Automatic dripping switch device of dripping coffee machine and dripping coffee machine

Abstract

The invention discloses an automatic dripping switch device of a dripping coffee machine and the dripping coffee machine. The drip coffee machine comprises a brewing bin with a funnel and a coffee containing cup, a liquid outlet is formed in the bottom of the brewing bin, a liquid inlet is formed in the center of a cup cover, a liquid inlet pipe is arranged in the center of the cup cover, a fixed magnetic attraction piece comprising a first magnet is arranged at the position, at the liquid inlet, of the liquid inlet pipe, and a movable magnetic attraction valve comprising a second magnet is arranged at the position, at the liquid outlet, of the bottom of the brewing bin. After the coffee containing cup is arranged under the brewing bin and aligned with the brewing bin, the first magnet and the second magnet are attracted through magnetic force, the movable magnetic attraction valve moves downwards, the opening in the bottom of the funnel is not sealed, and coffee liquid drips and flows out through the liquid outlet, flows into the liquid inlet pipe through the liquid inlet and finally enters the coffee containing cup. After the coffee containing cup moves away from the position under the brewing bin, the movable magnetic suction valve automatically resets, the opening in the bottom of the funnel is sealed, and coffee liquid is retained in the brewing bin so as to be prevented from leaking and flowing out. The coffee maker can be widely applied to the field of coffee making appliances.

Description

Technical Field

[0001] The present invention relates to coffee brewing accessories, in particular to an automatic drip switch device for a drip coffee machine. In addition, the present invention also relates to a coffee brewing appliance, in particular to a drip coffee machine. Background Art

[0002] Coffee is one of the world's three major beverages. Prior art coffee brewing appliances are primarily used on desktops in homes or offices. They connect to the mains via a power cord and use hot water and coffee powder, coffee pods, or coffee capsules to brew coffee.

[0003] When making coffee, existing drip coffee machines continue to drip coffee from the drip port at the bottom once hot water enters the brewing chamber. If the coffee cup located at the bottom of the brewing chamber needs to be used temporarily or removed, coffee will continue to drip from the base, causing contamination and inconvenience. Currently, there is no switch device that can automatically stop the dripping of the brewing chamber when the coffee cup located at the bottom of the brewing chamber is removed, nor is there such a drip coffee machine. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology and provide an automatic drip switch device for a drip coffee machine that can avoid pollution and is easy to use. The automatic drip switch device for a drip coffee machine can automatically stop dripping from the brewing chamber when the coffee accommodating cup is removed.

[0005] The invention also provides a drip coffee machine with an automatic drip switch.

[0006] The technical solution adopted by the automatic drip switch device of the drip coffee machine of the present invention is as follows: the drip coffee machine of the present invention includes a brewing chamber and a movable finished coffee accommodating cup, the brewing chamber includes a funnel, the finished coffee accommodating cup includes a cup body and a cup cover, a liquid outlet is provided at the bottom center of the brewing chamber, a liquid inlet is provided at the center of the cup cover, a liquid inlet pipe is provided at the center of the cup cover extending from the liquid inlet to the bottom of the cup body, a fixed magnetic part is provided on the liquid inlet pipe at the liquid inlet, the fixed magnetic part includes a first magnet, and a movable magnetic valve is provided at the bottom of the brewing chamber at the liquid outlet, the movable magnetic valve includes a second magnet; only when the finished coffee is After the accommodating cup is placed directly below the brewing chamber and aligned with it, the first magnet and the second magnet are attracted by magnetic force, causing the active magnetic valve to move downward, the bottom opening of the funnel to be in an unsealed state, and the brewed coffee liquid drips out through the liquid outlet, flows into the liquid inlet pipe through the liquid inlet aligned with it, and finally enters the finished coffee accommodating cup; after the finished coffee accommodating cup is moved away from directly below the brewing chamber, the effective attractive magnetic force between the first magnet and the second magnet is no longer there, the active magnetic valve automatically resets, sealing the bottom opening of the funnel, and the brewed coffee liquid is retained in the brewing chamber to prevent dripping out.

[0007] The fixed magnetic component also includes a magnet sleeve and a plug. The center of the magnet sleeve is provided with an inner cavity. The first magnet is placed in the inner cavity of the magnet sleeve. The plug is used to seal the bottom of the inner cavity of the magnet sleeve.

[0008] The top of the magnet sleeve is provided with a boss, and the outer wall is provided with a first external thread, so that the boss can be held by hand and is connected and fixed with the first internal thread on the top of the liquid inlet pipe through the external thread.

[0009] The outer wall of the fixed magnetic component is provided with a plurality of drip channels, which axially penetrate the magnet sleeve and the plug, so that after the fixed magnetic component is connected and fixed to the liquid inlet pipe, the liquid inlet port is communicated with the lower part of the liquid inlet pipe, and the brewed coffee liquid can drip into the cup body.

[0010] An annular groove is provided on the periphery of the cup cover, and a plurality of overflow liquid collecting ports are provided in the annular groove along the circumferential direction and communicated with the interior of the cup body.

[0011] The movable magnetic valve also includes a valve core, a sealing cover, an annular sealing ring, and a reset spring. The head of the valve core is provided with an annular boss, the middle is provided with an annular groove, and the center of the tail is provided with a core cavity. The second magnet is placed in the core cavity. The sealing cover is connected to the tail of the valve core to seal the bottom of the core cavity. The annular sealing ring is sealingly sleeved on the annular groove. The bottom opening of the funnel is provided with an inward-extending annular edge. The reset spring is sleeved on the valve core and is limitedly compressed between the annular boss and the annular edge. In the reset state, under the elastic force of the reset spring, one end presses against the annular boss , causing the valve core to be forced to move upward until the annular sealing ring is pressed against the bottom of the annular edge, so that the annular sealing ring seals the bottom opening of the funnel, so that the coffee liquid is retained in the brewing chamber; after the finished coffee accommodating cup is placed directly below the brewing chamber and aligned with it, the second magnet is attracted by the magnetic force of the first magnet, driving the valve core to be forced to move downward until the annular boss is clamped and limited by the side wall of the funnel cavity. At this time, the annular sealing ring is separated from the bottom of the annular edge, and the bottom opening of the funnel is opened, so that the coffee liquid drips out through the liquid outlet.

[0012] The outer side wall of the tail portion of the valve core is provided with a second external thread, and the sealing cover is connected to the second external thread via its second internal thread so as to be connected and fixed to the tail portion of the valve core.

[0013] A plurality of drainage channels are provided on the outer wall of the valve core above the annular groove and axially penetrate the annular boss so that the coffee liquid in the funnel can flow out smoothly through the bottom opening.

[0014] The annular sealing ring is an elastic element and is made of silicone or rubber.

[0015] The technical solution adopted by the drip coffee machine of the present invention is as follows: the drip coffee machine of the present invention comprises a base, a body, a water tank with a heating device, a brewing chamber, a movable finished coffee accommodating cup, a micro water pump and an automatic drip switch device of the drip coffee machine, the body is fixedly connected to the base, the water tank is arranged above the body, the brewing chamber is suspended and the side is fixedly connected to the water tank, the finished coffee accommodating cup is placed on the base, the micro water pump is arranged in the body, and the micro water pump is used to pump the heated hot water in the water tank into the brewing chamber through the hot water outlet located above the brewing chamber; the brewing chamber comprises a funnel, and the finished coffee accommodating cup comprises a cup body and a cup cover, a liquid outlet is provided at the bottom center of the brewing chamber, a liquid inlet is provided at the center of the cup cover, and a liquid inlet pipe is extended from the liquid inlet to the bottom of the cup body at the center of the cup cover. The liquid inlet pipe is provided with a fixed magnetic part at the liquid inlet, and the fixed magnetic part includes a first magnet. The bottom of the brewing chamber is provided with an active magnetic valve at the liquid outlet, and the active magnetic valve includes a second magnet. Only after the finished coffee accommodating cup is placed directly below the brewing chamber and aligned with it, the first magnet and the second magnet are attracted by magnetic force, causing the active magnetic valve to move downward, and the bottom opening of the funnel is in an unsealed state. The brewed coffee liquid drips out through the liquid outlet and flows into the liquid inlet pipe through the liquid inlet aligned with it, and finally enters the finished coffee accommodating cup. After the finished coffee accommodating cup is moved away from directly below the brewing chamber, the effective attractive magnetic force between the first magnet and the second magnet is no longer there, and the active magnetic valve is automatically reset to seal the bottom opening of the funnel, so that the brewed coffee liquid is retained in the brewing chamber to prevent dripping out.

[0016] The fixed magnetic component also includes a magnet sleeve and a plug. The center of the magnet sleeve is provided with an inner cavity. The first magnet is placed in the inner cavity of the magnet sleeve. The plug is used to seal the bottom of the inner cavity of the magnet sleeve.

[0017] The top of the magnet sleeve is provided with a boss, and the outer wall is provided with a first external thread, so that the boss can be held by hand and is connected and fixed with the first internal thread on the top of the liquid inlet pipe through the external thread.

[0018] The outer wall of the fixed magnetic component is provided with a plurality of drip channels, which axially penetrate the magnet sleeve and the plug, so that after the fixed magnetic component is connected and fixed to the liquid inlet pipe, the liquid inlet port is communicated with the lower part of the liquid inlet pipe, and the brewed coffee liquid can drip into the cup body.

[0019] An annular groove is provided on the periphery of the cup cover, and a plurality of overflow liquid collecting ports are provided in the annular groove along the circumferential direction and communicated with the interior of the cup body.

[0020] The movable magnetic valve also includes a valve core, a sealing cover, an annular sealing ring, and a reset spring. The head of the valve core is provided with an annular boss, the middle is provided with an annular groove, and the center of the tail is provided with a core cavity. The second magnet is placed in the core cavity. The sealing cover is connected to the tail of the valve core to seal the bottom of the core cavity. The annular sealing ring is sealingly sleeved on the annular groove. The bottom opening of the funnel is provided with an inward-extending annular edge. The reset spring is sleeved on the valve core and is limitedly compressed between the annular boss and the annular edge. In the reset state, under the elastic force of the reset spring, one end presses against the annular boss , causing the valve core to be forced to move upward until the annular sealing ring is pressed against the bottom of the annular edge, so that the annular sealing ring seals the bottom opening of the funnel, so that the coffee liquid is retained in the brewing chamber; after the finished coffee accommodating cup is placed directly below the brewing chamber and aligned with it, the second magnet is attracted by the magnetic force of the first magnet, driving the valve core to be forced to move downward until the annular boss is clamped and limited by the side wall of the funnel cavity. At this time, the annular sealing ring is separated from the bottom of the annular edge, and the bottom opening of the funnel is opened, so that the coffee liquid drips out through the liquid outlet.

[0021] The outer side wall of the tail portion of the valve core is provided with a second external thread, and the sealing cover is connected to the second external thread via its second internal thread so as to be connected and fixed to the tail portion of the valve core.

[0022] A plurality of drainage channels are provided on the outer wall of the valve core above the annular groove and axially penetrate the annular boss so that the coffee liquid in the funnel can flow out smoothly through the bottom opening.

[0023] The annular sealing ring is an elastic element and is made of silicone or rubber.

[0024] The beneficial effects of the present invention are as follows: since the drip coffee machine of the present invention includes a brewing chamber and a movable finished coffee accommodating cup, the brewing chamber includes a funnel, the finished coffee accommodating cup includes a cup body and a cup cover, a liquid outlet is provided at the center of the bottom of the brewing chamber, a liquid inlet is provided at the center of the cup cover, a liquid inlet pipe is provided at the center of the cup cover extending from the liquid inlet to the bottom of the cup body, a fixed magnetic attraction part is provided on the liquid inlet pipe at the liquid inlet, the fixed magnetic attraction part includes a first magnet, and a movable magnetic attraction valve is provided at the bottom of the brewing chamber at the liquid outlet. The valve includes a second magnet; only when the finished coffee accommodating cup is placed directly below the brewing chamber and aligned with it, the first magnet and the second magnet are attracted by magnetic force, causing the movable magnetic valve to move downward, the bottom opening of the funnel to be in an unsealed state, and the brewed coffee liquid drips out through the liquid outlet and flows into the liquid inlet pipe through the liquid inlet aligned with it, and finally enters the finished coffee accommodating cup; after the finished coffee accommodating cup is moved away from directly below the brewing chamber, the effective attractive magnetic force between the first magnet and the second magnet is no longer effective, The movable magnetic valve automatically resets to seal the bottom opening of the funnel, and the brewed coffee liquid is retained in the brewing chamber to prevent dripping out. The automatic drip switch device of the drip coffee machine of the present invention overcomes the defects and shortcomings of the prior art. By providing a magnetic switch mechanism, the drip switch automatically opens only after the finished coffee accommodating cup is placed directly below the brewing chamber and aligned with it, and the coffee liquid in the brewing chamber can drip out into the finished coffee accommodating cup, and coffee can be prepared normally. When the finished coffee accommodating cup is moved away from the brewing chamber, the drip switch automatically opens. The drip switch automatically resets and closes after the coffee liquid in the brewing chamber is completely brewed, thereby preventing the coffee liquid in the brewing chamber from dripping uncontrollably after the coffee is completely brewed, and preventing the base from being contaminated. The device is easy to use, and the finished coffee accommodating cup can be taken out at any time during the coffee making process to taste whether the coffee tastes suitable, so that the coffee can be adjusted at any time. The coffee can be made and tasted at any time without having to wait until the whole cup is brewed before drinking, which is extremely convenient. Therefore, the automatic drip switch device of the drip coffee machine of the present invention can avoid pollution, is easy to use, and can automatically stop the brewing chamber from dripping when the coffee accommodating cup is removed.

[0025] Similarly, the drip coffee maker of the present invention also has the above-mentioned beneficial effects, and is a drip coffee maker with an automatic drip switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of a drip coffee machine according to an embodiment of the present invention;

[0027] Figure 2 is a schematic longitudinal cross-sectional view of a drip coffee machine according to an embodiment of the present invention;

[0028] Figure 3is another longitudinal cross-sectional structural schematic diagram of the drip coffee machine according to an embodiment of the present invention;

[0029] Figure 4 1 is a schematic diagram of the overall structure of a fixed magnetic attraction member according to an embodiment of the present invention;

[0030] Figure 5 1 is a schematic diagram of the three-dimensional structure of the valve core of the movable magnetic valve according to an embodiment of the present invention from one perspective;

[0031] Figure 6 It is a schematic diagram of the three-dimensional structure of the valve core of the movable magnetic valve according to an embodiment of the present invention from another perspective. DETAILED DESCRIPTION

[0032] like Figures 1 to 6 As shown, the drip coffee machine of the embodiment of the present invention includes a base 1, a body 2, a water tank 3 with a heating device, a brewing chamber 4, a movable finished coffee accommodating cup 5, a micro water pump 6 and an automatic drip switch device of the drip coffee machine, the body 2 is fixedly connected to the base 1, the water tank 3 is arranged above the body 2, the brewing chamber 4 is suspended in the air, and the side is fixedly connected to the water tank 3, the finished coffee accommodating cup 5 is placed on the base 1, and the micro water pump 6 is arranged in the body 2. The micro water pump 6 is used to pump the heated hot water in the water tank 3 into the brewing chamber 40 through the hot water outlet 7 located above the brewing chamber 4.

[0033] Among them, the technical solution adopted by the automatic drip switch device of the drip coffee machine of this embodiment is: the brewing chamber 4 includes a funnel 40, the finished coffee accommodating cup 5 includes a cup body 51 and a cup cover 52, a liquid outlet 400 is provided at the center of the bottom of the brewing chamber 4, a liquid inlet 500 is provided at the center of the cup cover 52, a liquid inlet pipe 53 is provided at the center of the cup cover 52 extending from the liquid inlet 500 to the bottom of the cup body 51, a fixed magnetic part is provided on the liquid inlet pipe 53 at the liquid inlet 500, and the fixed magnetic part includes a first magnet 58, and an active magnetic valve is provided at the bottom of the brewing chamber 4 at the liquid outlet 400, and the active magnetic valve includes a second magnet 43; only when the finished coffee accommodating cup 5 is placed After being directly below the brewing chamber 4 and aligned with it, the first magnet 58 and the second magnet 43 are attracted by magnetic force, causing the active magnetic valve to move downward, and the bottom opening of the funnel 40 is in an unsealed state. The brewed coffee liquid drips out through the liquid outlet 400 and flows into the liquid inlet pipe 53 through the liquid inlet 500 aligned with it, and finally enters the finished coffee accommodating cup 5; after the finished coffee accommodating cup 5 moves away from directly below the brewing chamber 4, the effective attractive magnetic force between the first magnet 58 and the second magnet 43 is no longer there, and the active magnetic valve automatically resets, sealing the bottom opening of the funnel 40, and the brewed coffee liquid is retained in the brewing chamber 4 to prevent dripping out.

[0034] Furthermore, the fixed magnetic component also includes a magnetic sleeve 55 and a plug 56. The center of the magnetic sleeve 55 is provided with an inner cavity, and the first magnet 58 is placed in the inner cavity of the magnetic sleeve 55. The plug 56 is used to seal the bottom of the inner cavity of the magnetic sleeve 55. The top of the magnetic sleeve 55 is provided with a boss 550, and the outer wall is provided with a first external thread 57, so that the boss 550 can be held by hand and connected and fixed to the first internal thread 530 at the top of the liquid inlet pipe 53 through the external thread 57, which is convenient for assembly. The outer wall of the fixed magnetic component is provided with a plurality of drip channels 59, which axially penetrate the magnetic sleeve 55 and the plug 56, so that after the fixed magnetic component is connected and fixed to the liquid inlet pipe 53, the liquid inlet 500 is connected to the lower part of the liquid inlet pipe 53, so that the brewed coffee liquid can drip into the cup body 51, and prevent the fixed magnetic component from blocking the liquid inlet pipe 53.

[0035] Furthermore, an annular groove 54 is provided around the periphery of the cup cover 52, and a plurality of overflow collection ports 57 are provided circumferentially in the annular groove and communicated with the interior of the cup body 51, so as to collect the coffee liquid overflowing on the cup cover 52 when the coffee liquid overflows abnormally, and prevent it from overflowing to the outside.

[0036] Furthermore, the movable magnetic valve also includes a valve core 41, a sealing cover 42, an annular sealing ring 44, and a reset spring 45. The head of the valve core 41 is provided with an annular boss 411, the middle is provided with an annular groove 415, and the center of the tail is provided with a core cavity 414. The second magnet 43 is placed in the core cavity 414. The sealing cover 42 is connected to the tail of the valve core 41 to seal the bottom of the core cavity 414. The annular sealing ring 44 is sealed and sleeved on the annular groove 415. The bottom opening of the funnel 40 is provided with an inwardly extending annular edge 401. The reset spring 45 is sleeved on the valve core 41 and is limited and compressed between the annular boss 411 and the annular edge 401. In the reset state, under the elastic force of the reset spring 45, One end presses against the annular boss 411, causing the valve core 41 to be forced to move upward until the annular sealing ring 44 is pressed upward against the bottom of the annular edge 401, so that the annular sealing ring 44 seals the bottom opening of the funnel 40, so that the coffee liquid is retained in the brewing chamber 4; after the finished coffee accommodating cup 5 is placed directly below the brewing chamber 4 and aligned with it, the second magnet 43 is attracted by the magnetic force of the first magnet 58, driving the valve core 41 to be forced to move downward until the annular boss 411 is stuck and limited by the side wall of the inner cavity of the funnel 40. At this time, the annular sealing ring 44 is separated from the bottom of the annular edge 401, and the bottom opening of the funnel 40 is opened, so that the coffee liquid drips out through the liquid outlet 400.

[0037] Furthermore, the rear outer wall of the valve core 41 is provided with a second external thread 412. The cover 42 is connected to the second external thread 412 via its second internal thread 420, thereby being securely connected to the rear end of the valve core 41, facilitating assembly. Several drainage channels 413 are provided on the outer wall of the valve core 41, above the annular groove 415. These channels axially extend through the annular boss 411, allowing the coffee liquid in the funnel 40 to flow smoothly out through the bottom opening. Specifically, the coffee liquid in the funnel 40 communicates with the area above the annular sealing ring 44, preventing the valve core 41 from blocking the tapered neck above the bottom opening of the funnel 40. Specifically, the annular sealing ring 44 is an elastic element, which may be made of silicone or rubber.

[0038] The automatic drip switch device for a drip coffee machine of the present invention overcomes the drawbacks and shortcomings of the prior art. By providing a magnetic switch mechanism, the drip switch automatically opens only when the finished coffee cup is placed directly below and aligned with the brewing chamber, allowing the coffee liquid in the brewing chamber to drip into the finished coffee cup, allowing normal coffee brewing. When the finished coffee cup is removed from directly below the brewing chamber, the drip switch automatically resets and closes, thereby preventing uncontrolled dripping of the coffee liquid in the brewing chamber before it is fully brewed, thereby preventing contamination of the base. The device is convenient to use, allowing the finished coffee cup to be removed at any time during the brewing process to taste the brewed coffee and adjust the taste accordingly. This allows for easy brewing and tasting, without having to wait until the entire cup is brewed before drinking. The automatic drip switch device for a drip coffee machine of the present invention avoids contamination and is easy to use. It automatically stops dripping from the brewing chamber when the coffee cup is removed. Similarly, the drip coffee machine of the present invention also has the aforementioned beneficial effects and is a drip coffee machine with an automatic drip switch.

[0039] The present invention can be widely applied to the field of coffee brewing appliances.

Claims

1. An automatic drip switch device for a drip coffee machine, characterized by: The drip coffee machine comprises a brewing chamber (4) and a movable finished coffee holding cup (5), wherein the brewing chamber (4) comprises a funnel (40), and the finished coffee holding cup (5) comprises a cup body (51) and a cup cover (52). A liquid outlet (400) is provided at the center of the bottom of the brewing chamber (4), and a liquid inlet (500) is provided at the center of the cup cover (52). A liquid inlet pipe (53) is provided at the center of the cup cover (52) extending from the liquid inlet (500) to the bottom of the cup body (51), and a fixed magnetic attraction part is provided on the liquid inlet pipe (53) at the liquid inlet (500), and the fixed magnetic attraction part comprises a first magnet (58). An active magnetic attraction valve is provided at the bottom of the brewing chamber (4) at the liquid outlet (400), and the active magnetic attraction valve comprises a second magnet (43); only when the finished coffee holding cup (51) is in the state of being ... After the cup (5) is placed directly below the brewing chamber (4) and aligned with it, the first magnet (58) and the second magnet (43) are attracted by magnetic force, so that the movable magnetic valve moves downward, the bottom opening of the funnel (40) is in a non-sealed state, and the brewed coffee liquid drips out through the liquid outlet (400), flows into the liquid inlet pipe (53) through the liquid inlet (500) aligned with it, and finally enters the finished coffee holding cup (5); after the finished coffee holding cup (5) moves away from directly below the brewing chamber (4), the effective attractive magnetic force between the first magnet (58) and the second magnet (43) no longer exists, the movable magnetic valve automatically resets, the bottom opening of the funnel (40) is sealed, and the brewed coffee liquid is retained in the brewing chamber (4) to avoid dripping out.

2. The automatic drip switch device for a drip coffee machine according to claim 1, characterized in that: The fixed magnetic attraction component further comprises a magnet sleeve (55) and a plug (56); an inner cavity is provided at the center of the magnet sleeve (55); the first magnet (58) is placed in the inner cavity of the magnet sleeve (55); and the plug (56) is used to seal the bottom of the inner cavity of the magnet sleeve (55).

3. The automatic drip switch device for a drip coffee machine according to claim 2, characterized in that: The top of the magnet sleeve (55) is provided with a boss (550), and the outer wall is provided with a first external thread (57) so that the boss (550) can be held by hand and connected and fixed to the first internal thread (530) at the top of the liquid inlet pipe (53) through the external thread (57).

4. The automatic drip switch device for a drip coffee machine according to claim 2, characterized in that: The outer wall of the fixed magnetic component is provided with a plurality of drip channels (59) which penetrate the magnet sleeve (55) and the plug (56) in the axial direction, so that after the fixed magnetic component is connected and fixed to the liquid inlet pipe (53), the liquid inlet port (500) is communicated with the lower part of the liquid inlet pipe (53), and the brewed coffee liquid can drip into the cup body (51).

5. The automatic drip switch device for a drip coffee machine according to claim 1, characterized in that: An annular groove (54) is provided on the periphery of the cup cover (52), and a plurality of overflow liquid collecting ports (57) are provided in the annular groove along the circumferential direction and communicate with the interior of the cup body (51).

6. The automatic drip switch device for a drip coffee machine according to claim 1, characterized in that: The movable magnetic valve also includes a valve core (41), a cover (42), an annular sealing ring (44), and a reset spring (45). The head of the valve core (41) is provided with an annular boss (411), the middle is provided with an annular groove (415), and the center of the tail is provided with a core cavity (414). The second magnet (43) is placed in the core cavity (414). The cover (42) is connected to the tail of the valve core (41) to seal the bottom of the core cavity (414). The annular sealing ring (44) is sealed and sleeved on the annular groove (415). The bottom opening of the funnel (40) is provided with an inward-extending annular edge (401). The reset spring (45) is sleeved on the valve core (41) and is limitedly compressed between the annular boss (411) and the annular edge (401). In the reset state, under the elastic force of the reset spring (45), the valve core (41) is pressed against the annular boss (411). The second magnet (43) is attracted by the magnetic force of the first magnet (58) and drives the valve core (41) to move downward under force until the annular boss (411) is stuck and limited by the side wall of the inner cavity of the funnel (40). At this time, the annular seal ring (44) is separated from the bottom of the annular edge (401), and the bottom opening of the funnel (40) is opened, so that the coffee liquid drips out through the liquid outlet (400).

7. The automatic drip switch device for a drip coffee machine according to claim 6, characterized in that: The outer side wall of the tail of the valve core (41) is provided with a second external thread (412), and the cover (42) is connected to the second external thread (412) via its second internal thread (420) so as to be connected and fixed to the tail of the valve core (41).

8. The automatic drip switch device for a drip coffee machine according to claim 6, characterized in that: A plurality of drainage channels (413) are provided on the outer wall of the valve core (41) above the annular groove (415), and penetrate the annular boss (411) in the axial direction, so that the coffee liquid in the funnel (40) can flow out smoothly through the bottom opening.

9. The drip coffee maker according to claim 6, characterized in that: The annular sealing ring (44) is an elastic element made of silica gel or rubber.

10. A drip coffee machine, characterized by: The invention comprises a base (1), a body (2), a water tank (3) with a heating device, a brewing chamber (4), a movable finished coffee holding cup (5), a micro water pump (6), and an automatic drip switch device for a drip coffee machine according to any one of claims 1 to 8, wherein the body (2) is fixedly connected to the base (1), the water tank (3) is arranged above the body (2), the brewing chamber (4) is suspended in the air, and the side surface is fixedly connected to the water tank (3), the finished coffee holding cup (5) is placed on the base (1), the micro water pump (6) is arranged in the body (2), and the micro water pump (6) is used to pump the heated hot water in the water tank (3) into the brewing chamber (40) through a hot water outlet (7) located above the brewing chamber (4).

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