A double-stage pressure mild release based impact coffee pounder

Abstract

The utility model discloses a kind of impact coffee powder hammer based on two-stage pressure gentle release, mainly related to coffee making equipment technical field;Including pressing sleeve and the powder bowl support sleeve compatible with powder bowl, powder head;The outer diameter of the powder head is compatible with the inner diameter of powder bowl, the inner diameter of the powder bowl support sleeve is less than the outer diameter of powder bowl;The bottom end of the pressing sleeve is inserted into powder bowl support sleeve and can slide up and down in powder bowl support sleeve, the top of the powder head is equipped with power transmission piece in middle part, main impact spring, guide sleeve are sequentially equipped from top to bottom in the pressing sleeve, vice impact spring, opening and closing structure compatible with power transmission piece are sequentially equipped from top to bottom in the guide sleeve;The utility model uses large-size punch, gentle impact, so that impact force distribution more uniform secondary impact mechanism, let force distribution be more uniform in powder cake, guarantee the stable extraction of powder cake.

Description

Technical Field

[0001] This utility model relates to the field of coffee making equipment technology, specifically an impact coffee tamper based on a two-stage pressure gentle release. Background Technology

[0002] A coffee tamper is a common tool in espresso making. When making espresso, the coffee grounds must first be compacted into a flat and uniform "paste" before extraction. The quality of tamping directly affects the quality of the coffee. Uneven tamping and uneven internal density will create a channeling effect during extraction, causing steam and water to only pass through the sparser parts, resulting in over-extraction while the compacted areas are under-extracted.

[0003] Currently, most existing tampers are impact tampers, which have the problem of a single and uncontrollable impact force release method. Specifically, this manifests as follows: 1) Instantaneous high pressure causes coffee puck delamination: Existing tampers release high impact force in a single burst (peak value of about 30 lbs / 13.6 kg), with the pressure concentrated on the surface and center of the coffee puck, leading to edge cracking and density delamination; the later impact force is too large, which can easily damage the surface distribution structure of the coffee powder, resulting in surface defects such as cracks and pits; 2) Uncontrollable energy release: The impact head area of ​​existing tampers is small, and the impact force is concentrated in the center of the coffee puck, resulting in a poor pressure gradient and failing to solve the edge effect. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide an impact-type coffee tamper based on a two-stage pressure gentle release. It adopts a large-sized punch head and a gentle impact, and a secondary impact mechanism that makes the impact force distribution more uniform, so that the impact force is more evenly distributed in the coffee puck and ensures stable extraction of the coffee puck.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an impact-type coffee tamper based on dual-stage pressure gentle release, comprising a pressing sleeve, a coffee bowl support sleeve adapted to the coffee bowl, and a tamper head; the top of the tamper head is inserted into the coffee bowl support sleeve and can slide up and down within it, the outer diameter of the tamper head is adapted to the inner diameter of the coffee bowl, and the inner diameter of the coffee bowl support sleeve is smaller than the outer diameter of the coffee bowl; the bottom of the pressing sleeve is inserted into the coffee bowl support sleeve and can slide up and down within it, a power transmission component is provided at the center of the top of the tamper head, a main impact spring and a guide sleeve are arranged sequentially from top to bottom inside the pressing sleeve, and a secondary impact spring and an opening and closing structure adapted to the power transmission component are arranged sequentially from top to bottom inside the guide sleeve; when the pressing sleeve moves to its lowest point, the opening and closing structure opens, the power transmission component passes through the opening and closing structure, and the guide sleeve moves down to impact the tamper head.

[0006] Preferably, the power transmission component is cylindrical and its top surface is arc-shaped. The opening and closing structure includes a slider disposed at the bottom of the secondary impact spring. The slider can slide up and down within the guide sleeve. The slider has a central hole adapted to the power transmission component. The left and right sides of the outer wall of the slider are provided with grooves communicating with the central hole. A guide shaft is slidably disposed within the grooves. The guide sleeve has an L-shaped guide groove adapted to the guide shaft. The vertical part of the L-shaped guide groove is located at the bottom of the horizontal part of the L-shaped guide groove.

[0007] Preferably, the top of the powder pressing head is provided with a cavity adapted to the pressing sleeve, and the power transmission component is located in the middle of the bottom of the cavity.

[0008] Preferably, the outer wall of the bottom of the pressing sleeve is provided with a first flange extending outward, and the top of the pressing head is provided with a pressing head end cap adapted to the first flange. The pressing sleeve vertically penetrates the pressing head end cap and is slidably connected to the pressing head end cap.

[0009] Preferably, the top of the powder bowl support sleeve is provided with a support sleeve end cap, and the pressing sleeve vertically penetrates the support sleeve end cap and is slidably connected to the support sleeve end cap.

[0010] Preferably, the powder pressing head is fitted with a powder bowl support and return spring, the outer wall of the powder pressing head is provided with a first limiting platform, the inner wall of the powder bowl support sleeve is provided with a second limiting platform, the top end of the powder bowl support and return spring abuts against the first limiting platform, and the other end abuts against the second limiting platform.

[0011] Preferably, the power transmission component is fitted with an impact return spring, the bottom end of which abuts against the powder pressing head, and the top end of which abuts against the opening and closing structure.

[0012] Compared with existing technologies, the advantages of this invention are as follows: The outer diameter of the pressing head matches the inner diameter of the powder bowl, enabling it to cover a larger area, taking into account both the center point and the outer ring area. This avoids the impact force being concentrated at the center point or over the outer ring area, eliminating pressure impact concentrated at the center point and edges. During use, the pressing sleeve is pressed down. During the pressing process, the secondary impact spring stores energy to provide continuous pressure, completing the initial compaction of the powder layer with minimal density uniformity error. Until the pressing sleeve moves to the lowest point, the opening and closing structure opens, the power transmission component passes through the opening and closing structure, the main impact spring releases its stored energy, and the guide sleeve moves down to impact the pressing head. This extends the pressure application time, avoids damage from instantaneous high pressure, and solves the problem of powder cake structure damage caused by instantaneous high pressure in traditional impact powder pressers. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the planar structure of this utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 3 This is a three-dimensional structural diagram of the powder pressing head.

[0016] Figure 4 This is a three-dimensional structural diagram of the guide sleeve.

[0017] Figure 5 This is a schematic diagram of the internal structure of the guide sleeve.

[0018] Figure 6 This is a schematic diagram of the closed state of the opening and closing structure.

[0019] Figure 7 This is a schematic diagram of the open / closed structure in its open state.

[0020] The following are the labeling elements in the attached diagram: 1. Pressing sleeve; 11. First flange; 2. Powder bowl support sleeve; 21. Support sleeve end cap; 22. Second limiting platform; 3. Powder pressing head; 31. Power transmission component; 32. Cavity; 33. Powder pressing head end cap; 34. Powder bowl support return spring; 35. First limiting platform; 36. Impact return spring; 4. Main impact spring; 5. Guide sleeve; 6. Secondary impact spring; 7. Opening and closing structure; 71. Slider; 72. Slide groove; 73. Guide shaft; 74. L-shaped guide groove. Detailed Implementation

[0021] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the present invention, and these equivalent forms also fall within the scope defined in this application.

[0022] Example: As attached Figure 1-7 As shown, this utility model describes an impact-type coffee tamper based on a two-stage pressure gentle release mechanism. It includes a pressing sleeve 1, a coffee bowl support sleeve 2 adapted to the coffee bowl, and a tamper head 3. The top of the tamper head 3 is inserted into the coffee bowl support sleeve 2 and can slide up and down within it. The outer diameter of the tamper head 3 is adapted to the inner diameter of the coffee bowl, but slightly smaller, allowing it to be inserted and move up and down within the bowl. The inner diameter of the coffee bowl support sleeve 2 is smaller than the outer diameter of the coffee bowl; preferably, the inner diameter is the same as the inner diameter of the coffee bowl. The coffee bowl support sleeve 2 is placed on top of the coffee bowl, and the bottom of the tamper head 3 is inserted into it.

[0023] The bottom end of the pressing sleeve 1 is inserted into the powder bowl support sleeve 2 and can slide up and down in the powder bowl support sleeve 2. The middle of the top of the powder pressing head 3 is provided with a power transmission component 31. The pressing sleeve 1 is provided with a main impact spring 4 and a guide sleeve 5 from top to bottom. The guide sleeve 5 is provided with a secondary impact spring 6 and an opening and closing structure 7 adapted to the power transmission component 31 from top to bottom. When the pressing sleeve 1 moves to the lowest point, the opening and closing structure 7 opens, the power transmission component 31 passes through the opening and closing structure 7, and the guide sleeve 5 moves down to impact the powder pressing head 3.

[0024] Preferred options are listed below. Figure 4 As shown, the power transmission component 31 is cylindrical with an arc-shaped top surface. The opening and closing structure 7 includes a slider 71 disposed at the bottom of the secondary impact spring 6. The slider 71 is preferably cylindrical, with its outer diameter slightly smaller than the inner diameter of the guide sleeve 5. The slider 71 is located inside the guide sleeve 5 and can slide up and down within it. The slider 71 has a central hole adapted to the power transmission component 31, with the inner diameter of the central hole larger than the outer diameter of the power transmission component 31. The power transmission component 31 can slide up and down along the central hole. The left and right sides of the outer wall of the slider 71 are provided with grooves 72 communicating with the central hole, and the two grooves 72 are symmetrically arranged. A guide shaft 73 is slidably disposed within the slide groove 72. The guide shaft 73 can translate along the slide groove 72. The guide sleeve 5 is provided with an L-shaped guide groove 74 adapted to the guide shaft 73. The vertical part of the L-shaped guide groove 74 is located at the bottom of the horizontal part of the L-shaped guide groove 74. The two L-shaped guide grooves 74 are symmetrically arranged, and the horizontal parts of the L-shaped guide grooves 74 are far apart, which can ensure the stability of the closed and open states. The ends of the two guide shafts 73 are inserted into the corresponding L-shaped guide grooves 74. Under the action of the L-shaped guide grooves 74, the guide shafts 73 can make L-shaped movements and are in the closed and open states at different height positions.

[0025] As attached Figure 4 , 6 As shown, in the closed state, the guide shaft 73 is located at the inner end of the slide groove 72 and at the bottom end of the vertical part of the L-shaped guide groove 74. At this time, the distance between the two guide shafts 73 is less than the outer diameter of the power transmission member 31, and the top end of the power transmission member 31 abuts against the guide shaft 73.

[0026] As attached Figure 7 As shown, when in the open state, the guide shaft 73 is located at the outer end of the slide groove 72 and at the end of the horizontal part of the L-shaped guide groove 74 away from its vertical part. At this time, the distance between the two guide shafts 73 is greater than the outer diameter of the power transmission member 31, and the power transmission member 31 can pass through the two guide shafts 73.

[0027] The top surface of the power transmission component 31 is an arc surface, which can ensure a smooth transition between the power transmission component 31 and the guide shaft 73, so that the power transmission component 31 can smoothly slide from the bottom end of the two guide shafts 73 to between the two guide shafts 73. During the process of adjusting the opening and closing structure 7 from the closed state to the open state, the top surface of the power transmission component 31 always abuts against the two guide shafts 73. At the moment of reaching the open state, the power transmission component 31 passes between the two guide shafts 73.

[0028] The secondary impact spring 6 supports the slider 71 and the guide sleeve 5, keeping them in a separated state. In its natural state, the opening and closing structure 7 is in a closed state. When the guide shaft 73 is subjected to an upward force, the secondary impact spring 6 is compressed. At the same time, under the combined action of the L-shaped guide groove 74 of the guide sleeve 5 and the sliding groove 72 on the slider 71, the guide shaft 73 moves to the open state. At this time, the secondary impact spring 6 is in the maximum compression state, and its compression energy in the compressed state is the main energy during the impact.

[0029] The guide sleeve 5, slider 71, guide shaft 73, and secondary impact spring 6 constitute the impact head assembly. As an independent impact head assembly, the guide sleeve 5, slider 71, guide shaft 73, and secondary impact spring 6 apply downward pressure to the power transmission component 31 on the powder pressing head 3 during the downward pressing process, before the impact state is triggered. This provides the powder pressing head 3 with initial pressure on the powder. At the same time, the secondary impact spring 6 is compressed by the reaction force, causing the guide shaft 73 to begin to move in an L-shape along the L-shaped guide groove 74.

[0030] During the pressing of the sleeve 1, the main impact spring 4 primarily provides the force to push the impact head assembly toward the tamping head 3 after the impact is triggered (opening structure 7). When the sleeve 1 is pressed by external force, before the impact is triggered, the main impact spring 4 presses the impact head assembly, and then the impact head assembly transmits the force to the tamping head 3 to perform the first stage of tamping the coffee powder.

[0031] When the pressure reaches a certain level, the guide shaft 73 inside the impact head assembly reaches the open state of the opening and closing structure 7, triggering the impact state. At this time, the main impact spring 4 releases the stored energy after being compressed in the first stage, pushing the impact head assembly towards the powder compaction head 3 to achieve the second stage of impact compaction.

[0032] When the guide shaft 73 moves in an L-shape until the opening and closing structure 7 is in the open state, that is, when the secondary impact spring 6 is compressed to its maximum, the power transmission component 31 on the tamping head 3 passes through the slider 71, triggering the impact state. The stored energy of the main impact spring 4 is released instantaneously, pushing the entire impact head assembly towards the bottom of the tamping head 3, impacting the coffee powder through the tamping head 3. The impact also produces a collision sound, serving as feedback that the tamping is complete.

[0033] The aforementioned mechanism's movement can both increase the secondary impact pressure and complete the powder pressing feedback.

[0034] Preferably, the top of the powder pressing head 3 is provided with a cavity 32 adapted to the pressing sleeve 1, and the power transmission component 31 is located in the middle of the bottom of the cavity 32, which makes the structure more compact.

[0035] Furthermore, a first flange 11 extending outward is provided on the outer wall of the bottom of the pressing sleeve 1, and a pressing head end cap 33 adapted to the first flange 11 is provided on the top of the pressing head 3. The pressing sleeve 1 vertically penetrates the pressing head end cap 33 and is slidably connected to the pressing head end cap 33. The pressing head end cap 33 is provided with a central hole adapted to the pressing sleeve 1.

[0036] Furthermore, the top of the powder bowl support sleeve 2 is provided with a support sleeve end cap 21, the pressing sleeve 1 vertically penetrates the support sleeve end cap 21 and is slidably connected to the support sleeve end cap 21, and the support sleeve end cap 21 is provided with a central hole adapted to the pressing sleeve 1.

[0037] Furthermore, a powder bowl support and return spring 34 is fitted onto the powder pressing head 3, a first limiting platform 35 is provided on the outer wall of the powder pressing head 3, and a second limiting platform 22 is provided on the inner wall of the powder bowl support sleeve 2. The top end of the powder bowl support and return spring 34 abuts against the first limiting platform 35, and the other end abuts against the second limiting platform 22. The powder bowl support sleeve 2, the support sleeve end cap 21, and the powder bowl support and return spring 34 serve as a powder bowl support assembly to ensure that the powder pressing head 3 and the powder bowl are always in a coaxial state during the use of this utility model, thus avoiding the problem of pressing deviation.

[0038] Preferably, the power transmission component 31 is fitted with an impact reset spring 36. The bottom end of the impact reset spring 36 abuts against the powder pressing head 3, and the top end abuts against the opening and closing structure 7. The impact reset spring 36 is located between the powder pressing head 3 and the slider 71. After the first stage of compaction and the second stage of impact compaction are completed, the pressure on the pressing sleeve 1 is released, and the entire mechanism is restored to its initial state, that is, the support impact head assembly and the pressing sleeve 1 are reset.

Claims

1. An impact-type coffee tamper based on a two-stage pressure gentle release, characterized in that: Includes a pressing sleeve (1), a powder bowl support sleeve (2) adapted to the powder bowl, and a pressing head (3); the top end of the pressing head (3) is inserted into the powder bowl support sleeve (2) and can slide up and down in the powder bowl support sleeve (2), the outer diameter of the pressing head (3) is adapted to the inner diameter of the powder bowl, and the inner diameter of the powder bowl support sleeve (2) is smaller than the outer diameter of the powder bowl; the bottom end of the pressing sleeve (1) is inserted into the powder bowl support sleeve (2) and can slide up and down in the powder bowl support sleeve (2), the pressing head... (3) has a power transmission component (31) in the middle of the top. The pressing sleeve (1) is provided with a main impact spring (4) and a guide sleeve (5) from top to bottom. The guide sleeve (5) is provided with a secondary impact spring (6) and an opening and closing structure (7) adapted to the power transmission component (31) from top to bottom. When the pressing sleeve (1) moves to the lowest point, the opening and closing structure (7) opens, the power transmission component (31) passes through the opening and closing structure (7), and the guide sleeve (5) moves down to hit the powder pressing head (3).

2. The impact-type coffee tamper based on dual-stage pressure gentle release according to claim 1, characterized in that: The power transmission component (31) is cylindrical and the top surface of the power transmission component (31) is an arc surface. The opening and closing structure (7) includes a slider (71) set at the bottom of the secondary impact spring (6). The slider (71) can slide up and down in the guide sleeve (5). The slider (71) is provided with a central hole adapted to the power transmission component (31). The left and right sides of the outer wall of the slider (71) are provided with a sliding groove (72) communicating with the central hole. The guide shaft (73) is slidably provided in the sliding groove (72). The guide sleeve (5) is provided with an L-shaped guide groove (74) adapted to the guide shaft (73). The vertical part of the L-shaped guide groove (74) is located at the bottom of the horizontal part of the L-shaped guide groove (74).

3. The impact-type coffee tamper based on dual-stage pressure gentle release according to claim 1 or 2, characterized in that: The top of the powder pressing head (3) is provided with a cavity (32) adapted to the pressing sleeve (1), and the power transmission component (31) is located in the middle of the bottom of the cavity (32).

4. The impact-type coffee tamper based on dual-stage pressure gentle release according to claim 3, characterized in that: The pressing sleeve (1) has a first flange (11) extending outward on the outer wall of the bottom. The pressing head (3) has a pressing head end cap (33) adapted to the first flange (11) at the top. The pressing sleeve (1) vertically penetrates the pressing head end cap (33) and is slidably connected to the pressing head end cap (33).

5. The impact coffee tamper based on dual-stage pressure gentle release according to claim 4, characterized in that: The top of the powder bowl support sleeve (2) is provided with a support sleeve end cap (21), and the pressing sleeve (1) vertically penetrates the support sleeve end cap (21) and is slidably connected to the support sleeve end cap (21).

6. The impact coffee tamper based on dual-stage pressure gentle release according to claim 5, characterized in that: The powder pressing head (3) is fitted with a powder bowl support return spring (34). The outer wall of the powder pressing head (3) is provided with a first limiting platform (35). The inner wall of the powder bowl support sleeve (2) is provided with a second limiting platform (22). The top end of the powder bowl support return spring (34) abuts against the first limiting platform (35), and the other end abuts against the second limiting platform (22).

7. The impact-type coffee tamper based on dual-stage pressure gentle release according to claim 1, characterized in that: An impact return spring (36) is fitted on the power transmission component (31). The bottom end of the impact return spring (36) abuts against the powder pressing head (3), and the top end abuts against the opening and closing structure (7).

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