Assembled lightweight sandals

Abstract

To provide a lightweight sandal that solves the problem that conventional sandals cannot adjust the tightness in different areas. [Solution] The lightweight sandals of the present invention include a sole, a front fixing structure, at least two straps and a tie cord, each strap is assembled on the surface of the sole, each strap has a ring belt, the ring belt is located at the upper end of each strap, the front and rear rings of the ring belt face forward and backward respectively, the tie cord is a single cord with a circular cross section, and the tie cord can form a movable knot on each ring belt, when each movable knot forms a tightening adjustment state, the front tie cord or the rear tie cord of the tie cord can continue to be pulled forward or backward respectively, and when each movable knot is in an adjustment stop state, the front tie cord and the rear tie cord are tightened toward the front and backward respectively, and are firmly tied to each ring belt.

Description

[Technical field]

[0001] The present invention relates to a lightweight sandal, and more particularly to a lightweight assembled sandal. [Background technology]

[0002] Conventional sandals include sandals that use laces to secure the user's feet, which are light and easy to put on and take off, and are popular among outdoor sports enthusiasts. In addition, such products are generally designed in a modular manner, and users can easily disassemble and carry them. However, the binding laces of conventional sandals do not have a design that allows the user to adjust the tightness for each part or area, that is, the user cannot adjust the tightness for each area of ​​the sole of the foot, such as the width of the forefoot or the thickness of the instep, but can only adjust the tightness of the entire sole at one time, making it difficult for users to get a good feeling when using the sandals, and the market competitiveness of the product is reduced.

[0003] In addition, since the conventional sandals use buckles or straps as nodes for adjusting the tightness of the laces, the conventional sandals require more additional structural costs, which is disadvantageous to reducing manufacturing costs.

[0004] Therefore, modular, lightweight sandals that can adjust the tightness according to multiple areas of the foot (such as the width of the forefoot and the thickness of the instep) and reduce manufacturing costs are currently in high demand in the related industry. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-112360 Summary of the Invention [Problem to be solved by the invention]

[0006] The objective of the present invention is to provide a combination of lightweight sandals, which includes a sole, a front fixing structure, at least two straps and a tie string, each of the straps being assembled on the surface of the sole, each of the straps having a ring belt, the ring belt being located at the upper end of each of the straps, the front and rear rings of the ring belt facing forward and backward respectively, the tie string being a single string with a circular cross section, and the tie string being capable of forming a movable knot on each of the ring belts, when each of the movable knots forms a fastening adjustment state, the front tie string or the rear tie string of the tie string can continue to be pulled forward or backward respectively, and when each of the movable knots is in an adjustment stop state, the front tie string and the rear tie string are tightened toward the front and the rear respectively and are firmly tied to each of the ring belts, effectively solving the problem that traditional sandals cannot adjust the fastening in different areas. [Means for solving the problem]

[0007] In order to achieve the above object, the present invention provides an assembly-type lightweight sandal to be worn on the sole of a user, the lightweight sandal being divided into a front part, a rear part, an inner part and an outer part based on the sole of the user, the lightweight sandal including a sole, a front fixing structure, at least two straps and a tie string, the sole being divided into a front part, a middle part and a rear part based on the front and rear directions, having a front surface and a back surface, the front fixing structure being detachably attached to the front part of the sole, each of the straps being detachably attached to the surface of the sole, each of the The straps have a ring belt and a fixed end, the ring belt is located at the upper end of each of the straps, and the front and rear rings of the ring belt face the front and rear directions, respectively, the fixed end is located at the lower end of each of the straps opposite to the ring belt and fixed to the sole, the binding string is detachably attached to the sole and is a string having a circular cross section, the binding string forms a movable knot in each of the ring belts, and each of the movable knots is formed by first passing the binding string through each of the ring belts in the rear direction, and then moving the binding string to the rear direction. The binding string is wound back toward the outside, and finally, the binding string is passed through each of the ring belts in the rear direction to be tied to each of the ring belts, and the binding string that has passed through each of the ring belts first is pushed downward by the binding string that has passed back and formed a rear binding string, and the binding string pressed against the rear binding string forms a front binding string, and each of the movable knots is located in the outside range relative to the inside, and when each of the movable knots forms a tightening adjustment state, the front binding string or the rear binding string is pulled forward or backward, respectively. When each of the movable knots forms an adjustment stop state, the front binding string and the rear binding string are respectively tightened to the front and rear and bound to each ring belt. During assembly, the front fixing structure and each of the straps are first assembled to the sole, one end of the binding string is fixed to the front fixing structure, and after the fixing of one end of the binding string is completed, the other end passes through the ring belt of each of the straps from the front to the rear in sequence, and the binding string first forms each of the movable knots on the ring belt of each of the previous straps, and thenThe assembly of the lightweight sandals is completed by passing the binding string through the ring belts of the next straps and finally forming a fixed state in the binding string, and the portions of the binding string located between the front fixing structure and each of the movable knots, or the portions of the binding string between each of the movable knots, are used to fix the sole of the user to the surface of the sole, and in the tightness adjustment state, the length of the portions of the binding string between the front fixing structure and each of the movable knots, or the length of the portions of the binding string between each of the movable knots, can be shortened or increased, and in the adjustment stop state, the length of the portions of the binding string between the front fixing structure and each of the movable knots, or the length of the portions of the binding string between each of the movable knots can be fixed, which is advantageous in improving the market competitiveness of the product.

[0008] In one preferred embodiment of the present invention, the cross-sectional diameter of the binding string is 2 to 7 mm.

[0009] In one preferred embodiment of the present invention, the surface of the sole is further provided with a plurality of fastening grooves, and the front fastening structure and the fastening ends of each of the straps are provided in each of the fastening grooves of the sole.

[0010] In one preferred embodiment of the present invention, the sole is further provided with a plurality of through holes, and a locking portion is further provided at the bottom of the front fixing structure, and the front fixing structure passes through each of the through holes in the front part of the sole from bottom to top and is fixed to the sole by abutting against the outside of each of the through holes by the locking portion.

[0011] In a preferred embodiment of the present invention, the front, middle or rear part of the sole is further provided with a plurality of through holes, and the fixed end of each strap is a T-shaped abutment member formed by forming two straps into a T-shape and then using adhesive curing technology to form the two straps, and each strap passes through each of the through holes from bottom to top and abuts against the outside of each of the through holes by the T-shaped abutment member to be fixed to the sole.

[0012] In one preferred embodiment of the present invention, the front fixing structure further includes a front fixing strap, the front fixing strap includes a ring belt, and during assembly, the tie string forms a front fixing knot in the ring belt that previously fixes the strap to the front, and then passes to the rear, and the front fixing knot is located in the outer range relative to the inner range.

[0013] In one preferred embodiment of the present invention, the number of the straps of the lightweight sandals is three, and each of the straps is divided into a first strap, a second strap, and a third strap. After fixing one end of the binding string, the binding string is passed through the ring belt of the first strap to form the movable knot, then passed through the ring belt of the second strap to form the movable knot, then passed through the first through-ring of the external quick-insertion fastener, passed through the first through-ring to the ring belt of the third strap, and after forming the movable knot, passed through the second through-ring of the quick-insertion fastener to form the movable knot. The third strap is wound back onto the ring belt, and finally, a fixed state is formed in the portion of the tie string between the ring belt of the third strap and the first through ring, and the portion of the tie string between the ring belt of the third strap and the first through ring and the portion of the tie string between the ring belt of the third strap and the second through ring are used to secure the heel of a user, and the quick insert fastener can adjust the length of the portion of the tie string between the ring belt of the third strap and the first through ring, or the length of the portion of the tie string between the ring belt of the third strap and the second through ring.

[0014] In one preferred embodiment of the present invention, the number of straps of the lightweight sandals is two, and each strap is divided into a first strap and a second strap. The lightweight sandals further include a middle fastener, which is located in an upper space of the middle part of the sole. The middle fastener includes a ring belt, a first through ring, a receiving space, a fixing piece and a second through ring. The first through ring and the second through ring are connected to the receiving space. The fixing piece is located in the receiving space and between the first through ring and the second through ring. After fixing one end of the binding string, the binding string passes through the ring belt of the middle fastener to form the movable knot, and then passes through the ring belt of the first strap to form the movable knot, and then the binding string is passed through the second strap. The binding string is passed through the ring belt of the first strap from the rear to the front to form the movable knot, then the binding string is passed through the first through ring of the intermediate fastener and wound out of the intermediate fastener, then the binding string is passed through the second through ring of the intermediate fastener, and the binding string is extended out of the intermediate fastener and tightened to form a fixed state, at this time, the fixing piece in the storage space fixes the binding string inside the first through ring and the second through ring to the intermediate fastener, and a portion of the binding string between the ring belt of the first strap and the ring belt of the second strap is used to fix the heel of the user, and the intermediate fastener can adjust the length of the portion of the binding string between the ring belt of the second strap and the second through ring.

[0015] In one preferred embodiment of the present invention, the straps located at the rear of the sole are connected to form a single piece by an adjustable heel strap, which is used to secure the heel of the user.

[0016] In one preferred embodiment of the present invention, before the front fastening structure and each of the straps are assembled to the sole, adhesive is applied to the front fastening structure and each of the straps using further adhesive application techniques before they are assembled to the sole. [Brief description of the drawings]

[0017] [Figure 1] 1 is a perspective view of one embodiment of the present invention (lightweight sandals with heel straps). FIG. [Diagram 2] FIG. 2 is an exploded view of FIG. [Diagram 3] FIG. 2 is a view of FIG. 1 from a different angle. [Figure 4] FIG. 2 is a view of FIG. 1 from a different angle. [Diagram 5] FIG. 2 is a partial view of the binding string of the present invention in a tightening adjustment state. [Figure 6] FIG. 2 is a partial view of the binding string of the present invention when the adjustment is stopped. [Figure 7] FIG. 2 is a perspective view of another embodiment of the present invention (a lightweight sandal with a quick-insert fastener). [Figure 8] FIG. 8 is an explanatory diagram of FIG. 7 seen from a different angle. [Figure 9] FIG. 8 is an explanatory diagram of FIG. 7 seen from a different angle. [Figure 10] FIG. 8 is an explanatory diagram of FIG. 7 seen from a different angle. [Figure 11] FIG. 11 is a partially enlarged view of FIG. [Figure 12] FIG. 12 is an explanatory diagram of the quick insert type fastener of FIG. 11 in an unfastened state. [Figure 13] 1 is a perspective view of a lightweight sandal according to the present invention in use; FIG. [Figure 14] FIG. 2 is an explanatory diagram of the present invention showing the strap being inserted into the through hole from bottom to top. [Figure 15] FIG. 2 is a cross-sectional view of the binding cord of the present invention. [Figure 16] FIG. 2 is a perspective view of another embodiment of the present invention (a lightweight sandal with a mid-section fastener). [Figure 17] FIG. 17 is an explanatory diagram of FIG. 16 seen from a different angle. [Figure 18] FIG. 17 is an explanatory diagram of FIG. 16 seen from a different angle. [Figure 19] FIG. 2 is a partially enlarged perspective view of one angle of the intermediate fastener of the lightweight sandal of the present invention. [Figure 20] 20 is an explanatory diagram showing how the intermediate fastener of FIG. 19 is fastened in a fastened state. FIG. [Figure 21] FIG. 2 is an explanatory diagram showing the front fixing structure (having a locking portion) of the present invention being inserted into the through hole from bottom to top. [Figure 22] FIG. 2 is a perspective view of another embodiment of the present invention, a lightweight sandal with two straps. [Figure 23] FIG. 23 is an explanatory diagram of FIG. 22 seen from a different angle. [Figure 24] FIG. 23 is an explanatory diagram of FIG. 22 seen from a different angle. [Diagram 25] 1 is a perspective view showing another state of use of the lightweight sandals of the present invention. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] 1, 7, 16 and 22, the present invention provides a modular lightweight sandal 1, which is worn on the sole 2a of a user 2 as shown in FIG. 13 and FIG. 25, and the lightweight sandal 1 can be divided into a front 1a, a rear 1b, an inner 1c and an outer 1d based on the sole 2a of the user 2 (see FIG. 13 and FIG. 25) as shown in FIG. 1, and the lightweight sandal 1 includes a sole 10, a front fixing structure 20, at least two straps 30 and a tie string 40.

[0019] As shown in Figures 1 and 22 to 25, the sole 10 can be divided into a front portion 11, a middle portion 12, and a rear portion 13 based on the direction of the front 1a and the rear 1b, and the sole 10 has a front surface 14 and a back surface 15 as shown in Figures 1 to 4.

[0020] As shown in Figs. 1, 7, 16 and 22, the front fixing structure 20 is detachably provided on the front part 11 of the sole 10, and the user can disassemble it by himself and easily carry it.

[0021] As shown in Figs. 1, 7, 16 and 22, each strap 30 is detachably attached to the surface 14 of the sole 10, and a user can detach it and easily carry it with them. As shown in Fig. 14, each strap 30 has a ring belt 31 and a fixed end 32. The ring belt 31 is located at the upper end of each strap 30, and the front and rear rings of the ring belt 31 face the front 1a and rear 1b, respectively, as shown in Figs. 5 and 6, and the fixed end 32 is located at the lower end of each strap 30 with respect to the ring belt 31 and is fixed to the sole 10, as shown in Fig. 14.

[0022] The binding string 40 is detachably attached to the sole 10 as shown in Fig. 1, Fig. 7, Fig. 16 and Fig. 22, so that the user can disassemble the shoe and easily carry it. The binding string 40 is a single string having a circular cross section as shown in Fig. 15. The binding string 40 can form a movable knot 41 in each of the ring belts 31 as shown in Fig. 1. 5 and 6, each of the movable knots 41 is formed in such a manner that the binding cord 40 first passes through each of the ring belts 31 toward the rear 1b, then the binding cord 40 is unwound toward the outside 1d, and finally the binding cord 40 passes back through each of the ring belts 31 toward the rear 1b and is tied to each of the ring belts 31, the binding cord 40 that passed through each of the ring belts 31 first is pressed down by the binding cord 40 that returns later to form a rear binding cord 411, and the binding cord 40 pressed down by the rear binding cord 411 forms a front binding cord 412, and each of the movable knots 41 is located in the range of the outside 1d relative to the inside 1c, thereby avoiding discomfort to the user's feet. 5, when each of the movable knots 41 forms a tightening adjustment state, the front binding string 412 or the rear binding string 411 can continue to be pulled toward the front 1a (the direction of arrow A in FIG. 6) or the rear 1b (the direction of arrow B in FIG. 6), respectively. Referring to FIG. 6, when each of the movable knots 41 forms an adjustment stop state, the front binding string 412 and the rear binding string 411 are tightened toward the front 1a and the rear 1b, respectively, and are firmly tied to each of the ring belts 31.

[0023] 1, 7, 16 and 22, during assembly, first, the front fixing structure 20 and each of the straps 30 are assembled to the sole 10, then one end of the binding string 40 is fixed to the front fixing structure 20, and after the fixing of one end of the binding string 40 is completed, the other end is passed through the ring belts 31 of each of the straps 30 in sequence from the front 1a to the rear 1b, and the binding string 40 first forms each of the movable knots 41 in the ring belts 31 of the previous straps 30, then the binding string 40 is passed through the ring belts 31 of the next straps 30, and finally the binding string 40 is fixed to complete the assembly of the lightweight sandal 1.

[0024] As shown in Figures 13 and 25, a portion of the tie string 40 between the front fixing structure 20 and each of the movable knots 41, or a portion of the tie string 40 between each of the movable knots 41 fixes the sole 2a of the user 2 to the surface 14 of the sole 10.

[0025] When in the tightness adjustment state (see Figure 5), the length of the tie cord 40 in a portion between the front fixing structure 20 and each of the movable knots 41 can be shortened or increased, or the length of the tie cord 40 in a portion between each of the movable knots 41 can be shortened or increased (see Figure 1).

[0026] When in the adjustment stop state (the state shown in Figure 6), as shown in Figure 1, the length of a portion of the binding string 40 between the front fixing structure 20 and each of the movable knots 41, or the length of a portion of the binding string 40 between each of the movable knots 41 can be fixed.

[0027] Referring to FIG. 15, the cross-sectional diameter of the binding cord 40 is further 2 to 7 mm, but is not limited thereto, providing a comfortable fit for the user.

[0028] 2, the surface 14 of the sole 10 is further provided with, but not limited to, a number of fixing grooves 16. The front fixing structure 20 and the fixing ends 32 of the straps 30 are provided in the fixing grooves 16 of the sole 10, which helps the user to easily perform the assembly.

[0029] 21 , the sole 10 is further provided with a plurality of through holes 17, but is not limited thereto. The front fixing structure 20 is further provided with a locking portion 22 at a bottom thereof, but is not limited thereto. The front fixing structure 20 passes through each of the through holes 17 in the front part 11 of the sole 10 from bottom to top, and is fixed to the sole 10 by abutting the outside of each of the through holes 17 by the locking portion 22.

[0030] 2, the front portion 11, the middle portion 12, or the rear portion 13 of the sole 10 is further provided with a plurality of through holes 17. The fixed end 32 of each of the straps 30 is formed by forming two straps into a T-shape and forming a T-shaped abutment member 32a using an adhesive curing technique, but is not limited thereto (see FIG. 14). As shown in FIG. 14, each of the straps 30 passes through each of the through holes 17 from bottom to top, and abuts against the outside of each of the through holes 17 by the T-shaped abutment member 32a to be fixed to the sole 10.

[0031] 1, the front fixing structure 20 further includes, but is not limited to, a front fixing strap 21, and the front fixing strap 21 includes a ring belt 211. During assembly, the binding string 40 first further forms a front fixing knot 42 on the ring belt 211 of the front fixing strap 21, and then passes through the rear 1b, but is not limited to this, and the front fixing knot 42 is located within the range of the outer 1d relative to the inner 1c.

[0032] Referring to the embodiment shown in Figures 7 to 10, the number of straps 30 of each of the lightweight sandals 1 is three, but this is not limited to this, and each of the straps 30 may be further divided into a first strap 30a, a second strap 30b and a third strap 30c. After completing the fixation of one end of the binding string 40, the binding string 40 passes through the ring belt 31 of the first strap 30a to form the movable knot 41, passes through the ring belt 31 of the second strap 30b to form the movable knot 41, then the binding string 40 passes through the first through ring 51 of the quick insert type fastener 50 of the exterior 1d, the binding string 40 passes from the first through ring 51 to the ring belt 31 of the third strap 30c to form the movable knot 41, then the binding string 40 passes through the second through ring 52 of the quick insert type fastener 50 and rewinds back to the ring belt 31 of the third strap 30c, and finally, the binding string 40 forms a fixed state with a portion of the binding string 40 between the ring belt 31 and the first through ring 51 of the third strap 30c (see FIG. 13). Referring to Figure 10, the length of the binding cord 40 of a portion between the ring belt 31 and the second through ring 52 of the third strap 30c, or the length of the binding cord 40 of a portion between the ring belt 31 and the second through ring 52 of the third strap 30c can be adjusted.

[0033] Referring to Figures 11 and 12, the quick insert fastener 50 can be fastened or released according to the needs of the user, and the application of the quick insert fastener 50 is a conventional common technology, so it will not be described in detail here.

[0034] 16 to 18, the number of straps 30 of the lightweight sandal 1 is two, but not limited thereto, and each strap 30 may be further divided into a first strap 30a and a second strap 30b. Referring to Figs. 19 and 20, the lightweight sandal 1 further has a middle fastener 60, which is located in the upper space of the middle part 12 of the sole 10, and which has a ring belt 61, a first through ring 62, a storage space 63, a fixing piece 64, and a second through ring 65, and the first through ring 62 and the second through ring 65 communicate with the storage space 63, and the fixing piece 64 is located in the storage space 63 and between the first through ring 62 and the second through ring 65. Referring to FIG. 16, after completing the fixing of one end of the binding cord 40, the binding cord 40 further passes through the ring belt 61 of the intermediate fastener 60 to form the movable knot 41, and then passes through the ring belt 31 of the first strap 30a to form the movable knot 41. Thereafter, the binding cord 40 passes through the ring belt 31 of the second strap 30b from the rear 1b to the front 1a from rear to front to form the movable knot 41. The binding cord 40 passes through the first through ring 62 of the intermediate fastener 60 and is then unwound out of the intermediate fastener 60. Thereafter, the binding cord 40 passes through the second through ring 65 of the intermediate fastener 60 (see FIG. 19), and the binding cord 40 is extended out of the intermediate fastener 60 and tightened (in the direction of arrow C in FIG. 20) to form a fixed state. At this time, the fixing piece 64 in the receiving space 63 firmly positions the binding string 40 inside the first through ring 62 and the second through ring 65 to the middle fastener 60 (see FIG. 20). A part of the binding string 40 between the ring belt 31 of the first strap 30a and the ring belt 31 of the second strap 30b is used to fasten the heel of the user. The middle fastener 60 can adjust the length of the part of the binding string 40 between the ring belt 31 of the second strap 30b and the second through ring 65 as shown in FIG. 16.

[0035] Referring to the embodiment shown in Figures 1 to 4, each of the straps 30 of the rear portion 13 of the sole 10 is integrally connected to a heel strap 70 whose length is adjustable, but is not limited thereto, and the heel strap 70 is used to secure the heel of the user.

[0036] Referring to Figures 1, 7, 16 and 22, before assembling the front fixing structure 20 and each of the straps 30 to the sole 10, the front fixing structure 20 and each of the straps 30 are further bonded to each other using an adhesive application technique, and then assembled to the sole 10, thereby making the bond between the structures stronger.

[0037] In summary, the binding strings of conventional sandals are not designed to adjust the tightness partially or regionally, that is, it is not possible to adjust each region of the foot, such as the width of the forefoot sole or the thickness of the instep, but only to adjust the tightness of the entire foot at one time. However, when the lightweight sandals 1 of the present invention are in the tightness adjustment state (see FIG. 5), the length of the binding string 40 between the front fixing structure 20 and each of the movable knots 41 or the length of the binding string 40 between each of the movable knots 41 can be shortened or increased (see FIG. 1), and when the lightweight sandals 1 of the present invention are in the adjustment state (see FIG. 6), the length of the binding string 40 between the front fixing structure 20 and each of the movable knots 41 or the length of the binding string 40 between each of the movable knots 41 can be fixed (see FIG. 1), that is, the lightweight sandals 1 of the present invention can adjust each region of the foot, such as the width of the forefoot sole or the thickness of the instep, which is advantageous to improving the market competitiveness of the product.

[0038] In addition, in the present invention, each of the movable knots 41 is formed as follows: the binding cord 40 first passes through each of the ring belts 31 in the direction of the rear 1b, then the binding cord 40 is unwound to the outside 1d, and finally the binding cord 40 returns in the direction of the rear 1b and passes through each of the ring belts 31 to be tied to each of the ring belts 31; the binding cord 40 that passed through each of the ring belts 31 first is pressed down by the binding cord 40 that passed later to form the rear binding cord 411; the binding cord 40 pressed by the rear binding cord 411 forms the front binding cord 412; and each of the movable knots 41 is located within the range of the outside 1d relative to the inside 1c. 5, when each of the movable knots 41 forms the tightening adjustment state, the front binding cord 412 or the rear binding cord 411 can continue to be pulled toward the front 1a (the direction of arrow A in FIG. 6) or the rear 1b (the direction of arrow B in FIG. 6), respectively. As shown in FIG. 6, when each of the movable knots 41 forms the adjustment stop state, the front binding cord 412 and the rear binding cord 411 are tightened toward the front 1a and the rear 1b, respectively, and are firmly tied to each of the ring belts 31. That is, the lightweight sandals 1 of the present invention do not need to use additional structures (such as clasps or tie pieces) that serve as nodes for adjusting the tightening of the binding cord, but use the special tying method disclosed above of the binding cord 40 of the present invention, that is, only one binding cord can be used to complete the installation of each knot for adjusting the tightening of the binding cord, which is advantageous for saving manufacturing costs.

[0039] Although the preferred embodiments of the present invention have been disclosed as described above, they are by no means intended to limit the present invention, and it goes without saying that anyone familiar with the art can make various modifications and embellishments within the scope of the spirit and scope of the present invention. [Explanation of symbols]

[0040] 1. Lightweight Sandals 1a forward 1b rear 1c internal 1d External 10 soles 11 Front 12 Middle section 13 Rear 14 Surface 15 Back side 16 Fixed groove 17 Through hole 20 Front fixed structure 21 Front fixing strap 211 Ring Belt 22 Locking part 30 Straps 30a 1st Strap 30b Second Strap 30c 3rd Strap 31 Ring Belt 32 Fixed end 32a T-shaped abutting member 40 Binding string 41 Movable Knot 411 Rear tie string 412 Front tie string 42 Front fixed knot 50 Quick Insert Fastener 51 1st through ring 52 2nd through ring 60 Middle fastener 61 Ring Belt 62 1st through ring 63 Storage space 64 Fixed piece 65 2nd through ring 70 Heel Strap 2. Users 2a Sole of the foot 2b heel

Claims

1. A self-assembly type lightweight sandal to be worn on a sole of a user, the lightweight sandal being divided into a front part, a rear part, an inner part and an outer part based on the sole of the user's foot, the lightweight sandal including a sole, a front fixing structure, at least two straps and a tie string; The sole is divided into a front part, a middle part, and a rear part based on the forward and rear directions, and has a front surface and a back surface; The front fixing structure is detachably provided to the front part of the sole, The at least two straps are each detachably attached to the surface of the sole, each strap having a ring belt and a fixed end, the ring belt being located at an upper end of each strap and front and rear rings of the ring belt facing the front and rear, respectively, the fixed end being located at a lower end of each strap opposite to the ring belt and fixed to the sole; The binding string is detachably attached to the sole and is a string having a circular cross section. The binding string forms a movable knot on each of the ring belts, and each of the movable knots is formed by first passing the binding string through each of the ring belts in the rear direction, and then unwinding the binding string toward the outside. Finally, the binding string is passed through each of the ring belts in the rear direction to be tied to each of the ring belts, and the binding string that has passed through each of the ring belts first is pushed by the binding string that has passed back. the fastening strap is lowered to form a rear fastening strap, the fastening strap pressed against the rear fastening strap forms a front fastening strap, and each of the movable knots is located in the outer range relative to the inner range, when each of the movable knots forms a tightness adjustment state, the front fastening strap or the rear fastening strap can continue to be pulled forward or backward, respectively, when each of the movable knots forms an adjustment stop state, the front fastening strap and the rear fastening strap are respectively pulled forward and backward to be fastened to each of the ring belts, During assembly, first, the front fixing structure and each of the straps are assembled to the sole, one end of the binding string is fixed to the front fixing structure, and after the fixing of one end of the binding string is completed, the other end is passed through the ring belts of each of the straps from the front to the rear in sequence, and the binding string first forms each of the movable knots in the ring belts of the previous straps, and then passes through the ring belts of the next straps, and finally the binding string is fixed to complete the assembly of the lightweight sandal. A portion of the tie string located between the front fixing structure and each of the movable knots, or a portion of the tie string between each of the movable knots is used to fix the sole of the user's foot to the surface of the sole, In the tightness adjustment state, the length of the tie cord in a portion between the front fixing structure and each of the movable knots, or the length of the tie cord in a portion between each of the movable knots can be shortened or increased, The lightweight sandals can fix the length of the tie strings in a portion between the front fixing structure and each of the movable knots, or in a portion between the movable knots, when the adjustment is stopped.

2. The lightweight sandal according to claim 1, wherein the cross-sectional diameter of the binding string is 2 to 7 mm.

3. The lightweight sandal according to claim 1 , wherein the surface of the sole is further provided with a plurality of fastening grooves, and the front fastening structure and the fastening ends of each of the straps are provided within each of the fastening grooves of the sole.

4. The lightweight sandal of claim 1, wherein the sole is further provided with a plurality of through holes, and the bottom of the front fixing structure is further provided with a locking portion, and the front fixing structure passes through each of the through holes in the front part of the sole from bottom to top and is fixed to the sole by abutting against the outside of each of the through holes by the locking portion.

5. 2. The lightweight sandals according to claim 1, wherein the front, middle or rear part of the sole is further provided with a plurality of through holes, and the fixed end of each strap is a T-shaped abutment member formed by forming two straps into a T-shape and then using adhesive curing technology to form the two straps, and each strap passes through each of the through holes from bottom to top and is fixed to the sole by abutting against the outside of each of the through holes by the T-shaped abutment member.

6. The lightweight sandals of claim 1, wherein the front fixing structure further includes a front fixing strap, the front fixing strap includes a ring belt, and when assembled, the tie string forms a front fixing knot in the ring belt that previously fixes the strap to the front, and then passes to the rear, and the front fixing knot is located in the outer range relative to the inner range.

7. The number of the straps of the lightweight sandals is three, and each of the straps is divided into a first strap, a second strap, and a third strap. After fixing one end of the binding string, the binding string is passed through the ring belt of the first strap to form the movable knot, then passed through the ring belt of the second strap to form the movable knot, then passed through the first through ring of the external quick insert fastener, passed through the first through ring to the ring belt of the third strap, and after forming the movable knot, passed through the second through ring of the quick insert fastener to form the movable knot of the third strap.

2. The lightweight sandals according to claim 1, wherein the fastener is wound around the third strap and wound around the first through ring, and finally, a fixed state is formed in the fastener at a portion of the fastener between the ring belt and the first through ring of the third strap, and the fastener at a portion of the fastener between the ring belt and the second through ring of the third strap is used to fasten a heel of a user, and the quick insert fastener can adjust the length of the fastener at a portion of the fastener between the ring belt and the first through ring of the third strap, or the length of the fastener at a portion of the fastener between the ring belt and the second through ring of the third strap.

8. The number of straps of the lightweight sandals is two, and each strap is divided into a first strap and a second strap. The lightweight sandals further include a middle fastener, which is located in an upper space of the middle part of the sole. The middle fastener includes a ring belt, a first through ring, an accommodation space, a fixing piece and a second through ring. The first through ring and the second through ring are connected to the accommodation space. The fixing piece is located in the accommodation space and between the first through ring and the second through ring. After fixing one end of the binding string, the binding string passes through the ring belt of the middle fastener to form the movable knot, and then passes through the ring belt of the first strap to form the movable knot. Then, the binding string is attached to the ring belt of the second strap at the rear.

2. The lightweight sandals according to claim 1, wherein the fastener is passed from the first through-ring to the front from the back to the front to form the movable knot, then the fastener is passed through the first through-ring of the intermediate fastener and wound out of the intermediate fastener, then the fastener is passed through the second through-ring of the intermediate fastener, and the fastener is stretched out of the intermediate fastener and tightened to form a fixed state, at this time, the fixing piece in the storage space fixes the fastener inside the first through-ring and the second through-ring to the intermediate fastener, a part of the fastener between the ring belt of the first strap and the ring belt of the second strap is used to fix the heel of the user, and the intermediate fastener can adjust the length of the part of the fastener between the ring belt of the second strap and the second through-ring.

9. The lightweight sandal according to claim 1, wherein the straps located at the rear of the sole are connected to each other by an adjustable heel strap to form a single body, and the heel strap is used to secure the heel of a user.

10. The lightweight sandal of claim 1, wherein before the front fixing structure and each of the straps are assembled to the sole, adhesive is applied to the front fixing structure and each of the straps using an adhesive application technique, and then the front fixing structure and each of the straps are assembled to the sole.

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