A sole for a snowshoe and a snowshoe

Abstract

This invention discloses a sole and a skeleton boot. The sole has a sole surface at its bottom, and a heel surface is formed at the heel of the sole. The heel surface includes a first curved surface, a recessed portion, and a second curved surface distributed sequentially from back to front along the front-rear direction of the sole. The first curved surface is configured such that at least a portion of its surface is the windward side when the athlete is in a prone position. The second curved surface is configured to always be the leeward side when the athlete is in a prone position. The recessed portion is located between the first and second curved surfaces along the front-rear direction of the sole and is recessed towards the upper part of the sole relative to the first and second curved surfaces. The skeleton boot includes the aforementioned sole and a sole surface fixed to the sole, and has better hydrodynamic properties, which can reduce wind resistance when the athlete is moving.

Description

Technical Field

[0001] This invention relates to the field of steel-frame bobsleigh shoe technology, specifically to a sole and a steel-frame bobsleigh shoe. Background Technology

[0002] Skeleton is an ice sport that can reach speeds of up to 140 kilometers per hour, almost like "flying close to the ground," demanding extremely high levels of explosive power, focus, and control from the athletes. During the competition, athletes run on the ice, leap onto the skeleton, and finally lie prone on the skeleton (as shown in the image). Figure 1 As shown, athletes control their direction using their body and complete the race along a winding track; the athlete with the shortest time wins. Because skeletons travel at high speeds and the shoes generate wind resistance during the race, affecting performance, the shoes need to have low wind resistance. Summary of the Invention

[0003] The purpose of this invention is to overcome the above-mentioned defects or problems in the prior art and to provide a steel frame bobsleigh shoe sole and a steel frame bobsleigh shoe, which has better hydrodynamic performance and can reduce wind resistance when athletes are moving.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A steel-frame bobsleigh shoe sole has a sole surface at its bottom, and a heel surface is formed at the heel of the sole. The heel surface includes a first curved surface, a recessed portion, and a second curved surface distributed sequentially from back to front along the front-rear direction of the sole. The first curved surface is configured such that at least a portion of its surface is windward when the athlete is in a prone position. The second curved surface is configured such that it is always leeward when the athlete is in a prone position. The recessed portion is located between the first and second curved surfaces along the front-rear direction of the sole and is recessed upward relative to the first and second curved surfaces toward the sole.

[0006] Furthermore, the second surface is configured to intersect with the extension surface formed by the first surface extending forward along the curvature of the first surface at a position near the recess.

[0007] Furthermore, the heel surface also includes a third curved surface; the third curved surface connects to the front end of the first curved surface and extends toward the top of the sole; the area between the third curved surface and the second curved surface forms the recess.

[0008] Furthermore, the sole includes a midsole and a heel piece; the midsole forms a heel portion corresponding to the heel of the sole, and a heel piece groove is provided in the heel portion; the heel piece is embedded and fixed in the heel piece groove; the sole surface is formed by the exposed and downward-facing surface of the midsole and the downward-facing surface of the heel piece; the heel surface is formed by the downward-facing surface of the heel portion of the midsole and the downward-facing surface of the heel piece; the first curved surface and the third curved surface are provided in the heel portion of the midsole, the second curved surface and the fourth curved surface are provided in the heel piece, and the recessed portion is formed by the midsole and the heel piece.

[0009] Furthermore, the rear piece is an elliptical component whose line connecting its two focal points extends along the front-rear direction of the sole and whose rear width is greater than its front width.

[0010] Furthermore, the rear piece is embedded and fixed in the rear piece groove by means of bonding or hot melting.

[0011] Furthermore, it also includes a carbon fiber plate; the carbon fiber plate is bonded and fixed to the upper surface of the midsole.

[0012] In addition, the present invention provides a steel frame bobsleigh shoe, which includes a sole as described in any of the preceding claims and an upper fixedly connected to the sole.

[0013] As can be seen from the above description of the present invention, compared with the prior art, the present invention has the following beneficial effects:

[0014] Because skeleton athletes move at extremely high speeds while in a prone position, and skeleton boots protrude from the athlete's body, they generate wind resistance. Typically, the heel surface of a skeleton boot extends smoothly from the heel tip to the sole surface. However, this structure causes airflow to detach from the heel surface at a certain distance, creating vortices at the detachment point. These vortices create a pressure difference in the front-to-back direction at the heel, further increasing wind resistance. This application provides a first curved surface, a recessed portion, and a second curved surface on the heel surface. The first curved surface is at least partially the windward side when the athlete is in a prone position, allowing airflow to flow along it. The airflow then flows to the recessed portion, where the wall effect is disrupted, causing turbulence. A second curved surface, the leeward side, is located behind the recessed portion. It is only affected by the airflow guided by the first curved surface and does not actively move towards it. When turbulence occurs, the second curved surface further obstructs the airflow, disrupting its flow along the sole. With the cooperation of the recessed portion and the second curved surface, the airflow quickly escapes from the heel surface, reducing vortex resistance and thus lowering the wind resistance of the sole.

[0015] Meanwhile, since the second curved surface is designed as an extension of the first curved surface, the airflow will be blocked by the second curved surface after reaching the depression. The airflow will collide with the second curved surface and diffuse outward along the part of the second curved surface that forms the depression. Since the curvature of the second curved surface is larger near the depression and is lower than the first curved surface in the thickness direction of the sole, most of the airflow will move away from the sole surface, further disrupting the formation of vortices, thereby improving the hydrodynamic performance of the skeleton boot and reducing the wind resistance when the athlete is moving.

[0016] The heel surface is provided with a third curved surface, which allows the recessed part to connect with the first and second curved surfaces. When the airflow reaches the recessed part, it will not be able to form a vortex due to the incompleteness of the recessed part on the heel surface, thereby reducing the vortex resistance generated by the sole.

[0017] The rear piece is roughly elliptical in shape and has a wider rear side, which can intercept most of the airflow at the heel end.

[0018] Carbon fiber plates provide excellent support for steel-framed bobsleigh boots, preventing energy loss due to deformation during the run-up phase when athletes exert force. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments are briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 The pose of the athlete lying prone on a skeleton;

[0021] Figure 2 This is a cross-sectional schematic diagram and a partial enlarged view of the sole of the steel-framed bobsleigh shoe in the embodiment;

[0022] Figure 3 This is a schematic diagram of the sole structure of the steel-framed bobsleigh boots in the embodiment;

[0023] Figure 4 This is a partial structural diagram of the heel section of the midsole of the steel-framed bobsleigh shoe in the embodiment.

[0024] Explanation of key figure labels:

[0025] Steel frame bobsleigh boot 10; midsole 11; first curved surface 111; rear panel groove 112; third curved surface 113; rear panel 12; second curved surface 121; recessed portion 13. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are preferred embodiments of the present invention and should not be considered as excluding other embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0027] Unless otherwise expressly defined, the use of terms such as "first," "second," or "third" in the claims, description, and accompanying drawings of this invention is for distinguishing different objects and not for describing a specific order.

[0028] Unless otherwise expressly defined, in the claims, description, and accompanying drawings of this invention, the use of directional terms such as "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," and "counterclockwise" to indicate orientation or positional relationships is based on the orientation and positional relationships shown in the accompanying drawings and is only for the convenience of describing the invention and simplifying the description, and is not intended to indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the specific scope of protection of this invention.

[0029] Unless otherwise expressly defined, the terms "fixed connection" or "fixed connection" used in the claims, description and drawings of this invention should be interpreted broadly to refer to any connection in which there is no displacement or relative rotation relationship between the two parties, including non-removable fixed connection, detachable fixed connection, integral connection and fixed connection by other means or components.

[0030] In the claims, description and accompanying drawings of this invention, the terms "comprising," "having," and variations thereof are used to mean "including but not limited to."

[0031] See Figure 1 , Figure 1 The image shows the posture of the skeleton boots when the athlete is lying prone on the skeleton, with the soles of the boots tilted to the ice surface.

[0032] This embodiment provides a steel-framed bobsleigh shoe 10, which includes a sole and an upper fixedly connected to the sole. The sole includes a midsole 11, a heel counter 12, and a carbon fiber plate (not shown in the figure).

[0033] Reference Figure 3 and Figure 4The sole has a downward-facing sole surface, which forms a heel surface at the heel of the corresponding sole. This heel surface can be roughly regarded as the area of ​​the sole surface from the rear end of the sole to the mid-waist of the sole, including part of the side of the rear end of the sole. However, in this embodiment, it is regarded as part of the heel surface of the sole surface.

[0034] In this embodiment, the heel surface includes a first curved surface 111, a recessed portion 13, and a second curved surface 121 distributed sequentially from back to front along the front-rear direction of the sole. The first curved surface 111 is configured such that at least a portion of its surface is the windward side when the athlete is in a prone position. The second curved surface 121 is configured to always be the leeward side when the athlete is in a prone position. The recessed portion 13 is located between the first curved surface 111 and the second curved surface 121 along the front-rear direction of the sole, and is recessed towards the upper part of the sole relative to the first curved surface 111 and the second curved surface 121. In addition, the heel surface also includes a third curved surface 113, which connects to the front end of the first curved surface 111 and extends towards the upper part of the sole, and the area between the third curved surface 113 and the second curved surface 121 forms the aforementioned recessed portion 13.

[0035] It should be noted that the standard posture is a person wearing the above-mentioned steel frame bobsleigh boots 10 and standing on the ground. In this standard posture, the "below" of the sole refers to the direction in which the sole faces the ground, the "above" of the sole refers to the direction in which the sole faces away from the ground, the upper surface of the sole is the side of the sole facing away from the ground, and the lower surface of the sole is the side of the sole facing the ground. The front-back direction of the sole refers to the direction in which the length of the sole extends, the direction in which the toe points is forward, and the left-right direction refers to the direction in which the width of the sole extends.

[0036] Specifically, refer to Figures 2 to 4 The midsole 11 of the shoe sole is made of EVA material, forming a heel portion at the corresponding heel position, and a heel plate groove 112 is provided in the heel portion. The heel plate 12 is embedded and fixed in the heel plate groove 112. The heel plate 12 can be fixed by bonding or melting. The material of the heel plate 12 can be rubber, which serves to increase the friction of the shoe sole. It should be noted that in other embodiments, the shoe sole may not include the midsole 11 and the heel plate 12, but the midsole 11 and the heel plate 12 are integrally formed to form the midsole 11 in the conventional concept. This application does not limit the formation or mating method of the first curved surface 111, the second curved surface 121 and the third curved surface 113 on the shoe sole, as long as the above-mentioned first curved surface 111, second curved surface 121 and third curved surface 113 can be formed.

[0037] The aforementioned sole surface is formed by the exposed and downward-facing surface of the midsole 11 and the downward-facing surface of the rear piece 12 in this embodiment. The heel surface is formed by the downward-facing surface of the heel portion of the midsole 11 and the downward-facing surface of the rear piece 12. The first curved surface 111 and the third curved surface 113 are provided on the heel portion of the midsole 11, the second curved surface 121 is provided on the rear piece 12, and the recessed portion 13 is formed by the midsole 11 and the rear piece 12.

[0038] Specific reference Figure 2 In the enlarged portion of the heel surface, the heel portion of the midsole 11 smoothly extends from the rear end of the sole towards the bottom of the sole to form a first curved surface 111. The front end of the first curved surface 111 is approximately at the edge of the area where the sole contacts the ground. A third curved surface 113 connects to the front end of the first curved surface 111. The curvature of the third curved surface 113 increases sharply compared to the first curved surface 111 and extends upward towards the sole. The second curved surface 121 is configured to intersect with the extension surface formed by the first curved surface 111 extending forward along its own curvature near the recess 13. (See reference [reference needed] for details.) Figure 2 The second curved surface 121 extends smoothly from the recessed portion 13 toward the front end of the sole and then gradually transitions to a state that is roughly parallel to the ground; wherein the gap between the third curved surface 113 and the second curved surface 121 forms the aforementioned recessed portion 13.

[0039] For ease of understanding, it can be assumed that the first curved surface 111 has an extension surface, which is formed by the first curved surface 111 extending a certain distance toward the front end of the sole with its own curvature. The third curved surface 113 is located above the extension surface in the sole thickness direction. The extension shape of the second curved surface 121 allows the extension surface to intersect with the extension surface near the recess 13. This intersection indicates that a part of the second curved surface 121 is located below the extension surface in the sole thickness direction.

[0040] Because skeleton athletes move at extremely high speeds while in a prone position, and the skeleton boots (10) protrude from the athlete's body, they generate wind resistance. Typically, the heel surface of the skeleton boot (10) extends smoothly from the heel tip to the sole surface. However, this structure causes airflow to detach from the heel surface at a certain distance, creating vortices at the detachment point. These vortices create a pressure difference in the front-to-back direction at the heel, thus increasing wind resistance.

[0041] This application provides a first curved surface 111, a recessed portion 13, and a second curved surface 121 on the heel surface. The first curved surface 111 is at least partially the windward side when the athlete is in a prone position. The windward side allows airflow to flow along the first curved surface 111. The airflow then flows to the recessed portion 13. Due to the presence of the recessed portion 13, the adhesion effect of the airflow is disrupted, and the airflow begins to form turbulence at this point. At the same time, the second curved surface 121 is provided behind the recessed portion 13. The second curved surface 121 is the leeward side, which is only affected by the airflow guided by the first curved surface 111 and will not actively face the airflow. When the airflow forms turbulence, the second curved surface 121 also blocks the airflow, thereby disrupting the airflow along the front-to-back direction of the sole. With the cooperation of the recessed portion 13 and the second curved surface 121, the airflow will quickly detach from the heel surface and reduce the vortex resistance caused by the formation of vortices, thereby reducing the wind resistance of the sole.

[0042] Meanwhile, since the second curved surface 121 is set as an extension surface protruding from the first curved surface 111, the airflow will be blocked by the second curved surface 121 after reaching the recess 13. The airflow will collide with the second curved surface 121 and diffuse outward along the part of the second curved surface 121 that forms the recess 13. Since the curvature of the second curved surface 121 is larger near the recess 13 and is lower than the first curved surface 111 in the thickness direction of the sole, most of the airflow will move away from the sole surface, further disrupting the formation of vortices, thereby improving the hydrodynamic performance of the steel frame bobsleigh boot 10 and reducing the wind resistance when the athlete is moving.

[0043] Furthermore, the rear piece 12 is configured as an elliptical component with the line connecting the two focal points extending along the front-to-back direction of the sole and the rear width being greater than the front width. Its specific structure can be found in [reference needed]. Figure 3 Here, the rear width refers to the width of the rear piece 12 near the rear end of the sole, and the front width refers to the width of the rear piece 12 near the midsection of the sole. Figure 3 As can be seen, the rear width is slightly wider than the front width. This is because the rear end of the rear piece 12 is the front line position that comes into contact with the airflow, making this area wider. This allows most of the airflow to diffuse outward, preventing it from moving along the sole surface to the midfoot and forefoot areas. It should be noted that the rear piece 12 described above is not a regular elliptical shape in this embodiment. However, the extension direction of the rear piece is defined here by the focal point of the ellipse. Those skilled in the art can clearly understand from the accompanying drawings and the above description that the rear piece is mounted on the midsole 11 with its major axis aligned with the forefoot direction of the sole.

[0044] In this embodiment, a carbon fiber plate is also attached and fixed to the upper surface of the midsole 11. The carbon fiber plate provides good support for the steel frame bobsleigh shoe 10, preventing energy loss due to deformation when the athlete exerts force during the approach run.

[0045] The foregoing description of the specifications and embodiments is intended to explain the scope of protection of this invention, but does not constitute a limitation on the scope of protection of this invention. Modifications, equivalent substitutions, or other improvements to the embodiments of this invention or a portion thereof that can be obtained by those skilled in the art through logical analysis, reasoning, or limited experimentation, based on the teachings of this invention or the foregoing embodiments, in conjunction with common knowledge, general technical knowledge, and / or existing technology, should all be included within the scope of protection of this invention.

Claims

1. The sole of a steel-framed bobsleigh shoe, characterized in that, The sole has a sole surface at its bottom, and the sole surface forms a heel surface corresponding to the heel of the sole; the heel surface includes a first curved surface (111), a recess (13), and a second curved surface (121) distributed sequentially from back to front along the front-back direction of the sole; the first curved surface (111) is configured such that at least a portion of its surface is the windward side when the athlete is in a prone position; the second curved surface (121) is configured such that it is always the leeward side when the athlete is in a prone position; the recess (13) is located between the first curved surface (111) and the second curved surface (121) along the front-back direction of the sole. The heel surface is recessed above the sole relative to the first curved surface (111) and the second curved surface (121); the second curved surface (121) is configured to intersect with the extension surface formed by the first curved surface (111) extending forward along the curvature of the first curved surface (111) at a position close to the recess (13); the heel surface also includes a third curved surface (113); the third curved surface (113) is connected to the front end of the first curved surface (111) and extends above the sole; the area between the third curved surface (113) and the second curved surface (121) forms the recess (13).

2. A sole for a steel framed snowboard shoe as defined in claim 1, wherein The sole includes a midsole (11) and a heel piece (12); the midsole (11) forms a heel portion corresponding to the heel of the sole, and a heel piece groove (112) is provided in the heel portion; the heel piece (12) is embedded and fixed in the heel piece groove (112); the sole surface is formed by the exposed and downward surface of the midsole (11) and the downward surface of the heel piece (12); the heel surface is formed by the downward surface of the heel portion of the midsole (11) and the downward surface of the heel piece (12); the first curved surface (111) and the third curved surface (113) are provided in the heel portion of the midsole (11), the second curved surface (121) is provided in the heel piece (12), and the recessed portion (13) is formed by the midsole (11) and the heel piece (12).

3. A sole for a steel framed snowboard shoe as defined in claim 2, wherein, The rear piece (12) is an elliptical component whose two focal points are connected by a line extending along the front-rear direction of the sole and whose rear width is greater than its front width.

4. The sole of a steel-framed bobsleigh shoe as described in claim 3, characterized in that, The rear piece (12) is embedded and fixed in the rear piece groove (112) by means of adhesive bonding or hot melting.

5. The sole of a steel-framed bobsleigh shoe as described in claim 2 or 3, characterized in that, It also includes a carbon fiber plate; the carbon fiber plate is attached and fixed to the upper surface of the midsole (11).

6. A steel framed snowboard shoe characterized by, It includes the sole of the steel-framed bobsleigh shoe as described in any one of claims 1-5 and the upper fixedly connected to the sole.

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