Dry negative-pressure adhesive patch

Abstract

The present invention provides a dry negative-pressure adhesive patch. The dry negative-pressure adhesive patch comprises: a patch having a flat surface; and a plurality of protruding negative-pressure chambers on the patch, wherein each of the protruding negative-pressure chambers includes an elastic side wall extending from the surface of the patch, and the elastic side wall has a horizontal cross section which is parallel to the surface of the patch and the shape of which is a ring, and the diameter of the elastic side wall, from the entrance to bottom, gradually increases and then decreases.

Description

Dry negative pressure adhesive patch

[0001] The present invention relates to a dry negative pressure adhesive patch, and more particularly, to a dry negative pressure adhesive patch that forms a strong negative pressure to provide strong adhesive force.

[0002] Recently, interest in patch products that attach to the skin, such as mask packs and skin condition measurement sensor patches, has been increasing.

[0003] Accordingly, research on the development and improvement of skin patches is steadily increasing, and there is a high demand for improvement in chronic problems of mask packs, such as problems in which the mask does not adhere well to the skin due to moisture or oil, problems in which it does not adhere well to the curves of the face, and problems in which the ampoule liquid remains and flows.

[0004] In addition, there is an increasing demand for dry adhesion that does not require chemical adhesives as a patch attached to the skin, and in particular, there is an increasing demand for dry adhesion in a wet state such as skin.

[0005] Conventional medical tapes use chemical adhesives, such as acrylic compounds, to create adhesive strength. However, these chemical adhesives not only severely tear and damage the delicate epidermis of babies and the elderly, but also have the problem that the adhesive strength becomes very weak once the bandage is removed.

[0006] To address this issue, active research is underway on dry bonding systems that do not use chemical adhesives. Dry bonding systems adhere without chemical adhesives, relying on adhesive forces such as negative pressure or van der Waals forces. They offer the advantages of minimal surface damage during attachment and detachment, excellent repeatability, and reusability.

[0007] As a prior art document, there is (patent document 1) registered patent No. 10-1477631.

[0008] The problem to be solved by the present invention is to provide a dry negative pressure adhesive patch that can form a strong negative pressure by providing a large volume change of a plurality of positive negative pressure chambers and can configure a large number of negative pressure chambers per unit area of ​​a sheet.

[0009] According to one embodiment of the present invention, a dry negative pressure adhesive patch comprises: a patch having a flat surface; a dry negative pressure adhesive patch comprising a plurality of positive negative pressure chambers on the patch, wherein the positive negative pressure chambers include elastic side walls extending from the patch surface, and the elastic side walls have a horizontal cross-sectional shape parallel to the patch surface, such as a circular ring shape, an elliptical ring shape, or a polygonal ring shape, and are formed such that the diameter of the circle from the entrance to the bottom, the distance between the major axis or minor axis of the ellipse, or the length of one side of the polygon gradually increases and then decreases.

[0010] The diameter of the above circle, the distance between the major or minor axes of the ellipse, or the length of one side of the polygon may be from 200 micrometers to 10 millimeters.

[0011] The height of the above elastic side wall may be from 200 micrometers to 10 millimeters in length.

[0012] In one embodiment, the elastic side wall may have a curvature that can be restored after being contracted to become more convex when pressure is applied in a vertical direction while the inlet is in close contact with the bonding surface.

[0013] In one embodiment, the positive pressure chamber may include an annular pad portion extending radially from an edge of its inlet.

[0014] The above-mentioned annular pad portion is characterized by expanding in a direction increasing from the patch surface when extended from the edge of the inlet. This allows for more secure attachment to a round attachment surface such as a face and allows for better maintenance of negative pressure.

[0015] The distance from the inner circle to the outer circle of the above-mentioned annular pad portion may be 50 micrometers to 1 millimeter.

[0016] According to another embodiment of the present invention, a dry negative pressure adhesive patch comprises: a patch having a flat surface; and a plurality of positive negative pressure chambers on the patch, wherein the positive negative pressure chambers include elastic side walls extending from the patch surface, and the elastic side walls are characterized in that they have a horizontal cross-sectional shape parallel to the patch surface that is annular and are formed such that their diameter gradually decreases and then increases from the entrance to the bottom.

[0017] In one embodiment, the elastic side wall may have a curvature that can be restored after being contracted to become more concave when pressure is applied in a vertical direction while the inlet is in close contact with the bonding surface.

[0018] In one embodiment, the positive pressure chamber may include an annular pad portion extending radially from an edge of its inlet.

[0019] According to another embodiment of the present invention, a dry negative pressure adhesive patch comprises: a patch having a flat surface; and a plurality of positive negative pressure chambers on the patch, wherein the plurality of positive negative pressure chambers are characterized in that a first positive negative pressure chamber having an annular horizontal cross-sectional shape parallel to the patch surface and an elastic side wall extending from the patch surface such that the diameter gradually increases from an inlet to a bottom and then decreases; and a second positive negative pressure chamber having an annular horizontal cross-sectional shape parallel to the patch surface and an elastic side wall extending from the patch surface such that the diameter gradually decreases from an inlet to a bottom and then increases, the first positive negative pressure chamber being alternately arranged adjacent to each other.

[0020] In one embodiment, the elastic side wall of the first positive pressure chamber may have a curvature that is recoverable after being contracted and deformed to become more convex when pressure is applied in a vertical direction while the inlet thereof is in close contact with the bonding surface, and the elastic side wall of the second positive pressure chamber may have a curvature that is recoverable after being contracted and deformed to become more concave when pressure is applied in a vertical direction while the inlet thereof is in close contact with the bonding surface.

[0021] In one embodiment, the first positive pressure chamber and the second positive pressure chamber may include an annular pad portion extending radially from an edge of the inlet thereof.

[0022] The negative pressure chamber of the present invention includes a protrusion having a shape similar to a sphere or a slightly larger sphere than a hemisphere protruding from its base surface. This protrusion can provide much stronger adhesion in a wet environment than an adhesive method having a shape without a protrusion. The height of this protrusion is smaller than the depth of the negative pressure chamber (the height of the elastic side wall), and the longest horizontal length of the horizontal plane of this protrusion is shorter than the horizontal length inside the negative pressure chamber before attachment to the skin surface, so that it does not touch the elastic side wall of the negative pressure chamber, but when applied to the skin surface, the elastic side wall is deformed and the protrusion is deformed, and by this contact (contact), a moisture absorption space is formed between the base surface and the elastic side wall, and moisture when applied to the wet skin surface moves to this moisture absorption space, thereby providing strong adhesion in a wet skin environment.

[0023] According to the dry negative pressure adhesive patch of the present invention, strong adhesive force can be provided by forming a strong negative pressure according to the large volume change of a plurality of positive negative pressure chambers, and strong adhesive force can be provided even under high humidity such as in a sweaty state, and the negative pressure can be applied more locally and intensively, so that the adhesive efficiency can be increased.

[0024] FIG. 1 is a perspective view showing the appearance of a dry negative pressure adhesive patch according to a first embodiment of the present invention.

[0025] Figure 2 is a cross-sectional view of Figure 1.

[0026] Fig. 3 is a cross-sectional view showing the appearance of the positive pressure chamber illustrated in Fig. 1 in a contracted and deformed state.

[0027] FIG. 4 is a drawing showing another embodiment of the annular pad portion of the dry negative pressure adhesive patch according to the first embodiment of the present invention.

[0028] FIG. 5 is a drawing comparing the arrangement of a plurality of positive negative pressure chambers of a dry negative pressure adhesive patch according to the first embodiment of the present invention and, as a comparative example, the arrangement of a cylindrical positive negative pressure chamber having an annular pad portion at the entrance.

[0029] FIG. 6 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a second embodiment of the present invention.

[0030] FIG. 7 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a third embodiment of the present invention.

[0031] FIG. 8 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a fourth embodiment of the present invention.

[0032] FIG. 9 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a fifth embodiment of the present invention.

[0033] Fig. 10 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to the sixth embodiment of the present invention.

[0034] Hereinafter, a dry negative pressure adhesive patch according to an embodiment of the present invention will be described in detail with reference to the attached drawings. The present invention can be modified in various ways and can take various forms, and specific embodiments are illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, but it should be understood that the present invention includes all modifications, equivalents, and substitutes included in the spirit and technical scope of the present invention. In describing each drawing, similar reference numerals are used to indicate similar components. In the attached drawings, the dimensions of structures are shown larger than actual size to ensure clarity of the present invention.

[0035] While terms like "first" and "second" may be used to describe various components, these components should not be limited by these terms. These terms are used solely to distinguish one component from another. For example, without departing from the scope of the present invention, a first component could be referred to as a "second component," and similarly, a second component could also be referred to as a "first component."

[0036] The terminology used in this application is only used to describe specific embodiments and is not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly indicates otherwise. In this application, it should be understood that the terms "comprise" or "have" indicate the presence of a feature, number, step, operation, component, part, or combination thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

[0037] Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and will not be interpreted in an idealized or overly formal sense unless explicitly defined herein.

[0038] Example 1

[0039] FIG. 1 is a perspective view showing the appearance of a dry negative pressure adhesive patch according to a first embodiment of the present invention, FIG. 2 is a cross-sectional view of FIG. 1, FIG. 3 is a cross-sectional view showing the appearance of the positive negative pressure chamber shown in FIG. 1 in a contracted and deformed state, and FIG. 4 is a drawing showing another embodiment of the annular pad portion of the dry negative pressure adhesive patch according to the first embodiment of the present invention.

[0040] Referring to FIGS. 1 and 2, a dry negative pressure adhesive patch according to one embodiment of the present invention includes a patch (110) having a flat surface; and a plurality of positive negative pressure chambers (120) on the patch (110). The patch (110) and the plurality of positive negative pressure chambers (120) are formed of a flexible material.

[0041] The patch (110) may be a substrate having a flat surface that is flexible and breathable.

[0042] The positive pressure chamber (120) may be nano-sized or micro-sized and includes an elastic side wall (121) extending from the face of the patch (110).

[0043] The elastic side wall (121) has a horizontal cross-sectional shape parallel to the surface of the patch (110) that is ring-shaped, and is formed such that the diameter gradually increases and then decreases from the inlet to the bottom. Accordingly, the elastic side wall (121) can be formed in a jar shape. In addition, the elastic side wall (121) can form a jar-shaped cavity inside according to the jar shape, so that the volume of the positive negative pressure chamber (120) can increase. The cavity can prevent air from leaking when the inlet of the elastic side wall (121) is attached to the adherend surface, so that a negative pressure can be formed according to the difference between the pressure inside the elastic side wall (121) and the pressure outside the elastic side wall (121).

[0044] Meanwhile, the elastic side wall (121) can have a curvature that can be restored after being deformed to become more convex when pressure is applied in a vertical direction while the inlet is in close contact with the surface to be bonded.

[0045] The positive negative pressure chamber (120) can be restored after being deformed to become more convex as the elastic side wall (121) contracts, as shown in Fig. 3. At this time, the volume change of the positive negative pressure chamber (120) due to the contraction and deformation of the elastic side wall (121) can increase depending on the jar shape of the elastic side wall (121).

[0046] That is, the jar shape is a shape in which the diameter gradually increases and then decreases from the entrance to the bottom of the elastic side wall (121), and the middle part of the elastic side wall (121) in the height direction of the elastic side wall (121) is convex, and the upper and lower parts of the relatively convex part become narrow and take a slanted shape, so that the shrinkage deformation of the elastic side wall (121) becomes easy and the volume change can be large. As a result, the volume of the positive negative pressure chamber (120) increases according to the jar shape of the elastic side wall (121), and since the volume change of the elastic side wall (121) increases, when the positive negative pressure chamber (120) is adhered to the bonding surface, a strong negative pressure can be formed, so that a strong adhesive force can be provided.

[0047] In addition, the large volume change of the elastic side wall (121) can greatly increase the generation of capillary force due to moisture present on the bonding surface during bonding, which can provide strong adhesion, especially in a humid environment, for example, in an environment where a liquid drug is applied or body secretions are exposed.

[0048] Meanwhile, since the elastic side wall (121) is formed in a jar shape, the size of the inlet of the positive pressure chamber (120) can be reduced, which is advantageous for sealing. In other words, the smaller the inlet, the smaller the surface area that must be pressed against to maintain a vacuum state, and the negative pressure can be applied more locally and intensively, which is advantageous for sealing. Therefore, the bonding efficiency can be improved.

[0049] Additionally, a dry negative pressure adhesive patch according to one embodiment of the present invention may include an annular pad portion (122) extending radially from an edge of an inlet of a positive negative pressure chamber (120).

[0050] The annular pad portion (122) enables the inlet of the positive negative pressure chamber (120) to come into close contact with the contact surface and thereby expands the area where the inlet of the positive negative pressure chamber (120) comes into contact with the contact surface, thereby enabling more reliable sealing.

[0051] In one embodiment, the annular pad portion (122) may be expanded into a flat structure as shown in FIGS. 1 and 2.

[0052] In another embodiment, the annular pad portion (122) may be extended in a direction increasing from the surface of the patch (110) when expanding from the edge of the entrance of the positive pressure chamber (120) as shown in FIG. 4. At this time, it is preferable that the annular pad portion (122) be formed to have a predetermined curvature in a direction increasing from the surface of the patch (110) so as to facilitate attachment to a round attachment surface such as a face. According to the annular pad portion (122) according to this other embodiment, when attached to a round attachment surface such as a face, it is more securely attached and the negative pressure is well maintained.

[0053] Accordingly, a dry negative pressure adhesive patch according to one embodiment of the present invention can provide strong adhesive force by forming a strong negative pressure according to the large volume change of a plurality of positive negative pressure chambers (120), and can provide strong adhesive force even under high humidity conditions such as sweaty conditions when bonded to an adherend surface according to the large volume change of a plurality of positive negative pressure chambers (120), and the adhesive efficiency can be increased because the negative pressure can be applied more locally and intensively.

[0054] FIG. 5 shows a comparison of a shape (a) in which a plurality of positive negative pressure chambers (120) of a dry negative pressure adhesive patch according to the first embodiment of the present invention are arranged, and a shape (b) in which a cylindrical positive negative pressure chamber (20) having an annular pad portion (22) at the entrance is arranged as a comparative example.

[0055] As shown in FIG. 5, in a dry negative pressure adhesive patch according to one embodiment of the present invention, a plurality of positive negative pressure chambers (120) having an annular pad portion (122) at the entrance are arranged on the surface of the patch (110), and when the patch (110) and the plurality of positive negative pressure chambers (120) are integrally formed, the space between the positive negative pressure chambers (120) below the annular pad portion (122) can be utilized to expand the volume of the positive negative pressure chambers (120) so that they have a jar shape. In contrast, when cylindrical positive negative pressure chambers (20) are arranged, the space below the annular pad portion (22) cannot be utilized, and thus a loss of the space between the positive negative pressure chambers (20) may occur.

[0056] Accordingly, the dry negative pressure adhesive patch according to the first embodiment of the present invention can have a plurality of positive negative pressure chambers (120) more densely arranged on the surface of the patch (110), and according to this arrangement, when bonded to the bonding surface, it can be bonded while forming a more dense negative pressure, which can be more advantageous for bonding.

[0057] Second Example

[0058] FIG. 6 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a second embodiment of the present invention.

[0059] Referring to FIG. 6, a dry negative pressure adhesive patch (210) according to a second embodiment of the present invention is a dry negative pressure adhesive patch including a patch (210) having a flat surface; and a plurality of positive negative pressure chambers (220) on the patch (210), wherein the positive negative pressure chambers (220) include elastic side walls (221) extending from the surface of the patch (210), and the elastic side walls (221) have a horizontal cross-sectional shape parallel to the surface of the patch (210) in the form of a ring, and may be formed such that the diameter gradually increases from the entrance to the bottom and then decreases.

[0060] In addition, the elastic side wall (221) can have a curvature that can be restored after being contracted and deformed to become more concave when pressure is applied in a vertical direction while the inlet is in close contact with the bonding surface.

[0061] Meanwhile, the positive negative pressure chamber (220) may include an annular pad portion (222) extending radially from the edge of its entrance. Since the annular pad portion (222) is the same as the annular pad portion (222) described in the dry negative pressure adhesive patch according to the first embodiment of the present invention, a detailed description thereof will be omitted.

[0062] The dry negative pressure adhesive patch according to this second embodiment can be formed in a roughly gourd shape with the center portion of the positive negative pressure chamber (220) concave.

[0063] When vertical pressure is applied in the direction of the patch (210) for adhesion to the surface to be bonded, the positive negative pressure chamber (220) can form negative pressure through a process of shrinking and then restoring while the elastic side wall (221) is further deformed in a concave direction. Accordingly, since the contraction deformation of the elastic side wall (221) becomes easier, the volume of the positive negative pressure chamber (220) easily changes, and the process of forming negative pressure and bonding to the surface to be bonded can become easier.

[0064] Third Example

[0065] FIG. 7 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a third embodiment of the present invention.

[0066] Referring to FIG. 7, a dry negative pressure adhesive patch according to a third embodiment of the present invention comprises a patch (310) having a flat surface; and a plurality of positive negative pressure chambers (320, 330) on the patch (310), wherein the plurality of positive negative pressure chambers (320, 330) are alternately arranged so as to be adjacent to each other: a first positive negative pressure chamber (320) having an annular horizontal cross-sectional shape parallel to the surface of the patch (310) and an elastic side wall (321) extending from the surface of the patch (310) such that the diameter gradually increases from the inlet to the bottom and then decreases; and a second positive negative pressure chamber (330) having an annular horizontal cross-sectional shape parallel to the surface of the patch (310) and an elastic side wall (331) extending from the surface of the patch (310) such that the diameter gradually decreases from the inlet to the bottom and then increases.

[0067] The first positive negative pressure chamber (320) is identical to the jar-shaped positive negative pressure chamber (120) described in the dry negative pressure adhesive patch according to the first embodiment of the present invention, and the second positive negative pressure chamber (330) is identical to the roughly gourd-shaped positive negative pressure chamber (220) described in the dry negative pressure adhesive patch according to the second embodiment of the present invention, so a more detailed description will be omitted.

[0068] In addition, the first positive pressure chamber (320) and the second positive pressure chamber (330) include annular pad portions (322, 332) extending radially from the edge of their inlets. The annular pad portions (322, 332) are identical to the annular pad portion (122) described in the dry negative pressure adhesive patch according to the first embodiment of the present invention, and thus a detailed description thereof will be omitted.

[0069] In the dry negative pressure adhesive patch according to the third embodiment of the present invention, the first positive negative pressure chamber (320) in the shape of a jar and the second positive negative pressure chamber (330) in the shape of a roughly gourd are alternately arranged on the surface of the patch (310) so as to be adjacent to each other, so that the gap between the positive negative pressure chambers (320, 330) can be further narrowed.

[0070] That is, the convex elastic side walls (321, 331) of the first positive negative pressure chamber (320) can be arranged in a form that is accommodated in the concave portions of the concave elastic side walls (321, 331) of the second positive negative pressure chamber (330), so that the gap between the positive negative chambers (320, 330) can be further narrowed. Accordingly, a more dense arrangement of the positive negative pressure chambers (320, 330) on the surface of the patch (310) is possible.

[0071] Accordingly, the dry negative pressure adhesive patch according to the third embodiment of the present invention has the functions and effects of the jar-shaped positive negative pressure chambers (320, 330) and the roughly bottle-shaped positive negative pressure chambers (320, 330) described in the first and second embodiments, respectively, and can further increase the density of the positive negative pressure chambers (320, 330), and thus can be adhered while forming a more dense negative pressure when adhered to the bonding surface, which can be more advantageous for adhesion.

[0072] Example 4

[0073] FIG. 8 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a fourth embodiment of the present invention.

[0074] Referring to FIG. 8, a dry negative pressure adhesive patch according to a fourth embodiment of the present invention has an elastic side wall (421) of a positive negative pressure chamber (420) having the structure of the first embodiment of the present invention, and the positive negative pressure chamber (420) may include a protrusion (430) having a spherical shape that is slightly larger than a spherical or hemispherical shape protruding from its base surface.

[0075] The height of the protrusion (430) is smaller than the depth of the positive pressure chamber (420) (the height of the elastic side wall ()), and the longest length in the horizontal direction of the horizontal plane is shorter than the horizontal length inside the positive pressure chamber (420) before attachment to the skin-adhesive surface, so that it does not touch the elastic side wall (421) of the positive pressure chamber (420), and when applied to the skin-adhesive surface, the protrusion (430) touches the elastic side wall (421) due to deformation of the elastic side wall (421) and deformation of the protrusion (430), and by this contact (contact), a moisture absorption space between the base surface and the elastic side wall (421) can be formed, and when applied to the wet skin-adhesive surface, moisture moves to the moisture absorption space, so that strong adhesiveness can be provided in a wet skin environment.

[0076] Example 5

[0077] FIG. 9 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to a fifth embodiment of the present invention.

[0078] Referring to FIG. 9, a dry negative pressure adhesive patch according to a fifth embodiment of the present invention has an elastic side wall (521) of a positive negative pressure chamber (520) having the structure of the second embodiment of the present invention, and the positive negative pressure chamber (520) may include a protrusion (530) having a spherical shape that is slightly larger than a spherical or hemispherical shape protruding from its base surface.

[0079] The height and the longest length in the horizontal direction of the protrusion (530) may be the same as the arrangement structure in which the protrusion (530) and the elastic side wall (521) do not normally touch each other according to the fourth embodiment of the present invention, but the elastic side wall (521) and the protrusion (530) touch each other when applied to the skin-adhesive surface.

[0080] As the protrusion (530) is provided, a moisture absorption space described in the fourth embodiment of the present invention can be formed, and when applied to a wet skin-adhesive surface, moisture moves to the moisture absorption space, thereby providing strong adhesiveness in a wet skin environment.

[0081] Example 6

[0082] Fig. 10 is a cross-sectional view illustrating a dry negative pressure adhesive patch according to the sixth embodiment of the present invention.

[0083] Referring to FIG. 10, a dry negative pressure adhesive patch according to a fifth embodiment of the present invention has an elastic side wall (621, 631) of a positive negative pressure chamber (620, 630) having the structure of the third embodiment of the present invention, and the positive negative pressure chamber (620, 630) may include a protrusion (640) having a spherical shape that is slightly larger than a spherical or hemispherical shape protruding from its base surface.

[0084] As the protrusion (640) is provided, a moisture absorption space as described in the fourth embodiment of the present invention can be formed, and when applied to a wet skin-adhesive surface, moisture moves to the moisture absorption space, thereby providing strong adhesiveness in a wet skin environment.

[0085] The description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments without departing from the scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments disclosed herein, but is to be construed in the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dry negative pressure adhesive patch comprising a patch having a flat surface; and a plurality of positive negative pressure chambers on the patch, The above-mentioned biconvex negative pressure chamber is, Including an elastic side wall extending from the above patch surface, The elastic side wall has a horizontal cross-sectional shape parallel to the patch surface, which is a circular ring, an elliptical ring, or a polygonal ring, and is formed such that the diameter of the circle from the entrance to the bottom, the distance between the major or minor axes of the ellipse, or the length of one side of the polygon gradually increases and then decreases. Dry negative pressure adhesive patch.

2. In paragraph 1, The above elastic side wall has a curvature that can be restored after shrinking and deforming to become more convex when pressure is applied in a vertical direction while the inlet is in close contact with the bonding surface. Dry negative pressure adhesive patch.

3. In paragraph 1, The above-mentioned pressure chamber includes an annular pad portion extending radially from the edge of its inlet. Dry negative pressure adhesive patch.

4. In paragraph 4, It is characterized in that it expands in a direction increasing from the patch surface when expanding from the edge of the entrance of the above-mentioned annular pad portion. Dry negative pressure adhesive patch.

5. A dry negative pressure adhesive patch comprising a patch having a flat surface; and a plurality of positive negative pressure chambers on the patch, The above-mentioned biconvex negative pressure chamber is, Including an elastic side wall extending from the above patch surface, The elastic side wall has a horizontal cross-sectional shape parallel to the patch surface, which is a circular ring, an elliptical ring, or a polygonal ring, and is formed such that the diameter of the circle, the distance between the major or minor axes of the ellipse, or the length of one side of the polygon gradually decreases and then increases from the entrance to the bottom. Dry negative pressure adhesive patch.

6. In paragraph 5, The above elastic side wall has a curvature that can be restored after shrinking and deforming to become more concave when pressure is applied in a vertical direction while the inlet is in close contact with the bonding surface. Dry negative pressure adhesive patch.

7. In paragraph 6, The above-mentioned pressure chamber includes an annular pad portion extending radially from the edge of its inlet. Dry negative pressure adhesive patch.

8. In paragraph 7, It is characterized in that it expands in a direction increasing from the patch surface when expanding from the edge of the entrance of the above-mentioned annular pad portion. Dry negative pressure adhesive patch.

9. A dry negative pressure adhesive patch comprising a patch having a flat surface; and a plurality of positive negative pressure chambers on the patch, The above multiple positive pressure chambers are, A first positive negative pressure chamber having an elastic side wall extending from the patch surface such that the horizontal cross-sectional shape parallel to the patch surface is a circular ring, an elliptical ring, or a polygonal ring, and the diameter of the circle, the distance between the major or minor axes of the ellipse, or the length of one side of the polygon gradually increases and then decreases from the entrance to the bottom; and Second positive pressure chambers having elastic side walls extending from the patch surface such that the horizontal cross-sectional shape parallel to the patch surface is a circular ring, an elliptical ring or a polygonal ring, and the diameter of the circle from the entrance to the bottom, the distance between the major or minor axes of the ellipse or the length of one side of the polygon gradually decreases and then increases, are arranged alternately adjacent to each other. Dry negative pressure adhesive patch.

10. In paragraph 9, The elastic side wall of the first positive pressure chamber has a curvature that can be restored after being contracted to become more convex when pressure is applied in a vertical direction while the entrance is in close contact with the bonding surface. The elastic side wall of the second positive pressure chamber has a curvature that can be restored after being contracted to become more concave when pressure is applied in a vertical direction while the entrance is in close contact with the bonding surface. Dry negative pressure adhesive patch.

11. In paragraph 9, The first positive pressure chamber and the second positive pressure chamber include an annular pad portion extending radially from the edge of the inlet thereof. Dry negative pressure adhesive patch.

12. In paragraph 11, It is characterized in that it expands in a direction increasing from the patch surface when expanding from the edge of the entrance of the above-mentioned annular pad portion. Dry negative pressure adhesive patch.

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