Capsule puncturing needle and capsule puncturing assembly

Abstract

The embodiment of the utility model provides a capsule puncture needle and a capsule puncture assembly, the capsule puncture needle comprises a needle body, the needle body is internally provided with a water channel along the axial direction, the lower end of the water channel is blocked, the upper end of the water channel penetrates to the top end of the needle body and forms a water inlet, and the peripheral side of the lower part of the needle body is provided with at least one water outlet hole communicated with the water channel; the puncturing head is arranged at the lower end of the needle body and is used for puncturing the membrane surface of the capsule; and the filter screen is provided with filter holes which allow the liquid to pass through and stop the beverage powder from passing through, and the filter screen is arranged on the part, provided with the water outlet hole, of the needle body, so that the liquid from the water outlet hole enters the capsule through the filter holes in the filter screen. The filter screen is additionally arranged on the needle body, liquid for brewing can only enter the capsule through the filter holes in the filter screen, beverage powder in the capsule cannot flow back to the needle body and a corresponding pipeline through the filter holes, and the problems of needle blocking and pipe blocking are avoided. Moreover, the structure is very reasonable, the assembly is simple, the fixation is reliable, the applicability is wide, and the manufacturing cost is low.

Description

Technical Field

[0001] The present application relates to the technical field of beverage production, and particularly to a capsule puncturing needle and a capsule puncturing assembly. Background Art

[0002] At present, the water outlet needle (or puncturing needle) used to puncture the capsule during the operation of the existing beverage machine with capsules is prone to powder suction. Especially for K-CUP (coffee capsule) coffee machines, when the heating tube heats water and discharges water for brewing, the hot water expands by heating and enters the capsule through the water outlet needle. During this process, coffee powder is sucked back into the internal pipeline of the coffee machine through the water outlet needle, resulting in pipeline blockage and the entire machine being unable to work.

[0003] Chinese Patent Application with Publication No. CN 107951395 A discloses a puncturing mechanism and a beverage brewing device. The puncturing mechanism includes a main body, a puncturing assembly and a funnel assembly arranged on the main body. The puncturing assembly includes a puncturing needle. When the puncturing needle moves downward, it can puncture the capsule, and hot water flows into the capsule through the water outlet at the lower end of the puncturing needle to brew the beverage powder. Since the water outlet at the lower end of the puncturing needle is relatively large, it is easy to have the problem of beverage powder backflow during brewing, resulting in pipeline blockage. Utility Model Content

[0004] In view of the above problems existing in the prior art, the purpose of the embodiments of the present application is to provide a capsule puncturing needle that prevents powder suction and a capsule puncturing assembly having the capsule puncturing needle.

[0005] The technical solution adopted in the embodiments of the present application is a capsule puncturing needle, including:

[0006] A needle body, in which a water channel is axially arranged. The lower end of the water channel is blocked, and the upper end of the water channel penetrates to the top of the needle body and forms a water inlet. At least one water outlet hole communicating with the water channel is arranged on the circumferential side of the lower part of the needle body;

[0007] A puncturing head, which is arranged at the lower end of the needle body and is used to puncture the film surface of the capsule;

[0008] A filter screen, on which filter holes allowing liquid to pass through while blocking beverage powder are arranged. The filter screen is arranged on the part of the needle body where the water outlet holes are arranged, so that the liquid coming out of the water outlet holes all enters the capsule through the filter holes on the filter screen.

[0009] By arranging the water outlet holes on the circumferential side and setting a filter screen at the position corresponding to the water outlet holes, the present application can prevent the coffee powder in the capsule from flowing back into the needle body and the pipeline of the water supply system, and avoid the residue and blockage of the coffee powder in the needle body and the pipeline.

[0010] In an alternative embodiment, an annular groove is provided on the outer periphery of the lower part of the needle body, and at least one water outlet hole is opened at the bottom of the annular groove;

[0011] The filter screen is cylindrical and sleeved on the bottom of the annular groove to block at least one water outlet hole. By providing the annular groove, it is convenient to inlay and fix the filter screen on the needle body.

[0012] In an alternative embodiment, the shape of the puncturing head is conical, wedge-shaped or triangular prism-shaped. Designing the puncturing head into different shapes can adapt to the puncturing effects of different capsules.

[0013] In an alternative embodiment, the puncturing head includes a cylinder, the bottom surface of the cylinder is recessed towards the direction of the cylinder to form an arc surface, and the opposite sides of the bottom end of the puncturing head respectively form tips. The puncturing effect is excellent and the use experience is good.

[0014] In an alternative embodiment, at least one hole that allows liquid to pass through while blocking beverage powder is provided at the bottom of the puncturing head to meet the brewing requirements in different situations.

[0015] In an alternative embodiment, the aperture of the filter hole is 0.2 mm - 0.5 mm. The size of the filter hole is appropriate, which can not only allow liquid to pass through smoothly to meet the brewing requirements, but also block beverage powder (particles) from passing through to avoid clogging the needle body and related pipelines.

[0016] In an alternative embodiment, the aperture of the water outlet hole is 4 to 10 times the aperture of the filter hole. Designing the aperture of the water outlet hole to be much larger than that of the filter hole can enable the liquid to flow out smoothly when the number of water outlet holes is set to 2 - 3, which is relatively small.

[0017] In an alternative embodiment, the needle body is cylindrical, an assembly part with an outer diameter larger than the outer diameter of the needle body is provided at the top of the needle body, the cross-section of the assembly part in the axial direction perpendicular to the needle body is D-shaped, an annular groove is provided on the assembly part around its circumferential direction, and the needle body can be assembled and limited on the needle body bracket through the assembly part.

[0018] In an alternative embodiment, the puncturing head and the needle body are of an integral structure. It is convenient to reduce the number of parts and the processing is easy.

[0019] A capsule puncturing assembly includes:

[0020] A connecting pipe, which includes a connected connecting part and a pipe body part, the inner diameter of the cavity formed in the connecting part is larger than the inner diameter of the lumen of the pipe body part, and the cavity of the connecting part is communicated with the lumen of the pipe body part;

[0021] The needle body bracket has an annular cavity at its top for inserting the connecting part of the connecting pipe and a plug connector for extending into the cavity of the connecting part. The annular cavity is arranged around the plug connector. The bottom end of the needle body bracket contracts inward and extends downward to form a protruding part. A communicating channel is provided in the protruding part and the plug connector, and the upper end of the channel communicates with the cavity of the connecting part.

[0022] For the capsule puncturing needle in any of the above embodiments, the assembly part at the top of the needle body of the capsule puncturing needle is assembled in the channel in the protruding part and is positioned by forming a concave-convex fit through the annular groove.

[0023] The first sealing ring is arranged between the connecting part and the plug connector to prevent the liquid entering from the connecting pipe from leaking between the connecting part and the plug connector.

[0024] The second sealing ring is tightly sleeved on the needle body and is located above the filter screen and close to the top of the needle body. After the puncturing head punctures the membrane surface of the capsule and the lower part of the needle body extends into the capsule, the second sealing ring squeezes and abuts against the membrane surface to prevent the beverage powder and liquid in the capsule from leaking out through the puncturing holes on the membrane surface.

[0025] The structure of this capsule puncturing assembly is reasonable, which can smoothly introduce external liquid into the capsule, and at the same time can prevent coffee powder from being sucked into the capsule puncturing needle, avoiding problems such as needle clogging or corresponding pipeline blockage.

[0026] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows: By adding a filter screen on the needle body in the present application, the water (liquid) discharged from the needle body can only enter the capsule through the filtering holes on the filter screen, and the coffee powder (beverage powder) in the capsule cannot flow back through the filtering holes into the internal pipelines of the needle body and the liquid supply (water supply) system, avoiding problems of needle clogging and pipe blockage. Moreover, its structure is very reasonable, the assembly is simple, the fixation is reliable, the applicability is wide, and the manufacturing cost is low.

[0027] It should be understood that the foregoing general description and the following detailed description are both exemplary and explanatory and are not intended to limit the present application.

[0028] The overview of various implementations or examples of the technology described in the present application is not a full disclosure of the entire scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In the accompanying drawings, which are not necessarily drawn to scale, the same reference numerals may describe similar components in different views. The drawings generally illustrate various embodiments by way of example and not limitation, and together with the description and the claims are used to explain the embodiments claimed. Where appropriate, the same reference numerals are used throughout the drawings to refer to the same or similar parts.

[0030] Figures 1 to 5 Respectively, they are schematic perspective views of the capsule puncturing needle according to the embodiments of the present application.

[0031] Figure 6 and Figure 7 It is a schematic perspective view of the separation of the filter screen and the needle body according to the embodiments of the present application.

[0032] Figure 8 It is a schematic perspective view of the capsule puncturing assembly according to the embodiments of the present application.

[0033] Figure 9 It is a cross-sectional view of the capsule puncturing assembly according to the embodiments of the present application.

[0034] Figure 10 It is an exploded view of the capsule puncturing assembly according to the embodiments of the present application.

[0035] Reference numerals:

[0036] 1 - needle body; 11 - water channel; 12 - annular groove; 13 - water outlet hole; 14 - assembly part; 15 - annular groove;

[0037] 2 - puncturing head; 21 - hole;

[0038] 3 - filter screen; 31 - filtering hole;

[0039] 4 - connecting pipe; 41 - connecting part; 411 - cavity; 42 - pipe body part; 421 - pipe cavity;

[0040] 5 - needle body support; 51 - annular cavity; 52 - plug connector;

[0041] 6 - first sealing ring; 7 - second sealing ring; 8 - capsule. Detailed implementation manners

[0042] In order to make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the described embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the scope of protection of the present application.

[0043] Unless otherwise defined, technical terms or scientific terms used in this application shall have the ordinary meanings understood by those of ordinary skill in the art to which this application pertains. The terms "first", "second" and similar words used in this application do not denote any order, quantity or importance, but are only used to distinguish different components. Words such as "comprising" or "including" mean that the elements or objects appearing before this word cover the elements or objects listed after this word and their equivalents, without excluding other elements or objects. Words such as "connected" or "coupled" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. Words such as "upper", "lower", "left" and "right" are only used to indicate relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0044] To keep the following description of the embodiments of this application clear and concise, detailed descriptions of known functions and known components are omitted in this application.

[0045] As Figures 1 to 5 shown, an embodiment of this application provides a capsule puncturing needle. The capsule puncturing needle includes a needle body 1, a puncturing head 2 and a filter screen 3.

[0046] As Figures 1 to 7 shown, a water channel 11 is axially provided in the needle body 1. The upper end of the water channel 11 penetrates through to the top end of the needle body 1 and forms a water inlet. The lower end of the water channel 11 is blocked, that is, the water channel 11 does not penetrate through to the lower end of the needle body 1. At least one water outlet hole 13 communicating with the water channel 11 is provided on the circumferential side of the lower part of the needle body 1, and the liquid entering the water channel 11 from the water inlet is discharged outwards through the water outlet hole 13. The filter screen 3 is provided with filter holes 31 that allow liquid to pass through while blocking beverage powder from passing through. The filter screen 3 is provided on the part of the needle body 1 where the water outlet hole 13 is provided, so that the liquid coming out of the water outlet hole 13 enters the capsule 8 through the filter holes 31 on the filter screen 3. The puncturing head 2 is provided at the lower end of the needle body 1 and is used for puncturing the membrane surface of the capsule 8, so that at least the lower part of the puncturing head 2 and the needle body 1 extends into the capsule 8.

[0047] In the embodiment of this application, the water outlet hole 13 of the needle body 1 is provided on the circumferential side, and the filter screen 3 is provided at the position corresponding to the water outlet hole 13, and the filter holes 31 on the filter screen 3 can only allow liquid to pass through while blocking beverage powder from passing through. In this way, it is possible to prevent the coffee powder in the capsule 8 from flowing back through the filter holes 31 into the water channel 11 of the needle body 1 and then into the internal pipeline of the liquid supply system connected to the water inlet of the needle body 1, thus causing the problem of needle clogging or internal pipeline blockage.

[0048] The needle body 1 can be cylindrical, and the water channel 11 in the needle body 1 is in a straight line extending along its axis direction, which can ensure smooth liquid flow. The number of the water outlet holes 13 at the lower part of the needle body 1 can be one or more.Figure 6 A water outlet hole 13 is shown in Figure 7 Two water outlet holes 13 are shown in. When there are multiple water outlet holes 13, the multiple water outlet holes 13 can be evenly arranged around the circumference of the needle body 1 to make the water outlet uniform and improve the taste of the brewed beverage.

[0049] In some embodiments, as Figure 6 and Figure 7 shown, an annular groove 12 is provided on the outer periphery of the lower part of the needle body 1, and at least one water outlet hole 13 is opened at the bottom of the annular groove 12. The filter screen 3 is in a cylindrical shape and sleeved on the bottom of the annular groove 12 to block at least one water outlet hole 13. By providing the annular groove 12, it is convenient to inlay and fix the filter screen 3 on the needle body 1.

[0050] It can be understood that the so-called bottom of the annular groove 12 refers to the outer peripheral surface of the lower part of the needle body 1. That is, the needle body 1 is a cylinder with a variable diameter structure, and the outer diameter of the lower part of the needle body 1 is smaller than the outer diameter of its upper part and the maximum outer diameter of the piercing head 2, and an annular groove 12 is formed between the upper part of the needle body 1 and the piercing head 2.

[0051] The shape of the piercing head 2 is not limited, as long as it has a tip that can pierce the film surface of the capsule 8. In order to adapt to the piercing effects of different capsules 8, for example, the shape of the piercing head 2 can be conical, wedge-shaped or triangular prism-shaped, etc. Among them, Figure 2 the piercing head 2 of the capsule piercing needle shown in Figure 3 is conical, Figure 4 the piercing head 2 of the capsule piercing needle shown in

[0052] is wedge-shaped, Figure 1 and the piercing head 2 of the capsule piercing needle shown in

[0053] is triangular prism-shaped. Figure 5 The piercing head 2 can also be a shape formed by cutting chips from one end of the cylinder close to its connection with the needle body 1 towards the end away from the needle body 1, as shown in Figure 5 The chip surface can be an arc surface. Among them, the degree of chip removal gradually increases from the end close to the needle body 1 towards the end away from the needle body 1, so that a tip for piercing the capsule 8 is formed at its end away from the needle body 1.

[0054] Optionally, as Figure 5As shown, at least one hole 2 may be provided at the bottom of the piercing head 2, and the aperture of the hole 2 is comparable to that of the filtering hole 31, and only liquid can pass through while beverage powder can be blocked. Thus, by providing the hole 2 on the piercing head 2, liquid can be discharged to meet the brewing requirements in different situations. However, the hole 2 is a small hole that can block the beverage powder (particles) inside the capsule 8 from entering, avoiding the problems of powder suction, needle clogging, and pipeline clogging.

[0055] In some embodiments, as Figures 1 to 7 shown, the filter screen 3 is covered with filtering holes 31 so that the water coming out of the water outlet hole 13 can be discharged from the needle body 1 evenly and quickly to brew the beverage powder in the capsule 8.

[0056] To prevent the beverage powder from passing through the filtering holes 31, the aperture of the filtering holes 31 should be larger than the particle size of the beverage powder. Among them, the aperture of the filtering holes 31 can be 0.2 mm - 0.5 mm. The filtering holes 31 in this size range have a better effect on coffee capsules. It can be understood that the specific aperture of the filtering holes 31 can also be adjusted according to different types of capsules. The aperture of the water outlet hole 13 can be set much larger than that of the filtering holes 31 so that the liquid entering the water channel 11 of the needle body 1 can be discharged at a faster speed. For example, the aperture of the water outlet hole 13 can be designed to be 4 to 10 times the aperture of the filtering holes 31.

[0057] In some embodiments, continuing to combine Figures 1 to 7 , the needle body 1 is cylindrical, and an assembly part 14 with an outer diameter larger than that of the needle body 1 is provided at the top of the needle body 1. The cross-section of the assembly part 14 in the axial direction perpendicular to the needle body 1 is D-shaped, and an annular groove 15 is provided around the circumferential direction of the assembly part 14 so that the needle body 1 can be assembled and positioned on the needle body bracket 5 (to be introduced below) through the assembly part 14.

[0058] Optionally, the piercing head 2 and the needle body 1 can be an integral structure to facilitate the reduction of parts and manufacturing. The piercing head 2 and the needle body 1 can both be hardware parts.

[0059] As Figures 8 to 10 shown, the embodiment of the present application also discloses a capsule piercing assembly. The capsule piercing assembly includes a connecting pipe 4, a needle body bracket 5, a first sealing ring 6, a second sealing ring 7, and the capsule piercing needle in any of the above embodiments. Among them, Figure 8 and Figure 9 the arrow directions in represent the flow direction of the liquid.

[0060] As Figure 9 shown, the connecting pipe 4 includes a connected connecting part 41 and a pipe body part 42. The inner diameter of the cavity 411 formed in the connecting part 41 is larger than the inner diameter of the pipe cavity 421 of the pipe body part 42, and the cavity 411 of the connecting part 41 is communicated with the pipe cavity 421 of the pipe body part 42. AsFigure 9 and Figure 10 As shown in Figure 10 , at the top end of the needle body bracket 5, there is an annular cavity 51 for inserting the connecting portion 41 of the connecting pipe 4, and a plug connector 52 for extending into the cavity 411 of the connecting portion 41. The annular cavity 51 is arranged around the plug connector 52. The bottom end of the needle body bracket 5 contracts inward and extends downward to form a protruding portion. A communicating channel is provided in the protruding portion and the plug connector 52. The upper end of the channel communicates with the cavity 411 of the connecting portion 41. The assembling portion 14 at the top of the needle body 1 is assembled in the channel within the protruding portion and is positioned by forming a concave-convex fit through the annular groove 15.

[0061] As Figure 9 shown in Figure 9 , a first sealing ring 6 is arranged between the connecting portion 41 and the plug connector 52 to block the leakage of the liquid entering from the connecting pipe 4 between the connecting portion 41 and the plug connector 52.

[0062] Continuing to combine with Figure 9 , a second sealing ring 7 is tightly sleeved on the needle body 1, and is located above the filter screen 3 and close to the top of the needle body 1. After the puncturing head 2 punctures the membrane surface of the capsule 8 and the lower part of the needle body 1 extends into the capsule 8, the second sealing ring 7 is squeezed and abutted against the membrane surface to block the leakage of the beverage powder and liquid in the capsule 8 from the puncturing holes on the membrane surface.

[0063] The installation process of the capsule puncturing assembly in the embodiment of the present application is as follows: First, the filter screen 3 is inlaid and sleeved in the annular groove 12 at the lower part of the needle body 1. Then, the top of the needle body 1 is fixed inside the lower end of the needle body bracket 5 (the needle body 1 is generally made of metal, and the needle body bracket 5 is made of plastic. The top of the needle body 1 is inserted into the lower end of the needle body bracket 5 by deforming the needle body bracket 5. Or the needle body bracket 5 is directly injection-molded on the top of the needle body 1. Due to the existence of the annular groove 15 at the top of the needle body 1, the combination of the needle body 1 and the needle body bracket 5 is stable). Then, the first sealing ring 6 is arranged at the bottom of the annular cavity 51. Next, the connecting portion 41 of the connecting pipe 4 is fixed on the upper end of the needle body bracket 5, and the bottom end of the connecting portion 41 presses the first sealing ring 6. Finally, the second sealing ring 7 is sleeved on the needle body 1. When the capsule puncturing needle punctures the capsule 8 and the lower part of the needle body 1 and the middle part of the needle body 1 close to its lower part both extend into the capsule 8, the second sealing ring 7 is squeezed and abutted against the membrane surface. Refer to Figure 9 , the second sealing ring 7 cooperates with the capsule 8 for sealing. Water enters the capsule puncturing needle through the connecting pipe 4 and enters the inside of the capsule 8 through the filtering holes 31 of the filter screen 3 for brewing or making.

[0064] The capsule puncturing assembly of the embodiment of the present application can be used on a capsule coffee machine. The beverage powder contained in the capsule 8 is coffee powder, and the free end of the tube body 42 is connected to the water supply system of the capsule coffee machine. When brewing capsule coffee is required, the water supply system sends brewing water into the connecting tube 4. The brewing water enters the capsule puncturing needle through the channel of the needle body support 5, is discharged from the water outlet hole 13, and then is sprayed onto the coffee powder in the capsule 8 through the filter screen 3, realizing coffee brewing. When back suction occurs during the brewing process, the fine coffee powder is blocked in the capsule 8 by the filter screen 3 and will not be sucked into the inside of the capsule puncturing needle, thus avoiding the problems of needle clogging or blockage of the internal pipeline of the water supply system.

[0065] The above description is intended to be illustrative and not restrictive. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Moreover, the above examples (or one or more of their aspects) can be used in combination with each other, and it is contemplated that these embodiments can be combined with each other in various combinations or permutations.

Claims

1. A capsule puncturing needle, characterized in that: include: A needle body (1) is provided with a water channel (11) in the axial direction, the lower end of the water channel (11) is blocked, the upper end of the water channel (11) is connected to the top of the needle body (1) and forms a water inlet, and at least one water outlet (13) connected to the water channel (11) is provided on the circumferential side of the lower part of the needle body (1); A piercing head (2), which is arranged at the lower end of the needle body (1) and is used to pierce the membrane surface of the capsule (8); A filter screen (3) is provided with filter holes (31) that allow liquid to pass through but block the beverage powder from passing through. The filter screen (3) is provided on the portion of the needle body (1) where the water outlet hole (13) is provided, so that the liquid coming out of the water outlet hole (13) passes through the filter holes (31) on the filter screen (3) and enters the capsule (8).

2. The capsule piercing needle according to claim 1, characterized in that: An annular groove (12) is provided on the outer periphery of the lower part of the needle body (1), and at least one water outlet hole (13) is opened at the bottom of the annular groove (12); The filter screen (3) is cylindrical and is sleeved on the bottom of the annular groove (12) to cover at least one of the water outlet holes (13).

3. The capsule piercing needle according to claim 1, characterized in that: The shape of the piercing head (2) is conical, wedge-shaped or rhombus-shaped.

4. The capsule piercing needle according to claim 1, characterized in that: The puncturing head (2) comprises a cylinder, the bottom surface of which is concave toward the cylinder to form an arc surface, and the opposite sides of the bottom end of the puncturing head (2) form pointed ends respectively.

5. The capsule piercing needle according to claim 1, characterized in that: The bottom of the piercing head (2) is provided with at least one hole (21) which allows liquid to pass through but blocks beverage powder from passing through.

6. The capsule piercing needle according to claim 1, characterized in that: The pore diameter of the filtering hole (31) is 0.2 mm-0.5 mm.

7. The capsule piercing needle according to claim 6, characterized in that: The aperture of the water outlet hole (13) is 4 to 10 times the aperture of the filtering hole (31).

8. The capsule piercing needle according to claim 1, characterized in that: The needle body (1) is cylindrical, and a mounting portion (14) having an outer diameter greater than the outer diameter of the needle body (1) is provided at the top of the needle body (1); the mounting portion (14) is D-shaped in cross section in a direction perpendicular to the axial direction of the needle body (1), and an annular groove (15) is provided on the mounting portion (14) around the circumference thereof; the needle body (1) can be assembled and limited on the needle body bracket (5) through the mounting portion (14).

9. The capsule piercing needle according to claim 1, characterized in that: The puncturing head (2) and the needle body (1) are an integrated structure.

10. A capsule puncturing assembly, characterized in that: include: A connecting tube (4), comprising a connecting portion (41) and a tube body (42) connected to each other, wherein the inner diameter of a cavity (411) formed in the connecting portion (41) is greater than the inner diameter of a tube cavity (421) of the tube body (42), and the cavity (411) of the connecting portion (41) is in communication with the tube cavity (421) of the tube body (42); A needle support (5), the top end of which is provided with an annular cavity (51) for inserting the connecting portion (41) of the connecting tube (4) and a plug connector (52) for extending into the cavity (411) of the connecting portion (41), wherein the annular cavity (51) is arranged around the plug connector (52); the bottom end of the needle support (5) contracts inwards and extends downwards to form a protruding portion, wherein a communicating channel is provided in the protruding portion and the plug connector (52), and the upper end of the channel is communicated with the cavity (411) of the connecting portion (41); The capsule puncturing needle according to any one of claims 1 to 9, wherein the assembly portion (14) at the top of the needle body (1) of the capsule puncturing needle is assembled in the channel in the protruding portion, and is positioned by forming a concave-convex fit through the annular groove (15); a first sealing ring (6), which is provided between the connecting portion (41) and the plug connector (52) and is used to prevent the liquid entering through the connecting pipe (4) from leaking between the connecting portion (41) and the plug connector (52); The second sealing ring (7) is tightly mounted on the needle body (1) and is located above the filter screen (3) and close to the top of the needle body (1), so that when the piercing head (2) pierces the membrane surface of the capsule (8), and the lower part of the needle body (1) extends into the capsule (8), the second sealing ring (7) is pressed and pressed against the membrane surface, so as to prevent the beverage powder and liquid in the capsule (8) from leaking out through the pierced hole on the membrane surface.

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