Sea salt insole
By designing a rotatable receiving pad and a perforated structure in the sea salt insole, dynamic replenishment of sea salt fibers is achieved, solving the problem of functional failure caused by individual differences, extending service life and reducing replacement frequency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 温州多源鞋业有限公司
- Filing Date
- 2025-10-14
- Publication Date
- 2026-07-21
AI Technical Summary
Existing sea salt insoles, after prolonged use, experience localized wear due to individual differences, leading to functional failure in some areas, affecting their performance, increasing the need for frequent replacements, and adding to the environmental burden.
A sea salt insole was designed, which features rotatable receiving pads in the metatarsal heads, forefoot, and heel bone areas. The exposed openings and perforated structures enable dynamic replenishment of sea salt fibers. Combined with the concave-convex structure and hoop fixation, it ensures the continuous and effective release of sea salt components in the high-frequency region.
It extends the lifespan of the insoles, reduces the cost and environmental burden of frequent replacements, and maintains the continuity of antibacterial and moisture-wicking functions as well as structural stability.
Smart Images
Figure CN224522469U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a sea salt insole. Background Technology
[0002] Currently, sea salt insoles have been developed on the market. They rely on the antibacterial properties of sodium chloride osmotic pressure and the moisture-wicking properties of porous structure to inhibit bacteria on the feet and reduce sweat gland secretion, meeting foot care needs. Technically, a multi-layer composite process is used, consisting of a breathable surface layer, a middle layer of sea salt, and a bottom support layer, combined with nano-coating technology to enhance the antibacterial effect of the insoles. However, existing technologies simply add sea salt materials to the insoles. Especially after prolonged use, due to differences in foot shape and walking force, the insoles deform differently. This causes some of the added components to wear down and become ineffective over time, while others remain in their original state. As a result, the insoles are not effectively used when they are discarded, affecting the product's performance. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a sea salt insole with a simple structure, reasonable layout, and the ability to be replaced and supplemented as needed, resulting in good performance.
[0004] To achieve the above objectives, this utility model provides a sea salt insole, comprising an insole surface layer and an insole bottom layer. The insole surface layer is disposed on the insole bottom layer, and the edge of the insole surface layer is fixedly connected to the edge of the insole bottom layer. Receiving pads are respectively disposed on the insole bottom layer corresponding to the metatarsal head support area, the forefoot area, and the heel support area. The receiving pads are circular in shape and contain textile fibers coated with sea salt powder. The insole surface layer has exposed openings corresponding to the metatarsal head support area, the forefoot area, and the heel support area. The receiving pads are larger than the exposed openings. The center of the receiving pad is located on the edge of the metatarsal head support area, the forefoot area, or the heel support area. An embedding hole is disposed on the insole bottom layer corresponding to the center of the receiving pad, and the center of the receiving pad is connected to the embedding hole.
[0005] The beneficial effects of this design are as follows: The compartmentalized design of the insole, with its exposed and non-exposed openings, allows the sea salt textile fibers to release their antibacterial and moisture-wicking functions only in the high-frequency pressure areas of the foot, namely the metatarsal heads, forefoot, and heel bone areas—the areas corresponding to the exposed openings. The sea salt components in the non-exposed areas remain in a reserve state. When the sea salt under the exposed openings experiences functional attenuation due to prolonged footing and sweat, the user can rotate the insole around the embedded holes by rubbing the surface and bottom layers of the insole. This moves the insufficiently consumed non-exposed areas to the exposed openings, achieving dynamic replenishment of the sea salt components. This prevents the entire insole from becoming unusable due to localized functional failure, significantly extending its lifespan while reducing the cost and environmental burden of frequent replacements. Rotation can align the area with higher sea salt fiber density on the insole with the forefoot exposed opening, enhancing localized moisture absorption and antibacterial properties. The insole's larger size than the exposed opening, along with the rotating structure of the central embedded hole, ensures that the exposed opening is always covered by sea salt textile fibers during rotation, without gaps appearing at the edges due to displacement, guaranteeing the structure's effectiveness. The textile fibers here are made by grinding sea salt into micro powder of 500 mesh or higher, and then incorporating it into bamboo fiber, cotton fiber or polyester fiber through melt blending or impregnation process, and then weaving it into the surface or middle layer of the insole. This preparation method is existing technology and will not be elaborated on here.
[0006] As a further feature of this invention, a film is provided on the surface of the pad at the exposed opening position, and the surface of the film is evenly distributed with fine pores. Striped protrusions are provided at intervals around the exposed opening on the inner wall of the pad surface, and a number of contact protrusions are provided on the bottom layer of the pad corresponding to the striped protrusion positions.
[0007] The beneficial effects of this design are as follows: During daily wear, the circumferential raised stripes on the exposed surface of the padding and the contact points on the bottom layer of the padding form a two-way interlocking action. The raised stripes provide circumferential restraint from the edge of the padding, while the contact points provide point support from the bottom. Together, they enhance the friction between the padding and the padding layer, preventing the padding from rotating on its own or its edges from curling up due to foot pressure during walking. This ensures that the padding and the exposed surface remain precisely aligned, eliminating foot discomfort or functional gaps caused by misalignment. When adjusting the padding, the force applied by rubbing the surface and bottom layers of the padding is transmitted more efficiently to the padding through the edges of the raised stripes and the point contact of the contact points, preventing slippage and making adjustments easier and more precise. Simultaneously, the film covering the exposed surface and the evenly distributed pores further constrain the padding without affecting the moisture-wicking and antibacterial properties of the sea salt (the pores ensure sweat penetration and the release of sea salt's effects). This, combined with the concave-convex structure, enhances overall stability, balancing functionality and user experience.
[0008] As a further feature of this invention, the center of the receiving pad is provided with an insertion port for inserting textile fibers into the receiving pad, the insertion port is provided with a surrounding edge in the circumferential direction, the surrounding edge is provided with a first hoop, and the bottom layer of the pad body is provided with a second hoop in the circumferential direction of the insertion hole, the second hoop abutting against the first hoop.
[0009] The beneficial effects of this design are as follows: The first hoop along the surrounding edge enhances the structural strength of the surrounding edge, preventing deformation and cracking after long-term use and extending the service life of the accommodating pad. The second hoop around the bottom hole of the pad body forms a contact fit with the first hoop, achieving precise positioning of the accommodating pad and the bottom of the pad body. This prevents radial displacement of the accommodating pad when rotating around the hole, ensuring that the center of the accommodating pad is always aligned with the hole. Consequently, it ensures that the accommodating pad can still accurately correspond to the exposed opening after rotation, without affecting subsequent rotation switching.
[0010] As a further feature of this utility model, the first hoop and the second hoop are respectively provided with broken ends, and the first hoop and the second hoop are fixed by hooking the broken ends.
[0011] The advantages of this design are as follows: the break allows the hoop to have slight elasticity, which can be used to open it during assembly, easily achieving the fitting or contact of the first and second hoops, avoiding structural damage caused by hard joints; the coiled fixation allows the two hoops to form a nested interlocking, and the overlap at the break increases the contact area, significantly improving the resistance to loosening compared to traditional butt joint connections. It can effectively resist the radial tension when the receiving pad rotates and the vibration when walking. This structure can maintain the rigidity of the hoop while reserving a small adjustment space, ensuring that the center of the receiving pad is precisely aligned with the hole, and preventing the hoop from breaking due to stress concentration after long-term use, further ensuring the durability of the overall structure.
[0012] As a further feature of this invention, a plurality of soft support columns are provided between the surface layer and the bottom layer of the pad.
[0013] The beneficial effects of this design are as follows: With several support pillars evenly distributed between the surface and bottom layers of the insole, the localized pressure from footsteps (such as the concentrated force of forefoot push-off and heel strike) is dispersed throughout the entire insole. This prevents the surface or bottom layer from collapsing or wrinkling due to excessive force at a single point, significantly enhancing the overall structural rigidity of the insole. Tests have shown that this can increase the insole's resistance to deformation by more than 50%, extending its shape stability over long-term use. The soft characteristics of the support pillars, such as the use of elastic silicone or low-density PU materials, provide support while retaining cushioning performance. They can slightly deform with foot pressure during walking, reducing the discomfort caused by hard support and balancing support strength with wearing comfort. Furthermore, the gaps between the support pillars act as ventilation channels, accelerating air circulation inside the shoe, and combined with the moisture-absorbing function of sea salt, further improving the dryness inside the shoe. Attached Figure Description
[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional structural diagram of an embodiment of the present utility model; Figure 3 This is a schematic diagram of the structure of the bottom layer of the pad in an embodiment of the present utility model; Figure 4 This is a schematic diagram of the structure of the accommodating pad in an embodiment of this utility model. Detailed Implementation
[0015] This utility model provides an embodiment of a sea salt insole, such as... Figures 1 to 4 As shown, the pad includes a surface layer 2 and a bottom layer 1. The surface layer 2 is disposed on the bottom layer 1, and the edge of the surface layer 2 is fixedly connected to the edge of the bottom layer 1. The bottom layer 1 is provided with receiving pads 3 corresponding to the metatarsal head support area, the forefoot area, and the heel support area, respectively. The receiving pads 3 are circular and contain textile fibers coated with sea salt powder. The surface layer 2 is provided with exposure openings 21 corresponding to the metatarsal head support area, the forefoot area, and the heel support area, respectively. The receiving pads 3 are larger than the exposure openings 21. The center of the receiving pads 3 is located on the edge of the metatarsal head support area, the forefoot area, or the heel support area. The bottom layer 1 is provided with a recessed hole corresponding to the center of the receiving pads 3, and the center of the receiving pads 3 is connected to the recessed hole. The beneficial effects of this design are as follows: The accommodating pad 3, through its partitioned design of exposed and non-exposed openings 21, allows the sea salt textile fibers to release their antibacterial and moisture-wicking properties only in the high-frequency pressure areas of the foot, namely the metatarsal heads, forefoot, and heel bone areas—that is, the locations corresponding to the exposed openings 21. The sea salt components in the non-exposed openings 21 remain in a reserve state. When the sea salt under the exposed openings 21 experiences functional attenuation due to prolonged footing and sweat absorption, the user can rub the surface layer 2 and the bottom layer of the pad, causing the accommodating pad 3 to rotate around the embedded holes, thus discharging the unused sea salt from the non-exposed openings 21 areas. At the exposed opening 21, the sea salt component is dynamically replenished, preventing local functional failure that could render the entire insole unusable, significantly extending its lifespan, and reducing the cost and environmental burden of frequent replacements. By rotating the receiving pad 3, the area with the higher density of sea salt fibers can be aligned with the forefoot exposed opening 21, enhancing local moisture absorption and antibacterial properties. The receiving pad 3 is larger than the exposed opening 21, and its centrally embedded hole and rotating structure ensure that the exposed opening 21 is always covered by sea salt textile fibers during rotation, without gaps appearing at the edges due to displacement, guaranteeing the structure's effectiveness. The textile fibers here are made by grinding sea salt to a fine powder of 500 mesh or higher, incorporating it into bamboo fiber, cotton fiber, or polyester fiber through melt blending or impregnation processes, and then weaving it into the insole's surface or middle layer fabric. This preparation method is existing technology and will not be elaborated upon here.
[0016] As a further feature of this embodiment, a film is provided on the surface layer 2 of the pad at the exposed opening 21. The surface of the film is evenly distributed with fine pores. Striped protrusions are provided at intervals around the exposed opening 21 on the inner wall of the surface layer 2 of the pad. A number of contact protrusions are provided on the bottom layer 1 of the pad corresponding to the striped protrusions. The beneficial effect of this design is that, during daily wear, the striped protrusions around the exposed opening 21 of the surface layer 2 of the pad and the contact protrusions on the bottom layer 1 of the pad form a bidirectional interlocking action. The striped protrusions provide circumferential restraint from the edge of the accommodating pad 3, and the contact protrusions provide point support to the accommodating pad 3 from the bottom. Both enhance the friction between the accommodating pad 3 and the pad layer, preventing the accommodating pad 3 from rotating on its own or its edges from curling up due to foot pressure during walking. This ensures that the accommodating pad 3 always maintains a precise correspondence with the exposed opening 21, eliminating foot discomfort or functional discontinuity caused by displacement. When the accommodating pad 3 needs to be adjusted, the force of rubbing the surface 2 and the bottom layer of the pad will be transmitted to the accommodating pad 3 more efficiently through the raised edges of the stripes and the point contact of the contact bumps, avoiding slippage and making the rotation adjustment more effortless and precise; at the same time, the film and evenly distributed pores of the exposed opening 21, without affecting the moisture absorption and antibacterial properties of the sea salt (the pores ensure the penetration of sweat and the release of the sea salt's efficacy), further form a surface constraint on the accommodating pad 3, and enhance the overall stability with the concave and convex structure, taking into account both function and user experience.
[0017] As a further feature of this embodiment, the receiving pad 3 has an insertion port at its center for inserting textile fibers into the receiving pad 3. The insertion port is surrounded by a periphery 31, and a first hoop is provided along the edge of the periphery 31. The bottom layer 1 of the pad body is provided with a second hoop around the insertion hole, and the second hoop abuts against the first hoop. The beneficial effects of this configuration are: the first hoop along the periphery 31 enhances the structural strength of the periphery 31, preventing deformation and cracking of the periphery 31 after long-term use, thus extending the service life of the receiving pad 3. The second hoop around the insertion hole of the bottom layer 1 of the pad body forms abutting fit with the first hoop, which not only achieves precise positioning of the receiving pad 3 and the bottom layer 1 of the pad body, but also avoids radial displacement when the receiving pad 3 rotates around the insertion hole, ensuring that the center of the receiving pad 3 is always aligned with the insertion hole, thereby ensuring that the receiving pad 3 can still accurately correspond to the exposed opening 21 after rotation, without affecting subsequent rotation switching.
[0018] As a further feature of this embodiment, the first and second hoops are respectively provided with fracture ends, and the first and second hoops are fixed by hooking the fracture ends. The beneficial effects of this design are: the fracture ends give the hoops slight elasticity, allowing them to be easily opened during assembly, thus easily achieving the fitting or contact of the first and second hoops and avoiding structural damage caused by hard joints; while the coiled fixation allows the two hoops to form a nested interlocking structure, and the overlap at the fracture ends increases the contact area, significantly improving the resistance to loosening compared to traditional butt joint connections. It can effectively resist the radial tension when the receiving pad 3 rotates and the vibration during walking. This structure can maintain the rigidity of the hoops while reserving a small adjustment space, ensuring that the center of the receiving pad 3 is precisely aligned with the recessed hole, and preventing the hoops from breaking due to stress concentration after long-term use, further ensuring the durability of the overall structure.
[0019] As a further feature of this embodiment, a plurality of soft support columns 11 are provided between the surface layer 2 and the bottom layer 1 of the insole. The beneficial effects of this arrangement are as follows: With the support columns 11 evenly distributed between the surface layer 2 and the bottom layer, the local pressure of the foot during stepping (such as the concentrated force of the forefoot pushing off and the heel landing) can be distributed throughout the entire insole, preventing the surface or bottom layer from collapsing or wrinkling due to excessive force at a single point. This significantly enhances the overall structural rigidity of the insole, and tests have shown that it can improve the insole's resistance to deformation by more than 50%, extending its shape stability after long-term use. The soft characteristics of the support columns 11, such as using elastic silicone or low-density PU material, can provide support while retaining cushioning performance. They can deform slightly with foot pressure during walking, reducing the discomfort caused by hard support and balancing support strength and wearing comfort. Furthermore, the gaps formed between the support columns 11 can serve as ventilation channels, accelerating air circulation inside the shoe, and further improving the dryness of the shoe interior in conjunction with the moisture-absorbing function of sea salt.
[0020] The above examples are merely one preferred embodiment of this utility model. Ordinary variations and substitutions made by those skilled in the art within the scope of this utility model's technical solution are all included within the protection scope of this utility model.
Claims
1. A sea salt insole, comprising a surface layer and a bottom layer, wherein the surface layer is disposed on the bottom layer, characterized in that: The surface edge of the pad is fixedly connected to the bottom edge of the pad. The bottom layer of the pad has receiving pads corresponding to the metatarsal head support area, forefoot area, and heel support area. Each receiving pad is circular and contains textile fibers coated with sea salt powder. The surface layer of the pad has exposed openings corresponding to the metatarsal head support area, forefoot area, and heel support area. Each receiving pad is larger than the exposed openings. The center of each receiving pad is located at the edge of the metatarsal head support area, forefoot area, or heel support area. The bottom layer of the pad has a recessed hole corresponding to the center of the receiving pad, and the center of the receiving pad is connected to the recessed hole.
2. The sea salt insole according to claim 1, characterized in that: The surface of the pad has a film at the exposed opening, and the surface of the film has fine pores evenly distributed. The inner wall of the pad surface has striped protrusions spaced around the exposed opening. The bottom layer of the pad has several contact protrusions corresponding to the striped protrusions.
3. The sea salt insole according to claim 2, characterized in that: The receiving pad has an insertion port at its center for inserting textile fibers into the receiving pad. The insertion port has a surrounding edge along its circumference. A first hoop is provided along the edge of the surrounding edge. The bottom layer of the pad has a second hoop around the insertion hole, and the second hoop abuts against the first hoop.
4. The sea salt insole according to claim 3, characterized in that: The first hoop and the second hoop are respectively cut off, and the first hoop and the second hoop are fixed by coiling around the cut off.
5. The sea salt insole according to claim 4, characterized in that: Several soft support columns are provided between the surface layer and the bottom layer of the pad.