TW202019310A - Strap securing component of footwear - Google Patents

Abstract

A flip-flop structure is disclosed. The flip-flop structure includes a sole structure having an upper surface and a lower surface, an aperture penetrating through the sole structure and exposing an engaging surface between the upper surface and the lower surface of the sole structure. A strap secured on the upper surface of the sole structure, wherein the strap includes a joint part having a widen portion and a pillar portion joined on a top surface of the widen portion, wherein the top surface of the widen portion has a plurality of protrusions and is in direct contact with the engaging surface.

Description

Strip fixing structure of slippers

The invention relates to slippers, and in particular to a strap fixing structure of slippers.

Slippers are a kind of footwear consisting of combining straps on the sole of the shoe. The straps are tied to the wearer's foot to complete the fixing between the slippers and the foot, and the sole can be interposed between the sole and the ground to avoid The sole of the wearer's feet directly touches the ground to protect the feet and also increase the comfort during activities. Slippers have been widely used in everyday homes or occasions requiring temporary putting on and taking off, such as hospitals, hotels, beaches, etc., because they are easy to put on and take off, cool and breathable, simple in structure and easy to clean.

A pair of flip-flops is a kind of slippers including a Y-shaped strap, which fixes a clamping rod portion of the Y-shaped strap to the front position of the sole corresponding to the wearer's thumb and second toe, and the strap portions on both sides, respectively It is fixed on both sides of the sole corresponding to the arch of the wearer's foot and the side of the foot. Generally speaking, the end of the Y-shaped strip will be provided with a buckle body. The buckle body is fixed on the sole by using the puncture body through the perforation penetrating the sole and blocking the buckle body with the perforation.

In order to improve the comfort when wearing and reduce the manufacturing cost, the soles and laces of slippers are usually made of plastics that are easy to process and have elasticity or softness, such as ethylene vinyl acetate (EVA), rubber (rubber), polyvinyl chloride Ethylene (PVC) or thermoplastic elastomer (TPE), etc. However, the elastic plastic allows deformation when subjected to pressure, which makes the buckle of the shoelace easy to loosen from the perforation of the sole during the activity of the wearer, which may cause the wearer to fall, causing safety concerns.

In order to solve the above problem, the present invention provides a strap fixing structure for slippers, which can make the strap more firmly combined on the sole of the shoe, is not easy to loosen, and improves the comfort and safety when wearing.

The slippers provided according to an embodiment of the present invention include a sole having an upper surface and a lower surface; a perforation penetrating the sole and revealing a fitting surface between the upper surface and the lower surface; a belt, Located on the upper surface of the shoe sole, wherein the strip includes a fitting head assembled in the perforation, wherein the fitting head includes a fitting block and a fitting post engaged on a top surface of the fitting block, The top surface includes a plurality of tooth points and is in direct contact with the fitting surface.

The present invention is characterized in that by providing these tooth points on the top surface directly in contact with the fitting surface, the friction between the fitting surface and the top surface can be increased, so that the assembly of the fitting head and the sole on the strap is subjected to The pulling force away from the upper surface direction is less likely to slip off, so it can have a more stable combination structure of the strap and the sole. In addition, the fitting head with tooth points provided by the present invention can be integrally formed with other parts of the strap by injection molding technology, which can effectively improve the problem of the strap loosening from the sole without increasing cost and manufacturing steps .

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments are described in detail below in conjunction with the accompanying drawings. The drawings are schematic diagrams, not drawn to scale, and the same or similar features are usually described with the same reference signs. The embodiments and drawings described herein are for reference and explanation only, and are not intended to limit the present invention. The scope of the invention is defined by the scope of patent application. Those with the same meaning as the patent application scope of the present invention shall also fall within the scope of the present invention.

The following embodiments are described with slippers with herringbone straps. It should be understood that slippers with herringbone straps are one of many embodiments of the present invention, and the strap fixing structure of the slippers provided by the present invention can also be used It can be used in other types of slippers, such as one-piece slippers, or can be used to fix other footwear components on the sole.

Please refer to Figure 1 and Figure 2. FIG. 1 is a combined perspective view of slippers 10 according to an embodiment of the present invention, and FIG. 2 is an exploded perspective view of slippers 10. As shown in FIG. 1, the slippers 10 are, for example, flip-flops, mainly composed of a sole 12 and a herringbone strip 20. The sole 12 may have a flat sheet shape, including an upper surface 14 facing the wearer's sole and a lower surface 16 facing the ground. The upper surface 14 and the lower surface 16 may have design patterns and textures, respectively, which are not shown in detail here in order to simplify the illustration. The strap 20 is provided on the upper surface 14 of the sole 12 and includes a clamping rod portion 22 fixed to the front position 12a between the wearer's thumb and second toe, and the clamping rod portion 22 is directed to both sides The two side belt portions 24 that extend and are fixed to the sole 12 corresponding to the wearer's arch and side positions 12b on both sides of the foot, respectively. As shown in FIG. 2, the end portions of the clamping rod portion 22 and the side belt portion 24 of the strap 20 are each provided with a fitting head 26. Each fitting head 26 passes through the perforation 18 penetrating through the sole 12 from the upper surface 14 to utilize the perforation The stopper 18 retracts the fitting head 26 and fixes the strap 20 to the upper surface 14 side of the sole 12.

According to an embodiment of the present invention, the strip 20 is preferably made of an elastic and tough plastic or composite material, such as polyvinyl chloride (PVC) or thermoplastic elastomer (TPE), but is not limited thereto. The whole strip 20 may be formed by injection molding technology, for example, the molten plastic is injected into a lower mold, and then an upper mold is pressed onto the lower mold, and the plastic is formed after cooling.

According to an embodiment of the present invention, the sole 12 is preferably made of an elastic and tough plastic or composite material, for example, it may include ethylene vinyl acetate (EVA), natural or synthetic rubber (Rubber), polyurethane (PU), poly Vinyl chloride (PVC), thermoplastic polyurethane (TPU), thermoplastic rubber (TPR), polyethylene (PE), etc., but not limited thereto. Preferably, the sole 12 is made of foamed material, such as foamed EVA, foamed TPU or foamed rubber. On the one hand, it can reduce the weight and improve the wearing comfort. On the other hand, it can also reduce the use of plastics and protect the environment. According to an embodiment of the present invention, the manufacturing method of the sole 12 is, for example, to put the raw plastic or rubber compounded into the kneader (inner mixer) for kneading at a predetermined temperature first, and then to be kneaded in the kneader The plastic is in a molten state, and then add chemical additives or modifiers such as foaming agent, cross-linking agent, activator, lubricant, etc. into the kneader, mix it evenly with the molten plastic, and then discharge to open The thinner of the mixer is made many times, and then the material is cut by the discharge machine into films that meet the specifications of the mold. Subsequently, the film is loaded into a mold for vulcanization, and after a predetermined vulcanization time, the mold is opened to take out the sole product. The sole 12 may have a single-layer or multi-layer structure according to the requirements of function, comfort, durability and the like.

Please refer to FIG. 3, which is an enlarged schematic view of the fitting head 26 according to an embodiment of the invention. The fitting head 26 may include a fitting post 262 and a fitting block 264, one end of the fitting post 262 is joined to the top surface 266 of the fitting block 264, and the other end is connected to other components of the strap 20, for example, FIG. 2 The clamp rod portion 22 or the side strap portion 24 is shown. In the above embodiment, the fitting post 262 is cylindrical, and the fitting block 264 is disc-shaped, and the diameter of the fitting post 262 needs to be smaller than the diameter of the fitting head 26 to expose the portion of the fitting head 26 Top surface 266. According to an embodiment of the present invention, the fitting post 262 is substantially joined to the middle portion of the top surface 266 of the fitting block 264, so that the fitting head 26 has an inverted T-shaped cross-sectional shape, so as to be compatible with the inverted T-shaped (refer to FIG. 4 ) Combined with the perforation 18 to produce the function of stopping and limiting the back. It is worth noting that the part of the top surface 266 of the fitting block 264 that is not engaged with the fitting post 262 is provided with a plurality of protruding granular tooth points 268, which can be evenly distributed on the top surface 266, or The density is higher in the area close to the fitting post 262 and lower in the area away from the fitting post 262 (or vice versa). In addition, the tooth points 268 may also be arranged in a specific pattern, for example, arranged radially with the fitting post 262 as the center, or arranged in one or more concentric circles with the fitting post 262 as the center. In other unillustrated embodiments of the present invention, the tooth points 268 may also be at least partially connected to form a plurality of line segment patterns or a ring pattern surrounding the fitting post 262. According to an embodiment of the present invention, the fitting post 262, the fitting block 264 and the tooth point 268 can be integrally formed with other components of the strap 20 by injection molding technology without increasing the manufacturing steps and costs. The tooth point 268 may be tapered as shown in the figure, such as a cone, a triangular cone, or a square cone, or may be a block with a flat top surface, such as a cylinder, a triangular column, or a polygonal column. According to an embodiment of the present invention, the diameter ratio of the fitting post 262 to the fitting block 264 is about 1 to 1.5 to 1 to 3, for example, when the diameter of the fitting post 262 is between 4 and 6 mm, the fitting block The diameter of 264 is between 6 and 18 mm. Preferably, the diameter of the fitting post 262 is about 5 mm, and the diameter of the fitting block 264 is about 15 mm. The height of the tooth point 268 protruding from the top surface 266 may be between 0.5 mm and 1.5 mm, preferably about 1 mm.

Please refer to Figure 4 and Figure 5. The upper part of Fig. 4 is a perspective view looking down from the lower surface 16 side of the sole 12, and the lower part of Fig. 4 is a schematic cross-sectional view of the through hole 18 cut along the line A-A' in the perspective view. The through hole 18 includes a slot hole 182 exposed on the upper surface 14 and a receiving hole 184 exposed on the lower surface 16 and communicating with the slot hole 182. The slot hole 182 and the accommodating hole 184 preferably have shapes corresponding to the fitting post 262 and the fitting block 264, for example, cylindrical holes or disc holes. The diameter of the slot hole 182 needs to be smaller than the diameter of the accommodating hole 184, so as to form a fitting surface 186 at the end of the accommodating hole 184 connected to the slot hole 182. As shown in FIG. 4, the slot hole 182 is substantially aligned with the center of the receiving hole 184 so that the through hole 18 has an inverted T-shaped cross-sectional shape.

Please refer to FIG. 5 and FIG. 5A, which are schematic cross-sectional views of the fitting head 26 fitted in the perforation 18 of the sole 12. The method of fitting the fitting head 26 into the perforation 18 is, for example, to allow deformation when the fitting head 26 and the sole 12 are pressed, and squeeze the fitting head 26 from the upper surface 14 of the sole 12 into the perforation 18 of the sole 12 Through the stop between the top surface 266 of the fitting block 264 and the fitting surface 186 of the sole 12, the fitting head 26 will not slip off from the perforation 18. As shown in FIG. 5A, when the wearer is moving, a pulling force 270 is applied to the strip 20 away from the upper surface 14, pulling the top surface 266 toward the engagement surface 186 and directly pressing the engagement surface 186. Due to the allowable deformation of the sole 12 when compressed, the tooth points 268 of the top surface 266 can at least partially sink into the sole 12 and engage with the sole 12, thereby increasing the contact area and friction force between the top surface 266 and the fitting surface 186 , The fitting head 26 is less likely to slip off from the perforation 18, so it can have a more stable combination structure of the strap 20 and the sole 12.

單位: 公斤(Kg)The following table 1 is the experimental data of the vertical tensile test of the strap fixing structure according to an embodiment of the invention. The test method is to first combine the fitting head of one end of the strap into the perforation of the sole, and then fix the sole on the base of the tension machine, and fix the other end of the strap with a clamp, and then start the tension machine to make the clamp vertical And pull away from the direction of the shoe sole until the reaction force between the base and the fixture is detected to be loosened, and the value of the tensile force is recorded, which is the maximum tensile force value. Test 1, Test 2, and Test 3 are to combine the fitting head on three different joints of the first sample sole for testing, and Test 4, Test 5, and Test 6 are to combine the fitting head on a second The three different joints of the sample sole were tested. The difference between the first sample sole and the second sample sole is that it is made of different materials and can have different elasticity or softness. The three different junctions are, for example, the front position 12a and the two side positions 12b on both sides as shown in FIG. The average test values in columns B and D of Table 1 are the average of tests 1 to 3 or 4 to 6. From columns E and F of Table 1, it can be seen that the fitting head with tooth points has an average tensile strength of up to 3 kg compared to the fitting head without tooth points, and the overall tensile force has increased by about 20 to 30 percent on average. Has made significant progress. Table I

Unit: Kilogram (Kg)

According to the tensile test of another embodiment of the present invention, a standard tensile force value, for example, 11.3 kg, may be set in advance. When the tensile strength between the two fixtures reaches the standard tensile force value, if the combination of the sole and the shoelace has not been loosened, It means that the strap fixing structure has passed the tensile test. Conversely, if it has been loosened before reaching the specified tension value, it means that the strap fixing structure has failed the tension test. The above process can obtain the product yield data of the strip fixed structure. Returning to Table 1, the tensile values of Test 1 to Test 6 with toothed fitting heads are all greater than 11.3 kg, and all passed the tensile test. In contrast, in the test of the toothless fitting head, the tensile value of Test 2 and Test 3 was less than 11.3 kg, and failed the tensile test. It can be seen from this that the use of a strap fixing structure with a toothed fitting head can ensure that the slippers products can have a higher yield in the strap tension test.

Please refer to Figure 6. The shape of the fitting block 264 of the present invention is not limited to the disc shape described in FIG. 3, but may be other different shapes, such as a square shown on the left side of FIG. 6, an oval shape shown in the middle of FIG. 6, Or the polygon drawn on the right side of Figure 6, etc., but not limited to this. Similarly, the shape of the fitting column 262 is not limited to the cylindrical shape described in FIG. 3, and may have other different shapes, such as a square column type, an elliptical column type, a polygonal column, etc. Draw. The shape of the through hole 18 can be adjusted according to the shape of the fitting block 264 and/or the fitting post 262. For example, when the fitting block 264 is square, the receiving hole 184 of the through hole 18 can have a square opening shape.

In summary, the strap fixing structure of the slippers provided by the present invention can overcome the problem that the strap loosens from the sole and improves the stability when wearing. In addition, with the growing awareness of environmental awareness, biodegradable materials have been developed to make shoe soles, such as biodegradable PVC or biodegradable EVA. Because the sole made of biodegradable material is softer and more deformable than the sole made of general plastic material, the probability of loosening the strap is therefore higher. The strap fixing structure provided by the present invention can effectively solve the problem of strip looseness without increasing the complexity and cost of the manufacturing process, and has substantial benefits for applying biodegradable materials in the technical field. The above are only the preferred embodiments of the present invention, and all changes and modifications made in accordance with the patent application scope of the present invention shall fall within the scope of the present invention.

10: Slippers 12: Sole 12a: Front side position 12b: Both side positions 14: Upper surface 16: Lower surface 18: Perforation 182: Slot hole 184: Receiving hole 186: Mating surface 20: Strip 22: Clip lever part 24: side belt part 26: fitting head 262: fitting post 264: fitting block 266: top surface 268: tooth point A-A': tangent

Figure 1 is an assembled perspective view of slippers according to an embodiment of the invention. Figure 2 is an exploded perspective view of a slippers according to an embodiment of the invention. Figure 3 is a perspective view of a fitting head according to an embodiment of the invention. FIG. 4 is a schematic cross-sectional view of a perforation of a shoe sole according to an embodiment of the invention. Figures 5 and 5A are schematic cross-sectional views of a combined fitting head and sole perforation according to an embodiment of the present invention. Figure 6 illustrates other shapes of the fitting head of the present invention.

12: sole

14: upper surface

16: Lower surface

18: Perforation

182: Slot hole

184: accommodating hole

186: fitting surface

262: Chimeric column

264: mosaic block

266: top surface

268: tooth point

Claims (10)

A slippers, comprising: a sole having an upper surface and a lower surface; a perforation penetrating the sole and revealing a fitting surface between the upper surface and the lower surface; and a strap located on the sole The upper surface, wherein the strip includes a fitting head assembled in the perforation, the fitting head includes a fitting block and a fitting post engaged on a top surface of the fitting block, the The top surface contains a plurality of tooth points and is in direct contact with the fitting surface. As in the slippers described in item 1 of the patent application scope, the perforation includes a slot hole exposed on the upper surface and a receiving hole communicating with the slot hole and exposed on the lower surface, the fitting surface is located on the insert Between the slot hole and the accommodating hole. The slippers as described in item 1 of the patent application range, wherein the fitting post is joined to the middle portion of the top surface of the fitting block, and the fitting head has an inverted T-shaped cross-sectional shape. The slippers as described in item 1 of the patent application, wherein the perforation has an inverted T-shaped cross-sectional shape. The slippers as described in item 1 of the patent application scope, wherein the fitting block is disc-shaped. The slippers as described in item 1 of the patent application scope, wherein the strap and the fitting head are integrally formed. The slippers as described in item 1 of the patent application scope, wherein the strap is a Y-shaped strap, including a clamping rod portion defined at a front side position of the sole, and both side strap portions are respectively defined at both side positions of the sole . The slippers as described in item 1 of the scope of the patent application, wherein the plurality of tooth points are evenly distributed in the area where the top surface is not engaged with the fitting post. As in the slippers described in item 1 of the patent application, the sole material includes foamed EVA or foamed rubber. The slippers as described in item 1 of the patent application scope, wherein the material of the strip includes PVC.

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