Electronic acne paste

Through the combination of the phototherapy component of the electronic acne patch and the hydrocolloid layer, the problems of inflammation and ulceration during the healing of acne wounds are solved, and the rapid healing of wounds and the avoidance of acne scars and acne pits are achieved.

CN222942817UActive Publication Date: 2025-06-06SHENZHEN QIANYU TECH CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202420678208.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-04-02
Publication Date
2025-06-06
Estimated Expiration
2034-04-02

AI Technical Summary

Technical Problem

Acne wounds are prone to inflammation and ulceration during the healing process, and may not be completely repaired in the later stage, resulting in acne scars and acne pits.

Method used

Use electronic acne patches, which include shell, phototherapy components and hydrocolloid layer. The phototherapy assembly includes LED lamps of multiple wavelengths, which are irradiated onto the acne through the light-transmitting holes, and combined with the hydrocolloid layer to absorb the leachate to form a gel-like dressing, providing a wet environment to promote healing.

Benefits of technology

Through the dual effects of phototherapy and hydrocolloid layer, it can effectively promote the healing of acne wounds and reduce the risk of acne marks and acne pits.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN222942817U_ABST
    Figure CN222942817U_ABST
Patent Text Reader

Abstract

The embodiment of the utility model belongs to personal care products, and relates to an electronic acne patch which comprises a shell and a phototherapy assembly. One end of the shell is provided with a skin attaching end; the skin-attaching end is provided with an inwards-concave cavity and a light-transmitting hole located in the bottom of the cavity. The phototherapy assembly comprises a circuit board and a phototherapy lamp set arranged on the circuit board. The circuit board is located on the rear side of the skin attaching end, and the phototherapy lamp set is located in the light hole. A hydrocolloid layer is further arranged on the surface of the skin attaching end. According to the invention, a hydrocolloid and phototherapy LED combined mode is adopted to repair wounds generated by acnes, so that acne marks and acne pits are avoided.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present application relates to personal care products, and more specifically, to an electronic acne patch. Background Art

[0002] Acne, as a common and unavoidable skin problem, has been bothering many beauty-conscious people. Many people want to squeeze out pimples on their faces, but are very worried about leaving acne marks and acne pits. The main reason is that after squeezing out pimples, the wounds may become inflamed, ulcerated, and even unable to be completely repaired later.

[0003] At present, there are a series of acne patch products on the market, which use the method of bonding hydrocolloids on release paper or release film. After the hydrocolloid absorbs the exudate of acne, the hydrophilic particles in the dressing can form a semi-solid substance similar to gel, which adheres to the base of the wound, provides and maintains a moist environment conducive to wound healing. The treatment form is relatively simple. In the process of wound healing, the problem of skin repair also needs to be faced. Utility Model Content

[0004] The embodiment of the present application provides an electronic acne patch that solves the technical problem of acne wound healing.

[0005] In order to solve the above technical problems, the present application embodiment provides an electronic acne patch, which adopts the following technical solution:

[0006] An electronic acne patch comprises: a shell, a phototherapy component; a skin-contacting end is provided at one end of the shell; the skin-contacting end is provided with a concave cavity and a light-transmitting hole at the bottom of the cavity; the light-therapy component comprises a circuit board and a phototherapy lamp group arranged on the circuit board; the circuit board is located at the rear side of the skin-contacting end, and the phototherapy lamp group is located in the light-transmitting hole; a hydrocolloid layer is also provided on the surface of the skin-contacting end.

[0007] Furthermore, the phototherapy lamp group includes one or more of a blue light LED lamp with a wavelength of 460±20nm, a red light LED lamp with a wavelength of 630nm±20nm, a red light LED lamp with a wavelength of 660±20nm, and an infrared light LED lamp with a wavelength of 850nm±20nm.

[0008] Furthermore, the phototherapy lamp group includes one or more of a blue light LLLT lamp with a wavelength of 460±20nm, a red light LLLT lamp with a wavelength of 630nm±20nm, a red light LLLT lamp with a wavelength of 660±20nm, and an infrared light LLLT lamp with a wavelength of 850nm±20nm.

[0009] Furthermore, the hydrocolloid layer includes hydrocolloid, salicylic acid, calendula, and Centella asiatica; the proportion of the hydrocolloid is 90%-96%.

[0010] Furthermore, the hydrocolloid layer includes hydrocolloid, niacinamide, tea tree oil, and Centella asiatica; the proportion of the hydrocolloid is 90%-96%.

[0011] Furthermore, the shell includes an outer shell, and a skin-contacting piece fixed to one end of the outer shell; the skin-contacting piece is provided with the skin-contacting end, and the material of the skin-contacting piece is silicone.

[0012] Furthermore, the shell is provided with an inner cavity; the phototherapy component also includes a power supply component; the circuit board and the power supply component are installed in the inner cavity; the power supply component includes a conductive member and a button battery; a negative / positive contact is provided on the side of the circuit board close to the button battery; the conductive member is provided with an elastic end and a conductive end extending to one side of the button battery; the conductive end is electrically connected to the circuit board; the elastic end of the conductive member stops and is electrically connected to the positive / negative electrode of the button battery.

[0013] Furthermore, the phototherapy component also includes a power supply component; the power supply component is a button battery; the circuit board is a flexible circuit board, which is provided with a connection end that bypasses the button battery; a negative / positive contact is provided on the side of the circuit board close to the button battery; the connection end is electrically connected to an elastic member; one end of the elastic member stops at the shell, and the other end stops at and is electrically connected to the positive / negative electrode of the button battery.

[0014] Furthermore, the acne patch also includes an insulating sheet; the shell is provided with a slot for passing the insulating sheet; the insulating sheet is arranged between the button battery and the negative / positive contacts of the circuit board; after the insulating sheet is pulled out of the slot, the circuit of the button battery, the conductive part, and the circuit board is connected.

[0015] Furthermore, the acne patch also includes a base film adhered to the outer side of the hydrocolloid layer.

[0016] Furthermore, the shell is a cylinder with a diameter of 10-16 mm and a height of 3.5 mm-5 mm.

[0017] The present invention also discloses an electronic acne patch, comprising: a shell, a phototherapy component; a skin-sticking piece is provided at one end of the shell; the skin-sticking piece is a light-transmitting piece, which is provided with a concave cavity; the phototherapy component includes a circuit board; the circuit board is located at the rear side of the skin-sticking piece, and the circuit board is provided with a phototherapy lamp group; the light of the phototherapy lamp group passes through the skin-sticking piece and is emitted to the outside; a hydrocolloid layer is also provided on the surface of the skin-sticking piece.

[0018] The present invention also discloses an electronic acne patch, comprising: a main body, a hydrocolloid patch; the main body comprises: a shell, a phototherapy component; a skin-attaching piece is provided at one end of the shell; the skin-attaching piece is provided with a concave cavity, and a light-transmitting hole located at the bottom of the cavity; the phototherapy component comprises a circuit board; the circuit board is located at the rear side of the skin-attaching piece, and the circuit board is provided with a phototherapy lamp group located at the light-transmitting hole; the skin-attaching piece is also provided with an adhesive layer located on the surface of the cavity and used for bonding the hydrocolloid layer; the hydrocolloid patch comprises a hydrocolloid layer, and membranes respectively bonded to both sides of the hydrocolloid layer.

[0019] Compared with the prior art, the embodiments of the present application have the following beneficial effects:

[0020] An electrode provided in an embodiment of the present application has a conductive base and an electrode head electrically connected via an elastic conductor, a connector is injection molded on the periphery of the elastic conductor, and the connector is an elastomer. Therefore, when the electrode acts on human skin, the connector and the elastic conductor can bend according to the surface contours of different shapes.

[0021] An electronic acne patch provided in an embodiment of the present application uses a cavity to accommodate acne. The surface of the cavity is bonded with a hydrocolloid layer, which can be attached to and adhered to the skin. After the hydrocolloid absorbs the exudate of the acne, the hydrophilic particles in the dressing can form a semi-solid substance similar to a gel, which adheres to the base of the wound, provides and maintains a moist environment that is conducive to wound healing; the light emitted by the phototherapy component is irradiated onto the acne through the light-transmitting hole at the bottom of the cavity, which is conducive to the rapid formation of a moist environment by the hydrocolloid. The two can also be combined to promote wound healing and avoid leaving acne marks and acne pits.

[0022] Furthermore, an insulating sheet is arranged between the button battery and the negative / positive contacts of the circuit board. When in use, the circuit of the button battery, the conductive part and the circuit board can be connected by simply pulling out the insulating sheet, thereby serving as a control switch of the phototherapy lamp group, and the operation is simple. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the scheme of the present application, a brief introduction is given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a three-dimensional view of the first embodiment of the electronic acne patch of the present application;

[0025] Figure 2 This is an exploded view of the first embodiment of the electronic acne patch of the present application;

[0026] Figure 3 is a cross-sectional view of the first embodiment of the electronic acne patch of the present application;

[0027] Figure 4 This is an exploded view of the second embodiment of the electronic acne patch of the present application;

[0028] Figure 5 is a cross-sectional view of the second embodiment of the electronic acne patch of the present application;

[0029] Figure 6 This is a three-dimensional view of the third embodiment of the electronic acne patch of the present application;

[0030] Figure 7 This is a three-dimensional view of the fourth embodiment of the electronic acne patch of the present application.

[0031] Reference numerals:

[0032] 100-main body, 1-shell, 11-shell, 12-skin-adhering part, 121-skin-adhering end, 1211-cavity, 1212-light-transmitting hole, 13-inner cavity, 14-groove, 15-slot, 16-rear cover, 2-phototherapy component, 21-circuit board, 211-connecting end, 212-elastic part, 22-phototherapy lamp group, 23-power supply component, 231-conductive part, 2311-elastic end, 2312-conductive end, 232-button battery, 3-hydrocolloid patch, 31-hydrocolloid layer, 32-diaphragm, 4-insulating sheet, 5-decorative plate DETAILED DESCRIPTION

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0034] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] Embodiment 1

[0036] like Figure 1As shown, an electronic acne patch includes: a shell 1, a phototherapy component 2. One end of the shell 1 is provided with a skin-attaching end 121, and the skin-attaching end 121 is provided with a concave cavity 1211, and a light-transmitting hole 1212 located at the bottom of the cavity 1211. The surface of the skin-attaching end 121 is also provided with a hydrocolloid layer (not shown in the figure). The cavity 1211 is used to accommodate acne, and the hydrocolloid layer is bonded to the skin-attaching end 121. The hydrocolloid layer includes hydrocolloid, salicylic acid, calendula, and Centella asiatica, and the proportion of hydrocolloid is 90%-96%. Alternatively, the hydrocolloid layer includes hydrocolloid, niacinamide, tea tree oil, and Centella asiatica, and the proportion of hydrocolloid is 90%-96%.

[0037] like Figure 2 , Figure 3 As shown, the housing 1 comprises a shell 11, and a skin-contacting member 12 fixed to one end of the shell 11, and the skin-contacting member 12 is provided with a skin-contacting end 121. Preferably, the shell 11 is made of plastic material, and the skin-contacting member 12 is made of silicone.

[0038] The phototherapy component 2 includes a circuit board 21 and a phototherapy lamp group 22 disposed on the circuit board 21. The circuit board 21 is a PCB board that is snapped into the housing 11 and is located at the rear side of the skin-attaching end 121. The phototherapy lamp group 22 is located in the light-transmitting hole 1212. The phototherapy lamp group includes one or more of a blue light LED lamp with a wavelength of 460±20nm, a red light LED lamp with a wavelength of 630nm±20nm, a red light LED lamp with a wavelength of 660±20nm, and an infrared light LED lamp with a wavelength of 850nm±20nm. In this embodiment, the four LED lamps of the electronic acne patch can form one or more electronic acne patches individually or in combination, and the individual or combined methods are selected according to actual needs, for example: a combination of a blue light LED lamp with a wavelength of 460±20nm, a red light LED lamp with a wavelength of 630nm±20nm, a red light LED lamp with a wavelength of 660±20nm, and an infrared light LED lamp with a wavelength of 850nm±20nm.

[0039] The phototherapy component 2 also includes a power supply component 23, and the power supply component 23 includes a conductive member 231 and a button battery 232. The housing 1 is provided with an inner cavity 13, and the circuit board 21 and the power supply component 23 are installed in the inner cavity 13. The circuit board 21 is provided with a negative contact (not shown in the figure) on the side close to the button battery, and the conductive member 231 is provided with an elastic end 2311 and a conductive end 2312 extending to one side of the button battery. The conductive end 2312 is electrically connected to the circuit board 21, and the elastic end 2311 of the conductive member 231 is stopped and electrically connected to the positive electrode of the button battery 232. The housing 11 is also provided with a groove 14 for accommodating the deformation space of the elastic end 2311.

[0040] The acne patch also includes an insulating sheet 4. The housing 1 is provided with a slot 15 for passing the insulating sheet 4. The insulating sheet 4 is provided between the button battery and the negative contact of the circuit board 21. After the insulating sheet 4 is pulled out of the slot 15, under the elastic force of the elastic end 2311 on the button battery 232, the negative electrode of the button battery 232 directly contacts the negative contact of the circuit board 21 and forms an electrical connection, thereby making the circuit of the button battery 232, the conductive member 231, and the circuit board 21 conductive. Preferably, the insulating sheet 4 is made of PVC.

[0041] Preferably, the shell 1 is a cylinder with a diameter of 10-16 mm and a height of 3.5 mm-5 mm. The overall size is small. A decorative plate 5 is also bonded to the top of the shell 1. The decorative plate 5 is made of glue dripping or patch technology.

[0042] Preferably, the acne patch further comprises a base film (not shown in the figure) bonded to the outside of the hydrocolloid layer. Before use, the base film is used to prevent the hydrocolloid layer from being contaminated.

[0043] In other embodiments, the phototherapy lamp group includes one or more of a blue light LLLT lamp with a wavelength of 460±20nm, a red light LLLT lamp with a wavelength of 630nm±20nm, a red light LLLT lamp with a wavelength of 660±20nm, and an infrared light LLLT lamp with a wavelength of 850nm±20nm. The irradiation angle of the LLLT lamp is 15°±5°. One or more electronic acne patches can be formed individually or in combination, and the individual or combined methods are selected according to actual needs.

[0044] In other embodiments, a positive electrode contact is disposed on one side of the circuit board close to the button battery, and the elastic end of the conductive member abuts against and is electrically connected to the negative electrode of the button battery.

[0045] An electronic acne patch according to an embodiment of the present application is used by first tearing off the base film on the acne patch and sticking the acne patch on the acne. Since the shell 1 is provided with a concave cavity 1211 for accommodating the acne, the shell 1 will not come into direct contact with the acne, thereby avoiding squeezing of the acne. At the same time, the hydrocolloid layer on the surface of the cavity 1211 can fit and adhere to the skin. During use, after the hydrocolloid absorbs the exudate of the acne, the hydrophilic particles in the dressing can form a semi-solid substance similar to a gel, which adheres to the base of the wound, providing and maintaining a moist environment that is conducive to wound healing; and the light emitted by the phototherapy component 2 is irradiated onto the acne through the light-transmitting hole 1212 at the bottom of the cavity 1211, which is conducive to the rapid formation of a moist environment by the hydrocolloid. The two can be combined to promote wound healing.

[0046] Embodiment 2

[0047] like Figure 4 , Figure 5As shown, the present application also discloses a second embodiment of an electronic acne patch. The difference between the second embodiment and the first embodiment is that: the housing 1 includes a shell 11 and a rear cover 16, the phototherapy component 2 includes a circuit board 21 and a power supply component 23, and the power supply component 23 is a button battery 232, wherein the circuit board 21 is a flexible circuit board, which is provided with a connection end 211 that bypasses the button battery 232 to form a semi-encapsulation or full encapsulation of the button battery. A negative contact is provided on one side of the circuit board 21 close to the button battery 232, and the connection end 211 is electrically connected to an elastic member 212, which is fixedly connected to the connection end 211 by welding. One end of the elastic member 212 stops at the housing 1, and the other end stops and is electrically connected to the positive electrode of the button battery. Preferably, the back glue of the circuit board 21 is bonded to the housing 11, the back glue of the connection end 211 is bonded to the rear cover 16, and the elastic member 212 is a metal spring.

[0048] In a specific implementation, a positive electrode contact (not shown) is disposed on one side of the circuit board 21 close to the button battery 232 , and the elastic end 2311 of the conductive member 231 abuts against and is electrically connected to the negative electrode of the button battery 232 .

[0049] Embodiment 3

[0050] like Figure 6 As shown, the present application also discloses a third embodiment of an electronic acne patch, which includes: a shell 1 and a phototherapy component 2. A skin-attaching member 12 is provided at one end of the shell 1. The skin-attaching member 12 is a light-transmitting member, which is provided with a concave cavity 1211. The phototherapy component 2 includes a circuit board 21, which is located at the rear side of the skin-attaching member 12. The circuit board 21 is provided with a phototherapy lamp group 22. The light of the phototherapy lamp group 22 passes through the skin-attaching member 12 and is emitted to the outside. A hydrocolloid layer 31 is also provided on the surface of the skin-attaching member 12.

[0051] The difference between Example 3 and Example 1 and Example 2 is that the skin-contacting part 12 is a light-transmitting part, and the circuit board 21 and the phototherapy lamp group 22 are located on the rear side of the skin-contacting part 12, wherein the circuit board 21 can adopt the PCB board structure and electrical connection method of Example 1, and can adopt the flexible circuit board structure and electrical connection method of Example 2.

[0052] Embodiment 4

[0053] like Figure 7As shown, the present application also discloses a fourth embodiment of an electronic acne patch, which includes: a main body 100 and a hydrocolloid patch 3. The main body 100 includes: a shell 1 and a phototherapy component. A skin-attaching piece 12 is provided at one end of the shell 1, and the skin-attaching piece 12 is provided with a concave cavity 1211 and a light-transmitting hole 1212 located at the bottom of the cavity 1211. The phototherapy component 2 includes a circuit board, which is located on the rear side of the skin-attaching piece 12, and the circuit board is provided with a phototherapy lamp group 22 located in the light-transmitting hole. The skin-attaching piece 12 is also provided with an adhesive layer located on the surface of the cavity 1211 and used to bond the hydrocolloid layer 31. The hydrocolloid patch 3 includes a hydrocolloid layer 31 and a membrane 32 respectively bonded to both sides of the hydrocolloid layer 31.

[0054] In other embodiments, the body of the electronic acne patch may also be a combination of a hydrocolloid patch. Specifically, the body of the electronic acne patch may be the structure of the second or third embodiment without the hydrocolloid layer, and the circuit board may be a PCB board or a flexible circuit board.

[0055] Obviously, the embodiments described above are only some embodiments of the present application, rather than all embodiments. The preferred embodiments of the present application are given in the accompanying drawings, but they do not limit the patent scope of the present application. The present application can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. Although the present application is described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific implementation methods, or to perform equivalent replacement of some of the technical features therein. Any equivalent structure made using the contents of the present application specification and the accompanying drawings, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present application.

Claims

1. An electronic acne patch, characterized in that: include: A shell, a phototherapy component; one end of the shell is provided with a skin-contacting end; the skin-contacting end is provided with a concave cavity and a light-transmitting hole at the bottom of the cavity; the phototherapy component includes a circuit board, and a phototherapy lamp group arranged on the circuit board; the circuit board is located at the rear side of the skin-contacting end, and the phototherapy lamp group is located in the light-transmitting hole; a hydrocolloid layer is also provided on the surface of the skin-contacting end.

2. The electronic acne patch according to claim 1, characterized in that: The phototherapy lamp group includes one or more of a blue light LED lamp with a wavelength of 460±20nm, a red light LED lamp with a wavelength of 630nm±20nm, a red light LED lamp with a wavelength of 660±20nm, and an infrared light LED lamp with a wavelength of 850nm±20nm.

3. The electronic acne patch according to claim 1, characterized in that: The phototherapy lamp group includes one or more of a blue light LLLT lamp with a wavelength of 460±20nm, a red light LLLT lamp with a wavelength of 630nm±20nm, a red light LLLT lamp with a wavelength of 660±20nm, and an infrared light LLLT lamp with a wavelength of 850nm±20nm.

4. The electronic acne patch according to claim 1, characterized in that: The shell comprises an outer shell and a skin-contacting piece fixed to one end of the outer shell; the skin-contacting piece is provided with the skin-contacting end, and the material of the skin-contacting piece is silicone.

5. The electronic acne patch according to claim 1, characterized in that: The shell is provided with an inner cavity; the phototherapy component also includes a power supply component; the circuit board and the power supply component are installed in the inner cavity; the power supply component includes a conductive member and a button battery; a negative / positive contact is provided on the side of the circuit board close to the button battery; the conductive member is provided with an elastic end and a conductive end extending to one side of the button battery; the conductive end is electrically connected to the circuit board; the elastic end of the conductive member stops and is electrically connected to the positive / negative electrode of the button battery.

6. The electronic acne patch according to claim 1, characterized in that: The phototherapy component also includes a power supply component; the power supply component is a button battery; the circuit board is a flexible circuit board, which is provided with a connection end that bypasses the button battery; a negative / positive contact is provided on the side of the circuit board close to the button battery; the connection end is electrically connected to an elastic member; one end of the elastic member stops at the shell, and the other end stops at and is electrically connected to the positive / negative electrode of the button battery.

7. The electronic acne patch according to claim 5 or 6, characterized in that: The acne patch also includes an insulating sheet; the shell is provided with a slot for passing the insulating sheet; the insulating sheet is arranged between the button battery and the negative / positive contacts of the circuit board; after the insulating sheet is pulled out of the slot, the circuit of the button battery, the conductive part, and the circuit board is connected.

8. The electronic acne patch according to claim 1, characterized in that: The acne patch also includes a base film bonded to the outer side of the hydrocolloid layer.

9. The electronic acne patch according to claim 1, characterized in that: The shell is a cylinder with a diameter of 10-16 mm and a height of 3.5 mm-5 mm.

10. An electronic acne patch, characterized in that: include: A shell, a phototherapy component; a skin-contacting piece is provided at one end of the shell; the skin-contacting piece is a light-transmitting piece, which is provided with a concave cavity; the phototherapy component includes a circuit board; the circuit board is located at the rear side of the skin-contacting piece, and the circuit board is provided with a phototherapy lamp group; the light of the phototherapy lamp group passes through the skin-contacting piece and is emitted to the outside; a hydrocolloid layer is also provided on the surface of the skin-contacting piece.

11. An electronic acne patch, characterized in that: It comprises: a main body and a hydrocolloid patch; the main body comprises: a shell and a phototherapy component; a skin-fitting piece is provided at one end of the shell; the skin-fitting piece is provided with a concave cavity and a light-transmitting hole at the bottom of the cavity; the phototherapy component comprises a circuit board; the circuit board is located at the rear side of the skin-fitting piece, and the circuit board is provided with a phototherapy lamp group located at the light-transmitting hole; the skin-fitting piece is also provided with an adhesive layer located on the surface of the cavity and used for bonding the hydrocolloid layer; the hydrocolloid patch comprises a hydrocolloid layer and membranes respectively bonded to both sides of the hydrocolloid layer.