Safety shoes with composite rubber soles

Abstract

This utility model relates to safety shoes using a composite rubber outsole, comprising a sole, an upper, and a steel liner. The steel liner is fitted over the toe and coated with an electroplated layer. The sole employs a double-layer composite structure, with a PU layer on top and a rubber layer on the bottom. The two layers are joined together via a serrated interface and secured at the edges by ultrasonic welding. Anti-slip treads are provided on the inner side, and drainage grooves are located in the forefoot area. An inflation port with an internal valve is located on the upper surface and communicates with a flexible air bag located inside the steel liner, allowing for internal fit adjustment. This design combines lightweight cushioning with wear resistance and anti-slip performance through the composite outsole structure. The steel liner, combined with the electroplated layer, significantly enhances impact resistance and corrosion resistance. The synergistic effect of the inflation system and the flexible air bag forms a customized cushioning layer, preventing direct impact on the foot while optimizing wearing comfort and safety performance through a dual protection mechanism.

Description

Technical Field

[0001] This utility model relates to the field of safety shoes, specifically to safety shoes with composite rubber outsoles. Background Technology

[0002] In the field of occupational safety and health products, safety shoes, as key equipment for ensuring foot safety, are widely used in industrial production, construction, and high-risk work environments. These shoes must simultaneously meet requirements for impact resistance, puncture resistance, and abrasion resistance, as well as comfort for extended wear. Traditional designs often focus on enhancing a single performance aspect, making it difficult to achieve a balance between protective structure and ergonomics. Especially when dealing with complex work environments, existing products still have room for improvement in terms of structural durability, environmental adaptability, and personalized fit.

[0003] Current safety shoe technologies mostly employ a combination of rigid protective layers and ordinary rubber soles. This design has several limitations: the sole material is usually a single material, traditional rubber outsoles are bulky, and PU outsoles have poor heat resistance, making it difficult to balance lightweight cushioning with high strength and wear resistance, and they are prone to slipping on wet or oily surfaces; metal protective components are prone to corrosion when exposed to humid environments for a long time, affecting structural strength and service life; the foot fit system mostly relies on pre-molded linings or fixed cushioning layers, which cannot achieve dynamic adaptation according to individual foot shape differences, leading to fatigue caused by local pressure or insufficient support. At the same time, the traditional protective layer lacks a cushioning transition design between the protective layer and the sole, allowing external impact energy to be directly transmitted to the foot, creating a contradiction between protective effectiveness and wearing experience. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned defects and provide a safety shoe with a composite rubber outsole, which solves the technical problem that the edge of the steel toe will continuously compress the toe joints, and long-term wear will easily cause skin wear and even bone damage.

[0005] The objective of this utility model is achieved through the following means:

[0006] Safety shoes with a composite rubber outsole include a sole, a shoe body, and a steel liner. The shoe body is located on the upper surface of the sole and is fixedly connected by adhesive and stitching. The steel liner is fitted over the toe portion of the shoe body. Shoelaces are threaded through the surface of the shoe body. The outsole has a double-layer composite structure, including an upper PU layer and a lower rubber layer. The PU layer and the rubber layer are connected by a serrated interface, and the connecting edges of the PU layer and the rubber layer are fixed by ultrasonic welding. The inner side of the sole has anti-slip treads. The forefoot area of ​​the sole has drainage grooves. The surface of the steel liner has an electroplated layer. An inflation port with a built-in valve is located on the surface of the shoe body. A flexible air bag is built into the toe portion of the shoe body and is connected to the inflation port. The flexible air bag is located inside the steel liner.

[0007] Furthermore, the shoe body has reinforcing ribs sewn on both sides. The reinforcing ribs are made of Kevlar fiber and nylon thread, with a width of 15mm and arranged in a wavy shape. The reinforcing ribs are wrapped with a leather layer with a thickness of 0.8mm, and the surface of the leather layer is treated with a waterproof coating.

[0008] Furthermore, a protective sleeve is fitted over the upper part of the shoe opening. This protective sleeve is injection molded from thermoplastic polyurethane elastomer, and its inner wall has anti-slip protrusions. The interior of the protective sleeve is embedded with a material with a density of 45 kg / m³. 3 The slow-rebound sponge has an antibacterial fiber fabric covering its surface.

[0009] Furthermore, the surface of the shoe body is fitted with shoelaces, which are aramid fiber woven straps with metal buckles at the ends. Four sets of guide metal rings are provided at the junction of the shoelaces and the shoe body, and ceramic bushings are embedded in the inner wall of the metal rings to reduce frictional wear.

[0010] Furthermore, a flexible hose is installed at the air outlet of the inflation port. The hose is made of silicone and has an inner diameter of 6mm. The hose extends along the inside of the shoe body and is connected to the flexible air bag. The fixing point between the hose and the shoe body is achieved by ultrasonic welding.

[0011] Furthermore, the inner side of the flexible airbag, in contact with the toes, is lined with a protective layer. This protective layer is made of TPU-coated nylon fabric with a thickness of 1.2 mm, and is filled with a 300 g / m³ density. 2 The cotton core is flame-retardant treated, and the cotton core and protective layer improve the user's comfort when in contact with the flexible airbag.

[0012] The beneficial effects of this utility model are:

[0013] This safety shoe enhances both protective performance and wearing comfort through the synergistic design of a composite rubber outsole and a steel liner. The outsole features an upper layer of PU and a lower layer of rubber, providing both lightweight cushioning and wear-resistant, slip-resistant capabilities. The steel liner is coated with an electroplated layer to strengthen impact resistance and effectively prevent corrosion caused by humid environments. The built-in inflation system, through the combination of flexible air bags and valves, allows users to adjust the internal fit according to their foot shape. The air bags' location on the inside of the steel liner provides customized cushioning while preventing external impacts from directly affecting the foot, thus creating dual protection for the foot. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of the safety shoe with a composite rubber outsole according to this utility model;

[0015] Figure 2 This is a cross-sectional view of the toe section of the safety shoe with a composite rubber outsole according to this utility model.

[0016] Figure 3 This is a schematic diagram of the sole of the safety shoe with a composite rubber outsole according to this utility model;

[0017] Figure 4 This is a three-dimensional structural diagram of the flexible airbag portion of the safety shoe with a composite rubber outsole according to this utility model.

[0018] Figure 5 This is a top view of the flexible airbag portion of the safety shoe with a composite rubber outsole according to this utility model.

[0019] In the diagram: 1. Sole; 11. PU layer; 12. Rubber layer; 13. Reinforcing rib; 2. Shoe body; 3. Protective cover; 4. Shoelaces; 5. Steel lining plate; 61. Inflation port; 62. Hose; 63. Flexible air bag; 64. Protective layer. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] In this embodiment, refer to Figures 1-5 The safety shoe specifically implemented uses a composite rubber outsole, including a sole 1, a shoe body 2, and a steel liner 5. The sole 1 is made of composite rubber material. The shoe body 2 is connected to the sole 1 by a double fixing method of adhesive and stitching. The steel liner 5 is fitted with high-strength resin and bonded to the outside of the toe area of ​​the shoe body 2.

[0022] The sole 1 is made of a double-layer composite structure. The bottom has anti-slip treads with a depth of 3-5mm, and the forefoot area has multiple drainage grooves. The steel liner 5 has an electroplated layer on its surface, and its arc contour is adapted to the shape of the human toes. It is filled with cushioning foam material. The outsole of the sole 1 is divided into a double-layer composite structure, including an upper PU layer 11 and a lower rubber layer 12. The PU layer and the rubber layer are connected by a serrated interface, and the connecting edge of the PU layer and the rubber layer is fixed by ultrasonic welding. The outsole of the sole 1 uses the upper PU material to provide lightweight shock absorption, and the lower rubber material to enhance wear resistance and anti-slip ability. The combination of serrated interface and ultrasonic welding process ensures the interlayer bonding strength and effectively avoids the risk of delamination after long-term use. At the same time, the welded edge forms a smooth transition, reducing the possibility of foreign objects getting stuck.

[0023] Both sides of the shoe body 2 are stitched with reinforcing ribs 13. The reinforcing ribs 13 are made of Kevlar fiber and nylon thread, with a width of 15mm and arranged in a wavy shape. The reinforcing ribs 13 are wrapped with a leather layer with a thickness of 0.8mm, and the surface of the leather layer is treated with a waterproof coating.

[0024] The upper part of the shoe body 2 is also fitted with a protective sleeve 3. The protective sleeve 3 is injection molded from thermoplastic polyurethane elastomer, and its inner wall is provided with anti-slip protrusions. The interior of the protective sleeve 3 is embedded with a density of 45kg / m³. 3 The slow-rebound sponge has an antibacterial fiber fabric covering its surface.

[0025] The surface of the shoe body 2 is fitted with shoelaces 4, which are made of aramid fiber braided straps with metal buckles at the ends. At the junction of the shoelaces 4 and the shoe body 2, there is a metal ring for guiding the shoelaces. The inner wall of the metal ring is inlaid with ceramic bushings to reduce friction wear.

[0026] An inflation port 61 is provided on the surface of the shoe body 2. The inflation port 61 has a built-in valve. A hose 62 is installed at the air outlet of the inflation port 61. The hose 62 is made of silicone and has an inner diameter of 6mm. The hose 62 extends along the inside of the shoe body 2 and is connected to the flexible air bag 63. The fixing point between the hose 62 and the shoe body 2 is made by ultrasonic welding. The inflation port 61 is a valve core structure commonly used in the prior art.

[0027] The inner side of the flexible airbag 63, in contact with the toes, is also lined with a protective layer 64. The protective layer 64 is made of TPU-coated nylon fabric with a thickness of 1.2 mm, and the interior of the protective layer 64 is filled with a density of 300 g / m³. 2 The cotton core is flame-retardant treated, and the cotton core and protective layer 64 improve the user's comfort when in contact with the flexible air bag 63.

[0028] First, the sole 1 is put on. Based on the distance between the toes and the inside of the steel liner 5, air is inflated into the flexible air bag 63 through an external inflation device, causing the flexible air bag 63 to expand and fit into the user's toes, thereby wrapping and protecting the user's toes.

[0029] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A safety shoe with a composite rubber outsole, comprising a sole, a shoe body, and a steel liner, wherein the shoe body is disposed on the upper surface of the sole and is fixedly connected by adhesive and stitching, the steel liner is fitted over the toe portion of the shoe body, and shoelaces are threaded through the surface of the shoe body, characterized in that: The outsole has a double-layer composite structure, consisting of an upper PU layer and a lower rubber layer. The PU layer and the rubber layer are connected by a serrated interface, and the connecting edges of the PU layer and the rubber layer are fixed by ultrasonic welding. The inner side of the outsole has anti-slip patterns, and the forefoot area of ​​the outsole has drainage grooves. The surface of the steel liner has an electroplated layer. The surface of the shoe body has an inflation port with a built-in valve. The toe area of ​​the shoe body has a built-in flexible air bag connected to the inflation port, and the flexible air bag is located on the inner side of the steel liner.

2. The safety shoe with a composite rubber outsole according to claim 1, characterized in that: The shoe body has reinforcing ribs sewn on both sides of its surface, and the reinforcing ribs are covered with a leather layer.

3. The safety shoe with a composite rubber outsole according to claim 1, characterized in that: The upper part of the shoe opening is also fitted with a protective cover, and the inside of the protective cover is embedded with sponge.

4. The safety shoe with a composite rubber outsole according to claim 1, characterized in that: A metal ring for guiding the shoelaces is embedded at the junction of the shoelaces and the shoe body, and a ceramic bushing is embedded in the inner wall of the metal ring.

5. The safety shoe with a composite rubber outsole according to claim 1, characterized in that: The air outlet of the inflation port is equipped with a hose, which is connected to the flexible air bag.

6. The safety shoe with a composite rubber outsole according to claim 1, characterized in that: The inner side of the flexible air bag, which contacts the toes, is also lined with a protective layer, and the interior of the protective layer is filled with cotton.

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