Plane-symmetric ski board with r curved surface side wall

Abstract

To provide novel plane-symmetric ski boards which have smooth sole surfaces in continuation to the outside of each of left and right two ski boards and couple side walls having constant R type curved surfaces.SOLUTION: Metallic edges embedded in outside parts of a pair of conventional ski board structures are eliminated, R type curved plates are horizontally continuously disposed in an outside direction with the same plate material, and R curved surface parts of rear surfaces (sole surfaces) of the ski boards are finished on smooth surfaces without discontinuation from flat plates. Also, across the ski total length, metal edging metal fittings are embedded and fitted in an entire inside length direction of the left and right plates across the ski total length. Warped structures (shoveling structures) are curved surfaces whose cross sections have constant R radii. The sole surfaces of an inside flat part and an outside shoveling part structure adjacent to each other smoothly continue.SELECTED DRAWING: Figure 2

Description

Detailed Description of the Invention [Technical Field]

[0001] The present invention relates to a new, symmetrical ski with a structure in which sidewalls with smooth sole surfaces and a constant R curved surface are connected to the outside of each of the two skis. [Background technology]

[0002] Traditional skis have been made longer to allow for stable, straight descents, while more recent trends have focused on easier turning, with skis as short as 68cm, or skis with extremely wide tips and tails and narrowed centers to about boot width in an attempt to reduce the turning radius. However, all of these skis have metal edges embedded around the underside of the ski, which require the skier to push the outside edge of the turn outward at the beginning of the turn by lifting it off the snow surface and pushing it outward to generate rotational force to the outside of the turn. However, this maneuver is often hindered by hidden resistance or obstacles such as hard snow blocks, pebbles, or bush roots, often resulting in falls and injuries. Furthermore, if the length is shortened to 60cm like the latest "short skis," the ability to handle uneven snow surfaces in the direction of travel is lost. Furthermore, the ability to handle steep slopes and mogul slopes also deteriorates. [Prior art documents]

[0003] Commercially available skis and previous literature only have symmetrical shapes, and although there are many commercial products and literature that have been modified in terms of the shape in the length direction or thickness direction, there are no references to a special structure that is asymmetrical and has an R-curved shape on the side. Published Utility Model No. 154978, Showa 61: There is an example in which the thickness of the left and right skis is linearly tapered so that the inside is thicker, and weight is applied to the inside of both skis, allowing the edges to bite into the inside, but neither of these structures creates a function that makes turning easier. At ordinary ski resorts, the edges are often covered by the snow surface, such as snow blocks, brush, and pebbles buried in the snow, making them invisible. Only when the ski passes over the snow surface do these obstacles to the edges become an obstacle, posing a risk of causing a fall. Skiers therefore look for skis that allow for smooth, safe rotational descents. Summary of the Invention

[0004] The present invention was made in consideration of these problems and issues, and by using skis based on the new concept of the present invention, it is possible to turn not only on groomed slopes, but also on ungroomed slopes, fresh snow, deep snow, and steep slopes with severe moguls. [Means for solving the problem] .

[0005] In order to solve the above problems, the new ski unit described in claim 1 eliminates the metal edges embedded in the outer parts of the conventional pair of ski structures, and has a structure in which R-shaped curved plates made of the same plate material are arranged continuously on the left and right in the outward direction, and the back surface of the ski (sole surface) is finished from a flat plate to a smooth surface with no breaks in the R-shaped curved surface.

[0006] The present invention of claim 2 is the same as claim 1, in which metal edging fittings are embedded and attached to the entire length of the inner sides of the left and right skis in the longitudinal direction.

[0007] Furthermore, the curved structure described in claim 3 (hereinafter referred to as the shoveling structure) has a cross section that is a curved surface with a constant R radius, and the sole surfaces of the adjacent inner flat portions and the outer shoveling portion structure are smoothly continuous. [Effects of the Invention]

[0008] The novel ski unit described in claim 1, constructed as described above, is an asymmetric ski in which the sole surface is smoothly connected to side skis with R-curved surfaces on the left and right outer sides of a flat ski. The main purpose is to provide skis that allow for smooth and easy rotational descent on steep slopes without falling due to resistance from the snow surface or obstacles on the outer ski side of the rotation, making it easy and safe to ski. 1. The front and rear tips of each ski have a shoveling structure carved into the surface of the ski, allowing for free forward and backward movement by leaning your weight forward or backward. This creates an upward resistance when the front or rear of the ski hits fresh snow, increasing safety from tipping forward or backward. 2) Metal edging hardware is attached only to the inside of the left and right skis. Because there are no outside edges, the outside edges have the function of preventing accidental falls due to resistance from catching on the snow surface. ▲3▼The opposite side of the inside edge is chafed (curved) on the surface (upper side) of the board. This prevents the outside edge from sinking into the snow and eliminates the risk of falling. ▲4▼This R-curved shoveling structure has a curved cross section with a constant R radius, and the sole surface is smoothly continuous with the adjacent inner flat part, so that by simply shifting weight from side to side, a rotational sliding force is generated to the left and right without causing a fall. ▲5▼Furthermore, simply by leaning your upper body to the left or right, the point of contact of the perpendicular line from your center of gravity with the snow moves from the center of both skis to the outside along the curved R-surface, generating an external rotational force that smoothly slides the skis outward.However, because there are no edges on the outside, there is no risk of falling due to resistance from the snow surface. ▲6▼Ski length = 100-200cm, providing stable downhill and turning capabilities that can handle all types of snow (fresh snow, deep snow, uneven moguls, ice, steep slopes, etc.). [Example]

[0009] Hereinafter, examples of the present invention will be described with reference to the accompanying drawings. It should be noted that the present invention is not limited to the following examples, and various modifications can be made within the scope of the present invention.

[0010] (First embodiment) Figure 1 shows a pair of novel skis, each consisting of two flat skis connected to each other with a side board (for convenience, called a sidewall) that has a curved R-shaped cross section, and the soles are smoothly joined together.

[0011] (Second embodiment) FIG. 2 shows the same ski as in FIG. 1, but with bindings for fastening ski boots fixed near the center of gravity of the inner flat plate portion on the front side of each ski.

[0012] Figure 3 shows the backside of Figures 1 and 2, in which the backsides of sidewalls 1' and 2', each with an R-curved cross section, are smoothly and continuously connected to the outside of each of the flat plates (3', 4') of the left and right skis.

[0013] (Third embodiment) Figure 4 shows a typical example of an optimized ski, where the area and shape of the curved sidewalls are selected (7, 8) to utilize the upward resistance from the snow on the side curve wall as a force to prevent tipping over when the weight is tilted sideways, in accordance with the change in the depth of the ski sinking due to the amount and quality of snow. This is done to minimize the resistance from snow accumulation on the sidewall in the forward direction.

[0014] (Fourth embodiment) In Figure 5, slits are provided at the transitions between the curved portions on the left and right outer surfaces and the flat surface to prevent the movement of the flow prevention stoppers (9). On the other hand, no special movement slits are required for the stoppers (9)' on the left and right inner surfaces. [Brief explanation of the drawings] [Figure 1] This is a top view of the pair of skis of the first embodiment. The sidewalls are symmetrical and curve upward. [Figure 2] A shoe binding is attached and fixed near the center of gravity of the surface of the first embodiment. [Figure 3] This is a view of the ski pair of the first embodiment from the back. It is an explanatory diagram of the structure in which two skis form a downward curved surface in plane symmetry. [Figure 4]This is an explanatory diagram of a third embodiment, in which the sidewall shape is formed in a streamlined shape so as to reduce resistance from accumulated snow in the direction of travel without compromising the anti-tip effect of the sidewall of the first embodiment. [Figure 5] This is an explanatory diagram of the structure in which a ski slip-off stopper is attached by opening a slit at the boundary between the inner flat plate and the sidewall, and a cross-sectional view along line A-A'. [Explanation of symbols] 1 Right side curved section sidewall 2. Left side curved section sidewall 3. Right main ski 4. Left main ski 5. Rear shoe binding 6. Shoe tip binding 7. Left side optimized curved shape 8. Right side optimized curved shape 9. Ski fall stopper moving slit and stopper 9'···Ski Fall Stopper 10. Embedded Edge 11 Right ski lateral cross section 12 Left ski lateral cross section

Claims

1. This novel pair of left and right skis has a structure in which each of the left and right skis has a flat central part, and the front and rear tip parts are curved toward the surface of the ski, and the outsides of the left and right skis are adjacent to the central flat part and have a continuous curved (warped) part toward the surface.

2. A pair of skis according to claim 1, in which metal edging hardware is embedded and attached to the entire lower end of only the inside sides of the left and right skis.

3. A pair of skis according to claim 1, wherein the cross section of the curved portion is a curved surface with a constant radius of R, and the sole surface of the adjacent inner flat portion is smoothly continuous with the curved portion.

4. 2. A pair of skis according to claim 1, wherein a slit for moving a stopper is provided in the boundary area between the flat central plate portion and the curved portion that is curved upward.

5. A pair of skis as claimed in claims 1, 2, 3 and 4, in which the area and shape of the R-curved sidewalls are selected to optimize the streamlined shape so as to minimize resistance from snow in front of the skis without impairing the sidewalls' ability to prevent rollovers and the sliding force in the direction perpendicular to the skis (side-slip function).

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