Brewing device with plane residue scraping mechanism and coffee machine

Abstract

The utility model discloses a brewing device with a plane residue scraping mechanism and a coffee machine, which comprise a frame, a driving main shaft, an upper piston, a brewing cylinder and a lower piston, the driving main shaft is rotatably mounted on the frame, the upper piston is directly or indirectly fixed on the frame, the brewing cylinder is mounted on the driving main shaft, the lower piston is mounted in the brewing cylinder, and the brewing cylinder is driven by the driving main shaft to move along with the lower piston. The upper piston and the lower piston close the brewing cylinder to form a brewing chamber, and the residue scraping mechanism comprises a residue scraping assembly which is rotationally installed on the brewing cylinder; the elastic piece is sleeved on the residue scraping assembly, the first end of the elastic piece is propped against the residue scraping assembly, the second end of the elastic piece is propped against the brewing cylinder, and the elastic piece is used for resetting the residue scraping assembly to the original point when the lower piston ascends; the limiting piece is installed on the frame and located below the slag scraping assembly; when the driving main shaft drives the brewing cylinder to descend to the limiting position, the slag scraping assembly gradually descends until the slag scraping assembly abuts against the limiting piece, and the slag scraping assembly rotates along the brewing cylinder to scrape slag. The structure is simple, the practicability is high, and the production cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of coffee machines, in particular to a brewing device with a flat scraping mechanism and a coffee machine. Background Art

[0002] A coffee machine is a machine used to make coffee. It can grind coffee beans, apply pressurized steam, or pump water to make coffee. Coffee machines typically have multiple functions, such as adjusting coffee strength and making different types of coffee. They are widely used in homes, offices, coffee shops, and other places.

[0003] Current coffee machines pour coffee powder into a brewing cylinder, squeeze it, and then pump the brewed coffee solution into a coffee cup through a brew head. The brewing chamber in the prior art consists of an upper piston, a brewing cylinder, and a lower piston. The lower piston is slidably mounted on the brewing cylinder. When a driving mechanism drives the brewing cylinder and lower piston upward, a blocking mechanism ensures that the lower piston's upward speed is slower than the brewing cylinder's upward speed, causing the lower piston to gradually descend relative to the brewing cylinder. After adding coffee powder, the driving mechanism continues to raise the brewing cylinder and lower piston until the upper piston extends into the brewing cylinder, forming a brewing chamber between the upper piston, the brewing cylinder, and the lower piston. After brewing is complete, the driving mechanism drives the brewing cylinder and lower piston downward. The blocking mechanism ensures that the lower piston's downward speed is slower than the brewing cylinder's downward speed, causing the lower piston to gradually ascend relative to the brewing cylinder until the top of the lower piston is parallel to the top of the brewing cylinder. A scraping mechanism then removes the coffee grounds from the brewing cylinder.

[0004] Existing slag discharge devices, such as the U.S. invention patent with publication number US5333537A and the Chinese utility model patent with publication number CN213216513U, both provide a slag discharge device on the brewing cylinder. The slag discharge device rotates around the brewing cylinder, and the rotation path corresponds to the arc-shaped upper surface of the lower piston. When discharging slag, the top of the slag discharge device rotates along the upper surface of the lower piston and pushes the coffee powder cake on the upper surface of the lower piston away from the lower piston. Although this slag discharge method can better separate the coffee powder cake, during production and processing, the filter screen and the liquid separator seat on the upper surface of the lower piston must be arc-shaped, otherwise the slag discharge will not be clean and coffee grounds will remain in the filter screen. The arc-shaped filter screen and the liquid separator seat have complex processing technology and high processing cost, and the arc-shaped filter screen and the liquid separator seat will cause the capacity in the brewing cylinder to become smaller.

[0005] Existing slag discharge devices include Chinese invention patent publication number CN104053384B, Chinese utility model patent publication number CN208211911U, and Chinese utility model patent publication number CN201260608Y. These three patents all disclose a rotary slag pushing method, that is, a scraper of the slag discharge device rotates parallel to the upper surface of the lower piston to push out the coffee powder cake on the upper surface of the lower piston, and the filter and the liquid separation seat are both flat. Although the brewing device with this structure can reduce the residual coffee powder and also allow the coffee powder in the brewing cylinder to be brewed simultaneously, the structure of the slag discharge device is complex and the cost is relatively high.

[0006] In view of this, it is necessary to propose new technical solutions to solve the above technical problems. Utility Model Content

[0007] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a brewing device and a coffee machine with a planar scraping mechanism to solve the problems raised in the background technology.

[0008] In order to achieve the above-mentioned objectives, the first aspect of the present invention provides a brewing device with a planar scraping mechanism, comprising: a frame, a driving spindle, an upper piston, a brewing cylinder and a lower piston, the driving spindle being rotatably mounted on the frame, the upper piston being directly or indirectly fixed to the frame, the brewing cylinder being mounted on the driving spindle, and the lower piston being mounted in the brewing cylinder. Under the drive of the driving spindle, the upper piston and the lower piston close the brewing cylinder to form a brewing chamber, comprising a scraping mechanism, the scraping mechanism comprising: a scraping assembly rotatably mounted on the brewing cylinder; an elastic member sleeved on the scraping assembly, a first end abutting the scraping assembly, a second end abutting the brewing cylinder, and being used to reset the scraping assembly to an original point when the lower piston rises; a limiting member mounted on the frame and located below the scraping assembly; when the driving spindle drives the brewing cylinder to descend to an extreme position, the scraping assembly gradually descends until it abuts the limiting member, and the scraping assembly rotates along the brewing cylinder to scrape the residue.

[0009] In a further technical solution, the scraping assembly is provided with a guide block, and the brewing cylinder is provided with a guide groove; or the scraping assembly is provided with a guide groove, and the brewing cylinder is provided with a guide block; the guide block is slidably installed in the guide groove.

[0010] In a further technical solution, the scraping assembly includes a scraper and a rotating shaft, the scraper is connected to the top of the rotating shaft, the rotating shaft passes through the brewing cylinder, and the rotating shaft is provided with the guide block or guide groove.

[0011] In a further technical solution, the first end of the scraper is in an arc shape, and the second end of the scraper is connected to the first end of the rotating shaft.

[0012] In a further technical solution, the diameter of the first end of the scraper is greater than or equal to the inner diameter of the brewing cylinder.

[0013] In a further technical solution, the first end of the rotating shaft is connected to the second end of the scraper, the second end of the rotating shaft is provided with a fixing member, and the limiting member is provided with a limiting hole corresponding to the fixing member.

[0014] In a further technical solution, the elastic member is a spring, the spring is sleeved on the rotating shaft, the second end of the spring abuts against the brewing cylinder, and the second end of the spring abuts against the rotating shaft.

[0015] In a further technical solution, a connecting portion is provided on the outer side of the brewing cylinder, the connecting portion is provided with the guide groove, and the scraping assembly passes through the connecting portion through the guide groove.

[0016] In a further technical solution, the frame is provided with a mounting seat, and the mounting seat is arranged directly below the lower piston to limit the movement of the lower piston.

[0017] In a second aspect, the present invention further provides a coffee machine including a brewing device.

[0018] Compared with the existing technology, the present invention brings the following technical effects:

[0019] The brewing device of the utility model has a flat scraping mechanism. When the driving main shaft drives the brewing cylinder to descend, the scraping assembly rotates to clean the coffee grounds. When the driving main shaft drives the brewing cylinder to ascend, the scraping assembly returns to the original point under the drive of the elastic member. The utility model has a simple structure, strong practicality, and reduces production costs.

[0020] The coffee machine of the present invention includes all the technical features and beneficial effects of the brewing device, so they are not described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 It is a structural schematic diagram of the brewing device with a flat scraping mechanism of the present invention.

[0023] Figure 2 yes Figure 1Schematic diagram of the structure when the middle and lower pistons descend to their limit positions.

[0024] Figure 3 yes Figure 1 Schematic diagram of the structure when the middle brewing cylinder descends to the limit position.

[0025] Figure 4 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0026] Figure 5 yes Figure 3 Enlarged schematic diagram of point B in the middle.

[0027] Figure 6 This is an exploded diagram of the brewing cylinder, scraping assembly and elastic parts.

[0028] Description of main component symbols:

[0029] 1. Frame; 11. Mounting base;

[0030] 2. Drive the spindle;

[0031] 3. Upper piston;

[0032] 4. Brewing cylinder; 41. Connecting part;

[0033] 5. Lower piston; 51. Liquid separation seat;

[0034] 6. Brewing room;

[0035] 7. Scraping mechanism; 71. Scraping assembly; 711. Guide block; 712. Scraper; 713. Rotating shaft; 7131. Fixing member; 72. Elastic member; 73. Limiting member; 731. Limiting hole. DETAILED DESCRIPTION

[0036] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0038] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined.

[0039] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] Example 1

[0042] See Figure 1-6As shown, the brewing device with a planar scraping mechanism includes: a frame 1, a driving spindle 2, an upper piston 3, a brewing cylinder 4 and a lower piston 5, wherein the driving spindle 2 is rotatably mounted on the frame 1, the upper piston 3 is directly or indirectly fixed to the frame 1, the brewing cylinder 4 is mounted on the driving spindle 2, and the lower piston 5 is mounted in the brewing cylinder 4. Under the drive of the driving spindle 2, the upper piston 3 and the lower piston 5 close the brewing cylinder 4 to form a brewing chamber 6, including a scraping mechanism 7, which includes: a scraping assembly 71 , rotatably mounted on the brewing cylinder 4; an elastic member 72 is sleeved on the scraping assembly 71, with a first end abutting against the scraping assembly 71, and a second end abutting against the brewing cylinder 4, for resetting the scraping assembly 71 to its original point when the lower piston 5 rises; a limiting member 73 is mounted on the frame 1 and is located below the scraping assembly 71; when the driving spindle 2 drives the brewing cylinder 4 to descend to the limit position, the scraping assembly 71 gradually descends until it abuts against the limiting member 73, and the scraping assembly 71 rotates along the brewing cylinder 4 to scrape the residue. It should be noted that the liquid separation seat 51 and the filter screen on the top of the lower piston 5 of this embodiment are both flat, so they can accommodate more coffee powder. Compared with the prior art, in this embodiment, when the driving shaft 2 drives the brewing cylinder 4 to descend, the scraping assembly 71 rotates to clean the coffee grounds. When the driving shaft 2 drives the brewing cylinder 4 to rise, the scraping assembly 71 returns to the original point under the drive of the elastic member 72. The structure is simple, the practicability is strong, and the production cost is reduced.

[0043] In a further specific embodiment, the scraping assembly 71 is provided with a guide block 711, and the brewing cylinder 4 is provided with a guide groove; or the scraping assembly 71 is provided with a guide groove, and the brewing cylinder 4 is provided with a guide block 711; the guide block 711 is slidably mounted in the guide groove. As a preferred embodiment, the scraping assembly 71 of this embodiment is provided with a guide block 711, and the brewing cylinder 4 is provided with a guide groove. In other specific embodiments, the scraping assembly 71 can also be provided with a guide groove, and the brewing cylinder 4 can be provided with a guide block 711. It should be noted that the structure of a screw rod commonly used in other fields can be regarded as the guide block 711 of this embodiment, and the structure within the wire sleeve can be regarded as the guide groove. When the scraping assembly 71 abuts against the stopper 73, the brewing cylinder 4 continues to move downward. At this time, under the action of the guide groove and the guide block 711, the scraping assembly 71 will rotate along the guide groove through the guide block 711, thereby completing the scraping. It is understandable that the guide groove is an arc-shaped groove.

[0044] like Figure 4-6As shown in a further specific embodiment, the scraping assembly 71 includes a scraper 712 and a rotating shaft 713. The scraper 712 is connected to the top of the rotating shaft 713. The rotating shaft 713 passes through the brewing cylinder 4. The rotating shaft 713 is provided with the guide block 711 or guide groove. As a preferred embodiment, the rotating shaft 713 of this embodiment is provided with the guide block 711. The setting of the rotating shaft 713 allows the rotating shaft 713 to rotate along the brewing cylinder 4, thereby driving the scraper 712 to rotate above the brewing cylinder 4, cleaning the coffee grounds located on the lower piston 5.

[0045] like Figure 4-6 As shown, in a further specific embodiment, the first end of the scraper 712 is arc-shaped, and the diameter of the first end of the scraper 712 is greater than or equal to the inner diameter of the brewing cylinder 4. The second end of the scraper 712 is connected to the first end of the rotating shaft 713. As a preferred embodiment, the diameter of the first end of the scraper 712 in this embodiment is equal to the inner diameter of the brewing cylinder 4. It should be noted that if the diameter of the scraper 712 is too large, it will increase production costs and occupy a certain amount of space. If the diameter of the scraper 712 is too small, it will block the upper piston 3 from falling into the brewing chamber 6.

[0046] like Figure 4-5 As shown in a further specific embodiment, the first end of the rotating shaft 713 is connected to the second end of the scraper 712. The second end of the rotating shaft 713 is provided with a fixing member 7131. The limiting member 73 has a limiting hole 731 corresponding to the fixing member 7131. The fixing member 7131 is tapered. The frame 1 is provided with a mounting seat 11, which is disposed directly below the lower piston 5 and is used to limit the movement of the lower piston 5. It should be noted that when the lower piston 5 moves downward to the limit position, it is limited by the mounting seat 11. At the same time, when the lower piston 5 is at the limit position, the fixing member 7131 also abuts against the limiting member 73. When the brewing cylinder 4 continues to move downward, the top of the lower piston 5 gradually emerges from the top of the brewing cylinder 4. The relative height of the lower piston 5 and the scraper assembly 71 remains unchanged, and the rotating shaft 713 rotates under the cooperation of the guide block 711 and the guide groove, thereby driving the scraper 712 to rotate and clean the coffee grounds located on the top of the upper piston 3. The provision of the limiting hole 731 allows the fixing member 7131 to extend into the limiting member 73, which can better limit the rotating shaft 713 and enhance stability.

[0047] In a further specific embodiment, the elastic member 72 is a spring, which is sleeved on the rotating shaft 713. The second end of the spring abuts against the brewing cylinder 4. The second end of the spring abuts against the rotating shaft 713. When the rotating shaft 713 moves downward and rotates, the spring is compressed. When the driving main shaft 2 drives the brewing cylinder 4 and the lower piston 5 to move upward, the spring continuously expands, and the rotating shaft 713 and the scraper 712 return to their original positions under the drive of the spring. This has a simple structure and strong practicality.

[0048] In a further specific embodiment, a connecting portion 41 is provided on the outer side of the brewing cylinder 4 , the connecting portion 41 is provided with the guide groove, and the scraping assembly 71 passes through the connecting portion 41 through the guide groove.

[0049] In addition, it should be noted that the introduction mechanism for introducing coffee powder is hidden in the accompanying drawings. This structure is a prior art and will not be described in detail.

[0050] It should be noted that this embodiment can complete the parallel rotating scraping action only by setting the rotating shaft 713, the scraper 712, the spring and the limiter 73. Compared with the existing technology, it has a simple structure, reduces many parts and components, and reduces production costs.

[0051] Example 2

[0052] The coffee machine includes a brewing device. The coffee machine of this embodiment includes all the technical features and technical effects of the embodiment 1, and therefore will not be described in detail.

[0053] Descriptions such as "specific examples" or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are mutually inconsistent.

[0054] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limiting the present invention. Ordinary technicians in this field can change, modify, replace and modify the above embodiments. As long as they meet the purpose of the present invention, they should be within the scope of protection required by the present invention, such as: different combinations of specific embodiments, different combinations of distinguishing technical features.

Claims

1. A brewing device with a flat scraping mechanism, comprising: A frame (1), a driving spindle (2), an upper piston (3), a brewing cylinder (4) and a lower piston (5), wherein the driving spindle (2) is rotatably mounted on the frame (1), the upper piston (3) is directly or indirectly fixed to the frame (1), the brewing cylinder (4) is mounted on the driving spindle (2), and the lower piston (5) is mounted in the brewing cylinder (4). Under the drive of the driving spindle (2), the upper piston (3) and the lower piston (5) close the brewing cylinder (4) to form a brewing chamber (6), characterized in that: a scraping mechanism (7) is included, and the scraping mechanism (7) includes: A scraping assembly (71) is rotatably mounted on the brewing cylinder (4); An elastic member (72) is sleeved on the scraping assembly (71), with a first end abutting against the scraping assembly (71) and a second end abutting against the brewing cylinder (4), and is used to reset the scraping assembly (71) back to its original point when the lower piston (5) rises; A limiting member (73) is mounted on the frame (1) and is located below the scraping assembly (71); When the driving main shaft (2) drives the brewing cylinder (4) to descend to the limit position, the scraping assembly (71) gradually descends until it abuts against the limiting member (73), and the scraping assembly (71) rotates along the brewing cylinder (4) to scrape the residue.

2. The brewing device with a flat scraping mechanism according to claim 1, characterized in that: The scraping assembly (71) is provided with a guide block (711), and the brewing cylinder (4) is provided with a guide groove; or; The scraping assembly (71) is provided with a guide groove, and the brewing cylinder (4) is provided with a guide block (711); The guide block (711) is slidably mounted in the guide groove.

3. The brewing device with a flat scraping mechanism according to claim 2, characterized in that: The scraping assembly (71) comprises a scraper (712) and a rotating shaft (713), wherein the scraper (712) is connected to the top of the rotating shaft (713), the rotating shaft (713) passes through the brewing cylinder (4), and the rotating shaft (713) is provided with the guide block (711) or the guide groove.

4. The brewing device with a flat scraping mechanism according to claim 3, characterized in that: The first end of the scraper (712) is in an arc shape, and the second end of the scraper (712) is connected to the first end of the rotating shaft (713).

5. The brewing device with a flat scraping mechanism according to claim 4, characterized in that: The diameter of the first end of the scraper (712) is greater than or equal to the inner diameter of the brewing cylinder (4).

6. The brewing device with a flat scraping mechanism according to claim 3, characterized in that: The first end of the rotating shaft (713) is connected to the second end of the scraper (712), the second end of the rotating shaft (713) is provided with a fixing member (7131), and the limiting member (73) is provided with a limiting hole (731) corresponding to the fixing member (7131).

7. The brewing device with a flat scraping mechanism according to claim 3, characterized in that: The elastic member (72) is a spring, which is sleeved on the rotating shaft (713), and the second end of the spring abuts against the brewing cylinder (4). The second end of the spring abuts against the rotating shaft (713).

8. The brewing device with a flat scraping mechanism according to claim 2, characterized in that: A connecting portion (41) is provided on the outside of the brewing cylinder (4), the connecting portion (41) is provided with the guide groove, and the scraping assembly (71) passes through the connecting portion (41) through the guide groove.

9. The brewing device with a flat scraping mechanism according to claim 1, characterized in that: The frame (1) is provided with a mounting seat (11), and the mounting seat (11) is arranged directly below the lower piston (5) and is used to limit the movement of the lower piston (5).

10. A coffee machine, characterized in that: The invention comprises the brewing device according to any one of claims 1 to 9.

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