Constant force impact coffee tamper

Abstract

This utility model discloses a constant-force impact coffee tamper, including a handle, an impact hammer, a guide tube, a connecting tube, and a base. A pressure spring is provided between the handle and the impact hammer and is threadedly connected to the guide tube. The impact hammer is pressed tightly within the guide tube by the pressure spring. A return spring for the impact hammer is provided between the guide tube and the base, allowing the guide tube to be repositioned and movable within the connecting tube. The connecting tube is threadedly fixed to the base. The impact hammer has a circular arc protrusion at its bottom center, and a central groove matching the shape of the circular arc protrusion is provided at the center of the base. This utility model achieves automatic leveling and pressure control through a spring mechanism, solving the problems of tilting and unstable force when tamping for beginners. It achieves uniform tamping thickness and consistent force, making it suitable for beginners or commercial applications (such as standardized operation by different staff in chain stores).

Description

Technical Field

[0001] This utility model relates to the field of tamper technology, specifically to a constant force impact coffee tamper hammer. Background Technology

[0002] In the coffee-making process, the tamping step directly affects the taste and extraction quality of the coffee, with the main purpose of preventing the channeling effect. The channeling effect in coffee arises from uneven coffee grounds density. Water tends to choose the path of least resistance and concentrate its flow. When coffee grounds are not evenly distributed in the portafilter, numerous "channels" form between the coffee particles. These channels cause water to concentrate its extraction during the extraction process. This results in hot water not being able to fully extract every single coffee particle from the puck, ultimately leading to severe over-extraction of the coffee particles within the channels and severe under-extraction of the coffee particles outside the channels. The resulting coffee tastes sharp, acidic, and bitter, making it extremely unpalatable.

[0003] A tamper or coffee tamper is one of the most commonly used tools in espresso making. Its main purpose is to evenly compact the ground coffee, ensuring uniform spacing between the coffee particles to prevent them from absorbing water and expanding, which could lead to an unbalanced extraction process and ensure its stability. It also flattens the coffee grounds in the portafilter, creating a level surface that allows the coffee to withstand the immense pressure generated by the espresso machine during extraction, preventing the grounds from being scattered and ensuring even extraction. Finally, it allows hot water to fully penetrate and flow through the coffee puck, helping to extract flavor compounds and oils, thus enhancing the coffee's taste and quality.

[0004] Traditional tampers are generally operated manually, relying on the barista's skills to compact the coffee grounds and form a flat puck. Due to the high skill barrier, it requires long-term practice to control the force and levelness, and it is easy for the tamper to tilt or be uneven due to unstable hand position. In contrast, balanced tampers can achieve automatic leveling through anti-pinch rings and spring mechanisms, but the tamping force still requires experience and practice. Summary of the Invention

[0005] The purpose of this invention is to address the deficiencies and shortcomings of existing technologies and the aforementioned background technologies by providing a constant force impact coffee tamping hammer with a scientifically sound structure, uniform tamping thickness, consistent impact force, and suitability for beginners or commercial applications.

[0006] To achieve the above objectives and solve the above problems, the technical solution adopted by this utility model is: a constant force impact coffee tamper, including a handle, an impact hammer, a guide tube, a connecting tube, and a base. A pressure spring is provided between the handle and the impact hammer and is threadedly connected to the guide tube. The impact hammer is pressed tightly inside the guide tube by the pressure spring. An impact hammer return spring is provided between the guide tube and the base, so that the guide tube is restricted to the connecting tube and can be moved up and down to return to its original position. The connecting tube is fixedly connected to the base by threads. The impact hammer has an arc-shaped protrusion at the center of its bottom, and the base has a central groove at the center of its interior that matches the shape of the arc-shaped protrusion.

[0007] The working principle of this invention is as follows: The tamping hammer of this invention compresses the pressure spring and the impact hammer return spring to a certain distance by pressing down the handle, generating constant pressure (usually 30 pounds, about 13.61 kg). At the same time, the pressure spring causes the impact hammer installed in the guide tube to be limited and pressed down vertically. When the arc protrusion at the center of the bottom of the impact hammer is pressed down to the bottom of the base, it will automatically calibrate and quickly slide into the central groove of the base and hit the bottom of the base, making a crisp "click" sound, indicating that the tamping hammer has been successfully triggered. This ensures constant tamping force, achieves vertical and uniform tamping, greatly improves the coffee extraction quality, and reduces the difficulty of operation.

[0008] The working process of this utility model is as follows: First, the ground coffee powder is evenly distributed in the coffee bowl. Then, the tamper is placed vertically on the coffee bowl. Pressing down the handle causes the pressure spring to contract, which in turn moves the impact hammer downward. At the same time, the guide tube moves downward and the impact hammer return spring contracts. After applying stable pressure to the handle for 1-2 seconds, the arc-shaped protrusion at the bottom of the impact hammer will automatically align itself and slide into the central groove in the base, striking the bottom of the base. A crisp "click" sound is heard, indicating that the tamper has been successfully triggered. Finally, the handle is released, and the restoring force of the pressure spring and the impact hammer return spring causes the tamper to return to its original position.

[0009] This invention achieves automatic leveling and pressure control through a spring mechanism, solving the problems of tilting and unstable pressure when rubbing powder by beginners. It ensures uniform powder thickness and consistent pressure, making it suitable for beginners or commercial applications (such as standardized operation by different staff in chain stores).

[0010] Furthermore, the constant force impact coffee tamper also includes a tamper cover, which is provided with a tamper cover return spring to restrict it outside the connecting tube and allow it to move up and down in a reset manner.

[0011] With the above structure, the powder pressing cover return spring of this utility model can ensure that the powder pressing cover is horizontal. The edge of the powder pressing cover is larger than the powder bowl, which can prevent the powder pressing from being biased. After the filling is completed, the powder pressing cover return spring resets the powder pressing cover through the rebound force.

[0012] Furthermore, the constant force impact coffee tamper also includes a decorative tube, which is sleeved on the outside of the connecting tube and the tamper cap return spring and is threadedly connected to the tamper cap.

[0013] With the above structure, the decorative tube of this utility model not only makes the whole thing more beautiful, but also prevents the fine powder brought out by the powder pressing hammer when it rebounds upward from entering the reset spring of the powder pressing cover, so as not to affect the powder pressing effect.

[0014] Furthermore, the impact hammer is a cylinder with a "T" shaped cross-section, and its top is provided with a cylindrical boss that matches the size of the pressure spring. A positioning post is provided below the cylindrical boss; a positioning seat that cooperates with the positioning post is provided inside the guide tube.

[0015] With the above structure, the impact hammer of this invention, through positioning and cooperation with the guide tube, prevents the impact hammer from tilting, ensures that the tamping hammer tamps the coffee powder vertically and evenly, keeps the density of the coffee cake uniform and stable, and lays the foundation for subsequent stable coffee extraction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is an exploded three-dimensional schematic diagram of a specific embodiment of the present utility model; Figure 2 This is a three-dimensional schematic diagram of the impact hammer in a specific embodiment of this utility model.

[0018] Explanation of reference numerals in the attached figures: 1. Handle; 2. Compression spring; 3. Impact hammer (31. Adjusting thread, 32. Positioning teeth, 33. Anti-slip texture); 4. Guide tube; 5. Decorative tubes; 6. Connecting pipe; 7. Powder pressing cover return spring; 8. Powder tamping lid; 9. Impact hammer return spring; 10. Base. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] See Figure 1, Figure 2 As shown, the technical solution adopted in this specific embodiment is: A constant force impact coffee tamper includes a handle 1, an impact hammer 3, a guide tube 4, a connecting tube 6, and a base 10. A pressure spring 2 is provided between the handle 1 and the impact hammer 3 and is threadedly connected to the guide tube 4. The impact hammer 3 is pressed tightly inside the guide tube 4 by the pressure spring 2. An impact hammer return spring 9 is provided between the guide tube 4 and the base 10, which restricts the guide tube 4 within the connecting tube 6 and allows it to move up and down to return to its original position. The connecting tube 6 is fixedly connected to the base 10 by threads. The impact hammer 3 has an arc-shaped protrusion 31 at the center of its bottom, and the base 10 has a central groove at the center of its interior that matches the shape of the arc-shaped protrusion 31. In this specific embodiment, the tamping hammer 3 compresses the pressure spring 2 and the impact hammer return spring 9 to a certain distance by pressing down the handle 1, generating a constant pressure (typically 30 pounds, approximately 13.61 kg). Simultaneously, the pressure spring 2 causes the impact hammer 3, installed in the guide tube 4, to be limited and pressed vertically downward. When the arc-shaped protrusion 31 at the center of the bottom of the impact hammer 3 presses down to the bottom of the base 10, it automatically calibrates and quickly slides into the central groove of the base 10 and strikes the bottom of the base 10, producing a crisp "click" sound, indicating that the tamping hammer has been successfully triggered. This ensures constant tamping force, achieves vertical and uniform tamping, greatly improves coffee extraction quality, and reduces operational difficulty.

[0021] The workflow of this specific embodiment is as follows: First, the ground coffee powder is evenly distributed in the coffee bowl. Then, the tamper is placed vertically on the coffee bowl. Pressing down the handle 1 causes the pressure spring 2 to contract, which in turn moves the impact hammer 3 downward. At the same time, the guide tube 4 moves downward and the impact hammer return spring 9 contracts. After applying stable pressure to the handle 1 for 1-2 seconds, the arc-shaped protrusion 31 at the bottom of the impact hammer 3 will automatically calibrate and quickly slide into the central groove in the base 10 and strike the bottom of the base 10. A crisp "click" sound is heard, indicating that the tamper has been successfully triggered. Finally, the handle 1 is released. At this time, the restoring force of the pressure spring 2 and the impact hammer return spring 9 causes the tamper to return to its original position.

[0022] The powder pressing hammer described in this specific embodiment achieves automatic leveling and constant pressure through a spring mechanism, solving the problems of tilting and unstable force when pressing powder by beginners. It achieves uniform powder thickness and consistent force, making it suitable for beginners or commercial use (such as standardized operation by different staff in chain stores).

[0023] In this specific embodiment, the constant force impact coffee tamper also includes a tamper cover 8. The tamper cover 8 is equipped with a tamper cover return spring 7, which restricts it outside the connecting pipe 6 and allows it to move up and down for resetting. The tamper cover return spring 7 in this specific embodiment ensures that the tamper cover 8 is level. The edge of the tamper cover 8 is larger than the coffee bowl, which can prevent uneven pressing. After pressing is completed, the tamper cover return spring 7 resets the tamper cover 8 through its rebound force.

[0024] In this specific embodiment, the constant force impact coffee tamper also includes a decorative tube 5. The decorative tube 5 is sleeved on the outside of the connecting tube 6 and the tamper cover return spring 7, and is threadedly connected to the tamper cover 8. The decorative tube 5 in this specific embodiment not only makes the overall appearance more aesthetically pleasing, but also prevents fine powder brought out by the tamper when it rebounds upward from entering the tamper cover return spring 7, so as not to affect the tampering effect.

[0025] In this specific embodiment, the impact hammer 3 is a cylinder with a "T"-shaped cross-section. Its top is provided with a cylindrical boss 32 that matches the size of the pressure spring 2, and a positioning post 33 is provided below the cylindrical boss 32. A positioning seat that mates with the positioning post 33 is provided inside the guide tube 4. In this specific embodiment, the impact hammer 3, through its positioning engagement with the guide tube 4, prevents tilting, ensuring that the tamping hammer tamps the coffee powder vertically and evenly, maintaining a uniform and stable density of the coffee cake, thus laying the foundation for stable coffee extraction.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention. Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This method of description is merely for clarity, and those skilled in the art should consider the specification as a whole. The technical solutions in the various embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A constant force impact coffee tamper, characterized in that: Includes a handle (1), an impact hammer (3), a guide tube (4), a connecting tube (6), and a base (10). A pressure spring (2) is provided between the handle (1) and the impact hammer (3) and is threadedly connected to the guide tube (4). The impact hammer (3) is pressed tightly inside the guide tube (4) by the pressure spring (2). An impact hammer reset spring (9) is provided between the guide tube (4) and the base (10) to restrict the guide tube (4) to be repositioned and movable up and down within the connecting tube (6). The connecting tube (6) is fixedly connected to the base (10) by threads. The impact hammer (3) has an arc protrusion (31) at the center of its bottom. The base (10) has a central groove at the center that matches the shape of the arc protrusion (31).

2. The constant force impact coffee tamper according to claim 1, characterized in that: It also includes a powder pressing cover (8), which is provided with a powder pressing cover reset spring (7) to restrict it outside the connecting pipe (6) and allow it to be reset and move up and down.

3. The constant force impact coffee tamper according to claim 2, characterized in that: It also includes a decorative tube (5), which is sleeved on the outside of the connecting tube (6) and the powder pressing cover reset spring (7) and is threadedly connected to the powder pressing cover (8).

4. The constant force impact coffee tamper according to claim 1, characterized in that: The impact hammer (3) is a cylinder with a "T" shaped cross section. Its top is provided with a cylindrical boss (32) that matches the size of the pressure spring (2). A positioning post (33) is provided below the cylindrical boss (32). A positioning seat that cooperates with the positioning post (33) is provided inside the guide tube (4).

Images