Last

Abstract

The utility model discloses a kind of shoe trees, including forefoot, forefoot includes oppositely arranged inner side end and outer side end, and the first near ground side being arranged between inner side end and outer side end, the middle of first near ground side is protrudingly arranged to the direction of ground, compared with standard shoe tree, the protruding amplitude of first near ground side increases.The shoe tree of the utility model increases the amplitude of first near ground side protruding to the direction of ground, to comply with the form that foot forefoot bottom protrudes downward, increase the contact area of forefoot and sole, i.e. increase the contact area of forefoot and ground, improve the stability of human forefoot in the process of movement.

Description

Technical Field

[0001] This utility model relates to the field of footwear, and more particularly to a shoe last. Background Technology

[0002] In recent years, trail running has gradually become a popular sport worldwide. Trail running is a medium- to long-distance run conducted in natural outdoor environments, requiring runners to cope with changes in the natural environment, such as road surface, weather, and altitude. It has a positive effect on improving physical fitness, strengthening willpower, and relieving stress. According to the classification of trail running events by the International Trail Running Association, they can be divided into beginner, intermediate, long-distance, and extreme trail races. A few elite runners choose racing shoes to pursue performance, while most amateur runners focus on the versatility of all-terrain shoes. Therefore, trail running shoes should be specifically designed to meet the needs of runners of different levels and in different distances and scenarios.

[0003] However, the shortcomings of existing all-terrain trail running shoes are twofold: firstly, they do not take into account the needs of sports characteristics and the level of trail runners to make differentiated designs; secondly, all-terrain trail running shoes focus more on the comfort of the upper and sole, while the last optimization points are not systematically adjusted based on foot shape characteristics and sports characteristic data.

[0004] Therefore, it is necessary to design an all-terrain trail running shoe last that takes into account different race scenarios, runner abilities, environmental variables, and the principles of sports biomechanics, to increase fit and improve athletic functionality, and promote the transformation of trail running shoes from passive protection to active performance enhancement. Utility Model Content

[0005] The purpose of this invention is to provide a shoe last that increases the contact area between the forefoot and the ground, raises the midfoot height, and reduces the midfoot lateral width, thereby improving both fit and athletic performance. The specific technical solution is as follows:

[0006] A shoe last includes a forefoot, which includes an inner end and an outer end disposed opposite to each other, and a first ground side disposed between the inner end and the outer end. The middle of the first ground side protrudes in the direction of the ground, and the protrusion of the first ground side is increased compared to a standard shoe last.

[0007] Furthermore, the lowest point is the end of the first ground side closest to the ground. Compared to the standard shoe last, the lowest point of the first ground side is lowered by 2.5mm to 3.5mm.

[0008] Furthermore, it also includes a midfoot connected to the forefoot, with a second ground side positioned close to the ground, which is more distant from the ground than a standard shoe last.

[0009] Furthermore, this also includes the midfoot, which connects to the forefoot; compared to a standard shoe last, the distance between the medial and lateral sides of the midfoot is reduced.

[0010] Furthermore, the distance between the second near-ground side and the ground is set to 9mm to 12mm.

[0011] Furthermore, the distance between the medial side and the lateral side of the midfoot is set to 49mm to 52mm.

[0012] Furthermore, the forefoot, including the toe area, has a reduced distance from the ground compared to a standard shoe last.

[0013] Furthermore, the distance between the toe area and the ground is set to 19mm to 21mm.

[0014] Furthermore, it also includes a heel corresponding to the forefoot, with a third ground side positioned close to the ground. Compared to a standard shoe last, the distance between the third ground side and the ground is reduced.

[0015] Furthermore, compared to the standard shoe last, the distance between the third ground side and the ground is reduced by 1.5mm to 2.5mm.

[0016] The shoe last of this utility model has the following advantages:

[0017] 1. By increasing the amplitude of the first ground-facing side protruding towards the ground, the shape of the forefoot protruding downwards is conformed to the shape of the foot's forefoot bottom, increasing the contact area between the forefoot and the sole of the shoe, that is, increasing the contact area between the forefoot and the ground, and improving the stability of the human forefoot during movement.

[0018] 2. By increasing the distance between the second proximal side and the ground, and reducing the distance between the medial and lateral sides of the midfoot, better fit is provided for the human foot, thereby reducing the load on the foot in the direction perpendicular to the ground and the amplitude of internal pronation when the foot contacts the ground, enhancing foot stability and preventing injury.

[0019] 3. The reduced distance between the toe area of ​​the shoe last and the ground creates a lower toe angle, which helps to increase the contact area of ​​the forefoot during the push-off phase, enhances dynamic foot stability, reduces injuries such as ankle sprains, and also helps to maintain a more economical running posture and gait.

[0020] 4. By reducing the distance between the third proximal side and the ground, the heel difference is reduced, thereby effectively reducing the load on the knee joint and helping to reduce the risk of injuries such as iliotibial band syndrome. Attached Figure Description

[0021] Figure 1 This is a side view comparison diagram of the shoe last of this utility model and the standard shoe last.

[0022] Figure 2 This is a schematic diagram comparing the forefoot of the shoe last of this utility model with that of a standard shoe last.

[0023] Figure 3 It is along Figure 1 A cross-sectional view of midline segment A.

[0024] Figure 4 This is a top-view comparison diagram of the shoe last of this utility model and a standard shoe last.

[0025] Figure 5 This is another side view comparison diagram of the shoe last of this utility model and the standard shoe last.

[0026] Figure 6 This is a diagram illustrating the difference in shoe heel height.

[0027] Figure 7 This is a schematic diagram of the experimental sample shoe of the shoe last of this utility model. Detailed Implementation

[0028] To better understand the purpose, structure, and function of this utility model, the shoe last of this utility model will be described in detail below with reference to the accompanying drawings.

[0029] like Figures 1 to 5 As shown, the green line represents the shoe last of this embodiment, and the red line represents the standard shoe last 400. The shoe last of this invention includes a forefoot 100, a midfoot 200, and a heel 300 connected sequentially, corresponding to a human foot model. The forefoot 100 includes an inner end 101 and an outer end 102 opposite to each other. The inner end 101 corresponds to the inner side of the human foot, and the outer end 102 corresponds to the outer side of the human foot. A first near-ground side 103 is formed between the inner end 101 and the outer end 102. The first near-ground side 103 corresponds to the side of the forefoot facing the ground. The inner end 101 and the outer end 102 are connected... The line connecting the side ends 102 is defined as the lateral direction of the shoe last. In the lateral direction, the middle of the first near-ground side 103 protrudes towards the ground, that is, the first near-ground side 103 forms a downward protruding arc in the lateral direction. This arc includes both standard arcs with equal radius and similar arc structures such as a protrusion in the middle that is more prominent than the inner end 101 and the outer end 102. Compared with the standard shoe last 400, the first near-ground side 103 protrudes more towards the ground.

[0030] The purpose of this structure is that during trail running, the human body is affected by the undulations of the ground, resulting not only in forward and backward movement but also in lateral and perpendicular movements. Consequently, after long-distance trail running, the body's physical fitness declines and muscle fatigue accumulates. The body instinctively reduces airtime and stride length, naturally leading to a relatively higher stride frequency. Actively increasing stride frequency to maintain forward momentum minimizes center of gravity shift and limits the effects of pain and mechanical stress on the ground, resulting in a safer and more stable running posture. Furthermore, with increased stride frequency... Although the impact force of each step is reduced by the increase in the number of times the foot touches the ground, the frequency of contact with the ground increases, which means that the forefoot bears more pressure. By increasing the contact area between the forefoot and the sole, these pressures can be distributed more evenly, thereby reducing excessive pressure on the metatarsophalangeal joints and other parts, and reducing the risk of pain or injury. Therefore, the first ground-protruding side 103 protrudes more in the direction of the ground, which can conform to the downward convex shape of the bottom of the forefoot, increase the contact area between the forefoot 100 and the sole, that is, increase the contact area between the forefoot and the ground, and improve the stability of the forefoot during movement.

[0031] Furthermore, such as Figure 2 As shown, the lowest point 104 is the end of the arc-shaped first ground side 103 closest to the ground. Compared with the same point 401 on the standard shoe last 400, the lowest point of the first ground side 103 is lowered by 2.5mm to 3.5mm in the direction of the ground. The position setting of this lowest point 104 can make the human body clearly perceive the landing point, identify the ground condition more quickly, enhance landing confidence, and will not excessively weaken the cushioning effect.

[0032] Preferred, such as Figure 3 As shown, the shoe last 200 has a second ground-prone side 201 positioned close to the ground between the inner and outer sides. Compared to the standard shoe last 400, the distance between the second ground-prone side 201 and the ground is increased. In other words, the second ground-prone side 201 is adjusted upwards from the same position on the standard shoe last 400, thereby increasing arch support during running, reducing arch collapse during long-distance running, and improving athletic performance. Furthermore, as... Figure 4 As shown, compared to the standard last size 400, the distance between the inner and outer sides of the midfoot 200 is reduced. By adjusting the shape of the midfoot 200 last, the shoe's internal space and the fit of the midfoot are enhanced, improving the foot's fit during uphill and downhill running, reducing the foot's spatial displacement within the shoe cavity, and preventing frequent slippage that could cause foot damage.

[0033] Specifically, compared to running on smooth surfaces, trail running involves longer distances and more complex terrain. Long-distance trail running can easily induce muscle injuries, impaired muscle contraction, and failure of autonomic activation of the central nervous system, leading to muscle fatigue and altered neuromuscular function. This results in increased ground impact on the feet, increasing tibial acceleration. At this point, the body tends to increase the flexion of the lower limbs and the plantar flexion to counteract the decreased cushioning capacity of muscle tissue due to muscle fatigue. In other words, after long-distance trail running, the height of the navicular bone decreases, and the support and cushioning function of the arch of the foot will be significantly reduced. Furthermore, trail running includes many uphill and downhill sections, resulting in significant cumulative elevation gain. Uphill sections, in particular, reduce airtime, increase stride frequency and energy consumption, and increase oxygen consumption and lateral acceleration of the foot. Downhill sections alter joint movement direction and increase peak tibial acceleration, further increasing the risk of joint injury. By increasing the distance between the second proximal side 201 and the ground, and reducing the distance between the medial side and the lateral side of the midfoot 200, the human foot is provided with better fit, thereby reducing the load on the foot in the direction perpendicular to the ground and the amplitude of internal rotation when the foot contacts the ground, enhancing foot stability and preventing injury.

[0034] Preferably, in the lateral direction, the second ground-proximal side 201 of the midfoot 200 has an arc-shaped structure protruding towards the ground. The end of this arc-shaped structure closest to the ground has a lowest point 202. Compared to the same position 402 on the standard shoe last 400, this lowest point 202 is adjusted 1.5mm to 2.5mm away from the ground, thus setting the distance between the second ground-proximal side 201 and the ground to 9mm to 12mm. Furthermore, compared to the standard shoe last 400, the inner and outer sides of the midfoot 200 are respectively tapered towards the center by 1.5mm to 2.5mm, thus setting the distance 203 between the inner and outer sides of the midfoot 200 to 49mm to 52mm. This parameter setting allows the shoe made from this shoe last to enhance the support and fit of the midfoot 200, while also improving comfort and fit.

[0035] Furthermore, such as Figure 5 As shown, the forefoot 100 includes a toe region 105, which is located on the side of the forefoot 100 away from the midfoot 200, equivalent to the toes of the human foot. Compared to the standard shoe last 400, the distance between the toe region 105 and the ground is reduced, that is, the vertical distance between the toe region 105 and the ground is shortened, which increases the contact area of ​​the forefoot and midfoot during landing and push-off, improves foot stability during push-off, and reduces the risk of foot and ankle injuries.

[0036] Specifically, compared to running on smooth surfaces, trail running involves significantly more forefoot contact with the ground due to the uneven terrain. Excessive toe lift increases the load on lower limb muscles, thus increasing the risk of ankle sprains. This is especially true for average runners who lack sufficient ankle strength. To cope with long-distance trail running, they require greater foot control from their running shoes. A reduced distance between the toe area (105) and the ground, resulting in a lower toe lift, helps increase the forefoot contact area during the push-off phase, enhancing dynamic foot stability and reducing ankle sprains and other injuries. It also helps maintain a more economical running posture and gait.

[0037] Preferably, the vertical height of the toe area 105 from the ground is reduced by 2mm to 3mm, and the distance 106 between the toe area 105 and the ground is set to 19mm to 21mm, so as to improve athletic performance while protecting the human foot.

[0038] Furthermore, a third near-ground side 301 is formed between the inner and outer sides of the heel 300 of the shoe last. This third near-ground side 301 corresponds to the side of the human heel 300 closest to the ground. Compared to the standard shoe last 400, the distance between the third near-ground side 301 and the ground is reduced. In other words, the third near-ground side 301 is lowered from the same position on the standard shoe last 400, thereby reducing the thickness of the heel 300 of the sole made from this shoe last, and thus reducing the heel difference. Figure 6 As shown, the heel difference refers to the difference between the forefoot thickness 501 and the heel thickness 502 of the sole.

[0039] Specifically, heel drop affects a runner's biomechanics and running experience, especially in trail running where forefoot strike is more common. Heel drop influences gait, landing pattern, and impact distribution. A higher heel drop makes runners more prone to heel strike, increasing impact on the knees. Furthermore, an excessively high heel drop increases the load on the knees and hips, thus increasing the risk of arthritis or other related conditions. Reducing the distance between the third proximal side (301) and the ground reduces heel drop, effectively lowering knee load and helping to reduce the risk of injuries such as iliotibial band syndrome.

[0040] Preferably, compared to the standard last 400, the distance between the third ground side 301 and the ground is reduced by 1.5mm to 2.5mm, so that the sole made from this last has a heel drop of 7mm to 9mm, thereby reducing the impact on the knee joint during trail running. At the same time, the heel drop under this parameter setting will not increase the pressure on the ankle and forefoot, avoiding the risk of sprains or other related injuries.

[0041] The shoe last in this embodiment is US size 9. The existing standard shoe last 400, which is compared with it in terms of structural size, is also US size 9. Since there is a unified grading standard between different sizes, the adjustment range corresponding to the complete parameters mentioned above will not change due to the change of shoe last size. That is, the corresponding structural parameters of the shoe last in this embodiment according to the unified grading standard are all within the scope of protection of this utility model.

[0042] Specific experimental details: such as Figure 7 As shown, the shoes made using the last described in the above embodiment were used as experimental sample shoes. Three testers, all in US size 9, were required to run both road and trail running in test environments such as sand, mud, and rain. They were required to complete at least 200 kilometers of test running within 30 days, including at least one trail run of more than 30 kilometers. After completion, each tester was surveyed individually, and a quantitative score was given based on the questionnaire content. The professional test results for this round of sample shoes using the new last were satisfactory. Approximately 67% of the runners reported that the experimental sample shoes made with this last had good arch support and fit, and the satisfaction level met the standard.

[0043] The shoe last of this utility model has the following advantages:

[0044] 1. By increasing the amplitude of the first ground-facing side protruding towards the ground, the shape of the forefoot protruding downwards is conformed to the shape of the foot's forefoot bottom, increasing the contact area between the forefoot and the sole of the shoe, that is, increasing the contact area between the forefoot and the ground, and improving the stability of the human forefoot during movement.

[0045] 2. By increasing the distance between the second proximal side and the ground, and reducing the distance between the medial and lateral sides of the midfoot, better fit is provided for the human foot, thereby reducing the load on the foot in the direction perpendicular to the ground and the amplitude of internal pronation when the foot contacts the ground, enhancing foot stability and preventing injury.

[0046] 3. The reduced distance between the toe area of ​​the shoe last and the ground creates a lower toe angle, which helps to increase the contact area of ​​the forefoot during the push-off phase, enhances dynamic foot stability, reduces injuries such as ankle sprains, and also helps to maintain a more economical running posture and gait.

[0047] 4. By reducing the distance between the third proximal side and the ground, the heel difference is reduced, thereby effectively reducing the load on the knee joint and helping to reduce the risk of injuries such as iliotibial band syndrome.

[0048] The terms “above,” “below,” and “within” as used above include the number itself; the terms “exceeding” and “excluding” do not include the number itself.

[0049] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made to the above embodiments by those skilled in the art after reading this specification are all within the scope of protection of the present invention. The various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, the embodiments of the present invention will not further describe various possible combinations.

[0050] If the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

Claims

1. A shoe last, characterized in that, It includes a forefoot, which includes an inner end and an outer end that are positioned opposite each other, and a first ground side that is positioned between the inner end and the outer end. The middle of the first ground side protrudes in the direction of the ground, and the protrusion of the first ground side is increased compared to a standard shoe last.

2. The shoe last as described in claim 1, characterized in that, The lowest point is the end of the first ground side closest to the ground. Compared to the standard shoe last, the lowest point of the first ground side is lowered by 2.5mm to 3.5mm.

3. The shoe last as described in claim 1, characterized in that, It also includes the midfoot connected to the forefoot, which has a second ground side positioned close to the ground, with the distance between the second ground side and the ground increased compared to the standard shoe last.

4. The shoe last as described in claim 1 or 3, characterized in that, It also includes the midfoot, which connects to the forefoot. Compared to the standard shoe last, the distance between the inner and outer sides of the midfoot is reduced.

5. The shoe last as described in claim 3, characterized in that, The distance between the second near-ground side and the ground is set to 9mm to 12mm.

6. The shoe last as described in claim 4, characterized in that, The distance between the medial and lateral sides of the midfoot is set to 49 mm to 52 mm.

7. The shoe last as described in claim 1, characterized in that, The forefoot includes the toe area, and compared to a standard shoe last, the distance between the toe area and the ground is reduced.

8. The shoe last as described in claim 7, characterized in that, The distance between the toe area and the ground is set to 19mm to 21mm.

9. The shoe last as described in claim 1, characterized in that, It also includes a heel corresponding to the forefoot, with a third ground side positioned close to the ground. Compared to the standard shoe last, the distance between the third ground side and the ground is reduced.

10. The shoe last as described in claim 9, characterized in that, Compared to the standard shoe last, the distance between the third ground side and the ground is reduced by 1.5mm to 2.5mm.

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