Coffee machine

Abstract

According to the coffee machine, an over-travel transmission mechanism is arranged between a movable extraction head and a bag guide main body, and motion travel decoupling under single driving is achieved in combination with physical limiting of a machine body. According to the mechanism, the clamping part is switched among different positioning grooves by utilizing an elastic yielding mechanism, so that the bag guide main body generates relative displacement at a specific stage, and the physical interference of the supporting part on the falling path of the coffee bag is eliminated. And by matching with a locking structure of the chute, the raised line and the hook part, the action time sequence is optimized while the transmission stability and the anti-falling performance are enhanced, the complexity of the system is reduced through simple mechanical connection, the reliability of free falling of the waste coffee bag by virtue of self weight is ensured, and the failure rate of the whole machine is reduced.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to a coffee machine. Background Technology

[0002] In the automated operation of a coffee machine, accurately guiding the coffee bag to the extraction position and ensuring that the discarded coffee bag after extraction can be smoothly detached are key steps to reduce the overall failure rate of the machine and improve the user experience.

[0003] In existing technologies, bag guide structures are generally divided into fixed and moving types. Fixed bag guide frames, because their support structure remains below the coffee bag throughout the extraction process, create continuous physical interference with the waste bag falling under gravity, easily leading to jamming due to adhesion or obstruction of the hot, moist waste bag. While moving bag guide frames can move synchronously with the extraction assembly, they mostly employ a rigid transmission structure.

[0004] In this rigid connection method, the displacement stroke of the guide body and the moving extraction head is completely locked, making it impossible to generate relative displacement during specific action phases, such as the moment the extraction head closes and presses or the moment it resets and unpacks. This prevents the guide structure from retracting in advance to completely avoid the falling path of the waste package. To achieve decoupling of complex action sequences, traditional solutions often require the introduction of additional drive components or multi-stage complex mechanical linkages. This not only significantly increases the production and maintenance costs of the entire machine but also reduces the compactness and operational reliability of the mechanical structure. Summary of the Invention

[0005] To address the aforementioned issues, this application provides a coffee machine that simplifies system construction while eliminating the physical interference of the bag guide structure on the coffee bag's descent process.

[0006] To achieve the above objectives, the coffee machine designed in this application includes a body, a movable extraction head, a fixed head, and a bag guide body; The body is provided with a limiting part for restricting the displacement of the main body of the guide bag; The movable extraction head is connected to a transmission link, and the transmission link is connected to the guide bag body through an over-travel transmission mechanism. The overtravel transmission mechanism has a first transmission position and a second transmission position; The moving extraction head drives the guide bag body to move via the transmission linkage; While the guide body is stopped from moving due to being blocked by the limiting part, the moving extraction head continues to move under the driving force, so as to force the overtravel transmission mechanism to switch between the first transmission position and the second transmission position, and to cause the moving extraction head to generate an overtravel displacement relative to the guide body.

[0007] Preferably, the overtravel transmission mechanism includes a guide groove disposed on the transmission connecting rod, and an elastic arm disposed on the guide body and extending into the guide groove; Along the length of the transmission link, the inner sidewall of the guide groove is provided with a first positioning groove and a second positioning groove at intervals, the first positioning groove and the second positioning groove corresponding to the first transmission position and the second transmission position, respectively; The elastic arm is provided with a snap-fit ​​part, and the elastic arm has an elastic tendency to be tensioned toward the inner sidewall of the guide groove, so that the snap-fit ​​part is elastically held against the first positioning groove or the second positioning groove.

[0008] Preferably, the guide groove is a hollow elongated groove formed in the middle of the transmission connecting rod, and the first positioning groove and the second positioning groove are symmetrically arranged on the inner walls of opposite sides of the hollow elongated groove; The elastic arms are arranged opposite each other, and the two elastic arms extend into the hollow elongated groove together. A deformation space is provided between the two elastic arms to allow the elastic arms to retract and deform inward.

[0009] Preferably, the inner sidewall of the guide groove is provided with a protrusion extending along its length, and the first positioning groove and the second positioning groove are spaced apart on the protrusion; The elastic arm is provided with a sliding groove that slides in conjunction with the protrusion, and the snap-fit ​​part protrudes from the bottom wall of the sliding groove and extends toward the protrusion.

[0010] Preferably, the elastic arm is further provided with a hook, which extends from the edge of the groove and passes over the protrusion to hook onto the side wall of the protrusion on the side away from the elastic arm body.

[0011] Preferably, the hook has an assembly ramp at one end away from the elastic arm body, and the assembly ramp is inclined toward the inlet direction of the guide groove.

[0012] Preferably, the limiting part includes a guide groove formed on the machine body and extending along the length direction of the transmission link, and a slider protruding from the side wall of the guide body and extending into the guide groove; The guide groove has a first stop end wall and a second stop end wall at both ends in the length direction. When the slider abuts against the first stop end wall or the second stop end wall, the displacement of the guide body is restricted to provide the power to force the snap-fit ​​part to disengage from the current positioning slot and slide to another positioning slot.

[0013] Preferably, the side wall of the guide body is further provided with a friction-reducing protrusion, which is located between the slider and the elastic arm; the friction-reducing protrusion abuts against the inner wall of the machine body during the movement of the guide body, so as to maintain a gap between the side wall of the guide body and the inner wall of the machine body.

[0014] Preferably, the guide bag body is provided with a support portion for supporting the bottom of the coffee bag; When the moving extraction head is moving forward and the guide bag body is stopped moving, the overtravel transmission mechanism switches from the first transmission position to the second transmission position, and the moving extraction head is displaced relative to the guide bag body and passes over the support portion.

[0015] Preferably, when the moving extraction head is reversed and the guide bag body stops moving, the moving extraction head is displaced relative to the guide bag body to drive the overtravel transmission mechanism to switch from the second transmission position back to the first transmission position.

[0016] The coffee machine designed in this application achieves decoupling of motion stroke under a single drive by setting an overtravel transmission mechanism between the moving extraction head and the coffee bag guide body, combined with the physical limit of the machine body. This mechanism utilizes an elastic yielding mechanism to allow the locking part to switch between different positioning slots, causing the coffee bag guide body to generate relative displacement at specific stages, eliminating the physical interference of the support part on the falling path of the coffee bag. Combined with the locking structure of the sliding groove protrusion and hook, it enhances transmission stability and anti-dislodgement performance while optimizing the action sequence. The simplified mechanical connection reduces system complexity, ensuring the reliability of discarded coffee bags falling freely under their own weight, and reducing the overall machine failure rate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the coffee machine provided in the embodiments of this application.

[0018] Figure 2 This is a schematic diagram of the structure of the package guide body provided in the embodiments of this application.

[0019] Figure 3 This is an assembly diagram of the transmission connecting rod provided in an embodiment of this application.

[0020] Figure 4 This is a schematic diagram of the overtravel transmission mechanism provided in the embodiments of this application.

[0021] Figure 5 This is an exploded view of the overtravel transmission mechanism provided in the embodiments of this application.

[0022] The components include: body 10, limiting part 11, first stop end wall 111, second stop end wall 112, moving extraction head 20, fixed head 30, guide bag body 40, slider 41, friction-reducing protrusion 42, support part 43, transmission link 50, overtravel transmission mechanism 60, guide groove 61, protrusion 611, elastic arm 62, slide groove 621, snap-fit ​​part 65, hook part 622, assembly inclined surface 623, deformation space 66, first positioning groove 63, and second positioning groove 64. Detailed Implementation

[0023] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0024] like Figures 1 to 5 As shown, this embodiment provides a coffee machine including a body 10, a movable extraction head 20, a fixed head 30, and a coffee bag guide body 40. The coffee bag guide body 40 is used to carry and guide the coffee bag to a predetermined extraction position during the initial operation of the coffee machine. In order to limit the movement range of the coffee bag guide body 40, the body 10 is provided with a limiting part 11 for limiting the displacement of the coffee bag guide body 40.

[0025] The movable extraction head 20 is connected to a transmission link 50, and the transmission link 50 is connected to the guide bag body 40 via a trip transmission mechanism 60. The trip transmission mechanism 60 has a first transmission position and a second transmission position, which correspond to the relative position states of the transmission link 50 and the guide bag body 40 at different working stages.

[0026] During the synchronous movement without any limiting or obstruction, the moving extraction head 20 drives the guide bag body 40 to move synchronously via the transmission link 50. When the guide bag body 40 stops moving due to contact with the limiting part 11, the moving extraction head 20 continues to move under the action of an external driving force, forcing the overtravel transmission mechanism 60 to switch between the first transmission position and the second transmission position, thereby causing the moving extraction head 20 to generate an overtravel displacement relative to the guide bag body 40. Through this overtravel displacement, this embodiment achieves relative displacement control of the guide bag body 40 during a specific working stage under the action of a single driving source, thus completely eliminating the physical interference of the guide bag body 40 on the falling path of the coffee bag during the unpacking stage.

[0027] In some embodiments, such as Figures 2 to 5As shown, the overtravel transmission mechanism 60 includes a guide groove 61 disposed on the transmission link 50, and an elastic arm 62 disposed on the guide body 40 and extending into the guide groove 61; along the length direction of the transmission link 50, a first positioning groove 63 and a second positioning groove 64 are provided at intervals on the inner sidewall of the guide groove 61, the first positioning groove 63 and the second positioning groove 64 respectively corresponding to the first transmission position and the second transmission position of the transmission mechanism.

[0028] Furthermore, such as Figure 2 , Figure 3 , Figure 4 As shown, the elastic arm 62 is provided with a locking part 65. The elastic arm 62 has an elastic structural characteristic of being tensioned toward the inner wall of the guide groove 61, so that the locking part 65 elastically abuts against the first positioning groove 63 or the second positioning groove 64. Through this elastic abutment, when the guide bag body 40 is not physically blocked, the transmission link 50 and the guide bag body 40 can maintain stable synchronous transmission.

[0029] In some preferred embodiments, such as Figure 3 , Figure 4 As shown, the guide groove 61 is a hollow elongated groove formed in the middle of the transmission connecting rod 50. The first positioning groove 63 and the second positioning groove 64 are symmetrically arranged on the inner walls of opposite sides of the hollow elongated groove. Correspondingly, two elastic arms 62 are arranged opposite each other, and the two elastic arms 62 extend into the hollow elongated groove together, and a deformation space 66 is provided between the two elastic arms 62 to allow them to retract and deform inward. During the overtravel switching process, the two elastic arms 62 are squeezed by the groove wall and retract into the deformation space 66, realizing cross-groove sliding with bidirectional force balance, avoiding transmission sway caused by unilateral force.

[0030] In some embodiments, such as Figure 2 , Figure 3 , Figure 4 As shown, the inner wall of the guide groove 61 is provided with a protrusion 611 extending along its length, and the first positioning groove 63 and the second positioning groove 64 are spaced apart on the protrusion 611. The elastic arm 62 is provided with a sliding groove 621 that slides with the protrusion 611, and the engaging part 65 protrudes from the bottom wall of the sliding groove 621 and extends toward the protrusion 611. Through the sliding engagement of the sliding groove 621 and the protrusion 611, the guiding stability of the elastic arm 62 during displacement switching is effectively enhanced.

[0031] In some embodiments, such as Figure 2 , Figure 4As shown, the elastic arm 62 is also provided with a hook 622, which extends from the edge of the groove 621 and passes over the protrusion 611 to hook onto the side wall of the protrusion 611 on the side away from the body of the elastic arm 62. This anti-disengagement structure restricts the degree of freedom of the elastic arm 62 in the direction perpendicular to the surface of the protrusion 611, preventing the overtravel transmission mechanism 60 from disengaging during frequent switching or under the action of unexpected lateral forces.

[0032] In some embodiments, such as Figure 2 , Figure 4 As shown, the hook portion 622 has an assembly ramp 623 at the end away from the body of the elastic arm 62, and the assembly ramp 623 is inclined toward the inlet direction of the guide groove 61. During assembly, the assembly ramp 623 is squeezed by the edge of the inlet of the guide groove 61, guiding the elastic arm 62 to retract inward. After passing the edge, it elastically resets and engages with the protrusion 611, thereby significantly simplifying the assembly process.

[0033] In some embodiments, such as Figure 1 , Figure 4 As shown, the limiting part 11 includes a guide groove formed on the body 10 and extending along the length of the transmission link 50, and a slider 41 protruding from the side wall of the guide bag body 40 and extending into the guide groove. The guide groove has a first stop end wall 111 and a second stop end wall 112 at its two ends in the length direction. When the slider 41 abuts against the first stop end wall 111 or the second stop end wall 112, the displacement of the guide bag body 40 is restricted. Through the rigid stopping action of the body 10, the thrust continuously applied by the drive source is converted into a switching force that forces the locking part 65 to disengage from the current positioning slot and slide to another positioning slot.

[0034] In some embodiments, such as Figure 2 As shown, the side wall of the guide body 40 is also provided with a friction-reducing protrusion 42, which is located between the slider 41 and the elastic arm 62. During the movement of the guide body 40, the friction-reducing protrusion 42 abuts against the inner wall of the body 10 to maintain a gap between the side wall of the guide body 40 and the inner wall of the body 10. This design transforms large-area surface contact into localized contact, effectively reducing frictional resistance during movement and preventing water film adsorption under humid and hot conditions, ensuring the smoothness and responsiveness of the guide body 40's displacement.

[0035] In some embodiments, such as Figure 2As shown, the coffee bag guide body 40 is provided with a support portion 43 for supporting the bottom of the coffee bag. This application achieves displacement decoupling between the coffee bag guiding action and the extraction action through the switching action of the over-travel transmission mechanism 60. In the complete extraction process, see [reference needed]. Figure 4 , Figure 5 The dynamic coordination process is as follows: During the bag feeding and pre-closing stages, the overtravel transmission mechanism 60 is initially in the first transmission position. As the drive source inside the coffee machine operates, the transmission linkage 50 drives the bag guide body 40 to move forward, conveying the coffee bag supported on the support part 43 to the extraction preparation position.

[0036] When the moving extraction head 20 is moving forward and the guide bag body 40 has stopped moving, that is, after the slider 41 abuts against the first stop end wall 111, the guide bag body 40 is blocked and stops its forward displacement. At this time, the moving extraction head 20 continues to move forward, forcing the overtravel transmission mechanism 60 to switch from the first transmission position to the second transmission position. During this overtravel displacement, the moving extraction head 20 generates a relative displacement with respect to the guide bag body 40 and passes over the support part 43. The moving extraction head 20 continues to extend forward to drive the coffee bag to move and close with the fixing head 30. Due to the generation of the above relative displacement, the support part 43 remains in the rear position relative to the moving extraction head 20, thereby retracting from the area directly below the coffee bag before the extraction action occurs.

[0037] When the extraction is completed and the unpacking action is performed, the moving extraction head 20 moves in the reverse direction to reset. Since the overtravel transmission mechanism 60 is in the second transmission position, the transmission link 50 drives the guide body 40 to move synchronously in the reverse direction. When the moving extraction head 20 has reset and the guide body 40 has stopped moving, that is, after the slider 41 abuts against the second stop end wall 112 in the reverse direction, the guide body 40 is blocked and stops its reverse displacement. The moving extraction head 20 continues to move in the reverse direction, generating a reverse relative displacement relative to the guide body 40, thereby driving the overtravel transmission mechanism 60 to switch from the second transmission position back to the first transmission position.

[0038] At this point, the overtravel transmission mechanism 60 has completed its reset. During the process of the discarded coffee bag detaching from the clamping of the moving extraction head 20 and the fixed head 30, since the support part 43 directly below is in a clearance position and there is no obstruction structure on the falling path, the discarded coffee bag loses its support and falls freely under its own gravity, thereby avoiding the problem of bag jamming caused by physical interference, and then prepares to enter the next extraction cycle.

[0039] The coffee machine provided in this application embodiment achieves decoupling of motion stroke under a single drive by setting an overtravel transmission mechanism between the moving extraction head and the guide bag body, combined with the physical limit of the machine body. This mechanism utilizes an elastic yielding mechanism to allow the locking part to switch between different positioning slots, causing the guide bag body to generate relative displacement at a specific stage, eliminating the physical interference of the support part on the falling path of the coffee bag. Combined with the locking structure of the sliding groove protrusion and hook, it enhances transmission stability and anti-dislodgement performance while optimizing the action sequence. The simplified mechanical connection reduces system complexity, ensuring the reliability of discarded coffee bags falling freely under their own weight, and reducing the overall machine failure rate.

[0040] In the description of this application, it should be noted that the terms "vertical", "up", "down", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0041] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of this application and are not intended to limit this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coffee machine, characterized in that, Includes the main body, moving extraction head, fixed head, and guide bag body; The body is provided with a limiting part for restricting the displacement of the main body of the guide bag; The movable extraction head is connected to a transmission link, and the transmission link is connected to the guide bag body through an over-travel transmission mechanism. The overtravel transmission mechanism has a first transmission position and a second transmission position; The moving extraction head drives the guide bag body to move via the transmission linkage; While the guide body is stopped from moving due to being blocked by the limiting part, the moving extraction head continues to move under the driving force, so as to force the overtravel transmission mechanism to switch between the first transmission position and the second transmission position, and to cause the moving extraction head to generate an overtravel displacement relative to the guide body.

2. The coffee machine according to claim 1, characterized in that, The overtravel transmission mechanism includes a guide groove disposed on the transmission link and an elastic arm disposed on the guide body and extending into the guide groove; Along the length of the transmission link, the inner sidewall of the guide groove is provided with a first positioning groove and a second positioning groove at intervals, the first positioning groove and the second positioning groove corresponding to the first transmission position and the second transmission position, respectively; The elastic arm is provided with a snap-fit ​​part, and the elastic arm has an elastic tendency to be tensioned toward the inner sidewall of the guide groove, so that the snap-fit ​​part is elastically held against the first positioning groove or the second positioning groove.

3. The coffee machine according to claim 2, characterized in that, The guide groove is a hollow elongated groove formed in the middle of the transmission connecting rod, and the first positioning groove and the second positioning groove are symmetrically arranged on the inner walls of the opposite sides of the hollow elongated groove. The elastic arms are arranged opposite each other, and the two elastic arms extend into the hollow elongated groove together. A deformation space is provided between the two elastic arms to allow the elastic arms to retract and deform inward.

4. The coffee machine according to claim 2, characterized in that, The inner wall of the guide groove is provided with a protrusion extending along its length direction, and the first positioning groove and the second positioning groove are spaced apart on the protrusion. The elastic arm is provided with a sliding groove that slides in conjunction with the protrusion, and the snap-fit ​​part protrudes from the bottom wall of the sliding groove and extends toward the protrusion.

5. The coffee machine according to claim 4, characterized in that, The elastic arm is also provided with a hook, which extends from the edge of the groove and passes over the protrusion to hook onto the side wall of the protrusion on the side away from the elastic arm body.

6. The coffee machine according to claim 5, characterized in that, The hook has an assembly ramp at one end away from the elastic arm body, and the assembly ramp is inclined toward the inlet direction of the guide groove.

7. The coffee machine according to claim 2, characterized in that, The limiting part includes a guide groove formed on the body and extending along the length of the transmission link, and a slider protruding from the side wall of the guide body and extending into the guide groove. The guide groove has a first stop end wall and a second stop end wall at both ends in the length direction. When the slider abuts against the first stop end wall or the second stop end wall, the displacement of the guide body is restricted to provide the power to force the snap-fit ​​part to disengage from the current positioning slot and slide to another positioning slot.

8. The coffee machine according to claim 7, characterized in that, The side wall of the guide body is also provided with a friction-reducing protrusion, which is located between the slider and the elastic arm. The friction-reducing protrusion abuts against the inner wall of the machine body during the movement of the guide body, so as to maintain a gap between the side wall of the guide body and the inner wall of the machine body.

9. The coffee machine according to claim 1, characterized in that, The main body of the guide bag is provided with a support for supporting the bottom of the coffee bag; When the moving extraction head is moving forward and the guide bag body is stopped moving, the overtravel transmission mechanism switches from the first transmission position to the second transmission position, and the moving extraction head is displaced relative to the guide bag body and passes over the support portion.

10. The coffee machine according to claim 9, characterized in that, When the moving extraction head is reversed and the guide body stops moving, the moving extraction head is displaced relative to the guide body to drive the overtravel transmission mechanism to switch from the second transmission position back to the first transmission position.

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