TPU watchband structure

Abstract

The utility model discloses a TPU (thermoplastic polyurethane) watchband structure which comprises a watchband body, the watchband body is sequentially compounded into a substrate layer, a reinforcing layer, a printing layer and a protective layer from inside to outside in a layered manner, the substrate layer adopts a thermoplastic elastomer, the thermoplastic elastomer comprises TPE (thermoplastic elastomer), TPR (thermoplastic rubber), TPU, TPO (thermoplastic polyolefin) or TPV (thermoplastic vulcanizate), and the reinforcing layer is at least one or more of a carbon fiber layer, a glass fiber layer or a polyvinyl chloride fiber layer; the printing layer is arranged on the outer surface of the reinforcing layer, and the protective layer covers the outermost layer of the watchband body. The base layer, the reinforcing layer, the printing layer and the protective layer are sequentially arranged on the multi-layer composite structure from inside to outside, the base layer is made of soft thermoplastic elastomer and is comfortable and light to wear, the reinforcing layer is used for improving the stretching resistance and supporting and shaping, and the printing layer provides colorful patterns or character marks. And the protective layer is coated outside to achieve the effects of wear resistance, scratch resistance and non-sticking to the hand, and the whole structure has multiple functions, ventilation and perspiration, and is good in use effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of wearable device accessories, and in particular relates to a TPU watchband structure. Background Art

[0002] As the most commonly used portable timekeeping tool, watches started out as pocket watches that were simply strapped to a leather belt and worn directly on the wrist. After years of development, a variety of straps made of different materials have been designed and produced, such as metal, ceramic, leather, fabric, and rubber, etc. Different materials have their own advantages and disadvantages. Different choices of straps can be made according to different usage environments and target audiences. Watches have also expanded from traditional mechanical watches, quartz watches, and electronic watches to today's common smart watches. Their functions and application scenarios are more extensive, and their audiences are larger. Therefore, the overall requirements for watches have also increased accordingly.

[0003] As consumers, when buying smart watches, in addition to paying attention to the functionality of the product, wearing comfort, product durability and fashionable design are also important factors that determine consumer choices, and the wearing experience, appearance and durability of the product are inseparable from the choice of materials. As the main structural component of a smart watch, the strap is in direct contact with the wearer's skin. It must ensure that it is comfortable, safe and beautiful to wear, while also being durable. Straps made of ordinary PVC materials have poor air permeability, tend to harden at low temperatures, and in severe cases will crack. Moreover, PVC elastomer products contain chlorine, which is prone to produce harmful substances after aging, and may cause allergic reactions when worn. Therefore, it is difficult for a strap made of a single material to meet the above multiple requirements at the same time. Watch straps with simple structures and single functions urgently need to be improved and optimized. Utility Model Content

[0004] The purpose of the utility model is to provide a TPU watchband structure in response to the deficiencies of the prior art. The structure is soft, elastic, and lightweight, can be bent and twisted arbitrarily, and is strong and durable. The surface has rich colors and various patterns, fits comfortably against the skin, and is breathable, perspiration-wicking, and non-sticky.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A TPU watchband structure comprises a watchband body, wherein the watchband body is layered and compounded in sequence from inside to outside into a base layer, a reinforcement layer, a printing layer and a protective layer, wherein the base layer adopts a thermoplastic elastomer, and the thermoplastic elastomer comprises a styrene-based thermoplastic elastomer (TPE), a thermoplastic rubber (TPR), a polyurethane elastomer (TPU), an olefin elastomer (TPO) or a thermoplastic dynamically vulcanized rubber (TPV), and the reinforcement layer is at least one or more of a carbon fiber layer, a glass fiber layer or a polyvinyl chloride fiber layer; the printing layer is arranged on the outer surface of the reinforcement layer, and the protective layer is coated on the outermost layer of the watchband body.

[0007] Preferably, the base layer is made of ultra-soft modified TPU by injection molding, and the hardness of the ultra-soft modified TPU is 30-60A. The reinforcement layer is also coated on the outside of the base layer by injection molding.

[0008] Preferably, the printing layer is provided on the outer surface of the reinforcement layer by silk screen printing, pad printing or UV printing.

[0009] Preferably, the protective layer is a film layer that covers and protects the printed layer on the reinforcement layer, and the film layer is a polyethylene film layer, a polypropylene film layer or a polyvinyl chloride film layer.

[0010] Preferably, the strap body comprises an upper strap and a lower strap, a dial is connected between the upper strap and the lower strap, both the upper strap and the lower strap are provided with ventilation holes evenly arranged along the length direction, a buckle is provided at the front end of the upper strap, the lower strap is inserted into the buckle, and the buckle is buckled with the ventilation holes.

[0011] Preferably, the ventilation holes are double-row ventilation holes, and the buckle is a double-needle buckle corresponding to the double-row ventilation holes.

[0012] Preferably, both the upper strap and the lower strap are provided with an arched transition step at the connection end connected to the dial.

[0013] Preferably, the strap body is an integrally formed integral strap, which is divided into an upper part and a lower part, and an engaging through hole for installing a dial is provided between the upper part and the lower part, and a card slot is provided inside the engaging through hole.

[0014] Preferably, the upper part is provided with a locking piece, the lower part is provided with a limiting ring, the upper part and the lower part are both provided with insertion holes evenly arranged along the length direction, the upper part passes through the limiting ring and fixes the locking piece in the insertion hole.

[0015] Preferably, the interlocking through hole is in the shape of an elongated strip or a circle.

[0016] Compared with the prior art, the beneficial effect of the utility model is that the utility model provides a TPU watchband structure, which is arranged in sequence from the inside to the outside through a multi-layer composite structure. The base layer is made of a soft thermoplastic elastomer, which is comfortable and light to wear. The reinforcement layer increases its tensile strength and serves as a support for shaping. The printed layer provides colorful patterns or text logos, and is then covered with a protective layer to play a role in wear resistance, scratch resistance and non-stickiness. The overall structure has diverse functions and is breathable and sweat-wicking, and has a good use effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the layered structure of the utility model.

[0018] Figure 2 It is a structural schematic diagram of embodiment 1 of the utility model.

[0019] Figure 3 Another structural diagram of embodiment 1 of the present utility model

[0020] Figure 4 It is a structural schematic diagram of embodiment 2 of the present utility model.

[0021] Figure 5 It is a structural schematic diagram of embodiment 3 of the present utility model.

[0022] Reference numerals:

[0023] 1. strap body, 101. base layer, 102. reinforcement layer, 103. printing layer, 104. protective layer;

[0024] 11. upper strap, 111. buckle, 12. lower strap, 13. vent hole, 14. arched transition step;

[0025] 15. upper part, 151. engaging member, 16. lower part, 161. limiting ring, 17. engaging through hole, 171. engaging groove, 18. plug hole;

[0026] 2. Dial. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0028] like Figure 1As shown, a TPU watch strap structure includes a watch strap body 1, which is layered and compounded from the inside to the outside into a base layer 101, a reinforcement layer 102, a printing layer 103 and a protective layer 104. The base layer 101 adopts a thermoplastic elastomer, which thermoplastic elastomer includes styrene thermoplastic elastomer (TPE), thermoplastic rubber (TPR), polyurethane elastomer (TPU), olefin elastomer (TPO) or thermoplastic dynamic vulcanized rubber (TPV). The reinforcement layer 102 is at least one or more of a carbon fiber layer, a glass fiber layer or a polyvinyl chloride fiber layer; the printing layer 103 is arranged on the outer surface of the reinforcement layer 102, and the protective layer 104 is coated on the outermost layer of the watch strap body 1.

[0029] Thermoplastic elastomer is a new type of polymer material between rubber and resin. It can not only replace part of rubber, but also modify plastic. It has the characteristics of high elasticity and permanent compression deformation of rubber, as well as the simple processing characteristics of plastic. It is an environmentally friendly and low-carbon material. The base layer 101 of the strap body 1 can achieve excellent performance regardless of whether it is made of TPE, TPR, TPU, TPO or TPV. After the base layer 101 is obtained by injection molding, the surface of the base layer 101 can be covered with a reinforcing layer 102 by secondary injection molding to further optimize the base layer 101. The reinforcing layer 102 is made of any one of a carbon fiber layer, a glass fiber layer or a polyvinyl chloride fiber layer. On one side of the outer surface of the reinforcing layer 102, the required pattern or character logo can be printed on the surface according to production requirements, which can increase the color richness and manufacturing style of the strap body 1 and meet the purchasing needs of various consumers. Finally, a coating protection layer 104 is applied outside the prepared printing layer 103 to make the printing layer 103 and the reinforcement layer 102 more wear-resistant and strong, and comfortable, dry and non-sticky when in direct contact with the skin.

[0030] Furthermore, the base layer 101 is made by injection molding of ultra-soft modified TPU, the hardness of which is 30-60A, and the reinforcing layer 102 is also coated on the outside of the base layer 101 by injection molding. The ultra-soft modified TPU used here has the advantages of strong elasticity, low hardness, outstanding processing performance, and excellent wear resistance. The ultra-soft modified TPU is mixed with SBS, TPU, plasticizer, maleic anhydride and other materials in a certain proportion, added into a high-speed mixer and fully mixed, and then plasticized by a twin-screw extruder at a specific plasticizing temperature, and the desired ultra-soft modified TPU is obtained by underwater pelletizing, and then the base layer 101 is obtained by this.

[0031] Furthermore, the printing layer 103 is provided on the outer surface of the reinforcing layer 102 by silk screen printing, pad printing or UV printing. Specifically, on the outward side of the strap after it is worn in a ring shape, a corresponding pattern or text or other required logo is printed according to production requirements, and printing can be performed by silk screen printing, pad printing or UV printing.

[0032] Furthermore, the protective layer 104 is a film layer that covers and protects the printed layer 103 on the reinforcing layer 102, and the film layer is a polyethylene film layer, a polypropylene film layer, or a polyvinyl chloride film layer. By adding the film layer, the surface of the strap body 1 can be made smoother, and it will not produce a sticky feeling after sweating, and it feels comfortable to wear. The protective layer 104 can also protect the printed layer 103 from deformation or loss due to daily use such as bending and abrasion.

[0033] Embodiment 1:

[0034] like Figure 2-3 As shown, a TPU watchband structure, wherein the watchband body 1 comprises an upper watchband 11 and a lower watchband 12, a watch dial 2 is connected between the upper watchband 11 and the lower watchband 12, and the connecting ends of the upper watchband 11 and the lower watchband 12 are fixed to the watch lugs of the watch dial 2 through spring ears. The upper watchband 11 and the lower watchband 12 are both provided with vents 13 evenly arranged along the length direction, through which the sweat generated on the skin or the moisture in contact with the watchband in daily life can be discharged, thereby achieving good ventilation function, and at the same time reducing the weight of the watchband itself, making it lighter.

[0035] Furthermore, a buckle 111 is provided at the front end of the upper strap 11, and the lower strap 12 is inserted into the buckle 111, and the buckle 111 is buckled with the vent 13. In this embodiment, the vent 13 is a double-row vent 13, and the buckle 111 used is a double-needle buckle corresponding to the double-row vent 13. The double needles of the buckle are turned up, and after the dial 2 is attached to the wrist, the end of the lower strap 12 passes through the buckle 111, and after adjusting to a suitable position, the turned-up double needles are inserted into the double-row vent 13.

[0036] Furthermore, both the upper strap 11 and the lower strap 12 are provided with an arched transition step 14 at the connection end connected to the dial 2. Because the thickness of the dial 2 is greater than the thickness of the strap body 1, the arched transition step 14 is specially designed to make a proper transition between the connection ends of the upper strap 11 and the lower strap 12, so that the connection between the strap and the dial 2 is smoother. When worn on the wrist, the dial 2 has no obvious protrusion from the strap body 1, and the use effect is more comfortable.

[0037] Embodiment 2:

[0038] like Figure 4As shown, a TPU watchband structure, wherein the watchband body 1 is an integral watchband formed in one piece, and is divided into an upper part 15 and a lower part 16. An interlocking through hole 17 for mounting the dial 2 is provided between the upper part 15 and the lower part 16, and a card slot 171 is provided inside the interlocking through hole 17. The interlocking through hole 17 is in the shape of a long strip. The watchband body 1 is formed in one piece by injection molding, and is directly designed as the upper part 15, the interlocking through hole 17 and the lower part 16. The dial 2 to be used can be assembled by freely interlocking or removing from the interlocking through hole 17 of the watchband body 1. The dial 2 is provided with a protruding portion corresponding to the card slot 171 on the interlocking through hole 17, so as to securely fix the dial 2 on the watchband. Because the ultra-soft modified TPU is used as the base material, the interlocking through hole 17 has a certain softness and elasticity, and the dial 2 can be conveniently and quickly embedded or removed to charge or repair the dial 2. The dial 2 used in this embodiment is a long strip-shaped dial 2 corresponding to the engaging through hole 17 .

[0039] Furthermore, the upper part 15 is provided with a snap-fitting piece 151, and the lower part 16 is provided with a limiting ring 161. The upper part 15 and the lower part 16 are provided with jacks 18 evenly arranged along the length direction. The upper part 15 passes through the limiting ring 161 and fixes the snap-fitting piece 151 in the jack 18. The jack 18 arranged around the entire strap body 1 can also be used as a vent to discharge the sweat produced on the skin, which plays a role of rapid drying and comfort. The snap-fitting piece 151 is arranged at the front end of the upper part 15, and is provided with a protruding part protruding downwards that can be inserted into the jack 18 for fixing. Passing the upper part 15 through the limiting ring 161 can make the entire strap more stable.

[0040] Embodiment 3:

[0041] like Figure 5 As shown, a TPU watchband structure is different from Example 2 in that the embedded through hole 17 designed in this embodiment is circular. A corresponding circular dial 2 can be installed in the embedded through hole 17. The rest of the settings are the same as Example 2 and will not be repeated here.

[0042] According to the disclosure and teaching of the above description, the technicians in the field of the utility model can also change and modify the above implementation. Therefore, the utility model is not limited to the above specific implementation, and any obvious improvement, replacement or modification made by the technicians in this field on the basis of the utility model belongs to the protection scope of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of explanation and do not constitute any limitation to the utility model.

Claims

1. A TPU watchband structure, comprising a watchband body (1), characterized in that: The watchband body (1) is layered and compounded in sequence from the inside to the outside into a base layer (101), a reinforcement layer (102), a printing layer (103) and a protective layer (104); the base layer (101) is made of a thermoplastic elastomer, which includes a styrene-based thermoplastic elastomer, a thermoplastic rubber, a polyurethane-based elastomer, an olefin-based elastomer or a thermoplastic dynamically vulcanized rubber; the reinforcement layer (102) is a carbon fiber layer, a glass fiber layer or a polyvinyl chloride fiber layer; the printing layer (103) is arranged on the outer surface of the reinforcement layer (102); and the protective layer (104) is coated on the outermost layer of the watchband body (1).

2. The TPU strap structure according to claim 1, characterized in that: The base layer (101) is made by injection molding of ultra-soft modified TPU, the hardness of the ultra-soft modified TPU is 30-60A, and the reinforcement layer (102) is also coated on the outside of the base layer (101) by injection molding.

3. The TPU strap structure according to claim 1, characterized in that: The printing layer (103) is arranged on the outer surface of the reinforcing layer (102) by means of silk screen printing, pad printing or UV printing.

4. The TPU strap structure according to claim 1, characterized in that: The protective layer (104) is a film layer that covers and protects the printed layer (103) on the reinforcing layer (102), and the film layer is a polyethylene film layer, a polypropylene film layer, or a polyvinyl chloride film layer.

5. The TPU strap structure according to claim 1, characterized in that: The strap body (1) comprises an upper strap (11) and a lower strap (12), a dial (2) is connected between the upper strap (11) and the lower strap (12), the upper strap (11) and the lower strap (12) are both provided with ventilation holes (13) evenly arranged along the length direction, a buckle (111) is provided at the front end of the upper strap (11), the lower strap (12) is inserted into the buckle (111), and the buckle (111) is buckled with the ventilation holes (13).

6. The TPU strap structure according to claim 5, characterized in that: The ventilation holes (13) are double-row ventilation holes (13), and the watch buckle (111) is a double-needle buckle corresponding to the double-row ventilation holes (13).

7. The TPU strap structure according to claim 6, characterized in that: The upper strap (11) and the lower strap (12) are both provided with an arched transition step (14) at the connection end connected to the dial (2).

8. The TPU strap structure according to claim 1, characterized in that: The watchband body (1) is an integral watchband formed in one piece, and is divided into an upper part (15) and a lower part (16). An engaging through hole (17) is provided between the upper part (15) and the lower part (16), and a card slot (171) is provided inside the engaging through hole (17).

9. The TPU strap structure according to claim 8, characterized in that: The upper part (15) is provided with a locking member (151), and the lower part (16) is provided with a limiting ring (161). Both the upper part (15) and the lower part (16) are provided with insertion holes (18) evenly arranged along the length direction. The upper part (15) passes through the limiting ring (161) and fixes the locking member (151) in the insertion hole (18).

10. The TPU strap structure according to claim 9, characterized in that: The embedded through hole (17) is in the shape of an elongated strip or a circle.

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