A sole and running shoe
By designing a three-layer sole structure, and utilizing the different angles and hardness differences of the protrusions, the shoe absorbs the braking force from the front and rear during running, thus solving the problem of insufficient protection for the knee joint in existing running shoes and achieving effective protection for the knee joint.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 361 DEGREES (CHINA) CO LTD
- Filing Date
- 2025-07-03
- Publication Date
- 2026-07-21
AI Technical Summary
Existing running shoes lack effective intervention for fore-and-aft braking forces during long-distance or high-frequency running, leading to increased knee joint shear force and joint reaction force, increased patellofemoral joint pressure and iliotibial band tension, which in turn causes running-related knee pain.
Design a three-layer sole structure, wherein the upper and lower layers of the sole are harder than the middle layer. Protrusions are distributed at intervals along the length of the upper bottom surface, and the front and rear sides of the protrusions have different angles. They are inserted into the grooves of the middle layer. The middle layer is soft and allows the protrusions to deform, while the lower layer is hard and slows down the deformation, absorbing the braking force from the front and rear.
The three-layer sole structure absorbs the braking force from the front and rear, reducing the peak braking force and rate of action during running, thus reducing the impact load on the knee joint and providing good knee protection.
Smart Images
Figure CN224522457U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of footwear technology, and in particular to a sole and running shoe. Background Technology
[0002] During long-distance or high-frequency running, the lower limbs repeatedly bear the ground reaction force. The fore-and-aft braking force primarily occurs during the initial contact phase, as the torso decelerates to prevent the foot from moving too quickly forward. Studies have shown that the greater the fore-and-aft braking force, the greater the shear force and joint reaction force on the knee joint, thus increasing patellofemoral joint pressure, iliotibial band tension, and the tendency for tibial anterior displacement. This fore-and-aft braking force (shear force) is one of the biomechanical causes of running-related knee pain (such as patellar chondromalacia and iliotibial band friction syndrome). Current running shoes primarily focus on vertical cushioning design, lacking targeted intervention for horizontal impact forces, especially with limited fore-and-aft braking force absorption mechanisms, failing to effectively mitigate the cumulative risk of knee joint damage. Utility Model Content
[0003] The purpose of this invention is to provide a sole and running shoe that can reduce the peak braking force or its rate of action during running, thereby reducing the impact load on the knee joint.
[0004] To achieve the above objectives, this utility model discloses a shoe sole comprising an upper layer, a middle layer, and a lower layer connected sequentially. The hardness of the upper and lower layers is greater than that of the middle layer. The upper layer has a plurality of spaced protrusions along its length on its bottom surface. The angle A between the front side of the protrusion and the bottom surface of the upper layer is smaller than the angle B between the rear side of the protrusion and the bottom surface of the upper layer. The middle layer has grooves that fit the protrusions.
[0005] Preferably, the angle B between the rear side of the protrusion and the bottom surface of the upper layer of the sole is 90°. This arrangement facilitates the protrusion to "tilt" forward when under pressure.
[0006] Preferably, the angle A between the front side of the protrusion and the upper bottom surface of the sole is 60°. This design facilitates the protrusion to "tilt" forward under pressure, while also ensuring that the protrusion has a certain strength.
[0007] Preferably, of the front and rear sides of the protrusion, at least the front side of the protrusion is an arc-shaped surface. This arrangement facilitates the protrusion to "tilt" forward when under pressure.
[0008] Preferably, the hardness of the upper and lower layers of the sole is 40D, and the hardness of the middle layer of the sole is 30D.
[0009] Preferably, the upper, middle, and lower layers of the sole are all made of TPEE.
[0010] Preferably, the protrusion is composed of a plurality of serrated studs spaced apart along the width of the sole. This arrangement can improve the comfort of the sole.
[0011] Preferably, the bottom surface of the lower layer of the shoe sole is further provided with an outsole. The outsole is usually made of rubber, which can improve the wear resistance and anti-slip performance of the shoe sole.
[0012] This utility model also discloses a running shoe, which includes the aforementioned sole. This running shoe provides good knee joint protection.
[0013] This utility model has the following beneficial effects:
[0014] This invention features a raised section on the upper surface of the sole, which inserts into a groove in the middle layer. When subjected to downward pressure, the raised section is more prone to tilting forward. The middle layer, being softer than the upper, allows for greater deformation of the raised section. The stiffer lower layer slows down sole deformation, preventing excessive compression and weakening of vertical cushioning. This three-layer design allows for relative displacement between the upper and lower layers. Therefore, when the foot strikes the sole, the upper layer is more likely to move forward relative to the middle layer. This forward displacement, consistent with the forward inertia of the body during braking, absorbs some of the shear force generated when the foot is held back by the shoe, reducing the peak braking force or its rate of action during running, thus lowering the impact load on the knee joint and providing good protection. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the present invention.
[0016] Figure 2 for Figure 1 Enlarged schematic diagram of section D in the middle.
[0017] Figure 3 This is a schematic diagram of the first embodiment of the raised design (view from below, showing the upper layer of the sole).
[0018] Figure 4 This is a schematic diagram of the second embodiment of the protrusion (view from below, showing the upper layer of the sole).
[0019] Explanation of symbols for main components:
[0020] Upper layer of sole 10, protrusion 11, serrated nail 12, middle layer of sole 20, lower layer of sole 30, outsole 40. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.
[0022] like Figure 1-2 As shown, this utility model discloses a running shoe with good knee joint protection. Specifically, this invention features a specially designed sole made of TPEE material, comprising an upper sole 10, a middle sole 20, a lower sole 30, and an outsole 40 connected from top to bottom. The upper sole 10 is the layer that contacts the foot or is closest to the foot, while the outsole 40 is the layer that contacts the ground. The bottom surface of the outsole 40 is designed for slip resistance.
[0023] A plurality of downwardly extending protrusions 11 are provided on the bottom surface of the upper layer 10 of the sole. These protrusions 11 are spaced apart along the length direction (from the toe to the heel) of the bottom surface of the upper layer 10 of the sole, and the length direction of the protrusions 11 is the width direction of the sole. A protrusion 11 may be a single, continuous line, with its length direction being the width direction of the sole; this is one embodiment. Figure 3 As shown; in embodiment two, the protrusion 11 is composed of a plurality of serrated studs 12 spaced apart along the width direction of the bottom surface of the upper layer 10 of the sole. The serrated studs 12 may be conical, such as... Figure 4 As shown, the serrated stud 12 can also be in the shape of a small triangular block, which provides better wearing comfort. The protrusion 11 and the upper layer 10 of the sole are made of the same material and can be molded as a single piece. The middle layer 20 of the sole has a groove that matches the protrusion 11. In actual manufacturing, the upper layer 10 of the sole can be molded first, and then the middle layer 20 of the sole can be molded on top of it to ensure a reliable connection (bonding) between the upper layer 10 and the middle layer 20 of the sole.
[0024] The angle A between the front side of the protrusion 11 and the bottom surface of the upper layer 10 of the sole is smaller than the angle B between the rear side of the protrusion 11 and the bottom surface of the upper layer 10 of the sole. Preferably, A = 60° and B = 90°. This arrangement ensures that the protrusion 11 "tilts" forward when compressed. Alternatively, the front side of the protrusion 11 can be curved to facilitate this forward tilting. In this case, the angle B between the line connecting the intersection of the front side of the protrusion 11 and the bottom surface of the upper layer 10, and the line connecting the intersection of the rear side of the protrusion 11 and the front side, and the bottom surface of the upper layer 10 is the aforementioned angle. Of course, the rear side of the protrusion 11 can also be curved, or both the front and rear sides of the protrusion 11 can be flat.
[0025] In this case, the hardness of the upper layer 10 and the lower layer 30 of the sole is required to be greater than that of the middle layer 20 of the sole. As a preferred option, the hardness of the upper layer 10 and the lower layer 30 of the sole is 40D, and the hardness of the middle layer 20 of the sole is 30D. The middle layer 20 of the sole is relatively soft, which can ensure the deformation of the protrusion 11 and also play a good cushioning role.
[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.
Claims
1. A shoe sole, characterized in that: The shoe includes an upper sole (10), a middle sole (20), and a lower sole (30) connected in sequence. The hardness of the upper sole (10) and the lower sole (30) is greater than that of the middle sole (20). The bottom surface of the upper sole (10) is provided with a number of protrusions (11) distributed at intervals along its length. The angle A between the front side of the protrusion (11) and the bottom surface of the upper sole (10) is smaller than the angle B between the rear side of the protrusion (11) and the bottom surface of the upper sole (10). The middle sole (20) is provided with grooves that are adapted to the protrusions (11).
2. The sole according to claim 1, characterized in that: The angle B between the rear side of the protrusion (11) and the bottom surface of the upper layer (10) of the sole is 90°.
3. The sole according to claim 2, characterized in that: The angle A between the front side of the protrusion (11) and the bottom surface of the upper layer (10) of the sole is 60°.
4. The sole according to claim 1, characterized in that: At least the front side of the protrusion (11) is an arc-shaped surface.
5. The sole according to claim 1, characterized in that: The hardness of the upper layer (10) and the lower layer (30) of the sole is 40D, and the hardness of the middle layer (20) of the sole is 30D.
6. The sole according to claim 1, characterized in that: The upper layer (10), middle layer (20), and lower layer (30) of the sole are all made of TPEE.
7. The sole according to claim 1, characterized in that: The protrusion (11) is composed of a number of serrated nails (12) spaced apart along the width of the sole.
8. The sole according to claim 1, characterized in that: The bottom surface of the lower layer (30) of the shoe sole is also provided with an outsole (40).
9. A running shoe, characterized in that: The sole includes the sole as described in any one of claims 1-8.