Air coupling ultrasonic transducer and mask type ultrasonic infiltration promotion equipment

Abstract

The utility model relates to the technical field of beauty and skin care, and provides an air coupling ultrasonic transducer and a mask type ultrasonic infiltration promotion device, the air coupling ultrasonic transducer comprises a packaging shell, a lining, piezoelectric ceramics, a matching layer and a connector, the lining is arranged in the packaging shell, the piezoelectric ceramics and the matching layer are both arranged in the lining, and the connector is arranged in the packaging shell. The peripheral edge of the piezoelectric ceramic abuts against the inner wall of the lining, and the matching layer is located on the piezoelectric ceramic. The connector is arranged on one side, opposite to the piezoelectric ceramic, of the packaging shell and is connected with the piezoelectric ceramic through a wire; wherein the ultrasonic transducer directly performs acoustic coupling through air, and is used for emitting ultrasonic waves in the direction perpendicular to the face of a user of the mask type ultrasonic permeation enhancing equipment under the excitation of an electric signal, so that percutaneous permeation and absorption of a skin care product can be promoted; and the risks of poor infiltration promotion effect, skin injury and the like caused by untight attachment of the existing ultrasonic infiltration promotion product are avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of beauty and skin care, in particular to an air-coupled ultrasonic transducer and a mask-type ultrasonic permeation promoting device. Background Art

[0002] In the field of beauty and skin care, facial masks, as an indispensable product form, are deeply favored by consumers due to their convenience and the characteristic of directly acting on the skin. In the current market, pharmaceutical facial masks occupy a significant share of the facial mask market. They mainly soak a pharmaceutical nutrient solution into carrier materials such as non-woven fabrics, and utilize the contact between the skin and the facial mask to achieve the transdermal penetration of pharmaceutical ingredients and moisture in a natural state, and then be absorbed by the skin tissue to achieve beauty effects such as nourishing, moisturizing, and anti-aging. However, traditional pharmaceutical facial masks face many challenges during use. First of all, due to the limitation of the skin cell structure, the direct contact method often leads to low absorption efficiency of drugs and nutritional components, slow absorption speed, and it takes a long time to show effects. This not only prolongs the user's use time, but also causes waste of precious ingredients such as hyaluronic acid and collagen in the facial mask, and fails to fully exert their due beauty effects.

[0003] With the development of technology, the potential of ultrasonic technology in promoting the transdermal penetration of drugs has been gradually explored and applied in the medical and beauty fields. Ultrasonic waves can significantly improve the permeability of skin cells, widen the cell gaps, promote blood vessel dilation, accelerate blood circulation and cell metabolism through its unique biological effects such as cavitation effect, sonoporation effect, mechanical effect, and thermal effect, thereby effectively enhancing the transdermal absorption efficiency of drugs. Although there are already some skin care product import devices based on ultrasonic technology on the market, most of these devices are handheld small devices that require users to manually move them repeatedly on the face. The operation is cumbersome and it is difficult to ensure uniform coverage of the entire face, which affects the use experience and effect.

[0004] In addition, although mask-type ultrasonic permeation promoting devices made of flexible materials have emerged in recent years in an attempt to solve the problems of portability and easy operation, such devices still rely on immersing the ultrasonic transducer in water or other acoustic coupling media for operation, and have extremely high requirements for the degree of fit. Once the fit is not tight, there is a risk of failing to achieve the effect of promoting drug penetration and causing damage to the human skin.

[0005] Therefore, it is necessary to provide a new technical solution to solve the above technical problems. Summary of the Utility Model

[0006] The utility model provides an air-coupled ultrasonic transducer and a mask-type ultrasonic permeation promoting device, aiming to solve at least one of the above technical problems.

[0007] The present utility model provides an air-coupled ultrasonic transducer for a mask-type ultrasonic penetration enhancement device, comprising:

[0008] A packaging shell;

[0009] A bushing disposed within the packaging shell;

[0010] A piezoelectric ceramic disposed within the bushing, and the four peripheral edges of the piezoelectric ceramic are in contact with the inner wall of the bushing;

[0011] A matching layer disposed within the bushing and located on the piezoelectric ceramic;

[0012] A connector disposed on a side of the packaging shell facing away from the piezoelectric ceramic and connected to the piezoelectric ceramic through a wire;

[0013] Wherein, the ultrasonic transducer directly performs acoustic coupling through air and is used to emit ultrasonic waves in a direction perpendicular to the face of the user of the mask-type ultrasonic penetration enhancement device under the excitation of an electrical signal.

[0014] According to the air-coupled ultrasonic transducer provided by the present utility model, the inner surface of the bushing is provided with a stepped structure, and the height of the stepped structure is the sum of the thicknesses of the piezoelectric ceramic and the matching layer.

[0015] According to the air-coupled ultrasonic transducer provided by the present utility model, the thickness of the piezoelectric ceramic is half of the wavelength corresponding to the resonance frequency of the selected piezoelectric ceramic material, and the thickness of the matching layer is one-fourth of the wavelength corresponding to the resonance frequency of the selected matching layer material.

[0016] According to the air-coupled ultrasonic transducer provided by the present utility model, the resonance frequency of the ultrasonic transducer is 1 MHz - 5 MHz, and the thickness of the piezoelectric ceramic is between 0.4 mm and 2 mm.

[0017] According to the air-coupled ultrasonic transducer provided by the present utility model, the diameter of the piezoelectric ceramic is 15 mm - 30 mm.

[0018] According to the air-coupled ultrasonic transducer provided by the present utility model, the height of the bushing is equal to the depth of the packaging shell.

[0019] According to the air-coupled ultrasonic transducer provided by the present utility model, a cavity is formed between the piezoelectric ceramic and the packaging shell.

[0020] According to the air-coupled ultrasonic transducer provided by the present utility model, the packaging shell is provided with a through hole corresponding to the connector, and the orthographic projection of the connector on the packaging shell covers the through hole.

[0021] The present utility model further provides a mask-type ultrasonic permeation promoting device, which includes a mask-type outer shell and the air-coupled ultrasonic transducer described in any one of the above, and the air-coupled ultrasonic transducer is embedded in the mask-type outer shell.

[0022] According to the mask-type ultrasonic permeation promoting device provided by the present utility model, a flange is provided on the outer wall of the encapsulation shell of the air-coupled ultrasonic transducer, a clamping groove is provided on the mask-type outer shell, and the air-coupled ultrasonic transducer is mounted on the mask-type outer shell through the flange.

[0023] The above technical solution of the present utility model has the following beneficial effects:

[0024] For the air-coupled ultrasonic transducer and the mask-type ultrasonic permeation promoting device provided by the present utility model, the air-coupled ultrasonic transducer is applied to the mask-type ultrasonic permeation promoting device. The air-coupled ultrasonic transducer includes an encapsulation shell, a bushing, a piezoelectric ceramic, a matching layer and a connector. By arranging the bushing in the encapsulation shell, the piezoelectric ceramic and the matching layer are arranged in the bushing, the matching layer is located on the piezoelectric ceramic, the connector is arranged on the side of the encapsulation shell facing away from the piezoelectric ceramic, and the connector is connected to the piezoelectric ceramic through a wire. Among them, the ultrasonic transducer directly performs acoustic coupling through air and is used to emit ultrasonic waves in the direction perpendicular to the face of the user of the mask-type ultrasonic permeation promoting device under the excitation of an electrical signal, which can promote the percutaneous penetration and absorption of skin care products. Moreover, the air-coupled ultrasonic transducer performs acoustic coupling through air, without contacting the human face and without applying a coupling agent on the face, which not only reduces the complexity of ultrasonic permeation promotion and introduction, but also avoids the risks such as poor permeation promotion effect and skin damage caused by the poor fit of existing ultrasonic permeation promotion products, and improves the safety and permeation effect of ultrasonic promotion of drug percutaneous penetration. Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0026] Figure 1 It is a cross-sectional view of the air-coupled ultrasonic transducer provided by the embodiment of the present utility model;

[0027] Figure 2 It is an exploded view of the air-coupled ultrasonic transducer provided by the embodiment of the present utility model;

[0028] Figure 3 It is a front view of the mask-type ultrasonic permeation promoting device provided by the embodiment of the present utility model;

[0029] Figure 4 Side view of the mask - type ultrasonic permeation - promoting device provided by the embodiment of the present utility model;

[0030] Figure 5 Schematic cross - section view of the air - coupled ultrasonic transducer in the mask - type ultrasonic permeation - promoting device provided by the embodiment of the present utility model.

[0031] Reference numerals:

[0032] 10. Mask - type housing; 20. Air - coupled ultrasonic transducer; 21. Encapsulation housing; 22. Bushing; 23. Matching layer; 24. Piezoelectric ceramic; 25. Connector. Detailed implementation manners

[0033] To make the objectives, technical solutions and advantages of the present utility model clearer, the technical solutions in the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of them. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0034] Please refer to Figure 1 and Figure 2 , the present utility model provides an air - coupled ultrasonic transducer for use in a mask - type ultrasonic permeation - promoting device. The air - coupled ultrasonic transducer includes an encapsulation housing 21, a bushing 22, a matching layer 23, a piezoelectric ceramic 24, and a connector 25. The bushing 22 is disposed inside the encapsulation housing 21, and glue is applied on the outer peripheral surface of the bushing 22 for bonding and fixing the bushing 22 and the encapsulation housing 21. Both the matching layer 23 and the piezoelectric ceramic 24 are disposed in the bushing 22, and the four - peripheral edges of the piezoelectric ceramic 24 are in contact with the inner wall of the bushing 22. The matching layer 23 is located on the piezoelectric ceramic 24 and is bonded to the piezoelectric ceramic 24 by glue. The connector 25 is disposed on the side of the encapsulation housing 21 facing away from the piezoelectric ceramic 24 and is connected to the piezoelectric ceramic 24 through a wire (such as an enameled wire).

[0035] Among them, the ultrasonic transducer directly performs acoustic coupling through air and is used to emit ultrasonic waves in the direction perpendicular to the face of the user of the mask - type ultrasonic permeation - promoting device under the excitation of an electrical signal.

[0036] Specifically, the height of the bushing 22 is equal to the depth of the encapsulation housing 21, and the bushing 22 is embedded in the encapsulation housing 21. The inner surface of the bushing 22 is provided with a stepped structure that surrounds the inner wall of the bushing 22 for one week. The four - peripheral edges of the piezoelectric ceramic 24 are attached to the stepped structure of the bushing 22 for positioning. The matching layer 23 is disposed on the upper surface of the piezoelectric ceramic 24, and the four - peripheral edges of the matching layer 23 are in contact with the inner wall of the bushing 22.

[0037] Furthermore, the height of the step structure is the sum of the thicknesses of the piezoelectric ceramic 24 and the matching layer 23, which is convenient for better controlling the thicknesses of the piezoelectric ceramic 24 and the matching layer 23, facilitating assembly production control and subsequent grinding.

[0038] Among them, the encapsulation housing 21 preferably selects a metal material with a relatively light weight such as aluminum or a plastic material, thereby reducing the overall weight of the wearable mask-type ultrasonic permeation promotion device. Additionally, an extra ring structure is provided at the bottom edge of the encapsulation housing 21 as a mounting portion for facilitating installation on the wearable mask-type ultrasonic permeation promotion device.

[0039] To ensure the insulation between the piezoelectric ceramic 24 and the metal encapsulation housing 21 and to meet the lightweight requirement of the wearable mask-type ultrasonic permeation promotion device, preferably, the bushing 22 selects a plastic material and a step structure is designed on the inner surface of the bushing 22.

[0040] Furthermore, the thickness of the piezoelectric ceramic 24 is half of the wavelength corresponding to the resonance frequency of the selected piezoelectric ceramic material, and the thickness of the matching layer 23 is one-fourth of the wavelength corresponding to the resonance frequency of the selected matching layer material.

[0041] Among them, a cavity is formed between the piezoelectric ceramic 24 and the encapsulation housing 21, and this cavity serves as the air backing of the piezoelectric ceramic 24, enabling the ultrasonic transducer to perform acoustic coupling through air.

[0042] To ensure the overall lightweight and high portability of the wearable mask-type ultrasonic permeation promotion device, and considering the situation where the acoustic impedance mismatch between air and the piezoelectric ceramic 24 is severe, resulting in ultrasound being unable to radiate into the air, the matching layer 23 adopts lightweight materials such as microporous foamed polymers, silica aerogels, composite materials, etc., whose density is much smaller than that of the matching layer used in conventional water-immersed ultrasonic transducers.

[0043] The ultrasonic transducer of the present utility model adopts an air-coupled ultrasonic transducer, and the matching layer material selects a lightweight material, whose density is much smaller than that of the matching layer used in conventional water-immersed ultrasonic transducers, and can further reduce the weight of the ultrasonic transducer.

[0044] Meanwhile, considering the usage scenarios of the wearable mask-type ultrasonic permeation enhancement device, it is necessary to reduce the production cost of the entire product while also being able to take into account the permeation enhancement of smaller areas on the face. Preferably, the diameter of the piezoelectric ceramic 24 is 15 mm - 30 mm (such as 15 mm, 20 mm, 25 mm, or 30 mm), so that the ultrasonic waves can cover the entire face of the user, and the number of ultrasonic transducers can be reduced, thus ensuring the overall lightweight and high portability of the wearable mask-type ultrasonic permeation enhancement device, and also being able to take into account the introduction and permeation enhancement of small areas on the face. The material of the piezoelectric ceramic 24 is selected as lead zirconate titanate material (such as PZT-4), but it is not limited thereto, as long as it is a material with piezoelectric effect, such as piezoelectric single crystal, piezoelectric composite material, etc., to ensure that the air-coupled ultrasonic transducer can generate sufficient ultrasonic energy to meet the requirements of ultrasonic energy in the ultrasonic permeation enhancement scenario.

[0045] Furthermore, the resonant frequency of the ultrasonic transducer is 1 MHz - 5 MHz (such as 1 MHz, 2 MHz, 3 MHz, or 5 MHz). Therefore, the thickness of the piezoelectric ceramic is between 0.4 mm and 2 mm (such as 0.4 mm, 1 mm, 1.5 mm, or 2 mm), and an air backing is adopted, thereby further reducing the weight of the entire ultrasonic transducer and reducing the overall body thickness of the wearable mask-type ultrasonic permeation enhancement device.

[0046] The connector 25 can be a BNC (Bayonet-Neill–Concelman) radio frequency cable or a BNC connector to facilitate connection to an external drive circuit.

[0047] Among them, the encapsulation housing 21 is provided with a through hole at the position corresponding to the connector 25, and the orthographic projection of the connector 25 on the encapsulation housing 21 covers the through hole.

[0048] The air-coupled ultrasonic transducer provided by the present utility model for the mask-type ultrasonic permeation enhancement device realizes the miniaturization and lightweight of the ultrasonic transducer through the optimization of the frequency, size, housing material and structure, and encapsulation process of the air-coupled ultrasonic transducer, which can not only meet the requirements of the wearable mask-type ultrasonic permeation enhancement device for the lightweight, small size, and low cost of the used ultrasonic transducer, but also has a simple process and is easy to realize mass production, greatly improving the yield rate, reducing the cost, and increasing the market competitiveness of the product.

[0049] Please refer to Figures 3 - 5, the present utility model further provides a mask-type ultrasonic permeation promotion device, which includes a mask-type housing 10 and the air-coupled ultrasonic transducer 20 as described above. The air-coupled ultrasonic transducer 20 is embedded and fixed in the mask-type housing 10 according to actual needs and fixed with glue. Exemplarily, multiple air-coupled ultrasonic transducers 20 are respectively arranged at the forehead, cheeks and chin positions of the user's face. The specific quantity and positions can be set according to actual situations and are not limited herein. The mask-type housing 10 is used to be worn on the user's head, and the air-coupled ultrasonic transducer 20 faces the user's face. The air-coupled ultrasonic transducer 20 can emit ultrasonic waves in a direction perpendicular to the face under the excitation of an electrical signal to promote the percutaneous penetration and absorption of skin care products.

[0050] Among them, the air-coupled ultrasonic transducer 20 can be embedded in the side of the mask-type housing 10 close to the user's face. Alternatively, the air-coupled ultrasonic transducer 20 penetrates from one side surface of the mask-type housing 10 to the other side surface of the mask-type housing 10.

[0051] Furthermore, a flange is provided on the outer wall of the encapsulation housing 21 of the air-coupled ultrasonic transducer 20, and a corresponding card slot is provided on the mask-type housing 10. The air-coupled ultrasonic transducer 20 is installed on the mask-type housing 10 through the flange. Of course, other installation methods can also be adopted and are not limited herein.

[0052] The air-coupled ultrasonic transducer 20 can directly perform acoustic coupling through air, without contacting the human face and without applying a coupling agent on the face, which not only reduces the complexity of ultrasonic permeation promotion and introduction, but also avoids risks such as poor permeation promotion effect and skin damage caused by poor fitting of existing ultrasonic permeation promotion products, and improves the safety and permeation effect of ultrasonic promotion of drug percutaneous penetration.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. An air-coupled ultrasonic transducer for use in a mask-type ultrasonic osmosis device, characterized in that: include: Encapsulation shell; A bushing, disposed in the packaging shell; A piezoelectric ceramic is disposed in the bushing, and the edges of the piezoelectric ceramic are in contact with the inner wall of the bushing; A matching layer, disposed in the bushing and located on the piezoelectric ceramic; A connector, arranged on a side of the packaging shell facing away from the piezoelectric ceramic, and connected to the piezoelectric ceramic through a wire; The ultrasonic transducer is acoustically coupled directly through the air and is used to emit ultrasonic waves in a direction perpendicular to the face of the user of the mask-type ultrasonic permeation device under the excitation of an electrical signal.

2. The air-coupled ultrasonic transducer according to claim 1, characterized in that: The inner surface of the bushing is provided with a step structure, and the height of the step structure is the sum of the thickness of the piezoelectric ceramic and the matching layer.

3. The air-coupled ultrasonic transducer according to claim 2, characterized in that: The thickness of the piezoelectric ceramic is half the wavelength of the resonance frequency of the selected piezoelectric ceramic corresponding material, and the thickness of the matching layer is one quarter the wavelength of the resonance frequency of the selected matching layer corresponding material.

4. The air-coupled ultrasonic transducer according to claim 3, characterized in that: The resonant frequency of the ultrasonic transducer is 1 MHz-5 MHz, and the thickness of the piezoelectric ceramic is between 0.4 mm and 2 mm.

5. The air-coupled ultrasonic transducer according to claim 1, characterized in that: The diameter of the piezoelectric ceramic is 15 mm to 30 mm.

6. The air-coupled ultrasonic transducer according to claim 1, characterized in that: The height of the bushing is equal to the depth of the packaging housing.

7. The air-coupled ultrasonic transducer according to claim 1, characterized in that: A cavity is formed between the piezoelectric ceramic and the packaging shell.

8. The air-coupled ultrasonic transducer according to claim 1, characterized in that: A through hole is provided in the packaging shell at a position corresponding to the connector, and the orthographic projection of the connector on the packaging shell covers the through hole.

9. A mask-type ultrasonic osmosis device, characterized in that: It comprises a mask-type shell and an air-coupled ultrasonic transducer as described in any one of claims 1 to 8, wherein the air-coupled ultrasonic transducer is embedded in the mask-type shell.

10. The mask-type ultrasonic osmosis device according to claim 9, characterized in that: A flange is arranged on the outer wall of the packaging shell of the air-coupled ultrasonic transducer, a slot is arranged on the mask-type shell, and the air-coupled ultrasonic transducer is mounted on the mask-type shell through the flange.

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