TW202245573A - Wearable device - Google Patents

Abstract

A wearable device with a display module is provided. The display module includes an upper substrate, a lower substrate, and a display layer located between the upper and lower substrates. A sealant is filled in the gap between the upper and lower substrates and is located on the side of the display layer. A retaining wall is arranged around the display module. The inner side of the retaining wall is provided with two annular grooves corresponding to the upper and lower substrates. Each annular groove is provided with a sealing member including a mounting side and a fixed side. The mounting side has a plurality of fingers, and the fingers abut against the bottom of the corresponding annular groove to form multiple contact points. The fixed side has a raised portion, and the raised portion is against the upper or lower substrate corresponding to the annular groove. Therefore, the display module can be fixed, and the infiltration of the external moisture or chemical substances can be effectively prevented.

Description

wearable device

The present invention relates to a wearable device, in particular to a wearable device using a double-layer sealing member to protect a display layer structure.

The components of the display module of the wearable device include a display layer, and the display layer usually includes a light-emitting diode or an organic light-emitting diode, a polarizer, a solid optical adhesive (OCA), and the like. Some film materials in the display layer (such as polarizers) are easily eroded by chemical substances such as water vapor, sebum, and sweat. Therefore, in order to prevent water vapor or chemical substances from entering the display module and eroding the display layer, which will cause product failure or affect the display effect, A commonly used protection method, such as a display module 50 shown in Figure 1, is to set the display layer 30 to shrink inwards compared with the base material 10, 20, and seal the display layer structure 30 side points Glue 40, to be sealed. However, the protection method of simply dispensing glue is difficult to fully prevent the erosion of water vapor or various chemical substances, and there is a risk of glue opening.

In order to solve such protection requirements, a protection structure 70 around the periphery of the display module 50 can be further added in the wearable device. As shown in FIG. 2, the protective structure 70 is fixed between the substrates 10, 20 and the retaining wall 60 to prevent the infiltration of water vapor and chemical substances, and the use of the protective structure 70 will also fix the display module 50, It can act as a buffer when it is hit by an external force. However, the protective structure 70 generally uses an O-ring structure with a circular cross section. There are four contact points between the O-ring and the side of the display module 50 and the retaining wall 60. The force-bearing area of the O-ring is small, and it is easy to Rotation is difficult to play a good role in fixing and protecting the display module 50 .

Therefore, the current industry urgently needs to find a wearable device that can not only effectively block the invasion of water vapor and chemical substances, but also effectively fix the display module, so that the various difficulties and deficiencies encountered in the above-mentioned conventional technologies can be solved. .

In view of the above problems, the main purpose of the present invention is to provide a wearable device, which uses a double-layer seal and improves the structure of the seal, which can effectively protect and fix the display module so as to resist the impact of external force. At the same time, it can effectively Prevent the intrusion of substances such as water vapor and chemicals, so as to ensure the reliability of the product.

In order to achieve the above object, the present invention provides a wearable device, which includes a display module, a retaining wall and two seals. The display module includes an upper substrate, a display layer and a lower substrate, the display layer is arranged on the lower substrate, the upper substrate is arranged on the display layer, and is formed between the side of the display layer and the upper substrate and the lower substrate. There is a gap, and the sealant is filled in the gap. The retaining wall surrounds the display module, and the inner side of the retaining wall is provided with two ring-shaped grooves, and the two ring-shaped grooves respectively correspond to the upper base material and the lower base material. The two seals are respectively arranged in the two annular grooves, the side of each seal in contact with the bottom of the corresponding annular groove is defined as the installation side, and the side of each seal in contact with the display module is defined as The fixed side and a fixed side, the installation side has a plurality of fingers, these fingers are against the bottom of the corresponding annular groove to form a plurality of contact points, while the fixed side has a protrusion, the protrusion and The upper substrate or the lower substrate corresponding to the annular groove is offset.

In one embodiment of the present invention, each of the above-mentioned seals further has a palm, and the two opposite sides of the palm are respectively connected with the plurality of fingers and the protrusion, and the plurality of fingers and the protrusion are respectively connected to each other. The risers extend in opposite directions.

In one embodiment of the present invention, the top surface and the bottom surface of the above-mentioned palm part respectively adhere to the two side walls connecting the bottom of the annular groove.

In an embodiment of the present invention, the above-mentioned protruding portion protrudes from the top surface of the palm portion and abuts against the upper base plate or the lower base plate.

In an embodiment of the present invention, the ratio of the width of each sealing member to the width of each annular groove is between 1˜1.2.

In one embodiment of the present invention, each of the above-mentioned seals has a top layer, a center layer and a bottom layer in sequence from top to bottom, the top layer is the plane where the lowest end of the protrusion is located, and the center layer is two times the width of each seal. One-third of the plane is located, and there is a chamfer or rounded corner under the fixed side, and the bottom layer is the plane where the starting point of the chamfered corner or rounded corner is located.

In one embodiment of the present invention, the central total thickness of each sealing member is the radial length of the central layer plus the radial length of the fingers, and the central total thickness of each sealing member is the same as that of each annular groove The ratio of the radial depth is between 0.9 and 1.

In one embodiment of the present invention, the central total thickness of each sealing member is the radial length of the central layer plus the radial length of the fingers, and the ratio of the central total thickness to width of each sealing member is between 0.8 ~0.9.

In one embodiment of the present invention, the ratio of the radial length of the top layer to the radial length of the central layer of each sealing member is between 0.8-0.9.

In one embodiment of the present invention, the ratio of the radial length of the central layer to the radial length of the bottom layer of each sealing member is between 0.8-0.9.

In an embodiment of the present invention, the ratio of the radial length of the top layer of each sealing element to the radial length of the fingers is between 6-10.

In an embodiment of the present invention, the ratio of the radial length of the top layer of each sealing member to the radial length of the protrusion is between 2-10.

In one embodiment of the present invention, the radius of the rounded corners of each of the sealing elements is 1/3˜1/10 of the radial length of the central layer.

In an embodiment of the present invention, the ratio of the radial length to the width of the fingers of each sealing member is between 0.6-1.

In an embodiment of the present invention, the material of the above-mentioned sealing member may be nitrile rubber, EPDM rubber, silicon rubber, fluororubber, perfluororubber or polyurethane rubber.

In one embodiment of the present invention, the above-mentioned seal is made of perfluororubber.

In one embodiment of the present invention, there are gaps of 0-2 mm between the above-mentioned retaining wall and the upper substrate, and between the retaining wall and the lower substrate, respectively.

Compared with the prior art, the wearable device provided by the present invention, in addition to the sealing process of side glue dispensing on the display module, is also equipped with a double-layer seal with a special structural design, and The retaining wall is provided with two ring-shaped grooves which can be installed by the sealing member and respectively correspond to the upper substrate and the lower substrate, so that the double-layer sealing member can be fixed between the retaining wall and the display module. The side of each sealing member in contact with the annular groove has a plurality of fingers to offset the annular groove, these fingers increase the contact area between the sealing member and the bottom of the annular groove, and have a good The buffering effect of the sealing member is on the side where the display module is in contact with the raised part, and the raised parts of the double-layer sealing member are against the upper substrate and the lower substrate respectively, so the present invention can effectively prevent external water vapor or chemical The infiltration and erosion of the material plays a role in fixing the display module.

In the following, a detailed description will be made through the specific embodiments and the accompanying drawings, so that it will be easier to understand the purpose, technical content, characteristics and effects of the present invention.

Embodiments of the present invention will be further explained in conjunction with related figures below. Wherever possible, the same reference numerals have been used throughout the drawings and description to refer to the same or similar components. In the drawings, the shape and thickness may be exaggerated for the sake of simplification and convenient labeling. It should be understood that elements not particularly shown in the drawings or described in the specification are forms known to those skilled in the art. Those skilled in the art can make various changes and modifications according to the content of the present invention.

Please refer to Figure 3, which shows a schematic cross-sectional view of a wearable device provided according to an embodiment of the present invention; please also refer to Figure 4, which shows a cross-sectional view of a sealing member provided according to an embodiment of the present invention schematic diagram.

The wearable device shown in FIG. 3 includes a display module 150 , a retaining wall 160 and two seals 170 , 180 . Wherein, the display module 150 is composed of an upper substrate 110 , a lower substrate 120 and a display layer 130 located between the upper substrate 110 and the lower substrate 120 . The upper substrate 110 and the lower substrate 120 are vertically and parallelly arranged. The upper substrate 110 and the lower substrate 120 are used as a protective layer on the outside of the display module 150, and their materials can be glass, polycarbonate (PC), polymethyl methacrylate (PMMA), cycloolefin copolymer ( COC) and other high-transmittance transparent materials, of course, are not limited to this in practice. The display layer 130 includes light-emitting diodes or organic light-emitting diodes, and optical films such as polarizers and solid optical glue. The display layer 130 is retracted relative to the upper substrate 110 and the lower substrate 120, and a gap 131 is formed on the side of the display layer 130 and between the upper substrate 110 and the lower substrate 120, and the gap 131 is filled with a sealant The glue 140 can seal the display layer 130, and can reduce the chances of the various film materials in the display layer 130 being corroded by water vapor or chemical substances.

In addition, the retaining wall 160 surrounds the display module 150 and surrounds the sides of the upper substrate 110, the lower substrate 120 and the display layer 130, and the inside of the retaining wall 160 corresponds to the upper substrate 110 and the lower substrate 120 respectively. There are two ring-shaped grooves 161 , and the two ring-shaped grooves 161 are arranged around the upper base material 110 and the lower base material 120 respectively. The purpose of the retaining wall 160 is to fix and protect the frame of the display module 150. The material of the retaining wall 160 mainly includes macromolecule materials such as acetate fiber, acrylic resin, epoxy resin, and polyamide, or nickel alloy, copper alloy, titanium alloy, etc. Metal materials such as titanium alloy and titanium alloy, of course, are not limited to this in practice. There are gaps of 0-2 mm between the retaining wall 160 and the upper substrate 110 and between the retaining wall 160 and the lower substrate 120 respectively.

The two seals 170 are respectively arranged in the two annular grooves 161 of the retaining wall 160, and the two seals 170 corresponding to the two annular grooves 161 are also arranged around the upper base material 110 and the lower base material 120 respectively. Therefore, it is fixed between the retaining wall 160 and the display module 150 . In the present invention, the side of each sealing member 170 in contact with the bottom of the annular groove 161 is defined as the installation side 175 (see the left side in FIG. 4 ), and the side of each sealing member 170 in contact with the display module 150 Defined as the fixed side 174 (see the right side in the fourth figure); further, each seal 170 has a palm 176, and the palm 176 is connected to a plurality of fingers 171 and a raised portion 172 respectively, and the plurality of fingers The finger portion 171 and the raised portion 172 are respectively located on two opposite sides of the palm portion 176, namely the above-mentioned mounting side 175 and the fixed side 174, and these finger portions 171 and the raised portion 172 extend in opposite directions, while the palm portion 176 The top surface and the bottom surface of the ring groove 161 are respectively attached to the two side walls connecting the bottom of the groove. Still further, a plurality of fingers 171 are arranged at intervals on one side of the palm 176 (that is, the installation side 175), and the size of each finger 171 is about the same size, as shown in Fig. 3 and Fig. 4, the fingers The ends of the structure of the fingers 171 can be square, and the concave surface between two adjacent fingers 171 can be flat, or the ends of the fingers 171 can be sharp. These fingers 171 are against the groove bottom of the annular groove 161, and can form multiple contact points between the sealing member 170 and the groove bottom of the annular groove 161, greatly increasing the contact between the sealing member 170 and the retaining wall 160 area, and has a good cushioning effect; preferably, the number of fingers 171 of each sealing member 170 can be 2-20. In addition, the protruding portion 172 protrudes outward from the place where the top surface of the palm portion 176 bears the annular groove 161 (that is, above the fixed side 174 ), and abuts against the upper substrate 110 or the lower substrate corresponding to the annular groove 161 120; in this embodiment, the protruding portion 172 is a rib-shaped protruding portion, however, the shape of the protruding portion 172 is not limited in practice, and the protruding portion 172 can also be arranged at any position on the fixed side 174, As long as it can resist the display module 150 to achieve a fixed effect. The surface of the fixed side 174 is substantially inclined downward from the protrusion 172 , and a chamfer or rounded corner 173 is formed below the fixed side 174 . Compared with sharp corners, the design of the chamfered or rounded corners 173 helps the sealing member 170 to be easier to inject and demould during molding. When the double-layer seal 170 of the present invention is installed on the retaining wall 160, the raised portion 172 of the top seal 170 will be closely against the upper substrate 110, thereby strengthening the sealing effect and further preventing any moisture or chemical substances from the outside from entering Into the display module 150, the display layer 130 will be damaged, and at the same time, the raised portion 172 of the bottom sealing member 170 will be closely against the lower substrate 120, so that the display module 150 can be fixed, and the sealing member 170 can provide The cushioning effect can prevent the display module 150 from being damaged by external impact.

The present invention uses the double-layer seal 170 as the protective structure of the display layer 130, so that the wearable device will not affect the display performance of the product due to the intrusion of environmental water vapor, sebum sweat and other chemical agents, and at the same time provide a cushioning and fixing effect. In order to ensure the protective effect of the sealing member 170 on the multilayer optical film structure 130 , the material selection and shape design of the sealing member 170 are particularly important. In the present invention, the material of the sealing member 170 includes nitrile rubber (NBR), ethylene propylene diene monomer (EPDM), silicon rubber (Silicone), fluororubber (FKM), perfluororubber (FFKM) or polyurethane rubber (AU or EU ), and fluororubber can include fluorocarbon rubber, fluorinated hydrocarbon rubber (Viton), etc., and it is not limited to this in practice.

The primary consideration in the application of seal 170 is usually compression set. Generally, the material used for the sealing member 170 is fluorinated elastomer, and the higher the viscosity of the fluorinated elastomer, the lower the compression deformation rate. The seal material needs to have small friction and good wear resistance with the moving parts, so as to increase the working life of the seal and still have a good sealing and shock absorption effect to a certain extent after wear. As for pressure resistance and durability, the lower the hardness of the sealing member 170, the greater the compression; the higher the hardness, the smaller the compression. In addition, it is also suggested that the sealing member 170 can be selected from rubber products with good elasticity, aging resistance, and corrosion resistance, and it must be ensured that the materials of the sealing member 170 and the display layer 130 cannot interact with chemical substances after reliability tests. Specifically, the material of the sealing member 170 is preferably a perfluorinated rubber material. Since the carbon atoms of the main chain or side chain in the constituent molecules of perfluororubber are all bonded to fluorine atoms, it has a higher fluorine content than fluororubber. Therefore, perfluororubber has the best temperature resistance and durability among all elastomers. Chemical resistance, and the perfluororubber also has the characteristics of hydrophobic and oleophobic, so that the protective performance of the perfluororubber as the seal 170 is more excellent. In the embodiment of the present invention, the sealing member 170 is made of perfluororubber; the fluorine content of the perfluororubber is 60%-80%, the hardness is 70-86 shore A, and the compressive deformation rate (the test method is ASTM D395 method B, 70hrs@200℃) is 15-35%, its high temperature resistance reaches 260-325℃, and it can resist strong acids, strong alkalis, ethers, ketones, esters, alcohols and nitrogen-containing compounds.

Next, the detailed structure of the seal 170 designed in the embodiment of the present invention will be described.

In this embodiment, it is defined that each annular groove 161 has a width W and a radial depth D (see Figure 3), and each seal 170 is roughly divided into top layer A and center layer B from top to bottom. With the bottom layer C (see Figure 4), the top layer A has a raised portion 172 extending on the fixed side, and the top layer A, the central layer B and the bottom layer C are connected with a plurality of fingers 171 on the installation side; specifically, the top layer A is a raised portion 172. The plane where the lowermost end of the rising part 172 is located, the central layer B is the plane where the half of the width g of each sealing member 170 is located, and the bottom layer C is the plane where the starting point of the chamfer or rounded corner 173 is located. Each seal 170 has a width g, and the top layer A, central layer B, and bottom layer C of each seal 170 have radial lengths a, b, and c, respectively, the fingers 171 have a radial length e and width f, and the protrusion The portion 172 has a radial length d, and the central total thickness of each seal 170 is the radial length b of the central layer B plus the radial length e of the fingers 171 . In this embodiment, each sealing member 170 preferably satisfies one or more of the following conditions (1)-(8): (1) The ratio of the width g of each sealing member 170 to the width W of each annular groove 161 is between 1 and 1.2. (2) The ratio of the central total thickness (b+e) of each sealing member 170 to the radial depth D of each annular groove 161 is between 0.9-1. (3) The ratio of the central total thickness (b+e) to the width g of each sealing member 170 is between 0.8 and 0.9. (4) The ratio of the radial length a of the top layer A of each seal 170 to the radial length b of the central layer B is between 0.8 and 0.9. (5) The ratio of the radial length b of the central layer B of each seal 170 to the radial length c of the bottom layer C is between 0.8 and 0.9. (6) The ratio of the radial length a of the top layer A of each seal 170 to the radial length e of the fingers 171 is between 6 and 10. (7) The ratio of the radial length a of the top layer A of each seal 170 to the radial length d of the raised portion 172 is between 2 and 10. (8) The ratio of the radial length e to the width f of the fingers 171 of each seal 170 is between 0.6 and 1. (9) The radius of the rounded corner 173 of each seal 170 is 1/3 to 1/10 of the radial length b of the central layer B. (10) The angle range of the chamfer of each seal 170 is between 0 and 90 degrees.

Satisfying the above condition (1) is beneficial for the sealing member 170 to be tightly locked in the annular groove 161 . Satisfying the above condition (2) is beneficial for the sealing member 170 to fix the display module 150 well. Satisfy the above conditions (4), (5), (9) and (10), so that the radial length a>radial length b>radial length c, to form a slope that shrinks downward from the raised portion 172, and In turn, chamfers or rounded corners are formed, which is beneficial to injection molding processing. Further satisfying other conditions (3), (6) to (8) will help the wearable device provided by the present invention to provide outstanding impact resistance and excellent sealing performance, which can reduce damage caused by dropping or accidental impact. damage, and can effectively resist various erosions from the outside, such as water vapor, sebum, sweat and other chemical substances intruding into the interior of the display module 150, causing damage or failure of the film material of the display layer 130, thereby ensuring product quality and prolonging the use of the product life.

Finally, in order to verify the protective effect of the double-layer sealing member used in the embodiment of the present invention on the display layer, the following reliability test was performed.

Four chemical substances were selected for the reliability test: mixed sebum, lotion, soap, and synthetic tears. The four chemical substances were respectively coated on the display layer structure fixed by the retaining wall with seals, and tested at 65°C and humidity Under the condition of 90%RH, last for 72 hours, after the reliability test, observe whether the display layer will change due to chemical substance penetration or reaction with the seal, and choose the case without seal as the control group. Among them, mixed sebum is a mixture of artificial sebum, sweat and sunscreen.

Please refer to FIG. 5A-FIG. 5C , which are schematic diagrams showing the reliability test of the display module 150 coated with the chemical substance 190 using different protective structures. Among them, Figure 5A is a control group without a seal; Figure 5B is a single-layer circular seal 180; Figure 5C is a double-layer seal 170 of the present invention. The experimental results are shown in Figure 6A to Figure 6C, which are the test results corresponding to Figure 5A to Figure 5C respectively. It can be found that after the reliability test of the protective structure using no seal and single-layer circular seal, The display layer of the control group without seals has been corroded by chemicals to the inside, showing extensive whitening (see Figure 6A). The display layer of the single-layer circular seal has also been corroded by chemicals, and its edges Whitening occurs (Figure 6B), while the sample of the display layer using the double-layer seal as the protective structure of the present invention is still intact (see Figure 6C), it can be proved that the double-layer seal can effectively protect the display layer and prevent the penetration of chemical substances .

In summary, according to the wearable device provided by the present invention, its display module includes an upper substrate, a lower substrate, and a display layer between the upper and lower substrates, and the sealing process of the display module is performed by The sealant is filled in the gap between the side of the display layer and the upper and lower substrates for side dispensing, and there is a retaining wall around the display module, and a double-layer seal with a special structural design . Corresponding to the upper and lower substrates, the inside of the retaining wall is provided with two annular grooves for the installation of seals, so that the double-layer seals can be fixed between the retaining wall and the display module. The side of each seal that is in contact with the annular groove has multiple fingers to abut against the annular groove, these fingers increase the contact area between the seal and the bottom of the annular groove, and have good cushioning effect. The side of each seal that is in contact with the display module has a raised portion, and the raised portions of the double-layered seal are against the upper substrate and the lower substrate respectively. Thereby, the present invention can effectively fix and protect the display module, and at the same time, can effectively block the infiltration of external water vapor and chemical substances, so as to ensure the reliability and service life of the product.

The above-mentioned embodiments are only to illustrate the technical ideas and characteristics of the present invention, and the purpose is to enable those who are familiar with the art to understand the content of the present invention and implement it accordingly, and should not limit the patent scope of the present invention. , that is, all equivalent changes or modifications made according to the spirit disclosed in the present invention should still be covered by the patent scope of the present invention.

10: Substrate 20: Substrate 30: Display layer 40: sealant 50:Display module 60: retaining wall 70: Protective structure 110: upper substrate 120: lower substrate 130: display layer 131: Gap 140: sealant 150: display module 160: retaining wall 161: Annular groove 170: seal 171: finger 172: Raised part 173: Chamfer 174: fixed side 175: Installation side 176: palm 180: round seal 190: Chemical substances A: top floor B: center layer C: Bottom D: radial depth W: width a: radial length b: radial length c: radial length d: radial length e: radial length f: width g: width

Fig. 1 is a schematic diagram of side glue dispensing of a display module in the prior art. Fig. 2 is a schematic diagram of a display module with a protective structure added in the prior art. FIG. 3 is a schematic cross-sectional view of a wearable device according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a seal used in a wearable device according to an embodiment of the present invention. Figures 5A-5C are schematic diagrams of reliability tests using display modules with different protective structures; among them, Figure 5A is a control group without seals; Figure 5B is a single-layer circular seal; Figure 5C is Use the double layer seal of the present invention. Figures 6A-6C are optical microscope images of the surface of the display layer after the reliability test of display modules using different protective structures; among them, Figure 6A is a control group without seals; Figure 6B is a single-layer circular Seal; Fig. 6C is a double-layer seal using the present invention.

110: upper substrate

120: lower substrate

130: display layer

131: Gap

140: sealant

150: display module

160: retaining wall

161: Annular groove

170: seal

171: finger

172: Raised part

173: Chamfer

176: palm

D: radial depth

W: width

Claims (17)

A wearable device comprising: A display module, including; look at the base material; a display layer disposed on the lower substrate; an upper substrate, arranged on the display layer, and forming a gap between the side of the display layer and the upper substrate and the lower substrate; and A sealant, filled in the gap; A retaining wall surrounds the display module, and two ring-shaped grooves are arranged on the inside of the retaining wall, and the two ring-shaped grooves are respectively set corresponding to the upper substrate and the lower substrate; and Two seals are respectively clamped in the two ring-shaped grooves, and the side of each seal that is in contact with the bottom of the corresponding ring-shaped groove is defined as an installation side, and each seal is connected to the display module The contacting side is defined as a fixed side, and the installation side has a plurality of fingers, and these fingers abut against the groove bottom of the corresponding annular groove to form a plurality of contact points, and the fixed side has a protrusion, the The raised portion abuts against the upper substrate or the lower substrate corresponding to the annular groove. The wearable device as described in claim 1, wherein each sealing member further has a palm, and the two opposite sides of the palm are respectively connected with the fingers and the protrusion, and the fingers are connected with the The raised portions extend in opposite directions. The wearable device according to claim 2, wherein the top surface and the bottom surface of the palm are respectively attached to the two side walls connecting the bottom of the annular groove. The wearable device according to claim 2, wherein the protrusion protrudes from the top surface of the palm and abuts against the upper substrate or the lower substrate. The wearable device according to claim 1, wherein the ratio of the width of each sealing member to the width of each annular groove is between 1˜1.2. The wearable device according to claim 1, wherein each sealing member has a top layer, a center layer and a bottom layer in sequence from top to bottom, the top layer is the plane where the bottom end of the protrusion is located, and the center layer is each A plane where half of the width of a sealing member is located, and a chamfer or rounded corner is located below the fixed side, and the bottom layer is a plane where the starting point of the chamfered corner or rounded corner is located. The wearable device as described in claim 6, wherein the central total thickness of each sealing member is the radial length of the central layer plus the radial length of the fingers, and the central total thickness of each sealing member is the same as each The radial depth ratio of the annular groove is between 0.9-1. The wearable device as described in claim 6, wherein the central total thickness of each sealing member is the radial length of the central layer plus the radial length of the fingers, the central total thickness and width of each sealing member The ratio is between 0.8 and 0.9. The wearable device according to claim 6, wherein the ratio of the radial length of the top layer to the radial length of the central layer of each sealing member is between 0.8˜0.9. The wearable device according to claim 6, wherein the ratio of the radial length of the central layer to the radial length of the bottom layer of each sealing member is between 0.8-0.9. The wearable device according to claim 6, wherein the ratio of the radial length of the top layer of each sealing member to the radial length of the fingers is between 6-10. The wearable device according to claim 6, wherein the ratio of the radial length of the top layer of each sealing member to the radial length of the protrusion is between 2-10. The wearable device according to claim 6, wherein the radius of the rounded corner of each sealing member is 1/3˜1/10 of the radial length of the central layer. The wearable device as claimed in claim 1, wherein the ratio of the radial length to the width of the fingers of each sealing member is between 0.6˜1. The wearable device according to claim 1, wherein the seals are made of nitrile rubber, EPDM rubber, silicon rubber, fluororubber, perfluororubber or polyurethane rubber. The wearable device according to claim 15, wherein the seals are perfluorinated rubber. The wearable device according to claim 1, wherein there are gaps of 0-2 mm between the retaining wall and the upper substrate and between the retaining wall and the lower substrate, respectively.

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