Powder pressing mechanism for coffee brewing device and coffee brewing device

Abstract

The utility model discloses a powder pressing mechanism used for a coffee brewing device and the coffee brewing device, the powder pressing mechanism used for the coffee brewing device comprises a driving mechanism, a transmission mechanism and a powder pressing head, the transmission mechanism is in transmission connection with the powder pressing head so as to drive the powder pressing head to ascend and descend, so that the powder pressing head is located at a starting position or a working position; the transmission mechanism comprises a first transmission part which is driven by a driving mechanism to rotate; the second transmission part sleeves the periphery of the first transmission part and is in threaded connection with the first transmission part so as to be capable of ascending and descending; at least part of the rotating frame is arranged in the first transmission part and can rotate along with the first transmission part, and the powder pressing head is fixedly connected with the rotating frame; the bottom face of the rotating frame penetrates through the first transmission piece and is supported on the inner side of the bottom face of the second transmission piece, and therefore the rotating frame can ascend and descend relative to the first transmission piece along with the second transmission piece.

Description

Technical Field

[0001] The utility model relates to a beverage brewing device, in particular to a powder pressing mechanism used for a coffee brewing device and a coffee brewing device using the powder pressing mechanism. Background Art

[0002] As a symbol of modern life, coffee is gradually entering people's daily work, study and life. The coffee processing process includes the following steps: grinding coffee beans into coffee powder; putting the coffee powder into a coffee box; and squeezing the coffee powder into a certain shape in the coffee box before extracting it.

[0003] Under normal conditions, coffee powder easily loses its aroma due to oxidation, so a coffee bean grinding machine that allows ordinary consumers to grind coffee beans into coffee powder and perform powder pressing and extraction came into being. For example, the Chinese patent application number 202320718863.7 of the applicant discloses a powder pressing mechanism for a coffee brewing device, including a driving mechanism, a transmission member and a powder pressing head. The driving mechanism and the transmission member constitute a linear driving module. The transmission member is connected to the powder pressing head as the output end of the linear driving module, and can drive the powder pressing head to rise and fall, so that the powder pressing head is in a starting position or a working position.

[0004] However, in the above-mentioned powder pressing mechanism, the driving mechanism drives the transmission member through the gear set, and the final gear of the gear set is arranged outside the transmission member, which causes the shell of the powder pressing mechanism to be convex at the position corresponding to the final gear, and the coffee powder placed in the container may be lifted up and enter between the shell and the transmission member, resulting in affecting the normal operation of the moving mechanism; in addition, the powder pressing head can only move up and down, and cannot play a role in flattening the coffee powder when pressing the powder, resulting in uneven force, affecting the compaction of the coffee powder, and ultimately affecting the taste after extraction and brewing. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide a powder pressing mechanism for a coffee brewing device in view of the deficiencies in the above-mentioned prior art, which can ensure the flatness of the coffee powder during pressing, make the pressing force uniform, and improve the coffee taste.

[0006] The second technical problem to be solved by the present invention is to provide a coffee brewing device using the above-mentioned powder pressing mechanism.

[0007] The technical solution adopted by the utility model to solve the above-mentioned first technical problem is: a powder pressing mechanism for a coffee brewing device, comprising a driving mechanism, a transmission mechanism and a powder pressing head, wherein the transmission mechanism is in transmission connection with the powder pressing head, so as to drive the powder pressing head to rise and fall, so that the powder pressing head is in a starting position or a working position; the characteristics are:

[0008] The transmission mechanism comprises:

[0009] A first transmission member is driven to rotate by a driving mechanism;

[0010] A second transmission member is sleeved on the outer periphery of the first transmission member and is threadedly connected to the first transmission member so as to be able to rise and fall; and

[0011] The rotating frame is at least partially arranged in the first transmission member and can rotate with the first transmission member. The powder pressing head is connected and fixed to the rotating frame. The bottom surface of the rotating frame passes through the first transmission member and is supported on the inner side of the bottom surface of the second transmission member, so that it can be lifted and lowered relative to the first transmission member with the second transmission member.

[0012] By allowing the tamping head to rotate while being raised or lowered, it is possible to ensure that the coffee powder is spread flat during tamping, so that the tamping force is uniform and the coffee taste is improved.

[0013] Furthermore, the powder pressing mechanism also includes a shell and a first sealing member, the second transmission member is in the shape of a hollow sleeve and is arranged in the shell, and the first sealing member abuts between the inner wall surface of the shell and the outer wall surface of the second transmission member. Since the second transmission member is on the outer periphery of the first transmission member, it can be internally connected to the first transmission member for transmission, so the outer wall surface can be a roughly smooth wall surface, which can facilitate the setting of the first sealing member to prevent powder residue from being lifted up and entering the transmission mechanism and the driving mechanism, thereby ensuring normal movement.

[0014] Preferably, the driving mechanism comprises a motor and a gear set for reducing speed, the primary gear of the gear set is drivingly connected to the output end of the motor, and the final gear of the gear set is drivingly connected to the first transmission member of the transmission mechanism.

[0015] The first technical solution adopted by the utility model to solve the above-mentioned second technical problem is: a coffee brewing device, including a container for holding coffee powder, the top of the container is open, and is characterized in that: the coffee brewing device is applied with the powder pressing mechanism as described above, when the powder pressing head is in the starting position, the container is located under the powder pressing head, the working position includes a first working position, when the powder pressing head is in the first working position, the powder pressing head is pressed down into the container.

[0016] To facilitate the injection of hot water into the container for brewing, the coffee brewing device also includes a water injection pipe for injecting water for brewing coffee powder, the water injection pipe penetrates into the rotating frame, a water path is formed in the rotating frame, the water path runs through the bottom of the rotating frame, a valve is arranged at the bottom of the water path, a first elastic member is arranged between the valve and the bottom of the powder pressing head, so that the valve maintains a tendency to be pressed against the bottom of the water path, and the water path can be connected with the container through the powder pressing head.

[0017] The second technical solution adopted by the utility model to solve the above-mentioned second technical problem is: a coffee brewing device, including a container for containing coffee powder, the top of the container is open, and is characterized in that: the coffee brewing device is applied with the powder pressing mechanism, the powder pressing head can be raised and lowered in the shell and the container, the bottom of the shell is open, the container is arranged under the open part of the shell, and the shell is provided with a feeding port for the coffee powder to pass through and enter the shell.

[0018] In order to prevent the feed port of the shell from being always open, causing water vapor to enter the grinding mechanism of the coffee brewing device, the powder pressing mechanism also includes a baffle, which can be raised or lowered to open or close the feed port.

[0019] Further, the baffle is arranged in the housing and adjacent to the feed port, the baffle comprises a plate body adapted to the feed port and a key portion protruding inwardly from the plate body, a groove extending up and down is formed on the outer peripheral wall surface of the second transmission member, and the key portion is inserted into the groove;

[0020] The working position also includes a second working position. When the powder pressing head rises from the starting position to the second working position, the baffle is pushed upward by the second transmission member to open the feed port.

[0021] The baffle plate keeps a tendency to close the feed opening downward, so that the baffle plate rises and falls along with the second transmission member, which can simplify the movement mechanism of the baffle plate.

[0022] In order to facilitate the guidance of the movement of the smoke baffle, a guide seat is arranged in the shell, and the baffle is confined in the guide seat and moves up and down along the guide seat.

[0023] In order to further prevent the feed port of the shell from being always open, causing water vapor to enter the grinding mechanism of the coffee brewing device, the powder pressing mechanism also includes a second sealing member, and an opening is formed on the guide seat at a position corresponding to the feed port. The second sealing member is arranged between the guide seat and the feed port, and is sealed around the feed port and the opening at the same time.

[0024] Compared with the prior art, the advantages of the utility model are: by allowing the powder pressing head to rotate when being raised or lowered, it is possible to ensure the flatness of the coffee powder during pressing, so that the pressing force is uniform and the taste of the coffee is improved; since the second transmission member is on the outer periphery of the first transmission member, it can be internally connected to the first transmission member for transmission, so the outer wall surface can be a roughly smooth wall surface, which makes it easy to set the first sealing member to prevent powder residue from being lifted up and entering the transmission mechanism and the drive mechanism, thereby ensuring normal movement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic diagram of a powder pressing mechanism and a container of a coffee brewing device according to an embodiment of the utility model;

[0026] Figure 2 Schematic diagram of the powder pressing mechanism and container of the coffee brewing device according to the utility model (with Figure 1 different perspectives);

[0027] Figure 3 This is a cross-sectional view of the powder pressing mechanism and container of the coffee brewing device according to an embodiment of the utility model (initial position);

[0028] Figure 4 It is a schematic diagram of a hidden shell of a powder pressing mechanism of a coffee brewing device according to an embodiment of the utility model;

[0029] Figure 5 This is a schematic diagram of the exploded structure of the powder pressing mechanism and container of the coffee brewing device according to an embodiment of the utility model;

[0030] Figure 6 It is a partial exploded structural schematic diagram of the powder pressing mechanism of the coffee brewing device according to an embodiment of the utility model;

[0031] Figure 7 It is a schematic diagram of a partially exploded structure of a transmission mechanism of a powder pressing mechanism of a coffee brewing device according to an embodiment of the utility model;

[0032] Figure 8 It is a partial top view of the transmission mechanism of the powder pressing mechanism of the coffee brewing device according to the embodiment of the utility model;

[0033] Fig. 9 This is a cross-sectional view of the powder pressing mechanism and container of the coffee brewing device according to an embodiment of the utility model (lowest position);

[0034] Fig.10 This is a cross-sectional view (highest position) of the powder pressing mechanism and container of the coffee brewing device according to an embodiment of the present utility model. DETAILED DESCRIPTION

[0035] Embodiments of the present utility model are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions.

[0036] In the description of the present utility model, 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 indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Since the embodiments disclosed in the present utility model can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of such features.

[0037] See also Figures 1 to 8 A coffee brewing device includes a powder pressing mechanism 1 and a container 2. Other components, such as a grinding mechanism, a water pump, a heater, a casing, etc., are the same as the prior art and are not shown in the drawings.

[0038] The powder pressing mechanism 1 comprises a driving mechanism 11, a transmission mechanism 12, a powder pressing head 13 and a housing 14. The housing 14 is hollow. In the initial state, the transmission mechanism 12 and the powder pressing head 13 are located in the housing 14. The housing 14 can be formed by buckling together multiple parts, such as Figure 5 As shown in , it is composed of three parts, and optionally, two or more than three parts can be set as needed. The driving mechanism 11 includes a motor 111 and a gear set 112 for deceleration. The primary gear 1121 of the gear set 112 is transmission-connected with the output end of the motor 111. The optional transmission connection method is that a worm is provided on the output end of the motor 111, the primary gear 1121 is a worm wheel, and the final gear 1122 of the gear set 112 is transmission-connected with the transmission mechanism 12. In this embodiment, the transmission mechanism 12 includes a first transmission member 121 and a second transmission member 122. The first transmission member 121 is in the shape of a hollow sleeve with two ends opened. The final gear 1122 can be connected and fixed to the first transmission member 121, or the two can be integrally formed components, as long as the final gear 1122 can drive the first transmission member 121 to rotate. The second transmission member 122 is disposed on the outer periphery of the first transmission member 121, and may also be in the shape of a hollow sleeve, with an outer wall surface being a generally smooth wall surface, and may be threadedly connected with the first transmission member 121, that is, an outer thread is formed on the outer periphery of the first transmission member 121, and an inner thread is formed on the inner periphery of the second transmission member 122. Thus, when the first transmission member 121 rotates with the final gear 1122, the second transmission member 122 may rise and fall relative to the first transmission member 121.

[0039] The transmission mechanism 12 also includes a rotating frame 123, which is at least partially arranged in the first transmission member 121, and can rotate with the first transmission member 121, and can also rise and fall relative to the first transmission member 121. As optional, the first transmission member 121 and the rotating frame 123 are connected in the form of a keyway. The compressed powder head 13 is arranged under the bottom of the second transmission member 122, and it can pass through the bottom of the second transmission member 122 through a screw 131 to be fixedly connected to the rotating frame 123. The bottom surface of the rotating frame 123 is supported on the inner side of the bottom surface of the second transmission member 122. When the second transmission member 122 descends, the rotating frame 123 descends due to gravity. When the second transmission member 122 rises, the rotating frame 123 is lifted up. As a result, the compressed powder head 13 moves up and down and rotates with the rotating frame 123. In the installed state, the rotation axis of the compressed powder head 13 is in the vertical direction. By enabling the tamping head 13 to rotate while being raised or lowered, it is possible to ensure that the coffee powder is spread flat during tamping, so that the tamping force is uniform and the coffee taste is improved.

[0040] The bottom of the housing 14 is open to allow the powder pressing head 13 to pass through. The container 2 is detachably arranged below the open position of the housing 14. The top of the container 2 is open and hollow inside, corresponding to the powder pressing head 13. In this embodiment, the container 2 and the housing 14 are plugged together. The container 2 can be used as a powder box (for holding coffee powder ground by the grinding mechanism 3) or as a capsule box (for holding capsule coffee).

[0041] In order to prevent the powder residue in the container 2 from being lifted up and entering the transmission mechanism 12, the powder pressing mechanism 1 also includes a first sealing member 17, which abuts between the inner wall surface of the shell 14 and the outer wall surface of the second transmission member 122. In order to facilitate the definition of the position of the first sealing member 17, it can partially pass through the shell 14 and partially penetrate the outer wall surface of the second transmission member 122.

[0042] The coffee brewing device further includes a water injection pipe 3 for injecting water for brewing coffee powder, which penetrates into the rotating frame 123. A water channel 1231 is formed in the rotating frame 123. The water channel 1231 runs through the bottom of the rotating frame 123. A valve 32 is arranged at the bottom of the water channel 1231. A first elastic member 33, such as a spring, is arranged between the valve 32 and the bottom of the powder pressing head 13 to keep the valve 32 pressed against the bottom of the water channel 1231. When hot water is injected from the water injection pipe 3, as the water pressure increases until it is greater than the elastic force of the first elastic member 33, the valve 32 is pressed downward, and the hot water passes through the powder pressing head 13 and enters the container 2.

[0043] A feed port 142 is provided on the wall of the housing 14 for coffee powder of the grinding mechanism to enter. In order to prevent water vapor from entering the grinding mechanism during coffee brewing, which may cause the powder inside to agglomerate, the powder pressing mechanism 1 further includes a baffle 15 and a second elastic member 16, which are arranged on the inner side of the housing 14. The baffle 15 can open or close the feed port 142, and the second elastic member 16 is used to reset the baffle 15. The baffle 15 includes a plate body 151 adapted to the feed port 142 and a protrusion 152 protruding outward (in a direction away from the transmission mechanism 12 and the powder pressing head 13) on the plate body 151. In order to facilitate the limitation of the path of the baffle 15, a guide seat 143 is provided on the inner side wall of the housing 14, and the guide seat 143 is located between the baffle 15 and the second transmission member 122. The baffle 15 can be limited in the guide seat 143 and move up and down along the guide seat 143. The lower end of the second elastic member 16 abuts against the protrusion 152, and the upper end abuts against the top of the guide seat 143, thereby maintaining the tendency to press the baffle 15 downward to close the feed port 142. The second elastic member 16 is preferably a spring. To prevent the spring from dislocating, a positioning column or the like may be provided to limit the position of the spring. An opening 1431 is formed on the guide seat 143 at a position corresponding to the feed port 142 to allow coffee powder to pass through. The opening 1431 may be opened and closed when the baffle 15 is raised or lowered, so that the feed port 142 is opened and closed. Alternatively, a separate guide seat 143 may not be provided, and a guide groove may be directly provided on the inner side wall of the shell 14 to limit the moving path of the baffle 15. In this case, the upper end of the second elastic member 16 may directly abut against the inner side wall of the shell 14.

[0044] To further prevent moisture from entering the grinding mechanism, a second sealing member 18 is further provided in the housing 14 . The second sealing member 18 is provided between the guide seat 143 and the feed port 142 , and seals around the feed port 142 and also around the opening 1431 .

[0045] The baffle 15 further includes a key portion 153 formed on the plate body 151 and passing through the guide seat 143. A groove 1221 extending up and down is formed on the outer peripheral wall of the second transmission member 122. The key portion 153 can be inserted into the groove 1221. The bottom of the groove 1221 is closed and does not pass through the second transmission member 122, so as to support the key portion 153. Therefore, when the second transmission member 122 rises, the baffle 15 can be pushed up.

[0046] The working principle of the coffee brewing device of the utility model is as follows: before the coffee brewing device starts working, refer to Figure 3, the powder pressing head 13 is at the starting position, the container 2 is below the powder pressing head 3, the bottom of the powder pressing head 13 corresponds to the top of the container 2, and the baffle 15 is at the position of closing the feed port 142. Then, the driving mechanism 11 of the powder pressing mechanism 1 drives the second transmission mechanism 122 to move upward, thereby lifting the rotating frame 123 upward, and driving the powder pressing head 13 to move upward to the highest position (second working position), see Fig.10 When the second transmission mechanism 122 rises, the baffle 15 is pushed upward, thereby opening the feed port 142. During the rising process of the baffle 15, the second elastic member 16 is compressed; the grinding mechanism is started, and the coffee powder enters the container 2 through the feed port 142 (opening 1431). When the preset powder amount is reached, the grinding mechanism stops working; then, the driving mechanism 11 of the powder pressing mechanism 1 drives the second transmission member 122 downward, and the rotating frame 123 rotates downward together with the powder pressing head 13, see Fig. 9 As the second transmission mechanism 122 descends and no longer applies an upward force to the baffle 15, the baffle 15 is reset downward under the restoring force of the second elastic member 16 until the feed port 142 is closed, and thereafter the second transmission member 122 continues to descend so that the powder pressing head 13 continues to be pressed into the container 2 until it reaches the lowest position (the first working position) to compact the coffee powder in the container 2; finally, the water pump and the heater are started, and hot water enters the container 2 through the water injection pipe 3 to extract and brew the coffee.

Claims

1. A powder pressing mechanism for a coffee brewing device, comprising a driving mechanism (11), a transmission mechanism (12) and a powder pressing head (13), wherein the transmission mechanism (12) is in driving connection with the powder pressing head (13), so as to drive the powder pressing head (13) to rise and fall, so that the powder pressing head (13) is in a starting position or a working position; characterized in that: The transmission mechanism (12) comprises: A first transmission member (121) is driven to rotate by the driving mechanism (11); A second transmission member (122) is sleeved on the outer periphery of the first transmission member (121) and is threadedly connected to the first transmission member (121) so as to be able to be raised and lowered; and The rotating frame (123) is at least partially arranged in the first transmission member (121) and can rotate with the first transmission member (121). The powder pressing head (13) is connected and fixed to the rotating frame (123); the bottom surface of the rotating frame (123) passes through the first transmission member (121) and is supported on the inner side of the bottom surface of the second transmission member (122), so that it can be raised and lowered relative to the first transmission member (121) along with the second transmission member (122).

2. The powder pressing mechanism for a coffee brewing device according to claim 1, characterized in that: The powder pressing mechanism further comprises a shell (14) and a first sealing member (17); the second transmission member (122) is in the shape of a hollow sleeve and is arranged in the shell (14); the first sealing member (17) abuts between the inner wall surface of the shell (14) and the outer wall surface of the second transmission member (122).

3. The powder pressing mechanism for a coffee brewing device according to claim 1 or 2, characterized in that: The driving mechanism (11) comprises a motor (111) and a gear set (112) for reducing speed, wherein a primary gear (1121) of the gear set (112) is transmission-connected to an output end of the motor (111), and a final gear (1122) of the gear set (112) is transmission-connected to a first transmission member (121) of the transmission mechanism (12).

4. A coffee brewing device, comprising a container (2) for containing coffee powder, the top of the container (2) being open, characterized in that: The coffee brewing device is applied with a powder pressing mechanism as described in any one of claims 1 to 3, when the powder pressing head (13) is in a starting position, the container (2) is located below the powder pressing head (13), and the working position includes a first working position, when the powder pressing head (13) is in the first working position, the powder pressing head (13) is pressed downward into the container (2).

5. The coffee brewing device according to claim 4, characterized in that: The coffee brewing device further comprises a water injection pipe (3) for injecting water for brewing coffee powder, the water injection pipe (3) penetrates into the rotating frame (123), a water channel (1231) is formed in the rotating frame (123), the water channel (1231) passes through the bottom of the rotating frame (123), a valve (32) is arranged at the bottom of the water channel (1231), a first elastic member (33) is arranged between the valve (32) and the bottom of the powder pressing head (13), so that the valve (32) maintains a tendency to be pressed against the bottom of the water channel (1231), and the water channel (1231) can be connected with the container (2) through the powder pressing head (13).

6. A coffee brewing device, comprising a container (2) for containing coffee powder, the top of the container (2) being open, characterized in that: The coffee brewing device is provided with a powder pressing mechanism as claimed in claim 2, wherein the powder pressing head (13) can be raised and lowered in a shell (14) and a container (2), the bottom of the shell (14) is open, the container (2) is arranged below the open portion of the shell (14), and a feed port (142) is provided on the shell (14) for coffee powder to pass through and enter the shell (14).

7. The coffee brewing device according to claim 6, characterized in that: The powder pressing mechanism further comprises a baffle (15), and the baffle (15) can be raised or lowered to open or close the feed port (142).

8. The coffee brewing device according to claim 7, characterized in that: The baffle (15) is arranged in the housing (14) and adjacent to the feed port (142), the baffle (15) comprising a plate body (151) adapted to the feed port (142) and a key portion (153) protruding inward from the plate body (151), a groove (1221) extending up and down is formed on the outer peripheral wall surface of the second transmission member (122), and the key portion (153) is inserted into the groove (1221); The working position also includes a second working position. When the powder pressing head (13) rises from the starting position to the second working position, the baffle (15) is pushed upward by the second transmission member (122) to open the feed port (142). The baffle (15) maintains a tendency to close the feed opening (142) downward.

9. The coffee brewing device according to claim 7, characterized in that: A guide seat (143) is provided in the housing (14), and the baffle (15) is confined in the guide seat (143) and moves up and down along the guide seat (143).

10. The coffee brewing device according to claim 9, characterized in that: The powder pressing mechanism also includes a second sealing member (18); an opening (1431) is formed on the guide seat (143) at a position corresponding to the feed port (142); the second sealing member (18) is arranged between the guide seat (143) and the feed port (142), and simultaneously seals around the feed port (142) and the opening (1431).

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