A type of warm tights

Abstract

This utility model belongs to the technical field of stockings, specifically relating to a warm, bare-leg stocking, comprising a stocking body including a foot area, an ankle area, a leg area, and a knee area. The ankle area connects the foot area and the leg area, and the knee area is located on the leg area. The elastic modulus of the ankle area is greater than that of the foot area but less than that of the leg area. The elastic modulus of the knee area is less than that of both the foot and leg areas. By setting differentiated elastic moduli for different areas, the elastic deformation capacity of different areas can be adjusted, achieving a zoned elastic design and improving wearing comfort.

Description

Technical Field

[0001] This utility model belongs to the technical field of socks, specifically relating to a type of warm, bare-leg sock. Background Technology

[0002] In today's era where fashion and comfort go hand in hand, bare leg stockings, as a stylish item that combines warmth and aesthetics, are beloved by a wide range of consumers. Whether seeking warmth for the legs in the cold winter or showcasing leg lines in the cooler seasons, bare leg stockings have become a wardrobe essential. However, as consumers' demands for a superior wearing experience continue to rise, the limitations of traditional bare leg stockings in many aspects are becoming increasingly apparent.

[0003] Traditional tights, with their uniform elasticity, can cause a feeling of tightness and friction when moving joints such as the knees, restricting joint movement and reducing the wearer's comfort. Utility Model Content

[0004] The purpose of this utility model is to provide a warm, non-stick tights to address the shortcomings of existing technologies, thereby solving the technical problems of inconsistent elasticity and low wearer comfort in existing non-stick tights.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] This utility model provides a thermal leg warmer, comprising a leg body, the leg body including a foot area, an ankle area, a leg area, and a knee area. The ankle area connects the foot area and the leg area, and the knee area is disposed on the leg area. The elastic modulus of the ankle area is greater than that of the foot area and less than that of the leg area, and the elastic modulus of the knee area is less than that of both the foot area and the leg area.

[0007] In some embodiments, the leg region includes a thigh region and a calf region, and the knee region connects the thigh region and the calf region, wherein the elastic modulus of the calf region is greater than the elastic modulus of the thigh region and the elastic modulus of the knee region, and less than the elastic modulus of the ankle region.

[0008] In some embodiments, the sock body includes a front panel and a back panel connected to each other, wherein the knee area is located on the front panel at a greater length than the knee area is located on the back panel.

[0009] In some embodiments, the foot area is located on the rear fabric piece and has a forefoot area, a sole area, and a heel area connected in sequence. The forefoot area and the heel area are provided with anti-slip structures, the anti-slip structures including a plurality of protrusions arranged in a matrix, and the sole area is provided with a breathable layer or breathable holes.

[0010] In some embodiments, the device further includes an anti-friction patch, wherein the foot area includes a toe area and an arch area, the arch area connects the toe area and the ankle area, and a first fitting area is provided on both sides of the arch area, the first fitting area extending at least partially to the toe area, and the anti-friction patch is disposed in the first fitting area;

[0011] And / or, a second fitting area is provided on both sides of the ankle area, and the anti-abrasion patch is disposed in the second fitting area;

[0012] And / or, the connection end between the leg area and the ankle area is provided with an Achilles tendon area, the Achilles tendon area at least partially extending to the ankle area, and the anti-abrasion patch is provided in the Achilles tendon area.

[0013] In some embodiments, the pant body is further included, and two sock bodies are provided, which are disposed opposite each other at the lower end of the pant body. The leg area of ​​each sock body is connected to the lower end of the pant body, and a first elastic band is provided at the upper end of the pant body.

[0014] In some embodiments, a second elastic band connects the leg area of ​​each sock to the pant body;

[0015] And / or, a third elastic band connects the ankle area and the leg area.

[0016] In some embodiments, the trousers are provided with a waistband, the upper end of which is connected to the lower end of the first elastic band.

[0017] In some embodiments, the lower edge of the waistband forms a connecting edge, which is a downwardly convex first arc on the front side of the waistband and an upwardly convex second arc on the rear side of the waistband.

[0018] In some embodiments, the waist belt is provided with adjustment structures on both sides. The adjustment structure includes a first adjustment part and a second adjustment part, which are spaced apart and detachably connected. The first adjustment part is a hook and the second adjustment part is a hook loop.

[0019] Alternatively, the first adjusting part is a female buckle, and the second adjusting part is a female buckle;

[0020] Alternatively, the first adjustment part may be a hook-and-loop fastener, and the second adjustment part may be a loop fastener.

[0021] Compared with the prior art, the beneficial effects achieved by this utility model are as follows:

[0022] This utility model's embodiment of thermal leg warmers, through the design of the sock body, includes a foot area, an ankle area, a leg area connected in sequence, and a knee area located within the leg area. By setting different elastic moduli for different areas, the elastic deformation capacity of different areas is adjusted, achieving a regional elastic design and improving wearing comfort. Since a larger elastic modulus results in smaller elastic deformation under the same external force, and conversely, a smaller elastic modulus results in greater elastic deformation under the same external force, by setting the elastic modulus of the ankle area to be greater than that of the foot area but less than that of the leg area, the ankle area effectively allows for elastic deformation under ankle flexion and extension forces. This deformation conforms to the contours of the ankle bones, providing support and helping to maintain joint stability, reducing the risk of ankle sprains. Simultaneously, it avoids the situation where excessively high elastic modulus leads to weak elastic deformation capacity, restricting the ankle's range of motion and thus reducing the feeling of restriction during exercise. By using a lower elastic modulus in the knee area compared to the foot and leg areas, the knee area effectively achieves a smaller elastic modulus. When subjected to external forces generated by knee joint movement, the knee area can undergo greater elastic deformation to adapt to the knee joint's movement trajectory. This prevents tightness and restriction during joint flexion and extension, effectively avoiding limitations on knee joint movement due to insufficient elasticity in the socks. Simultaneously, the lower elastic modulus in the knee area allows for more even stress distribution during deformation, reducing friction between the knee area and the knee joint. This lowers the risk of pilling and breakage caused by friction, effectively extending the lifespan of the tights.

[0023] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front structural diagram of the bare leg stockings of this utility model.

[0026] Figure 2 This is a schematic diagram of the reverse side structure of the bare leg stockings of this utility model.

[0027] Figure 3 for Figure 1 A magnified structural diagram of point A in the middle.

[0028] Figure 4This is a schematic diagram of the structure of the sock body of this utility model.

[0029] Figure 5 This is one of the partial structural diagrams of the sock body of this utility model.

[0030] Figure 6 This is the second partial structural diagram of the sock body of this utility model.

[0031] Figure 7 This is the third partial structural diagram of the sock body of this utility model.

[0032] The reference numerals in the attached figures are explained as follows:

[0033] 100. Bare-leg stockings;

[0034] 10. Sock body; 11. Foot area; 111. Forefoot area; 112. Sole area; 113. Heel area; 114. Toe area; 115. Arch area; 116. First fit area; 12. Ankle area; 121. Second fit area; 13. Leg area; 131. Thigh area; 132. Calf area; 14. Knee area; 15. Front panel; 16. Back panel; 17. Achilles tendon area; 18. Third elastic band;

[0035] 20. Protrusion;

[0036] 30. Breathable layer;

[0037] 40. Ventilation holes;

[0038] 50. Anti-abrasion pads;

[0039] 60. Trouser body; 61. First elastic band; 62. Second elastic band; 63. Waistband; 631. First arc; 632. Second arc;

[0040] 70. Adjustment structure; 71. First adjustment part; 72. Second adjustment part;

[0041] a. The knee area is located along the length of the front fabric piece; b. The knee area is located along the length of the back fabric piece. Detailed Implementation

[0042] If certain terms are used in the specification and claims to refer to specific components, those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" as used throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0043] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be interpreted as indicating or implying relative importance.

[0044] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0045] The following will be combined with the appendix Figures 1-7 The technical solutions in the embodiments of this utility model are clearly and completely described. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model.

[0046] Please see Figures 1-7 The thermal leg warmers 100 of this utility model embodiment include a leg warmer 10, which includes a foot area 11, an ankle area 12, a leg area 13, and a knee area 14. The ankle area 12 connects the foot area 11 and the leg area 13, and the knee area 14 is disposed on the leg area 13. The elastic modulus of the ankle area 12 is greater than that of the foot area 11 and less than that of the leg area 13. The elastic modulus of the knee area 14 is less than that of both the foot area 11 and the leg area 13.

[0047] Compared with the prior art, the thermal leg warmers 100 of this utility model, through the configuration of the sock body 10, which includes a foot area 11, an ankle area 12, a leg area 13 connected in sequence, and a knee area 14 disposed in the leg area 13, adjusts the elastic deformation ability of different areas by setting different elastic moduli for different areas, thereby realizing regional elastic design and improving wearing comfort. Since the larger the elastic modulus, the smaller the elastic deformation under the same external force, and conversely, the smaller the elastic modulus, the greater the elastic deformation under the same external force. By ensuring that the elastic modulus of the ankle region 12 is greater than that of the foot region 11 but less than that of the leg region 13, the ankle region 12 effectively undergoes elastic deformation to conform to the contours of the ankle bone when subjected to ankle flexion and extension forces. This provides support for the ankle, helps maintain joint stability, and reduces the risk of ankle sprains. Simultaneously, it avoids the limitation of ankle range of motion due to excessively high elastic modulus, thus reducing the feeling of restriction during movement. Similarly, by ensuring that the elastic modulus of the knee region 14 is less than that of the foot region 11 and the leg region 13, the knee region 14 effectively has a lower elastic modulus. When subjected to external forces generated by knee joint movement, the knee region 14 can undergo greater elastic deformation to adapt to the movement trajectory of the knee joint. During joint flexion and extension, there is no feeling of tightness or restriction, effectively preventing the socks from restricting knee joint movement due to insufficient elasticity. Meanwhile, the smaller elastic modulus of the knee area 14 allows the stress to be distributed more evenly when the knee area 14 is deformed under force, reducing the friction between the knee area 14 and the knee joint, thereby reducing the risk of pilling and damage caused by friction and effectively extending the service life of the bare thigh stockings 100.

[0048] In some embodiments, the leg region 13 includes a thigh region 131 and a calf region 132, and the knee region 14 connects the thigh region 131 and the calf region 132. The elastic modulus of the calf region 132 is greater than that of the thigh region 131 and the knee region, but less than that of the ankle region 12. Through the combined use of the thigh region 131 and the calf region 132, the elastic modulus of the calf region 132 is greater than that of the thigh region 131 and the knee region, but less than that of the ankle region 12. This effectively results in a larger elastic modulus for the calf region 132 and a relatively smaller elastic modulus for the thigh region 131. During exercise, the calf region 132, with its larger elastic modulus, can better wrap and support the calf muscles during elastic deformation, reducing muscle vibration amplitude, decreasing friction between muscle fibers, and effectively alleviating calf muscle fatigue during exercise. The thigh area 131, with its lower elastic modulus, provides ample room for the thigh skin and muscles to stretch, preventing marks and discomfort from excessive pressure during prolonged sitting or standing. Simultaneously, the ankle area 12, calf area 132, and thigh area 131 form an elastic modulus gradient, helping to secure the tights 100 firmly to the leg and preventing them from slipping due to gravity or movement, thus ensuring stability and durability of wear.

[0049] Understandably, the elastic modulus of the thigh area 131 is equal to or less than that of the knee area 14. This effectively prevents the thigh area 131 from constricting the thigh too tightly, reducing the formation of marks and allowing the wearer to maintain comfort and ease of movement even during prolonged sitting or standing, thus improving overall comfort. When the elastic modulus of the thigh area 131 is less than that of the knee area 14, it effectively prevents the weaker elastic deformation capacity of the thigh area 131 from restricting the range of motion of the knee joint, ensuring knee joint flexibility.

[0050] In some embodiments, the calf region 132 includes a gastrocnemius muscle region, the elastic modulus of which is greater than that of the thigh region 131 but less than that of the ankle region 12. This effectively results in a larger elastic modulus in the gastrocnemius muscle region and a relatively smaller elastic modulus in the thigh region 131. During exercise, the gastrocnemius muscle region with a larger elastic modulus can better wrap and support the gastrocnemius muscle of the calf during elastic deformation, reducing the amplitude of gastrocnemius muscle vibration and effectively alleviating gastrocnemius muscle fatigue during exercise.

[0051] In some embodiments, the sock body 10 includes a front panel 15 and a back panel 16 connected to each other, with the knee area 14 located on the front panel 15 at a length a greater than the knee area 14 located on the back panel 16 at a length b. Because of the patella and other protruding structures 20 on the front side of the knee joint, the skin on the front side stretches more during flexion and extension. The longer length a of the knee area 14 on the front panel 15 provides more fabric extension space for the front side of the knee joint. When the knee joint is bent, the front panel 15 has sufficient fabric length to accommodate skin stretching, avoiding tightness and marks due to insufficient fabric, thus improving wearing comfort. The skin on the back side of the knee joint wrinkles during flexion and extension. The relatively shorter length b of the knee area 14 on the back panel 16 effectively prevents excessive fabric from piling up on the back side. When the knee joint is bent, the knee area 14 located on the back panel 16 can better conform to the knee joint, reducing wrinkles and improving the aesthetics of wearing the sock.

[0052] In some embodiments, the foot area 11, located on the rear fabric piece 16, has a forefoot area 111, a sole area 112, and a heel area 113 connected in sequence. Both the forefoot area 111 and the heel area 113 are provided with anti-slip structures, each including a plurality of matrix-arranged protrusions 20. The sole area 112 is provided with a breathable layer 30 or breathable holes 40. Through the coordinated use of the forefoot area 111, the sole area 112, and the heel area 113, with their anti-slip structures including a plurality of matrix-arranged protrusions 20, the friction between the tights 100 and the sole or floor is effectively increased, preventing the foot from sliding inside the shoe or on the floor, reducing the risk of slipping, and thus effectively enhancing the anti-slip performance of the tights 100 and improving walking safety. The sole area 112 is equipped with a breathable layer 30 or breathable holes 40, which can accelerate air circulation and expel heat and moisture generated on the feet in time, keeping the feet dry. At the same time, when the sole area 112 is equipped with breathable holes 40, it effectively reduces the pressure of the sole area 112 on the sole of the foot, allowing the wearer to maintain a comfortable wearing experience during long periods of standing or walking.

[0053] In some embodiments, the thermal leg warmers 100 further include an anti-friction patch 50. The foot area 11 includes a toe area 114 and an arch area 115. The arch area 115 connects the toe area 114 and the ankle area 12. A first fitting area 116 is provided on both sides of the arch area 115, and the first fitting area 116 extends at least partially to the toe area 114. The anti-friction patch 50 is disposed in the first fitting area 116. And / or, a second fitting area 121 is provided on both sides of the ankle area 12, and the anti-friction patch 50 is disposed in the second fitting area 121. And / or, an Achilles tendon area 17 is provided at the connection end between the leg area 13 and the ankle area 12, and the Achilles tendon area 17 extends at least partially to the ankle area 12. The anti-friction patch 50 is disposed in the Achilles tendon area 17. With the anti-friction pads 50 in place, the sides of the toe area 114, the sides of the arch area 115, the sides of the ankle, and the Achilles tendon area 17 are prone to wear and tear during daily walking and exercise due to frequent friction with the inner wall of the shoe. Placing the anti-friction pads 50 in these areas effectively acts as a cushioning layer, reducing direct friction between the tights 100 and the shoe body, thereby protecting the tights 100 and extending its lifespan.

[0054] Understandably, the anti-abrasion patch 50 has an adhesive layer, and the anti-abrasion patch 50 is detachably attached to at least one of the first contact area 116, the second contact area 121, and the Achilles tendon area 17 via the adhesive layer. The anti-abrasion patch 50 is an elastic sheet, which, while providing protection, can closely adhere to the skin and the surface of the sock without causing any foreign body sensation or discomfort.

[0055] In some embodiments, the thermal tights 100 further include pantyhose 60. Two tights 10 are provided, positioned opposite each other at the lower end of the pantyhose 60. The leg area 13 of each tights 10 is connected to the lower end of the pantyhose 60. A first elastic band 61 is provided at the upper end of the pantyhose 60. By designing the pantyhose 60, the tights 10 are connected to the lower end of the pantyhose 60 via the leg area 13, effectively integrating the tights 10 and pantyhose 60 into a single design. This avoids the awkwardness of the tights shifting or stacking, maintaining a neat and tidy appearance and improving dressing efficiency and aesthetics. The first elastic band 61 can adaptively adjust according to the wearer's waist circumference, providing appropriate support. This ensures the pantyhose 60 stays securely in place without slipping, and prevents excessive tightness or marks, maintaining comfort even after prolonged wear.

[0056] In some embodiments, a second elastic band 62 connects the leg area 13 of each sock 10 to the pant body 60; and / or, a third elastic band 18 connects the ankle area 12 to the leg area 13. The second elastic band 62, positioned between the leg area 13 of the sock 10 and the pant body 60, allows for dynamic adjustment of tightness according to the wearer's leg circumference, while preventing the connection between the pant body 60 and the sock 10 from slipping up or falling down. The third elastic band 18, positioned between the ankle area 12 and the leg area 13, effectively prevents the sock 10 from slipping between the calf and ankle, reducing discomfort caused by sock shifting, eliminating the need for frequent adjustments, and allowing for greater freedom of movement for the wearer.

[0057] In some embodiments, a waistband 63 is provided on the trousers 60, the upper end of which is connected to the lower end of the first elastic band 61. Although the first elastic band 61 provides basic waist support, the trousers 60 may still slip down during vigorous exercise or prolonged wear. The waistband 63 provides additional support to the waist. Simultaneously, while the first elastic band 61 provides initial waist tightening and positioning, the waistband 63 further enhances the shaping effect, moderately tightening waist fat to create a slender waistline and optimize the waist-to-leg line.

[0058] In some embodiments, the lower edge of the waist train 63 forms a connecting edge. The connecting edge is a downwardly convex first arc 631 on the front side of the waist train 63, and an upwardly convex second arc 632 on the rear side of the waist train 63. Through the combined use of the first arc 631 and the second arc 632, the downwardly convex first arc 631 on the front side of the waist train 63 better conforms to the contour of the waist and abdomen, and the upwardly convex second arc 632 on the rear side of the waist train 63 better conforms to the contour of the hips. This not only improves the shaping effect of the waist train 63 but also conforms to ergonomic design, enhancing wearing comfort.

[0059] In some embodiments, the waistband 63 is provided with adjustment structures 70 on both sides. Each adjustment structure 70 includes a first adjustment part 71 and a second adjustment part 72, which are spaced apart and detachably connected. The first adjustment part 71 is a hook and the second adjustment part 72 is a hook-and-loop fastener; or, the first adjustment part 71 is a female buckle and the second adjustment part 72 is a female buckle; or, the first adjustment part 71 is a hook and loop fastener and the second adjustment part 72 is a loop fastener.

[0060] By adjusting the structure 70, which includes a first adjusting part 71 and a second adjusting part 72, the two parts are detachably connected. This allows the structure 70 to flexibly adjust the tightness of the waistband 63 according to the wearer's waist size, enabling the waistband 63 to fit different waist sizes and improving its shaping effect. Furthermore, the first adjusting part 71 is a hook, buckle, or Velcro hook surface, and correspondingly, the second adjusting part 72 is a hook-and-loop, buckle, or Velcro loop surface, effectively increasing the options available for the adjustment structure 70 to adapt to different needs.

[0061] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

Claims

1. A thermal pantyhose characterized by: The sock body (10) includes a foot area (11), an ankle area (12), a leg area (13), and a knee area (14). The ankle area (12) connects the foot area (11) and the leg area (13). The knee area (14) is disposed on the leg area (13). The elastic modulus of the ankle area (12) is greater than that of the foot area (11) and less than that of the leg area (13). The elastic modulus of the knee area (14) is less than that of both the foot area (11) and the leg area (13).

2. The thermal light panty-hose according to claim 1, characterized in that: The leg region (13) includes a thigh region (131) and a calf region (132), and the knee region (14) connects the thigh region (131) and the calf region (132). The elastic modulus of the calf region (132) is greater than the elastic modulus of the thigh region (131) and the elastic modulus of the knee region, and less than the elastic modulus of the ankle region (12).

3. The thermal pantyhose according to claim 2, wherein: The sock body (10) includes a front fabric piece (15) and a back fabric piece (16) connected to each other, and the knee area (14) is located on the front fabric piece (15) at a length (a) greater than the knee area (14) is located on the back fabric piece (16) at a length (b).

4. The thermal pantyhose according to claim 3, wherein: The foot area (11) is located on the rear fabric piece (16) and has a forefoot area (111), a sole area (112) and a heel area (113) connected in sequence. The forefoot area (111) and the heel area (113) are both provided with anti-slip structures. The anti-slip structures include a plurality of protrusions (20) arranged in a matrix. The sole area (112) is provided with a breathable layer (30) or breathable holes (40).

5. The thermal pantyhose of claim 1, wherein: It also includes an anti-friction patch (50), the foot area (11) includes a toe area (114) and an arch area (115), the arch area (115) connects the toe area (114) and the ankle area (12), a first fitting area (116) is provided on both sides of the arch area (115), the first fitting area (116) extends at least partially to the toe area (114), and the anti-friction patch (50) is disposed in the first fitting area (116); And / or, a second fitting area (121) is provided on both sides of the ankle area (12), and the anti-abrasion patch (50) is provided in the second fitting area (121); And / or, the connection end between the leg area (13) and the ankle area (12) is provided with an Achilles tendon area (17), the Achilles tendon area (17) extends at least partially to the ankle area (12), and the anti-abrasion patch (50) is provided in the Achilles tendon area (17).

6. The thermal pantyhose of claim 1, wherein: It also includes a pant body (60), and two sock bodies (10) are provided. The two sock bodies (10) are positioned opposite each other at the lower end of the pant body (60). The leg area (13) of each sock body (10) is connected to the lower end of the pant body (60). The upper end of the pant body (60) is provided with a first elastic band (61).

7. The thermal pantyhose according to claim 6, characterized in that: A second elastic band (62) is connected between the leg area (13) of each sock body (10) and the pant body (60); And / or, a third elastic band (18) connects the ankle area (12) and the leg area (13).

8. The thermal pantyhose according to claim 6, wherein: The trousers (60) are provided with a waist belt (63), the upper end of which is connected to the lower end of the first elastic band (61).

9. The thermal pantyhose according to claim 8, characterized in that: The lower edge of the waistband (63) forms a connecting edge. The connecting edge is a downwardly convex first arc (631) on the front side of the waistband (63), and an upwardly convex second arc (632) on the rear side of the waistband (63).

10. The thermal pantyhose according to claim 8, wherein: The waist belt (63) is provided with adjustment structures (70) on both sides. The adjustment structure (70) includes a first adjustment part (71) and a second adjustment part (72). The first adjustment part (71) and the second adjustment part (72) are spaced apart and are detachably connected. The first adjustment part (71) is a hook and the second adjustment part (72) is a hook ring. Alternatively, the first adjusting part (71) is a female buckle, and the second adjusting part (72) is a female buckle; Alternatively, the first adjustment part (71) is a hook and loop fastener, and the second adjustment part (72) is a loop fastener.

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