Filter screen assembly and portable coffee machine with same for grinding and brewing beans

Abstract

The filter screen assembly comprises a filter screen main body and a plurality of rotary type supporting arms, the filter screen main body comprises an upper leading-in cup body and a lower filter screen, the top end of the lower filter screen is connected with the bottom end of the upper leading-in cup body, and the lower filter screen is connected with the bottom end of the lower leading-in cup body. Each rotary supporting arm is rotationally connected with the outer wall surface of the upper leading-in cup body; when the multiple rotary supporting arms are horizontally rotated outwards to be opened, the overall outer circumferential diameter of the multiple rotary supporting arms is larger than the outer circumferential diameter of the upper leading-in cup body, and the multiple rotary supporting arms are used as a supporting frame for brewing and filtering; and when the plurality of rotary supporting arms are horizontally rotated and folded inwards, the plurality of rotary supporting arms are rotated, folded and stored on the outer wall surface of the upper leading-in cup body. The coffee making filtering performance can be improved for the bean grinding and brewing integrated coffee machine, the drinking requirement for instant coffee brewing in the field or under the power failure condition can be met, and the use experience flexibility of a user is improved.

Description

Technical Field

[0001] This utility model relates to a coffee grinder, and more particularly to a coffee grinder that integrates grinding and brewing. Background Technology

[0002] A coffee grinder is a coffee machine with a built-in coffee bean grinding function. It includes the main body, brewing, hot water supply, and grinding mechanisms, all housed within the main body. The powder outlet of the grinding mechanism and the water outlet of the hot water supply mechanism are connected to the inlet of the brewing mechanism, allowing the ground coffee powder and hot water to mix within the brewing mechanism. The resulting coffee liquid then flows from the outlet of the brewing mechanism into a coffee container. However, existing coffee grinders and brewers typically adjust the grind size to directly brew the ground coffee powder, which may result in a lack of fineness in the brewed coffee. Furthermore, these machines are only used for brewing ground coffee, leading to a lengthy preparation process. This makes them unsuitable for immediate coffee brewing needs, especially in situations like outdoors or during power outages, resulting in limited user flexibility.

[0003] Patent No. ZL 202322113811.X, published on April 9, 2024, discloses a portable coffee grinder, belonging to the field of coffee machine technology. This coffee grinder includes: a coffee cup; a coffee filter disposed inside the coffee cup; a grinding assembly detachably connected to the coffee cup for grinding coffee beans into coffee powder and feeding the ground coffee powder into the coffee filter; and a water tank assembly including a water storage tank and a drip valve disposed on the water storage tank. The water storage tank is detachably connected to the coffee cup, and when connected, the water storage tank can move relative to the coffee cup, causing the drip valve to move relative to the water storage tank to open or close, thereby connecting or disconnecting the water storage tank from the coffee cup. This portable coffee grinder meets the user's need for fresh coffee during outdoor activities. However, this coffee grinder uses a design where a first rib 20 is provided on the outer peripheral wall of the coffee filter 2, surrounding the filter 2. A second rib 10 is provided on the inner wall of the coffee cup 1 near the rim. When the coffee filter 2 is placed inside the coffee cup 1, the second rib 10 abuts against the first rib 20, supporting the entire coffee filter 2 to allow for insertion or removal. This design results in a fixed and unique fit between the coffee filter and the coffee cup, meaning the filter can only function with that specific cup. It cannot effectively meet the need for instant coffee brewing in outdoor or power outage situations, leading to poor user flexibility. Utility Model Content

[0004] This utility model addresses the shortcomings of existing coffee grinders and brewers, such as their inability to effectively meet the need for instant coffee brewing in outdoor or power outage situations, and their poor user experience flexibility. It provides a filter assembly and a portable coffee grinder / brewer equipped with this filter assembly, which enhances the filtering capabilities of the coffee grinder / brewer and enables instant coffee brewing in outdoor or power outage situations, thereby improving user experience flexibility.

[0005] The specific technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: a filter assembly, characterized in that it includes a filter body and multiple rotating support arms. The filter body includes an upper inlet cup and a lower filter. The top end of the lower filter is connected to the bottom end of the upper inlet cup. Each rotating support arm is vertically and rotatably connected to the outer wall of the upper inlet cup. When the multiple rotating support arms are opened horizontally outward, the overall outer circumference of the multiple rotating support arms is larger than the outer circumference of the upper inlet cup, and they are used as supports for brewing and filtering. When the multiple rotating support arms are folded horizontally inward, they are rotated and folded and stored on the outer wall of the upper inlet cup. The different usage states of the multiple rotating support arms, such as opening or folding, combined with the filtering function of the lower filter, can not only increase the filtering capability of coffee preparation in an integrated coffee grinder and brewer, but also meet the need for instant suspended coffee brewing in the field or in the event of a power outage, thus improving the flexibility of the user experience. Furthermore, the span of the support frame can be adjusted by varying the outward opening degree of the multiple rotating support arms in the folding support arm filter assembly. It can be installed and used on portable coffee makers, or mounted on the coffee container of a portable coffee maker for suspended brewing and filtration. It can also flexibly and effectively meet the needs of instant suspended brewing of coffee or other tea drinks on cup-shaped containers such as glasses and travel jugs with different rim circumferences, making it flexible, convenient, and versatile for various brewing and filtration scenarios.

[0006] Preferably, the lower filter screen adopts an inverted frustum-shaped filter screen structure, or a cylindrical or barrel-shaped filter screen structure. When using an inverted frustum-shaped filter screen structure, the outer circumference of the top end of the lower filter screen is larger than the outer circumference of the bottom end of the lower filter screen, and the top end of the lower filter screen is connected to the bottom end of the upper inlet cup. This forms a filter screen structure with a certain height dimension, improving the effective filtration effect of the filter screen structure sinking when supported by multiple rotating support arms on cup-shaped containers such as insulated cups, coffee cups, glass cups, travel jugs, and mugs with different cup mouth circumference sizes.

[0007] Preferably, the multiple rotary support arms employ a structure with 2 to 5 rotary support arms, which are evenly and vertically distributed and connected to the outer wall of the upper inlet cup. This improves the stability, reliability, and effectiveness of the filter assembly support frame when the multiple rotary support arms are rotated open, ensuring proper filtration.

[0008] Preferably, the multiple rotary support arms employ a three-arm structure, with the three rotary support arms evenly distributed vertically and connected to the outer wall of the upper inlet cup. This improves the stability, reliability, and effectiveness of the filter assembly support structure when the multiple rotary support arms are rotated open, ensuring proper filtration.

[0009] Preferably, each of the multiple rotary support arms is provided with a vertical through-pin hole. The multiple rotary support arms are rotatably connected to the outer wall of the upper inlet cup via their corresponding vertical through-pin holes using vertical pins or vertical posts. The vertical height of the vertical pin or vertical post is greater than the vertical height of the vertical through-pin hole. The outer wall of the upper inlet cup is provided with a positioning connection seat for positioning the vertical pin or vertical post. This improves the simplicity, flexibility, and effectiveness of the rotary opening support connection and rotary folding storage structure of the multiple rotary support arms.

[0010] Preferably, the outer wall of the upper inlet cup is provided with an outwardly protruding upper connecting positioning ring seat and a lower connecting fixing ring seat. The vertical distance between the upper connecting positioning ring seat and the lower connecting fixing ring seat is slightly larger than the vertical height of the multiple rotating support arms. This ensures that the multiple rotating support arms can freely rotate and open horizontally or rotate and fold inward for storage. The upper connecting positioning ring seat is fixedly connected to the outer wall of the upper inlet cup, and the lower connecting fixing ring seat is movably connected and fixed to the outer wall of the upper inlet cup. The upper connecting positioning ring seat has multiple vertically downward-opening upper positioning connection holes, and the lower connecting fixing ring seat has a vertically upward-opening lower positioning connection hole. The number of upper and lower positioning connection holes corresponds to the number of rotating support arms used. The multiple rotating support arms are rotatably connected to the outer wall of the upper inlet cup through the upper and lower positioning connection holes and vertical pins or vertical pins. This improves the simplicity, flexibility, and effectiveness of the rotating opening support connection and rotating folding storage structure of the multiple rotating support arms.

[0011] Preferably, the lower connecting fixing ring seat adopts a ring-shaped structure with a certain height. Multiple lower connecting fixing seats and several inner wall clips are provided on the inner wall of the ring structure. Each lower connecting fixing seat has a vertically upward-opening lower positioning connection hole, the number of which corresponds to the number of rotating support arms used. The several inner wall clips are used to engage with multiple outer wall clips provided on the outer wall of the upper inlet cup, thus fixing the lower connecting fixing ring seat to the outer wall of the upper inlet cup. This improves the simplicity, flexibility, and effectiveness of the rotating opening support connection and rotating folding storage structure of the multiple rotating support arms. The vertically tall ring structure provides sufficient safety height support and stability space for the lower positioning connection holes and vertical pins or vertical posts when installing and connecting the multiple rotating support arms.

[0012] Another objective of this invention is to provide a coffee grinder and brewer with a folding arm and filter assembly, comprising a grinder head body, characterized in that it further includes a coffee liquid container and the folding arm and filter assembly described in one of the above-mentioned technical solutions. When the grinder head body, the folding arm and filter assembly, and the coffee liquid container are assembled together, the folding arm and filter assembly is connected to the bottom end of the grinder head body and is located inside the coffee liquid container. The rotation and opening or folding of multiple rotating support arms, combined with the filtering function of the filter, not only enhances the filtering capabilities of the coffee grinder and brewer but also enables immediate, suspended coffee brewing in outdoor or power outage situations, improving user flexibility. Furthermore, the span of the support frame can be adjusted according to the different degrees to which the multiple rotating support arms in the folding arm and filter assembly open, effectively meeting the needs of instantly brewing coffee or other tea drinks using glass cups, travel jugs, and other cup-shaped containers with different rim diameters.

[0013] Preferably, the coffee container adopts a thermos container structure; the overall outer circumference of the multiple rotating support arms when they are opened horizontally outward is larger than the circumference of the coffee container's mouth; a detachable container lid is connected to the bottom of the coffee container. This improves the heat retention of the coffee container and enhances its ability to delay heat preservation when used for instant coffee or other tea brewing.

[0014] Preferably, the bottom end of the grinder head body is provided with a bottom fixing ring, and an annular groove is provided on the outer circumference of the bottom fixing ring. An O-ring is provided on the annular groove. The inner ring wall of the top of the upper inlet cup of the folding support arm functional filter assembly is sealed and connected to the bottom fixing ring at the bottom end of the grinder head body through the O-ring. This improves the ease, flexibility, and effectiveness of installing, connecting, filtering, disassembling, and setting up the folding support arm functional filter assembly to the bottom end of the grinder head body.

[0015] The beneficial effects of this invention are as follows: the multiple rotating support arms, which can be opened or folded for different uses, combined with the filtering function of the filter screen, not only enhance the filtering capabilities of coffee brewing in integrated coffee makers, but also enable instant suspended brewing of coffee in outdoor or power outage situations, improving user flexibility. Furthermore, the span of the support frame can be adjusted by varying the outward opening degree of the multiple rotating support arms in the folding arm filter assembly. It can be installed on portable coffee makers, or mounted on the coffee container within them for suspended brewing and filtering. It can also flexibly and effectively meet the needs of instant suspended brewing of coffee or other teas on glass cups, travel jugs, and other cup-shaped containers with different rim diameters, offering flexible and diverse brewing and filtering options.

[0016] Three or more evenly arranged rotating support arms are connected to the upper inlet cup of the filter body via corresponding vertical pins or vertical pin structures. They can be rotated outward horizontally to open or rotated inward horizontally to fold. When opened outward horizontally, the multiple rotating support arms can be mounted on the edge of the rim of containers such as thermos cups, glasses, travel jugs, and mugs to achieve "suspended brewing". When rotated inward horizontally and folded, they are located on the outer wall of the upper inlet cup for easy storage and to save space.

[0017] Multiple rotating support arms can be used for instant suspended brewing of various containers: The multiple rotating support arms can be rotated outwards and horizontally to open with an adjustable span, making them more suitable for brewing containers of different diameters, such as thermos cups, glass cups, travel jugs, and mugs. They replace the fixed drip tray of traditional coffee machines and increase the flexibility of use.

[0018] Instant and portable brewing: No need to rely on a coffee machine base. Simply rotate the rotating support arm outward horizontally to open the frame and attach it to the mouth of brewing containers such as thermos cups, glasses, travel jugs, and mugs of different diameters for manual and instant suspended brewing (such as pour-over coffee and American drip coffee). Suitable for outdoor, office and other scenarios, with a wide range of applications.

[0019] Easy to clean: The entire filter holder can be rinsed with water to avoid coffee grounds residue. Attached image description:

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a structural schematic diagram of the filter assembly of this utility model.

[0022] Figure 2 This is a schematic diagram of the exploded structure of the filter assembly of this utility model.

[0023] Figure 3 This is a schematic diagram of the filter assembly of this utility model and a portable coffee maker with the filter assembly.

[0024] Figure 4 This is a partial cross-sectional view of the filter assembly and the portable coffee maker with the filter assembly of this utility model.

[0025] Figure 5 This is a schematic diagram of the structure of the filter assembly of this utility model and the portable coffee maker with the filter assembly when they are assembled together.

[0026] Figure 6 This is a schematic diagram of the front view and top view of the filter assembly and the portable coffee maker with the filter assembly, when the filter assembly is placed on the mouth of a thermos or other container for instant coffee brewing. Detailed Implementation

[0027] Example 1:

[0028] Figure 1 , Figure 2 , Figure 4 In the illustrated embodiment, a filter assembly includes a filter body and multiple rotary support arms 30. The filter body includes an upper inlet cup 10 and a lower filter 20. The top end of the lower filter 20 is connected to the bottom end of the upper inlet cup 10. Each rotary support arm 30 is vertically and rotatably connected to the outer wall of the upper inlet cup 10. When the multiple rotary support arms 30 are horizontally rotated outward (which can also be understood as the multiple rotary support arms 30 being horizontally rotated outward relative to the vertical upper inlet cup 10, and the same applies to rotating and folding for storage), the overall outer circumference of the multiple rotary support arms is larger than the outer circumference of the upper inlet cup 10, and they are used as supports for brewing and filtering. When the multiple rotary support arms 30 are horizontally rotated inward, the multiple rotary support arms 30 are rotated and folded for storage at the outer wall of the upper inlet cup. The position of the rotating and folded cup when stored on the outer wall of the upper inlet cup includes multiple rotating support arms 30 that are attached to the outer wall of the upper inlet cup or embedded and hidden within the outer wall of the upper inlet cup. The rotating support arms have an arc-shaped structure that matches the outer wall of the upper inlet cup 10 when folded and stored.

[0029] The lower filter screen 20 adopts an inverted frustum-shaped filter screen structure, or a cylindrical or barrel-shaped filter screen structure. When adopting an inverted frustum-shaped filter screen structure, the outer circumference of the top end of the lower filter screen is larger than the outer circumference of the bottom end of the lower filter screen. The top end of the lower filter screen is connected to the bottom end of the upper inlet cup. The lower filter screen 20 can be fixed to the bottom end of the upper inlet cup by injection molding, or it can be fixed to the bottom end of the upper inlet cup by other installation connection structures.

[0030] Multiple rotary support arms are arranged in a structure with three rotary support arms, 30 in total, evenly distributed vertically and connected to the outer wall of the upper inlet cup 10. That is, the three rotary support arms are arranged in a 120-degree ring at intervals and vertically connected to the outer wall of the upper inlet cup. Alternatively, multiple rotary support arms can be arranged in a structure with two to five rotary support arms, 30 in total, evenly distributed vertically and connected to the outer wall of the upper inlet cup.

[0031] Each rotary support arm 30 has a vertical through-hole 31. Each rotary support arm is rotatably connected to the outer wall of the upper inlet cup via its corresponding vertical through-hole for a vertical pin or vertical post. The vertical height of the vertical pin or vertical post is greater than the vertical height of the vertical through-hole. The outer wall of the upper inlet cup is provided with a positioning connection seat for positioning the vertical pin or vertical post. Each vertical through-hole 31 is vertically through-holeed in the rotary connecting post 32 of the rotary support arm 30.

[0032] The outer wall of the upper inlet cup body 10 is provided with an outwardly protruding upper connecting positioning ring seat 12 and a lower connecting fixing ring seat 40. The vertical distance between the upper connecting positioning ring seat 12 and the lower connecting fixing ring seat 40 is slightly larger than the vertical height of the multiple rotating support arms, so as to effectively ensure that the multiple rotating support arms can freely rotate horizontally to open or rotate horizontally to fold and store within the vertical distance between the upper connecting positioning ring seat 12 and the lower connecting fixing ring seat 40. The upper connecting positioning ring seat 12 is fixedly connected to the outer wall of the upper inlet cup body 10, and the lower connecting fixing ring seat 40 is movably connected and fixedly connected to the outer wall of the upper inlet cup body 10. The upper connecting positioning ring seat 12 has multiple vertically downward opening upper positioning connection holes 121 (see...). Figure 4 The lower connecting ring seat 40 has a lower positioning connecting hole 411 with a vertically upward opening, and an upper positioning connecting hole 121 (see...). Figure 4The number of holes in the upper positioning connection hole 411 corresponds to the number of rotating support arms 30 used; the multiple rotating support arms are vertically and rotatably connected to the outer wall of the upper inlet cup through the upper positioning connection hole, the lower positioning connection hole 411 and the vertical pin or vertical pin 33.

[0033] The lower connecting fixing ring seat 40 adopts a ring structure with a certain height. The ring structure with vertical height can provide sufficient safety height support and stability space for the lower positioning connection holes 411 and vertical pins or vertical pins 33 when installing and connecting multiple rotating support arms. Multiple lower connecting fixing seats 41 and several inner wall clamps 43 are provided on the inner wall surface 42 of the ring structure. Each lower connecting fixing seat 41 has a lower positioning connection hole 411 with a vertical upward opening. The number of lower positioning connection holes corresponds to the number of rotating support arms used. Several inner wall clamps are used to engage with multiple outer wall clamps provided on the outer wall surface of the upper inlet cup, realizing the connection and fixation between the lower connecting fixing ring seat and the outer wall surface of the upper inlet cup. The outer peripheral dimension of the rotating connecting column 32 of each rotating support arm 30 matches the outer peripheral dimension of the lower connecting fixing seat 41 to ensure the stable, flexible and effective rotational connection of each rotating support arm 30.

[0034] Example 2:

[0035] Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 In the illustrated embodiment, a portable coffee maker with a filter assembly includes a grinder head body 50, a coffee liquid container 60, and the folding arm functional filter assembly described in Embodiment 1. When the grinder head body 50, the folding arm functional filter assembly, and the coffee liquid container 60 are assembled together, the folding arm functional filter assembly is connected to the bottom end of the grinder head body 50 and is located inside the coffee liquid container 60.

[0036] The coffee container 60 adopts the structure of a thermos cup; when the multiple rotating support arms 30 are opened by rotating them outward horizontally, the overall outer circumference of the multiple rotating support arms is larger than the circumference of the mouth of the coffee container 60; a detachable container lid 70 is installed and connected to the bottom of the coffee container, and a flip-top handle 71 and a flip-top snap-fit ​​sealing ring 72 are installed and connected to the detachable container lid 70. The detachable container lid 70 can be installed on the bottom of the coffee liquid container 60 of the insulated cup container structure under normal circumstances, without affecting the normal preparation and brewing of coffee liquid in the portable coffee maker. The detachable container lid 70 can also be removed and installed at the mouth of the coffee liquid container 60 of the insulated cup container structure for delayed heat preservation, protection and dust prevention. In the field, in the event of a power outage, or when you want to brew coffee powder or other beverages or tea for instant coffee brewing, multiple rotating support arms 30 can be opened outwards and placed at the mouth of the coffee liquid container 60, glass, travel pot, mug and other brewing containers for instant suspended brewing and filtering of coffee.

[0037] The bottom of the grinder head body 50 is fitted with a bottom fixing ring 53. An annular groove 531 is located on the outer circumference of the bottom fixing ring, and an O-ring 54 is installed and connected to the annular groove 531. The inner wall of the top of the upper inlet cup in the folding support arm filter assembly is sealed to the bottom fixing ring 53 at the bottom of the grinder head body via the O-ring 54. The grinder head body 50 includes components such as a decorative ring 51, a bean hopper shell 52, and a bottom fixing ring 53. The names of other grinder body components that fulfill the grinder's functionality are not listed in detail here.

[0038] In normal use, the folding arm filter assembly is installed and fixed to the bottom of the grinder head body 50. When preparing coffee using the electric grinder and brewing coffee machine, the coffee liquid container 60 (which is a thermos container) can be installed and fixed to the outer periphery of the bottom of the grinder head body 50. The multiple rotating support arms in the folding arm filter assembly are folded inwards and stored on the outer wall of the upper cup. At this time, the entire folding arm filter assembly is inside the cavity of the coffee liquid container 60. Thus, the coffee prepared by the electric grinder and brewing coffee machine can be... The coffee first passes through the filter of the folding arm functional filter assembly before entering the coffee liquid container 60, resulting in a smoother, residue-free coffee liquid. For immediate coffee brewing needs, such as in the field, during power outages, or when you want to brew coffee powder or other beverages, the folding arm functional filter assembly can be removed from the bottom of the grinder head 50. Then, the multiple rotating support arms 30 within the folding arm functional filter assembly can be opened outwards, and the support frame formed by the outwardly opened rotating support arms 30 can be placed on the mouth of the insulated coffee liquid container 60 (see...). Figure 6This allows for quick and easy brewing of coffee or other teas. After brewing the coffee or tea, the detachable lid attached to the bottom of the coffee container can be removed and replaced with the detachable lid 70 on the insulated coffee container to extend the heat retention of the brewed coffee or tea. Furthermore, the adjustable span of the multiple rotating support arms 30 in the folding support arm filter assembly allows for the use of various cup-shaped containers such as glass cups and travel jugs with different circumferences for instant brewing of coffee or other teas.

[0039] This utility model is not limited to the specific embodiments described above, and may also have other structural embodiments, such as designing the number of rotary support arms to be more than 5, all of which are within the protection scope of this utility model.

[0040] In the description of the positional relationship in this utility model, terms such as "inner", "outer", "upper", "lower", "left", "right", "top", and "bottom" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] The above content and structure describe the basic principles, main features, and advantages of this utility model, which should be understood by those skilled in the art. The examples and descriptions above are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A screen assembly, characterized by: The device includes a filter body and multiple rotating support arms. The filter body consists of an upper inlet cup and a lower filter. The top of the lower filter is connected to the bottom of the upper inlet cup. Each rotating support arm is rotatably connected to the outer wall of the upper inlet cup. When the multiple rotating support arms are opened horizontally outward, their overall outer circumference is larger than that of the upper inlet cup, and they are used as supports for brewing and filtering. When the multiple rotating support arms are folded horizontally inward, they are folded and stored on the outer wall of the upper inlet cup.

2. The screen assembly of claim 1, wherein: The lower filter screen adopts an inverted frustum-shaped filter screen structure, a cylindrical or barrel-shaped filter screen structure. When the inverted frustum-shaped filter screen structure is adopted, the outer circumference of the top end of the lower filter screen is larger than the outer circumference of the bottom end of the lower filter screen. The top end of the lower filter screen is connected to the bottom end of the upper inlet cup.

3. The screen assembly of claim 1, wherein: The multiple rotary support arms are arranged in a structure of 2 to 5 rotary support arms, which are evenly distributed vertically and connected to the outer wall of the upper inlet cup.

4. The screen assembly of claim 1, wherein: The multiple rotating support arms adopt a structure of 3 rotating support arms, which are evenly distributed vertically and connected to the outer wall of the upper inlet cup.

5. The screen assembly of claim 1 or 3 or 4, wherein: Each of the multiple rotary support arms is provided with a vertical through pin hole. The multiple rotary support arms are used to rotately connect with the outer wall of the upper inlet cup through their corresponding vertical through pin holes, with the vertical height of the vertical pin or vertical pin being greater than the vertical height of the vertical through pin hole. The outer wall of the upper inlet cup is provided with a positioning connection seat for positioning and connecting the vertical pin or vertical pin.

6. The screen assembly of claim 1 or 3 or 4, wherein: The outer wall of the upper inlet cup is provided with an outwardly protruding upper connecting positioning ring seat and a lower connecting fixing ring seat. The vertical distance between the upper connecting positioning ring seat and the lower connecting fixing ring seat is slightly larger than the vertical height of the multiple rotating support arms. The upper connecting positioning ring seat is fixedly connected to the outer wall of the upper inlet cup, and the lower connecting fixing ring seat is movably connected and fixedly connected to the outer wall of the upper inlet cup. The upper connecting positioning ring seat is provided with multiple vertically downward opening upper positioning connection holes, and the lower connecting fixing ring seat is provided with vertically upward opening lower positioning connection holes. The number of upper and lower positioning connection holes corresponds to the number of rotating support arms used. The multiple rotating support arms are vertically and rotatably connected to the outer wall of the upper inlet cup through the upper positioning connection holes, the lower positioning connection holes, and vertical pins or vertical pin columns.

7. The screen assembly of claim 6, wherein: The lower connecting fixing ring seat adopts a ring structure with a certain height. Multiple lower connecting fixing seats and several inner wall clamps are provided on the inner wall surface of the ring structure. Each lower connecting fixing seat has a lower positioning connecting hole with a vertical upward opening. The number of lower positioning connecting holes corresponds to the number of rotating support arms used. Several inner wall clamps are used to engage with multiple outer wall clamps provided on the outer wall surface of the upper inlet cup, so as to realize the connection and fixation of the lower connecting fixing ring seat and the outer wall surface of the upper inlet cup together.

8. A portable coffee maker with a filter screen assembly for grinding and brewing coffee, comprising a grinder head body, characterized in that: It also includes a coffee liquid container and a filter assembly as described in any one of claims 1 to 7. When the grinder head body, the filter assembly and the coffee liquid container are assembled together, the filter assembly with the folding support arm function is connected to the bottom end of the grinder head body and is located inside the coffee liquid container.

9. The portable coffee maker with a filter screen assembly according to claim 8, characterized in that: The coffee container adopts the structure of a thermos cup; when the multiple rotating support arms are opened by rotating them horizontally outward, the overall outer circumference of the multiple rotating support arms is larger than the circumference of the mouth of the coffee container; a detachable container lid is connected to the bottom of the coffee container.

10. The portable coffee maker with a filter screen assembly according to claim 8, characterized in that: The main body of the coffee grinder head is provided with a bottom fixing ring at the bottom end. The outer circumferential surface of the bottom fixing ring is provided with an annular groove. An O-ring is provided on the annular groove. The inner ring wall of the top of the upper inlet cup in the folding support arm functional filter assembly is sealed and connected to the bottom fixing ring at the bottom end of the main body of the coffee grinder head through the O-ring.

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