A high-strength steel hook

Abstract

This utility model discloses a high-strength steel shank, which is integrally formed and bent from a medium carbon steel sheet. The surface has a martensitic hardening layer, balancing strength and wear resistance, effectively extending its service life. The metal sheet is divided into a forefoot support area and a heel support area, with a central keel and two reinforcing ribs distributed on both sides of the keel at the bottom. Both ends of the keel and reinforcing ribs extend to the forefoot and heel support areas, forming reinforced support, improving deformation resistance, and enhancing foot support and wearing comfort. Eyelet holes are provided in both the forefoot and heel support areas, and several fixing posts are provided around the corresponding holes at the bottom, doubly reinforcing the connection with the shoe body, preventing displacement and loosening, and ensuring safety. This design gives the steel shank significant advantages in performance and practicality.

Description

Technical Field

[0001] This utility model relates to the field of steel hook technology, specifically a high-strength steel hook. Background Technology

[0002] In the footwear industry, steel shanks are core components, typically installed in the arch of the shoe. Their main function is to maintain the inherent curvature of the sole and stabilize the heel, directly affecting the shoe's comfort and structural stability.

[0003] Currently, traditional steel shanks have many problems in practical applications. Existing products lack sufficient strength and are prone to deformation under prolonged stress, resulting in a short lifespan. Traditional steel shanks lack a scientifically designed reinforced support system, have weak resistance to deformation, and cannot provide continuous and stable support for the foot, easily exacerbating foot fatigue. During installation, traditional steel shanks rely on only a single method to connect to the shoe body, making them prone to displacement and loosening during use, affecting the shoe's safety and durability. Utility Model Content

[0004] In order to overcome the shortcomings of existing technical solutions, this utility model provides a high-strength steel hook core, which can effectively solve the technical problem of insufficient strength of current steel hook cores.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A high-strength steel hook is formed by bending an integrally molded metal sheet. The metal sheet is made of medium carbon steel and has a martensitic hardened layer on its surface.

[0007] The metal sheet has a forefoot support area at the front end and a heel support area at the rear end. The metal sheet has a keel in the middle and two reinforcing ribs distributed on both sides of the keel at the bottom. The ends of the keel and the reinforcing ribs extend to the forefoot support area and the heel support area, respectively.

[0008] Both the forefoot support area and the heel support area are provided with eyelet holes, and the bottom of the metal sheet is provided with several fixing posts distributed around the corresponding eyelet holes.

[0009] Furthermore, the heel support area is provided with screw holes for fixing the heel.

[0010] Furthermore, the keel protrudes towards the bottom end of the metal sheet after being stamped.

[0011] Furthermore, the reinforcing rib is welded and fixed to the metal sheet, and the cross-section of the reinforcing rib is trapezoidal.

[0012] Furthermore, the end of the fixing post has a pointed structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] The steel shank provided by this utility model uses a medium carbon steel base material with a surface martensitic hardening layer, which takes into account both strength and wear resistance, effectively extending the service life; the metal sheet with the central keel and the side reinforcing ribs runs through the forefoot and heel support areas, forming a reinforced support, improving the ability to resist deformation, and enhancing foot support and wearing comfort; the eyelet holes combined with the outer fixing posts provide double reinforcement to the connection with the shoe body, preventing displacement and loosening, and ensuring safety in use. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the top structure of the steel hook core in an embodiment of this utility model;

[0016] Figure 2 This is a three-dimensional schematic diagram of the bottom structure of the steel hook core in an embodiment of this utility model;

[0017] Numbering on the map:

[0018] 1-Metal sheet, 2-Martensitic hardened layer, 3-Keel, 4-Reinforcing rib, 5-Glass nail hole, 6-Fixing post, 7-Screw hole;

[0019] 101 - Forefoot support zone, 102 - Heel support zone. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-2 As shown, this utility model provides a high-strength steel shank, which aims to significantly improve the overall strength and support performance of the steel shank through the synergistic design of material optimization and structural reinforcement, and is suitable for various types of footwear that require strong support.

[0022] The steel shank is formed by integrally bending a metal sheet 1, resulting in a long strip structure that conforms to the curvature of the shoe sole. The metal sheet 1 is made of medium carbon steel as the base material. Medium carbon steel has a moderate carbon content and high strength and toughness, which can meet the support requirements of the steel shank and facilitate subsequent bending, stamping and other processing.

[0023] To further enhance the surface hardness and wear resistance of the metal sheet 1, a martensitic hardened layer 2 is formed on its surface through quenching treatment. The martensitic structure has the characteristics of high strength and high hardness, which can increase the surface hardness of the metal sheet 1 by 30%-50%, effectively resisting shoe sole friction and external impact, and extending the service life of the steel shank.

[0024] The metal plate 1 is divided into a forefoot support area 101 at the front end and a heel support area 102 at the rear end along its length. The two areas correspond to the forefoot and heel positions of the sole, respectively, and bear the main pressure when the human body walks.

[0025] The width of the forefoot support area 101 is slightly larger than the middle of the metal plate 1, adapting to the wide structure of the forefoot and ensuring the dispersion of impact force when the forefoot lands. The heel support area 102 has a slightly outward-expanding arc shape, conforming to the contour of the heel and enhancing the wrap-around support for the heel.

[0026] The keel 3 is located in the middle of the metal sheet 1, running along its length, and serves as the "longitudinal main support" of the steel hook. After being processed by stamping, the keel 3 protrudes towards the bottom end of the metal sheet 1, forming an arc-shaped structure that is concave at the top and convex at the bottom. This protruding design significantly improves the longitudinal bending resistance of the keel 3. When the sole bears the weight of the human body, the keel 3 can disperse stress through its own deformation, preventing breakage in the middle.

[0027] Both ends of the keel 3 and the reinforcing rib 4 extend to the forefoot support area 101 and the heel support area 102, ensuring that the reinforcing structure runs through the entire length of the steel hook core, guaranteeing uninterrupted force transmission. There are two reinforcing ribs 4, symmetrically distributed on both sides of the keel 3, and fixed to the metal sheet 1 by arc welding. The cross-section of the reinforcing rib 4 is trapezoidal. Compared to rectangular or triangular structures, the trapezoidal structure can more evenly distribute lateral stress, forming a robust three-dimensional support system with the keel 3, further enhancing the overall torsional resistance of the steel hook core.

[0028] Eyelet holes 5 are provided in both the forefoot support area 101 and the heel support area 102, for inserting eyelet studs to secure the steel shank to the upper or sole material. The edges of the eyelet holes 5 are chamfered to prevent sharp edges from cutting the material.

[0029] The fixing pins 6 are located at the bottom of the metal sheet 1 and are evenly distributed around each eyelet hole 5. The fixing pins 6 are integrally stamped from the metal sheet 1 and have a pointed end. The pointed design allows the fixing pins 6 to easily penetrate the rubber, foam, or other materials on the sole, forming a "double fixation" with the eyelet to prevent the steel shank from shifting inside the sole.

[0030] Screw hole 7 is located in the middle of the heel support area 102 and is used to fix the heel to the steel shank with screws. After the screw passes through screw hole 7, it connects to the hard material of the heel (such as plastic or wood), which improves the synergistic support between the heel and the steel shank and prevents the heel from loosening or falling off.

[0031] During the processing of the steel shank, a medium carbon steel sheet is taken and stamped to form a shape that matches the curvature of the shoe sole, forming the initial outline of the metal sheet 1; the metal sheet 1 is surface hardened to form a martensitic hardened layer 2 on its surface; the middle part of the metal sheet 1 is stamped using a stamping die to make the keel 3 protrude towards the bottom; the trapezoidal cross-section reinforcing rib 4 is welded to the preset positions on both sides of the keel 3; eyelet holes 5 and screw holes 7 are machined in the forefoot support area 101 and the heel support area 102 using a drilling machine, and the edges of the holes are ground; the fixing post 6 is machined at the bottom of the metal sheet 1 through a stamping process to ensure that its end forms a sharp corner.

[0032] The steel shank provides stable support to the sole primarily through the synergistic effect of material strength, structural reinforcement, and multi-point fixation. During assembly, the steel shank is first placed in a pre-set groove on the sole, and the pointed end of the fixing post 6 is inserted into the sole material to initially restrict lateral movement. Eyelets are then passed through the eyelet holes 5 to secure the upper fabric to the steel shank and sole, forming a unified connection. Screws are then passed through the screw holes 7 to tighten the heel and heel support area 102, ensuring stress is transmitted through the steel shank when the heel is under load. During use, when the body weight acts on the sole, the keel 3 bears longitudinal pressure through its raised structure, resisting bending deformation of the sole; the trapezoidal reinforcing ribs 4 on both sides disperse lateral stress, preventing the steel shank from twisting; the martensitic hardening layer 2 improves surface wear resistance and hardness, avoiding wear caused by friction with the sole material. The synergistic effect of these structures allows the steel shank to withstand the impact of walking and jumping while maintaining stable support performance over a long period, extending the shoe's lifespan.

[0033] Compared with traditional technologies, the steel shank provided by this technical solution uses a medium carbon steel base material with a surface martensitic hardening layer, which balances strength and wear resistance, effectively extending service life; the central keel of the metal sheet and the reinforcing ribs on both sides run through the forefoot and heel support areas to form reinforced support, improve deformation resistance, and enhance foot support and wearing comfort; the eyelet holes combined with the outer fixing posts provide double reinforcement to the connection with the shoe body, preventing displacement and loosening, and ensuring safety in use.

[0034] 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 illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this invention, and no reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A high-strength steel hook, formed by bending an integrally molded metal sheet, characterized in that: The metal sheet is made of medium carbon steel, and the surface of the metal sheet is provided with a martensitic hardened layer. The metal sheet has a forefoot support area at the front end and a heel support area at the rear end. The metal sheet has a keel in the middle and two reinforcing ribs distributed on both sides of the keel at the bottom. The two ends of the keel and the reinforcing ribs extend to the forefoot support area and the heel support area, respectively. Both the forefoot support area and the heel support area are provided with eyelet holes, and the bottom of the metal sheet is provided with several fixing posts distributed around the corresponding eyelet holes.

2. The high-strength steel hook according to claim 1, characterized in that: The heel support area is provided with screw holes for fixing the heel.

3. The high-strength steel hook core according to claim 1, characterized in that: The keel protrudes towards the bottom end of the metal sheet after being stamped.

4. The high-strength steel hook according to claim 1, characterized in that: The reinforcing rib is welded and fixed to the metal sheet, and the cross-section of the reinforcing rib is trapezoidal.

5. A high-strength steel hook according to any one of claims 1-4, characterized in that: The end of the fixing post has a pointed structure.

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