A portable coffee press with adjustable extraction pressure

Abstract

The utility model relates to coffee making utensil technical field, concretely relates to a portable coffee powder presser of adjustable extraction pressure, including fender and the storage groove of opening in fender bottom, fender top penetrates the through -hole of storage groove opening has, the inner hole wall of through -hole opens two center symmetry distribution's arc cavity, the storage groove groove bottom is equipped with the sealing base of screw thread installation, is provided with the powder press head in the storage groove, the top perpendicular fixedly connected with the lifting rod of passing through the through -hole of powder press head, the outer rod wall of lifting rod has engraved the pressure scale, the utility model discloses through the pressure scale and arc extrusion head's locking structure of lifting rod, the user can accurately control powder strength (such as 6Bar 9Bar 12Bar), adapts to different extraction demand, and the powder press head can be completely stored in the fender, and the knob is hiddenly arranged, and the overall volume is small and exquisite, is suitable for travel or outdoor use, and the pressure scale is directly marked on the lifting rod, and the user can complete the adjustment without extra tools, reduces the learning cost.

Description

Technical Field

[0001] This utility model relates to the field of coffee making equipment technology, specifically to a portable coffee tamper with adjustable extraction pressure. Background Technology

[0002] In the coffee-making process, tamping is a crucial step affecting the uniformity of extraction and flavor. Traditional tampers are mostly designed with a fixed pressure, requiring users to control the pressure solely by feel, leading to inconsistent extraction. This is especially true for espresso, where the standard pressure range is 8-10 bar. Insufficient pressure results in under-extraction (sour taste), while excessive pressure can cause over-extraction (bitter taste).

[0003] Currently, portable powder compactors on the market mainly have the following problems: Pressure is not adjustable: Most tampers use a fixed spring or are manually operated, which cannot adapt to different amounts of coffee powder, grind size and extraction method.

[0004] Low adjustment accuracy: Some adjustable powder presses rely on screws, making the adjustment process cumbersome and lacking intuitive pressure feedback.

[0005] Complex structure: Some products use hydraulic or electronic adjustment, which makes them large in size and expensive, and unsuitable for outdoor or travel use.

[0006] Therefore, there is an urgent need for an adjustable tamper that is simple in structure, precise in adjustment, and portable to meet the needs of professional baristas and enthusiasts. Utility Model Content

[0007] This invention aims to solve the problems of inaccurate pressure adjustment, complicated operation, and poor portability of existing coffee tampers, and provides a portable coffee tamper that achieves rapid pressure adjustment through a mechanical structure.

[0008] To achieve the above objectives, this utility model provides the following technical solution: This utility model provides a portable coffee tamper with adjustable extraction pressure, including a baffle plate and a storage groove at the bottom of the baffle plate. A through hole is provided at the top of the baffle plate through the storage groove. Two centrally symmetrical arc-shaped cavities are provided in the inner wall of the through hole. A tamping head is provided in the storage groove. A lifting rod passing through the through hole is vertically fixed to the top of the tamping head. Pressure scale is engraved on the outer wall of the lifting rod. Arc-shaped extrusion heads are slidably installed in both arc-shaped cavities, pressing against the outer wall of the lifting rod.

[0009] Furthermore, a sealing base is threadedly installed in the storage slot, and the top of the sealing base contacts the bottom of the powder pressing head.

[0010] Furthermore, a knob is fixedly installed at the bottom of the sealing base, and the knob is hidden inside the storage slot.

[0011] Furthermore, a stop block is fixedly installed on the top of the lifting rod, and a handle is fixedly installed on the top of the stop block.

[0012] Furthermore, two centrally symmetrically distributed storage seats are fixedly installed on the outer ring wall of the baffle. Each of the two storage seats has a storage cavity that communicates with two arc-shaped cavities. The two storage seats have threaded holes through the storage cavities on the opposite side.

[0013] Furthermore, screws are threaded into both of the threaded holes, and the ends of both screws extend into the receiving cavity. A rotating plate is vertically fixed thereon, and the two rotating plates are respectively embedded and rotatably installed in the corresponding arc-shaped extrusion head.

[0014] The technical solution provided by this utility model has the following advantages compared with the known prior art: Precise pressure regulation: With the pressure scale of the lifting rod and the locking structure of the arc-shaped extrusion head, users can precisely control the tamping force (such as 6 Bar / 9 Bar / 12 Bar) to adapt to different extraction needs.

[0015] Portable all-in-one design: The powder applicator can be completely stored inside the plate, and the knob is hidden. The overall size is compact, making it suitable for travel or outdoor use.

[0016] The operation is intuitive and simple: The pressure scale is directly marked on the lifting rod, allowing users to adjust it without additional tools, thus reducing the learning curve. Attached Figure Description

[0017] 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.

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the concealed design structure of the sealing base of this utility model; Figure 3 This is a schematic diagram of the installation structure of the powder pressing head and lifting rod of this utility model; Figure 4This is a schematic diagram of the installation structure of the baffle and storage base of this utility model; Figure 5 This is a schematic diagram of the installation structure of the arc-shaped extrusion head and the storage base of this utility model.

[0019] The labels in the diagram represent: 1. Baffle; 11. Storage slot; 12. Through hole; 13. Arc-shaped cavity; 14. Sealed base; 15. Knob; 21. Powder tamping head; 22. Lifting rod; 23. Stop block; 24. Handle; 3. Storage base; 31. Threaded hole; 32. Arc-shaped extrusion head; 33. Screw. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0021] The present invention will be further described below with reference to the embodiments.

[0022] Example 1

[0023] Reference Figure 1-5 This first embodiment of the present invention discloses a portable coffee tamper with adjustable extraction pressure, comprising a baffle plate 1 precision machined from 6061 aluminum alloy and a storage groove 11 formed at the bottom of the baffle plate 1. A through hole 12 is formed through the storage groove 11 at the top of the baffle plate 1. Two centrally symmetrically distributed arc-shaped cavities 13 are formed on the inner wall of the through hole 12. A tamping head 21 is provided in the storage groove 11. The tamping head 21 is made of food-grade stainless steel, and a lifting rod 22 passing through the through hole 12 is vertically fixed to its top. The diameter of the lifting rod 22 and the gap between it and the through hole 12 are recommended to be 0.1-0.3mm. The lifting rod 22 is made of high-strength aluminum alloy. The outer rod wall is laser-engraved with pressure scales ranging from 5 to 15 Bar, with each Bar as a scale unit. A red mark is provided at 9 Bar as a standard pressure reference point for espresso. Arc-shaped extrusion heads 32 made of phosphor bronze are telescopically slidably installed in both arc-shaped cavities 13. The friction coefficient of phosphor bronze is recommended to be 0.15-0.3, the minimum locking torque requirement is recommended to be ≥0.5 N·m, and the radial stroke range of the arc-shaped extrusion heads 32 is recommended to be 2-5mm. The arc-shaped extrusion heads 32 press against the outer rod wall of the lifting rod 22.

[0024] Example 2

[0025] Reference Figure 1-5 This is the second embodiment of the present invention. The difference between this embodiment and the first embodiment is that: a sealing base 14 made of POM engineering plastic is installed in the internal thread of the storage groove 11. The top of the sealing base 14 contacts the bottom of the powder pressing head 21. A knob 15 covered with anti-slip silicone is fixedly installed at the bottom of the sealing base 14. The knob 15 is hidden in the storage groove 11. In daily use, the powder pressing head 21 is protected by the sealing base 14 and the baffle 1 to avoid dust and impurities from contaminating it. A stop block 23 made of zinc alloy die casting is fixedly installed at the top of the lifting rod 22. A handle 24 covered with TPE soft rubber is fixedly installed at the top of the stop block 23. Two centrally symmetrically distributed storage seats 3 are fixedly installed on the outer ring wall of the baffle 1. The two storage bases 3 are made of the same 6061 aluminum alloy as the baffle 1. Each base has an internal storage cavity that communicates with two arc-shaped cavities 13. On the opposite side of each storage base 3, threaded holes 31 are formed through the storage cavities. Screws 33 made of 304 stainless steel are threaded into each of the two threaded holes 31, with the ends of the screws 33 extending into the storage cavities. A rotating plate made of brass is vertically fixed to each screw, and the two rotating plates are respectively embedded in and rotatably mounted within the corresponding arc-shaped extrusion heads 32. (See the instruction manual attached.) Figure 5 As can be seen, a rotating hole is provided on the back of the arc-shaped extrusion head 32, and a rotating cavity communicating with the rotating hole is provided inside the arc-shaped extrusion head 32. The rotating plate is adapted to be rotatably installed in the rotating cavity, ensuring that the rotation of the screw 33 will drive the arc-shaped extrusion head 32 to slide in the corresponding arc-shaped cavity 13. When the two screws 33 rotate in opposite directions, the two arc-shaped extrusion heads 32 move towards each other or away from each other, which is convenient for operation.

[0026] The remaining structure is the same as that in Example 1.

[0027] The working process of this portable coffee tamper with adjustable extraction pressure can be divided into three stages: pressure adjustment, tamping, and cleaning. The specific working process of each stage is as follows: 1. Pressure Regulation Phase Step 1: The user first removes the sealing base 14 by thread beforehand, and then observes the pressure scale engraved on the lifting rod 22 to determine the required pressure value (such as 9 Bar standard Italian pressure).

[0028] Step 2: Rotate the screw 33 located in the storage base 3. The rotation of the screw 33 causes the rotating plate at the end to rotate, which in turn pushes the arc-shaped extrusion head 32 to move radially within the arc-shaped cavity 13.

[0029] Step 3: The two symmetrically distributed arc-shaped extrusion heads 32 simultaneously approach the lifting rod 22 until they make close contact with the outer wall of the lifting rod 22. At this time, the radial pressure generated by the arc-shaped extrusion heads 32 firmly locks the lifting rod 22 in the current position.

[0030] Step 4: By checking the connection between the upper edge of the baffle 1 and the lifting rod 22, the current pressure scale value can be confirmed, and the pressure preset is completed. This locking structure ensures that the pressure value will not drift during subsequent powder pressing.

[0031] 2. Powder pressing operation stage Step 1: Place the coffee bowl filled with coffee powder steadily on the horizontal platform, ensuring that the bottom of the baffle plate 1 is completely in contact with the top edge of the coffee bowl.

[0032] Step 2: The user holds the handle 24 and applies even pressure downwards in a vertical direction. At this time, the lifting rod 22 drives the tamping head 21 to move downwards, starting to compress the coffee powder.

[0033] Step 3: When the tamping head 21 comes into contact with the coffee powder, as the pressure increases, the coffee powder is gradually compressed into a dense puff.

[0034] Step 4: When the powder pressing head 21 reaches the preset limit position (determined by the locking position of the lifting rod 22), the pressure reaches the preset value, and the powder pressing operation is completed.

[0035] 3. Reset and cleaning phase Step 1: After pressing the powder, lift the handle 24 upwards, and the lifting rod 22 will drive the pressing head 21 back to the initial position.

[0036] Step 2: Loosen the locking of the arc-shaped extrusion head 32 to the lifting rod 22 by rotating screw 33, and readjust the pressure value as needed.

[0037] Step 3: After cleaning, reinstall the powder pressing head 21 into the storage slot 11, tighten the sealing base 14, and restore the equipment to standby status.

[0038] Key structural collaborative operation description The baffle plate 1 and the storage groove 11 constitute the main support structure, providing a stable force transmission path for the entire powder pressing process.

[0039] The lifting rod 22 is rigidly connected to the powder pressing head 21 to ensure efficient pressure transmission. The pressure scale on its surface provides an intuitive adjustment reference.

[0040] The adjustment mechanism, consisting of the arc-shaped extrusion head 32 and the screw 33, achieves stepless adjustment and reliable locking of the pressure value through precise mechanical coordination.

[0041] This design, through the coordinated operation of the above structures, achieves precise control and stable maintenance of pressure during the coffee tamping process, effectively solving the technical problem of unstable pressure in traditional tampers.

[0042] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the embodiments of this utility model.

Claims

1. A portable coffee tamper with adjustable extraction pressure, characterized in that, Includes a baffle plate (1) and a storage groove (11) at the bottom of the baffle plate (1). The baffle plate (1) has a through hole (12) through the storage groove (11) at the top. The inner wall of the through hole (12) has two centrally symmetrically distributed arc-shaped cavities (13). A powder pressing head (21) is provided in the storage groove (11). The top of the powder pressing head (21) is vertically fixedly connected to a lifting rod (22) that passes through the through hole (12). The outer wall of the lifting rod (22) is engraved with pressure scale. Arc-shaped extrusion heads (32) that press against the outer wall of the lifting rod (22) are telescopically installed in both arc-shaped cavities (13).

2. The portable coffee tamper with adjustable extraction pressure according to claim 1, characterized in that, The storage slot (11) is threaded with a sealing base (14), the top of which contacts the bottom of the powder pressing head (21).

3. A portable coffee tamper with adjustable extraction pressure according to claim 2, characterized in that, A knob (15) is fixedly installed on the bottom of the sealing base (14), and the knob (15) is hidden in the storage groove (11).

4. A portable coffee tamper with adjustable extraction pressure according to claim 1, characterized in that, A stop (23) is fixedly installed on the top of the lifting rod (22), and a handle (24) is fixedly installed on the top of the stop (23).

5. A portable coffee tamper with adjustable extraction pressure according to claim 1, characterized in that, Two centrally symmetrically distributed storage seats (3) are fixedly installed on the outer ring wall of the baffle (1). Each of the two storage seats (3) has a storage cavity that communicates with two arc-shaped cavities (13). The two storage seats (3) have threaded holes (31) through the storage cavity on the side away from each other.

6. A portable coffee tamper with adjustable extraction pressure according to claim 5, characterized in that, Screws (33) are threaded into both of the two threaded holes (31). The threads of the two screws (33) are opposite. The ends of the two screws (33) extend into the receiving cavity and are vertically fixed with rotating plates. The two rotating plates are respectively embedded and rotated in the corresponding arc-shaped extrusion heads (32).

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