Injection molded shoe midsole

Abstract

The utility model relates to the technical field of shoe sole, especially a injection shoe middle sole, including the heel body and the forefoot body of injection moulding in the heel body one end, the forefoot body adopts the elastic plastic material, the heel body adopts the hard plastic material, one end that the heel body is connected with the forefoot body is equipped with the first inclined plane, recessed has a plurality of injection moulding holes on the first inclined plane, be equipped with the second inclined plane with the first inclined plane adaptation on the forefoot body, the second inclined plane is protruding and has a plurality of injection moulding bodies with injection moulding hole adaptation, the utility model discloses through setting up the inclined plane and the injection moulding hole for the injection moulding material flow, has increased the connecting area of forefoot body and heel body, and the connection is more firm, and it is not easy to break.

Description

Technical Field

[0001] This utility model relates to the field of shoe sole technology, and in particular to an injection-molded shoe midsole. Background Technology

[0002] The midsole is a sandwich structure located between the upper and the outsole, which undertakes the core functions of cushioning, rebound and support. Its materials and processes directly affect athletic performance.

[0003] Patent CN203314219U discloses a high-heeled shoe midsole with a soft forefoot flexing section, including a hard midsole body and a forefoot body with moderate softness and hardness injection molded together with the midsole body. A soft flexing section is also injection molded on the forefoot body. This solution obtains a shoe midsole with a soft and comfortable forefoot and a hard and load-bearing heel by using plastic materials of different hardness through multiple injection molding processes, thereby improving wearing comfort.

[0004] However, further investigation revealed the following problems with the above solution: the forefoot and the midsole are injection molded together, resulting in a small contact area between them, which leads to an insufficiently strong connection. When walking in shoes with this type of midsole, the forefoot will bend repeatedly, and the forefoot and the midsole are prone to breakage. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings and deficiencies of the existing technology and to provide an injection-molded shoe midsole. This invention increases the connection area between the forefoot and heel by setting an inclined surface and an injection hole for the injection material to flow in, making the connection more solid and less prone to breakage.

[0006] The technical solution adopted by this utility model is as follows: an injection-molded shoe midsole, including a heel body and a forefoot body injection-molded at one end of the heel body. The forefoot body is made of elastic plastic material, and the heel body is made of hard plastic material. The end of the heel body connected to the forefoot body is provided with a first inclined surface. A plurality of injection holes are recessed on the first inclined surface. The forefoot body is provided with a second inclined surface adapted to the first inclined surface. A plurality of injection bodies adapted to the injection holes are protruding on the second inclined surface.

[0007] The heel body is also provided with a third inclined surface, and a corner block is formed between the first inclined surface and the third inclined surface. The forefoot body is also provided with a fourth inclined surface that is adapted to the third inclined surface, and a corner groove is formed between the second inclined surface and the fourth inclined surface for the corner block to be inserted and fitted.

[0008] A plurality of injection holes are evenly distributed laterally on the first inclined surface, each injection hole penetrates the third inclined surface along the first inclined surface, and each injection body is connected to the fourth inclined surface along the second inclined surface.

[0009] The forefoot also has a recessed groove on its end face, and the groove has several rows of evenly distributed wave patterns protruding from it.

[0010] It also includes a bent sheet made of elastic plastic material, which covers the wavy texture by bonding it to the inner circumference of the groove.

[0011] The bent piece is provided with several sets of holes, and each set of holes includes several strip-shaped holes that are evenly distributed laterally.

[0012] The strip holes in each pair of adjacent groups of holes are staggered.

[0013] The beneficial effects of this utility model are as follows: The heel body and the forefoot body in this utility model are connected by the first inclined surface and the second inclined surface, which significantly increases the contact area between the forefoot body and the heel body, thereby improving the connection strength. The interlocking structure of the injection hole and the injection body further strengthens the interface bonding force, effectively avoiding the problem of loosening or breaking at the connection due to repeated bending during walking, improving the overall durability and service life of the shoe midsole. The structure of the inclined surface also makes the stress evenly distributed at the connection, reducing local stress concentration and further reducing the risk of fatigue fracture. Attached Figure Description

[0014] 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, obtaining other drawings based on these drawings without creative effort still falls within the scope of this utility model.

[0015] Figure 1 This is a schematic diagram of the structure of an injection-molded shoe midsole according to the present invention; Figure 2 This is an exploded view of the present invention; Figure 3 This is a schematic diagram of the structure of the heel body in this utility model; Figure 4 This is a schematic diagram of the forefoot body in this utility model; In the figure, 1-heel body, 2-forefoot body, 3-first inclined surface, 4-injection hole, 5-second inclined surface, 6-injection body, 7-third inclined surface, 8-corner block, 9-fourth inclined surface, 10-corner groove, 11-groove, 12-wavy pattern, 13-bending piece, 14-hole section, 15-strip hole. Detailed Implementation

[0016] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0017] It should be noted that all uses of "first" and "second" in the embodiments of this utility model are for the purpose of distinguishing two entities or parameters with the same name but different names. It is clear that "first" and "second" are only for the convenience of expression and should not be construed as limiting the embodiments of this utility model. Subsequent embodiments will not explain this in detail.

[0018] The directional and positional terms used in this utility model, such as "up," "down," "front," "back," "left," "right," "inner," "outer," "top," "bottom," and "side," are merely for reference to the accompanying drawings. Therefore, the directional and positional terms used are for the purpose of explaining and understanding this utility model, and not for limiting the scope of protection of this utility model.

[0019] like Figures 1 to 4 As shown, this is an embodiment of the present invention. An injection-molded shoe midsole includes a heel body 1 and a forefoot body 2 injection-molded at one end of the heel body 1. The forefoot body 2 is made of elastic plastic material, and the heel body 1 is made of hard plastic material. The end of the heel body 1 connected to the forefoot body 2 is provided with a first inclined surface 3. The first inclined surface 3 has a plurality of injection holes 4 recessed therein. The forefoot body 2 is provided with a second inclined surface 5 adapted to the first inclined surface 3. The second inclined surface 5 has a plurality of injection bodies 6 protruding therefrom, adapted to the injection holes 4.

[0020] The beneficial effects of this design are as follows: In this invention, the heel and forefoot bodies are connected by a first inclined surface and a second inclined surface, which significantly increases the contact area between the forefoot and heel bodies, thereby improving the connection strength. The interlocking structure of the injection hole and the injection body further strengthens the interface bonding force, effectively avoiding the problem of loosening or breaking at the connection due to repeated bending during walking, improving the overall durability and service life of the shoe midsole. The inclined surface structure also makes the stress evenly distributed at the connection, reducing local stress concentration and further reducing the risk of fatigue fracture.

[0021] Furthermore, the heel body 1 is provided with a third inclined surface 7, and a corner block 8 is formed between the first inclined surface 3 and the third inclined surface 7. The forefoot body 2 is provided with a fourth inclined surface 9 that is adapted to the third inclined surface 7, and a corner groove 10 is formed between the second inclined surface 5 and the fourth inclined surface 9 for the corner block 8 to be inserted and fitted.

[0022] The beneficial effects of this design are as follows: the interlocking of the corner block and the corner groove forms a highly efficient mechanical interlocking structure. This structure can significantly resist the lateral shear force and torsional force generated between the forefoot and heel during walking, fundamentally preventing the misalignment and separation of the two parts under complex stress. The connection stability is qualitatively improved. This not only further increases the effective bonding area, but also allows the force to be effectively transmitted and dispersed in multiple directions, resulting in stronger overall structural support and superior mechanical performance.

[0023] Further configuration: a plurality of injection holes 4 are evenly distributed laterally on the first inclined surface 3, each injection hole 4 penetrates the third inclined surface 7 along the first inclined surface 3, and each injection body 6 is connected to the fourth inclined surface 9 along the second inclined surface 5.

[0024] The beneficial effects of this design are as follows: the injection holes penetrate the first and third inclined surfaces, allowing the injection molded body to simultaneously fill the space between the first and third inclined surfaces after molding, forming a three-dimensional anchoring structure that penetrates the corner block. This through-type design upgrades the connection between the forefoot and heel from surface contact to body interlocking, greatly increasing the separation resistance and making the connection more robust and reliable. The injection holes, evenly distributed along the transverse direction, completely avoid stress concentration, significantly improving fatigue life. Furthermore, the injection holes and the injection molded body form a complete and seamless internal skeleton structure, improving the injection molding quality.

[0025] Furthermore, a groove 11 is recessed on the end face of the forefoot body 2, and several rows of evenly distributed wave patterns 12 are raised in the groove 11.

[0026] The beneficial effects of this design are as follows: the evenly distributed wave pattern forms an efficient stress buffer network. When the forefoot bends, the wave pattern structure can guide the stress to be dispersed and released in an orderly manner in its evenly distributed direction, which is conducive to the flexible bending of the forefoot during walking and improves the naturalness and adaptability of movement.

[0027] Further, it also includes a bent piece 13 made of elastic plastic material, which covers the wavy pattern 12 by bonding it to the inner periphery of the groove 11.

[0028] The beneficial effects of this design are as follows: the folded plate provides a large, completely flat and seamless bonding interface for the upper or other upper components, eliminating the risk of uneven adhesive filling or air bubbles that may be caused by the wavy structure, and also avoiding the wavy texture from rubbing against the foot, making it more comfortable to wear.

[0029] Furthermore, the bent piece 13 is provided with several sets of perforated sections 14, each set of perforated sections 14 including several strip-shaped holes 15 that are evenly distributed laterally.

[0030] The beneficial effects of this design are as follows: the perforations provide bending space for the folding piece, precisely guiding it to bend laterally, while the solid part still ensures the structural continuity of the folding piece, thus maintaining its overall tear resistance and structural integrity while providing excellent flexibility. The perforations also improve the breathability and drainage performance of the sole, enhancing the comfort of wearing the shoe.

[0031] Furthermore, the strip holes 15 of each pair of adjacent groups of the perforated sections 14 are staggered.

[0032] The benefits of this design are as follows: it avoids stress concentration that may be caused by the alignment of the strip holes, enhances the tear resistance and fatigue resistance of the connection area, balances lightweight and structural stability, makes bending movements smoother, less strenuous and natural, and greatly improves the comfort and flexibility when walking.

[0033] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A molded shoe midsole, comprising a heel body (1) and a forefoot body (2) injection-molded at one end of the heel body (1), wherein the forefoot body (2) is made of elastic plastic material and the heel body (1) is made of rigid plastic material, characterized in that: The heel body (1) is connected to the forefoot body (2) at one end with a first inclined surface (3), and a number of injection holes (4) are recessed on the first inclined surface (3). The forefoot body (2) is provided with a second inclined surface (5) that is adapted to the first inclined surface (3), and a number of injection bodies (6) that are adapted to the injection holes (4) are protruding on the second inclined surface (5).

2. The injection-molded shoe midsole according to claim 1, characterized in that: The heel body (1) is also provided with a third inclined surface (7), and a corner block (8) is formed between the first inclined surface (3) and the third inclined surface (7). The forefoot body (2) is also provided with a fourth inclined surface (9) that is adapted to the third inclined surface (7), and a corner groove (10) is formed between the second inclined surface (5) and the fourth inclined surface (9) for the corner block (8) to be inserted and fitted.

3. The injection-molded shoe midsole according to claim 2, characterized in that: Several injection holes (4) are evenly distributed in the transverse direction on the first inclined surface (3), each injection hole (4) penetrates the third inclined surface (7) along the first inclined surface (3), and each injection body (6) is connected to the fourth inclined surface (9) along the second inclined surface (5).

4. The injection-molded shoe midsole according to claim 1, characterized in that: The forefoot (2) also has a groove (11) recessed on its end face, and several rows of evenly distributed wave patterns (12) protrude from the groove (11).

5. The injection-molded shoe midsole according to claim 4, characterized in that: It also includes a bent piece (13) made of elastic plastic material, which covers the wavy pattern (12) by bonding it to the inner periphery of the groove (11).

6. The injection-molded shoe midsole according to claim 5, characterized in that: The bending piece (13) is provided with several sets of holes (14), and each set of holes (14) includes several strip holes (15) that are evenly distributed laterally.

7. The injection-molded shoe midsole according to claim 6, characterized in that: The strip holes (15) of each pair of adjacent sets of holes (14) are staggered.

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