Hand pressing mechanism capable of saving labor in operation and hand pressing coffee machine

Abstract

The utility model discloses a hand pressing mechanism saving labor in operation and a hand pressing coffee maker, and belongs to the technical field of coffee makers, the hand pressing mechanism comprises a mounting shell, a gear assembly is arranged in the mounting shell, a gear comprises a driving gear set, a rack piston and a driving piece, the driving piece is connected with a handle used for pressing, and the handle is connected with the rack piston. The rack piston is in meshed connection with the driving gear set; the driving part comprises a third rotating shaft rotationally installed in the installation shell, a small gear connected with the driving gear set in a meshed mode is installed on the third rotating shaft, a rotating plate capable of rotating around the axis of the third rotating shaft is installed on the third rotating shaft, a meshing plate is installed on the rotating plate through a fourth rotating shaft, and a second torsional spring is further installed on the fourth rotating shaft. According to the hand-pressing mechanism capable of saving labor in operation and the hand-pressing part of the hand-pressing coffee machine, multi-stage gear transmission is adopted, so that force generated in the hand-pressing process of the hand-pressing coffee machine is reduced, and the extraction pressure is better controlled through the self-locking part and a more subdivided stroke.

Description

Technical Field

[0001] This utility model specifically relates to a labor-saving hand-pressing mechanism and a hand-pressed coffee machine, belonging to the field of coffee machine technology. Background Technology

[0002] In the coffee brewing industry, hand-operated coffee machines are favored by many coffee lovers due to their portability and unique operating experience. Currently, hand-operated coffee machines on the market mainly employ several methods to apply pressure for coffee extraction, including direct pressing, indirect pressing such as levers, single-stage gear rotation, and cams.

[0003] In this type of pressing method, the user needs to directly apply pressure to the water tank to complete the coffee extraction. This method is highly dependent on manual strength. Since coffee extraction requires a certain pressure standard, usually around 9-10 atmospheres, the user often needs to exert considerable force. Prolonged operation can easily lead to hand fatigue. Moreover, it is difficult to ensure that the magnitude and rate of force applied manually are completely consistent each time. This results in large fluctuations in the pressure on the water tank, ultimately affecting the stability of coffee extraction and leading to inconsistent coffee taste. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a labor-saving hand-pressing mechanism and a hand-pressed coffee machine, thereby reducing the force required during the hand-pressing process of the hand-pressed coffee machine, and achieving better control of extraction pressure through a self-locking mechanism and a more finely segmented stroke.

[0005] A labor-saving hand-operated pressure mechanism includes a mounting housing. A gear assembly is housed within the mounting housing. The gear assembly includes a drive gear set, a rack and pinion piston, and a drive component. The drive component is connected to a handle for pressing. ， The rack piston is meshed with the drive gear set;

[0006] The driving component includes a rotating shaft three rotatably mounted in the mounting housing, a small gear meshing with the driving gear set on the rotating shaft three, a rotating plate rotatable about its axis on the rotating shaft three, a meshing plate on the rotating plate via a rotating shaft four, and a second torsion spring on the rotating shaft four. In the initial state, the second torsion spring causes the meshing plate to rotate counterclockwise and press into the tooth groove of the small gear. The handle is connected to one end of the rotating shaft three and can rotate about the rotating shaft three as the axis. One end of the rotating shaft four is limited and inserted into the handle.

[0007] The mounting housing is also equipped with a limiting component to prevent the pinion from rotating during rotation.

[0008] Furthermore, a through hole is provided on the handle, and one end of the rotating shaft is inserted into the inside of the through hole. The outer diameter of the through hole is larger than the outer diameter of the rotating shaft.

[0009] Furthermore, the limiting component includes a second rotating shaft rotatably installed inside the mounting housing, a limiting plate mounted on the second rotating shaft, and a first torsion spring mounted on the second rotating shaft. In the initial state, the first torsion spring causes the limiting plate to rotate clockwise and press into the tooth groove of the pinion. A baffle is also installed inside the mounting housing, and the end of the first torsion spring away from the limiting plate is connected to the baffle.

[0010] Furthermore, the drive gear set includes a rotating shaft rotatably mounted inside the mounting housing, on which a medium gear and a large gear are mounted, and the large gear and the medium gear are coaxial.

[0011] Furthermore, the rack piston includes a copper sleeve installed on the top wall of the mounting housing, a toothed column slidably installed inside the copper sleeve, the toothed column meshing with a central gear, and a piston head connected to the bottom end of the toothed column extending downward.

[0012] Furthermore, the toothed column is provided with a plurality of serrated openings evenly distributed along its length direction, and the toothed column meshes with the intermediate gear through the serrated openings.

[0013] Furthermore, the mounting housing is also provided with bearing seats inside, the bearing seats are located at both ends of the first rotating shaft, and the first rotating shaft is connected to the inner wall of the mounting housing through the bearing seats.

[0014] A hand-operated coffee machine includes the aforementioned labor-saving hand-operated mechanism, and further includes: a bracket for supporting the hand-operated mechanism and a water tank for holding coffee. The bracket includes a base plate, a vertical plate, and a placement rack. The vertical plate is vertically mounted on the top surface of the base plate, the placement rack is mounted on the vertical plate, and the water tank is placed on the placement rack and directly opposite the piston head.

[0015] Beneficial effects:

[0016] 1. This utility model adopts a multi-stage gear transmission method in which a small gear drives a large gear, and a large gear drives a medium gear. By utilizing the gear ratio of different gears, speed reduction and torque increase are achieved, which greatly reduces the force required for the user to manually operate the handle. Compared with the traditional hand-operated coffee machine, which directly presses or simply rotates a single gear, the user can complete the coffee extraction process more easily, reducing hand fatigue. It is especially suitable for long-term or frequent use.

[0017] 2. In this invention, the limiting component effectively prevents the pinion from rotating back during operation, ensuring that the rack and pinion piston will not spring back due to the pinion's rotation when pressure is applied to the water tank, thus maintaining a stable pressure output. This makes the pressure during coffee extraction more stable, avoiding inconsistent coffee flavor caused by pressure fluctuations and improving the quality and stability of coffee extraction. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the left side of the hand-pressing mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the right side of the hand-pressing mechanism in this utility model;

[0021] Figure 4 for Figure 3 A schematic diagram of the structure with the mounting shell concealed.

[0022] Figure 5 for Figure 4 A schematic diagram of the rear view structure;

[0023] Figure 6 This is a schematic diagram of the limiting component and the driving component in the hand-operated mechanism.

[0024] In the diagram: 1. Bracket; 11. Base plate; 12. Vertical plate; 13. Placement rack; 2. Water tank; 3. Hand-operated mechanism; 31. Mounting shell; 32. Drive gear set; 321. Shaft 1; 322. Medium gear; 323. Large gear; 33. Rack and pinion piston; 331. Gear column; 332. Copper sleeve; 333. Piston head; 34. Limiting component; 341. Shaft 2; 342. Limiting plate; 343. Baffle; 344. First torsion spring; 35. Drive component; 351. Shaft 3; 352. Small gear; 353. Rotating plate; 354. Engaging plate; 355. Second torsion spring; 356. Shaft 4; 36. Handle. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figures 1-6As shown, a labor-saving hand-operated pressing mechanism includes a mounting housing 31, within which a gear assembly is provided. The gear assembly includes a drive gear set 32, a rack and pinion piston 33, and a drive member 35. The drive member 35 is connected to a handle 36 for pressing. ， The rack and pinion piston 33 is meshed with the drive gear set 32;

[0027] The drive unit 35 includes a rotating shaft 351 rotatably mounted in the mounting housing 31, a pinion 352 meshing with the drive gear set 32 ​​mounted on the rotating shaft 351, a rotating plate 353 rotatable about its axis mounted on the rotating shaft 351, a meshing plate 354 mounted on the rotating plate 353 via a rotating shaft 356, and a second torsion spring 355 mounted on the rotating shaft 356. In the initial state, the second torsion spring 355 causes the meshing plate 354 to rotate counterclockwise and press into the tooth groove of the pinion 352. The handle 36 is connected to one end of the rotating shaft 351 and can rotate about the rotating shaft 351 as the axis. One end of the rotating shaft 356 is limited and inserted into the handle 36.

[0028] The mounting housing 31 also has a limiting member 34 inside to prevent the pinion 352 from rotating during rotation.

[0029] Specifically, when the handle 36 is turned, the handle 36 rotates around the pivot 351. Since one end of the pivot 356 is inserted into the handle 36, it will drive the rotating plate 353 to rotate around the pivot 351. Under the action of the second torsion spring 355, the meshing plate 354 rotates counterclockwise and presses into the tooth groove of the pinion 352, thereby causing the pinion 352 to rotate. The pinion 352 meshes with the drive gear set 32, driving the drive gear set 32 ​​to rotate, which in turn causes the rack piston 33, which meshes with the drive gear set 32, to rotate. The mechanism slides vertically along the mounting housing 31, while the limiting member 34 is used to limit the rotation of the pinion 352 to ensure the stability of the transmission. Through the cooperation of gear transmission and structures such as torsion springs and meshing plates, the rotation of the handle 36 is converted into the linear motion of the rack and pinion piston 33, realizing the transmission and conversion of force. The transmission ratio of the gear set can save effort, and the limiting member 34 ensures that the mechanism will not rotate during operation, improving the stability and reliability of operation and avoiding the problem of pressure instability caused by the rotation of the pinion 352.

[0030] As a technical optimization of this utility model, a through hole is provided on the handle 36, and one end of the rotating shaft 356 is inserted into the inside of the through hole, and the outer diameter of the through hole is larger than the outer diameter of the rotating shaft 356.

[0031] Specifically, the outer diameter of the through hole on the handle 36 is larger than the outer diameter of the rotating shaft 356, allowing the rotating shaft 356 some room to move within the through hole. When the handle 36 rotates, the rotating shaft 356 can adaptively adjust its position within the through hole to ensure that the rotating plate 353 and the meshing plate 354 can smoothly drive the pinion 352 to rotate. This design increases the flexibility and fault tolerance of the mechanism. In actual operation, there may be certain installation errors or movement deviations between components. The fit between the through hole and the rotating shaft 356 can compensate for these errors, making the movement of the mechanism smoother and reducing jamming or damage caused by inaccurate component positioning.

[0032] As a technical optimization of this utility model, the limiting member 34 includes a second rotating shaft 341 rotatably installed inside the mounting shell 31, a limiting plate 342 installed on the second rotating shaft 341, and a first torsion spring 344 mounted on the second rotating shaft 341. In the initial state, the first torsion spring 344 causes the limiting plate 342 to rotate clockwise and press into the tooth groove of the pinion 352. A baffle 343 is also installed inside the mounting shell 31, and the end of the first torsion spring 344 away from the limiting plate 342 is connected to the baffle 343.

[0033] Specifically, in the initial state, the first torsion spring 344 causes the limiting plate 342 to rotate clockwise and press into the tooth groove of the pinion 352. When the pinion 352 tends to rotate clockwise, the limiting plate 342 will be stuck in the tooth groove to prevent it from rotating. When the pinion 352 needs to rotate clockwise, the external force overcomes the force of the first torsion spring 344 and causes the limiting plate 342 to disengage from the tooth groove of the pinion 352. The setting of the limiting member 34 effectively prevents the pinion 352 from rotating back during the rotation process, ensuring that when pressure is applied to the water tank, the rack piston 33 will not spring back due to the rotation of the pinion 352, thereby maintaining a stable pressure output and improving the stability and quality of coffee extraction.

[0034] As a technical optimization of this utility model, the drive gear set 32 ​​includes a rotating shaft 321 rotatably installed inside the mounting housing 31, and a medium gear 322 and a large gear 323 are installed on the rotating shaft 321, with the large gear 323 and the medium gear 322 being coaxial.

[0035] Specifically, when the pinion 352 rotates, the large gear 323, which meshes with the pinion 352, will rotate accordingly. Since the large gear 323 and the intermediate gear 322 are coaxially mounted on the rotating shaft 321, the intermediate gear 322 will also rotate synchronously. By employing the coaxial design of the large gear 323 and the intermediate gear 322 and appropriately selecting the number of teeth on the gears, different transmission ratios can be achieved. The pinion 352 drives the large gear 323 to rotate, and the large gear 323 then drives the intermediate gear 322. The speed reduction and torque increase effect of the large gear 323 can be utilized to make operation easier and reduce the force applied manually by the user.

[0036] As a technical optimization of this utility model, the rack piston 33 includes a copper sleeve 332 installed on the top wall of the mounting shell 31. A toothed column 331 is slidably installed inside the copper sleeve 332. The toothed column 331 is meshed with the middle gear 322. The bottom end of the toothed column 331 extending downward is connected to the piston head 333.

[0037] Specifically, when the middle gear 322 rotates, the gear 331 meshing with the middle gear 322 slides up and down inside the copper sleeve 332. When the gear 331 moves downward, it drives the piston head 333 to compress the hot water in the water tank downward. The copper sleeve 332 provides a stable sliding guide for the gear 331, ensuring the linearity and stability of the movement of the gear 331. The piston head 333 is connected to the gear 331, converting the linear movement of the gear 331 into pressure on the hot water in the water tank, thus realizing the pressure application required for coffee extraction.

[0038] As a technical optimization of this utility model, the tooth post 331 is provided with multiple serrated openings distributed along its length direction at equal intervals, and the tooth post 331 meshes with the intermediate gear 322 through the serrated openings.

[0039] Specifically, the serrated edges on the gear spur 331 mesh with the teeth of the intermediate gear 322. When the intermediate gear 322 rotates, the circular motion of the intermediate gear 322 is converted into the linear motion of the gear spur 331 through the cooperation of the teeth and the serrated edges. The equidistantly arranged serrated edges ensure stable meshing between the intermediate gear 322 and the gear spur 331, making the force transmission smoother and more accurate. This meshing method can effectively convert the rotation of the gear into linear motion, improve the transmission efficiency, and precisely control the movement distance of the gear spur 331, thereby better controlling the pressure on the water cylinder.

[0040] As a technical optimization of this utility model, a bearing seat is also provided inside the mounting shell 31. The bearing seat is located at both ends of the rotating shaft 321, and the rotating shaft 321 is connected to the inner wall of the mounting shell 31 through the bearing seat.

[0041] Specifically, the rotating shaft 321 is mounted on the inner wall of the mounting housing 31 via a bearing housing. The bearing housing provides support and positioning for the rotating shaft 321, allowing it to rotate smoothly within the mounting housing 31. The bearing housing reduces frictional resistance during rotation, improving transmission efficiency. Simultaneously, it ensures the stability and positional accuracy of the rotating shaft 321, enabling the large gear 323 and the intermediate gear 322 to accurately mesh with other gears, thus ensuring the normal operation of the entire transmission system.

[0042] Reference Figure 1A hand-operated coffee machine includes a labor-saving hand-operated mechanism, and further includes a support 1 for supporting the hand-operated mechanism 3 and a water tank 2 for holding coffee. The support 1 includes a base plate 11, a vertical plate 12 and a placement rack 13. The vertical plate 12 is vertically installed on the top surface of the base plate 11, the placement rack 13 is installed on the vertical plate 12, and the water tank 2 is placed on the placement rack 13 and is directly opposite the piston head 333.

[0043] Specifically, the base plate 11, upright plate 12, and placement rack 13 of the bracket 1 provide support and installation foundation for the hand-operated mechanism 3 and the water tank 2. The piston head 333 of the rack piston 33 of the hand-operated mechanism 3 faces the water tank 2. When the operating handle 36 moves the piston head 333 downward, pressure can be applied to the hot water in the water tank 2 to extract coffee. The overall structure is reasonably designed, and the bracket 1 stably supports the hand-operated mechanism 3 and the water tank 2, ensuring that the hand-operated mechanism 3 can accurately apply pressure to the water tank 2. This integrated design makes the hand-operated coffee machine compact, easy to operate, and easy to carry and use, meeting the needs of coffee lovers for portability and unique operating experience. At the same time, combined with the labor-saving and stable characteristics of the hand-operated mechanism in the preceding claims, the efficiency and quality of coffee extraction are improved.

[0044] Working principle: This hand-operated coffee machine mainly consists of a support 1, a water tank 2, and a labor-saving hand-operated pressing mechanism 3. Its working process involves manually operating the handle 36, which, through a series of gear transmissions and limiting structures, converts the rotation of the handle 36 into the linear motion of the rack and pinion piston 33. This, in turn, compresses the hot water in the water tank 2, completing the coffee extraction. The specific steps are as follows:

[0045] Operation and power transmission of handle 36: When the user turns handle 36, handle 36 rotates around shaft 351. Since one end of shaft 4 356 is inserted into handle 36, it will drive rotating plate 353 to rotate around shaft 351. Under the action of second torsion spring 355, engagement plate 354 rotates counterclockwise and presses into the tooth groove of pinion 352, causing pinion 352 to rotate.

[0046] Gear transmission and force amplification: The pinion 352 meshes with the large gear 323 in the drive gear set 32, driving the large gear 323 to rotate. Because the large gear 323 and the medium gear 322 are coaxially mounted on the rotating shaft 321, the medium gear 322 also rotates synchronously. Through the transmission method of the pinion 352 driving the large gear 323 and the large gear 323 driving the medium gear 322, the force amplification and speed reduction are achieved by utilizing the different gear ratios, thus achieving the purpose of saving effort.

[0047] The movement and pressure application of rack and pinion piston 33: When the middle gear 322 rotates, the toothed column 331 meshing with the middle gear 322 slides downward in the copper sleeve 332. The downward movement of the toothed column 331 drives the piston head 333 to compress the hot water in the water tank 2 downward. The hot water is squeezed through the coffee powder for extraction.

[0048] Limiting and stabilizing operation: During operation, the limiting component 34 plays a key role. In the initial state, the first torsion spring 344 causes the limiting plate 342 to rotate clockwise and press into the tooth groove of the pinion 352, preventing the pinion 352 from rotating clockwise. This ensures that when pressure is applied to the water cylinder 2, the rack piston 33 will not spring back, maintaining a stable pressure output. When the pinion 352 needs to rotate clockwise, the external force overcomes the force of the first torsion spring 344, causing the limiting plate 342 to disengage from the tooth groove of the pinion 352, thus enabling the reset operation.

[0049] Reset operation: When the handle 36 is pressed down to the end, it overcomes the restriction of the limit member 34, allowing the pinion 352 to rotate clockwise, thereby pulling the rack piston 33 up to reset and preparing for the next coffee extraction operation.

[0050] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0051] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A labor-saving hand-operated pressure mechanism, characterized in that: The device includes a mounting housing (31) containing a gear assembly, which includes a drive gear set (32), a rack piston (33), and a drive member (35). The drive member (35) is connected to a handle (36) for pressing. ， The rack piston (33) is meshed with the drive gear set (32); The drive unit (35) includes a rotating shaft three (351) rotatably mounted in the mounting housing (31), a small gear (352) meshing with the drive gear set (32) mounted on the rotating shaft three (351), a rotating plate (353) rotatable about its axis mounted on the rotating shaft three (351), a meshing plate (354) mounted on the rotating plate (353) via a rotating shaft four (356), and a second torsion spring (355) mounted on the rotating shaft four (356). In the initial state, the second torsion spring (355) causes the meshing plate (354) to rotate counterclockwise and press into the tooth groove of the small gear (352). The handle (36) is connected to one end of the rotating shaft three (351) and can rotate about the rotating shaft three (351) as the axis. One end of the rotating shaft four (356) is limited and inserted into the handle (36). The mounting housing (31) is also provided with a limiting member (34) for limiting the rotation of the pinion (352) during rotation.

2. The labor-saving hand-operated pressure mechanism as described in claim 1, characterized in that: A through hole is provided on the handle (36), and one end of the rotating shaft (356) is inserted into the inside of the through hole. The outer diameter of the through hole is larger than the outer diameter of the rotating shaft (356).

3. The labor-saving hand-operated pressure mechanism as described in claim 1, characterized in that: The limiting member (34) includes a second rotating shaft (341) rotatably installed inside the mounting shell (31). A limiting plate (342) is installed on the second rotating shaft (341). A first torsion spring (344) is mounted on the second rotating shaft (341). In the initial state, the first torsion spring (344) causes the limiting plate (342) to rotate clockwise and press into the tooth groove of the pinion (352). A baffle (343) is also installed inside the mounting shell (31). The end of the first torsion spring (344) away from the limiting plate (342) is connected to the baffle (343).

4. The labor-saving hand-operated pressure mechanism as described in claim 1, characterized in that: The drive gear set (32) includes a rotating shaft (321) rotatably mounted inside the mounting housing (31), on which a medium gear (322) and a large gear (323) are mounted, and the large gear (323) and the medium gear (322) are coaxial.

5. The labor-saving hand-operated pressure mechanism as described in claim 4, characterized in that: The rack piston (33) includes a copper sleeve (332) installed on the top wall of the mounting housing (31). A toothed column (331) is slidably installed inside the copper sleeve (332). The toothed column (331) meshes with the middle gear (322). The bottom end of the toothed column (331) extending downward is connected to the piston head (333).

6. The labor-saving hand-pressing mechanism as described in claim 5, characterized in that: The toothed column (331) is provided with a plurality of serrated openings distributed along its length direction at equal intervals, and the toothed column (331) meshes with the intermediate gear (322) through the serrated openings.

7. The labor-saving hand-pressing mechanism as described in claim 4, characterized in that: The mounting housing (31) is also provided with bearing seats inside. The bearing seats are located at both ends of the first rotating shaft (321). The first rotating shaft (321) is connected to the inner wall of the mounting housing (31) through the bearing seats.

8. A hand-operated coffee machine, characterized in that, The manual press mechanism, as described in any one of claims 1-7, further includes: a support (1) for supporting the manual press mechanism (3) and a water tank (2) for holding coffee. The support (1) includes a base plate (11), a vertical plate (12), and a placement rack (13). The vertical plate (12) is vertically mounted on the top surface of the base plate (11), the placement rack (13) is mounted on the vertical plate (12), and the water tank (2) is placed on the placement rack (13) and is directly opposite the piston head (333).

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