Underwear fastener assembly
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Utility models
- Current Assignee / Owner
- Filing Date
- 2026-02-12
- Publication Date
- 2026-04-13
Smart Images
Figure 0003255506000001_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of female underwear accessories, and particularly to an underwear fastener assembly.
Background Art
[0002] An underwear back clasp, as an important connecting component of underwear such as bras, usually includes a hook body and a buckle body that interlock with each other, and both are fixed to both ends of the back band of the underwear respectively. When in use, by engaging at least one hook of the hook body with the corresponding buckle of the buckle body, the tightening and size adjustment of the underwear can be realized.
[0003] In some related technologies, the buckle body usually includes one row or multiple rows of metal or plastic buckles, one layer of inner lining fabric, and one layer of outer lining fabric. The buckle is generally fixed to the inner lining fabric by sewing or embedding, and the inner lining fabric and the outer lining fabric are thermocompression bonded by a hot melt adhesive layer or other bonding layers, thereby suppressing the relative slip of the two layers of fabrics during use.
[0004] However, in actual use, due to repeated stretching and contraction, washing, friction, and changes in ambient temperature and humidity, etc., the bonding layer between the inner lining fabric and the outer lining fabric is likely to deteriorate, embrittle, or have a decrease in adhesive strength, so relative displacement may occur between the inner lining fabric and the outer lining fabric. Such displacement can cause the fixed buckle to shift from its original designed position, making it difficult for the hook of the hook body to be accurately aligned with the corresponding buckle and smoothly engage, which may affect the wearing comfort of the wearer.
[0005] Therefore, in order to solve the above-mentioned problem of buckle displacement due to the deterioration of the bonding layer, there is an urgent need for an underwear back clasp structure with a stable structure and difficult to slip between layers.
Summary of the Invention
[0006] The purpose of this invention is to provide an undergarment fastening assembly that solves one or more problems in the prior art, such as difficulty in accurately aligning the hook and buckle due to misalignment of the buckle caused by deterioration of the bonded layer over time, which affects the wearer's comfort. [Means for solving the problem]
[0007] To achieve the above-mentioned objectives, this invention is realized by the following technical solution.
[0008] An undergarment fastening assembly is provided, which includes a buckle component, the buckle component having a fabric layer, multiple rows of buckles and at least one welding point line, The woven fabric layer includes an inner layer, an intermediate layer, a lining layer, and a covering layer which are sequentially laminated, and the covering layer is provided with an opening, and the woven fabric layer has a first end along its length that is formed as a free end, and a second end that is used to connect to the underwear body. The aforementioned multiple rows of buckles are fixed to the lining layer, arranged along the length of the fabric layer, and extend out of the opening in the covering layer to the outer surface of the covering layer, with each row of buckles including at least one buckle that is spaced apart. The at least one welding point line is located in an adjacent region of a row of buckles closest to the second end, and the welding point line includes at least one spaced-apart point or short line first welding point that fuses the inner layer, the intermediate layer, the backing layer and the coating layer in the adjacent region.
[0009] Optionally, each buckle component further includes a second welding point located in the ring-shaped region of each buckle, the second welding point fusing the inner layer, the intermediate layer, the lining layer, and the coating layer in the ring-shaped region of the buckle.
[0010] Optionally, each row of buckles includes at least two buckles spaced apart, the weld point line extends along the width direction of the fabric layer and is located between two adjacent buckles in the row of buckles closest to the second end.
[0011] Optionally, each row of buckles includes at least two buckles spaced apart, the weld point line extends along the width direction of the fabric layer and is located between the buckle in the row closest to the second end and the second end itself.
[0012] Optionally, the length of the welding point line is greater than or equal to the arrangement length of the row of buckles closest to the second end.
[0013] Optionally, the welding point line includes at least three of the first welding points, and the first welding points are evenly spaced along the width direction of the fabric layer.
[0014] Optionally, the outer surface of the inner layer does not have any obvious protrusions or recesses at the positions corresponding to the first and second welding points.
[0015] Optionally, each buckle in each row is spaced evenly apart.
[0016] Optionally, the buckle is sewn to the lining layer.
[0017] Optionally, the materials for the inner layer, the lining layer, and the covering layer are all ultrasonically weldable gauze-like fabrics, and the material for the intermediate layer is ultrasonically weldable nonwoven fabric.
[0018] Optionally, the undergarment fastening assembly further includes a hook component, the hook component including at least one hook for detachably engaging with the buckle of the buckle component. [Effects of the Invention]
[0019] Compared to the prior art, the underwear fastener assembly provided in this invention has the following advantageous effects.
[0020] The underwear fastener assembly provided in this invention includes a buckle component, the buckle component having a fabric layer, a plurality of rows of buckles, and at least one welding point line, the fabric layer comprising sequentially laminated inner layer, intermediate layer, lining layer and coating layer, the coating layer having an opening, the fabric layer having a first end along its length formed as a free end and a second end used to connect to the underwear body, the plurality of rows of buckles fixed to the lining layer and arranged along the length of the fabric layer and drilling out from the opening in the coating layer to the outer surface of the coating layer, each row of buckles comprising at least one spaced-apart buckle, the at least one welding point line located in the adjacent region of the row of buckles closest to the second end, the welding point line comprising at least one spaced-apart point or short line first welding point, the first welding point fusing the inner layer, the intermediate layer, the lining layer and the coating layer in the adjacent region. As a result, the underwear fastener assembly provided in this invention has at least one welding point line in the adjacent area of the row of buckles closest to the second end, and the welding point line includes at least one point-like or short-line first welding point distributed at intervals, and each first welding point fuses the inner layer, intermediate layer, lining layer and covering layer in the adjacent area, thereby forming a fused-fixed structure in which the fabrics of each layer located in the adjacent area are integrated. This prevents relative slippage between the fabrics of each layer, improves the overall structural stability, improves the alignment accuracy of the hook and buckle, enhances the wearer's comfort, and also meets the durability requirements under dynamic wear of highly elastic underwear. Furthermore, by adopting a discrete welding point structure in which the welding point lines are distributed at intervals and each first welding point is independent of the others, even if one of the first welding points fails, it does not cause a continuous failure of adjacent first welding points, thereby maintaining effective fixation between the fabric layers and improving the reliability and durability of the product during use.
[0021] In addition, each of the buckle components further has a second welding point located in the inner region of the loop of each buckle, and the second welding point fuses the inner layer, the intermediate layer, the lining layer, and the coating layer in the inner region of the loop of the buckle. Thereby, the fastening device assembly for underwear provided by the present invention further installs a second welding point so as to fuse the inner layer, the intermediate layer, the lining layer, and the coating layer in the inner region of the loop of the buckle, and forms a molten fixed structure integrated by the fabric of each layer in the region where the buckle receives force, which can more effectively prevent repeated stretching and relative slipping between layers during washing, not only greatly improving the reliability of buckle fixation, but also avoiding problems such as buckling, loosening of the buckle due to interlayer slip, and wrinkles in the fabric.
Brief Description of the Drawings
[0022] [Figure 1] It is a diagram showing the structure of a fastening device assembly for underwear provided in an embodiment of the present invention. [Figure 2] It is a diagram showing the internal structure of a material strip where a buckle component is located provided in an embodiment of the present invention. [Figure 3] It is a diagram showing the three-dimensional structure of a buckle component provided with a short welding point line provided in an embodiment of the present invention. [[ID=I8]] [Figure 4] It is a diagram showing the structure of the buckle component shown in FIG. 3 under different viewing angles. [Figure 5] [ It is a diagram showing the three-dimensional structure of a buckle component provided with a short welding point line provided in another embodiment of the present invention. [Figure 6] It is a diagram showing the structure of the buckle component shown in FIG. 5 under different viewing angles. [Figure 7] It is a diagram showing the three-dimensional structure of a buckle component provided with a long welding point line provided in an embodiment of the present invention. [Figure 8] It is a diagram showing the structure of the buckle component shown in FIG. 7 under different viewing angles. [Figure 9]This figure shows the three-dimensional structure of a buckle component provided in another embodiment of the present invention, which is provided with a long welding point line. [Figure 10] This figure shows the structure of the buckle component shown in Figure 9 under different viewing angles. [Figure 11] This is an illustrative diagram of a buckle component provided with four sets of short welding point lines as offered in the present invention. [Figure 12] This is an illustrative diagram of a buckle component provided with four sets of elongated welding point lines as offered in the present invention. [Figure 13] This figure shows the structure when a material strip containing a buckle component, provided in one embodiment of the present invention, is subjected to a sewing process. [Figure 14] This figure shows the structure when a material strip containing a buckle component, provided in one embodiment of the present invention, is subjected to a perforation process. [Figure 15] This figure shows the structure when a material strip containing a buckle component provided in one embodiment of the present invention is subjected to pressure treatment. [Figure 16] This figure shows the structure when a material strip containing a buckle component, provided in one embodiment of the present invention, is die-cut. [Figure 17] This figure shows the structure when the material strip containing the buckle component provided in one embodiment of the present invention is subjected to edge flanging treatment. [Modes for carrying out the invention]
[0023] The underwear fastener assembly proposed in this invention will be described in more detail below, in conjunction with the attached drawings and specific embodiments. The advantages and features of this invention may become clearer from the following description. Note that all attached drawings are in a highly simplified form and use imprecise proportions, solely for the purpose of easily and clearly illustrating embodiments of this invention. Please refer to the attached drawings for a clearer and easier understanding of the purpose, features, and advantages of this invention. It should also be understood that the structures, proportions, sizes, etc., shown in the attached drawings of this specification are for the sole purpose of assisting those skilled in the art in understanding and interpreting the contents disclosed herein, and are not intended to limit the conditions for implementation of this invention. Modifications of the structure, changes in proportions, or adjustments in size are considered to be within the scope of the technical contents disclosed herein, as long as the effects and purposes achieved by this invention are the same or similar. The specific design features of this invention disclosed herein, such as specific dimensions, orientation, position, and shape, are partially determined by the specific application and usage environment. In the following embodiments, the same reference numerals are used for identical parts or parts with the same function across different drawings, and redundant explanations may be omitted.
[0024] An undergarment fastener assembly is provided in one embodiment of the present invention. Specifically, see Figures 1 and 2. Figure 1 is a diagram showing the structure of an undergarment fastener assembly provided in one embodiment of the present invention. Figure 2 is a diagram showing the internal structure of a material strip in which a buckle component provided in one embodiment of the present invention is located. As can be seen from Figures 1 and 2, the undergarment fastener assembly includes a buckle component 10, which has a fabric layer 11, multiple rows of buckles, a second welding point 13, and at least one welding point line 14. The fabric layer 11 includes sequentially laminated inner layers 111, intermediate layers 112, lining layers 113, and covering layers 114, the covering layer 114 having an opening 1141, the fabric layer 11 having a first end along its length as a free end and a second end used to connect to an undergarment body (not shown). Multiple rows of buckles are fixed to the lining layer 113, arranged along the length of the fabric layer 11, and extend through the opening 1141 of the covering layer 114 to the outer surface of the covering layer 114, and each row of buckles includes at least one spaced buckle 12. Second welding points 13 are each located in the ring-shaped region of each buckle 12, and the second welding points 13 fuse the inner layer 111, the intermediate layer 112, the lining layer 113 and the covering layer 114 in the ring-shaped region of the buckle 12. At least one welding point line 14 is located in an adjacent area of a row of buckles closest to the second end (i.e., the underwear body side), and the welding point line 14 includes at least one spaced-apart point or short line first welding point 141 which fuses the inner layer 111, the intermediate layer 112, the lining layer 113 and the covering layer 114 in the adjacent area.
[0025] As a result, the underwear fastener assembly provided in this embodiment can be configured by installing a second welding point 13 and fusing the inner layer 111, intermediate layer 112, lining layer 113, and covering layer 114 in the ring-shaped region of the buckle 12. This creates a fused-fixed structure where the fabric of each layer integrates in the region where the buckle 12 is subjected to force. This effectively prevents repeated stretching and relative slippage between layers during washing, improving the reliability of fastening by the buckle 12 and avoiding problems such as distortion, loosening, and wrinkles in the fabric caused by slippage between layers. Furthermore, by providing at least one welding point line 14 in the adjacent region of the row of buckles closest to the second end, and by including at least one point-like or short-line first welding point 141 distributed at intervals, and by fusing the inner layer 111, intermediate layer 112, lining layer 113 and covering layer 114 in the adjacent region, a fused fixed structure is formed in which the fabrics of each layer located in the adjacent region are also integrated. This further prevents relative slippage between the fabrics of each layer, improves the overall structural stability, improves the alignment accuracy of the hooks and buckles 12, enhances the wearer's comfort, and also meets the durability requirements for highly elastic underwear under dynamic wear. Furthermore, by employing a discrete welding point structure in which the welding point lines 14 are distributed at intervals, and each first welding point 141 is independent of the others, even if one of the first welding points 141 fails, it does not cause a continuous failure of adjacent first welding points 141. This maintains effective fixation between the fabric layers 11 and improves the reliability and durability of the product during use.
[0026] Furthermore, this invention does not limit the welding method for the second welding point 13 and the welding line 14. For example, in some embodiments, both the second welding point 13 and the welding line 14 can be obtained by ultrasonic welding.
[0027] See, for example, Figures 3 and 4. Figure 3 is a diagram showing the three-dimensional structure of a buckle component 10 provided in one embodiment of the present invention, which is provided with a short welding point line. Figure 4 is a diagram showing the structure of the buckle component 10 shown in Figure 3 under different viewing angles. In Figure 4, a is a front view, b is a top view, c is a right side view, d is a bottom view, e is a left side view, and f is a rear view. As shown in Figures 3 and 4, in some embodiments, the welding point line 14 is a short welding point line, and each row of buckles includes at least two buckles 12 that are spaced apart, the spacing between two adjacent buckles 12 in each row of buckles is relatively small, the spacing between two adjacent rows of buckles 12 is relatively large, the welding point line 14 extends along the width direction of the fabric layer 11 and is located between two adjacent buckles 12 in the row of buckles 12 closest to the second end.
[0028] In this invention, the spacing between two adjacent buckles 12 in each row of buckles and the spacing between two adjacent rows of buckles 12 in the buckle component 10 where the short welding point line is provided are not limited.
[0029] See, for example, Figures 5 and 6. Figure 5 shows the three-dimensional structure of a buckle component 10 provided with a short welding line 14, as provided in another embodiment of the present invention. Figure 6 shows the structure of the buckle component 10 shown in Figure 5 under different viewing angles. In Figure 6, a is a front view, b is a top view, c is a right side view, d is a bottom view, e is a left side view, and f is a rear view. As can be seen by comparing Figure 5 and Figure 3, in some other embodiments, in the buckle component 10 provided with a short welding line, the spacing between two adjacent buckles 12 in each row of buckles may be increased, and the spacing between two adjacent rows of buckles 12 may be decreased.
[0030] The above is merely an illustrative description of the case where the welding point line 14 is a short welding point line, and does not limit the present invention. The present invention does not limit the arrangement method of the welding point line 14, and in some other embodiments, the welding point line 14 may be a long welding point line.
[0031] See, for example, Figures 7 and 8. Figure 7 is a diagram showing the three-dimensional structure of a buckle component 10 provided in one embodiment of the present invention, which is provided with a long welding point line. Figure 8 is a diagram showing the structure of the buckle component 10 shown in Figure 7 under different viewing angles. In Figure 8, a is a front view, b is a top view, c is a left side view, d is a right side view, e is a left perspective view, and f is a right perspective view. As shown in Figures 7 and 8, in some embodiments, the welding point line 14 is a long welding point line, and each row of buckles includes at least two buckles 12 that are spaced apart, the spacing between two adjacent buckles 12 in each row of buckles is relatively small, the spacing between two adjacent rows of buckles 12 is relatively large, the welding point line 14 extends along the width direction of the fabric layer 11 and is located between the row of buckles closest to the second end and the second end.
[0032] In this invention, the spacing between two adjacent buckles 12 in each row of buckles and the spacing between two adjacent rows of buckles 12 in the buckle component 10 provided with the long welding point line are not limited.
[0033] For example, see Figures 9 and 10. Figure 9 shows the three-dimensional structure of a buckle component 10 having a long welding line, provided in another embodiment of the present invention. Figure 10 shows the structure of the buckle component 10 shown in Figure 9 under different viewing angles. In Figure 10, a is a front view, b is a top view, c is a left side view, d is a right side view, e is a left perspective view, and f is a right perspective view. As can be seen by comparing Figure 9 and Figure 7, in some other embodiments, in the buckle component 10 having a long welding line, the spacing between two adjacent buckles 12 in each row of buckles may be increased, and the spacing between two adjacent rows of buckles 12 may be decreased.
[0034] Furthermore, whether the buckle component 10 has short welding point lines or long welding point lines, the comfort and durability of the buckle 12 can be optimized by adjusting the distribution density of the buckles 12 according to the actual needs.
[0035] Preferably, in some embodiments, when the weld line 14 is a long weld line, the length of the weld line 14 is greater than or equal to the arrangement length of the row of buckles closest to the second end (the arrangement length is the total span between the outer edges of the two outermost buckles 12). This ensures that the length of the long weld line covers the entire arrangement range of the buckle row, resulting in an even distribution of forces at the second end, avoiding insufficient fastening of the buckles 12 on the edges and improving overall connection reliability.
[0036] Furthermore, the welding point line 14 in this invention (especially the long welding point line) not only effectively solves the problem of misalignment of the buckle 12 due to the deterioration of the bonded layer over time, but also plays a role in limiting its position. As a guide / marking element when sewing the buckle component 10 to the underwear body, it can limit the distance that the edge of the underwear body is inserted into the buckle component 10. In mass production of underwear, this makes it possible to maintain a uniform position where the edge of the underwear body is inserted into the buckle component 10, thereby improving the quality of the underwear.
[0037] Preferably, the welding point line 14 includes at least three of the first welding points 141, and the first welding points 141 are evenly spaced along the width direction of the fabric layer 11. By providing at least three first welding points 141 evenly spaced along the width direction of the fabric layer 11, the force received at the second end can be made more uniform, and slippage between the fabric layers 11 can be effectively suppressed, thereby improving overall fixing reliability.
[0038] Furthermore, the outer surface of the inner layer 111 does not have any obvious protrusions or recesses at the positions corresponding to the second welding point 13 and the first welding point 141. By keeping the outer surface of the inner layer 111 flat in the welding area, the comfort and feel against the skin when worn in close contact can be greatly improved.
[0039] Furthermore, this invention does not limit the number of rows of buckles in the buckle component 10 or the number of buckles 12 in each row.
[0040] For example, see Figure 11. Figure 11 is an illustrative diagram of a buckle component 10 provided with four sets of short weld point lines as provided in the present invention. As shown in Figure 11, in some embodiments, all weld point lines 14 in the four sets of buckle component 10, a, b, c, and d, are short weld point lines. In the buckle component 10 of type a, four rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes two spaced-apart buckles 12; in the buckle component 10 of type b, two rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes three spaced-apart buckles 12; in the buckle component 10 of type c, three rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes three spaced-apart buckles 12; and in the buckle component 10 of type d, three rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes four spaced-apart buckles 12.
[0041] For example, see Figure 12. Figure 12 is an illustrative diagram of a buckle component 10 provided with four sets of elongated weld point lines as provided in the present invention. As shown in Figure 12, in some embodiments, the weld point lines 14 in the four sets of buckle component 10, a, b, c, and d, are all elongated weld point lines. In the buckle component 10 of type a, four rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes two spaced-apart buckles 12; in the buckle component 10 of type b, two rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes three spaced-apart buckles 12; in the buckle component 10 of type c, three rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes three spaced-apart buckles 12; and in the buckle component 10 of type d, three rows of buckles are arranged along the length of the fabric layer 11, and each row of buckles includes four spaced-apart buckles 12.
[0042] Preferably, in some embodiments, each buckle 12 in each row of buckles in the buckle component 10 is installed at equal intervals.
[0043] Furthermore, this invention does not limit the method of fixing the buckle 12 to the lining layer 113. For example, in some embodiments, the buckle 12 is sewn to the lining layer 113 by a sewing device 30.
[0044] Preferably, in some embodiments, the materials of the inner layer 111, the lining layer 113, and the covering layer 114 are all ultrasonically weldable gauze-like fabrics, and the material of the intermediate layer 112 is an ultrasonically weldable nonwoven fabric. This provides a good foundation for welding and fixing between the fabrics of each layer, as the materials of the inner layer 111, the lining layer 113, and the covering layer 114 are all ultrasonically weldable gauze-like fabrics, and the material of the intermediate layer 112 is an ultrasonically weldable nonwoven fabric. In addition, the gauze-like fabrics and nonwoven fabrics also have good breathability, which improves comfort when wearing the underwear.
[0045] For example, in some embodiments, the inner layer 111, the lining layer 113, and the covering layer 114 may all be gauze-like fabrics containing thermoplastic fibers, and the intermediate layer 112 may be a thermoplastic nonwoven fabric. All of these materials are ultrasonically weldable.
[0046] Furthermore, refer again to Figure 1. As shown in Figure 1, in some embodiments, the underwear fastener assembly further includes a hook component 20, the hook component 20 including at least one hook 21, which is used to detachably engage with the buckle 12 of the buckle component 10.
[0047] To better understand the present invention, the manufacturing process of the buckle component 10 in the present invention will be described exemplarily. The manufacturing process of the buckle component 10 includes sewing, punching, pressing, die cutting, edge flanging, and edge trimming.
[0048] For example, refer to Figures 13 to 17 and Figure 2. Figure 13 is a diagram showing the structure of the material strip containing the buckle component 10 provided in one embodiment of the present invention when it is subjected to sewing. Figure 14 is a diagram showing the structure of the material strip containing the buckle component 10 provided in one embodiment of the present invention when it is subjected to perforation. Figure 15 is a diagram showing the structure of the material strip containing the buckle component 10 provided in one embodiment of the present invention when it is subjected to pressure treatment. Figure 16 is a diagram showing the structure of the material strip containing the buckle component 10 provided in one embodiment of the present invention when it is subjected to die-cutting. Figure 17 is a diagram showing the structure of the material strip containing the buckle component 10 provided in one embodiment of the present invention when it is subjected to edge flanging. First, the buckle 12 in the lining layer 113 is sewn by the sewing device 30 to obtain a sewing material strip 31 having a sewing line 15. Next, in order to conceal the sewing line 15, the sewing material strip 31 is perforated. Specifically, a covering layer 114 is laid on the sewing material strip 31, and openings 1141 are provided at all positions in the covering layer 114 corresponding to the buckles 12, so that each buckle 12 is drilled out through the corresponding opening 1141. Subsequently, the material strip 41 awaiting pressurization (i.e., the sequentially stacked inner layer 111, intermediate layer 112, lining layer 113, and covering layer 114 shown in Figure 2) is subjected to pressurization to fix each layer. Specifically, ultrasonic welding is performed on the inner layer 111, intermediate layer 112, lining layer 113, and covering layer 114 located in the ring-shaped region of the buckle 12 by the first ultrasonic welding head 42 located beneath the material strip 41 awaiting pressurization, forming a second welding point 13 in the covering layer 114. Furthermore, in the welding process, the entire material strip can be subjected to pressure treatment by pulling the material strip 41 awaiting pressure treatment using the material tensioning device 40.Subsequently, a stretch fabric (LYCRA®) (not shown) is laid on the pressurized material strip to obtain a die-cutting-ready material strip 50. Through the coordinated operation of a second ultrasonic welding head 51 placed on the die-cutting-ready material strip 50 and a die-cutting blade 52 set below the die-cutting-ready material strip 50, the second ultrasonic welding head 51 welds the stretch fabric while the die-cutting blade 52 cuts it to obtain an edge-flanging-ready material 53. The buckle component 10 in the edge-flanging-ready material 53 obtained after ultrasonic welding and cutting is covered with the stretch fabric, and the edge-flanging-ready material 53 can be turned over by an edge-flanging device 60 to expose the buckle 12, thereby obtaining an edge-flanged material 61. Since the edge-flanging process can hide burrs from the ultrasonic welding and cutting processes, the raw product quality of the buckle component 10 can be improved.
[0049] In summary, the underwear fastener assembly provided in this invention has the following advantages: The underwear fastener assembly provided in this invention includes a buckle component, the buckle component having a fabric layer, a plurality of rows of buckles, and at least one welding point line. The fabric layer includes an inner layer, an intermediate layer, a lining layer, and a covering layer which are sequentially laminated, the covering layer having an opening, the fabric layer having a first end along its length as a free end and a second end used to connect to the underwear body. The plurality of rows of buckles are fixed to the lining layer, arranged along the length of the fabric layer, and protruding from the opening in the covering layer to the outer surface of the covering layer, and each row of buckles includes at least one spaced buckle. At least one welding point line is located in the adjacent region of the row of buckles closest to the second end, and the welding point line includes at least one spaced-spacing dot-like or short-line first welding point, which fuses the inner layer, the intermediate layer, the lining layer and the coating layer in the adjacent region. Thus, the underwear fastener assembly provided in the present invention can be configured such that at least one welding point line is located in the adjacent region of the row of buckles closest to the second end, and the welding point line includes at least one spaced-spacing dot-like or short-line first welding point, and each first welding point fuses the inner layer, the intermediate layer, the lining layer and the coating layer in the adjacent region, thereby forming a fused-fixed structure in which the fabrics of each layer located in the adjacent region are integrated. This prevents relative slippage between the fabrics of each layer, improves the overall structural stability, improves the alignment accuracy of the hook and buckle, enhances the wearer's comfort, and also meets the durability requirements under dynamic wear of highly elastic underwear. Furthermore, by adopting a discrete welding point structure in which welding point lines are distributed at intervals, and because each first welding point is independent of the others, even if one of the first welding points fails, it does not cause a continuous failure of adjacent first welding points. This maintains effective fixation between fabric layers and improves the reliability and durability of the product during use.
[0050] Furthermore, each buckle component further has a second welding point located in the ring-shaped region of the buckle, and the second welding point fuses the inner layer, the intermediate layer, the lining layer, and the covering layer in the ring-shaped region of the buckle. As a result, the underwear fastener assembly provided in this invention, by providing a second welding point and fusing the inner layer, intermediate layer, lining layer, and covering layer in the ring-shaped region of the buckle, can form a fused-fixed structure in which the fabric of each layer integrates in the region where the buckle is subjected to force. This prevents repeated stretching and relative slippage between the layers during washing, improving the reliability of buckle fastening, and also avoids problems such as distortion, loosening, or wrinkles in the fabric of the buckle due to slippage between layers.
[0051] Although preferred embodiments of the present invention have been described above, the present invention is not limited to these embodiments, and any modifications to the present invention that do not deviate from the spirit of the present invention fall within the technical scope of the present invention. [Explanation of symbols]
[0052] 10 Buckle parts 11 woven layers 111 Inner layer 112 Middle Class 113 Back layer 114 Covering layer 1141 Aperture 12 buckles 13. Second welding point 14 welding point lines 141 First welding point 15 Sewing line 20 Hook parts 21 hooks 30 Sewing device 31 Sewing material strips 40 Material tensile device 41 Material strips awaiting pressurization 42 First Ultrasonic Welding Head 50 die-cut material strips 51 Second Ultrasonic Welding Head 52 Die-cut blades 53 Edge flanging waiting material 60 Edge flanging device 61 Edge-flanged material
Claims
1. An undergarment fastening assembly including a buckle component, The buckle component includes a fabric layer, multiple rows of buckles, and at least one welding point line. The woven fabric layer includes an inner layer, an intermediate layer, a lining layer, and a covering layer which are sequentially laminated, and the covering layer is provided with an opening, and the woven fabric layer has a first end along its length that is formed as a free end, and a second end that is used to connect to the underwear body. The aforementioned multiple rows of buckles are fixed to the lining layer, arranged along the length of the fabric layer, and extend out of the opening in the covering layer to the outer surface of the covering layer, and each row of buckles includes at least one buckle that is spaced apart. Underwear fastener assembly, wherein the at least one welding point line is located in an adjacent region of a row of buckles closest to the second end, and the welding point line includes at least one spaced-apart point or short line first welding point that fuses the inner layer, the intermediate layer, the lining layer and the coating layer in the adjacent region.
2. The buckle component further has a second welding point located in the ring-internal region of each buckle, the second welding point fuses the inner layer, the intermediate layer, the lining layer and the coating layer in the ring-internal region of the buckle. The underwear fastener assembly according to claim 1, characterized in that
3. Each row of buckles includes at least two buckles spaced apart, the weld point line extends along the width direction of the fabric layer and is located between two adjacent buckles in the row of buckles closest to the second end, The underwear fastener assembly according to claim 1, characterized in that
4. Each row of buckles includes at least two buckles spaced apart, the weld point line extends along the width direction of the fabric layer and is located between the row of buckles closest to the second end and the second end, The underwear fastener assembly according to claim 1, characterized in that
5. The length of the welding point line is greater than or equal to the length of the row of buckles closest to the second end. The underwear fastener assembly according to claim 4, characterized in that
6. The welding point line includes at least three of the first welding points, and the first welding points are distributed at equal intervals along the width direction of the fabric layer. The underwear fastener assembly according to claim 1, characterized in that
7. The outer surface of the inner layer does not have any obvious protrusions or recesses at the positions corresponding to the first and second welding points. The underwear fastener assembly according to claim 2, characterized in that
8. Each buckle in each row is installed at equal intervals. The underwear fastener assembly according to claim 1, characterized in that
9. The buckle is sewn to the lining layer. The underwear fastener assembly according to claim 1, characterized in that
10. The materials of the inner layer, the lining layer, and the covering layer are all ultrasonically weldable gauze-like fabrics, and the material of the intermediate layer is an ultrasonically weldable nonwoven fabric. The underwear fastener assembly according to claim 1, characterized in that
11. The aforementioned undergarment fastening assembly further includes a hook component, the hook component including at least one hook for detachably engaging with the buckle of the buckle component, The underwear fastener assembly according to claim 1, characterized in that