use, thus greatly reducing the ease of use of portable coffee machines. Summary of the Invention

[0007] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide a coffee extraction structure with good ease of use and quick disassembly, as well as a portable coffee machine with pressure-driven grounds removal function.

[0008] The purpose of this disclosure is achieved through the following technical solution: A coffee extraction structure that can be quickly assembled and disassembled includes an extraction head, a quick-assembly and disassembly assembly, and an extraction assembly. The extraction head is used to install and fix it to the liquid outlet of a portable coffee machine with pressure slag removal function; a docking groove is formed on the extraction end face of the extraction head, and a liquid outlet is provided at the bottom of the docking groove; The quick-assembly assembly includes an elastic telescopic collar and a sliding holding limiter. The elastic telescopic collar is slidably sleeved on the extraction head, and the elastic end of the elastic telescopic collar is elastically connected to the fixed end face of the extraction head. The inner peripheral wall of the docking groove is formed with multiple limiting through holes, which are evenly spaced. The number of sliding holding limiters is the same as the number of limiting through holes. Each sliding holding limiter is limited in the limiting through hole and slides against the hole wall of the corresponding limiting through hole. The pushing end of the elastic telescopic collar is opposite to each sliding holding limiter, and the length of the sliding holding limiter is greater than the length of the limiting through hole. When the pushing end of the elastic telescopic collar slides to the first position of the extraction head, the pushing end of the elastic telescopic collar moves away from the sliding pressure limiting member; When the pushing end of the elastic telescopic collar slides to the second position of the extraction head, the pushing end of the elastic telescopic collar pushes each of the sliding pressing and limiting members to protrude from the limiting through hole and extend into the docking groove, so that each of the sliding pressing and limiting members simultaneously abuts and presses against the outer peripheral wall of the extraction assembly, so that multiple sliding pressing and limiting members jointly clamp and fix the extraction assembly; and the elastic end of the elastic telescopic collar elastically supports the pushing end of the elastic telescopic collar at the second position of the extraction head.

[0009] In one embodiment, the extraction assembly includes an extraction frame and a powder-carrying filter cup. The extraction frame is docked to the docking groove and has a first connection port, an installation cavity, and a second connection port that are sequentially connected. The powder-carrying filter cup is installed in the installation cavity, with its opening facing and connected to the first connection port. The bottom of the powder-carrying filter cup has a plurality of evenly distributed filter holes. The first connection port is formed on the end face of the first docking portion of the extraction frame, and the second connection port is formed on the end face of the second docking portion of the extraction frame. During the extraction operation, the first docking part is sealed and docked with the docking groove so that the first connection port is connected to the docking groove; During the slag discharge operation, the second docking part is sealed and docked with the docking groove so that the second connection port is connected to the docking groove.

[0010] In one embodiment, during the extraction operation, the pushing end of the elastic telescopic collar pushes each of the sliding pressing and limiting members to simultaneously abut and press against the outer peripheral wall of the first docking part, so as to clamp and limit the first docking part within the docking groove; During the slag discharge operation, the pushing end of the elastic telescopic collar pushes each of the sliding pressing and limiting members to simultaneously abut and press against the outer peripheral wall of the second docking part, so as to clamp and limit the second docking part within the docking groove.

[0011] In one embodiment, the elastic telescopic collar includes a telescopic sleeve and an elastic element. The pushing end of the elastic telescopic collar is disposed on the telescopic sleeve, and the elastic end of the elastic telescopic collar is disposed on the elastic element. The telescopic sleeve is sleeved on the extraction head. The inner peripheral wall of the telescopic sleeve slides against the outer peripheral wall of the extraction head. The pushing end of the telescopic sleeve is disposed opposite to the sliding pressing and limiting element. The elastic element is disposed between the telescopic sleeve and the fixed end of the extraction head, and both ends of the elastic element are elastically connected to the telescopic sleeve and the fixed end of the extraction head, respectively.

[0012] In one embodiment, the extraction head includes a fixing part and an extraction part that are fixed to each other. The fixing end of the extraction head is disposed on the fixing part, and the extraction end of the extraction head is disposed on the extraction part. The extraction part is used to install and fix to the liquid outlet of the portable coffee machine with pressure slag removal function through the fixing part. The telescopic sleeve is sleeved on the extraction part, and the inner peripheral wall of the telescopic sleeve slides against the outer peripheral wall of the extraction part. The docking groove is formed on the end face of the extraction part away from the fixing part. The elastic member is disposed between the telescopic sleeve and the fixing part, and the two ends of the elastic member are elastically connected to the telescopic sleeve and the fixing part, respectively.

[0013] In one embodiment, the telescopic sleeve is provided with a connecting part, a pushing part, and a limiting part in sequence. The pushing end of the telescopic sleeve is provided at the pushing part. The connecting part and the fixing part are disposed opposite to each other. The elastic member is disposed between the connecting part and the fixing part, and the two ends of the elastic member are elastically connected to the connecting part and the fixing part, respectively. A guide limiting surface is formed on one side of the limiting part adjacent to the sliding holding limiting member. The guide limiting surface extends obliquely away from the sliding holding limiting member. An annular limiting flange protrudes from the inner wall of the opening of the limiting through hole adjacent to the docking groove. When the telescopic sleeve slides to the first position of the extraction head, the limiting part covers the limiting through hole, so that the limiting part and the outer peripheral wall of the extraction part together form an avoidance area through the guide limiting surface, and the annular limiting flange and the limiting part together limit the sliding pressing limiting member to the limiting through hole. When the telescopic sleeve slides to the second position of the extraction head, the pushing part covers each of the limiting through holes and pushes each of the sliding pressing limiting members to simultaneously abut and press against the outer peripheral wall of the extraction frame, so that the multiple sliding pressing limiting members together clamp and fix the extraction frame; and the elastic member elastically supports the telescopic sleeve at the second position of the extraction head.

[0014] In one embodiment, the outer peripheral wall of the first docking portion is provided with an annular support limiting flange. When the pushing end of the elastic telescopic collar slides to the second position of the extraction head, each of the sliding pressing limiting members simultaneously abuts and supports against the annular support limiting flange.

[0015] In one embodiment, the outer peripheral wall of the second docking portion is formed with a rough limiting surface. When the pushing end of the elastic telescopic collar slides to the second position of the extraction head, each of the sliding pressing limiting members simultaneously abuts and presses against the rough limiting surface.

[0016] In one embodiment, a first sealing ring is fixed to the inner peripheral wall of the docking groove. During the extraction operation, the two sides of the first sealing ring are respectively press-fitted against the inner peripheral wall of the docking groove and the outer peripheral wall of the first docking portion.

[0017] In one embodiment, the bottom of the docking groove is provided with a liquid outlet, and the liquid outlet is disposed on the end face of the liquid outlet. During the slag discharge operation, the liquid outlet extends into the mounting cavity through the second connection port. A second sealing ring is fixed to the mounting cavity near the second connection port. During the slag discharge operation, the liquid outlet extends into the mounting cavity through the second connection port, and the two sides of the second sealing ring respectively press against the inner peripheral wall of the mounting cavity and the outer peripheral wall of the liquid outlet.

[0018] In one embodiment, an annular limiting ring is fixed to the outer peripheral wall of the extraction head. The annular limiting ring is disposed between the limiting through hole and the extraction end face of the extraction head. The annular limiting ring is used to abut and support the pushing part so that the elastic element and the annular limiting ring together clamp and limit the telescopic sleeve to the second position of the extraction head.

[0019] A portable coffee machine with pressure-driven slag removal function includes the coffee extraction structure that can be quickly disassembled and installed as described in any of the above embodiments, wherein the extraction head is installed and fixed to the liquid outlet end of the portable coffee machine with pressure-driven slag removal function.

[0020] Compared with the prior art, this disclosure has at least the following advantages: The aforementioned quick-assembly and detachable coffee extraction structure, when the pushing end of the elastic telescopic collar slides to the first position of the extraction head, moves away from the sliding holding limit member; when the pushing end of the elastic telescopic collar slides to the second position of the extraction head, it pushes each sliding holding limit member partially protruding from the limiting through hole and extending into the docking groove, so that each sliding holding limit member simultaneously abuts and presses against the outer peripheral wall of the extraction assembly, allowing multiple sliding holding limit members to jointly clamp and fix the extraction assembly; and the elastic end of the elastic telescopic collar elastically supports the pushing end of the elastic telescopic collar at the second position of the extraction head. When it is necessary to dock the extraction assembly into the docking groove, it is only necessary to first push the pushing end of the elastic telescopic collar from the second position of the extraction head to the first position of the extraction head, and then dock the extraction assembly. Within the docking groove, the push of the elastic telescopic collar is then stopped, allowing the elastic end of the elastic telescopic collar to push the push end of the elastic telescopic collar back to the second position of the extraction head through its own elastic deformation capability. This allows multiple sliding pressure limiting members to jointly clamp and fix the extraction component, achieving a reliable docking between the extraction component and the docking groove. When it is necessary to separate the extraction component from the extraction head, simply push the push end of the elastic telescopic collar from the second position of the extraction head to the first position of the extraction head, so that the push end of the elastic telescopic collar moves away from the sliding pressure limiting members, eliminating the pressure of the sliding pressure limiting members on the outer peripheral wall of the extraction component. This allows the user to easily separate the extraction component from the extraction head, greatly reducing the difficulty of installing and disassembling the extraction component, and thus greatly improving the ease of use of portable coffee machines with pressure churn function. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the accompanying drawings used in the embodiments will be briefly described below. It should be understood that the following drawings only show some embodiments of this disclosure and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of a portable coffee machine with pressure-discharging function according to an embodiment; Figure 2 for Figure 1 The diagram shows the internal structure of a portable coffee machine with pressure churn function (in extraction operation mode). Figure 3 for Figure 2 A partially enlarged schematic diagram of a portable coffee machine with pressure-assisted coffee maker; Figure 4 for Figure 1 Another internal structure diagram of a portable coffee machine with pressure churn function (churn operation state). Figure 5 for Figure 4 A partially enlarged schematic diagram of a portable coffee machine with pressure-assisted coffee maker; Figure 6 for Figure 1 A partial structural diagram of a portable coffee machine with pressure-driven coffee maker is shown. Figure 7 for Figure 1 Another partial structural diagram of a portable coffee machine with pressure-driven coffee maker is shown. Figure 8 for Figure 1 This is another partial structural diagram of a portable coffee machine with pressure-driven churn function. Figure 9 This is a schematic diagram of a coffee extraction structure that can be quickly assembled and disassembled (the telescopic sleeve is located at the first position of the extraction head). Figure 10 This is a schematic diagram of a coffee extraction structure that can be quickly assembled and disassembled (the telescopic sleeve is located at the second position of the extraction head). Figure 11 This is a schematic diagram of the structural model of a portable coffee machine with pressure-driven slag removal function.

[0023] Reference numerals: 10 for quick-assembly and disassembly coffee extraction structure; 100 for extraction head; 110 for docking groove; 111 for liquid outlet; 112 for limiting through hole; 1121 for annular limiting flange; 1121a for inclined surface; 113 for first sealing ring; 114 for first annular limiting groove; 115 for liquid outlet; 120 for fixing part; 130 for extraction part; 140 for annular limiting ring; 150 for annular snap-fit ​​groove; 200 for quick-assembly and disassembly assembly; 210 for elastic telescopic collar; 211 for telescopic sleeve; 2111 for connecting part; 2111a for annular retaining flange; 2112 for pushing part; 2113 for limiting part; 2113a for guiding limiting surface; 212 for elastic element. ; Avoidance zone 213; Enclosure protection zone 214; Sliding pressure limiting component 220; Extraction assembly 300; Extraction rack 310; First connection port 311; Mounting cavity 312; Second sealing ring 3121; Second annular limiting groove 3122; Third sealing ring 3123; Third annular limiting groove 3124; Second connection port 313; First docking part 314; Annular support limiting flange 3141; First guide slope 3141a; Second guide slope 3141b; Second docking part 315; Rough limiting surface 3151; Powder filter cup 320; Filter hole 321; Portable coffee machine 20 with pressure slag discharge function. Detailed Implementation

[0024] To facilitate understanding of this disclosure, a more complete description will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the present disclosure. However, this disclosure can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure.

[0025] 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.

[0026] 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 disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] To better understand the technical solutions and beneficial effects of this disclosure, the following detailed description is provided in conjunction with specific embodiments: like Figures 1 to 11 As shown, an embodiment of a quick-release coffee extraction structure 10 includes an extraction head 100, a quick-release assembly 200, and an extraction component 300. The extraction head 100 is used to install and fix to the liquid outlet of a portable coffee machine 20 with a pressure-discharge function. A docking groove 110 is formed on the extraction end face of the extraction head 100, and a liquid outlet 111 is provided at the bottom of the docking groove 110. The quick-release assembly 200 includes an elastic telescopic collar 210 and a sliding pressure limiting member 220. The elastic telescopic collar 210 is slidably sleeved on the extraction head 100, and the elasticity of the elastic telescopic collar 210 is... The end is elastically connected to the fixed end face of the extraction head 100; the inner peripheral wall of the docking groove 110 is formed with a plurality of limiting through holes 112, the plurality of limiting through holes 112 are evenly spaced, the number of sliding pressing limiting members 220 is the same as the number of limiting through holes 112, each sliding pressing limiting member 220 is correspondingly limited in the limiting through hole 112 and slides against the hole wall of the corresponding limiting through hole 112, the pushing end of the elastic telescopic collar 210 is opposite to each sliding pressing limiting member 220, and the length of the sliding pressing limiting member 220 is greater than the length of the limiting through hole 112.

[0028] like Figures 1 to 6As shown, further, when the pushing end of the elastic telescopic collar 210 slides to the first position of the extraction head 100, the pushing end of the elastic telescopic collar 210 moves away from the sliding holding limit member 220; when the pushing end of the elastic telescopic collar 210 slides to the second position of the extraction head 100, the pushing end of the elastic telescopic collar 210 pushes each sliding holding limit member 220 partly to protrude out of the limiting through hole 112 and extend into the mating groove 110, so that each sliding holding limit member 220 simultaneously abuts and holds against the mating groove 110. The outer peripheral wall of the extraction component 300 allows multiple sliding pressing and limiting members 220 to jointly clamp and fix the extraction component 300; and the elastic end of the elastic telescopic collar 210 elastically supports the pushing end of the elastic telescopic collar 210 at the second position of the extraction head 100. When it is necessary to mate the extraction component 300 with the docking groove 110, it is only necessary to first push the pushing end of the elastic telescopic collar 210 from the second position of the extraction head 100 to the first position of the extraction head 100, and then mate the extraction component 300 with the docking groove 110. Within the groove 110, the push of the elastic telescopic collar 210 is then stopped, allowing the elastic end of the elastic telescopic collar 210 to push the push end of the elastic telescopic collar 210 back to the second position of the extraction head 100 through its own elastic deformation capability. This allows multiple sliding pressure limiting members 220 to jointly clamp and fix the extraction component 300, achieving a reliable connection between the extraction component 300 and the docking groove 110. When it is necessary to separate the extraction component 300 from the extraction head 100, it is only necessary to push the push end of the elastic telescopic collar 210 from the second position of the extraction head 100 to the first position of the extraction head 100, so that the push end of the elastic telescopic collar 210 moves away from the sliding pressure limiting member 220, eliminating the pressure of the sliding pressure limiting member 220 on the outer peripheral wall of the extraction component 300. This allows the user to easily separate the extraction component 300 from the extraction head 100, thereby greatly reducing the difficulty of installing and disassembling the extraction component 300 and greatly improving the ease of use of the portable coffee machine 20 with pressure slag removal function.

[0029] The aforementioned quick-release coffee extraction structure 10, when the pushing end of the elastic telescopic collar 210 slides to the first position of the extraction head 100, moves away from the sliding holding limit member 220; when the pushing end of the elastic telescopic collar 210 slides to the second position of the extraction head 100, the pushing end of the elastic telescopic collar 210 pushes each sliding holding limit member 220 partially protrude out of the limiting through hole 112 and extend into the docking groove 110, so that each sliding holding limit member 220... The 20 components simultaneously abut and press against the outer peripheral wall of the extraction assembly 300, so that multiple sliding pressing and limiting members 220 jointly clamp and fix the extraction assembly 300; and the elastic end of the elastic telescopic collar 210 elastically supports the pushing end of the elastic telescopic collar 210 at the second position of the extraction head 100. When it is necessary to mate the extraction assembly 300 with the docking groove 110, it is only necessary to first push the pushing end of the elastic telescopic collar 210 from the second position of the extraction head 100 to the first position of the extraction head 100, and then mate the extraction assembly 300 with the docking groove 110. The extraction head 100 is aligned with the extraction groove 110. Then, the push of the elastic telescopic collar 210 is stopped, allowing the elastic end of the collar 210 to be pushed back to the second position of the extraction head 100 through its elastic deformation. This allows multiple sliding holding and limiting members 220 to clamp and fix the extraction assembly 300, achieving a secure connection between the extraction assembly 300 and the extraction groove 110. When it is necessary to separate the extraction assembly 300 from the extraction head 100, only the elastic telescopic collar needs to be pushed. The pushing end of the elastic telescopic collar 210 slides from the second position of the extraction head 100 to the first position of the extraction head 100, so that the pushing end of the elastic telescopic collar 210 moves away from the sliding pressure limiting member 220, eliminating the pressure of the sliding pressure limiting member 220 on the outer peripheral wall of the extraction assembly 300, so that the user can easily separate the extraction assembly 300 from the extraction head 100, thereby greatly reducing the difficulty of installing and disassembling the extraction assembly 300, and thus greatly improving the ease of use of the portable coffee machine 20 with pressure slag removal function.

[0030] like Figures 1 to 6 As shown, in this embodiment, the number of limiting through holes 112 and sliding pressing limiting members 220 is at least three. The multiple limiting through holes 112 are evenly distributed along the circumference of the extraction head, and the multiple limiting through holes 112 and the multiple pressing limiting members 220 are arranged in a one-to-one correspondence.

[0031] It is understandable that the grounds removal process of the portable coffee machine mentioned above requires disassembling the extraction support and then flipping the filter cup to align with the discharge port. However, the filter cup and coffee grounds are still hot after brewing, and users are very likely to be burned during the flipping process, posing a safety hazard. At the same time, the multi-step operation process of disassembly-flipping-grounds removal is cumbersome and complicated, which not only reduces the ease of use of the portable coffee machine, but also prolongs the interval between two brews, affecting the coffee extraction efficiency.

[0032] like Figures 1 to 8 As shown, in one embodiment, the extraction assembly 300 includes an extraction frame 310 and a powder-carrying filter cup 320. The extraction frame 310 is connected to the docking groove 110. The extraction frame 310 has a first connection port 311, a mounting cavity 312, and a second connection port 313 connected in sequence. The powder-carrying filter cup 320 is installed in the mounting cavity 312, with the cup opening of the powder-carrying filter cup 320 facing and connected to the first connection port 311. The bottom of the powder-carrying filter cup 320 has a plurality of evenly distributed filter holes 321. The first connection port 311 is formed on the end face of the first docking portion 314 of the extraction frame 310, and the second connection port 313 is formed on the end face of the second docking portion 315 of the extraction frame 310. During the extraction operation, the first docking portion 314 is sealed and connected to the docking groove 110 to... The first connection port 311 is connected to the docking groove 110. During the dredging operation, the second docking part 315 is sealed and docked with the docking groove 110, so that the second connection port 313 is connected to the docking groove 110. Compared with the portable coffee machine in the related technology, which requires disassembly and flipping of the filter cup during the dredging preparation stage, the quick-disassembly coffee extraction structure disclosed herein only needs to flip the extraction rack 310 to complete the mode switching of extraction and dredging. This allows the filter cup 320 to be flipped synchronously without disassembly, which not only simplifies the dredging operation steps of the portable coffee machine 20 with pressure dredging function, but also effectively reduces the risk of burns, thereby greatly improving the safety of use and coffee extraction efficiency of the portable coffee machine 20 with pressure dredging function.

[0033] like Figures 1 to 6 As shown, in one embodiment, during the extraction operation, the pushing end of the elastic telescopic collar 210 pushes each sliding pressing limit member 220 to simultaneously abut and press against the outer peripheral wall of the first docking part 314, so as to clamp and limit the first docking part 314 within the docking groove 110; during the slag removal operation, the pushing end of the elastic telescopic collar 210 pushes each sliding pressing limit member 220 to simultaneously abut and press against the outer peripheral wall of the second docking part 315, so as to clamp and limit the second docking part 315 within the docking groove 110, so that the extraction rack 310 can be reliably docked with the extraction head 100, effectively reducing the risk of the extraction rack 310 becoming loose during the operation of the portable coffee machine 20 with pressure slag removal function, thereby greatly improving the safety and stability of the portable coffee machine 20 with pressure slag removal function.

[0034] like Figures 2 to 7As shown, in one embodiment, the elastic telescopic collar 210 includes a telescopic sleeve 211 and an elastic element 212. The pushing end of the elastic telescopic collar 210 is disposed on the telescopic sleeve 211, and the elastic end of the elastic telescopic collar 210 is disposed on the elastic element 212. The telescopic sleeve 211 is sleeved on the extraction head 100, and the inner peripheral wall of the telescopic sleeve 211 slides against the outer peripheral wall of the extraction head 100. The pushing end of the telescopic sleeve 211 is opposite to the sliding pressing and limiting member 220. The elastic element 212 is disposed between the telescopic sleeve 211 and the fixed end of the extraction head 100, and its elasticity... Both ends of the elastic element 212 are elastically connected to the telescopic sleeve 211 and the fixed end of the extraction head 100, respectively, so that when the telescopic sleeve 211 is pushed from the second position to the first position of the extraction head 100, the elastic element 212 can provide sufficient sliding stroke through its own elastic deformation. When the telescopic sleeve 211 is stopped, the elastic element 212 can push the pushing end of the elastic telescopic ring 210 back to the second position of the extraction head 100 by its own elastic restoring force, thereby greatly improving the ease of operation of the coffee extraction structure 10 that can be quickly disassembled and assembled.

[0035] like Figure 7 As shown, in this embodiment, the elastic element 212 is a spring, so that the elastic element 212 can have better elastic properties.

[0036] like Figures 1 to 6 As shown, in one embodiment, the extraction head 100 includes a fixing part 120 and an extraction part 130 fixed to each other. The fixing end of the extraction head 100 is disposed in the fixing part 120, and the extraction end of the extraction head 100 is disposed in the extraction part 130. The extraction part 130 is used to install and fix to the liquid outlet end of the portable coffee machine 20 with pressure slag removal function through the fixing part 120. The telescopic sleeve 211 is sleeved on the extraction part 130, and the inner peripheral wall of the telescopic sleeve 211 slides against the outer peripheral wall of the extraction part 130. The mating groove 110 is formed on the end face of the extraction part 130 away from the fixing part 120. The elastic member 212 is disposed between the telescopic sleeve 211 and the fixing part 120, and the two ends of the elastic member 212 are respectively connected to the telescopic sleeve 211. The telescopic sleeve 211 is elastically connected to the extraction head 130, allowing the user to slide the telescopic sleeve 211 relative to the extraction head 100. This enables the user to lock or disassemble the extraction frame 310 by sliding the telescopic sleeve 211 to the first or second position of the extraction head 100. Simultaneously, the elastic element 212 can also elastically support the telescopic sleeve 211 at the second position of the extraction head 100 through its own elastic properties, allowing multiple sliding pressure limiting elements 220 to jointly clamp and fix the extraction frame 310. This ensures that the extraction frame 310 is securely connected to the extraction head 130, thereby greatly improving the stability and ease of use of the portable coffee machine 20 with pressure slag removal function.

[0037] like Figures 1 to 7As shown, in one embodiment, the telescopic sleeve 211 is sequentially provided with a connecting portion 2111, a pushing portion 2112, and a limiting portion 2113. The pushing end of the telescopic sleeve 211 is located at the pushing portion 2112. The connecting portion 2111 and the fixing portion 120 are disposed opposite each other. The elastic member 212 is disposed between the connecting portion 2111 and the fixing portion 120, and both ends of the elastic member 212 are elastically connected to the connecting portion 2111 and the fixing portion 120, respectively. The pushing portion 2112 slides against the outer peripheral wall of the extraction portion 130. The limiting portion 2113 has a guide limiting surface 2113a formed on one side adjacent to the sliding pressing limiting member 220. The guide limiting surface 2113a faces... Extending obliquely away from the sliding holding limit member 220, the inner wall of the limiting through hole 112 near the docking groove 110 has a protruding annular limiting flange 1121. This allows the sliding holding limit member 220 to move along the guiding direction of the guiding limiting surface 2113a towards the pushing part 2112 during the process of the pushing part 2112 sliding from the first position of the extraction head 100 to the second position, until it abuts against the pushing part 2112. This avoids motion interference between the sliding holding limit member 220 and the pushing part 2112, thereby greatly improving the ease of operation of the quickly detachable coffee extraction structure 10 and making it more convenient to use. For stability; when the telescopic sleeve 211 slides to the first position of the extraction head 100, the limiting part 2113 covers the limiting through hole 112, so that the limiting part 2113 and the outer peripheral wall of the extraction part 130 together form the avoidance area 213 through the guide limiting surface 2113a, and the annular limiting flange 1121 and the limiting part 2113 together limit the sliding holding limiting member 220 in the limiting through hole 112, so that the avoidance area 213 can provide sufficient avoidance space for the sliding holding limiting member 220, effectively eliminating the holding force between the sliding holding limiting member 220 and the extraction frame 310, and at the same time preventing the sliding holding limiting member 220 from falling out of the limiting through hole 112. The two disengagements greatly improve the stability of the quick-release coffee extraction structure 10. When the telescopic sleeve 211 slides to the second position of the extraction head 100, the pushing part 2112 covers each limiting through hole 112 and pushes each sliding pressing limit member 220 to simultaneously abut and press against the outer peripheral wall of the extraction frame 310, so that multiple sliding pressing limit members 220 jointly clamp and fix the extraction frame 310. The elastic member 212 elastically supports the telescopic sleeve 211 at the second position of the extraction head 100, so that the extraction frame 310 is firmly connected to the extraction part 130, further improving the stability of the quick-release coffee extraction structure 10.

[0038] like Figures 2 to 7As shown, in one embodiment, the connecting part 2111 has an annular retaining flange 2111a protruding from the outer periphery of the side opposite to the pushing part 2112. The annular retaining flange 2111a is sleeved on the fixing part 120 and slides against the outer peripheral wall of the fixing part 120. The annular retaining flange 2111a and the extraction part 130 together form a retaining protection zone 214. The elastic member 212 is located in the retaining protection zone 214 so that the annular retaining flange 2111a can effectively retain and protect the elastic member 212, effectively reducing the risk of the elastic member 212 being interfered with by external factors during the use of the portable coffee machine 20 with pressure slag discharge function, thereby greatly improving the stability of the use of the coffee extraction structure 10 that can be quickly disassembled and assembled.

[0039] like Figure 3 and Figure 8 As shown, in one embodiment, the outer peripheral wall of the first docking portion 314 is provided with an annular support limiting flange 3141. When the pushing end of the elastic telescopic collar 210 slides to the second position of the extraction head 100, each sliding pressing limiting member 220 not only simultaneously abuts against and supports the annular support limiting flange 3141, but also simultaneously abuts against and presses against the outer peripheral wall of the first docking portion 314, so that multiple sliding pressing limiting members 220 jointly clamp and fix the first docking portion 314, so that the first docking portion 314 can be more securely limited in the docking groove 110, reducing the risk of the extraction rack 310 loosening during the extraction operation, thereby significantly improving the stability of the use of the coffee extraction structure 10 that can be quickly disassembled and assembled.

[0040] like Figure 3 and Figure 8 As shown, in one embodiment, a first guide slope 3141a is formed on one side of the annular support limiting flange 3141 adjacent to the second docking portion 315. The first guide slope 3141a extends obliquely away from the second docking portion 315, so that when it is necessary to disassemble the first docking portion 314 from the docking groove 110, it is only necessary to slide the telescopic sleeve 211 to the first position of the extraction head 100 and pull the extraction frame 310 away from the extraction head 100. This allows the sliding holding limiting member 220 to slide away from the extraction frame 310 along the guiding direction of the first guide slope 3141a and disengage from the annular support limiting flange 3141, so as to avoid the phenomenon of motion interference between the sliding holding limiting member 220 and the annular support limiting flange 3141. This allows the extraction frame 310 to be easily and smoothly disassembled from the extraction head 100.

[0041] like Figure 3 and Figure 8As shown, in one embodiment, a second guide slope 3141b is formed on the side of the annular support limiting flange 3141 facing away from the second docking portion 315. The second guide slope 3141b extends obliquely toward the second docking portion 315, so that when the first docking portion 314 needs to be installed and docked in the docking groove 110, it is only necessary to push the first docking portion 314 into the docking groove 110 after the telescopic sleeve 211 slides to the first position of the extraction head 100, so that the sliding pressing limiting member 220 can move along the second guide slope 3141b. b slides away from the extraction rack 310 and disengages from the annular support limiting flange 3141 to avoid motion interference between the sliding holding limiting member 220 and the annular support limiting flange 3141, thereby allowing the first docking part 314 to be easily and smoothly pushed into the docking groove 110; finally, the push of the telescopic sleeve 211 is stopped, so that the telescopic sleeve 211 can be reset to the second position of the extraction head 100 through the elastic member 212, thereby allowing the first docking part 314 to be securely limited in the docking groove 110.

[0042] like Figure 5 and Figure 8 As shown, in one embodiment, the outer peripheral wall of the second docking portion 315 is formed with a rough limiting surface 3151. When the pushing end of the elastic telescopic collar 210 slides to the second position of the extraction head 100, each sliding pressing limiting member 220 simultaneously abuts and presses against the rough limiting surface 3151 to increase the friction coefficient between the sliding pressing limiting member 220 and the outer peripheral wall of the second docking portion 315, thereby increasing the frictional resistance between the sliding pressing limiting member 220 and the outer peripheral wall of the second docking portion 315. This allows the second docking portion 315 to be reliably limited within the docking groove 110 by the sliding pressing limiting member 220, thereby greatly improving the stability of the use of the coffee extraction structure 10 that can be quickly disassembled and assembled.

[0043] like Figure 8 As shown, in one embodiment, the rough limiting surface is knurled to give it a high coefficient of friction.

[0044] like Figure 3 As shown, in one embodiment, the sliding holding limit member 220 has a spherical structure to reduce the contact area between the sliding holding limit member 220 and the hole wall of the limiting through hole 112, reduce the frictional resistance of the sliding holding limit member 220, and enable the sliding holding limit member 220 to slide smoothly along the guiding direction of the limiting through hole 112.

[0045] like Figures 2 to 3As shown, in one embodiment, the annular limiting flange 1121 has an inclined surface 1121a on one side facing away from the docking groove 110. The inclined surface 1121a extends obliquely away from the sliding holding limiting member 220 to extend the effective length of the sliding holding limiting member 220 protruding out of the limiting through hole 112 and extending into the docking groove 110. This makes the sliding holding limiting member 220 form a more reliable abutting and holding effect on the outer peripheral wall of the extraction frame 310, thereby greatly improving the stability of the use of the coffee extraction structure 10 that can be quickly disassembled and assembled.

[0046] like Figures 2 to 3 As shown, in one embodiment, a first sealing ring 113 is fixed to the inner peripheral wall of the docking groove 110. During the extraction operation, the two sides of the first sealing ring 113 are respectively press-fitted against the inner peripheral wall of the docking groove 110 and the outer peripheral wall of the first docking part 314, so that the first sealing ring 113 can effectively seal the gap between the inner peripheral wall of the docking groove 110 and the outer peripheral wall of the first docking part 314. When the extraction operation is performed, the first sealing ring 113 can effectively prevent liquid from leaking from the gap between the inner peripheral wall of the docking groove 110 and the outer peripheral wall of the first docking part 314. This not only effectively ensures the extraction effect of the portable coffee machine 20 with pressure slag removal function, but also prevents the leakage of high temperature liquid and the resulting burns. At the same time, it also makes the first docking part 314 more securely confined in the docking groove 110 by the clamping and limiting effect of the first sealing ring 113 and the frictional resistance, thereby greatly improving the stability and safety of the portable coffee machine 20 with pressure slag removal function.

[0047] like Figures 2 to 3 As shown, in one embodiment, the inner peripheral wall of the docking groove 110 is formed with a first annular limiting groove 114. A first sealing ring 113 is disposed in the first annular limiting groove 114 and is in interference contact with the inner wall of the first annular limiting groove 114. The first sealing ring 113 protrudes from the first annular limiting groove 114. During the extraction operation, the first sealing ring 113 is in interference contact with the outer peripheral wall of the first docking portion 314, so that the first sealing ring 113 can not only be reliably limited in the first annular limiting groove 114, but also greatly increase the interference contact area between the first sealing ring 113 and the inner wall of the docking groove 110, further improving the sealing effect between the inner peripheral wall of the docking groove 110 and the outer peripheral wall of the first docking portion 314.

[0048] like Figures 2 to 5As shown, in one embodiment, the bottom of the docking groove 110 is provided with a liquid outlet 115, and the liquid outlet 111 is disposed on the end face of the liquid outlet 115. During the extraction operation, the liquid outlet 115 extends into the mounting cavity 312 through the first connection port 311. A second sealing ring 3121 is fixed to the mounting cavity 312 near the second connection port 313. During the slag discharge operation, the liquid outlet 115 extends into the mounting cavity 312 through the second connection port 313, and the two sides of the second sealing ring 3121 are respectively press-fitted against the inner peripheral wall of the mounting cavity 312 and the outer peripheral wall of the liquid outlet 115, so that the second sealing ring 3121 can effectively seal the inner wall of the mounting cavity 312. The gap between the inner wall of the mounting cavity 312 and the outer wall of the liquid outlet 115 allows the second sealing ring 3121 to effectively prevent high-pressure gas from leaking from the gap between the inner wall of the mounting cavity 312 and the outer wall of the liquid outlet 115 during the slag removal operation. This ensures that there is sufficient pressure in the mounting cavity 312 to push the coffee grounds out of the coffee cup, thus guaranteeing the slag removal effect of the portable coffee machine 20 with pressure slag removal function. At the same time, it also allows the second docking part 315 to be more securely confined within the docking groove 110 through the clamping and limiting effect of the second sealing ring 3121 and the frictional resistance, thereby greatly improving the operational stability of the portable coffee machine 20 with pressure slag removal function.

[0049] like Figures 4 to 5 As shown, in one embodiment, a second annular limiting groove 3122 is formed on the inner peripheral wall of the mounting cavity 312 near the second connection port 313. A second sealing ring 3121 is disposed in the second annular limiting groove 3122 and is in interference fit with the inner wall of the second annular limiting groove 3122. The second sealing ring 3121 protrudes from the second annular limiting groove 3122. During the slag discharge operation, the second sealing ring 3121 is in interference fit with the outer peripheral wall of the liquid outlet 115, so that the second sealing ring 3121 can not only be reliably limited in the second annular limiting groove 3122, but also greatly increase the interference fit area between the second sealing ring 3121 and the inner peripheral wall of the mounting cavity 312, further improving the sealing effect between the inner peripheral wall of the mounting cavity 312 and the outer peripheral wall of the liquid outlet 115.

[0050] like Figures 2 to 5As shown, in one embodiment, a third sealing ring 3123 is provided between the outer peripheral wall of the powder-carrying filter cup 320 and the inner peripheral wall of the mounting cavity 312. The two sides of the third sealing ring 3123 respectively press against the outer peripheral wall of the powder-carrying filter cup 320 and the inner peripheral wall of the mounting cavity 312 to seal the gap between them. This ensures that during extraction, the third sealing ring 3123 effectively prevents liquid from leaking out of the gap between the outer peripheral wall of the powder-carrying filter cup 320 and the inner peripheral wall of the mounting cavity 312. This effectively prevents leakage and ensures the extraction effect of the portable coffee machine 20 with pressure churn function. When churning, the third sealing ring 3123 can effectively prevent high-pressure gas from leaking from the gap between the outer peripheral wall of the powder filter cup 320 and the inner peripheral wall of the mounting cavity 312, ensuring that sufficient pressure can be accumulated in the mounting cavity 312 to push the coffee grounds out of the powder cup, thus ensuring the churn effect of the portable coffee machine 20 with pressure churn function and greatly improving the stability of the portable coffee machine 20 with pressure churn function.

[0051] like Figures 2 to 5 As shown, in one embodiment, the inner peripheral wall of the mounting cavity 312 forms a third annular limiting groove 3124. A third sealing ring 3123 is disposed in the third annular limiting groove 3124 and is in interference fit with the inner wall of the third annular limiting groove 3124. The third sealing ring 3123 protrudes from the third annular limiting groove 3124. During the slag discharge operation, the third sealing ring 3123 is in interference fit with the outer peripheral wall of the powder-carrying filter cup 320, so that the third sealing ring 3123 can not only be reliably limited in the third annular limiting groove 3124, but also greatly increases the interference fit area between the third sealing ring 3123 and the inner peripheral wall of the mounting cavity 312, further improving the sealing effect between the outer peripheral wall of the powder-carrying filter cup 320 and the inner peripheral wall of the mounting cavity 312. At the same time, it also makes the powder-carrying filter cup 320 more reliably limited in the mounting cavity 312 through the clamping and limiting effect of the third sealing ring 3123 and the frictional resistance.

[0052] like Figures 2 to 5 As shown, in one embodiment, the first sealing ring 113, the second sealing ring 3121, and the third sealing ring 3123 are all food-grade fumed silicone rubber rings, food-grade fluorosilicone rubber rings, or food-grade EPDM rubber rings, so that the first sealing ring 113, the second sealing ring 3121, and the third sealing ring 3123 can all have good sealing performance, high temperature resistance, and elasticity.

[0053] like Figures 2 to 3As shown, in one embodiment, an annular limiting ring 140 is fixed to the outer peripheral wall of the extraction head 100. The annular limiting ring 140 is disposed between the limiting through hole 112 and the extraction end face of the extraction head 100. The annular limiting ring 140 is used to abut against the support pushing part 2112, so that the elastic member 212 and the annular limiting ring 140 together clamp and limit the telescopic sleeve 211 at the second position of the extraction head 100, so that the pushing part 2112 can maintain the state of pushing each sliding pressing limiting member 220 to abut against the outer peripheral wall of the first docking part 314, thereby improving the stability of the use of the coffee extraction structure 10 that can be quickly disassembled and assembled.

[0054] like Figures 2 to 3 As shown, in one embodiment, an annular locking groove 150 is formed on the outer peripheral wall of the extraction head 100. The annular locking groove 150 is formed between the limiting through hole 112 and the extraction end face of the extraction head 100. An annular limiting ring 140 is locked and fixed in the annular locking groove 150, and a portion of the annular limiting ring 140 protrudes from the annular locking groove 150. The portion of the annular limiting ring 140 protruding from the annular locking groove 150 is used to abut against the supporting pushing part 2112, so that the annular limiting ring 140 can be reliably limited between the limiting through hole 112 and the extraction end face of the extraction head 100 through the annular locking groove 150, so that the annular limiting ring 140 can effectively support and limit the pushing part 2112 at the second position of the extraction head 100.

[0055] This disclosure also provides a portable coffee machine 20 with pressure slag removal function, including the coffee extraction structure 10 that can be quickly disassembled and assembled as described in any of the above embodiments, and the extraction head 100 is installed and fixed to the liquid outlet end of the portable coffee machine 20 with pressure slag removal function.

[0056] Compared with the prior art, this disclosure has at least the following advantages: The aforementioned portable coffee machine 20 with pressure slag removal function, when the pushing end of the elastic telescopic collar 210 slides to the first position of the extraction head 100, the pushing end of the elastic telescopic collar 210 moves away from the sliding holding limit member 220; when the pushing end of the elastic telescopic collar 210 slides to the second position of the extraction head 100, the pushing end of the elastic telescopic collar 210 pushes each sliding holding limit member 220 part to protrude out of the limiting through hole 112 and extend into the docking groove 110, so that each sliding holding limit member 220... The components 220 simultaneously abut and press against the outer peripheral wall of the extraction assembly 300, so that multiple sliding pressing and limiting components 220 together clamp and fix the extraction assembly 300; and the elastic end of the elastic telescopic collar 210 elastically supports the pushing end of the elastic telescopic collar 210 at the second position of the extraction head 100. When it is necessary to mate the extraction assembly 300 with the docking groove 110, it is only necessary to first push the pushing end of the elastic telescopic collar 210 from the second position of the extraction head 100 to the first position of the extraction head 100, and then mate the extraction assembly 300 with the docking groove 110. The extraction head 100 is aligned with the extraction groove 110. Then, the push of the elastic telescopic collar 210 is stopped, allowing the elastic end of the elastic telescopic collar 210 to be pushed back to the second position of the extraction head 100 through its own elastic deformation. This allows multiple sliding holding and limiting members 220 to jointly clamp and fix the extraction assembly 300, achieving a reliable connection between the extraction assembly 300 and the extraction groove 110. When it is necessary to separate the extraction assembly 300 from the extraction head 100, only the elastic telescopic collar needs to be pushed. The pushing end of the ring 210 slides from the second position of the extraction head 100 to the first position of the extraction head 100, so that the pushing end of the elastic telescopic ring 210 moves away from the sliding pressure limiting member 220, eliminating the pressure of the sliding pressure limiting member 220 on the outer peripheral wall of the extraction assembly 300, so that the user can easily separate the extraction assembly 300 from the extraction head 100, thereby greatly reducing the difficulty of installing and disassembling the extraction assembly 300, and thus greatly improving the ease of use of the portable coffee machine 20 with pressure slag removal function.

[0057] The embodiments described above are merely illustrative of several implementations of this disclosure, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the disclosed patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this disclosure, and these all fall within the protection scope of this disclosure. Therefore, the protection scope of this patent should be determined by the appended claims.

Claims

1. A coffee extraction structure that can be quickly assembled and disassembled, characterized in that, Includes extraction head, quick-release assembly, and extraction assembly; The extraction head is used to install and fix it to the liquid outlet of a portable coffee machine with pressure slag removal function; a docking groove is formed on the extraction end face of the extraction head, and a liquid outlet is provided at the bottom of the docking groove; The quick-assembly assembly includes an elastic telescopic collar and a sliding holding limiter. The elastic telescopic collar is slidably sleeved on the extraction head, and the elastic end of the elastic telescopic collar is elastically connected to the fixed end face of the extraction head. The inner peripheral wall of the docking groove is formed with multiple limiting through holes, which are evenly spaced. The number of sliding holding limiters is the same as the number of limiting through holes. Each sliding holding limiter is limited in the limiting through hole and slides against the hole wall of the corresponding limiting through hole. The pushing end of the elastic telescopic collar is opposite to each sliding holding limiter, and the length of the sliding holding limiter is greater than the length of the limiting through hole. When the pushing end of the elastic telescopic collar slides to the first position of the extraction head, the pushing end of the elastic telescopic collar moves away from the sliding pressure limiting member; When the pushing end of the elastic telescopic collar slides to the second position of the extraction head, the pushing end of the elastic telescopic collar pushes each of the sliding pressing and limiting members to protrude from the limiting through hole and extend into the docking groove, so that each of the sliding pressing and limiting members simultaneously abuts and presses against the outer peripheral wall of the extraction assembly, so that multiple sliding pressing and limiting members jointly clamp and fix the extraction assembly; and the elastic end of the elastic telescopic collar elastically supports the pushing end of the elastic telescopic collar at the second position of the extraction head.

2. The coffee extraction structure that can be quickly disassembled and assembled according to claim 1, characterized in that, The extraction assembly includes an extraction frame and a powder-carrying filter cup. The extraction frame is docked to the docking groove. The extraction frame has a first connection port, an installation cavity, and a second connection port that are sequentially connected. The powder-carrying filter cup is installed in the installation cavity. The opening of the powder-carrying filter cup faces the first connection port and is connected to it. The bottom of the powder-carrying filter cup has a plurality of evenly distributed filter holes. The first connection port is formed on the end face of the first docking part of the extraction frame, and the second connection port is formed on the end face of the second docking part of the extraction frame. During the extraction operation, the first docking part is sealed and docked with the docking groove so that the first connection port is connected to the docking groove; During the slag discharge operation, the second docking part is sealed and docked with the docking groove so that the second connection port is connected to the docking groove.

3. The coffee extraction structure that can be quickly disassembled and assembled according to claim 2, characterized in that, During the extraction operation, the pushing end of the elastic telescopic collar pushes each of the sliding pressing and limiting members to simultaneously abut and press against the outer peripheral wall of the first docking part, so as to clamp and limit the first docking part within the docking groove; During the slag discharge operation, the pushing end of the elastic telescopic collar pushes each of the sliding pressing and limiting members to simultaneously abut and press against the outer peripheral wall of the second docking part, so as to clamp and limit the second docking part within the docking groove.

4. The coffee extraction structure that can be quickly disassembled and assembled according to any one of claims 1 to 3, characterized in that, The elastic telescopic collar includes a telescopic sleeve and an elastic element. The pushing end of the elastic telescopic collar is disposed on the telescopic sleeve, and the elastic end of the elastic telescopic collar is disposed on the elastic element. The telescopic sleeve is sleeved on the extraction head. The inner peripheral wall of the telescopic sleeve slides against the outer peripheral wall of the extraction head. The pushing end of the telescopic sleeve is disposed opposite to the sliding pressing and limiting element. The elastic element is disposed between the telescopic sleeve and the fixed end of the extraction head, and both ends of the elastic element are elastically connected to the telescopic sleeve and the fixed end of the extraction head, respectively.

5. The coffee extraction structure that can be quickly disassembled and assembled according to claim 4, characterized in that, The extraction head includes a fixing part and an extraction part that are fixed to each other. The fixing end of the extraction head is located on the fixing part, and the extraction end of the extraction head is located on the extraction part. The extraction part is used to install and fix to the liquid outlet of the portable coffee machine with pressure slag removal function through the fixing part. The telescopic sleeve is fitted on the extraction part, and the inner peripheral wall of the telescopic sleeve slides against the outer peripheral wall of the extraction part. The docking groove is formed on the end face of the extraction part away from the fixing part. The elastic element is disposed between the telescopic sleeve and the fixing part, and the two ends of the elastic element are elastically connected to the telescopic sleeve and the fixing part, respectively.

6. The coffee extraction structure that can be quickly disassembled and assembled according to claim 5, characterized in that, The telescopic sleeve is provided with a connecting part, a pushing part and a limiting part in sequence. The pushing end of the telescopic sleeve is provided at the pushing part. The connecting part and the fixing part are arranged opposite to each other. The elastic element is provided between the connecting part and the fixing part, and the two ends of the elastic element are elastically connected to the connecting part and the fixing part respectively. A guide limiting surface is formed on one side of the limiting part adjacent to the sliding pressing limiting element. The guide limiting surface extends obliquely away from the sliding pressing limiting element. An annular limiting flange protrudes from the inner wall of the opening of the limiting through hole adjacent to the docking groove. When the telescopic sleeve slides to the first position of the extraction head, the limiting part covers the limiting through hole, so that the limiting part and the outer peripheral wall of the extraction part together form an avoidance area through the guide limiting surface, and the annular limiting flange and the limiting part together limit the sliding pressing limiting member to the limiting through hole. When the telescopic sleeve slides to the second position of the extraction head, the pushing part covers each of the limiting through holes and pushes each of the sliding pressing limiting members to simultaneously abut and press against the outer peripheral wall of the extraction frame, so that the multiple sliding pressing limiting members together clamp and fix the extraction frame; and the elastic member elastically supports the telescopic sleeve at the second position of the extraction head.

7. The coffee extraction structure that can be quickly disassembled and assembled according to claim 3, characterized in that, The outer peripheral wall of the first docking portion is provided with an annular support and limiting flange. When the pushing end of the elastic telescopic collar slides to the second position of the extraction head, each of the sliding pressing and limiting members simultaneously abuts and supports against the annular support and limiting flange; and / or, The outer peripheral wall of the second docking part is formed with a rough limiting surface. When the pushing end of the elastic telescopic collar slides to the second position of the extraction head, each of the sliding pressing limiting members simultaneously abuts and presses against the rough limiting surface.

8. The coffee extraction structure that can be quickly disassembled and assembled according to claim 2, characterized in that, A first sealing ring is fixed to the inner peripheral wall of the docking groove. During the extraction operation, the two sides of the first sealing ring respectively press against the inner peripheral wall of the docking groove and the outer peripheral wall of the first docking portion; and / or, The bottom of the docking groove is provided with a liquid outlet, and the liquid outlet is located on the end face of the liquid outlet. During the slag discharge operation, the liquid outlet extends into the mounting cavity through the second connection port. A second sealing ring is fixed to the mounting cavity near the second connection port. During the slag discharge operation, the liquid outlet extends into the mounting cavity through the second connection port, and the two sides of the second sealing ring respectively press against the inner peripheral wall of the mounting cavity and the outer peripheral wall of the liquid outlet.

9. The coffee extraction structure that can be quickly disassembled and assembled according to claim 2, characterized in that, An annular limiting ring is fixed to the outer peripheral wall of the extraction head. The annular limiting ring is disposed between the limiting through hole and the extraction end face of the extraction head. The annular limiting ring is used to abut and support the pushing part so that the elastic element and the annular limiting ring together clamp and limit the telescopic sleeve to the second position of the extraction head.

10. A portable coffee machine with pressure-discharge function, characterized in that, The invention includes a coffee extraction structure that can be quickly disassembled and assembled according to any one of claims 1 to 9, wherein the extraction head is installed and fixed to the liquid outlet end of the portable coffee machine with pressure slag removal function.

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