Capsule-based beverage extraction device

Abstract

The present invention relates to a beverage extraction device based on capsules, comprising a housing, a first mechanism, a second mechanism and a capsule clip, wherein the first mechanism has a accommodating cavity for accommodating capsules, the second mechanism can move forward and backward relative to the first mechanism, there are two capsule clips, the front end of the capsule clip has a package-releasing groove bent inward for hooking the annular edge of the capsule, the capsule clip is provided with a guide hole arranged along the front-to-back direction, and the left and right sides of the second mechanism have pull-plate hooks; the characteristic is that: the left and right sides of the second mechanism are provided with elastic members acting on the capsule clip, when the second mechanism moves forward to a closing position with the first mechanism, the front end of the capsule clip opens, and the elastic member is compressed by the capsule clip; when the second mechanism moves backward from the closing position, the capsule clip has a tendency to move forward relative to the pull-plate hook under the action of the elastic member. Under the action of the elastic force, the capsule clip produces a delayed movement effect and will not move closely with the second mechanism.

Description

Technical Field

[0001] The invention relates to a beverage extraction device based on capsules. The extracted beverage can be coffee, tea, milk or other beverages. Background Art

[0002] The coffee machine is a kind of beverage extraction device. In order to facilitate operation, the existing coffee machines have the function of automatically removing the capsule. Most of the coffee machines are provided with an opening and closing structure for clamping the capsule and opening and closing to make way for automatic removal of the capsule. The function of the clamp is mainly to clamp the capsule during packaging. The opening and closing structure is mainly to open and make way after the beverage package partially enters the accommodating cavity, and after the extraction is completed and returned to its original position, the clamp is closed and waits for the next packaging.

[0003] The applicant invented a splint opening and closing structure for a beverage extraction device that can drive the splint to open and close without using an axis groove matching structure. The Chinese invention patent with patent number ZL201410072514.8 (publication number CN103948318B) is "A splint and an opening and closing structure with the splint", which includes a fixed mechanism, a movable mechanism located at the rear of the fixed mechanism and capable of moving forward and backward, the fixed mechanism having a receiving cavity for accommodating capsules with annular edges, two splints, which are respectively arranged on the left and right sides of the movable mechanism and can open and close left and right, the front end of the splint has a hook portion bent inwardly for hooking the annular edge of the capsule and dragging the capsule out, the hook portion has a front outer surface, and the splint is provided with a guide hole arranged along the front and rear directions. The blocking part is located in front of the front end face of the moving part; the moving part has hook parts on the left and right sides, the hook parts are located in the guide hole and can slide forward and backward relative to the guide hole, and the front outer end face of the hook part and the front inner end face of the guide hole form a first contact fit, and the first contact fit can apply an inward thrust to the front inner end face of the guide hole; the rear hook face of the hook part and the rear inner end face of the guide hole form a second contact fit, and the second contact fit applies the said backward thrust to the rear inner end face of the guide hole.

[0004] At present, in the field of coffee machine industry, a good brewing system plays a vital role in judging the function of a coffee machine. The quality of a brewing system mainly depends on whether the internal structure design is good and simple, and whether the whole process of capsule extraction and recovery is smooth. Nowadays, the brewing system widely adopts the mutual cooperation between the capsule clamp and the sealed cavity to realize the process from capsule entering the system to coffee extraction and then to capsule recovery. The key point of this design is that the cooperation between the capsule clamp and the sealed cavity can be firm and stable, and effectively make the whole process of coffee extraction simple and comfortable for users. The existing coffee machine brewing system capsule clamp is simply attached to the sealed cavity, and relies on the movement of the sealed cavity to drive it to move back and forth.

[0005] With the existing cooperation mode of the capsule clamp and the sealing chamber, after the coffee is extracted, when the sealing chamber retracts and drives the capsule clamp to pull back the capsule, the clamp (also called capsule clamp) may stick to the hooks on both sides of the moving mechanism due to coffee oil or other factors, and the capsule clamp will move backward closely following the moving mechanism, causing the capsule clamp to fail to return to the specified position in time and pull the capsule back. Because the piercing needle pierces the capsule, under the action of the friction between the piercing needle and the capsule, if the capsule clamp moves backward synchronously with the moving mechanism, the capsule will move forward together with the moving mechanism, resulting in the risk of the capsule not being able to fall off the moving mechanism normally. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a capsule-based beverage extraction device in response to the above-mentioned existing technical status, which can further ensure that the capsule can be smoothly pulled out of the accommodating cavity of the first part and will not stick to the second part and cannot fall off, that is, when pulling back the capsule, it can be ensured that the capsule clamp is accurately returned to the designated position.

[0007] The technical solution adopted by the present invention to solve the above technical problems is: a beverage extraction device based on capsules, including a shell, and a first mechanism, a second mechanism and a capsule clamp arranged in the shell, the first mechanism has a accommodating cavity for accommodating capsules, the second mechanism is located at the rear of the first mechanism and can move forward and backward relative to the first mechanism, the capsule clamp has two, which are respectively located on the left and right sides of the second mechanism and can be opened and closed left and right, the front end of the capsule clamp has an inwardly bent groove for hooking the annular edge of the capsule and dragging the capsule out of the accommodating cavity, the escaping groove is located at the first mechanism, and the second mechanism is located at the rear of the first mechanism and can move forward and backward relative to the first mechanism. In front of the second part, a guide hole arranged along the front-to-back direction is opened on the capsule clamp, and the left and right sides of the second part are provided with pull-plate hook parts, which can enter the guide hole and can slide forward and backward relative to the guide hole; it is characterized in that: the left and right sides of the second part are provided with elastic parts acting on the capsule clamp, when the second part moves forward to the closing position with the first part, the front end of the capsule clamp is opened, and the elastic part is compressed by the capsule clamp; when the second part moves backward from the closing position, the capsule clamp has a tendency to move forward relative to the pull-plate hook part under the action of the elastic part.

[0008] As a further improvement, the rear inner end surface of the guide hole is an inclined surface that matches the inner surface of the pull plate hook portion and gradually tilts inward from the rear to the front. In this way, when the pull plate hook portion contacts the rear inner end surface of the guide hole and continues to move backward, it will cause the front end of the capsule clamp to deflect in the closing direction, so that when the second mechanism retreats, the capsule clamp always maintains the tendency to clamp the annular edge of the beverage package, which better ensures that the hook portion can smoothly hook out the beverage package and make the package removal proceed smoothly.

[0009] As a further improvement, the front end of the capsule clamp also has an inner bend for holding the capsule between the two capsule clamps and located in front of the second mechanism. The capsule clamp also has the function of restraining the capsule, and there is no need to set an additional capsule holding structure at the front of the second mechanism.

[0010] In order to better hold the capsule, the above-mentioned holding position is a placement groove for the annular edge of the capsule to be inserted, and the bottom of the placement groove forms a blocking portion for the annular edge of the capsule. The placement groove can better restrain the capsule

[0011] Preferably, the retaining position is located in front of the stripping groove. When delivering the capsule, the stripping groove is located at the rear and will not contact the first mechanism first. When pulling the capsule, the stripping groove will first contact the annular edge of the capsule, and the retaining position will not contact the capsule. The order of sequential contact is more reasonable.

[0012] As a further improvement, the left and right sides of the first mechanism have guide surfaces for guiding and cooperating with the front outer surface of the capsule clip; when the capsule clip moves forward under the action of external force until it contacts the guide surfaces and then continues to move forward, the guide surfaces will exert an outward thrust on the front end of the capsule clip, forcing the capsule clip to move outward along the guide surfaces and be in an open and yielding state. The provision of the guide surfaces can more easily ensure that the front end of the capsule clip is opened and yielded.

[0013] In order to facilitate the placement of the elastic member, the second member is provided with elastic member placement grooves on both sides, and the capsule clip is provided with an insert that is inserted into the elastic member placement groove, and the elastic member is placed in the elastic member placement groove and one end of the elastic member rests on the insert. At the same time, the cooperation between the insert and the elastic member placement groove also has a restraining effect on the capsule clip.

[0014] In order to further ensure that the capsule holder moves along a preset track, the inner side wall of the shell is formed with a restraining groove in which the capsule holder is placed and can slide relatively.

[0015] In order to further ensure that the capsule clip can accurately return to the designated position when the capsule is pulled back, a friction plate made of silicone material is embedded in the capsule clip, and the friction plate contacts the side wall of the constraint groove. The setting of the friction plate increases the friction between the capsule clip and the shell, which can cause a speed difference between the capsule clip and the second mechanism, further preventing the capsule clip from being unable to accurately return to the position due to the synchronous backward movement of the second mechanism during the process of pulling back the capsule.

[0016] In order to further ensure that the capsule clip can accurately return to the designated position when the capsule is pulled back, the rear end of the capsule clip is provided with two elastic sheets spaced apart from each other, and the elastic sheets are in contact with the inner top wall and the inner bottom wall of the constraint groove. The provision of the elastic sheets increases the friction between the capsule clip and the shell, and can cause a speed difference between the capsule clip and the second mechanism in sliding, further preventing the problem that the capsule clip cannot accurately return to its position due to the synchronous backward movement of the second mechanism in the process of pulling back the capsule.

[0017] Compared with the prior art, the advantage of the present invention is that an elastic member is added between the second mechanism and the capsule clamp, and when brewing coffee, the elastic member is in a compressed state, and when the handle is opened after the coffee is extracted, the elastic member on the second mechanism changes from a compressed state to a relaxed state when the second mechanism is retracted, and the process of the elastic member changing from compression to relaxation will generate an elastic force acting on the capsule clamp, so that the capsule clamp can be separated from the pull plate hook portion under the action of the elastic force even if the capsule clamp and the pull plate hook portion are stuck by the fat liquid, thereby producing a delayed movement effect, and will not move closely with the second mechanism, that is, when the second mechanism just starts to move backward, the rear wall of the package removal groove will press the annular edge of the capsule forward to ensure that the capsule is separated from the second mechanism in time, and only after the pull plate hook portion hooks the rear inner end face of the guide hole can the capsule clamp be driven to move backward with the second mechanism, and at this time the capsule clamp can already return to its designated position, ensuring that the front wall of the pull bag hook groove hooks the capsule, and the capsule is smoothly pulled out of the accommodating cavity and falls out. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of this embodiment;

[0019] Figure 2 Schematic diagram of the relative position relationship between the two parts of this embodiment (state of waiting for capsule loading);

[0020] Figure 3 Schematic diagram of the relative position relationship between the two parts of this embodiment (capsule loading state);

[0021] Figure 4 is a cross-sectional view of the relative position relationship between the two parts of this embodiment (the capsule is ready to be loaded);

[0022] Figure 5 Schematic diagram of the relative position relationship between the two parts of this embodiment (capsule delivery state);

[0023] Figure 6 Schematic diagram of the relative position relationship between the two parts of this embodiment (capsule is fully fed into the extraction state);

[0024] Figure 7 A cross-sectional view showing the relative position relationship of the two parts of this embodiment (capsule is fully delivered into the extraction state);

[0025] Figure 8Schematic diagram of the relative position relationship between the two parts of this embodiment (the second part has just moved backward, and the elastic part acts on the capsule clamp to move forward);

[0026] Fig. 9 A cross-sectional view of the relative positional relationship between the two parts of this embodiment (the second part has just moved backwards, and the elastic member acts on the capsule clamp to move forward);

[0027] Fig.10 Schematic diagram of the relative position relationship between the two parts of this embodiment (the state of pulling the capsule clip out of the accommodating cavity);

[0028] Fig.11 is a three-dimensional schematic diagram of the housing in this embodiment;

[0029] Fig.12 Schematic diagram of the second mechanism in this embodiment Figure 1 ;

[0030] Fig.13 The three-dimensional diagram of the capsule clip in this embodiment Figure 1 ;

[0031] Fig.14 The three-dimensional diagram of the capsule clip in this embodiment Figure 2 . DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings.

[0033] like Figures 1 to 14 Shown is a preferred embodiment of the present invention.

[0034] A beverage extraction device based on capsules comprises a shell 1, and a first mechanism 2, a second mechanism 3 and a capsule holder 5 arranged in the shell 1. The capsule holder 5 is roughly in the shape of a flat plate. The first mechanism 2 has a receiving cavity 21 for accommodating capsules 4. The inner wall of the receiving cavity 21 is provided with a plurality of convex ribs spaced along the circumference to prevent the capsules from sticking. The second mechanism 3 is located at the rear of the first mechanism 2 and can move forward and backward relative to the first mechanism 2. The second mechanism 3 is provided with a needle 8. In this embodiment, the first mechanism 2 is fixed at the front of the shell. Of course, the first mechanism 2 and the second mechanism 3 can also move relatively. The applicant has other patents with similar structures. There are two capsule clips 5, which are respectively located on the left and right sides of the second machine part 3 and can be opened and closed left and right. The front end of the capsule clip 5 has an inwardly bent escape groove 51 for hooking the annular edge 41 of the capsule 4 and dragging the capsule 4 out of the accommodating chamber 21. The escape groove 51 has a front wall 511 and a rear wall 512. The front wall 511 is used to hook the annular edge 41 of the capsule 4, and the rear wall 512 is used to press the annular edge 41 of the capsule 4. The escape groove 51 is located in front of the second machine part 3. A guide hole 52 arranged along the front and rear directions is opened on the capsule clip 5. The left and right sides of the second machine part 3 have pull plate hook portions 31. The pull plate hook portions 31 can enter the guide hole 52 and can slide back and forth relative to the guide hole 52.

[0035] An important improvement of the present invention is that elastic members 6 acting on the capsule clamp 5 are provided on both the left and right sides of the second mechanism 3. The elastic member 6 in this embodiment is a spring. When the second mechanism 3 moves forward to a closed position with the first mechanism 2, the front end of the capsule clamp 5 opens and the elastic member 6 is compressed by the capsule clamp 5. When the second mechanism 3 moves backward from the closed position, the capsule clamp 5 has a tendency to move forward relative to the pull plate hook 31 under the action of the elastic member 6.

[0036] The rear inner end surface 521 of the guide hole 52 is a slope that matches with the inner surface of the pull plate hook portion 31 and gradually slopes inward from the rear to the front.

[0037] The front end of the capsule clamp 5 also has an inner bend for holding the capsule 4 between the two capsule clamps 5 and a holding position 53 located in front of the second mechanism 3 .

[0038] The holding position 53 is a placement groove for inserting the annular edge 41 of the capsule 4, and the bottom of the placement groove forms a stopper 531 for blocking the annular edge 41 of the capsule 4. The holding position 53 is located in front of the stripping groove 51.

[0039] The left and right sides of the first mechanism 2 have guide surfaces 22 for guiding and cooperating with the front outer surface 54 of the capsule clip 5; when the capsule clip 5 moves forward under the action of external force until it contacts the guide surface 22 and then continues to move forward, the guide surface 22 will apply an outward thrust to the front end of the capsule clip 5, forcing the capsule clip 5 to move outward along the guide surface 22 and be in an open and yielding state.

[0040] Elastic member placement grooves 32 are provided on the left and right sides of the second mechanism 3 . The capsule holder 5 has an inserting piece 55 inserted into the elastic member 6 placement groove. The elastic member 6 is placed in the elastic member placement groove 32 and one end of the elastic member 6 abuts against the inserting piece 55 .

[0041] The inner wall of the housing 1 is formed with a restraining groove 11 in which the capsule holder 5 is placed and can slide relatively. A friction plate 7 made of silicone material is embedded in the capsule holder 5, and the friction plate 7 contacts the side wall of the restraining groove 11. The rear end of the capsule holder 5 is provided with two elastic plates 56 spaced apart from each other, and the elastic plates 56 contact the inner top wall and inner bottom wall of the restraining groove 11.

[0042] like Figure 2 , 4 As shown, when the first part 2 and the second part 3 are fully opened, the two clamps 5 are in a closed state and can clamp the capsule 4, and the capsule 4 is placed in the holding position 53 and located in front of the second part 3.

[0043] like Figure 5 As shown, when the second member 3 moves forward to a state where the capsule 4 is partially located in the accommodating cavity 21 , the front outer surface 54 of the capsule holder 5 just contacts the guide surface 22 .

[0044] like Figure 6 , 7 As shown, the second mechanism 2 continues to move forward, and the guide surface 22 exerts an outward thrust on the front end of the capsule clip 5, forcing the front ends of the two capsule clips 5 to open outward to make way, so as to ensure that the capsule 4 is released from the holding position 53 and further pushed into the accommodating chamber 21. Until the second mechanism 3 moves forward to the closing position with the first mechanism 2, the elastic member 6 is compressed by the capsule clip 5, and the annular edge 41 of the capsule 4 is approximately located in the escape groove 51.

[0045] like Figure 8 , 9 As shown in Figures 10, after the extraction is completed, the second machine part 3 moves backward, the pull plate hook part 31 moves backward relative to the guide hole 52, the elastic member 6 changes from a compressed state to a relaxed state, the capsule clamp 5 moves forward relative to the second machine part 3, and the rear wall 512 of the package-release groove 51 keeps pressing the annular edge 41 of the capsule 4, so as to separate the capsule 4 from the pricking needle of the second machine part 3. After the pull plate hook part 31 contacts the rear inner end surface 521 of the guide hole 52, a backward thrust is applied to the capsule clamp 5, and the further backward movement of the second machine part 3 drives the package-release grooves 51 on the two capsule clamps 5 to move backward, and the front wall 511 of the package-release hook groove 51 brings the capsule 4 out of the accommodating chamber 21 to complete the package release.

[0046] During this process, the elastic member 6 will generate an elastic force acting on the capsule clamp 5 from compression to relaxation, so that under the action of the elastic force, the capsule clamp 5 can be separated from the pull plate hook portion 31 even if the capsule clamp 5 and the pull plate hook portion 31 are stuck by the fat liquid, resulting in a delayed movement effect, and will not move closely with the second mechanism 3. That is, when the second mechanism 3 just starts to move backward, the rear wall 512 of the unpacking groove 51 will press the annular edge 41 of the capsule 4 forward to ensure that the capsule 4 is separated from the second mechanism 3 in time. Only after the pull plate hook portion 31 hooks the rear inner end face 521 of the guide hole 52, can it drive the capsule clamp 5 to move backward with the second mechanism 3, so that the capsule clamp 5 can return to the specified position, ensuring that the front wall 511 of the unpacking groove 51 hooks the capsule 4, and the capsule 4 is smoothly pulled out of the accommodating cavity and falls.

[0047] It should be noted that in the description of this embodiment, the terms "front, back", "left, right", "up, down", etc. indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

Claims

1. A beverage extraction device based on a capsule, comprising a housing (1), and a first mechanism (2), a second mechanism (3) and a capsule holder (5) arranged in the housing (1), wherein the first mechanism (2) has a receiving cavity (21) for receiving a capsule (4), the second mechanism (3) is located at the rear of the first mechanism (2) and can move forward and backward relative to the first mechanism (2), the capsule holder (5) has two portions, which are located at the left and right sides of the second mechanism (3) and can be opened and closed left and right, and the front of the capsule holder (5) is The end of the second mechanism (3) has an inwardly bent annular edge (41) for hooking the capsule (4) and pulling the capsule (4) out of the accommodating cavity (21) into a package-ejecting groove (51), the package-ejecting groove (51) is located in front of the second mechanism (3), the capsule clamp (5) is provided with a guide hole (52) arranged in the front-to-back direction, the left and right sides of the second mechanism (3) are provided with a pull plate hook portion (31), the pull plate hook portion (31) can enter the guide hole (52) and can slide forward and backward relative to the guide hole (52); the characteristics are: The left and right sides of the second machine part (3) are both provided with elastic parts (6) acting on the capsule clamp (5). When the second machine part (3) moves forward to a closed position with the first machine part (2), the front end of the capsule clamp (5) opens and the elastic part (6) is compressed by the capsule clamp (5). When the second machine part (3) moves backward from the closed position, the capsule clamp (5) has a tendency to move forward relative to the pull plate hook part (31) under the action of the elastic part (6), so that the capsule clamp (5) can be separated from the pull plate hook part (31) by the action of the elastic force even if the capsule clamp (5) and the pull plate hook part (31) are stuck by the fat liquid. (31) is disengaged, producing a delayed movement effect, and will not move closely with the second mechanism (3); the second mechanism (3) is provided with elastic member placement grooves (32) on the left and right sides, and the capsule clip (5) has an insert (55) inserted into the elastic member (6) placement groove, and the elastic member (6) is placed in the elastic member placement groove (32) and one end of the elastic member (6) is against the insert (55); the rear inner end surface (521) of the guide hole (52) is an inclined surface that gradually tilts inward from the back to the front and cooperates with the inner surface of the pull plate hook (31).

2. The capsule-based beverage extraction device according to claim 1, characterized in that: The front end of the capsule clamp (5) also has an inner bend for holding the capsule (4) between the two capsule clamps (5) and a holding position (53) located in front of the second mechanism (3).

3. The capsule-based beverage extraction device according to claim 2, characterized in that: The retaining position (53) is a placement groove for the annular edge (41) of the capsule (4) to be inserted, and the bottom of the placement groove forms a blocking portion (531) that blocks the annular edge (41) of the capsule (4).

4. The capsule-based beverage extraction device according to claim 2, characterized in that: The holding position (53) is located in front of the package stripping groove (51).

5. The capsule-based beverage extraction device according to claim 1, characterized in that: The left and right sides of the first mechanism (2) are provided with guide surfaces (22) for guiding and cooperating with the front outer surface (54) of the capsule holder (5); when the capsule holder (5) moves forward under the action of an external force until it contacts the guide surface (22) and then continues to move forward, the guide surface (22) will exert an outward thrust on the front end of the capsule holder (5), forcing the capsule holder (5) to move outward along the guide surface (22) and be in an open and yielding state.

6. The capsule-based beverage extraction device according to any one of claims 1 to 5, characterized in that: The inner side wall of the housing (1) is formed with a restraining groove (11) in which the capsule holder (5) is placed and can slide relatively.

7. The capsule-based beverage extraction device according to claim 6, characterized in that: The capsule clip (5) is embedded with a friction plate (7) made of silicone material, and the friction plate (7) is in contact with the side wall of the restraining groove (11).

8. The capsule-based beverage extraction device according to claim 6, characterized in that: The rear end of the capsule holder (5) is provided with two elastic sheets (56) spaced apart from each other in an upper and lower direction, and the elastic sheets (56) are in contact with the inner top wall and the inner bottom wall of the restraining groove (11).

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