Manual coffee powder stirrer

Abstract

The utility model provides a manual coffee powder stirrer, and relates to the technical field of coffee making tools. The powder stirrer comprises: a support body provided with an open accommodating space; the stirring structure is rotatably arranged in the open accommodating space; the pressing structure comprises a transmission rod, a pressing rod and a reset spring, one end of the transmission rod is connected with the stirring structure, the other end of the transmission rod penetrates through the supporting body and extends to the outer space of the supporting body, the pressing rod is arranged at the end, away from the stirring structure, of the transmission rod and is in telescopic fit with the transmission rod, and a rotation driving structure is arranged between the transmission rod and the pressing rod; the reset spring is used for resetting the transmission rod and the pressing rod after contraction; the positioning adjusting structure comprises a first limiting part and a second limiting part, and the first limiting part and the second limiting part are both arranged on the transmission rod; and the first limiting part is in magnetic attraction fit with the supporting body. The problem that the height of a stirring needle of a traditional powder stirrer cannot be adjusted is solved, and depth adjustment under different powder amounts and extraction requirements is met.

Description

Technical Field

[0001] This utility model relates to the field of coffee making tools, and more specifically, to a manual coffee grinder. Background Technology

[0002] As people's living standards continue to improve, drinking coffee has become a lifestyle enjoyment. To make an espresso, first, put coffee beans into a coffee grinder, adjust the grind to your preference, and start the machine to grind a suitable amount of fine coffee powder. Next, place the coffee caddy under the grinder's outlet to collect the ground coffee. Then, gently pour the coffee powder from the caddy into the coffee bowl of the espresso machine, distributing it as evenly as possible. Next, use the tamper to compact the coffee powder in the bowl into a firm puck. After installing the puck, start the espresso machine, allowing hot, high-pressure water to extract the coffee powder through the puck. After a short time, a rich, full-bodied espresso with abundant crema is ready.

[0003] In the process of making espresso, after the coffee grounds are poured into the portafilter from the hopper, they need to be stirred using a stirrer. The stirrer primarily uses the movement of needles within the ground coffee to break up clumps, ensuring even distribution of the coffee grounds within the portafilter, thereby improving extraction quality. Stirrers are mainly divided into electric and manual types. Compared to electric stirrers, manual stirrers have the advantage of not requiring a motor or other driving mechanism, resulting in a simpler overall structure and lower manufacturing costs.

[0004] Currently, existing manual coffee maker technology mainly consists of a support structure, a stirring structure, and a pressing structure. The stirring structure is rotatably mounted on the support structure, and the pressing structure drives the stirring structure to rotate. In actual operation, the coffee bowl is attached to the support structure to fit the stirring structure, and the pressing structure drives the stirring structure to rotate, thus stirring the coffee grounds in the coffee bowl. However, this type of manual coffee maker has shortcomings. The height of the coffee needle in the coffee bowl cannot be adjusted, making it difficult to flexibly adjust to different coffee amounts and extraction requirements, thus limiting its applicability and practicality.

[0005] For example, the Chinese invention patent with application number CN202411601451.0 and patent name "A Coffee Stirrer" also has the above-mentioned problems. Utility Model Content

[0006] The purpose of this invention is to provide a manual coffee grinder, which aims to solve the technical problems mentioned in the background art.

[0007] The embodiments of this utility model are implemented as follows:

[0008] This application provides a manual coffee grinder, comprising: a support body with an open receiving space, the opening of which is used to connect to a coffee bowl; a stirring structure rotatably disposed within the open receiving space for stirring with the coffee bowl; and a pressing structure including a drive rod, a pressing rod, and a return spring. One end of the drive rod is connected to the stirring structure, and the other end passes through the support body and extends to the external space of the support body. The drive rod is rotatable and / or sliding relative to the support body. The pressing rod is disposed at the end of the drive rod away from the stirring structure and is in telescopic cooperation with the drive rod. A rotation drive structure is provided between the drive rod and the pressing rod. The transmission rod and the pressing rod are used to drive their relative rotation during telescopic engagement. The return spring connects the transmission rod and the pressing rod and is used to reset the transmission rod and the pressing rod after retraction. A positioning adjustment structure is also included, comprising a first limiting part and a second limiting part. Both the first and second limiting parts are disposed on the transmission rod and are located on the inner and outer sides of the open accommodating space, respectively, to limit the sliding range of the transmission rod. The second limiting part can slide axially on the outer wall of the transmission rod and is provided with a positioning structure for locking after sliding. The first limiting part magnetically engages with the support body.

[0009] Furthermore, based on the aforementioned scheme, the end face of the transmission rod away from the stirring structure is provided with a guide groove in the axial direction, the pressing rod is telescopically engaged with the guide groove, and the end face of the pressing rod facing the guide groove is provided with an mounting groove in the axial direction.

[0010] The rotary drive structure includes a threaded shaft, which is axially disposed in the guide groove. One end of the threaded shaft facing the pressing rod is fitted into the mounting groove, and the mounting groove is provided with a threaded structure adapted to the threaded shaft.

[0011] Furthermore, based on the aforementioned scheme, the reset spring is disposed inside the mounting groove, with one end of the reset spring connected to the pressing rod and the other end connected to the threaded shaft.

[0012] Furthermore, based on the aforementioned scheme, the second limiting part is a ring-shaped component, and the second limiting part is sleeved on the outer side wall of the transmission rod;

[0013] The positioning structure includes an external thread on the outer wall of the transmission rod and an internal thread on the inner wall of the second limiting part, which is adapted to the external thread.

[0014] Furthermore, based on the aforementioned scheme, the support body is provided with a magnet, and the first limiting part is made of a magnetic material for magnetic attraction with the magnet.

[0015] Furthermore, based on the aforementioned scheme, a silicone pad is provided on the side of the first limiting part facing the magnet.

[0016] Furthermore, based on the aforementioned scheme, the stirring structure includes a connecting frame and a stirring needle. The connecting frame is movably disposed in the open accommodating space and connected to the transmission rod. The stirring needle is disposed on the side wall of the connecting frame away from the transmission rod.

[0017] The number of the aforementioned powder-stirring needles is multiple.

[0018] Furthermore, based on the aforementioned scheme, the opening of the open-type accommodating space is provided with a ring-shaped interface for fitting and connecting with the rim of the aforementioned bowl.

[0019] Compared with the prior art, the embodiments of this utility model have at least the following advantages or beneficial effects:

[0020] The manual coffee grinder disclosed in this application operates as follows: During use, the coffee bowl is aligned with the opening of the open space of the support body. The pressing lever is manually pressed, and the pressure is transmitted to the transmission rod. This causes the first limiting part on the transmission rod to overcome the magnetic force between itself and the support body, allowing for detachment. The transmission rod then slides downwards until the second limiting part on the transmission rod abuts against the support body. At this point, the stirring needle of the stirring mechanism descends to a preset depth within the coffee bowl. During continuous pressing, the pressing lever and the transmission rod engage in a telescopic cooperation, and their rotational drive structure causes the transmission rod to rotate synchronously, thereby driving the stirring mechanism to agitate the coffee powder. Simultaneously, by axially sliding the second limiting part on the outer wall of the transmission rod and locking it using its positioning structure, the distance between the second and first limiting parts can be flexibly adjusted, allowing for precise adjustment of the height of the stirring needle within the coffee bowl. The advantages of this technical solution are as follows: through the coordinated design of the detachable first limiting part, the sliding and locking second limiting part, and the rotary drive structure, it not only solves the problem of the non-adjustable height of the stirring needle in traditional powder stirrers, meeting the depth adjustment under different powder amounts and extraction requirements, but also simplifies the operation process and lowers the threshold for use by using a press-to-extension driving stirring method. In addition, the reset spring ensures automatic reset after pressing, improving the continuity of operation and user experience, and significantly expanding the applicable scenarios and practicality of the powder stirrer. Attached Figure Description

[0021] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on 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 an isometric view of a manual coffee grinder according to an embodiment of the present invention;

[0023] Figure 2 This is a front view of a manual coffee grinder according to an embodiment of the present invention;

[0024] Figure 3 This is a cross-sectional view of a manual coffee grinder according to an embodiment of the present invention;

[0025] Figure 4 for Figure 3 A partial view of area A in the middle;

[0026] Figure 5 This is an isometric view of the stirring structure in an embodiment of this utility model.

[0027] Icons: 1-Pressing rod, 2-Transmission rod, 3-Support body, 4-First limiting part, 5-Stirring structure, 501-Connecting frame, 502-Stirring needle, 6-Second limiting part, 7-Guide groove, 8-Threaded shaft, 9-Mounting groove, 10-Annular coupling interface, 11-Magnet, 12-Silicone pad, 13-Open receiving space, 14-Reset spring. Detailed Implementation

[0028] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0029] Example

[0030] Please refer to Figures 1-5This application provides a manual coffee mixer, comprising: a support body 3 with an open receiving space 13, the opening of which is used to connect to a coffee bowl; a stirring structure 5 rotatably disposed within the open receiving space 13 for stirring with the coffee bowl; and a pressing structure including a transmission rod 2, a pressing rod 1, and a return spring 14. One end of the transmission rod 2 is connected to the stirring structure 5, and the other end passes through the support body 3 and extends to the external space of the support body 3. The transmission rod 2 is rotatable and / or slidable relative to the support body 3. The pressing rod 1 is disposed at the end of the transmission rod 2 away from the stirring structure 5 and is in telescopic cooperation with the transmission rod 2. A rotation drive structure is provided between the transmission rod 2 and the pressing rod 1. The structure includes a transmission rod 2 and a pressing rod 1, which drive relative rotation of the two during their telescopic engagement. The return spring 14 connects the transmission rod 2 and the pressing rod 1 and is used to reset the transmission rod 2 and the pressing rod 1 after retraction. A positioning adjustment structure is also included, comprising a first limiting part 4 and a second limiting part 6. Both the first limiting part 4 and the second limiting part 6 are disposed on the transmission rod 2 and are located on the inner and outer sides of the open accommodating space 13, respectively, to limit the sliding range of the transmission rod 2. The second limiting part 6 can slide axially along the outer wall of the transmission rod 2 and is provided with a positioning structure for locking after sliding. The first limiting part 4 magnetically engages with the support body 3.

[0031] The manual coffee grinder disclosed in this application operates as follows: During use, the coffee bowl is aligned with the opening of the open receiving space 13 of the support body 3. The pressing lever 1 is manually pressed, transmitting pressure to the transmission rod 2. This causes the first limiting part 4 on the transmission rod 2 to overcome the magnetic force between itself and the support body 3, allowing for detachment. The transmission rod 2 then slides downwards until the second limiting part 6 on the transmission rod 2 contacts the support body 3. At this point, the stirring needle of the stirring structure 5 descends to a preset depth within the coffee bowl. During continuous pressing, the pressing lever 1 and the transmission rod 2 engage in a telescopic cooperation. The rotational drive structure between them causes the transmission rod 2 to rotate synchronously, thereby driving the stirring structure 5 to stir the coffee powder. Simultaneously, by axially sliding the second limiting part 6 along the outer wall of the transmission rod 2 and locking it using its positioning structure, the distance between the second limiting part 6 and the first limiting part 4 can be flexibly adjusted, achieving precise adjustment of the height of the stirring needle within the coffee bowl. The advantages of this technical solution are as follows: through the coordinated design of the detachable first limiting part 4, the slidable and lockable second limiting part 6, and the rotary drive structure, it not only solves the problem of the non-adjustable height of the stirring needle in traditional powder stirrers and meets the depth adjustment under different powder amounts and extraction requirements, but also simplifies the operation process and lowers the threshold of use by using the press-to-extension driving stirring method. In addition, the reset spring 14 ensures automatic reset after pressing, improving the continuity of operation and user experience, and significantly expanding the applicable scenarios and practicality of the powder stirrer.

[0032] In a preferred embodiment, the transmission rod 2 is provided with a guide groove 7 on the end face away from the stirring structure 5, the pressing rod 1 is in telescopic cooperation with the guide groove 7, and the pressing rod 1 is provided with an installation groove 9 on the end face facing the guide groove 7.

[0033] The rotary drive structure includes a threaded shaft 8, which is axially disposed in the guide groove 7. One end of the threaded shaft 8 facing the pressing rod 1 is fitted into the mounting groove 9, and the mounting groove 9 is provided with a threaded structure that is compatible with the threaded shaft 8.

[0034] In the above embodiment, when the pressing rod 1 is manually pressed, the pressing rod 1 moves axially within the guide groove 7. Due to the meshing relationship between the threaded shaft 8 and the threaded structure within the mounting groove 9, the linear motion of the pressing rod 1 is converted into rotational motion around the threaded shaft 8, thereby driving the transmission rod 2 to rotate, realizing the stirring operation of the stirring structure 5 on the coffee powder. Its advantages are that by utilizing the threaded transmission principle, the telescopic motion of the pressing rod 1 is efficiently converted into the rotational motion of the transmission rod 2, resulting in a simple and compact structure without the need for additional complex transmission components; the self-locking characteristic of the thread ensures a stable and reliable transmission process, preventing slippage or jamming during rotation.

[0035] In a preferred embodiment, the reset spring 14 is disposed inside the mounting groove 9, with one end of the reset spring 14 connected to the pressing rod 1 and the other end connected to the threaded shaft 8.

[0036] In the above embodiment, this layout makes full use of the internal space of the mounting slot 9, integrating the return spring 14 with the rotary drive structure into a single integrated design. This effectively reduces the overall space occupied by the structure, making the manual powder mixer more compact. During operation, the return spring 14 is compressed and stores elastic potential energy during the pressing of the pressing rod 1. When the external force is removed, the return spring 14 releases the elastic potential energy, providing a reverse reset driving force for the pressing rod 1 and the transmission rod 2. This ensures that both automatically return to their initial positions after contraction, facilitating the next powder mixing operation and improving the continuity of use. Simultaneously, the return spring 14 is effectively protected within the mounting slot 9, preventing damage from external impacts and friction during use and extending its service life.

[0037] In a preferred embodiment, the second limiting part 6 is an annular part, and the second limiting part 6 is sleeved on the outer side wall of the transmission rod 2.

[0038] The positioning structure includes an external thread on the outer side wall of the transmission rod 2 and an internal thread on the inner side wall of the second limiting part 6, which is adapted to the external thread.

[0039] In the above embodiment, during use, by rotating the second limiting part 6, the meshing transmission of the internal and external threads causes the second limiting part 6 to move axially along the transmission rod 2, thereby adjusting the distance between it and the first limiting part 4, and thus adjusting the height of the stirring structure 5 in the powder bowl. When the target height is reached, rotation stops, and the self-locking characteristic of the threads fixes the second limiting part 6 in the corresponding position, thereby locking the height of the stirring structure 5. Its advantages are that the threaded transmission structure is simple and has high transmission accuracy, enabling stepless adjustment of the height of the stirring structure 5, meeting diverse application scenarios under different powder amounts and extraction requirements; the self-locking function of the threads ensures that the second limiting part 6 remains stable during operation, preventing the stirring structure 5 from shifting in height due to external forces or vibrations, ensuring the reliability of the powder stirring operation.

[0040] In a preferred embodiment, the support 3 is provided with a magnet 11, and the first limiting part 4 is made of a magnetic material for magnetic attraction with the magnet 11.

[0041] In the above embodiments, the first limiting part 4 and the support body 3 are quickly connected and separated by magnetic force, which is convenient and efficient. When the transmission rod 2 is pressed, the magnetic force provides initial stable support, preventing the stirring structure 5 from shaking randomly and ensuring that the position is fixed before stirring. When the pressing force is applied to overcome the magnetic force, the transmission rod 2 can smoothly slide to adjust the height of the stirring structure 5 without complicated plugging or snapping operations. The magnetic connection has no mechanical wear, has a longer service life and lower maintenance requirements compared to traditional mechanical connection methods. At the same time, the magnetic connection has a certain degree of fault tolerance, allowing the transmission rod 2 to be finely adjusted within a small range, and no precise alignment is required during installation, reducing assembly difficulty and improving production efficiency.

[0042] Preferably, the first limiting part 4 is made of 420 stainless steel. Using 420 stainless steel as the material of the first limiting part 4 has the advantages of both magnetic properties, which allow it to magnetically attract the magnet 11, and high hardness and corrosion resistance, which can ensure connection stability and structural durability, adapt to the equipment's operating environment, and extend its service life.

[0043] Both the first limiting part 4 and the magnet 11 are annular, and their central axes coincide with the central axis of the transmission rod 2. The symmetrical structure of the annular magnet 11 enables the magnetic force to be evenly distributed along the axis of the transmission rod 2, ensuring that the transmission rod 2 is in a balanced force position at the initial position and avoiding eccentricity or tilting caused by uneven magnetic force, thus ensuring that the stirring structure 5 is in a stable initial state. During the process of pressing the transmission rod 2 to adjust the height of the stirring structure 5, the uniform magnetic force distribution makes the transmission rod 2 slide more smoothly, reduces jamming, and improves the operating feel.

[0044] In a preferred embodiment, a silicone pad 12 is provided on the side of the first limiting part 4 facing the magnet 11.

[0045] In the above embodiment, a silicone pad 12 is provided on the side of the first limiting part 4 facing the magnet 11. The elastic buffering effect of the silicone can reduce rigid collisions during magnetic connection, reduce noise and protect the contact surface.

[0046] In a preferred embodiment, the stirring structure 5 includes a connecting frame 501 and a stirring needle 502. The connecting frame 501 is movably disposed in the open receiving space 13 and connected to the transmission rod 2. The stirring needle 502 is disposed on the side wall of the connecting frame 501 away from the transmission rod 2.

[0047] Among them, there are multiple powder stirring needles 502.

[0048] In the above embodiment, the connecting frame 501 is movably disposed in the receiving space and connected to the transmission rod 2, which can ensure that the rotational power of the transmission rod 2 is effectively transmitted to the stirring needle 502 to achieve stable stirring action; the design of multiple stirring needles 502 can significantly increase the contact area with coffee powder, making the coffee powder more evenly stressed during the stirring process, speeding up the dispersal of coffee powder clumps, reducing the stirring blind zone, and ensuring that the coffee powder is more evenly distributed in the coffee bowl, thereby effectively improving the extraction quality.

[0049] As a preferred embodiment, the opening of the open accommodating space 13 is provided with an annular interface 10 for fitting and connecting with the rim of the bowl.

[0050] In the above embodiments, the precisely matched annular structure enables a stable connection between the coffee bowl and the container space, preventing the coffee bowl from shaking or shifting during stirring and ensuring smooth stirring operation. The annular interface 10 effectively limits the installation position of the coffee bowl, keeping the coffee bowl and the stirring structure 5 in a relatively fixed positional relationship, ensuring that the stirring needle 502 can accurately act on the coffee powder in the coffee bowl, improving the uniformity of stirring and the extraction effect.

[0051] Furthermore, unless otherwise explicitly specified or limited, the terms "installation" and "connection" in this application embodiment should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. The terms "upper," "lower," "left," "right," "inner," "outer," and "side," etc., are merely for reference to the direction in the accompanying drawings or the usual placement of the product during use. They are only for clearly describing this application and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limitations on this application. The terms "first," "second," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance; "multiple" refers to at least two. In this application embodiment, the limitations on relative positional relationships such as parallel, perpendicular, and aligned are all relative to the current technological level and are not absolutely strict limitations. Slight deviations are allowed; approximations of parallel, perpendicular, and aligned are all acceptable. For example, "A and B are parallel" means that A and B are parallel or approximately parallel, and the angle between A and B can be between 0 degrees and 10 degrees.

[0052] The above are only some embodiments and implementation methods of this application. The protection scope of this application is not limited thereto. In the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other. Any combination of features in different embodiments is also within the protection scope of this application. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the protection scope of this application.

Claims

1. A manual coffee grinder, characterized in that, include: The support body (3) is provided with an open receiving space (13), the opening of which is used to connect to a powder bowl. The stirring structure (5) is rotatably disposed in the open accommodating space (13) for stirring with the powder bowl; The pressing structure includes a transmission rod (2), a pressing rod (1), and a return spring (14). One end of the transmission rod (2) is connected to the stirring structure (5), and the other end passes through the support body (3) and extends to the external space of the support body (3). The transmission rod (2) can rotate and / or slide relative to the support body (3). The pressing rod (1) is located at the end of the transmission rod (2) away from the stirring structure (5) and is telescopically engaged with the transmission rod (2). A rotation drive structure is provided between the transmission rod (2) and the pressing rod (1) to drive the relative rotation of the two when the transmission rod (2) and the pressing rod (1) are telescopically engaged. The return spring (14) connects the transmission rod (2) and the pressing rod (1) and is used to reset the transmission rod (2) and the pressing rod (1) after they are retracted. as well as The positioning and adjustment structure includes a first limiting part (4) and a second limiting part (6). The first limiting part (4) and the second limiting part (6) are both provided on the transmission rod (2), and they are located on the inner and outer sides of the open accommodating space (13) respectively, for limiting the sliding range of the transmission rod (2). The second limiting part (6) can slide axially on the outer side wall of the transmission rod (2). The second limiting part (6) is provided with a positioning structure for locking after the second limiting part (6) slides. The first limiting part (4) is magnetically attracted to the support body (3).

2. A manual coffee grinder according to claim 1, characterized in that, The transmission rod (2) has a guide groove (7) axially arranged on the end face away from the stirring structure (5), the pressing rod (1) is telescopically engaged with the guide groove (7), and the pressing rod (1) has an installation groove (9) axially arranged on the end face facing the guide groove (7); The rotary drive structure includes a threaded shaft (8), which is axially disposed in the guide groove (7), and one end of the threaded shaft (8) facing the pressing rod (1) is fitted into the mounting groove (9), and the mounting groove (9) is provided with a threaded structure adapted to the threaded shaft (8).

3. A manual coffee grinder according to claim 2, characterized in that, The reset spring (14) is disposed inside the mounting groove (9), with one end of the reset spring (14) connected to the pressing rod (1) and the other end connected to the threaded shaft (8).

4. A manual coffee grinder according to claim 1, characterized in that, The second limiting part (6) is a ring-shaped part, and the second limiting part (6) is sleeved on the outer side wall of the transmission rod (2); The positioning structure includes an external thread on the outer side wall of the transmission rod (2) and an internal thread on the inner side wall of the second limiting part (6) for matching the external thread.

5. A manual coffee grinder according to claim 1, characterized in that, The support (3) is provided with a magnet (11), and the first limiting part (4) is made of magnetic material and is used to magnetically engage with the magnet (11).

6. A manual coffee grinder according to claim 5, characterized in that, A silicone pad (12) is provided on the side of the first limiting part (4) facing the magnet (11).

7. A manual coffee grinder according to claim 1, characterized in that, The stirring structure (5) includes a connecting frame (501) and a stirring needle (502). The connecting frame (501) is movably disposed in the open receiving space (13) and connected to the transmission rod (2). The stirring needle (502) is disposed on the side wall of the connecting frame (501) away from the transmission rod (2). The number of the powder stirring needles (502) is multiple.

8. A manual coffee grinder according to claim 7, characterized in that, The opening of the open accommodating space (13) is provided with a ring-shaped interface (10) for fitting and connecting with the rim of the bowl.

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