Self-locking mechanism for a capsule coffee machine

Abstract

The utility model discloses a capsule coffee machine self -locking mechanism belongs to coffee machine field, has solved the problem of unreliable and complex structure of prior art's self -locking mechanism, technical scheme still is equipped with handle assembly and connecting rod mechanism on brewing main part, handle assembly includes handle and pull rod, handle rotation connects on brewing main body, one end of connecting rod mechanism is hinged with brewing department, the other end of connecting rod mechanism is hinged with the tail end of brewing main body, and the both ends of pull rod are hinged with handle and connecting rod mechanism respectively, handle drives connecting rod mechanism movement through pull rod to make brewing department have the first working position of being close to brewing head and the second working position of being away from brewing head, and pull rod is equipped with first friction piece, and connecting rod mechanism is equipped with second friction piece, and when brewing department is in the second working position, first friction piece and second friction piece contact and produce friction resistance to restrict brewing department movement. The utility model makes the structure of self -locking mechanism more simple and promotes self -locking stability.

Description

Technical Field

[0001] This utility model relates to the field of coffee machines, and in particular to a self-locking mechanism for capsule coffee machines. Background Technology

[0002] Currently, most coffee capsule machines (including beverage machines) on the market use a crank-connecting rod mechanism for their extraction mechanism. This means they have a handle (crank) that is hinged to the brewing unit via a connecting rod mechanism. The movement of the handle causes the brewing unit to reciprocate, thus compressing and opening the capsule. To achieve self-locking of the brewing unit, existing technologies, such as invention patent CN101036562A and utility model patent CN217852457U, disclose adding a spring to the connecting rod, using the principle of bicycle legs to pull the handle and create self-locking. However, adding a spring not only increases the complexity of the overall mechanical structure and may affect the layout and design optimization space of other components, but also, as a consumable part, the spring may fatigue or lose elasticity after long-term use, leading to unreliable self-locking function. Utility Model Content

[0003] The purpose of this invention is to provide a self-locking mechanism for capsule coffee machines, which solves the problems of unreliability and complex structure of existing self-locking mechanisms, making the structure of the self-locking mechanism simpler and improving its self-locking stability.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a self-locking mechanism for a capsule coffee machine, comprising a brewing body, a brewing head, and a brewing section. The brewing head is fixed to the front end of the brewing body, and the brewing section is slidably connected to the brewing body and can slide back and forth relative to the brewing head. The brewing body is also provided with a handle assembly and a linkage mechanism. The handle assembly includes a handle and a pull rod. The handle is rotatably connected to the brewing body. One end of the linkage mechanism is hinged to the brewing section, and the other end of the linkage mechanism is hinged to the rear end of the brewing body. Both ends of the pull rod are respectively hinged to the handle and the linkage mechanism. The handle drives the linkage mechanism to move through the pull rod so that the brewing section has a first working position close to the brewing head and a second working position away from the brewing head. The pull rod is provided with a first friction element, and the linkage mechanism is provided with a second friction element. When the brewing section is in the first working position, the first friction element and the second friction element separate. When the brewing section is in the second working position, the first friction element and the second friction element contact to generate frictional resistance to limit the movement of the brewing section.

[0005] After adopting the above technical solution, this utility model has the following advantages: By setting a first friction element on the pull rod and a second friction element on the linkage mechanism, when the brewing part is in the second working position, the first friction element and the second friction element contact and generate frictional resistance, thereby realizing the self-locking function. The first friction element and the second friction element are not easily affected by environmental vibration or external force, effectively preventing the brewing part from moving and improving the reliability of self-locking. Secondly, the traditional spring and other structures are eliminated, avoiding the problem of unreliable self-locking caused by spring fatigue failure. It also eliminates the complex structures such as spring preload adjustment and limit buckle. Therefore, the overall number of parts is reduced, the structure is simpler, and the assembly efficiency and later maintenance convenience are improved.

[0006] Furthermore, at least one of the first friction member and the second friction member is wedge-shaped. When the brewing part moves from the first working position to the second working position, the first friction member acts on the second friction member to generate frictional resistance to restrict the movement of the brewing part.

[0007] By employing the aforementioned technical solution, when the brewing unit moves from the first working position to the second working position, a contact fit is formed between the first friction component and the second friction component, generating gradually increasing pressure between their contact surfaces. This increases frictional resistance, enhances the self-locking effect, and allows the brewing unit to be stably locked in its current position. Simultaneously, during the movement, this friction fit structure also mitigates the impact force generated during the brewing unit's movement, providing buffering and stabilization, further improving the smoothness of the mechanism's operation and operational comfort.

[0008] Furthermore, the linkage mechanism includes a first link and a second link. One end of the first link is hinged to the brewing part, the other end of the first link is hinged to one end of the second link, the other end of the second link is hinged to the tail end of the brewing body, the middle part of the pull rod and the second link is hinged, and the second friction element is disposed on the second link. When the pull rod rotates back and forth relative to the second link, the first friction element and the second friction element contact or separate.

[0009] By adopting the aforementioned technical solution, the motion characteristics of the linkage mechanism are utilized to enable the friction component to automatically contact and generate frictional resistance when the brewing section moves to the target position, thereby achieving stable self-locking. In other stages, it remains in a separated state, without affecting the movement of the handle and linkage mechanism. This not only improves the reliability of the self-locking function, but also ensures the smoothness and convenience of operation.

[0010] Furthermore, the first friction element includes a friction surface disposed on the surface of the pull rod, the friction surface being in the shape of a concave platform, and the second friction element includes a mating protrusion disposed on the second connecting rod and disposed opposite to the friction surface, the mating protrusion being in the shape of an arc, used to form a wedge-shaped engagement with the friction surface when the pull rod rotates relative to the second connecting rod.

[0011] By employing the aforementioned technical solution, the geometric fit between the arc-shaped protrusion and the concave platform-shaped friction surface is utilized to achieve automatic bonding and generate gradually increasing positive pressure when the brewing section moves to the target position, thereby increasing frictional resistance and enhancing the self-locking effect.

[0012] Furthermore, the line connecting the hinge point of the second connecting rod and the brewing body to the vertical friction surface on the pull rod is the X-line, and the line connecting the hinge point of the second connecting rod and the brewing body to the center of the arc of the mating protrusion is the N-line. When the brewing part is in the second working position, the N-line is located below the X-line.

[0013] Through the above technical solution, when the N-line and X-line coincide, the apex of the mating protrusion contacts the friction surface, at which point the frictional resistance between them reaches its maximum. When the brewing section is in the second working position, the N-line is below the X-line, forming an angle between them. Due to the resistance of the brewing section to the linkage mechanism, the mating protrusion of the second linkage will not cross the X-line upwards without external force. Moreover, if the mating protrusion of the second linkage were to cross the X-line upwards, it would need to overcome significant frictional resistance. Therefore, the linkage mechanism will not unlock itself when the brewing section is in the second working position, the handle will not tilt forward, and the entire linkage mechanism will remain stably stationary in the second working position, thereby effectively ensuring the reliability and stability of the self-locking function.

[0014] Furthermore, the pull rod and the second connecting rod are respectively provided with a shaft hole and a rotating shaft. The pull rod and the second connecting rod are hinged by inserting the rotating shaft into the shaft hole. The pull rod is also provided with a limiting plate with the hinge point of the second connecting rod concentric. The second connecting rod is provided with a limiting rib that protrudes above the surface of the second connecting rod. When the brewing part moves between the first working position and the second working position, the limiting plate is always located between the limiting rib and the surface of the second connecting rod to prevent the rotating shaft from coming out of the shaft hole.

[0015] Through the above technical solution, during the movement of the brewing section between the first working position and the second working position, the limiting plate is always located between the limiting rib and the surface of the second connecting rod, which limits the axial displacement of the pull rod relative to the second connecting rod as much as possible, thereby improving the connection reliability of the hinge structure and enhancing the reliability of the whole machine operation.

[0016] Furthermore, the handle has two symmetrically arranged pull rods on both sides, and the second connecting rod has two symmetrically arranged second friction elements on both sides. The two pull rods are symmetrically connected to both sides of the second connecting rod. There are two first connecting rods, which are used to connect the two sides of the brewing section and the two sides of the second connecting rod.

[0017] Through the above technical solution, the structure uses two symmetrically arranged tie rods and two first connecting rods to distribute the force evenly on both sides, which avoids jamming or deviation caused by uneven force on one side as much as possible, and improves the smoothness of the mechanism's movement and the consistency of the operating feel. At the same time, the symmetrically arranged double friction parts on both sides of the second connecting rod generate frictional resistance when the brewing part reaches the target position, which enhances the stability and reliability of the self-locking action.

[0018] Furthermore, the handle rotates around the hinge point between the handle and the brewing body, and drives the lever to move through the hinge point. The handle has a gripping area for the user to hold, and the distance from the hinge point to the handle and the lever is less than the distance from the hinge point to the gripping area of ​​the handle.

[0019] By employing the aforementioned technical solution, and placing the fulcrum at the hinge between the handle and the brewing body, and ensuring that the distance from the fulcrum to the hinge point between the handle and the lever is less than the distance from the fulcrum to the gripping area, a force-saving lever relationship is created. This enhances the handle's driving capability over the linkage mechanism, allowing the user to obtain a larger output force with a smaller applied force during operation, thereby improving the stability and responsiveness of the brewing unit's opening and closing actions. This design not only reduces the difficulty of operation for users but also improves overall transmission efficiency and user comfort.

[0020] Furthermore, a guide rail, groove, or guide shaft is provided between the first and last ends of the brewing body, and the brewing part is slidably connected to the guide rail, groove, or guide shaft.

[0021] By using the above technical solution, by setting a guide rail, chute, or guide shaft between the head and tail ends of the brewing body, and sliding the brewing part on the guide rail, chute, or guide shaft, its movement path can be guided more precisely, ensuring that the movement of the brewing part between the first working position and the second working position is smooth and stable, and avoiding jamming caused by offset or poor coordination as much as possible.

[0022] Furthermore, the handle has a first resting position that fits against the brewing body, and a second resting position that is lifted upward relative to the brewing body. When the handle is in the first resting position, the brewing part is in a first working position, and when the handle is in the second resting position, the brewing part is in a second working position.

[0023] The above technical solution uses two distinct stopping positions of the handle to intuitively reflect the working position of the brewing unit, making it easy for users to identify and operate. When the handle is in the first position and is in close contact with the brewing body, the handle can be well integrated with the brewing body, thereby reducing the overall space occupied by the capsule coffee machine. Attached Figure Description

[0024] The present invention will be further described below with reference to the accompanying drawings:

[0025] Figure 1 This is a schematic diagram of the brewing section in the first working position of the self-locking mechanism of the capsule coffee machine of this utility model;

[0026] Figure 2 This is a schematic diagram of the brewing section in the second working position of the self-locking mechanism of the capsule coffee machine of this utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the second connecting rod of this utility model;

[0028] Figure 4 This is a schematic diagram of the structure of the pull rod of this utility model;

[0029] Figure 5 This is a schematic diagram of the installation of the tie rod and the second connecting rod of this utility model;

[0030] Figure 6 This is a schematic diagram of the structure of the pull rod and the second connecting rod when the brewing part of this utility model is in the first working position;

[0031] Figure 7 This is a schematic diagram of the structure of the pull rod and the second connecting rod when the brewing part of this utility model is in the second working position;

[0032] In the diagram, 10 is the main brewing body; 11 is the beginning; 12 is the end; 13 is the guide rail; 20 is the brewing head; 30 is the brewing part; 40 is the handle; 41 is the pull rod; 42 is the first friction element; 43 is the limiting plate; 44 is the fulcrum; 45 is point A; 50 is the first connecting rod; 51 is the second connecting rod; 52 is the second friction element; 53 is the limiting rib; 54 is point B; 60 is the rotating shaft; and 61 is the shaft hole. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments.

[0034] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein.

[0035] It should be understood that in the various embodiments of this utility model, the number of each process does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this utility model.

[0036] It should be understood that in this invention, "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product or device.

[0037] It should be understood that in this utility model, "multiple" refers to two or more. "And / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, X and / or Y can represent: X alone, X and Y simultaneously, or Y alone. The character " / " generally indicates that the preceding and following related objects are in an "or" relationship. "Contains X, Y, and Z", "Contains X, Y, and Z" means that all three X, Y, and Z are contained; "Contains X, Y, or Z" means that one of X, Y, and Z is contained; "Contains X, Y, and / or Z" means that any one, two, or three of X, Y, and Z are contained.

[0038] The technical solution of this utility model will be described in detail below with specific embodiments. The following specific embodiments can be selected to be combined or substituted with each other according to the actual situation, and the same or similar concepts or processes may not be described again in some embodiments.

[0039] like Figures 1 to 7As shown, this utility model provides a self-locking mechanism for a capsule coffee machine, including a brewing body 10, a brewing head 20, and a brewing section 30. The brewing head 20 is fixed to the front end 11 of the brewing body 10, and the brewing section 30 is slidably connected to the brewing body 10 and can slide back and forth relative to the brewing head 20. The brewing body 10 is also provided with a handle assembly and a linkage mechanism. The handle assembly includes a handle 40 and a pull rod 41. The handle 40 is rotatably connected to the brewing body 10, one end of the linkage mechanism is hinged to the brewing section 30, and the other end of the linkage mechanism is hinged to the rear end 12 of the brewing body 10. The two ends of 41 are respectively hinged to the handle 40 and the linkage mechanism. The handle 40 drives the linkage mechanism to move through the pull rod 41 so that the brewing part 30 has a first working position close to the brewing head 20 and a second working position away from the brewing head 20. The pull rod 41 is provided with a first friction element 42, and the linkage mechanism is provided with a second friction element 52. When the brewing part 30 is in the first working position, the first friction element 42 and the second friction element 52 are separated. When the brewing part 30 is in the second working position, the first friction element 42 and the second friction element 52 come into contact to generate frictional resistance to limit the movement of the brewing part 30.

[0040] By setting a first friction element 42 on the pull rod 41 and a second friction element 52 on the linkage mechanism, when the brewing part 30 is in the second working position, the first friction element 42 and the second friction element 52 come into contact and generate frictional resistance, thereby realizing the self-locking function. The first friction element 42 and the second friction element 52 are not easily affected by environmental vibration or external forces, effectively preventing the brewing part 30 from moving and improving the reliability of self-locking. Secondly, the traditional spring and other structures are eliminated, avoiding the problem of unreliable self-locking caused by spring fatigue failure. It also eliminates the need for complex structures such as spring preload adjustment and limit buckle. Therefore, the overall number of parts is reduced, the structure is simpler, and the assembly efficiency and later maintenance convenience are improved.

[0041] To make the brewing section 30 move more smoothly between the first working position and the second working position, a guide rail 13 is provided between the head end 11 and the tail end 12 of the brewing body 10. The brewing section 30 is slidably connected to the guide rail 13, which can guide its movement path more precisely, so as to ensure that the movement of the brewing section 30 between the first working position and the second working position is smooth and stable, and to avoid jamming caused by deviation or poor coordination as much as possible.

[0042] Preferably, the brewing body 10 may be provided with two guide rails 13 symmetrically on both sides, and the two sides of the brewing part 30 are slidably connected to the two guide rails 13 respectively, so that the two sides of the brewing part 30 are guided synchronously during the movement, which further improves the stability of the movement and the guiding accuracy.

[0043] It should be noted that the guide rail 13 is a linear guide rail. Linear guide rails have a simple structure and low frictional resistance, which helps to improve the smoothness of the opening and closing action of the brewing unit 30 and the feel of operation. Of course, in other embodiments, the brewing body can also be equipped with structures such as chutes and guide shafts to guide the movement of the brewing unit.

[0044] The linkage mechanism includes a first link 50 and a second link 51. One end of the first link 50 is hinged to the brewing section 30, and the other end of the first link 50 is hinged to one end of the second link 51. The other end of the second link 51 is hinged to the tail end 12 of the brewing body 10. The pull rod 41 and the middle part of the second link 51 are hinged together. A second friction element 52 is disposed on the second link 51. When the pull rod 41 rotates back and forth relative to the second link 51, the first friction element 42 and the second friction element 52 contact or separate. Utilizing the motion characteristics of the linkage mechanism, the friction elements automatically contact and generate frictional resistance when the brewing section 30 moves to the target position, thereby achieving stable self-locking. In other stages, they remain in a separated state, without affecting the movement of the handle 40 and the linkage mechanism. This not only improves the reliability of the self-locking function but also ensures the smoothness and convenience of operation.

[0045] To further enhance the reliability of the self-locking mechanism, two symmetrically arranged pull rods 41 are provided on both sides of the handle 40, and two symmetrically arranged second friction elements 52 are provided on both sides of the second connecting rod 51. The two pull rods 41 are symmetrically connected to both sides of the second connecting rod 51. There are two first connecting rods 50, which are used to connect both sides of the brewing section 30 and both sides of the second connecting rod 51. This ensures that the force is evenly distributed on both sides, minimizing the possibility of jamming or deviation caused by uneven force on one side, and improving the smoothness of the mechanism's movement and the consistency of the operating feel. At the same time, the symmetrically arranged double friction elements on both sides of the second connecting rod 51 generate frictional resistance simultaneously when the brewing section 30 reaches the target position, enhancing the stability and reliability of the self-locking action.

[0046] In existing technologies, the brewing section 30 typically only has a locking function in either the first or second working position. During movement between these positions, the self-locking structure is not fully effective, leaving the brewing section 30 at risk of movement or accidental slippage within this range. Therefore, in this application, at least one of the first friction element 42 and the second friction element 52 is wedge-shaped. When the brewing section 30 moves from the first working position to the second working position, the first friction element 42 acts on the second friction element 52 to generate frictional resistance, restricting the movement of the brewing section 30. This creates gradually increasing pressure between the contact surfaces, thereby increasing frictional resistance, enhancing the self-locking effect, and enabling the brewing section 30 to be stably locked in its current position. Simultaneously, during movement, this friction-fitting structure also mitigates the impact force generated during the movement of the brewing section 30, providing cushioning and stabilization, further improving the smoothness of the mechanism's operation and operational comfort.

[0047] Specifically, the first friction element 42 includes a friction surface on the surface of the pull rod 41, which is in the shape of a concave platform. The second friction element 52 includes a mating protrusion on the second connecting rod 51 and opposite to the friction surface. The mating protrusion is arc-shaped and is used to form a wedge-shaped engagement with the friction surface when the pull rod 41 rotates relative to the second connecting rod 51. By utilizing the geometric fit between the arc-shaped protrusion and the concave platform-shaped friction surface, automatic engagement and gradually increasing positive pressure are achieved when the brewing section 30 moves to the target position, thereby increasing frictional resistance and enhancing the self-locking effect.

[0048] It should be noted that the first friction element 42 has symmetrical friction surfaces on both sides, so that during the rotation of the pull rod 41 relative to the second connecting rod 51, no matter which direction the handle 40 is operated, it can ensure that it is in contact with the second friction element 52 and generate stable frictional resistance.

[0049] To further enhance the reliability of the self-locking mechanism, the line connecting the hinge point of the second link 51 and the brewing body 10 to the vertical friction surface on the pull rod 41 is the X-line, and the line connecting the hinge point of the second link 51 and the brewing body 10 to the center of the arc of the mating protrusion is the N-line. When the N-line and the X-line coincide, the apex of the arc of the mating protrusion contacts the friction surface, and the frictional resistance between them reaches its maximum. When the brewing part 30 is in the second working position, the N-line is below the X-line, and the N-line and the X-line form an angle α. Since the brewing part 30 provides resistance to the linkage mechanism, the mating protrusion of the second link 51 will not cross the X-line upwards without external force. Moreover, the mating protrusion of the second link 51 needs to overcome a large frictional resistance to cross the X-line upwards. Therefore, the linkage mechanism will not unlock itself when the brewing part 30 is in the second working position, the handle 40 will not tilt forward, and the entire linkage mechanism will be stably stationed in the second working position, thereby effectively ensuring the reliability and stability of the self-locking function.

[0050] The tie rod 41 and the second connecting rod 51 are respectively provided with a shaft hole 61 and a rotating shaft 60. The tie rod 41 and the second connecting rod 51 are hinged by inserting the rotating shaft 60 into the shaft hole 61. The tie rod 41 is also provided with a limiting plate 43 with the hinge point of the second connecting rod 51 concentric. The second connecting rod 51 is provided with a limiting rib 53 that protrudes above the surface of the second connecting rod 51. The direction of the limiting rib 53 protruding above the surface of the second connecting rod 51 is the same as the direction in which the rotating shaft 60 disengages from the shaft hole 61. When the brewing unit 30 moves between the first working position and the second working position, the limiting plate 43 is always located between the limiting rib 53 and the surface of the second connecting rod 51 to restrict the rotating shaft 60 from disengaging from the shaft hole 61, thereby improving the connection reliability of the hinge structure and enhancing the reliability of the whole machine operation.

[0051] It should be noted that one end of the limiting plate 43 is point A 45, and one end of the limiting rib 53 is point B 54. During assembly, point A 45 is lower than point B 54. Then, the rotating shaft 60 is inserted into the shaft hole 61 to achieve the hinge connection between the pull rod 41 and the second connecting rod 51. When the pull rod 41 is rotated, when point A 45 is higher than point B 54, the limiting rib 53 blocks the limiting plate 43, preventing the rotating shaft 60 from coming out of the shaft hole 61 as much as possible.

[0052] In existing spring-locking solutions, users typically need to exert significant force to overcome the spring's elasticity and complete the self-locking action of the brewing unit 30, increasing operational difficulty. Therefore, in this application, the handle 40 rotates around the hinge point between the handle 40 and the brewing body 10 as a fulcrum 44, driving the pull rod 41 through the fulcrum 44. The handle 40 has a gripping area for the user, and the distance from the fulcrum 44 to the hinge point between the handle 40 and the pull rod 41 is less than the distance from the fulcrum 44 to the gripping area of ​​the handle 40. This creates a force-saving lever relationship, enhancing the handle 40's driving capability on the linkage mechanism, allowing the user to obtain a larger output force with a smaller applied force, thereby improving the stability and responsiveness of the opening and closing action of the brewing unit 30. This design not only reduces the user's operational difficulty but also improves overall transmission efficiency and user comfort.

[0053] It should be noted that the brewing body 10 has a cavity, and the brewing unit 30 is located inside the cavity. Users often find it difficult to visually determine the position of the brewing unit 30. Therefore, in this application, the handle 40 has a first resting position that is in contact with the brewing body 10, and a second resting position that is raised relative to the brewing body 10. When the handle 40 is in the first resting position, the brewing unit 30 is in the first working position; when the handle 40 is in the second resting position, the brewing unit 30 is in the second working position. These two clearly defined resting states of the handle 40 visually reflect the working position of the brewing unit 30, facilitating user identification and operation. When the handle 40 is in the first position and in contact with the brewing body 10, it integrates well with the brewing body 10, thereby reducing the overall space occupied by the capsule coffee machine.

[0054] When using, such as Figure 1 , Figure 2 Lift the handle 40 upward and rotate it clockwise. The handle 40 drives the pull rod 41 to move downward. The pull rod 41 drives the second link 51 to rotate counterclockwise. Driven by the second link 51, the first link 50 pulls the brewing part 30 to slide backward along the guide rail 13.

[0055] like Figure 2 , Figure 5 When the handle 40 is in the required design position, the first friction element 42 of the pull rod 41 slides in contact with the second friction element 52 of the second connecting rod 51. For example... Figure 7When the external force drives the second link 51 to continue rotating counterclockwise, the N line and the X line form an angle α, that is, the second friction element 52 of the second link 51 passes the vertical straight point downwards. At this time, the second friction element 52 gradually moves away from the first friction element 42.

[0056] When the N-line coincides with the X-line, that is, when the apex (highest point) of the second friction element 52 contacts the first friction element 42, the friction between the second friction element 52 and the first friction element 42 is at its maximum.

[0057] like Figure 1 , Figure 2 , Figure 5 Because the brewing section 30 has resistance to the linkage mechanism, the second friction element 52 of the second linkage 51 will not cross the X-ray upwards without external force and will not unlock itself. Therefore, the handle 40 will not tilt forward and the entire device will remain in the current position.

[0058] like Figure 1 and Figure 6 When the handle 40 is pressed down, the second friction element 52 of the second linkage 51 moves upward past the X-ray and unlocks itself.

[0059] Understandably, in other embodiments, both the first and second friction components can be friction blocks, and the modular design facilitates production and assembly.

[0060] In addition to the preferred embodiments described above, there are other embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection claimed by this utility model.

Claims

1. A self-locking mechanism for a capsule coffee machine, comprising a brewing body (10), a brewing head (20), and a brewing section (30), wherein the brewing head (20) is fixed to the head end (11) of the brewing body (10), and the brewing section (30) is slidably connected to the brewing body (10) and can slide back and forth relative to the brewing head (20), characterized in that, The brewing body (10) is also provided with a handle assembly and a linkage mechanism. The handle assembly includes a handle (40) and a pull rod (41). The handle (40) is rotatably connected to the brewing body (10). One end of the linkage mechanism is hinged to the brewing part (30), and the other end of the linkage mechanism is hinged to the tail end (12) of the brewing body (10). Both ends of the pull rod (41) are respectively hinged to the handle (40) and the linkage mechanism. The handle (40) drives the linkage mechanism to move through the pull rod (41) so that the brewing part (30) can move. The brewing part (30) has a first working position close to the brewing head (20) and a second working position away from the brewing head (20). The pull rod (41) is provided with a first friction element (42), and the linkage mechanism is provided with a second friction element (52). When the brewing part (30) is in the first working position, the first friction element (42) and the second friction element (52) are separated. When the brewing part (30) is in the second working position, the first friction element (42) and the second friction element (52) come into contact to generate frictional resistance to limit the movement of the brewing part (30).

2. The self-locking mechanism of the capsule coffee machine according to claim 1, characterized in that, At least one of the first friction member (42) and the second friction member (52) is wedge-shaped. When the brewing part (30) moves from the first working position to the second working position, the first friction member (42) acts on the second friction member (52) to generate frictional resistance to limit the movement of the brewing part (30).

3. The self-locking mechanism of the capsule coffee machine according to claim 1, characterized in that, The linkage mechanism includes a first link (50) and a second link (51). One end of the first link (50) is hinged to the brewing part (30), and the other end of the first link (50) is hinged to one end of the second link (51). The other end of the second link (51) is hinged to the tail end (12) of the brewing body (10). The middle part of the pull rod (41) and the second link (51) is hinged. The second friction element (52) is disposed on the second link (51). When the pull rod (41) rotates back and forth relative to the second link (51), the first friction element (42) and the second friction element (52) contact or separate.

4. The self-locking mechanism of the capsule coffee machine according to claim 3, characterized in that, The first friction element (42) includes a friction surface disposed on the surface of the pull rod (41), the friction surface being concave and truncated. The second friction element (52) includes a mating protrusion disposed on the second connecting rod (51) and disposed opposite to the friction surface, the mating protrusion being arc-shaped and used to form a wedge-shaped fit with the friction surface when the pull rod (41) rotates relative to the second connecting rod (51).

5. The self-locking mechanism of the capsule coffee machine according to claim 4, characterized in that, The line connecting the hinge point of the second connecting rod (51) and the brewing body (10) and the vertical friction surface on the pull rod (41) is the X-line, and the line connecting the hinge point of the second connecting rod (51) and the brewing body (10) and the center of the arc of the mating protrusion is the N-line. When the brewing part (30) is in the second working position, the N-line is located below the X-line.

6. The self-locking mechanism of the capsule coffee machine according to claim 3, characterized in that, The pull rod (41) and the second connecting rod (51) are respectively provided with a shaft hole (61) and a rotating shaft (60). The pull rod (41) and the second connecting rod (51) are hinged by inserting the rotating shaft (60) into the shaft hole (61). The pull rod (41) is also provided with a limiting plate (43) with the hinge point of the second connecting rod (51) being concentric. The second connecting rod (51) is provided with a limiting rib (53) that protrudes above the surface of the second connecting rod (51). When the brewing part (30) moves between the first working position and the second working position, the limiting plate (43) is always located between the limiting rib (53) and the surface of the second connecting rod (51) to prevent the rotating shaft (60) from coming out of the shaft hole (61).

7. The self-locking mechanism of the capsule coffee machine according to claim 3, characterized in that, The handle (40) has two symmetrically arranged pull rods (41) on both sides, and the second connecting rod (51) has two symmetrically arranged second friction elements (52) on both sides. The two pull rods (41) are symmetrically connected to the two sides of the second connecting rod (51). There are two first connecting rods (50), and the two first connecting rods (50) are used to connect the two sides of the brewing part (30) and the two sides of the second connecting rod (51).

8. The self-locking mechanism of the capsule coffee machine according to claim 1, characterized in that, The handle (40) rotates around the hinge point (44) between the handle (40) and the brewing body (10), and drives the pull rod (41) to move through the hinge point (44). The handle (40) has a gripping area for the user to hold. The distance from the hinge point (44) to the hinge point between the handle (40) and the pull rod (41) is less than the distance from the hinge point (44) to the gripping area of ​​the handle (40).

9. The self-locking mechanism of the capsule coffee machine according to claim 1, characterized in that, A guide rail (13), a groove, or a guide shaft is provided between the first end (11) and the last end (12) of the brewing body (10), and the brewing part (30) is slidably connected to the guide rail (13), the groove, or the guide shaft.

10. The self-locking mechanism of the capsule coffee machine according to claim 1, characterized in that, The handle (40) has a first resting position that fits against the brewing body (10) and a second resting position that is raised relative to the brewing body (10). When the handle (40) is in the first resting position, the brewing part (30) is in the first working position. When the handle (40) is in the second resting position, the brewing part (30) is in the second working position.

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