Watchband and wearable device

Abstract

This application discloses a watch strap and a wearable device. The watch strap includes a fluororubber substrate layer, an adhesive layer, and a color-changing layer. Along the thickness direction of the watch strap, the fluororubber substrate layer and the color-changing layer are located on opposite sides of the adhesive layer. Based on the above structure, the adhesive layer can better bond the color-changing layer with the fluororubber substrate layer, which helps to prevent the color-changing layer from falling off the fluororubber substrate layer. In addition, the combination of the fluororubber substrate layer, the adhesive layer, and the color-changing layer has the following advantages: First, the surface of the fluororubber substrate layer opposite to the color-changing layer comes into contact with the human body. The high elasticity and skin-friendliness of the fluororubber substrate layer conform to the wrist and are suitable for long-term wear. Second, the color-changing layer and the adhesive layer can reduce the direct exposure of the fluororubber substrate layer to ultraviolet rays or abrasion, further improving durability. Finally, the low density of fluororubber makes the fluororubber substrate layer lighter, and the color-changing layer and the adhesive layer are also lighter, avoiding the heaviness of traditional metal or ceramic watch straps.

Description

Technical Field

[0001] This application relates to color-changing devices, and more particularly to watch straps and wearable devices. Background Technology

[0002] Wearable devices, such as watches and wristbands, all include watch straps. These straps include a color-changing layer. However, technicians have discovered that the color-changing layer on these straps is prone to peeling off. Therefore, it is necessary to improve the watch straps to better prevent this peeling process. Utility Model Content

[0003] The purpose of this application is to disclose a watch strap and wearable device that helps prevent the color-changing layer from peeling off.

[0004] In a first aspect, this application discloses a watch strap. The watch strap includes a fluororubber substrate layer, an adhesive layer, and a color-changing layer, wherein the fluororubber substrate layer and the color-changing layer are located on opposite sides of the adhesive layer along the thickness direction of the watch strap.

[0005] In some embodiments, the adhesive layer is made of epoxy resin, and / or, along the thickness direction of the strap, the thickness of the adhesive layer is d, 3μm≤d≤10μm.

[0006] In some embodiments, the color-changing layer is composed of an oil film, and is a pressure-sensitive color-changing layer, a photochromic layer, a thermochromic layer, or an aqueous color-changing layer.

[0007] In some embodiments, the watch strap includes a fixing layer, and the fixing layer and the adhesive layer are located on opposite sides of the color-changing layer along the thickness direction of the watch strap.

[0008] In some embodiments, the thickness of the fixing layer along the thickness direction of the watch strap is f, where 5μm≤f≤15μm; and / or, the material of the fixing layer is latex paint.

[0009] In some embodiments, the number of the adhesive layers is equal to the number of the fixing layers; the adhesive layers, the color-changing layers, and the fixing layers are stacked sequentially in a direction away from the fluororubber substrate; or, the number of the fixing layers is not equal to the number of the adhesive layers.

[0010] In some embodiments, the color-changing layer is a photochromic layer; when the intensity of ultraviolet light reaches a preset intensity, all color-changing layers change color; or, when the intensity of ultraviolet light reaches the intensity of the corresponding color-changing layer, the corresponding color-changing layer changes color.

[0011] In some embodiments, the thickness of the color-changing layer along the thickness direction of the watch strap is m, 10μm≤m≤15μm; and / or, the material of the color-changing layer is an organic photochromic oil film.

[0012] In some implementations, the color-changing layer is provided with special symbols, text, numbers, textures, or patterns.

[0013] Secondly, this application discloses a wearable device. The wearable device includes any of the aforementioned watch straps.

[0014] For the aforementioned watchband or wearable device, since the watchband comprises a fluororubber substrate layer, an adhesive layer, and a color-changing layer, the adhesive layer interacts with the color-changing layer and the fluororubber substrate layer through interfacial chemical bonding, allowing the color-changing layer to better bond with the fluororubber substrate layer. This helps prevent the color-changing layer from detaching from the fluororubber substrate layer (in the case of an oil film layer, the aforementioned adhesive layer helps prevent oil film detachment). Furthermore, the combination of the fluororubber substrate layer, adhesive layer, and color-changing layer, with the fluororubber substrate layer facing away from the color-changing layer and in contact with the human body, allows for high elasticity and skin-friendliness, conforming to the wrist and suitable for prolonged wear. Additionally, the low density of fluororubber makes the fluororubber substrate layer lighter, as are the individual weights of the color-changing layer and adhesive layer, avoiding the heaviness of traditional metal or ceramic watchbands. Finally, the watch strap includes a fluororubber substrate layer. Fluororubber is resistant to high temperatures, chemical corrosion (oil, acid, solvent), and aging, making it suitable for extreme environments (such as outdoor and industrial scenarios) and resulting in a long watch strap lifespan. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the first type of watch strap in this application that does not change color;

[0016] Figure 2 This is a schematic diagram of the first type of watch strap after color change, showing that both color-changing layers of the watch strap have changed color.

[0017] Figure 3 This is a cross-sectional view of the second type of watch strap in this application;

[0018] Figure 4 This is a cross-sectional view of the third type of watch strap in this application. Detailed Implementation

[0019] The technical solutions in the embodiments (or "implementations") of this application will be clearly and completely described herein with reference to the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0020] If the embodiments of this application contain terms relating to directional indications or positional relationships (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, transverse, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationships and movements between components in a specific posture (as shown in the attached figures); if the specific posture changes, the directional indications or positional relationships will also change accordingly. Furthermore, the terms "first" and "second" used in the embodiments of this application are only for descriptive convenience and should not be construed as indicating or implying relative importance.

[0021] See Figure 1 , Figure 2 , Figure 3 and Figure 4 , Figure 1 and Figure 2 The first type of watch strap was revealed. Figure 3 and Figure 4 The second and third types of watch straps are disclosed respectively. All three types of watch straps include a fluororubber substrate layer 1, an adhesive layer 2, and a color-changing layer 3. The fluororubber substrate layer refers to a layer made of fluororubber. One embodiment of manufacturing the fluororubber substrate layer is as follows: 1) Fluororubber raw material is mixed; 2) The fluororubber raw material is pre-formed; 3) The pre-formed product is placed into a conforming fixture; 4) The fixture from step 3 is placed into a hot-pressing mold; 5) The hot-pressing machine with adjusted parameters is started for hot-pressing; 6) The product after hot-pressing in step 6 is placed in a liquid nitrogen press for 20 minutes to remove burrs; 7) The deburred product is washed with water for 30 minutes; 8) The washed product is dried for 120 minutes; 9) The product surface is wiped clean with an alcohol-soaked lint-free cloth and placed in a cleanroom. One function of the adhesive layer 2 is to prevent the color-changing layer 3 from peeling off; it is sufficient to serve this purpose, and the material is not limited. The color-changing layer 3 is a layer capable of changing color, and is not limited to pressure-sensitive, photochromic, thermochromic, or water-sensitive layers. The pressure-sensitive layer changes color based on the pressure the watch band experiences. The photochromic layer changes color under light exposure (such as ultraviolet light). The thermochromic layer changes color based on ambient temperature or the consumer's body temperature. The water-sensitive layer refers to a layer that changes color when the watch band comes into contact with water.

[0022] See Figure 3 and Figure 4 Along the thickness direction of the watch strap, the fluororubber substrate layer 1 and the color-changing layer 3 are located on opposite sides of the adhesive layer 2. Figure 3 and Figure 4The illustration shows that the bite-resistant layer 2 and the color-changing layer 3 each have multiple layers because the surface band has various variations. Those skilled in the art will understand that the number of each layer (bite-resistant layer 2 and color-changing layer 3) is set according to requirements, with at least one layer. In the embodiments of this application, the bite-resistant layer 2 is printed on the fluororubber substrate layer 1, and the color-changing layer 3 is printed on the surface of the bite-resistant layer 2 opposite to the fluororubber substrate layer 1. Thus, with reference to the bite-resistant layer 2, the fluororubber substrate layer 1 and the color-changing layer 3 are located on opposite sides of the bite-resistant layer 2.

[0023] based on Figure 3 and Figure 4 The structure of the watch strap shown is illustrated using a watch as an example of a wearable device including the watch strap. Figure 1 and Figure 2 The watch consists of the watch body (not shown in the picture) and the watch strap. Figure 1 The watch straps shown are the left strap 11 and the right strap 12, which are connected to the watch body. Figure 1 The watch strap remains unchanged in color. Figure 2 This is the state of the watch strap after it has changed color, relatively Figure 1 and Figure 2 It is known that both the left watch strap 11 and the right watch strap 12 include a fluororubber substrate layer 1, an adhesive layer 2, and a color-changing layer 3. Moreover, almost all areas of the watch strap can change color. Those skilled in the art can understand that only some areas of the watch strap can change color.

[0024] As described above, since the watchband includes a fluororubber substrate layer 1, an adhesive layer 2, and a color-changing layer 3, the adhesive layer 2 interacts with the color-changing layer 3 and the fluororubber substrate layer 1 through interfacial chemical bonding, allowing the color-changing layer 3 to better bond with the fluororubber substrate layer 1. This helps prevent the color-changing layer 3 from detaching from the fluororubber substrate layer 1 (in the case where the color-changing layer 3 is an oil film layer, the aforementioned adhesive layer 2 helps prevent the oil film from detaching). Furthermore, the combination of the fluororubber substrate layer 1, adhesive layer 2, and color-changing layer 3, with the fluororubber substrate layer facing away from the surface of the color-changing layer 3 in contact with the human body, allows the high elasticity and skin-friendliness of the fluororubber substrate layer to fit snugly against the wrist, making it suitable for long-term wear. Additionally, the low density of fluororubber makes the fluororubber substrate layer 1 lighter, and the color-changing layer 3 and adhesive layer 2 are also lighter, avoiding the heaviness of traditional metal or ceramic watchbands. Finally, the watch strap includes a fluororubber substrate layer 1. Fluororubber is resistant to high temperatures, chemical corrosion (oil, acid, solvent), and aging, making it suitable for extreme environments (such as outdoor and industrial scenarios) and giving the watch strap a long lifespan.

[0025] In some embodiments, the adhesive layer 2 is made of epoxy resin.

[0026] As described above, the adhesive layer 2 is made of epoxy resin. Combined with the aforementioned fluororubber substrate layer 1 and the color-changing layer 3 located on opposite sides of the adhesive layer 2, the epoxy resin groups are chemically bonded to the fluororubber, and through physical adsorption or chemical cross-linking with the color-changing layer 3, the adhesion or bonding strength between the layers can be improved, thereby helping to prevent the color-changing layer 3 from detaching. Furthermore, epoxy resin has good resistance to acidic and alkaline environments and is not easily corroded.

[0027] See Figure 3 and Figure 4 Along the thickness direction of the watch strap (the thickness direction is in) Figure 3 and Figure 4 (Represented by arrow R in the image), the thickness of the bite-resistant layer 2 is d, 3μm≤d≤10μm, for example, 3μm, 3.5μm, 3.7μm, 4μm, 4.3μm, 4.6μm, 5μm, 5.3μm, 5.5μm, 5.7μm, 6μm, 6.2μm, 6.5μm, 6.8μm, 7μm, 7.2μm, 7.5μm, 7.8μm, 8μm, 8.3μm, 8.5μm, 8.8μm, 9μm, 9.5μm, or 10μm. When there are multiple layers of the bite-resistant layer 2, the thickness of each layer can be equal or unequal. The above range is a preferred range. Those skilled in the art can understand that the thickness of the adhesive layer 2 may be within the above range if the material of the adhesive layer 2 is not epoxy resin, or the thickness of the adhesive layer 2 may not be within the above range if the material of the adhesive layer 2 is epoxy resin.

[0028] As described above, since 3μm≤d≤10μm, the color-changing layer 3 is less likely to fall off and the watch strap has a better feel. This is because if d is small, the adhesive layer 2 is thin, which is not conducive to preventing the color-changing layer 3 from falling off from the fluororubber substrate layer 1. On the other hand, if d is large, the adhesive layer 2 is too thick, and consumers can easily touch the adhesive layer 2, resulting in a poor feel for the watch strap.

[0029] See Figure 3 and Figure 4 The watch strap includes a fixing layer 4, and along the thickness direction of the watch strap, the fixing layer 4 and the adhesive layer 2 are located on opposite sides of the color-changing layer 3.

[0030] As described above, by setting a fixing layer 4, which covers the color-changing layer 3, the color-changing layer 3 is protected, which helps to prevent the color-changing layer 3 from being scratched or worn away.

[0031] Based on the function of the fixing layer 4, the material of the fixing layer 4 is not limited. For example, the material of the fixing layer 4 is latex paint.

[0032] In some embodiments, the thickness of the fixing layer 4 along the thickness direction of the watch strap is f, where 5μm≤f≤15μm; for example, 5μm, 5.3μm, 5.8μm, 6μm, 6.5μm, 6.8μm, 7μm, 7.3μm, 7.5μm, 7.8μm, 8μm, 8.5μm, 8.8μm, 9μm, 9.5μm, 9.8μm, 10μm, 10.5μm, 10.8μm, 11μm, 11.3μm, 11.8μm, 12μm, 12.2μm, 12.5μm, 12.8μm, 13μm, 13.2μm, 13.5μm, 13.8μm, 14μm, 14.3μm, 14.6μm, 14.8μm, or 15μm. When there are multiple layers of the fixing layer 4, the thickness of the fixing layers 4 may be equal or unequal.

[0033] As described above, since 5μm≤f≤15μm, it helps to better prevent the color-changing layer 3 from being scratched or worn away, and the watch strap has a better feel. This is because if the fixing layer 4 is too thin, it is easily worn away or scratched due to insufficient thickness, resulting in the color-changing layer 3 being worn away or scratched, and the color-changing effect of the watch strap being poor. If the fixing layer 4 is too thick, the consumer can touch it, and the feel of the watch strap is not good. Although the material of the fixing layer 4 is listed above as soft rubber paint, those skilled in the art will understand that when the material of the fixing layer 4 is not soft rubber paint, the thickness of the fixing layer 4 can also be within the above range. The above range of the fixing layer 4 thickness is a preferred range, and the thickness of the fixing layer 4 can also be other ranges.

[0034] See Figure 3 The number of the adhesive layers 2 is equal to the number of the fixing layers 4; the adhesive layers 2, color-changing layers 3, and fixing layers 4 are stacked sequentially in the direction away from the fluororubber substrate layer 1. See also Figure 4 The number of fixing layers 4 is not equal to the number of adhesive layers 2, for example, Figure 4 The diagram shows that the fixing layer 4 has two layers, the color-changing layer 3 has three layers, and the adhesive layer 2 also has three layers.

[0035] As described above, since both the fixing layer 4 and the color-changing layer 3 have multiple layers, the fixing layer 4 not only prevents the color-changing layer 3 from being scratched or worn away, but also reduces the risk of color mixing in the oil film when the color-changing layer is composed of an oil film. Because the layers are stacked sequentially in the order of the adhesive layer 2, the color-changing layer 3, and the fixing layer 4, away from the fluororubber substrate layer 1, each color-changing layer 3 is protected by the fixing layer 4, thereby increasing the watch strap's refinement and durability. If the requirements for refinement and durability are not particularly high, the number of fixing layers 4 can be reduced.

[0036] When the color-changing layer 3 is a photochromic layer (e.g., color change caused by ultraviolet light): all color-changing layers change color when the ultraviolet light intensity reaches a preset intensity. Ultraviolet light intensity is represented by 0 to 15. For example, if the preset intensity is 5, when the ultraviolet light intensity is equal to or greater than 5, Figure 2 Both color-changing layers 3 shown (distinguished by first color-changing layer 31 and second color-changing layer 32 for ease of description) change color. Figure 2 The diagram shows that the first color-changing layer 3 (also known as the first color-changing layer 31) has nine patterns (three on the left strap 11 and six on the right strap 12); the second color-changing layer 3 (also known as the second color-changing layer 32) has five patterns (two on the left strap 11 and three on the right strap 12). When the intensity of ultraviolet light is below 5 (e.g., 4 or 0), the color-changing layer 3 returns to its original color.

[0037] Alternatively, when the intensity of ultraviolet light reaches the intensity of the corresponding color-changing layer 3, the corresponding color-changing layer 3 changes color. Taking a watch band with three color-changing layers 3 as an example, the following explanation is provided: For ease of description, the three color-changing layers 3 are distinguished as the first color-changing layer 31, the second color-changing layer 32, and the third color-changing layer. It is assumed that the ultraviolet light intensity corresponding to the first color-changing layer 31 is 5, the ultraviolet light intensity corresponding to the second color-changing layer 32 is 8, and the ultraviolet light intensity corresponding to the third color-changing layer is 12. The color change of the watch band is as follows:

[0038] a) When the intensity of ultraviolet light is 6 (greater than or equal to 5 and less than 8), only the first color-changing layer 31 changes color;

[0039] b) When the intensity of ultraviolet light is 9 (greater than or equal to 8 and less than 12), both the first color-changing layer 31 and the second color-changing layer 32 change color.

[0040] c) When the intensity of ultraviolet light is 13 (greater than or equal to 12), the first color-changing layer 31, the second color-changing layer 32 and the third color-changing layer all change color.

[0041] As described above, when the intensity of ultraviolet light reaches a preset level, all color-changing layers 3 change color, making the watchband easy to manufacture. When the intensity of ultraviolet light reaches the intensity of the corresponding color-changing layer, the corresponding color-changing layer 3 changes color. In this way, the watchband can display different colors according to different ultraviolet light intensities, and there are multiple colors available, enhancing its fun and fashion sense.

[0042] See Figure 3 and Figure 4Along the thickness direction of the watch strap, the thickness of the color-changing layer 3 is m, 10μm ≤ m ≤ 15μm, for example, 10μm, 10.3μm, 10.5μm, 10.7μm, 11μm, 11.2μm, 11.5μm, 11.8μm, 12μm, 12.3μm, 12.5μm, 12.8μm, 13μm, 13.2μm, 13.5μm, 13.8μm, 14μm, 14.3μm, 14.5μm, 14.8μm, or 15μm. When there are multiple layers of the color-changing layer 3, the thickness of the color-changing layer 3 can be equal or unequal.

[0043] As described above, since 10μm≤m≤15μm, the watch strap will not have a good color-changing effect due to a pale color, nor will the color development be uneven. This is because if the thickness of the color-changing layer 3 is too thin, the oil film component of the color-changing layer 3 will be less, resulting in a pale color. If the thickness of the color-changing layer 3 is too thick, the oil film is prone to build up, making the oil film uneven. Thus, the color development of the color-changing layer 3 is uneven, leading to uneven color development of the watch strap.

[0044] Based on the function of the color-changing layer 3, the material of the color-changing layer 3 is not limited. For example, the material of the color-changing layer 3 is an organic photochromic oil film. Organic photochromic oil films include, for example, spirooxazine-based inks, spiropyran-based oil films, or diarylethene-based oil films.

[0045] As described above, using an organic photochromic oil film facilitates uniform coating and simplifies the process.

[0046] In some embodiments, the color-changing layer 3 is provided with special symbols, text, numbers, textures or patterns.

[0047] As described above, the color-changing layer 3 can be decorated with special symbols, text, numbers, textures, or patterns. The overall appearance of the color-changing layer 3 is more diverse, more interesting, and better meets the needs of consumers.

[0048] The following, combined Figures 1 to 3 The manufacturing method of the watch strap, including a fluororubber substrate layer 1, an adhesive layer 2, a color-changing layer 3, and a fixing layer 4, is described below:

[0049] 1) Place the cleaned fluororubber substrate layer 1 (the manufacturing method of fluororubber substrate layer 1 is as described above) into the conforming jig and print the first layer of adhesive layer 2.

[0050] 2) Place the product from step 1 into an oven and dry for 10 minutes;

[0051] 3.) Print color-changing ink (i.e., the first color-changing layer 3, which can be considered as) on the first adhesive layer 2. Figure 2The first color-changing layer 31 shown;

[0052] 4) Place the product from step 3 into an oven and dry for 10 minutes;

[0053] 5) Continue printing the first fixing layer 4 on the color-changing layer 3 of the product in step 4;

[0054] 6) Place the product from step 5 into an oven and dry for 10 minutes;

[0055] 7) Continue printing the second layer of adhesive layer 2;

[0056] 8) Place in an oven and dry for 10 minutes;

[0057] 9) Continue printing the product from step 8 with a second layer of color-changing ink (i.e., the second color-changing layer 3, which can be considered as...). Figure 2 The second color-changing layer 32);

[0058] 10) Place in an oven and dry for 10 minutes;

[0059] 11) Print the second fixing layer 4 on the product from step 10;

[0060] 12) Place in an oven and dry for 10 minutes;

[0061] 13) Print the third adhesive layer 2 on the second fixing layer 4;

[0062] 14) Place in an oven and dry for 10 minutes;

[0063] 15) Continue printing the third color-changing oil film on the third adhesive layer 2 to form the third color-changing layer 3;

[0064] 16) Place in an oven and dry for 10 minutes;

[0065] 17) Continue printing the third fixing layer 4;

[0066] 18) Place in an oven and dry for 10 minutes;

[0067] 19) Place the entire pair of watch straps into the fixture, spray the surface with a tactile ink, and dry.

[0068] 20) Inspect the appearance and assemble the metal parts.

[0069] On the other hand, this application discloses a wearable device. The wearable device includes any of the aforementioned watch straps. The wearable device includes watches, bracelets, etc.

[0070] It should be noted that the technical solutions or features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the precise structures described in the above embodiments and shown in the accompanying drawings; all modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A watchband, characterized by, The watch strap includes a fluororubber substrate layer, a bonding agent layer, and a color-changing layer; along the thickness direction of the watch strap, the fluororubber substrate layer and the color-changing layer are located on opposite sides of the bonding agent layer.

2. The watchband of claim 1, wherein, The adhesive layer is made of epoxy resin, and / or, along the thickness direction of the strap, the thickness of the adhesive layer is d, 3μm≤d≤10μm.

3. The watchband of claim 1, wherein, The color-changing layer is composed of an oil film and can be a pressure-sensitive color-changing layer, a photosensitive color-changing layer, a thermosensitive color-changing layer, or a water-sensitive color-changing layer.

4. The watchband of claim 1, wherein, The watch strap includes a fixing layer, and along the thickness direction of the watch strap, the fixing layer and the adhesive layer are located on opposite sides of the color-changing layer.

5. The watchband of claim 4, wherein, Along the thickness direction of the watch strap, the thickness of the fixing layer is f, 5μm≤f≤15μm; and / or, the material of the fixing layer is latex paint.

6. The watchband of claim 4, wherein, The number of the adhesive layers is equal to the number of the fixing layers; the adhesive layers, the color-changing layers, and the fixing layers are stacked sequentially in the direction away from the fluororubber substrate. Alternatively, the number of the fixing layers may differ from the number of the adhesive layers.

7. The watchband of claim 6, wherein, The color-changing layer is a photochromic layer; when the intensity of ultraviolet light reaches a preset intensity, all color-changing layers change color; Alternatively, when the intensity of ultraviolet light reaches the intensity of light on the corresponding color-changing layer, the corresponding color-changing layer changes color.

8. The watchband of claim 1, wherein, Along the thickness direction of the watch strap, the thickness of the color-changing layer is m, 10μm≤m≤15μm; And / or, the material of the color-changing layer is an organic photochromic oil film.

9. The watchband of claim 1, wherein, The color-changing layer is provided with special symbols, text, numbers, textures or patterns.

10. A wearable device, comprising: The wearable device includes the watch strap as described in any one of claims 1 to 9.

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