Coffee machine

Abstract

Disclosed is a coffee machine, comprising a machine base (1), a powder compartment unit (2), and a powder pushing unit (5). The powder compartment unit (2) comprises a powder compartment (21) and a first driving mechanism (22). The coffee machine is characterized in that the powder pushing unit (5) comprises: a push rod (52) extending in the axial direction of the powder compartment (21), a head portion thereof penetrating into the powder compartment (21) and being configured to reciprocate in the axial direction of the powder compartment (21); a push plate (53) located in the powder compartment (21) and mounted on the head portion of the push rod (52); a sliding block (54) rotatably mounted on a tail portion of the push rod (52); and a sliding opening seat (51) fixed relative to the machine base (1) and provided with a sliding opening (511) for limiting sliding of the sliding block (54) therein. Compared with the existing technology, the coffee machine of the present invention can achieve a powder pushing function without additionally introducing a new drive source, and the powder pushing unit has a simple structure.

Description

A coffee machine Technical Field

[0001] This invention relates to the field of beverage brewing equipment technology, specifically to a coffee machine. Background Technology

[0002] As the technology of home appliances and coffee machines becomes more and more advanced, coffee machines can not only automatically perform operations such as grinding, loading, tamping, brewing, and removing residue, realizing the automated control of the entire coffee brewing process and simplifying user operation, but also the taste of the brewed coffee is getting better and better.

[0003] For example, Chinese patent application number CN201910115400.X, entitled "A brewing base assembly and a coffee machine having the brewing base assembly", discloses a coffee machine. When working, the brewing cup containing coffee powder is first placed into the brewing cup holder located in the initial position. Then, the driving device drives the brewing cup holder to swing to the position facing the brewing plug. Next, the brewing plug is pressed down into the brewing cup to brew the coffee. After brewing, the brewing plug returns to its original position, the push plate inside the brewing cup moves upward to push out the residue, and finally the driving device drives the brewing cup holder to swing back to the initial position.

[0004] However, in the above scheme, a transmission device is set on the push plate to push the push plate up and down along the brewing cup. The drive device can drive this transmission device to drive the push plate up and down. This requires the introduction of a new drive source and the structure of the powder pushing unit is complicated. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a coffee machine that can realize the powder pushing function without the introduction of an additional driving source and has a simple powder pushing unit structure, in view of the current state of the prior art.

[0006] The technical solution adopted by the present invention to solve the above-mentioned technical problem is as follows: a coffee machine, comprising a base and a powder container unit and a powder pushing unit mounted on the base, wherein the powder container unit includes a powder container with an opening at the top and a first driving mechanism for driving the powder container to swing, wherein the powder container has at least an extraction position and a powder dispensing position during the swinging process, characterized in that: the powder pushing unit includes...

[0007] A push rod extends axially along the powder hopper and its head penetrates into the powder hopper, and is configured to reciprocate axially along the powder hopper.

[0008] A push plate, located inside the powder hopper, is installed at the head of the push rod;

[0009] A slider is rotatably mounted at the tail of the push rod; and

[0010] A slide block, fixed relative to the machine base, is provided with a slide groove for limiting the sliding movement of the slider therein. The slide groove includes a second sliding section having a first end and a second end. When the powder hopper is in the extraction position, the slider is located at the first end of the second sliding section, and when the powder hopper is in the powder removal position, the slider is located at the second end of the second sliding section. Furthermore, it is configured such that:

[0011] During the process of the powder container swinging from the extraction position to the powder removal position, the slider slides from the first end to the second end of the second sliding section, thereby driving the push rod to move along the axial direction of the powder container toward the opening, so that the powder cake gradually detaches from the powder container.

[0012] In order to drive the push rod to move during the sliding of the slider in the second sliding section, the second sliding section gradually approaches the rotation axis of the powder hopper from the first end to the second end.

[0013] To facilitate smooth slider movement, the second sliding segment is curved. Alternatively, the second sliding segment could be straight, but this would result in less smooth slider movement.

[0014] To ensure that the pusher plate remains stationary as it swings from the powder receiving position to the extraction position in the powder hopper, the powder hopper also has a powder receiving position during the swinging process, and the extraction position is located between the powder receiving position and the powder removal position.

[0015] The chute further includes a first sliding section having a first end and a second end, the first end of the second sliding section being connected to the second end of the first sliding section; and when the powder hopper is in the powder receiving position, the slider is located at the first end of the first sliding section, and when the powder hopper is in the extraction position, the slider is located at the second end of the first sliding section; and is further configured as follows:

[0016] During the process of the powder hopper swinging from the powder receiving position to the extraction position, the slider slides from the first end of the first sliding section to the second end, and the pusher plate remains stationary relative to the powder hopper.

[0017] In order to keep the push rod stationary during the sliding of the slider in the first sliding section, the first sliding section is arc-shaped, and the center of the first sliding section coincides with the rotation axis of the powder hopper.

[0018] In order to distribute the force exerted by the slider on the push rod and prevent it from breaking, the bottom of the powder hopper has a fixed cylinder through which the push rod passes, and the tail of the push rod has a movable cylinder that is fitted into the fixed cylinder. The slider is rotatably mounted on the outer peripheral wall of the movable cylinder.

[0019] To prevent the slider from contacting the inner wall of the chute near the powder hopper during the powder hopper's swing, thus affecting the smoothness of the powder hopper's swing, the powder pushing unit also includes an elastic element. This elastic element acts between the fixed cylinder and the movable cylinder, so that the slider always tends to abut against the inner wall of the chute away from the powder hopper.

[0020] To achieve automated powder pressing and extraction, an extraction unit is installed on the machine base. This extraction unit includes...

[0021] The piston assembly is positioned directly opposite the opening of the powder chamber at the extraction location; and

[0022] The second drive mechanism is used to drive the piston assembly to translate along its axial direction between the relief position and the powder pressing position;

[0023] In the extraction state, the powder hopper is in the extraction position, the piston assembly is in the powder pressing position, and an extraction chamber is formed between the powder hopper and the piston assembly. The piston assembly and the push rod are both sealed to the powder hopper.

[0024] In order to provide the push rod with a certain amount of movement space when the piston assembly retracts to facilitate pressure relief, the slide groove has a notch on the inner side wall of the first end of the second sliding section near the powder hopper.

[0025] When the piston assembly is just out of the extraction state, the piston assembly is always sealed with the powder hopper so that the push rod moves along the axial direction of the powder hopper toward the opening under negative pressure, thereby releasing the seal between the push rod and the powder hopper, and driving the slider from the first end of the second sliding section to the notch.

[0026] To ensure precise alternating intermittent movement of the powder hopper and piston assembly, the first and second drive mechanisms are the same drive mechanism, which includes:

[0027] The toothed disc has incomplete teeth on its outer peripheral wall;

[0028] A sector gear is connected to the side of the powder hopper and can mesh with the incomplete gear.

[0029] The connecting rod has its first end hinged to the base and its second end having an arc-shaped limiting groove.

[0030] The crank has a first end hinged to the center of the gear plate and a second end having a rotating wheel that can be slidably inserted into the limiting groove. The distance from the first end to the second end of the crank is the same as the radius of the limiting groove.

[0031] A transmission assembly, acting between the first end of the connecting rod and the piston assembly, is used to convert the rotational motion of the connecting rod into the translational motion of the piston assembly; and

[0032] A drive structure for driving the gear disc to rotate about its own axis;

[0033] When the sector gear is in partial engagement with the teeth, the center of the limiting groove coincides with the rotation axis of the gear disk.

[0034] When the center of the limiting groove is offset from the rotation axis of the gear disk, the sector gear and the incomplete gear do not mesh.

[0035] To facilitate automatic powder removal, the angle between the central axis of the powder hopper in the powder removal position and the horizontal plane is 0~10°.

[0036] Compared with the prior art, the advantages of the present invention are as follows: the powder pushing unit is composed of a chute seat with a chute, a push rod, a push rod and a slider. During the process of the powder hopper swinging from the extraction position to the powder removal position, the slider slides from the first end to the second end of the second sliding section of the chute, and drives the push plate to move along the axial direction of the powder hopper toward the opening through the push rod, so that the powder cake gradually leaves the powder hopper. The powder pushing function can be realized without the introduction of an additional driving source and the structure of the powder pushing unit is simple. Attached Figure Description

[0037] Figure 1 is a front view of Embodiment 1 of the coffee machine of the present invention in the powder receiving state (the support plate located on the front side is omitted).

[0038] Figure 2 is an enlarged view of the extraction unit in Figure 1;

[0039] Figure 3 is a longitudinal sectional view of Embodiment 1 of the coffee machine of the present invention in the powder receiving state;

[0040] Figure 4 is a longitudinal sectional view of Embodiment 1 of the coffee machine of the present invention in the extraction preparation state;

[0041] Figure 5 is a rear view of Embodiment 1 of the coffee machine of the present invention in the pre-pressed state;

[0042] Figure 6 is a longitudinal sectional view of Embodiment 1 of the coffee machine of the present invention in the pre-pressed state;

[0043] Figure 7 is a longitudinal sectional view of Embodiment 1 of the coffee machine of the present invention in the extraction state;

[0044] Figure 8 is a longitudinal sectional view of Embodiment 1 of the coffee machine of the present invention in a depressurized state;

[0045] Figure 9 is a longitudinal sectional view of Embodiment 1 of the coffee machine of the present invention in the powder removal state;

[0046] Figure 10 is a front view of the drive mechanism in Embodiment 2 of the coffee machine of the present invention; Figure 11 is a rear view of the drive mechanism in Embodiment 2 of the coffee machine of the present invention.

[0047] Figure 12 is a front view of the extraction unit in Embodiment 2 of the coffee machine of the present invention;

[0048] Figure 13 is a partial cross-sectional view (viewed from back to front) of Embodiment 2 of the coffee machine of the present invention in the powder receiving state.

[0049] Figure 14 is a partial cross-sectional view (viewed from back to front) of Embodiment 2 of the coffee machine of the present invention in the extraction preparation state.

[0050] Figure 15 is a partial cross-sectional view (viewed from back to front) of Embodiment 2 of the coffee machine of the present invention in the pre-pressed state.

[0051] Figure 16 is a partial cross-sectional view (viewed from back to front) of Embodiment 2 of the coffee machine of the present invention in the powder removal preparation state.

[0052] Figure 17 is a partial cross-sectional view (viewed from back to front) of Embodiment 2 of the coffee machine of the present invention in the de-powdering state. Detailed Implementation

[0053] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0054] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity. Example

[0055] Figures 1 to 9 show a first preferred embodiment of the coffee machine of the present invention. The coffee machine includes a base 1 and a powder container unit 2, a powder feeding unit 3, an extraction unit 4, and a powder pushing unit 5 mounted on the base 1.

[0056] The base 1 includes two support plates 11 arranged side by side, one in front of the other and connected to each other.

[0057] The powder hopper unit 2 includes a powder hopper 21 and a first drive mechanism 22.

[0058] Specifically, the front and rear sides of the powder hopper 21 are rotatably connected to the corresponding support plates 11 via a rotating shaft extending in the front-rear direction; the top of the powder hopper 21 has an opening 211; the bottom of the powder hopper 21 has a fixed cylinder 212 arranged coaxially with the powder hopper 21, and a sealing ring 213 is installed on the inner shoulder of the upper part of the fixed cylinder 212; a water inlet connector 214 is connected to the eccentric position at the bottom of the powder hopper 21.

[0059] The first drive mechanism 22 is used to drive the powder hopper 21 to swing back and forth between the powder receiving position, the extraction position and the powder removal position. The extraction position is located between the powder receiving position and the powder removal position. In this embodiment, the first drive mechanism 22 is a worm gear reducer, which is a conventional structure and will not be described in detail here.

[0060] The powder feeding unit 3 is used to supply coffee powder to the powder hopper 21 in the powder receiving position, and includes a grinding device 31 and a powder outlet tube 32.

[0061] Specifically, the coffee grinding device 31 is used to grind coffee beans into coffee powder, and has a bean inlet and a powder outlet at the top and bottom, respectively.

[0062] The top inlet of the powder outlet tube 32 connects to the aforementioned powder outlet, and the bottom outlet of the powder outlet tube 32 faces the opening 211 of the powder hopper 21 in the powder receiving position. The extraction unit 4 is used to compress the coffee powder in the powder hopper 21 in the extraction position into a cake and extract it, and includes a piston assembly 41 and a second drive mechanism 42.

[0063] Specifically, the piston assembly 41 is directly opposite the opening 211 of the powder chamber 21 located at the extraction position, is coaxially arranged with the powder chamber 21, and can be slidably installed between the two support plates 11 along the axial direction of the powder chamber 21; in this embodiment, the piston assembly 41 includes a water outlet seat 411, a piston 412 movably installed in the water outlet seat 411, and a return spring 413 connected between the water outlet seat 411 and the piston 412;

[0064] The second drive mechanism 42 is used to drive the water outlet seat 411 of the piston assembly 41 to translate along its axial direction between the relief position and the powder pressing position. In this embodiment, the second drive mechanism 42 is a two-link drive structure, which is a conventional structure and will not be described in detail here.

[0065] The powder pushing unit 5 is used to push the powder cake in the powder container 21 located at the extraction position away from the powder container 21, and includes a slide seat 51, a push rod 52, a push plate 53, a slider 54 and an elastic element 55.

[0066] Specifically, the slide seat 51 is plate-shaped, and there are two of them, arranged side by side one in front of the other and fixed relative to the machine base 1. The surface of each slide seat 51 is provided with a slide groove 511. The slide groove 511 includes a first sliding section 5111 having a first end (i.e., bottom end) and a second end (i.e., top end) and a second sliding section 5112 having a first end (i.e., bottom end) and a second end (i.e., top end). The bottom end of the second sliding section 5112 is connected to the top end of the first sliding section 5111. The first sliding section 5111 extends circumferentially along the rotation axis of the powder hopper 21 and is arc-shaped, with its center coinciding with the rotation axis of the powder hopper 21. The second sliding section 5112 is arc-shaped and gradually approaches the rotation axis of the powder hopper 21 from the bottom to the top. The chute 511 has a notch 5113 on the inner wall of the side near the powder hopper 21 at the connection between the first sliding section 5111 and the second sliding section 5112. In this embodiment, the chute seat 51 and the support plate 11 of the machine base 1 are integral parts.

[0067] The push rod 52 extends axially along the powder hopper 21 and its head penetrates into the powder hopper 21, and can be movably inserted into the fixed cylinder 212 along its axial direction; the tail of the push rod 52 has a movable cylinder 521 arranged coaxially with the fixed cylinder 212, and the movable cylinder 521 can be movably sleeved on the outer periphery of the fixed cylinder 212 along its axial direction; the head of the push rod 52 has an enlarged diameter section and a constant diameter section arranged sequentially from bottom to top;

[0068] The push plate 53 is installed at the head of the push rod 52 and is located inside the powder hopper 21;

[0069] There are two sliders 54, which correspond one-to-one with the slide seat 51. They are rotatably installed on the front and rear sides of the outer peripheral wall of the movable cylinder 521, and can be slidably inserted into the slide groove 511 of the corresponding slide seat 51.

[0070] The elastic element 55 is a compression spring, with its two ends abutting against the inner shoulder of the lower part of the fixed cylinder 212 and the limiting block inside the movable cylinder 521, so that the slider 54 always tends to abut against the inner side wall of the slide groove 511 on the side away from the powder hopper 21.

[0071] When the powder hopper 21 is in the powder receiving position, the slider 54 is located at the bottom end of the first sliding section 5111. When the powder hopper 21 is in the extraction position, the slider 54 is located at the top end of the first sliding section 5111 and at the bottom end of the second sliding section 5112. When the powder hopper 21 is in the powder detachment position, the slider 54 is located at the top end of the second sliding section 5112.

[0072] During the process of the powder hopper 21 swinging from the powder receiving position to the extraction position, the slider 54 slides from the bottom end to the top end of the first sliding section 5111 so that the push plate 53 remains stationary relative to the powder hopper 21.

[0073] As the powder container 21 swings from the extraction position to the powder removal position, the slider 54 slides from the bottom end to the top end of the second sliding section 5112, and drives the push plate 53 to move along the axial direction of the powder container 21 toward the opening 211 via the push rod 52, thereby causing the powder cake to gradually detach from the powder container 21.

[0074] It should be noted that, in the extraction state, as shown in Figure 7, the powder hopper 21 is in the extraction position, the piston assembly 41 is in the powder pressing position, and an extraction chamber is formed between the powder hopper 21 and the piston assembly 41. The piston assembly 41 and the powder hopper 21 are radially sealed by a sealing ring (not shown in the figure), and the equal-diameter section of the push rod 52 is radially sealed to the fixed cylinder 212 by a sealing ring 213. When the piston assembly 41 just leaves the extraction state, the piston assembly 41 is always sealed and engaged with the powder hopper 21, so that the push rod 52 is under negative pressure. The lower edge of the powder hopper 21 moves axially toward the opening 211, thereby causing the equal-diameter section of the push rod 52 to disengage from the sealing ring 213 and release the sealing fit with the powder hopper 21. This also drives the slider 54 from the connection between the first sliding section 5111 and the second sliding section 5112 to the notch 5113. It can be seen that the notch 5113 provides a certain amount of movement space for the push rod 52 when the piston assembly 41 retracts. Without the notch 5113, the push rod 52 would remain fixed when not rotating, which would not be conducive to timely exhaust and release of vacuum.

[0075] In addition, as shown in Figure 3, the opening 211 of the powder hopper 21 in the powder receiving position faces directly upward, which facilitates powder receiving; as shown in Figure 9, the opening 211 of the powder hopper 21 in the powder receiving position faces directly to the left, that is, the angle between its central axis and the horizontal plane is 0°, which facilitates powder removal.

[0076] The working principle of this embodiment is as follows: When the coffee machine is working...

[0077] (1) Collecting pollen:

[0078] In the initial state, as shown in Figure 3, the powder hopper 21 is in the powder receiving position, the piston assembly 41 is in the yielding position, the coffee machine is in the powder receiving state, and the grinding device 31 grinds the coffee beans into coffee powder and then sends the coffee powder into the powder hopper 21 through the powder outlet pipe 32.

[0079] (2) Extraction:

[0080] After the powder is dispensed, the first drive mechanism 22 drives the powder container 21 to swing to the extraction position. During this process, the piston assembly 41 is always in the yielding position to avoid interfering with the movement of the powder container 21. At the same time, the slider 54 slides from the bottom end to the top end of the first sliding section 5111 so that the push plate 53 remains stationary relative to the powder container 21. At this time, as shown in Figure 4, the coffee machine switches to the extraction preparation state.

[0081] Next, the second drive mechanism 42 drives the water outlet seat 411 of the piston assembly 41 to move downward along its axis until the piston 412 of the piston assembly 41 extends into the powder compartment 21 and pre-presses on top of the coffee powder. At this time, as shown in Figure 6, the piston assembly 41 is in the tamping position and the coffee machine switches to the pre-pressing state.

[0082] Then, water is injected into the water outlet 411 by the water pump so that the piston 412 compresses the coffee powder into a powder cake. At this time, as shown in Figure 7, the piston 412 of the piston assembly 41 is radially sealed with the powder container 21 by the sealing ring, and the equal diameter section of the push rod 52 is radially sealed with the fixed cylinder 212 by the sealing ring 213. The coffee machine switches to the extraction state, and hot water can be injected into the extraction chamber through the water inlet connector 214 of the powder container 21 to achieve extraction. The coffee liquid is finally discharged from the water outlet 411 of the piston assembly 41.

[0083] After extraction, the water pump stops injecting water, and the piston 412 returns to its original position under the elastic force of the return spring 413, so that the piston assembly 41 is disengaged from the extraction state. During this process, the piston 412 of the piston assembly 41 is always sealed with the powder container 21, so that the push rod 52 moves along the axial direction of the powder container 21 toward the opening 211 under the action of negative pressure, thereby causing the equal diameter section of the push rod 52 to disengage from the sealing ring 213 and release the sealing engagement with the powder container 21, and drive the slider 54 from the connection between the first sliding section 5111 and the second sliding section 5112 to the notch 5113. Thus, as shown in Figure 8, the coffee machine switches to the depressurization state, and the outside atmosphere can enter the extraction chamber through the gap between the push rod 52 and the fixed cylinder 212 of the powder container 21, releasing the vacuum. Then, the second drive mechanism 42 drives the water inlet seat 411 of the piston assembly 41 to move upward along its axial direction until it returns to the release position. At the same time, the push rod 52 is reset under the action of the elastic element 55, so that the slider 54 exits the notch 5113.

[0084] (4) De-powdering:

[0085] Next, the first drive mechanism 22 drives the powder container 21 to swing to the powder removal position. During this process, the piston assembly 41 is always in the yielding position to avoid interfering with the movement of the powder container 21. At the same time, the slider 54 slides from the bottom end to the top end of the second sliding section 5112 and drives the push plate 53 to move along the axial direction of the powder container 21 toward the opening 211 through the push rod 52, thereby causing the powder cake to gradually detach from the powder container 21. At this time, as shown in Figure 9, the coffee machine switches to the powder removal state, and the powder cake detached from the powder container 21 falls off under the action of gravity.

[0086] (5) Reset:

[0087] Finally, the first drive mechanism 22 drives the powder chamber 21 to reset to the powder receiving position.

[0088] In this embodiment, the powder hopper 21 and the piston assembly 41 are controlled and driven by the first drive mechanism 22 and the second drive mechanism 42 respectively, and their actions are independent and simple to control. Example

[0089] Figures 10 to 17 show a second preferred embodiment of the coffee machine of the present invention. The difference from Embodiment 1 is that:

[0090] In this embodiment, the first drive mechanism 22 and the second drive mechanism 42 are the same drive mechanism, which includes a gear 61, a sector gear 62, a connecting rod 63, a crank 64, a transmission assembly 65, and a drive structure 66.

[0091] Among them, the outer peripheral wall of the toothed disk 61 has incomplete teeth 611 and complete teeth 612 arranged side by side.

[0092] The sector gear 62 is coaxially connected to the rotating shaft connected to the powder hopper 21 and can mesh with the incomplete gear 611;

[0093] The first end of the connecting rod 63 is hinged to the support plate 11 of the base 1, and the second end has a limiting groove 631 that is semi-circular.

[0094] The first end of the crank 64 is hinged to the center of the gear plate 61, and the second end has a rotating wheel 641 that can be slidably inserted into the limiting groove 631. The distance from the first end to the second end of the crank 64 is the same as the radius of the limiting groove 631.

[0095] The transmission assembly 65 acts between the first end of the connecting rod 63 and the piston assembly 41 to convert the rotational motion of the connecting rod 63 into the translational motion of the piston assembly 41. In this embodiment, the transmission assembly 65 is a two-bar structure, including two connecting rods 651 that are hinged to each other. The end of one connecting rod 651 is connected to the first end of the connecting rod 63, and the end of the other connecting rod 651 is hinged to the top of the piston assembly 41.

[0096] The drive structure 66 is used to drive the gear disk 61 to rotate around its own axis. In this embodiment, the drive structure 66 is a worm gear reducer, including a motor 661, a worm 662 coaxially connected to the output shaft of the motor 661, a turbine 663 meshing with the worm 662, and a transmission gear 664 coaxially connected to the turbine 663 and meshing with the fully toothed 612. When the sector gear 62 is meshing with the partially toothed 611, the center of the limiting groove 631 coincides with the rotation axis of the gear disk 61. At this time, the drive mechanism 66 drives the gear disk 61 to rotate. On the one hand, since the sector gear 62 is meshing with the partially toothed 611, the sector gear 62 drives the powder bin 21 to swing. On the other hand, since the center of the limiting groove 631 coincides with the rotation axis of the gear disk 61, the rotating wheel 641 that rotates with the crank 64 slides around its center in the limiting groove 631 and will not drive the connecting rod 63 to rotate. Therefore, the piston assembly 41 remains stationary.

[0097] When the center of the limiting groove 631 is off from the rotation axis of the gear disk 61, the sector gear 62 and the incomplete tooth 611 do not mesh. At this time, the drive mechanism 66 drives the gear disk 61 to rotate. On the one hand, since the center of the limiting groove 631 is off from the rotation axis of the gear disk 61, the rotating wheel 641, which rotates with the crank 64, slides off its center in the limiting groove 631, thereby driving the connecting rod 63 to rotate. Finally, under the action of the transmission component 65, the piston assembly 41 is driven to translate. On the other hand, since the sector gear 62 and the incomplete tooth 611 do not mesh, the sector gear 62 will not be driven to rotate, so the powder hopper 21 remains stationary.

[0098] It can be seen that the circular motion of the gear plate 61 is converted into the intermittent reciprocating motion of the connecting rod 63 within a certain angle range. For half the time, it is stationary when the radius is equal, and the gauge and powder bin 21 alternate intermittent motion.

[0099] The working principle of this embodiment is as follows:

[0100] (1) Collecting pollen:

[0101] In the initial state, as shown in Figure 13, the powder hopper 21 is in the powder receiving position, the piston assembly 41 is in the yielding position, and the coffee machine is in the powder receiving state.

[0102] (2) Extraction:

[0103] After the powder is dispensed, the transmission gear 664 of the drive structure 66 rotates clockwise, causing the gear plate 61 to rotate counterclockwise by 45 degrees. During this process, on the one hand, the crank 64 rotates synchronously with the gear plate 61 by 45 degrees, but the rotation trajectory of the rotating wheel 641 coincides with the limiting groove 631 of the connecting rod 63, so it cannot drive the connecting rod 63 to rotate, and the piston assembly 41 remains stationary. On the other hand, the sector tooth 62 meshes with the incomplete tooth 611 of the gear plate 61, causing the entire powder container 21 to rotate clockwise by 45 degrees. At this time, as shown in Figure 14, the powder container 21 is in the extraction position, the piston assembly 41 is still in the yielding position, and the coffee machine switches to the extraction preparation state.

[0104] Next, the transmission gear 664 of the drive structure 66 continues to rotate clockwise, driving the gear plate 61 to rotate counterclockwise. During this process, on the one hand, the crank 64 rotates synchronously with the gear plate 61, and the rotating wheel 641 of the crank 64 always moves within the limiting groove 631 of the connecting rod 64, so that the connecting rod 63 rotates clockwise to the maximum angle and the piston assembly 41 moves forward to the farthest position. On the other hand, the sector tooth 62 disengages from the incomplete tooth 611 of the gear plate 61, and the powder container 21 remains stationary. At this time, as shown in Figure 15, the powder container 21 is still in the extraction position, the piston assembly 41 is in the tamping position, and the coffee machine switches to the pre-compression state.

[0105] Then the motor 661 stops driving, the water pump starts to inject water, the piston 612 continues to compress the coffee powder, and the coffee machine switches to the extraction state.

[0106] After extraction is completed and pressure is released, the transmission gear 664 of the drive structure 66 continues to rotate clockwise, driving the gear plate 61 to rotate counterclockwise. During this process, on the one hand, the crank 64 rotates synchronously with the gear plate 61, and the rotating wheel 641 of the crank 64 always moves within the limiting groove 631 of the connecting rod 64, causing the connecting rod 63 to move counterclockwise in the opposite direction, and the piston assembly 41 retracts to the maximum limit. On the other hand, the sector tooth 62 and the incomplete tooth 611 of the gear plate 61 are always disengaged, and the powder container 21 remains stationary. At this time, as shown in Figure 16, the powder container 21 is still in the extraction position, the piston assembly 41 is in the yielding position, and the coffee machine switches to the powder removal preparation state.

[0107] (4) De-powdering:

[0108] Next, the transmission gear 664 of the drive structure 66 continues to rotate clockwise, causing the gear plate 61 to rotate counterclockwise by 45 degrees. During this process, on the one hand, the crank 64 rotates synchronously with the gear plate 61 by 45 degrees, but the rotation trajectory of the rotating wheel 641 coincides with the limiting groove 631 of the connecting rod 63, so the connecting rod 63 cannot rotate and the piston assembly 41 remains stationary. On the other hand, the sector tooth 62 re-meshes with the incomplete tooth 611 of the gear plate 61, causing the entire powder container 21 to rotate clockwise by 45 degrees. At this time, as shown in Figure 17, the coffee machine switches to the powder removal state.

[0109] (5) Reset:

[0110] Then the transmission gear 664 of the drive structure 66 rotates counterclockwise, causing the gear disk 61 to rotate 45 degrees clockwise. The sector tooth 62 meshes with the incomplete tooth 611 of the gear disk 61, causing the entire powder hopper 21 to rotate 45 degrees counterclockwise. At this time, the gear disk 61 returns to the position shown in Figure 16, and the sector tooth 62 disengages from the incomplete tooth 611 of the gear disk 61.

[0111] Then the toothed disc 61 continues to rotate clockwise, and after about one revolution, it returns to the position shown in Figure 14, and the sector tooth 62 re-meshes with the incomplete tooth 611 of the toothed disc 61;

[0112] Finally, the toothed disc 61 continues to rotate 45 degrees clockwise, and the fan-shaped tooth 62 meshes with the incomplete tooth 611 of the toothed disc 61, causing the entire powder chamber 21 to rotate 45 degrees counterclockwise back to the initial position shown in Figure 13.

[0113] In this embodiment, the powder hopper 21 and the piston assembly 41 are controlled and driven by the same drive mechanism, with their actions linked and controlled precisely.

Claims

1. A coffee machine, comprising a base (1) and a powder container unit (2) and a powder dispensing unit (5) mounted on the base (1), wherein the powder container unit (2) includes a powder container (21) having an opening (211) at the top and a first drive mechanism (22) for driving the powder container (21) to oscillate, wherein the powder container (21) has at least an extraction position and a powder dispensing position during oscillation, characterized in that: The powder pushing unit (5) includes: A push rod (52) extends along the axial direction of the powder hopper (21) and its head penetrates into the powder hopper (21), and is configured to reciprocate along the axial direction of the powder hopper (21). The push plate (53) is located inside the powder hopper (21) and is installed at the head of the push rod (52); A slider (54) is rotatably mounted at the tail of the push rod (52); and A slide block (51), fixed relative to the base (1), is provided with a slide groove (511) for restricting the sliding of the slider (54) therein. The slide groove (511) includes a second sliding section (5112) having a first end and a second end. When the powder hopper (21) is in the extraction position, the slider (54) is located at the first end of the second sliding section (5112), and when the powder hopper (21) is in the de-powdering position, the slider (54) is located at the second end of the second sliding section (5112). Furthermore, it is configured such that: During the process of the powder container (21) swinging from the extraction position to the powder removal position, the slider (54) slides from the first end to the second end of the second sliding section (5112), thereby driving the push rod (52) to move along the axial direction of the powder container (21) toward the opening (211) with the push plate (53), so that the powder cake gradually detaches from the powder container (21).

2. The coffee machine according to claim 1, characterized in that: The second sliding section (5112) gradually approaches the rotation axis of the powder hopper (21) from the first end to the second end.

3. The coffee machine according to claim 2, characterized in that: The second sliding segment (5112) is arc-shaped.

4. The coffee machine according to claim 1, characterized in that: The powder hopper (21) also has a powder receiving position during the oscillation process, and the extraction position is located between the powder receiving position and the powder removal position; The chute (511) further includes a first sliding section (5111) having a first end and a second end, the first end of the second sliding section (5112) being connected to the second end of the first sliding section (5111); and when the powder hopper (21) is in the powder receiving position, the slider (54) is located at the first end of the first sliding section (5111), and when the powder hopper (21) is in the extraction position, the slider (54) is located at the second end of the first sliding section (5111); and is further configured as follows: During the process of the powder hopper (21) swinging from the powder receiving position to the extraction position, the slider (54) slides from the first end of the first sliding section (5111) to the second end, and the push plate (53) remains stationary relative to the powder hopper (21).

5. The coffee machine according to claim 4, characterized in that: The first sliding section (5111) is arc-shaped, and the center of the first sliding section (5111) coincides with the rotation axis of the powder hopper (21).

6. The coffee machine according to claim 1, characterized in that: The powder hopper (21) has a fixed cylinder (212) at the bottom for the push rod (52) to pass through. The tail of the push rod (52) has a movable cylinder (521) that is sleeved with the fixed cylinder (212). The slider (54) is rotatably mounted on the outer peripheral wall of the movable cylinder (521).

7. The coffee machine according to claim 6, characterized in that: The powder pushing unit (5) also includes an elastic element (55) that acts between the fixed cylinder (212) and the movable cylinder (521) so that the slider (54) always tends to abut against the inner wall of the slide groove (511) away from the powder hopper (21).

8. The coffee machine according to any one of claims 1 to 7, characterized in that: An extraction unit (4) is mounted on the base (1), the extraction unit (4) including: The piston assembly (41) is directly opposite the opening (211) of the powder chamber (21) located at the extraction position; as well as The second drive mechanism (42) is used to drive the piston assembly (41) to translate along its axial direction between the relief position and the powder pressing position; In the extraction state, the powder hopper (21) is in the extraction position, the piston assembly (41) is in the powder pressing position, and an extraction chamber is formed between the powder hopper (21) and the piston assembly (41). The piston assembly (41) and the push rod (52) are both sealed to the powder hopper (21).

9. The coffee machine according to claim 8, characterized in that: The chute (511) has a notch (5113) on the inner wall of the first end of the second sliding section (5112) near the powder hopper (21); When the piston assembly (41) just leaves the extraction state, the piston assembly (41) is always sealed to the powder hopper (21) so that the push rod (52) moves along the axial direction of the powder hopper (21) toward the opening (211) under negative pressure, thereby releasing the sealing between the push rod (52) and the powder hopper (21) and driving the slider (54) from the first end of the second sliding section (5112) to the notch (5113).

10. The coffee machine according to claim 8, characterized in that: The first drive mechanism (22) and the second drive mechanism (42) are the same drive mechanism, which includes: The toothed disc (61) has incomplete teeth (611) on its outer peripheral wall; A sector gear (62) is connected to the side of the powder hopper (21) and can mesh with the incomplete gear (611); The connecting rod (63) has its first end hinged to the base (1) and its second end has an arc-shaped limiting groove (631). The crank (64) has a first end hinged to the center of the gear disc (61) and a second end having a rotating wheel (641) that can be slidably inserted into the limiting groove (631). The distance from the first end to the second end of the crank (64) is the same as the radius of the limiting groove (631). The transmission assembly (65) acts between the first end of the connecting rod (63) and the piston assembly (41) to convert the rotational motion of the connecting rod (63) into the translational motion of the piston assembly (41); as well as A drive structure (66) is used to drive the gear disk (61) to rotate around its own axis; When the sector gear (62) is engaged with the incomplete tooth (611), the center of the limiting groove (631) coincides with the rotation axis of the gear disk (61). When the center of the limiting groove (631) is deviated from the rotation axis of the gear disk (61), the sector gear (62) does not mesh with the incomplete tooth (611).

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