Powder pressing hammer for grinding coffee

Abstract

The utility model relates to the technical field of coffee appliances, in particular to a powder pressing hammer for grinding coffee, which comprises a handle, a first main rod, a second main rod, a positioning ring and a hammer head arranged at the bottom of the positioning ring. The first main rod penetrates through the second main rod and is fixedly connected with the handle, the first main rod and the second main rod can slide relatively, and a first stroke cavity is formed among the first main rod, the handle and the second main rod; a strong pressure spring is arranged on the second main rod, and the strong pressure spring can hinder the relative movement of the first main rod and the second main rod; the second main rod is sleeved with the positioning ring, the positioning ring can slide relative to the second main rod, a second stroke cavity is formed by the positioning ring and the side face of the second main rod, a pre-pressing spring is arranged in the second stroke cavity, and the bottom face of the hammer head is parallel to the bottom face of the positioning ring. According to the utility model, after powder pressing, the surface of the powder is smooth and the internal density is uniform.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee utensils, in particular to a coffee powder pressing hammer for grinding coffee. Background Art

[0002] One of the processes in making espresso is powder pressing. The purpose of powder pressing is to compact the coffee powder in the powder bowl to form resistance and ensure that the coffee is extracted under high pressure.

[0003] During the coffee brewing process, whether the coffee powder is compacted evenly will affect the quality of coffee extraction. The influencing factors are: if the coffee powder is not compacted flat, water will flow out from the thinner part first, resulting in uneven extraction. On the other hand, due to factors such as static electricity or the oil and moisture contained in the coffee powder itself, agglomeration is likely to occur, resulting in uneven overall density of the powder, which causes water to flow preferentially from the less dense part, resulting in uneven extraction.

[0004] Citing the prior art CN218899179U, the name is "A balanced constant force powder pressing hammer", and its technical solution includes a powder pressing hammer body; the powder pressing hammer body includes a main rod, a powder pressing handle and a powder pressing bottom plate; the powder pressing handle and the powder pressing bottom plate are respectively arranged at the upper and lower ends of the main rod; a first force-bearing elastic element is installed between the main rod and the powder pressing handle; a second force-bearing elastic element is installed between the powder pressing bottom plate and the powder pressing handle. The above technical solution is provided with force-bearing elastic units between the powder pressing handle and the main rod, and between the powder pressing bottom plate and the main rod, that is, through the design of double springs, it is unnecessary to adjust the height adjustment mechanism and ensure that the powder pressing hammer maintains balance to press the coffee powder with a constant pressure of 30 pounds, so that the powder surface is flat and not tilted. However, when the powder pressing hammer in the above comparative document is pressed down, it cannot be guaranteed that the descending direction of the hammer head is perpendicular to the horizontal plane, and there is still a problem of an angle between the powder plane and the horizontal plane. Utility Model Content

[0005] The utility model aims to overcome the deficiencies of the prior art and provides a coffee powder pressing hammer for grinding coffee, which has compression strokes at both ends and can solve the problem of an angle between the hammer head and the horizontal plane when pressing coffee powder.

[0006] In order to solve the above problems, the utility model proposes a coffee powder tamping hammer for grinding coffee, comprising a handle, a first main rod, a second main rod, a positioning ring and a hammer head arranged at the bottom of the positioning ring;

[0007] The first main rod passes through the second main rod and is fixedly connected to the handle. The first main rod and the second main rod can slide relative to each other, and a first stroke cavity is formed between the first main rod, the handle and the second main rod.

[0008] A strong pressure spring is provided on the second main rod, and the strong pressure spring can hinder the relative movement between the first main rod and the second main rod;

[0009] The second main rod is sleeved with the positioning ring, and the positioning ring can slide relative to the second main rod. The positioning ring and the side of the second main rod form a second stroke cavity, and a preload spring is provided in the second stroke cavity. The bottom surface of the hammer head and the bottom surface of the positioning ring are parallel to each other.

[0010] As an improvement of the above technical solution, the high pressure spring is arranged in the first stroke cavity, and the high pressure spring is sleeved on the first main rod, one end of which is abutted or fixedly connected to the top of the second main rod, and the other end is abutted or fixedly connected to the top of the handle stroke cavity.

[0011] As an improvement of the above technical solution, a accommodating space is provided in the second main rod, and the high pressure spring is arranged in the accommodating space. One end of the high pressure spring abuts or is fixedly connected to the hammer head, and the other end abuts or is fixedly connected to the bottom of the first main rod.

[0012] As an improvement of the above technical solution, the acting force of the preload spring is 0.45-45N.

[0013] As an improvement of the above technical solution, the stiffness coefficient of the strong pressure spring is greater than that of the pre-compression spring.

[0014] As an improvement of the above technical solution, the hammer head is fixedly connected to the second main rod, and the diameter of the hammer head is smaller than the outer diameter of the positioning ring.

[0015] As an improvement of the above technical solution, a limiting portion is provided at one end of the first main rod inside the second main rod.

[0016] As an improvement of the above technical solution, it further includes a driving mechanism, wherein the driving mechanism is used to press the handle;

[0017] The driving mechanism can adjust the pressure and time applied to the pre-compression spring in the first compression stroke, and / or can adjust the pressure and time applied to the strong compression spring in the second compression stroke.

[0018] As an improvement of the above technical solution, a friction portion is provided on the top of the handle portion, and the friction portion is formed by a plurality of convex strips parallel to each other.

[0019] As an improvement of the above technical solution, the bottom of the hammer head is provided with a plurality of concentrically arranged annular convex strips.

[0020] The implementation of this utility model has the following beneficial effects:

[0021] The utility model includes a handle, a first main rod, a second main rod, a positioning ring and a hammer head, wherein a first stroke cavity is formed between the first main rod, the handle and the second main rod, and a strong pressure spring is provided on the second main rod; the positioning ring and the side of the second main rod form a second stroke cavity, and a pre-compression spring is provided in the second stroke cavity. When pressing the powder, the positioning ring abuts against the powder bowl, and when pressure is applied to the handle, the positioning ring and the second main rod slide relative to each other until the pre-compression spring is in a compressed state; then, continue to apply pressure to the handle, and the first main rod and the handle slide relative to the second main rod, so that the strong pressure spring is in a compressed state until the hammer head completely compacts the coffee powder. Compared with the prior art, the powder pressing hammer of the utility model has two compression strokes. The first stage pre-compresses the powder to make the powder relatively flat and relatively uniform in density, and the second stage completely compresses to obtain powder with uniform density and flatness. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional schematic diagram of a powder compacting hammer of the utility model;

[0023] Figure 2 A schematic cross-sectional view of a first embodiment of a powder compacting hammer according to the utility model;

[0024] Figure 3 yes Figure 2 A is an enlarged schematic diagram;

[0025] Figure 4 It is a cross-sectional schematic diagram of the second embodiment of the powder compacting hammer of the utility model;

[0026] Figure 5 It is a front view of a third embodiment of a powder compacting hammer of the present utility model. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the utility model clearer, the utility model will be further described in detail below with reference to the accompanying drawings.

[0028] See also Figure 1 The utility model provides a coffee powder tamping hammer for grinding coffee, comprising a handle 1, a first main rod 2, a second main rod 3, a positioning ring 4 and a hammer head 5 arranged at the bottom of the positioning ring 4.

[0029] The embodiment of the utility model improves the structure of a powder pressing hammer, so as to solve the problems of an inclined powder pressing working surface and uneven force of the powder pressing hammer in the prior art.

[0030] Specifically, the first main rod 2 passes through the second main rod 3 and is fixedly connected to the handle 1. The first main rod 2 and the second main rod 3 can slide relative to each other, and a first stroke cavity 11 is formed between the first main rod 2, the handle 1 and the second main rod 3.

[0031] The second main rod 3 is provided with a strong pressure spring 12, and the strong pressure spring 12 can hinder the relative movement between the first main rod 2 and the second main rod 3;

[0032] The second main rod 2 is sleeved with the positioning ring 4, and the positioning ring 4 can slide relative to the second main rod 3. The positioning ring 4 and the side of the second main rod 3 form a second stroke cavity 41, and a preload spring 42 is provided in the second stroke cavity 41. The bottom surface of the hammer head and the bottom surface of the positioning ring are parallel to each other.

[0033] The utility model comprises a handle 1, a first main rod 2, a second main rod 3, a positioning ring 4 and a hammer head 5, wherein a first stroke chamber 11 is formed between the first main rod 2, the handle 1 and the second main rod 3, and a strong pressure spring 12 is provided on the second main rod 3; the positioning ring 4 and the side of the second main rod 3 form a second stroke chamber 41, and a pre-compression spring 42 is provided in the second stroke chamber 41. When pressing powder, the positioning ring 4 abuts against the powder bowl, and when pressure is applied to the handle 1, the positioning ring 4 and the second main rod 3 slide relative to each other until the pre-compression spring 42 is in a compressed state; then, pressure is continuously applied to the handle 1, and the first main rod 2 and the handle 1 slide relative to the second main rod 3, so that the strong pressure spring 12 is in a compressed state until the hammer head 5 completely compacts the coffee powder. Compared with the prior art, the powder pressing hammer of the utility model has two compression strokes, the first stage pre-compresses the powder to make the powder relatively flat and relatively uniform in density, and the second stage fully compresses to obtain a powder with uniform density and flatness.

[0034] The strong pressure spring 12 of the utility model can hinder the relative movement of the first main rod 2 and the second main rod 3, and takes effect in the second compression stroke of the compacted powder, and its implementation methods are various. Figure 2 and Figure 3 The utility model provides a first embodiment of a powder compacting hammer, wherein the strong pressure spring 12 is arranged in the first stroke cavity 11, and the strong pressure spring 12 is sleeved on the first main rod 2, and one end of the strong pressure spring 12 is abutted or fixedly connected to the top of the second main rod 3, and the other end is abutted or fixedly connected to the top of the handle stroke cavity 11. The spring is arranged in the first stroke cavity 11, and it can provide a reaction force when the handle 1 is pressed downward, so that a certain pressure must be increased to enable the first main rod 2 to slide relative to the second main rod 3, which plays a pre-compression effect of the first compression stroke, and can automatically reset the handle 1 when the pressure on the handle 1 is removed.

[0035] See also Figure 4 The utility model provides a second embodiment of a powder compacting hammer, wherein a containing space 31 is provided in the second main rod 3, and the first main rod 2 passes through the second main rod 3 and extends into the containing space 31;

[0036] The strong pressure spring 12 is disposed in the accommodating space 31 , one end of the strong pressure spring 12 is in contact with or fixedly connected to the hammer head 5 , and the other end of the strong pressure spring 12 is in contact with or fixedly connected to the bottom of the first main rod 2 .

[0037] In this embodiment, the strong pressure spring 12 is disposed in the second main rod 3, and is used to prevent the relative sliding between the first main rod 2 and the second main rod 3. When the user applies pressure to the handle 1, the first main rod 2 follows the handle and slides relative to the second main rod 3. At this time, the strong pressure spring 12 is compressed, exerting a reaction force on the first main rod 2, and preventing the first main rod 2 and the second main rod 3 from sliding relative to each other.

[0038] Preferably, the force of the pre-compression spring 42 is 0.45-45N. During the first stage of compression, the positioning ring 4 needs to be positioned with the powder bowl containing coffee powder. At this time, the pre-compression spring 41 is compressed first, and the positioning ring 4 slides relative to the second main rod 3, which plays a positioning and guiding role for the second main rod 3. In addition, the first stage of compression needs to pre-compress the coffee powder, so the force of the pre-compression spring 42 is 0.45-45N. When the force of the pre-compression spring 42 is less than 0.45N, it cannot effectively pre-compress the coffee powder; when the force of the pre-compression spring 42 is greater than 45N, the coffee powder will be completely compacted.

[0039] More preferably, the stiffness coefficient of the strong pressure spring 12 is greater than that of the pre-compression spring 42. The utility model uses two springs with different stiffness coefficients, preferably the stiffness coefficient of the pre-compression spring 42 is smaller than that of the strong pressure spring 12, so that the pre-compression spring 42 is easier to deform than the strong pressure spring 12, in order to ensure that the compression deformation of the pre-compression spring 42 is greater than that of the strong pressure spring 12 in the first compression process.

[0040] Preferably, the hammer head 5 is fixedly connected to the second main rod 3, and the diameter of the hammer head 5 is smaller than the outer diameter of the positioning ring 4. The positioning ring 4 is in contact with the outer edge of the powder bowl to ensure that the positioning ring 4 can play a positioning and guiding role.

[0041] Preferably, a stopper 21 is provided at one end of the first main rod 2 inside the second main rod 3. The stopper 21 can limit the relative sliding of the first main rod 2 and the second main rod 3, thereby preventing the first main rod 2 from falling out of the second main rod 3.

[0042] join Figure 5 The utility model provides a third embodiment of a powder compacting hammer. This embodiment further includes a driving mechanism 6, and the driving mechanism 6 is used to press the handle 1;

[0043] The driving mechanism 6 can adjust the pressure and time applied to the pre-compression spring 42 in the first compression stroke, and / or can adjust the pressure and time applied to the strong compression spring 12 in the second compression stroke.

[0044] This embodiment introduces a driving mechanism 6, which can control the pressure applied to the handle 1 and the time for maintaining the pressure, thereby controlling the compression deformation amplitude and maintenance time of the pre-compression spring 42 and the strong pressure spring 12. Therefore, the third embodiment of the utility model can flexibly adjust the driving mechanism 6 according to the actual situation of the pressed powder to meet the needs of different coffee powder cakes.

[0045] It should be noted that the driving mechanism 6 can be a common driving and pressing device on the market, which can be a pneumatic telescopic rod mechanism, a screw transmission mechanism or an electric push rod.

[0046] Preferably, the driving mechanism 6 is a screw transmission mechanism, which generally includes a driving screw 62 and a driving motor 61, wherein the output end of the driving motor 61 is connected to the driving screw 62, and the slider on the driving screw 62 is connected to the handle 1. The driving motor 62 rotates the driving screw 61, and the slider on the driving screw 61 slides up and down along the surface of the driving screw 61, thereby achieving the purpose of automatically pressing the handle 1.

[0047] Preferably, a friction portion 13 is provided on the top of the handle 1, and the friction portion 13 is formed by a plurality of convex strips parallel to each other. The friction portion 13 can increase the friction between the human hand and the handle, so that the user is not likely to slip when pressing the handle 1.

[0048] Preferably, the bottom of the hammer head 5 is provided with a plurality of concentrically arranged annular convex strips.

[0049] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the protection scope of the present invention.

Claims

1. A coffee powder tamper for grinding coffee, characterized in that: It includes a handle, a first main rod, a second main rod, a positioning ring and a hammer head arranged at the bottom of the positioning ring; The first main rod passes through the second main rod and is fixedly connected to the handle. The first main rod and the second main rod can slide relative to each other, and a first stroke cavity is formed between the first main rod, the handle and the second main rod. A strong pressure spring is provided on the second main rod, and the strong pressure spring can hinder the relative movement between the first main rod and the second main rod; The second main rod is sleeved with the positioning ring, which can slide relative to the second main rod. The positioning ring and the side of the second main rod form a second stroke cavity, and a preload spring is arranged in the second stroke cavity. The bottom surface of the hammer head and the bottom surface of the positioning ring are parallel to each other.

2. The powder compacting hammer according to claim 1, characterized in that: The strong pressure spring is arranged in the first stroke cavity, and the strong pressure spring is sleeved on the first main rod, one end of which is abutted or fixedly connected to the top of the second main rod, and the other end is abutted or fixedly connected to the top of the handle stroke cavity.

3. The powder compacting hammer according to claim 1, characterized in that: An accommodating space is provided in the second main rod, and the strong pressure spring is provided in the accommodating space. One end of the strong pressure spring abuts against or is fixedly connected to the hammer head, and the other end abuts against or is fixedly connected to the bottom of the first main rod.

4. The powder compacting hammer according to any one of claims 1 to 3, characterized in that: The acting force of the preload spring is 0.45-45N.

5. The powder compacting hammer according to any one of claims 1 to 3, characterized in that: The stiffness coefficient of the strong pressure spring is greater than that of the pre-compression spring.

6. The powder compacting hammer according to claim 1, characterized in that: The hammer head is fixedly connected to the second main rod, and the diameter of the hammer head is smaller than the outer diameter of the positioning ring.

7. The powder compacting hammer according to claim 1, characterized in that: A limiting portion is provided at one end of the first main rod inside the second main rod.

8. The powder compacting hammer according to claim 1, characterized in that: Also included is a driving mechanism, the driving mechanism is used to press the handle; The driving mechanism can adjust the pressure and time applied to the pre-compression spring in the first compression stroke, and / or can adjust the pressure and time applied to the strong compression spring in the second compression stroke.

9. The powder compacting hammer according to claim 1, characterized in that: A friction portion is provided on the top of the handle portion, and the friction portion is formed by a plurality of convex strips parallel to each other.

10. The powder compacting hammer according to claim 1, characterized in that: The bottom of the hammer head is provided with a plurality of concentrically arranged annular convex strips.

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