Beauty head and beauty instrument

By introducing a porous adsorption element and buffer cavity design into the beauty head, combined with negative pressure and vibration mechanisms, the problem of the beauty head's inability to deliver liquid evenly and stably is solved, stable delivery of essence is achieved, and costs are reduced.

CN223350810UActive Publication Date: 2025-09-19HANGZHOU ULIKE TECHNOLOGY CO LTD +1
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Patent Information

Application Number
CN202422267326.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2025-09-19
Estimated Expiration
2034-09-14

AI Technical Summary

Technical Problem

The beauty heads of existing beauty devices cannot deliver liquid evenly and stably, resulting in uneven or discontinuous delivery of essence liquid. High-precision liquid pumps or control valves are required, which increases manufacturing and R&D costs.

Method used

The adsorption element and buffer cavity design adopts a porous structure. The adsorption element is located in the buffer cavity. The adsorption element is a sponge block, a porous silica gel block or a porous ceramic block. A spring is provided in the buffer cavity to adjust the liquid output. Combined with the negative pressure mechanism and the vibration mechanism, the delivery speed and amount of the essence are controlled.

Benefits of technology

It achieves uniform and stable delivery of essence, avoids uneven or discontinuous problems caused by changes in supply volume, and reduces manufacturing and R&D costs.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to the technical field of skin care, and particularly discloses a beautifying head and a beautifying instrument, the beautifying head comprises a core tube, a liquid delivery pipe, a liquid delivery pipe and a liquid delivery pipe, the liquid outlet component is connected with the core pipe, and the liquid outlet component is matched with the core pipe to form a closed buffer cavity in a surrounding mode; the liquid outlet component is provided with a liquid outlet for communicating the buffer cavity with the external space of the beautifying head; and the adsorption element is of a porous structure, and the adsorption element is located in the buffer cavity. The beauty head and the beauty instrument provided by the utility model can effectively solve the problem that the conventional beauty head cannot uniformly and stably feed liquid.
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Description

Technical Field

[0001] The utility model relates to the technical field of skin care, in particular to a beauty head and a beauty instrument. Background Art

[0002] With rising living standards, people's demand for beauty and skincare is growing stronger. Among the many beauty and skincare products available, a device called a hydrating device non-invasively delivers moisture and nutrients (hereinafter referred to as "essence") to the skin's surface, achieving cosmetic benefits such as moisturizing, brightening, and improving skin texture. While hydrating devices are typically used in beauty salons or medical aesthetics clinics, there are also portable, home-use hydrating devices suitable for daily personal care.

[0003] The head of the existing beauty instrument is provided with a beauty head, and the beauty head is provided with a liquid outlet for the essence to pass through. After the user puts the beauty head close to the skin, the essence can be delivered to the human skin through the liquid outlet.

[0004] In the prior art, when the essence is driven into the beauty head, the beauty head will directly send the essence out through the liquid outlet. If the flow rate of the essence supplied to the beauty head increases, the essence sent out through the liquid outlet will also increase immediately; if the flow rate of the essence supplied to the beauty head decreases, the essence sent out through the liquid outlet will also decrease immediately.

[0005] In order to deliver the essence evenly and stably, the beauty head needs to be equipped with an essence supply system with higher control precision (such as a high-precision liquid pump or control valve, etc.), which will undoubtedly increase manufacturing and R&D costs.

[0006] Therefore, the present invention is dedicated to improving the existing beauty head to solve the problem that the existing beauty head cannot deliver liquid evenly and stably.

[0007] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0008] One purpose of the present invention is to provide a beauty head and a beauty instrument that can effectively solve the problem that existing beauty heads cannot deliver liquid evenly and stably.

[0009] To achieve the above objectives, the present invention provides a beauty head, comprising:

[0010] A core tube, wherein the core tube is provided with an inner liquid feeding hole;

[0011] a liquid outlet component, the liquid outlet component being connected to the core tube and cooperating with the core tube to surround and form a sealed buffer cavity; wherein the liquid outlet component is provided with a liquid outlet connecting the buffer cavity to the external space of the beauty head;

[0012] The adsorption element is a porous structure and is located in the buffer cavity.

[0013] Optionally, the adsorption element is a sponge block, a porous silica gel block, or a porous ceramic block.

[0014] Optionally, the core tube and the liquid outlet component are connected in a sliding and sealing manner, and a spring is further provided in the buffer cavity, respectively abutting against the core tube and the liquid outlet component;

[0015] Wherein, the spring is used to drive the liquid outlet component to move in a direction away from the adsorption element.

[0016] Optionally, the number of the spring is one, and the adsorption element is located in the hollow space of the spring;

[0017] Alternatively, the number of the springs is at least two, and the springs are evenly arranged around the adsorption element.

[0018] Optionally, the liquid outlet component is provided with an opening groove for inserting the core tube;

[0019] The core tube, the groove wall of the open groove, and the groove bottom of the open groove surround and form the buffer cavity.

[0020] Optionally, the liquid outlet component includes an application unit provided with the open groove, and a microneedle wafer located on a side of the application unit away from the adsorption element;

[0021] Wherein, the applying unit is provided with a unit through hole connected to the buffer cavity, and the liquid outlet is located on the microneedle wafer and is connected to the unit through hole.

[0022] Optionally, the circumferential surface of the core tube is provided with a sealing member that abuts against the groove wall of the open groove.

[0023] Optionally, the circumferential surface of the core tube is provided with a tube circumferential boss, and the groove wall of the open groove is provided with a groove wall limiting boss;

[0024] The groove wall limiting boss abuts against the surface of the tube circumferential boss facing away from the adsorption element to limit the core tube from being separated from the application unit through the notch of the open groove.

[0025] Optionally, a core holder is also included;

[0026] The core holder is provided with an inner cavity portion opening toward the adsorption element, an extension tube connecting the inner cavity portion to the outer space of the core holder, an inner-outer communication hole connecting the inner cavity portion to the outer space of the core holder, and a through-tube hole connecting the inner cavity portion to the outer space of the core holder;

[0027] Wherein, the core tube comprises:

[0028] a tube head, the tube head being sleeved on the core seat to cover the opening of the inner cavity;

[0029] A tube body, one end of which is fixed to the tube head, and the other end of which passes through the tube hole and extends to the external space of the inner cavity; wherein the liquid feeding hole in the tube is located in the tube body.

[0030] On the other hand, a beauty instrument is provided, comprising an outer cavity portion with an opening structure, any one of the beauty heads extending into the outer cavity portion, and a negative pressure mechanism for evacuating air from the outer cavity portion.

[0031] The beneficial effects of the present invention are: providing a beauty head and beauty instrument wherein, when the in-tube liquid delivery hole delivers essence to the buffer chamber, the essence first enters the internal pores of the adsorption element. Only after the internal pores of the adsorption element are filled with essence does the essence flow outward through the liquid outlet. During this process, the adsorption element has a multi-porous structure with a large liquid storage space, which can temporarily store the essence, thereby regulating the speed and amount of essence flowing out of the liquid outlet. In this way, even if the supply of essence through the in-tube liquid delivery hole fluctuates, the beauty head can ensure a relatively stable flow rate of essence delivered outward through the liquid outlet, thereby avoiding the problem of uneven or discontinuous essence delivery caused by fluctuations in supply.

[0032] Therefore, the beauty head and beauty instrument provided by the present invention can effectively solve the problem that the existing beauty heads cannot deliver liquid evenly and stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 A schematic diagram of the structure of a beauty instrument provided in an embodiment;

[0035] Figure 2 This is a schematic structural diagram of a beauty head provided in an embodiment.

[0036] In the picture:

[0037] 100, outer cavity; 200, negative pressure mechanism; 300, beauty head; 400, liquid outlet channel; 500, vibration mechanism; 600, container;

[0038] 1. Core tube; 101. Tube head; 1011. Tube peripheral boss; 102. Tube body; 1021. Liquid feeding hole in the tube;

[0039] 2. Liquid outlet component; 201. Application unit; 2011. Unit through hole; 2012. Slot wall limiting boss; 202. Microneedle wafer; 2021. Liquid outlet;

[0040] 3. Adsorption element;

[0041] 4. Buffer cavity;

[0042] 5. Spring;

[0043] 6. Core seat; 601. Inner cavity; 602. Extension tube; 603. Internal and external communication hole; 604. Pipe hole;

[0044] 7. Seals. DETAILED DESCRIPTION

[0045] References to "embodiments" in this utility model mean that the specific features, structures, or characteristics described in conjunction with the embodiments may be included in at least one embodiment of the utility model. The appearance of the term "embodiment" in various places in the specification does not necessarily refer to the same embodiment, nor does it specifically limit its independence or relevance to other embodiments. In principle, in this utility model, as long as there are no technical contradictions or conflicts, the various technical features mentioned in the various embodiments can be combined in any manner to form a corresponding implementable technical solution.

[0046] Unless otherwise defined, the technical terms used herein have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The use of relevant terms herein is only for describing specific embodiments and is not intended to limit the present invention.

[0047] In the description of this utility model, the term "and / or" is used to describe a logical relationship between objects, indicating that three relationships can exist. For example, A and / or B means: A exists, B exists, and both A and B exist. In addition, the character " / " in this document generally indicates that the objects before and after are in a logical "or" relationship.

[0048] In the present invention, terms such as "first" and "second" are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship of quantity, priority or sequence between these entities or operations.

[0049] Without further restrictions, in the present invention, the words "include", "comprise", "have" or other similar expressions used in sentences are intended to cover non-exclusive inclusion. These expressions do not exclude the presence of additional elements in the process, method or product including the elements, so that the process, method or product including a series of elements may include not only those limited elements, but also other elements not explicitly listed, or also include elements inherent to such process, method or product.

[0050] Consistent with the understanding in the Examination Guidelines, in this utility model, expressions such as "greater than," "less than," and "exceed" are understood to exclude the number itself; expressions such as "above," "below," and "within" are understood to include the number itself. Furthermore, in the description of the embodiments of this utility model, "multiple" means two or more (including two), and similar expressions related to "multiple," such as "multiple groups" and "multiple times," are also understood in this manner, unless otherwise specifically defined.

[0051] In the description of the embodiments of the present invention, the space-related expressions used, such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "vertical", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or position relationship based on the orientation or position relationship shown in the specific embodiments or drawings, and are only for the convenience of describing the specific embodiments of the present invention or facilitating the reader's understanding, and do not indicate or imply that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present invention.

[0052] Unless otherwise expressly specified or limited, in the description of the embodiments of the present invention, the terms "installed", "connected", "connected", "fixed", "set", etc. used should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integrated setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the technical field of the present invention, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0053] The utility model provides a beauty head and a beauty instrument, which are suitable for use in scenarios where human skin is cared for through essence liquid, and can effectively solve the problem that the existing beauty head cannot deliver liquid evenly and stably.

[0054] See also Figure 1 The beauty instrument provided in this embodiment includes an outer cavity 100 with an open structure, a negative pressure mechanism 200 for evacuating the outer cavity 100, a beauty head 300 extending into the outer cavity 100, a liquid outlet channel 400 for delivering essence to the beauty head 300, and a vibration mechanism 500 for driving the beauty head 300 to vibrate at a micro-distance.

[0055] In this embodiment, the essence is stored in the container 600. The container 600 is a component that can be sold or used independently of the beauty instrument. It is detachably connected to the beauty instrument by plugging and unplugging. After the container 600 is inserted into the beauty instrument, the liquid outlet channel 400 can connect the container 600 and the beauty head 300.

[0056] In some other embodiments, a liquid storage chamber for storing essence may be built into the beauty instrument, and the liquid outlet channel 400 directly connects the liquid storage chamber to the beauty head 300 .

[0057] The following describes the use of the beauty instrument using the example of storing the essence in the container 600:

[0058] S10: The beauty device is brought close to the human skin so that the human skin blocks the opening of the outer cavity 100. Next, the negative pressure mechanism 200 evacuates the outer cavity 100, causing the air pressure in the outer cavity 100 to drop below the internal air pressure of the container 600. Under the action of the pressure difference, the essence in the container 600 is transported to the beauty head 300 through the liquid outlet channel 400 and then delivered to the human skin through the liquid outlet 2021 of the beauty head 300.

[0059] S20: The vibration mechanism 500 drives the beauty head 300 to vibrate in a front-to-back direction. During the vibration, the beauty head 300 continuously stimulates the human skin, thereby enlarging the pores of the human skin and promoting the absorption of the essence by the human skin.

[0060] Optionally, the vibration mechanism 500 is a cam-link mechanism, or a linear drive mechanism, etc., which is not limited in this embodiment. Further, the linear drive mechanism can be a cylinder, a hydraulic cylinder, an electric cylinder, or a motor screw linear module.

[0061] The following is a detailed introduction to the beauty head 300 provided by the present invention.

[0062] See also Figure 2The beauty head 300 provided in this embodiment includes a core tube 1, a liquid outlet component 2, and an adsorption element 3. The core tube 1 is provided with an intra-tube liquid delivery hole 1021. The liquid outlet component 2 is connected to the core tube 1 and cooperates with the core tube 1 to form a sealed buffer chamber 4. The liquid outlet component 2 is provided with a liquid outlet 2021 that connects the buffer chamber 4 to the external space of the beauty head 300. The adsorption element 3 has a porous structure and is located within the buffer chamber 4.

[0063] The beauty head 300 and beauty instrument provided by the present invention, on the one hand, when the liquid delivery hole 1021 in the tube delivers the essence to the buffer chamber 4, the essence will first enter the internal holes of the adsorption element 3. When the internal holes of the adsorption element 3 are filled with the essence, the essence will flow out through the liquid outlet 2021. During this process, the adsorption element 3 is a multi-porous structure with a large liquid storage space, which can temporarily store the essence, thereby adjusting the speed and amount of the essence flowing out of the liquid outlet 2021. In this way, even if the supply of essence through the liquid delivery hole in the tube fluctuates, the beauty head 300 can ensure that the flow rate of the essence delivered outward through the liquid outlet is relatively stable, thereby avoiding the problem of uneven or discontinuous delivery of the essence due to changes in the supply amount;

[0064] On the other hand, when the negative pressure mechanism 200 vacuums the outer cavity 100, the adsorption element 3 can cache the essence in the buffer cavity 4, control the liquid output from the liquid outlet 2021, and avoid a large amount of essence flowing out directly through the liquid outlet 2021 and being directly sucked back by the negative pressure mechanism 200 in the outer cavity 100, resulting in waste of essence.

[0065] Optionally, the adsorption element 3 can be a porous component such as a sponge, porous silicone, or porous ceramic. These materials, due to their porous structure, possess strong liquid absorption capabilities. They can absorb and retain large amounts of essence, ensuring a more even and continuous delivery of the essence, without affecting the effectiveness of the application due to momentary flow rate fluctuations. Furthermore, soft materials such as sponges and porous silicone are skin-friendly and more comfortable to use.

[0066] Optionally, the core tube 1 and the liquid outlet component 2 are connected in a sliding and sealing manner, and a spring 5 is provided in the buffer chamber 4, which is respectively in contact with the core tube 1 and the liquid outlet component 2; wherein, the spring 5 is used to drive the liquid outlet component 2 to move in a direction away from the adsorption element 3.

[0067] The design of spring 5 allows the beauty head 300 to automatically adjust the amount of liquid delivered based on the amount of pressure applied to the skin. Specifically, spring 5 balances internal and external pressure. When external pressure decreases, spring 5 pushes on the liquid delivery component 2, reducing the amount of liquid delivered, and vice versa. This ensures stable delivery of essence, regardless of the force exerted by the user.

[0068] Optionally, the number of the spring 5 is one, and the adsorption element 3 is located in the hollow space of the spring 5. When the number of the spring 5 is one, the adsorption element 3 is located in the hollow space of the spring 5. Such a layout can effectively utilize space and improve the structural compactness of the beauty head 300.

[0069] Alternatively, there are at least two springs 5, each of which is evenly arranged around the adsorption element 3. For example, there are two springs 5, and the two springs 5 ​​are symmetrically arranged about the adsorption element 3. Alternatively, there are three springs 5, and the three springs 5 ​​are arranged in an equilateral triangle, with the adsorption element 3 located at the center of the equilateral triangle. Alternatively, there are four springs 5, and the four springs 5 ​​are arranged in a square, with the adsorption element 3 located at the center of the square. Evenly arranged springs 5 ​​can provide more stable support and pressure balance, ensuring uniform delivery of the essence.

[0070] In this embodiment, the beauty head 300 further includes a core holder 6. The core holder 6 is provided with an inner cavity 601 opening toward the adsorption element 3, an extension tube 602 connecting the inner cavity 601 to the negative pressure mechanism 200, an inner-outer communication hole 603 connecting the inner cavity 601 to the outer cavity 100, and a through-hole 604 connecting the inner cavity 601 to the space outside the core holder 6.

[0071] Accordingly, the core tube 1 comprises a tube head 101 and a tube body 102. The tube head 101 is sleeved onto the core base 6 to seal the opening of the inner cavity 601. One end of the tube body 102 is fixed to the tube head 101 and communicates with the buffer cavity 4. The other end passes through the tube hole 604 and extends to the space outside the inner cavity 601 to connect with the liquid outlet channel 400. The inner liquid delivery hole 1021 is located in the tube body 102.

[0072] When the negative pressure mechanism 200 is evacuating air, the air in the outer cavity 100 is sequentially pumped into the negative pressure mechanism 200 through the inner and outer connecting holes 603, the inner cavity 601, and the extension tube, thereby achieving a vacuum treatment of the outer cavity 100. When the internal air pressure of the outer cavity 100 drops, the essence in the container 600 can be transported to the adsorption element 3 of the buffer chamber 4 through the liquid outlet channel 400 and the liquid delivery hole 1021 in the tube.

[0073] In this embodiment, the liquid outlet component 2 includes an application unit 201 provided with an open groove, and a microneedle chip 202 located on the side of the application unit 201 away from the adsorption element 3; wherein, the application unit 201 is provided with a unit through hole 2011 connected to the buffer cavity 4, and the liquid outlet 2021 is located on the microneedle chip 202 and is connected to the unit through hole 2011.

[0074] The head of the core tube 1 is inserted into the open groove, wherein the core tube 1, the groove wall of the open groove, and the groove bottom of the open groove surround and form the buffer cavity 4. Furthermore, the circumferential surface of the head of the core tube 1 is provided with a sealing member 7 that abuts against the groove wall of the open groove.

[0075] The open slot design allows the core tube 1 to be inserted and forms a buffer chamber 4, which facilitates assembly and maintenance. When the vibration mechanism 500 drives the application unit 201 to repeatedly vibrate and press the human skin, the microneedle wafer 202 can help the essence penetrate the skin more deeply through the tiny needle holes.

[0076] Optionally, the circumferential surface of the head of the core tube 1 is provided with a tube-circumferential boss 1011, and the groove wall of the open groove is provided with a groove wall limiting boss 2012; wherein the groove wall limiting boss 2012 abuts against the surface of the tube-circumferential boss 1011 facing away from the adsorption element 3 to limit the core tube 1 from escaping from the application unit 201 through the notch of the open groove. The cooperation between the tube-circumferential boss 1011 and the groove wall limiting boss 2012 limits the movement of the core tube 1 relative to the liquid outlet component 2, ensuring the relative position stability between the two, thereby ensuring the stability of the essence delivery.

[0077] In summary, the beauty head 300 and the beauty instrument provided in this embodiment have the following advantages:

[0078] ① The porous adsorption element 3 can not only buffer the essence and adjust the speed and amount of the essence flowing out of the liquid outlet 2021, thereby ensuring the uniformity and stability of the essence delivery, but also control the liquid output under negative pressure, preventing the essence from being sucked out by the negative pressure mechanism 200, thereby reducing waste;

[0079] ② The design of spring 5 enables the beauty head 300 to automatically adjust the liquid output according to the skin contact pressure, ensuring stable delivery of the essence;

[0080] ③ The core seat 6, the core tube 1 and the liquid outlet component 2 are plugged in sequentially, and the assembly and disassembly are simple and convenient, and are easy to assemble and maintain.

[0081] Finally, it should be noted that although the above embodiments have been described in the specification and drawings of this application, this does not limit the scope of patent protection of this application. All technical solutions generated by replacing or modifying equivalent structures or equivalent processes based on the essential concepts of this application using the contents recorded in the specification and drawings of this application, as well as directly or indirectly implementing the technical solutions of the above embodiments in other related technical fields, are included in the scope of patent protection of this application.

Claims

1. A beauty head, characterized in that: include: A core tube (1), wherein the core tube (1) is provided with an inner liquid feeding hole (1021); a liquid outlet component (2), the liquid outlet component (2) being connected to the core tube (1) and cooperating with the core tube (1) to surround and form a sealed buffer cavity (4); wherein the liquid outlet component (2) is provided with a liquid outlet (2021) communicating with the buffer cavity (4) to the external space of the beauty head (300); An adsorption element (3), wherein the adsorption element (3) is a porous structure, and the adsorption element (3) is located in the buffer cavity (4).

2. The beauty head according to claim 1, characterized in that: The adsorption element (3) is a sponge block, a porous silica gel block, or a porous ceramic block.

3. The beauty head according to claim 1, characterized in that: The core tube (1) and the liquid outlet component (2) are connected in a sliding and sealing manner, and a spring (5) is provided in the buffer cavity (4) and abuts against the core tube (1) and the liquid outlet component (2) respectively. The spring (5) is used to drive the liquid outlet component (2) to move in a direction away from the adsorption element (3).

4. The beauty head according to claim 3, characterized in that: The number of the spring (5) is one, and the adsorption element (3) is located in the hollow space of the spring (5); Alternatively, the number of the springs (5) is at least two, and the springs (5) are evenly arranged around the adsorption element (3).

5. The beauty head according to claim 1, characterized in that: The liquid outlet component (2) is provided with an open groove for the core tube (1) to be inserted; The core tube (1), the groove wall of the open groove, and the groove bottom of the open groove surround and form the buffer cavity (4).

6. The beauty head according to claim 5, characterized in that: The liquid outlet component (2) comprises an application unit (201) provided with the opening groove, and a microneedle wafer (202) located on a side of the application unit (201) away from the adsorption element (3); The application unit (201) is provided with a unit through hole (2011) connected to the buffer chamber (4), and the liquid outlet (2021) is located on the microneedle wafer (202) and is connected to the unit through hole (2011).

7. The beauty head according to claim 6, characterized in that: The circumferential surface of the core tube (1) is sleeved with a sealing member (7) that abuts against the groove wall of the open groove.

8. The beauty head according to claim 7, characterized in that: The circumferential surface of the core tube (1) is provided with a tube circumferential boss (1011), and the groove wall of the open groove is provided with a groove wall limiting boss (2012); The groove wall limiting boss (2012) abuts against the surface of the tube circumferential boss (1011) facing away from the adsorption element (3), so as to limit the core tube (1) from escaping from the application unit (201) through the notch of the open groove.

9. The beauty head according to claim 1, characterized in that: Also includes a core seat (6); The core seat (6) is provided with an inner cavity portion (601) opening toward the adsorption element (3), an extension tube (602) connecting the inner cavity portion (601) to the outer space of the core seat (6), an inner and outer communication hole (603) connecting the inner cavity portion (601) to the outer space of the core seat (6), and a through-tube hole (604) connecting the inner cavity portion (601) to the outer space of the core seat (6); Wherein, the core tube (1) comprises: a tube head (101), the tube head (101) being sleeved on the core seat (6) to cover the opening of the inner cavity (601); A tube body (102), one end of the tube body (102) is fixedly connected to the tube head (101), and the other end passes through the tube hole (604) and extends to the external space of the inner cavity (601); wherein the liquid delivery hole (1021) in the tube is located in the tube body (102).

10. A beauty instrument, comprising an outer cavity (100) with an open structure, a beauty head (300) according to any one of claims 1 to 9 extending into the outer cavity (100), and a negative pressure mechanism (200) for evacuating air from the outer cavity (100).