Waistband for safety belt as well as preparation method and application of waistband

Abstract

The invention discloses a belt for a safety belt and a preparation method and application thereof, and relates to the technical field of safety belts, the preparation method comprises the following steps: a first yarn loop assembly and a second yarn loop assembly are pasted on a first temporary carrier and are arranged along a preset direction, and one ends of the first yarn loop assembly and the second yarn loop assembly are overlapped and intersected; covering a connecting sheet in an overlapping intersection area of the two parts, and sewing by using a first sewing line to form a pressure dispersion structure; overturning and transferring the pressure dispersion structure to a second temporary carrier; the pressure dispersion structure is attached to the first fabric piece in a hot-pressing mode; and covering the pressure dispersion structure with a second fabric piece, and fixedly connecting the first fabric piece and the second fabric piece to obtain the waistband for the safety belt. According to the waistband for the safety belt, the two yarn loop assemblies are arranged in the waistband for the safety belt in a hot-press fit mode, pressure can be quickly and evenly dispersed to the whole waist and pelvis area, the wearing comfort of a climber is effectively improved, and meanwhile the risk that the waist is damaged due to pressure is reduced.

Description

Technical Field

[0001] This invention relates to the field of seat belt technology, specifically to a seat belt lap belt, its preparation method, and its application. Background Technology

[0002] In rock climbing, the harness is the core equipment ensuring the climber's safety, and the waist belt, as the core load-bearing and wearing component of the harness, directly affects the climber's safety and comfort. Rock climbing scenarios are complex. Whether climbing natural or artificial rock walls, climbers frequently need to perform actions such as climbing, pausing, and adjusting their body position. They may also face the impact of accidental falls. The waist, as a core load-bearing area, bears the tension from the rope, the climber's own weight, and the instantaneous impact of a fall. Therefore, the waist belt must simultaneously meet core requirements such as load-bearing strength and pressure distribution capabilities.

[0003] Most existing climbing harnesses use high-density webbing structures and adjust the waist size using buckles. Their design focuses primarily on increasing load-bearing strength, with limited optimization of pressure distribution. In practical applications, these harnesses have significant shortcomings: when climbers are climbing or hanging for extended periods, pressure tends to concentrate in localized areas such as the sides and back of the waist, leading to poor local blood circulation and causing discomfort such as soreness and numbness in the lower back. In severe cases, this can affect the climber's flexibility and endurance. In the event of a sudden fall, the instantaneous impact force cannot be quickly and evenly transmitted to the entire waist and pelvic area. The concentrated pressure not only exacerbates discomfort but may also increase the risk of lower back injury due to localized overload. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art. This invention provides a safety belt, its preparation method and application. By heat-pressing and bonding two yarn loop components inside the safety belt, pressure can be quickly and evenly distributed to the entire waist and pelvic area, effectively improving the comfort of rock climbers and reducing the risk of waist pressure injury.

[0005] This invention provides a method for preparing a seat belt, comprising the following steps: S1. Attach a first yarn loop assembly and a second yarn loop assembly to a first temporary carrier. The first yarn loop assembly and the second yarn loop assembly are arranged along a preset direction, and one end of the first yarn loop assembly and one end of the second yarn loop assembly overlap and intersect. The first yarn loop assembly comprises, from the inside out, a plurality of first loops sequentially pasted onto the first temporary carrier, the first loops being made of first fibers; the second yarn loop assembly comprises, from the inside out, a plurality of second loops sequentially pasted onto the first temporary carrier, the second loops being made of second fibers. S2. Cover the overlapping and intersecting area of ​​the first yarn loop assembly and the second yarn loop assembly with a connecting piece, and sew the connecting piece, the overlapping and intersecting area and the first temporary carrier together with a first suture thread to obtain the first object to be transferred; The first yarn loop assembly, the second yarn loop assembly, and the connecting piece form a pressure dispersion structure under the connection of the first suture thread; S3. Flip over and transfer the first yarn loop assembly, the second yarn loop assembly, and the connecting piece on the first object to be transferred to the second temporary carrier to obtain the second object to be transferred. S4. The first yarn loop assembly, the second yarn loop assembly, and the connecting piece on the second body to be transferred are hot-pressed onto the first fabric sheet to obtain an integrated body; S5. Cover the first loop assembly, the second loop assembly and the connecting piece on the integrated body with the second fabric piece, and fix the first fabric piece and the second fabric piece to obtain a seat belt.

[0006] Specifically, the first temporary carrier is a backing paper or non-woven fabric, and the second temporary carrier is a backing paper or non-woven fabric; and / or The first fabric sheet is made of one or more of nylon, polyester, polypropylene, and ethylene, and the second fabric sheet is made of one or more of nylon, polyester, polypropylene, and ethylene.

[0007] Specifically, both the first fiber and the second fiber are ultra-high molecular weight polyethylene fibers.

[0008] Specifically, after step S5, the following steps are also included: A first waist belt adjusting webbing and a second waist belt adjusting webbing are fixedly provided at both ends of the body of the seat belt, and the first waist belt adjusting webbing and the second waist belt adjusting webbing are connected by a waist belt adjusting buckle; One end of the first waist belt adjusting webbing, which is fixedly connected to the waist belt of the seat belt, extends into the interior of the waist belt of the seat belt and is fixedly connected to one end of the first loop assembly; the other end of the second waist belt adjusting webbing, which is fixedly connected to the waist belt of the seat belt, extends into the interior of the waist belt of the seat belt and is fixedly connected to one end of the second loop assembly.

[0009] The present invention also provides a seat belt lap belt, which is made by the method for preparing a seat belt lap belt. The seat belt lap belt includes a first fabric piece, a second fabric piece, a first loop assembly, a second loop assembly, and a connecting piece. The first loop assembly, the second loop assembly, and the connecting piece are all sandwiched between the first fabric piece and the second fabric piece, and the first fabric piece and the second fabric piece are fixedly connected. The first yarn loop assembly and the second yarn loop assembly are arranged along the length direction of the first fabric piece. One end of the first yarn loop assembly and one end of the second yarn loop assembly overlap and intersect. The overlapping and intersecting area between the first yarn loop assembly and the second yarn loop assembly is fixedly set on the connecting piece based on the first stitch line. The first yarn loop assembly includes, from the inside out, a plurality of first loops sequentially heat-pressed and bonded onto the first fabric sheet, the first loops being made of first fibers; the second yarn loop assembly includes, from the inside out, a plurality of second loops sequentially heat-pressed and bonded onto the first fabric sheet, the second loops being made of second fibers.

[0010] Specifically, there is a first interval between two adjacent first loops in the first loop assembly, and there is a second interval between two adjacent second loops in the second loop assembly.

[0011] Specifically, the first loop body in the first yarn loop assembly is divided into several first closely packed loop groups, and there is a third interval between two adjacent first closely packed loop groups. Each first closely packed loop group includes 2 to 8 first loop bodies arranged closely side by side. The second yarn loop assembly comprises multiple second loop bodies divided into several second closely spaced loop groups, with a fourth interval between two adjacent second closely spaced loop groups, and each second closely spaced loop group includes 2 to 8 second loop bodies arranged closely side by side.

[0012] Specifically, the first yarn loop assembly includes 10 to 50 first loop bodies, and the cross-section of any first loop body includes 3,000 to 175,000 first fibers, and the diameter of any first fiber ranges from 10 to 30 μm; The second yarn loop assembly includes 10 to 50 second loop bodies, each of which has 3,000 to 175,000 second fibers in its cross-section, and each of the second fibers has a diameter ranging from 10 to 30 μm.

[0013] Specifically, the length of the first fabric piece is L. 片 The first loop assembly extends L1 on the first fabric piece, and the second loop assembly extends L2 on the first fabric piece. 片 The constraint relationship between L1 and L2 is as follows: 0.8L 片 ≤L1+L2≤L 片 L1 = L2.

[0014] The present invention also provides the application of the aforementioned safety belt in rock climbing safety belts.

[0015] Compared with the prior art, the beneficial effects of the present invention are: The present invention first attaches a first yarn loop assembly (multiple nested first loops arranged from the inside out) and a second yarn loop assembly (multiple nested second loops arranged from the inside out) to a first temporary carrier. These two yarn loop assemblies are arranged along a predetermined direction (the length direction of the first fabric piece), with one end overlapping and intersecting. The overlapping and intersecting area is fixed to a connecting piece based on a first stitch, thereby constructing a continuous pressure-dispersing structure. Next, this pressure-dispersing structure is flipped over and transferred to a second temporary carrier, exposing the side of the overlapping and intersecting area of ​​the first and second yarn loop assemblies away from the connecting piece, so that this overlapping and intersecting area can be directly bonded to the first fabric piece later. Then, the flipped pressure-dispersing structure is heat-pressed onto the first fabric piece, with the first and second yarn loop assemblies completely bonded to the first fabric piece. The first fabric piece and the connecting piece sandwich the overlapping and intersecting area of ​​the first and second yarn loop assemblies in the middle. Finally, the entire pressure-dispersing structure is covered with a second fabric piece, clamping and fixing the pressure-dispersing structure between the first and second fabric pieces to form a seatbelt waistband.

[0016] This safety belt uses an internal pressure-dispersing structure that can quickly and evenly distribute pressure to the entire waist and pelvic area, eliminating local pressure points. This effectively improves the discomfort of pressure during long climbs and suspensions, greatly enhancing the comfort of climbers. It can also quickly and evenly disperse instantaneous impact force, effectively reducing the risk of damage to the soft tissues of the waist due to local overload, and truly ensuring the safety of the waist during sports activities. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic flowchart of the method for preparing the seat belt in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of attaching the first yarn loop assembly and the second yarn loop assembly to the first temporary carrier in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first object to be transferred in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second object to be transferred in an embodiment of the present invention; Figure 5This is a schematic diagram of the structure of the integrated body in an embodiment of the present invention; Figure 6 This is a schematic diagram of the first structure of the seat belt in an embodiment of the present invention; Figure 7 This is a schematic diagram of the second structure of the seat belt in an embodiment of the present invention; Figure 8 This is a schematic diagram of the waist ring structure in an embodiment of the present invention; Figure 9 This is a first structural schematic diagram of the first yarn loop assembly, the second yarn loop assembly, and the connecting piece in an embodiment of the present invention; Figure 10 This is a second structural schematic diagram of the first yarn loop assembly, the second yarn loop assembly, and the connecting piece in an embodiment of the present invention.

[0019] In the attached figures, 10 is the first temporary carrier; 20 is the second temporary carrier; 30 is the first fabric piece; 40 is the second fabric piece; 100 is the first yarn loop assembly; 110 is the first loop body; 120 is the first interval; 130 is the first closely packed loop group; 140 is the third interval; 200 is the second yarn loop assembly; 210 is the second loop body; 220 is the second interval; 230 is the second closely packed loop group; 240 is the fourth interval; 300 is the connecting piece; 310 is the first stitching thread; 400 is the waistband adjustment assembly; 410 is the first waistband adjustment webbing; and 420 is the second waistband adjustment webbing. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] This invention provides a method for preparing a seat belt. Figure 1 A schematic flowchart of a method for preparing a seat belt lap belt according to an embodiment of the present invention is shown, including the following steps: S1. Attach a first yarn loop assembly and a second yarn loop assembly to a first temporary carrier. The first yarn loop assembly and the second yarn loop assembly are arranged along a preset direction, and one end of the first yarn loop assembly and one end of the second yarn loop assembly overlap and intersect. Figure 2 A schematic diagram of the structure of attaching the first yarn loop assembly and the second yarn loop assembly to the first temporary carrier is shown in an embodiment of the present invention.

[0022] The first yarn loop assembly 100 includes, from the inside out, a plurality of first loops 110 sequentially pasted on the first temporary carrier 10, the first loops 110 being made of first fibers; the second yarn loop assembly 200 includes, from the inside out, a plurality of second loops 210 sequentially pasted on the first temporary carrier 10, the second loops 210 being made of second fibers.

[0023] First, a first yarn loop assembly 100 (multiple nested first loops 110 arranged from the inside out) and a second yarn loop assembly 200 (multiple nested second loops 210 arranged from the inside out) are attached to the first temporary carrier 10. These two yarn loop assemblies are arranged along a predetermined direction (the length direction of the seatbelt's waistband), with one end overlapping and intersecting. This lays the foundation for the subsequent construction of the pressure dispersion structure. The first yarn loop assembly 100 and the second yarn loop assembly 200 are attached to the first temporary carrier 10 using a weak adhesive (such as acrylic pressure-sensitive adhesive, microsphere pressure-sensitive adhesive, etc.) to facilitate the subsequent removal of the first temporary carrier 10.

[0024] Specifically, positioning structures (such as holes, markers, and marker lines) can be set on the first temporary carrier 10 to facilitate the precise arrangement of each loop, which is beneficial for constructing the first yarn loop assembly 100 and the second yarn loop assembly 200 with stable shape and structure, and also has good repeatability.

[0025] Furthermore, the first temporary carrier 10 is paper or non-woven fabric, which facilitates subsequent removal.

[0026] In some specific embodiments, both the first fiber and the second fiber are ultra-high molecular weight polyethylene (UHMWPE) fibers. UHMWPE fibers are readily available and possess high specific strength and high specific modulus. Their specific strength is more than ten times that of steel wire of the same cross-section, and their specific modulus is second only to high-grade carbon fiber. They also have good wear resistance and a low coefficient of friction, effectively ensuring the working stability of the yarn loop assembly.

[0027] S2. Cover the overlapping and intersecting area of ​​the first yarn loop assembly and the second yarn loop assembly with a connecting piece, and sew the connecting piece, the overlapping and intersecting area and the first temporary carrier together with a first suture thread to obtain the first object to be transferred; Figure 3 A schematic diagram of the structure of the first object to be transferred in an embodiment of the present invention is shown.

[0028] The first loop assembly 100, the second loop assembly 200, and the connecting piece 300 form a pressure dispersion structure under the connection of the first stitch 310. This pressure dispersion structure can quickly and evenly disperse the pressure in the subsequent safety belt, avoiding the pressure concentration in a local area and the resulting feeling of pressure. It can effectively improve the discomfort of pressure during long-term climbing and hanging, greatly improve the comfort of rock climbers, and quickly and evenly disperse the instantaneous impact force, effectively reducing the risk of damage to the soft tissue of the waist due to local overload, and effectively ensuring the safety of waist protection during sports activities.

[0029] S3. Flip over and transfer the first yarn loop assembly, the second yarn loop assembly, and the connecting piece on the first object to be transferred to the second temporary carrier to obtain the second object to be transferred. Figure 4 A schematic diagram of the structure of the second object to be transferred in an embodiment of the present invention is shown.

[0030] This step involves flipping the pressure dispersion structure (first yarn loop assembly 100, second yarn loop assembly 200, and connecting piece 300) onto the second temporary carrier 20, exposing the side of the overlapping area of ​​the first yarn loop assembly 100 and the second yarn loop assembly 200 away from the connecting piece 300, so that this overlapping area can be directly bonded to the first fabric sheet 30 later. The second temporary carrier 20 is attached to the pressure dispersion structure (first yarn loop assembly 100, second yarn loop assembly 200, and connecting piece 300) with a weak adhesive (such as acrylic pressure-sensitive adhesive, microsphere pressure-sensitive adhesive, etc.), facilitating the subsequent removal of the second temporary carrier 20.

[0031] Specifically, the second temporary carrier 20 can be provided with positioning structures (such as holes, markers, marker lines, etc.) to facilitate alignment with the first temporary carrier 10 and to facilitate the precise transfer of the pressure distribution structure (first yarn loop assembly 100, second yarn loop assembly 200 and connecting piece 300) to the second temporary carrier 20.

[0032] Furthermore, the second temporary carrier 20 is paper or non-woven fabric, which facilitates subsequent removal.

[0033] S4. The first yarn loop assembly, the second yarn loop assembly, and the connecting piece on the second body to be transferred are hot-pressed onto the first fabric sheet to obtain an integrated body; Figure 5 A schematic diagram of the structure of the integrated body in an embodiment of the present invention is shown.

[0034] At this time, the first yarn loop assembly 100 and the second yarn loop assembly 200 are completely attached to the first fabric sheet 30. The first fabric sheet 30 and the connecting piece 300 sandwich the overlapping and intersecting areas of the first yarn loop assembly 100 and the second yarn loop assembly 200 in the middle, so that the pressure dispersion structure (first yarn loop assembly 100, second yarn loop assembly 200 and connecting piece 300) has good adhesion stability on the first fabric sheet 30.

[0035] Specifically, the pressure dispersion structure is hot-pressed onto the first fabric sheet 30 using a hot melt adhesive film. Hot melt adhesive films are existing materials and can be classified into types such as EVA, PES, and TPU. TPU hot melt adhesive films are preferred because they have good compatibility with fabrics.

[0036] Furthermore, the first fabric piece 30 is made of one or more of nylon, polyester, polypropylene, and ethylene, which has good mechanical strength and is wear-resistant.

[0037] S5. Cover the first loop assembly, the second loop assembly and the connecting piece on the integrated body with the second fabric piece, and fix the first fabric piece and the second fabric piece to obtain a seat belt waist belt; Figure 6 A schematic diagram of the first structure of a seat belt waistband in an embodiment of the present invention is shown.

[0038] The first fabric piece 30 and the second fabric piece 40 clamp and fix the pressure dispersion structure between them, which protects the pressure dispersion structure and prevents it from directly contacting the outside world. This effectively reduces the wear of the first yarn loop assembly 100 and the second yarn loop assembly 200, thereby effectively extending the working life of the first yarn loop assembly 100 and the second yarn loop assembly 200. At the same time, the first fabric piece 30 and the second fabric piece 40 can also play a role in dispersing pressure.

[0039] Specifically, the first fabric piece 30 and the second fabric piece 40 can be glued together or sewn together.

[0040] The second fabric sheet 40 may be bonded to the pressure dispersion structure or not; preferably, the second fabric sheet 40 is bonded to the pressure dispersion structure, which can effectively maintain the structural shape of the pressure dispersion structure and help the pressure dispersion structure to fully exert its function of dispersing pressure.

[0041] Furthermore, the material of the second fabric piece 40 is one or more of nylon, polyester, polypropylene, and ethylene, which has good mechanical strength and wear resistance.

[0042] In some specific embodiments, after step S5, the method further includes: Figure 7A schematic diagram of the second structure of a seat belt according to an embodiment of the present invention is shown. A first belt adjustment webbing 410 and a second belt adjustment webbing 420 are respectively fixedly provided at both ends of the body of the seat belt. The first belt adjustment webbing 410 and the second belt adjustment webbing 420 are connected by a belt adjustment buckle. Figure 8 The diagram shows a schematic of the waist ring in an embodiment of the present invention. The first waist belt adjusting webbing 410, the second waist belt adjusting webbing 420 and the waist belt adjusting buckle can form a waist belt adjusting component 400. The body of the safety belt can be connected to form a ring-shaped waist ring based on this waist belt adjusting component 400, and can be adapted to the human waist circumference.

[0043] For details, please refer to Figure 7 The first waist belt adjusting webbing 410, with one end fixedly connected to the seat belt waist belt, extends into the interior of the seat belt waist belt and is fixedly connected to one end of the first loop assembly 100; the second waist belt adjusting webbing 420, with one end fixedly connected to the seat belt waist belt, extends into the interior of the seat belt waist belt and is fixedly connected to one end of the second loop assembly 200. This means that the tension on the first waist belt adjusting webbing 410 can be directly transmitted to the first loop assembly 100, and the tension on the second waist belt adjusting webbing 420 can be directly transmitted to the second loop assembly 200, thereby facilitating the rapid and even distribution of pressure throughout the entire seat belt waist belt, ensuring that the seat belt waist belt does not exert localized pressure points on the human body.

[0044] The method for preparing the safety belt of the present invention, by constructing a pressure dispersion structure inside the safety belt, can quickly and evenly distribute pressure to the entire waist and pelvic area, without local pressure points. This effectively improves the discomfort of pressure during long-term climbing and hanging, greatly enhances the comfort of rock climbers, and can quickly and evenly disperse instantaneous impact force, effectively reducing the risk of damage to the soft tissue of the waist due to local overload, and effectively ensuring the safety of waist protection during sports activities.

[0045] Moreover, by “first constructing a pressure dispersion structure on the first temporary carrier 10, then flipping and transferring the pressure dispersion structure to the second temporary carrier 20, and then hot-pressing the pressure dispersion structure onto the first fabric piece 30”, a precise and stable pressure dispersion structure can be constructed inside the waist belt of the seat belt, with good repeatability and easy mass production.

[0046] The present invention also provides a lap belt for a seatbelt; please refer to [link / reference]. Figure 6The seat belt is manufactured by the method for preparing a seat belt. The seat belt includes a first fabric piece 30, a second fabric piece 40, a first loop assembly 100, a second loop assembly 200, and a connecting piece 300. The first loop assembly 100, the second loop assembly 200, and the connecting piece 300 are all sandwiched between the first fabric piece 30 and the second fabric piece 40, and the first fabric piece 30 and the second fabric piece 40 are fixedly connected. The first yarn loop assembly 100 and the second yarn loop assembly 200 are arranged along the length direction of the first fabric piece 30. One end of the first yarn loop assembly 100 and one end of the second yarn loop assembly 200 overlap and intersect, and the overlapping and intersecting area between the first yarn loop assembly 100 and the second yarn loop assembly 200 is fixedly disposed on the connecting piece 300 based on the first stitching line 310. The first yarn loop assembly 100 includes, from the inside out, a plurality of first loops 110 sequentially heat-pressed and bonded onto the first fabric sheet 30, the first loops 110 being made of first fibers; the second yarn loop assembly 200 includes, from the inside out, a plurality of second loops 210 sequentially heat-pressed and bonded onto the first fabric sheet 30, the second loops 210 being made of second fibers.

[0047] The safety belt of the present invention uses a first fabric piece 30 and a second fabric piece 40 as the main body, and sandwiches a first yarn loop assembly 100 (multiple first loops 110 arranged nested from the inside out), a second yarn loop assembly 200 (multiple second loops 210 arranged nested from the inside out), and a connecting piece 300 (fixing the overlapping area of ​​the first yarn loop assembly 100 and the second yarn loop assembly 200 based on the first stitch 310). This creates a continuous pressure dispersion structure (first yarn loop assembly 100, second yarn loop assembly 200 and connecting piece 300) inside the safety belt, which can quickly and evenly distribute pressure to the entire waist and pelvic area without local pressure points. This effectively improves the discomfort of pressure during long-term climbing and hanging, greatly enhances the comfort of rock climbers, and can quickly and evenly disperse instantaneous impact force, effectively reducing the risk of damage to the soft tissue of the waist due to local overload, and effectively ensuring the safety of waist protection during sports activities.

[0048] Optional, Figure 9 The diagram shows a first structural schematic of a first yarn loop assembly, a second yarn loop assembly, and a connecting piece in an embodiment of the present invention. There is a first interval 120 between two adjacent first loop bodies 110 in the first yarn loop assembly 100, and a second interval 220 between two adjacent second loop bodies 210 in the second yarn loop assembly 200.

[0049] Each loop assembly has a pre-installed gap between any two adjacent loops, achieving both flexible pressure distribution across the entire area and an adaptive fit for the waistband. The evenly distributed loops act as load-bearing fulcrums, allowing the load to be quickly transmitted to the entire waist contact area when the waistband is subjected to suspension tension or fall impact, preventing localized pressure concentration. Furthermore, the gaps between adjacent loops provide space for the waistband to deform under pressure, enabling it to adapt to changes in body shape and conform to the waist and abdomen curves without feeling restrictive due to a rigid structure. At the same time, the gaps create air circulation channels, alleviating stuffiness during prolonged wear and improving continuous wearing comfort.

[0050] Optional, Figure 10 The diagram illustrates a second structural schematic of a first yarn loop assembly, a second yarn loop assembly, and a connecting piece in an embodiment of the present invention. In the first yarn loop assembly 100, a plurality of first loop bodies 110 are divided into several first closely spaced loop groups 130, with a third interval 140 between adjacent first closely spaced loop groups 130. Each first closely spaced loop group 130 includes 2 to 8 closely arranged first loop bodies 110. In the second yarn loop assembly 200, a plurality of second loop bodies 210 are divided into several second closely spaced loop groups 230, with a fourth interval 240 between adjacent second closely spaced loop groups 230. Each second closely spaced loop group 230 includes 2 to 8 closely arranged second loop bodies 210.

[0051] Several loops are closely arranged in groups, with multiple groups spaced apart, allowing for a precise combination of localized flexible load-bearing reinforcement and flexible adaptation to non-load-bearing areas. The closely arranged loops within a group form flexible load-bearing units that work together to bear loads. Compared to a single loop, this structure significantly improves the load-bearing capacity of the corresponding area. When the harness is subjected to suspension tension or fall impact, the load can be quickly distributed to each loop within the group, preventing localized pressure concentration caused by overload on a single loop. Multiple load-bearing units correspond to the core stress points where the harness contacts the body, effectively buffering impacts and dispersing loads through the resilience and synergistic effect of the flexible loops. Moreover, the intervals between groups retain the harness's flexibility and deformation space, allowing it to better adapt to climbers' large-scale body position adjustments such as bending, turning, and leg lifting, without restricting limb flexibility due to the dense loops. These intervals also create airflow gaps, alleviating the stuffiness caused by prolonged wear.

[0052] It should be noted that the density of each yarn loop component at both ends (the curved area) can be different, and the specific adjustment depends on the shape of the seat belt waistband.

[0053] In some specific embodiments, the first yarn loop assembly 100 includes 10 to 50 first loop bodies 110, each of which has a cross-section containing 3,000 to 175,000 first fibers, and each first fiber has a diameter ranging from 10 to 30 μm; the second yarn loop assembly 200 includes 10 to 50 second loop bodies 210, each of which has a cross-section containing 3,000 to 175,000 second fibers, and each second fiber has a diameter ranging from 10 to 30 μm. Such a yarn loop assembly possesses good toughness and strength, can effectively distribute pressure, and is robust and durable.

[0054] In some specific embodiments, the length of the first fabric piece 30 is L. 片 The first loop assembly 100 extends L1 on the first fabric piece 30, and the second loop assembly 200 extends L2 on the first fabric piece 30. 片 The constraint relationship between L1 and L2 is: 0.8L 片 ≤L1+L2≤L 片 L1=L2. This ensures that the lap belt of the seat belt has a sufficiently long pressure-dispersing structure, so that the pressure can be quickly and evenly distributed to the entire waist and pelvic area, without any local pressure points.

[0055] The safety belt of the present invention, by constructing a continuous pressure dispersion structure (first loop assembly 100, second loop assembly 200 and connecting piece 300) inside the main body, can quickly and evenly distribute pressure to the entire waist and pelvic area, without local pressure points. It can effectively improve the discomfort of pressure during long-term climbing and hanging, greatly improve the comfort of rock climbers, and quickly and evenly disperse instantaneous impact force, effectively reducing the risk of damage to the soft tissue of the waist due to local overload, and effectively ensuring the safety of waist protection during sports.

[0056] Moreover, the loops in the yarn loop assembly have two arrangement methods. One is to arrange multiple loops in an array with a reserved gap between adjacent loops, which can achieve the dual effect of flexible pressure distribution throughout the entire area and adaptive fit of the waistband. The other is to arrange several loops closely into a group and set multiple groups with intervals, which can achieve a precise combination of flexible load-bearing reinforcement in local areas and flexible adaptation in non-stressed areas.

[0057] This invention also provides the application of the aforementioned safety belt in rock climbing safety belts, effectively improving the wearing comfort and protective safety of rock climbing safety belts. The safety belt has a specially designed pressure-dispersing structure internally—a first loop assembly 100 (multiple nested first loops 110 arranged from the inside out), a second loop assembly 200 (multiple nested second loops 210 arranged from the inside out), and a connecting piece 300 (fixing the overlapping area of ​​the first loop assembly 100 and the second loop assembly 200 based on the first stitch 310). This structure can quickly and evenly distribute pressure to the entire waist and pelvic area, eliminating localized pressure points. It effectively improves the discomfort of prolonged climbing and hanging, significantly enhancing the comfort of the climber, and quickly and evenly disperses instantaneous impact forces, effectively reducing the risk of damage to the soft tissues of the waist due to localized overload, thus ensuring the safety of the waist during exercise.

[0058] The above provides a detailed description of a seat belt, its preparation method, and its application according to embodiments of the present invention. Specific examples have been used to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for preparing a seat belt lap belt, characterized in that, Includes the following steps: S1. Attach a first yarn loop assembly and a second yarn loop assembly to a first temporary carrier. The first yarn loop assembly and the second yarn loop assembly are arranged along a preset direction, and one end of the first yarn loop assembly and one end of the second yarn loop assembly overlap and intersect. The first yarn loop assembly comprises, from the inside out, a plurality of first loops sequentially pasted onto the first temporary carrier, the first loops being made of first fibers; the second yarn loop assembly comprises, from the inside out, a plurality of second loops sequentially pasted onto the first temporary carrier, the second loops being made of second fibers. S2. Cover the overlapping and intersecting area of ​​the first yarn loop assembly and the second yarn loop assembly with a connecting piece, and sew the connecting piece, the overlapping and intersecting area and the first temporary carrier together with a first suture thread to obtain the first object to be transferred; The first yarn loop assembly, the second yarn loop assembly, and the connecting piece form a pressure dispersion structure under the connection of the first suture thread; S3. Flip over and transfer the first yarn loop assembly, the second yarn loop assembly, and the connecting piece on the first object to be transferred to the second temporary carrier to obtain the second object to be transferred. S4. The first yarn loop assembly, the second yarn loop assembly, and the connecting piece on the second body to be transferred are hot-pressed onto the first fabric sheet to obtain an integrated body; S5. Cover the first loop assembly, the second loop assembly and the connecting piece on the integrated body with the second fabric piece, and fix the first fabric piece and the second fabric piece to obtain a seat belt.

2. The method for preparing a seat belt as described in claim 1, characterized in that, The first temporary carrier is a backing paper or non-woven fabric, and the second temporary carrier is a backing paper or non-woven fabric; and / or The first fabric sheet is made of one or more of nylon, polyester, polypropylene, and ethylene, and the second fabric sheet is made of one or more of nylon, polyester, polypropylene, and ethylene.

3. The method for preparing a seat belt as described in claim 1, characterized in that, Both the first fiber and the second fiber are ultra-high molecular weight polyethylene fibers.

4. The method for preparing a seat belt as described in claim 1, characterized in that, Following step S5, the following is also included: A first waist belt adjusting webbing and a second waist belt adjusting webbing are fixedly provided at both ends of the body of the seat belt, and the first waist belt adjusting webbing and the second waist belt adjusting webbing are connected by a waist belt adjusting buckle; One end of the first waist belt adjusting webbing, which is fixedly connected to the waist belt of the seat belt, extends into the interior of the waist belt of the seat belt and is fixedly connected to one end of the first loop assembly; the other end of the second waist belt adjusting webbing, which is fixedly connected to the waist belt of the seat belt, extends into the interior of the waist belt of the seat belt and is fixedly connected to one end of the second loop assembly.

5. A lap belt for a seatbelt, characterized in that, The seat belt is made by the method of making a seat belt according to any one of claims 1 to 4. The seat belt includes a first fabric piece, a second fabric piece, a first loop assembly, a second loop assembly, and a connecting piece. The first loop assembly, the second loop assembly, and the connecting piece are all sandwiched between the first fabric piece and the second fabric piece. The first fabric piece and the second fabric piece are fixedly connected. The first yarn loop assembly and the second yarn loop assembly are arranged along the length direction of the first fabric piece. One end of the first yarn loop assembly and one end of the second yarn loop assembly overlap and intersect. The overlapping and intersecting area between the first yarn loop assembly and the second yarn loop assembly is fixedly set on the connecting piece based on the first stitch line. The first yarn loop assembly includes, from the inside out, a plurality of first loops sequentially heat-pressed and bonded onto the first fabric sheet, the first loops being made of first fibers; the second yarn loop assembly includes, from the inside out, a plurality of second loops sequentially heat-pressed and bonded onto the first fabric sheet, the second loops being made of second fibers.

6. The lap belt for a seatbelt as described in claim 5, characterized in that, There is a first interval between two adjacent first loops in the first loop assembly, and there is a second interval between two adjacent second loops in the second loop assembly.

7. The lap belt for a seatbelt as described in claim 5, characterized in that, The first yarn loop assembly comprises multiple first loop bodies divided into several first closely spaced loop groups, with a third interval between two adjacent first closely spaced loop groups, and each first closely spaced loop group includes 2 to 8 first loop bodies arranged closely side by side. The second yarn loop assembly comprises multiple second loop bodies divided into several second closely spaced loop groups, with a fourth interval between two adjacent second closely spaced loop groups, and each second closely spaced loop group includes 2 to 8 second loop bodies arranged closely side by side.

8. The lap belt for a seatbelt as described in claim 5, characterized in that, The first yarn loop assembly includes 10 to 50 first loop bodies, and the cross-section of any first loop body includes 3,000 to 175,000 first fibers, and the diameter of any first fiber ranges from 10 to 30 μm; The second yarn loop assembly includes 10 to 50 second loop bodies, each of which has 3,000 to 175,000 second fibers in its cross-section, and each of the second fibers has a diameter ranging from 10 to 30 μm.

9. The lap belt for a seatbelt as described in claim 5, characterized in that, The length of the first fabric piece is L 片 The first loop assembly extends L1 on the first fabric piece, and the second loop assembly extends L2 on the first fabric piece. 片 The constraint relationship between L1 and L2 is as follows: 0.8L 片 ≤L1+L2≤L 片 L1=L2.

10. The use of the harness belt as described in any one of claims 5 to 9 in a rock climbing harness.

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