Automatic bag falling mechanism of beverage preparation equipment and beverage preparation equipment applying automatic bag falling mechanism

Abstract

The invention discloses an automatic bag falling mechanism and beverage preparation equipment applying the automatic bag falling mechanism, the automatic bag falling mechanism comprises a machine base, a first machine part and a second machine part, the first machine part and the second machine part are arranged in the machine base, and the first machine part can be relatively close to or far away from the second machine part; the first machine part and the second machine part are close to each other and closed to form a brewing cavity capable of containing a paper bag, a paper bag bracket capable of supporting the paper bag from the bottom when the paper bag is placed into the beverage preparation equipment is further arranged, a bag supporting groove used for supporting the paper bag is formed in the paper bag bracket, and the shape of the bag supporting groove is matched with the bottom of a pressed powder of the paper bag. And the bottom surface of the bag supporting groove is provided with an avoiding slot for avoiding the skirt edge of the paper bag. The circular arc at the bottom of the paper-wrapped pressed powder is specially selected as a positioning point, so that the shape of the bag supporting groove is correspondingly matched with the bottom of the paper-wrapped pressed powder, and the unique invariable pressed powder bottom indentation circular arc is used for fixing, so that the universality limitation caused by the difference of the skirt edges of the paper-wrapped pressed powder is skillfully avoided.

Description

Technical Field

[0001] The invention relates to the field of beverage preparation, and in particular to an automatic package-switching mechanism for beverage preparation equipment and beverage preparation equipment using the automatic package-switching mechanism. Background Art

[0002] In order to achieve the effect of automatic detachment of paper bags after brewing, beverage preparation equipment generally adopts automatic bag-switching structures. Take coffee as an example. There are hundreds of paper-bag coffee brands on the market. Although the size of the 45mm round coffee powder cake inside them is the same, the design of the edge of the paper bag is unique and lacks a unified standard. The automatic bag-switching structure adopts a variety of strategies to fix the paper bag. Most designs focus on the outer part of the paper bag, which has obvious limitations.

[0003] Taking the Chinese invention patent application 202210380486.0 (publication number CN 114931319 A) as an example, in the proposed "Automatic Bag Dropping Device for Capsule Coffee Machine", the chuck fixes the paper bag by clamping the skirt in the middle of both sides of the paper bag. Since the edge sizes of paper bags of different brands are different, this structure is used to fix the paper bag. Assuming that the diameters of different paper bags differ by 2 mm, this will result in a height difference of 7.5 mm. There is an offset between the center of the paper bag and the center of the brewing chamber, which may have an adverse effect on the coffee brewing effect. Therefore, a machine cannot be used for coffee bags with different edge sizes. The reality is that coffee bags produced by different manufacturers often have the same size of the powder cake part of the coffee bag, which is 45 mm round, but the edge size is not the same. Therefore, a machine can often only be used to extract coffee bags produced by a certain manufacturer, and is not compatible with coffee bags produced by other manufacturers.

[0004] Another patent, "Paper Bag Coffee Machine Brewing Device" with application number 201310361909.5 (publication number CN 103417120 A), has a bag support frame that supports the paper bag from the bottom. Under this structure, assuming that the diameter of different paper bags is 2 mm different, the height difference is 1 mm. Compared with the aforementioned patent, this design is more adaptable to paper bags of different specifications, but the difference still exists, and the above-mentioned problems still exist. Moreover, when the paper bag falls into the system, its skirt may be deformed due to gravity, resulting in unpredictable errors, and the error will make it difficult for the coffee brewing chamber to accurately accommodate the coffee bag powder part, thereby affecting the effective sealing of the brewing chamber and the extraction effect of the coffee.

[0005] It can be seen that the existing brewing system has difficulties in adapting to the diverse paper packages. The main problem is that the paper packages are different in weight and external shape, which makes it difficult for the paper packages to stably enter the brewing cavity vertically and smoothly leave the brewing cavity. In addition, the structure and operation mechanism of the beverage preparation equipment with automatic package removal structure are also relatively complex. Therefore, further innovation and improvement are still needed to address these shortcomings. Summary of the invention

[0006] The technical problem to be solved by the present invention is to propose an automatic bag-switching mechanism for a beverage preparation device that is compatible with paper bags of different skirt sizes and a beverage preparation device using the automatic bag-switching mechanism in view of the above technical status quo.

[0007] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an automatic bag-switching mechanism of a beverage preparation device, comprising a base and a first mechanism and a second mechanism arranged in the base, the first mechanism being able to be relatively close to or away from the second mechanism, and the first mechanism and the second mechanism being closed together to form a brewing chamber that can accommodate a paper bag, and a paper bag holder that can support the paper bag from the bottom when the paper bag is put into the beverage preparation device is also provided, characterized in that the paper bag holder is provided with a bag-supporting groove for supporting the paper bag, the shape of the bag-supporting groove is adapted to the bottom of the powder cake of the paper bag, and the bottom surface of the bag-supporting groove is provided with a narrow avoidance groove for avoiding the skirt of the paper bag.

[0008] Preferably, the extending direction of the bag supporting groove is parallel to the cross section of the machine base, so that the center position of the paper bag supported by the paper bag support will not change during the approach of the first machine part and the second machine part.

[0009] In order to enable the paper bag to enter the brewing chamber stably and vertically, further, a narrow and long paper bag entrance is opened on the upper part of the machine base, and its extending direction is the same as that of the bag holding groove.

[0010] Preferably, the bag supporting groove can correspond to and fit with at least one fifth of the surface of the powder cake to ensure the stability of the paper bag supporting frame.

[0011] Furthermore, the avoidance slot extends downward to penetrate the bottom surface of the paper bag holder. Compared with a paper bag holder with a closed bottom, this structure does not need to completely wrap the paper bag skirt edge, but can make the paper bag skirt edge extend out of the bottom surface of the paper bag holder, so the structure of the paper bag holder can be more compact.

[0012] Preferably, the paper bag support is connected to the first mechanism or the second mechanism and moves therewith.

[0013] Specifically, the paper bag holder is connected to the second mechanism, and the automatic bag switching mechanism also includes a handle, which is arranged above the machine base and connected to the second mechanism. When the handle is opened, the second mechanism and the paper bag holder are driven away from the first mechanism, and when the handle is closed, the second mechanism and the paper bag holder are driven close to the first mechanism.

[0014] The separation of the paper bag holder from the paper bag can be more conducive to the brewing work of the beverage preparation device. Therefore, further, the paper bag holder is rotationally connected to the second mechanism, and the paper bag holder can rotate relative to the second mechanism, so that the paper bag holder can change between a supporting state with the bag holding groove opening upward, and a detached state flipped downward relative to the second mechanism.

[0015] Specifically, during the closing process of the handle, the paper bag holder contacts the first part before the second part, and after the contact force is applied, the paper bag holder rotates downward to change to a disengaged state, and the second part continues to move forward and contacts the first part to close and form a brewing chamber;

[0016] During the opening process of the handle, the paper bag support moves backwards until it contacts the machine base. After being subjected to contact force, the paper bag support rotates upwards and returns to the supporting state. In this state, the paper bag support extends out of the second machine part, and the bag supporting groove and the paper bag entrance are on the same vertical line to support the next paper bag.

[0017] In order to prevent the paper bale holder from rotating downward due to gravity and being unable to support the paper bale, preferably, the paper bale holder has a card point protruding from the surface of the paper bale holder, and the second mechanism is provided with a corresponding card slot. When the paper bale holder is in a supporting state, the card point is inserted into the card slot to fix the paper bale holder.

[0018] Preferably, a sliding cover for covering the entrance of the paper bag is provided above the machine base, and the sliding cover is connected to the handle and driven to slide by the handle. During the opening of the handle, the sliding cover is driven to slide in the direction of exposing the entrance of the paper bag, and during the closing of the handle, the sliding cover is driven to slide in the direction of covering the entrance of the paper bag.

[0019] After brewing, the paper bag easily sticks to the brewing chamber and cannot be smoothly replaced. Preferably, the automatic bag replacing mechanism of the present invention also includes a bag ejection plate, which is elastically connected to the side of the first part close to the second part, and the bag ejection plate always has a tendency to pop out in the direction of the second part.

[0020] Furthermore, at least one anti-sticking spring is connected to the board surface of the bomb board close to the second mechanism, and at least one anti-sticking spring is also arranged on the side of the second mechanism close to the first mechanism. Under the pushing action of the anti-sticking spring, the brewed paper bag is more easily separated from the brewing chamber.

[0021] To further ensure the automatic dropping of paper bales, the automatic dropping mechanism of the present invention also includes a paper bale scraper. The first machine part is fixed, and the paper bale scraper is arranged on the upper part of the first machine part close to the second machine part. The paper bale scraper is elastically connected to the upper part of the machine base so that the paper bale scraper always has a tendency to move downward.

[0022] Specifically, during the process of the second machine part approaching the first machine part, the paper bag scraper is pushed upward and scrapes the hand gripping part of the paper bag skirt and then bends and presses it;

[0023] When the second mechanism moves away from the first mechanism, the paper bag scraper moves downward and drives the paper bag to fall.

[0024] Preferably, the automatic bag-switching mechanism of the present invention further comprises a micro switch, which is arranged in the machine base, and the second machine part is connected with a trigger for triggering the micro switch, and when the second machine part and the first machine part are closed to form a brewing chamber, the trigger moves with the second machine part to contact the spring of the micro switch to switch it on. This ensures that when the first machine part and the second machine part are far apart, the micro switch is disconnected, and the machine cannot work by touching any key, and when the brewing chamber is formed, the micro switch is automatically connected, the machine enters a ready state, and can work by touching a key.

[0025] The present invention further provides a beverage preparation device, characterized in that the above-mentioned automatic package-switching mechanism is applied.

[0026] Compared with the prior art that uses the skirt of a paper bag as a positioning point, the present invention specifically selects the bottom of a paper bag powder as a positioning point, and provides a bag support groove through a paper bag support frame, so that the shape of the bag support groove corresponds to and matches the bottom of the paper bag powder, and uses the indentation arc of the bottom of the powder that remains unchanged for fixation, which cleverly avoids the universal limitations caused by the differences in the skirt of the paper bag, making it widely applicable to 45 mm round powder paper bags of various brands. A narrow avoidance groove is also specially provided on the bottom surface of the bag support groove, and the skirt of the paper bag is inserted into the narrow avoidance groove to eliminate the interference of the skirt of the paper bag, so as to achieve the purpose of using the bottom of the paper bag powder as a positioning point, ensuring that no matter how the size or height of the skirt of the paper bag changes, accurate positioning and stable fixation can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the present invention;

[0028] Figure 2 is a cross-sectional view of an embodiment of the present invention when the handle is fully opened;

[0029] Figure 3 is a cross-sectional view of an embodiment of the present invention during the process of closing the handle;

[0030] Figure 4 is a cross-sectional view of an embodiment of the present invention when the handle is fully closed;

[0031] Figure 5 is a cross-sectional view of an embodiment of the present invention during the process of opening the handle;

[0032] Figure 6 It is a cross-sectional view of the embodiment of the present invention when the paper bag bracket just contacts the machine base and is subjected to force;

[0033] Figure 7 is a cross-sectional view of an embodiment of the present invention during the upward rotation process of the paper bag support;

[0034] Figure 8 It is a cross-sectional view of the embodiment of the present invention when the paper bag holder is reset to a state where the bag holding groove opens upward;

[0035] Fig. 9 A schematic structural diagram of a paper bag bracket according to an embodiment of the present invention;

[0036] Fig.10 It is a schematic diagram of the structure of an embodiment of the present invention after the handle and the base housing are hidden;

[0037] Fig.11 It is a schematic diagram of the connection structure between the paper bag holder and the second member in a state where the bag holding groove is opened forward according to an embodiment of the present invention;

[0038] Fig.12 It is a schematic diagram of the connection structure between the paper bag holder and the second component in a state where the bag holding groove is opened upward according to an embodiment of the present invention. DETAILED DESCRIPTION

[0039] The present invention is further described in detail below with reference to the accompanying drawings.

[0040] like Figures 1 to 12 The figure shows a preferred embodiment of the automatic bag-switching mechanism and the beverage preparation device using the automatic bag-switching mechanism of the present invention.

[0041] This embodiment includes a machine base 1 with a handle 11. A paper bag entrance 13 for placing paper bags 2 is opened on the top of the machine base 1. The paper bag entrance 13 is long and narrow and extends in the left-right direction. A sliding cover 12 is provided on the paper bag entrance 13. The sliding cover 12 is driven by the handle 11 to slide forward and backward. Figure 2 As shown, the sliding cover 12 moves backward to expose the paper bag entrance 13; when the handle 11 is closed, Figure 4 As shown, the sliding cover 12 moves forward to cover the paper bag entrance 13.

[0042] The base 1 is provided with a first mechanism 5 and a second mechanism 3, the first mechanism 5 is fixed, and the second mechanism 3 is connected to the handle 11 and can be moved closer to or farther away from the first mechanism 5 in the base 1 of the beverage preparation device under the drive of the handle 11. When the handle 11 is fully closed, the second mechanism 3 moves to the front of the movable position and closes with the first mechanism 5, and a brewing chamber is formed between the first mechanism 5 and the second mechanism 3.

[0043] The lower part of the second mechanism 3 is connected to a paper bag support 4, and the paper bag support 4 is provided with a bag support groove 41 for supporting the paper bag 2. Fig. 9 As shown, the bag supporting groove 41 extends in the left-right direction, and its shape corresponds to and fits at least 1 / 5 of the arc at the bottom of the powder cake 21 of the paper bag 2. Taking into account the size of the paper bag bracket 4 and the stability of the paper bag support, this embodiment specially selects approximately 1 / 4 of the arc at the bottom of the paper bag powder cake 21 as the positioning point, ensuring that no matter how the size or height of the paper bag skirt 22 changes, accurate positioning and stable fixation can be achieved.

[0044] The cross section of the bag holding groove 41 is inverted trapezoidal or "V" shaped, and the bottom surface is provided with a narrow groove 42 for avoiding the paper bag skirt 22. The narrow groove 42 extends in the left and right directions and penetrates downwardly through the bottom surface of the paper bag holder 4. When the handle 11 is fully opened, the position of the bag holding groove 41 corresponds to the position of the paper bag inlet 13. After the paper bag 2 is put into the machine base 1 from the paper bag inlet 13, it falls into the bag holding groove 41. The paper bag skirt 22 penetrates into the narrow groove 42. The bottom of the powder cake 21 of the paper bag 2 is stably supported by the bag holding groove 41, and moves into the brewing chamber with the movement of the paper bag holder 4 in the subsequent process.

[0045] The paper bag holder 4 is rotatably connected to the second mechanism 3, so that the paper bag holder 4 can change between a supporting state in which the bag holding groove 41 is opened upward and a disengaged state in which the bag holding groove 41 is turned downward relative to the second mechanism 3. Figure 2 The paper bag holder 4 is in a state where the bag holding groove 41 opens upwards. In this state, the paper bag holder 4 extends forward from the second mechanism 3. In this state, the paper bag 2 is put into the paper bag entrance 13. Then, the handle 11 is closed. During the closing process, refer to Figure 3 and Figure 4 , the paper bag holder 4 contacts the first machine part 5 before the second machine part 3, and the paper bag holder 4 rotates downward after the contact force changes to the disengaged state, and the second machine part 3 continues to move forward and contacts the first machine part 5 to close and form a brewing chamber. After brewing is completed, when the handle 11 is opened, refer to Figures 6 to 8 , the paper bag bracket 4 moves backward to contact with the machine base 1, and after the contact force is applied, the paper bag bracket 4 rotates upward to return to the supporting state.

[0046] In summary, when the handle 11 is fully closed, the paper bag holder 4 automatically rotates downward due to the contact force, and the paper bag 2 is separated from the paper bag holder 4 and sent into the brewing chamber for brewing. After brewing is completed, the handle 11 is opened to the maximum extent, the paper bag 2 automatically falls, and the paper bag holder 4 returns to the supporting state after contacting the machine base 1, so as to support the next paper bag 2.

[0047] refer to Fig.11 and Fig.12 In order to prevent the paper bag holder 4 from rotating downward due to gravity and being unable to support the paper bag 2, the paper bag holder 4 has a protruding clamping point 43, and the second mechanism 3 is provided with a corresponding clamping port 31. When the paper bag holder 4 is in the supporting state, the clamping point 43 is clamped into the clamping port 31 to fix the paper bag holder 4.

[0048] Since the second mechanism 3 and the first mechanism 5 are not completely closed to form the brewing chamber when the paper bag bracket 4 starts to rotate downward, in order to ensure that the paper bag 2 can still smoothly enter the brewing chamber after the supporting function of the paper bag bracket 4 is removed, and also to prevent the paper bag 2 from being unable to fall smoothly due to adhesion to the brewing chamber after brewing, the present embodiment is provided with a bag-snapping plate 6. The bag-snapping plate 6 is connected to the rear side of the first mechanism 5 through a spring, and under the action of the spring, the bag-snapping plate 6 always has a tendency to translate backward, and at least one anti-sticking spring 7 is connected to the rear plate surface of the bag-snapping plate 6, and at least one anti-sticking spring 7 is also provided on the front side of the second mechanism 3.

[0049] like Figure 3 As shown, during the closing process of the handle 11, the paper bag holder 4 contacts the first mechanism 5 before the second mechanism 3, and starts to rotate downward under the contact force, at which time the paper bag 2 is clamped by the anti-sticking springs 7 on the front and rear sides, and no longer moves with the paper bag holder 4. After brewing, the paper bag 2 is easily adhered to the brewing chamber and cannot be smoothly dropped, while the bag ejection plate 6 can drive the paper bag 2 to retreat during the opening process of the handle 11, and the front and rear anti-sticking springs 7 fall off.

[0050] To further ensure the automatic removal of the paper package 2, the automatic removal mechanism of this embodiment further includes a paper package scraper 8. Fig.10 The paper bag scraper 8 is arranged between the first machine part 5 and the second machine part 3. The paper bag scraper 8 is elastically connected to the upper part of the machine base 1 through a spring. The spring makes the paper bag scraper 8 always have a tendency to move downward. When the handle 11 is closed, the second machine part 3 is pushed toward the first machine part 5. After the paper bag scraper 8 contacts the second machine part 3 and is subjected to force, it is pushed upward and scrapes the hand grip 23 of the paper bag skirt 22 and then bends and presses it. When the handle 11 is opened, the spring releases energy to drive the paper bag scraper 8 to move downward and push the paper bag 2 to fall.

[0051] This embodiment further includes a micro switch 9, which is disposed at the front side of the base 1. The second mechanism 3 is connected with a trigger for triggering the micro switch 9. Fig.10 As shown. When the handle 11 is completely closed, the trigger follows the second mechanism 3 and moves forward to contact the spring of the micro switch 9 to turn it on. This ensures that when the handle 11 is open, the micro switch 9 is disconnected, and the machine cannot work by touching any key. When the handle 11 is completely closed, the micro switch 9 is automatically turned on, the machine enters the ready state, and can work by touching a key.

[0052] The working principle of this embodiment:

[0053] like Figure 2 As shown, first, the handle 11 is in the fully opened initial state, at which time the micro switch 9 is in the disconnected state, and any button of the beverage preparation device is not operated. At the same time, the second mechanism 3 is in the rear position in the base 1, the card point 43 of the paper bag holder 4 is inserted into the card slot 31 of the second mechanism 3, the bag holding groove 41 is in a stable supporting state, and the position of the bag holding groove 41 corresponds to the position of the paper bag inlet 13. The sliding cover 12 is also in the rear position, the paper bag inlet 13 is exposed outside the sliding cover 12, the bag ejection plate 6 is in a state of fully ejecting backwards, and the paper bag scraper 8 also maintains a naturally drooping balance state under the action of spring tension and gravity. The user throws the paper bag 2 into the base 1 from the paper bag inlet 13, and the paper bag 2 falls on the paper bag holder 4, the paper bag skirt 22 is inserted into the avoidance slot 42, and the bottom of the powder cake 21 of the paper bag 2 is stably supported by the bag holding groove 41.

[0054] Then as Figure 3 As shown, the handle 11 is in the process of closing, and the micro switch 9 is still in the off state. The sliding cover 12, the second mechanism 3 and the paper bag support 4 have all moved forward a certain distance. The paper bag support 4 is located in front of the second mechanism 3 and contacts the first mechanism 5 before the second mechanism 3. The contact force makes the paper bag support 4 have a tendency to rotate downward. The paper bag 2 moves forward synchronously with the paper bag support 4 under the support of the paper bag support 4, and is clamped by the anti-sticking spring 7 of the elastic bag plate 6 and the anti-sticking spring 7 of the second mechanism 3, and is ready to be separated from the paper bag support 4.

[0055] When the handle 11 is completely closed, Figure 4In the process of contacting and receiving force with the first machine part 5, the card point 43 of the paper bag holder 4 is disengaged from the card slot 31 of the second machine part 3, and the paper bag holder 4 rotates downward to the disengaged state, so that the second machine part 3 can continue to move forward to close with the first machine part 5, and the paper bag 2 is pushed into the brewing chamber formed after closing. The sliding cover 12 continues to move forward and completely covers the paper bag entrance 13. The paper bag scraper 8 is pushed upward by the second machine part 3, and the spring connected to the paper bag scraper 8 accumulates energy, and the paper bag scraper 8 completely presses the hand grip 23 of the paper bag skirt 22. The spring connecting the first machine part 5 and the spring plate 6 is compressed and accumulates energy, and the anti-sticking spring 7 is also compressed. The spring of the micro switch 9 contacts the second machine part 3 that moves forward, and the micro switch 9 is turned on, and the buttons of the beverage preparation device can operate normally.

[0056] The user operates the beverage preparation device by pressing buttons to brew the beverage. After brewing is completed, the user opens the handle 11. Figure 5 As shown, the sliding cover 12, the second mechanism 3 and the paper bag holder 4 move backward as the handle 11 is opened, the spring connecting the first mechanism 5 and the bag ejection plate 6 releases energy to push the bag ejection plate 6 backward, the bag ejection plate 6 drives the paper bag 2 to retreat, the paper bag 2 and the front and rear anti-sticking springs 7 fall off, the paper bag scraper 8 is pressed downward by the spring to press the hand grip 23 of the paper bag skirt 22, the paper bag 2 naturally falls down to the capsule box under the influence of gravity, and the micro switch 9 is disconnected.

[0057] Handle 11 continues to open, refer to Figure 6 As the handle 11 is opened, the sliding cover 12, the second mechanism 3 and the paper bag support 4 continue to move backward, and the paper bag support 4 contacts the base 1 and tends to rotate upward under the contact force. Figure 7 , the handle 11 is further opened, and the paper bag bracket 4 starts to rotate upward.

[0058] Finally, the handle 11 is fully opened. Figure 8 , the paper bag holder 4 rotates upward to the card point 43 and re-cards into the card slot 31 of the second mechanism 3, the paper bag holder 4 returns to the supporting state, the automatic bag switching mechanism and the beverage preparation device are restored to the initial state, and are ready for the next brewing.

Claims

1. An automatic bag-changing mechanism for a beverage preparation device, comprising a base (1) and a first mechanism (5) and a second mechanism (3) arranged in the base (1), wherein the first mechanism (5) can be relatively close to or away from the second mechanism (3), and the first mechanism (5) and the second mechanism (3) are closed to form a brewing chamber for accommodating a paper bag, and a paper bag holder (4) is provided to support the paper bag from the bottom when the paper bag is placed in the beverage preparation device, characterized in that: The paper bag support frame (4) is provided with a bag supporting groove (41) for supporting the paper bag (2); the shape of the bag supporting groove is adapted to the bottom of the powder cake (21) of the paper bag (2); and the bottom surface of the bag supporting groove (41) is provided with a narrow avoidance groove (42) for avoiding the skirt edge (22) of the paper bag.

2. The automatic package-switching mechanism according to claim 1, characterized in that: The extending direction of the bag holding groove (41) is parallel to the cross section of the machine base (1).

3. The automatic package-switching mechanism according to claim 2, characterized in that: The upper part of the machine base (1) is provided with a narrow and long paper bag entrance (13), and its extending direction is the same as that of the bag holding groove (41).

4. The automatic package-switching mechanism according to any one of claims 1 to 3, characterized in that: The bag holding groove (41) can be adapted to correspond to at least one fifth of the surface of the powder cake (21).

5. The automatic package-switching mechanism according to claim 1, characterized in that: The avoidance slot (42) extends downward to penetrate the bottom surface of the paper bag bracket (4).

6. The automatic package-switching mechanism according to claim 1, characterized in that: The paper bag support (4) is connected to the first machine part (5) or the second machine part (3) and moves with it.

7. The automatic package-switching mechanism according to claim 6, characterized in that: The paper bag holder (4) is connected to the second machine part (3), and the automatic bag-switching mechanism further comprises a handle (11), which is arranged above the machine base (1) and connected to the second machine part (3). When the handle (11) is opened, the second machine part (3) and the paper bag holder (4) are driven away from the first machine part (5), and when the handle (11) is closed, the second machine part (3) and the paper bag holder (4) are driven close to the first machine part (5).

8. The automatic package-switching mechanism according to claim 7, characterized in that: The paper bag support (4) is rotatably connected to the second machine part (3), and the paper bag support (4) can rotate relative to the second machine part (3), so that the paper bag support (4) can change between a supporting state with the bag supporting groove (41) opening upward and a disengaged state with the bag supporting groove (41) flipped downward relative to the second machine part (3).

9. The automatic package-switching mechanism according to claim 8, characterized in that: During the closing process of the handle (11), the paper bag support (4) contacts the first machine part (5) before the second machine part (3), and after the contact force is applied, the paper bag support (4) rotates downward to change to a disengaged state, and the second machine part (3) continues to move forward and contacts and closes with the first machine part (5) to form a brewing chamber; When the handle (11) is opened, the paper bag support (4) moves backwards until it contacts the machine base (1). After being subjected to contact force, the paper bag support (4) rotates upwards to return to a supporting state, in which the paper bag support (4) extends out of the second machine part (3).

10. The automatic package-switching mechanism according to claim 7 or 8, characterized in that: The paper bag support (4) has a clamping point (43) protruding from the surface of the paper bag support (4), and the second mechanism (3) is provided with a corresponding clamping opening (31). When the paper bag support (4) is in a supporting state, the clamping point (43) is clamped into the clamping opening (31) to fix the paper bag support (4).

11. The automatic package-switching mechanism according to claim 7, characterized in that: A sliding cover (12) for covering the paper bag entrance (13) is provided above the machine base (1); the sliding cover (12) is connected to the handle (11) and is driven to slide by the handle (11); when the handle (11) is opened, the sliding cover (12) is driven to slide in a direction to expose the paper bag entrance (13); and when the handle (11) is closed, the sliding cover (12) is driven to slide in a direction to cover the paper bag entrance (13).

12. The automatic package-switching mechanism according to claim 1, characterized in that: It also comprises an elastic package plate (6), which is elastically connected to a side of the first machine part (5) close to the second machine part (3), and the elastic package plate (6) always has a tendency to pop out in the direction of the second machine part.

13. The automatic package-switching mechanism according to claim 12, characterized in that: At least one anti-sticking spring (7) is connected to the plate surface of the bullet pack plate (6) close to the second machine part (3), and at least one anti-sticking spring (7) is also arranged on the side of the second machine part (3) close to the first machine part (5).

14. The automatic package-switching mechanism according to claim 1, characterized in that: The invention also comprises a paper bag scraper (8), wherein the first machine part (5) is fixed, the paper bag scraper (8) is arranged at the upper part of the first machine part (5) close to the second machine part (3), and the paper bag scraper (8) is elastically connected to the upper part of the machine base (1) so that the paper bag scraper (8) always has a tendency to move downward.

15. The automatic package-switching mechanism according to claim 14, characterized in that: When the second machine part (3) and the first machine part (5) are approaching each other, the paper bag scraper (8) is pushed upward and scrapes the hand gripping part (23) of the paper bag skirt (22) and then bends and presses it; During the process of the second machine part (3) moving away from the first machine part (5), the paper bag scraper (8) moves downward and drives the paper bag (2) to fall.

16. The automatic package-switching mechanism according to claim 1, characterized in that: The invention also comprises a micro switch (9) which is arranged in the base (1); the second machine part (3) is connected with a trigger for triggering the micro switch (9); when the second machine part (3) and the first machine part (5) are closed to form a brewing chamber, the trigger moves with the second machine part (3) to contact the spring of the micro switch (9) to switch it on.

17. A beverage preparation device, characterized in that The automatic package switching mechanism according to any one of claims 1 to 16 is applied.

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