JPH09308501A - Snow board boots - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise transmitting efficiency of driving force. SOLUTION: The upper part of a hard heel part 1 and the lower part of a hard leg part 11 are superimposed in the direction of before and behind and the leg hrad part 11 is freely rotatable relatively to the heel hard part 1 around an axis line L which passes a biased position outside of the symmetry plane S which makes the left and right parts of a heel part 2 symmetry and crosses the symmetry plane S, thereby transmittance of driving force is made efficient and controllability are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention relates to snowboard boots. More specifically, the present invention relates to a snowboard boot in which legs are tiltable in a traveling direction with respect to a sole or a heel.

[0002]

2. Description of the Related Art Unlike a ski using two snowboards, only one snowboard is used. The rider rides sideways on a snowboard. That is, the traveling direction of the snowboard is substantially orthogonal to the front-rear direction of the rider. Snowboard boots require rigidity and flexibility. It is required that the snowboard boot and the foot are firmly fixed to each other and that the ankle is flexible with respect to the sole.

Conventionally, the general center line of a snowboard boot (hereinafter, referred to as a general center line. The reason for adding a "general" is that the left and right shoes are not perfectly symmetrical). A snowboard boot in which upper and lower parts, particularly a heel part and a tubular part or a leg part of the upper part of the heel part are relatively rotated, is disclosed in German Laid-Open Publication No. DE 3622746A1,
It is known from JP-A-7-298902.

When such a snowboard boot is used, it is lateral to the snowboard (the direction orthogonal to the front-back direction of the rider, the forward and backward directions of the snowboard).
Moreover, it is easy for the ankle to swing or tilt integrally with the snowboard boot. A pivot is used for the rocking structure between the heel and the legs. The axis of rotation of the pivot is generally in the vertical plane containing the longitudinal line of the snowboard boot.

Snowboard boots are fixed on the snowboard. In snowboarding, the dominant foot is generally the left foot. On the left foot side, the front-rear direction line of the snowboard boot is inclined in the traveling direction, that is, the leftward direction with respect to the long axis direction of the snowboard, that is, the forward direction. The inclination angle is usually around 27 degrees. The reason for providing such an inclination angle is mainly for facilitating inclusion of the traveling direction in the visual field.

Inclination or rocking of the left foot in the traveling direction is preferably oriented in the traveling direction in order to advance the snowboard in the longitudinal direction. In the known rocking structure, the tilt direction is tilted with respect to the traveling direction. That is, in the known rocking structure, the inclination direction is inclined about 27 degrees with respect to the traveling direction. According to such a known swing / tilt structure, a loss occurs in the propulsive force for propelling the snowboard in the traveling direction.

It is known that the universal joint forming the ankle has a three-dimensional arch structure. This three-dimensional arch structure,
The legs in the upright position are hard to bend laterally. That is, this three-dimensional arch structure makes it difficult to perform a lateral tilting motion which is not combined with the anterior tilting motion of the ankle. Such a three-dimensional arch structure and a swinging / tilting structure based on an oblique mounting angle of the snowboard boot with respect to the snowboard should be considered. Such rocking / tilting structure needs to be reconsidered even in piping competitions that require a large propulsive force in the traveling direction.

[0008]

The present invention has been made based on such a technical background, and achieves the following objects.

It is an object of the present invention to provide a snowboard boot with less loss of propulsion.

Another object of the present invention is to provide a snowboard boot in which the foot easily tilts in the traveling direction.

Yet another object of the present invention is to provide a snowboard boot that diversifies the mobility of the snowboard.

[0012]

Means for Solving the Problems To solve the above-mentioned problems, the following means are adopted.

The snowboard boot of the first aspect of the present invention is a snowboard boot comprising a heel portion included in a heel portion and a leg portion located above the heel portion, wherein the heel portion and the leg portion are left and right of the heel portion. Around the axis of rotation that is included in the inclined surface whose front is inclined inward with respect to the substantially symmetric plane that makes the portion approximately symmetrical and that is inclined vertically with an angle within ± 45 degrees with respect to the horizontal direction. It is characterized by being rotatably coupled to.

The snowboard boot according to the second aspect of the present invention is a snowboard boot comprising a heel hard portion included in a heel portion and a leg hard portion located above the heel hard portion, wherein the heel hard portion and the leg hard portion are included. Is included in an inclined surface in which the front is inclined inward with respect to a substantially symmetrical surface that makes the left and right parts of the heel substantially symmetrical, and is inclined in the vertical direction at an angle of within ± 45 degrees with respect to the horizontal direction. It is characterized in that it is rotatably coupled around the axis of rotation.

A snowboard boot according to a third aspect of the present invention is the snowboard boot according to the first or second aspect, wherein a hinge portion is formed at an intersecting portion where the rotational axis intersects the heel portion and the leg portion, and the hinge portion is substantially symmetrical. It is characterized in that it is arranged at a position closer to the surface than the surface.

A snowboard boot according to a fourth aspect of the present invention is the snowboard boot according to the third aspect of the invention, wherein the biased position is toward the outer side with respect to the approximate plane of symmetry.

A snowboard boot according to a fifth aspect of the present invention is characterized in that, in the first or second aspect, the axis of rotation intersects a surface including a shoe bottom surface.

A snowboard boot according to a sixth aspect of the present invention is characterized in that, in the first or second aspect, the angle between the approximately symmetrical surface and the inclined surface is in the range of 23 degrees to 33 degrees. .

A snowboard boot according to a seventh aspect of the present invention is the snowboard boot according to the third aspect, wherein the hinge portion is made of metal.

The snowboard boot of the present invention 8 is a snowboard boot comprising a heel portion included in a heel portion and a leg portion located above the heel portion, wherein the heel portion and the leg portion are left and right of the heel portion. Around the axis of rotation that is included in the inclined surface whose front is inclined inward with respect to the substantially symmetric plane that makes the portion approximately symmetrical and that is inclined vertically with an angle within ± 45 degrees with respect to the horizontal direction. Is rotatably coupled to the hinge portion, and a hinge portion is formed at an intersecting portion where the rotation axis intersects the heel portion and the leg portion, and the hinge portion is biased to a position outside the approximate plane of symmetry. And the angle between the approximately symmetrical surface and the inclined surface is an angle in the range of 23 degrees to 33 degrees.

[0021] A snowboard boot according to a ninth aspect of the present invention is characterized in that, in the third aspect, the hinge portion is movable.

A snowboard boot according to a tenth aspect of the present invention is characterized in that, in the third aspect, the hinge portion is movable in a horizontal direction between a plurality of positions.

[0023] A snowboard boot according to an eleventh aspect of the present invention is the snowboard boot according to the third aspect, wherein the heel portion and the leg portion are composed of three layers of an inner and outer layer and an intermediate layer which are superposed in the front-rear direction, and the hinge portion is arranged in the intermediate layer. It is characterized by

[0024] A snowboard boot according to a twelfth aspect of the present invention is the snowboard boot according to the third aspect of the invention, wherein the heel portion and the leg portions are formed of inner and outer layers which are superposed in the front-rear direction, and the hinge portion is arranged outside the outer layer. I am trying. Still another aspect of the present invention can be expressed as follows.

In the snowboard boot according to the first or second aspect of the invention, the rotation axis center line on the left foot side and the rotation axis center line on the right foot side intersect with each other while being inclined in a V shape.

In still another aspect of the present invention, the angle between the approximately symmetrical surface and the inclined surface is an angle between the approximately symmetrical surface and an orthogonal line orthogonal to the long axis of the snowboard on which the snowboard boot is mounted. Not less than.

[0027] In still another aspect of the present invention according to any one of the above aspects, the angle between the approximately symmetrical surface and the inclined surface is 2 with respect to a foot side located forward in a traveling direction.
The angle is in the range of 3 to 33 degrees, and the angle between the plane of approximate symmetry and the orthogonal line is 20 to 3 with respect to the foot side.
The angle is in the range of 0 degrees.

[0028] In still another aspect of the present invention, in any one of the above-mentioned inventions, an angle between the approximately symmetrical surface and the inclined surface is such that, with respect to both foot sides, the approximately symmetrical surface and a length of a snowboard to which the snowboard boot is attached. Not less than the angle between the orthogonal lines orthogonal to the axis.

In still another aspect of the present invention, in any one of the above-mentioned inventions, a heel portion included in a heel portion and a leg portion located above the heel portion are provided, and the heel portion and the leg portion are the heel portions. Is rotatably coupled about a rotation axis center line included in an inclined surface in which the front side is inclined toward the inner side with respect to a substantially symmetry plane that makes the left and right parts of the part substantially symmetrical. The crossing portion that intersects the heel portion and the leg portion is formed as a hinge portion, and the hinge portion is arranged at a biased position that is biased outward from the approximately symmetrical surface, and the approximately symmetrical surface and the inclined surface. The angle between them is not smaller than the angle between the approximate plane of symmetry and the orthogonal line orthogonal to the long axis of the snowboard to which the snowboard boot is attached, with respect to the foot side located forward in the traveling direction.

[0030] In still another aspect of the present invention according to any one of the above aspects, the angle between the approximately symmetrical surface and the inclined surface is an angle in the range of 23 degrees to 33 degrees with respect to the foot side. The angle between the plane of approximate symmetry and the orthogonal line is in the range of 20 to 30 degrees with respect to the foot side.

[0031] In still another aspect of the present invention, in any one of the above-mentioned inventions, the angle between the approximately symmetrical surface and the inclined surface, which is an angle with respect to the foot side located forward in the traveling direction, is the approximately symmetrical surface. And the angle between the inclined surface and the inclined surface, which is larger than the angle relating to the foot side located rearward in the traveling direction.

In each of the above inventions, the overlapping portions at the offset positions may be slid on each other by spherical contact. Further, the arc appearing on the cross section of the sliding surface may be a general arc, and the curved surface formed by the set of arcs is an ellipsoidal surface,
It can be formed in a spherical shape. When the upper part is also rocked in the front-rear direction, it is formed into a curved surface in consideration of the rockability in the front-rear direction.

According to the snowboard boot of the present invention, the substantially symmetrical structure swings about the axis intersecting the plane of symmetry. Internal stress that is asymmetric with respect to the swinging force of the foot that causes such swinging occurs. Such internal stress acts on the foot as a resistance force larger than the swing in the plane orthogonal to the plane of symmetry.

Such a resistance force, which is not a local frictional resistance generated by the structure of the entire snowboard boot, which is a multilayer cylindrical structure composed of three layers of inner and outer layers, is It is extremely stable. This stability makes the rocking smooth.

The tilting motion of the ankle is not a motion on the vertical plane including the center line of the ankle axis. Movement on a vertical plane or a plane including the axis of the ankle axis is difficult due to the three-dimensional arch structure of the ankle. The three-dimensional arch structure of the ankle is a restricted three-dimensional rotation support structure that tilts in the left-right direction while tilting forward, and that it is difficult to tilt in the left-right direction unless the forward tilt angle changes,
It is not an unconstrained universal structure.

The lateral tilt motion of the ankle is facilitated by a combination with the anterior-posterior tilt motion. Furthermore, swinging on a swinging surface inclined with respect to the vertical plane including the axis of the ankle shaft is easier than the swinging motion on the vertical plane including the axis of the ankle shaft by the three-dimensional structure. is there. The tilted structure according to the invention adheres to such a three-dimensional arch structure of the ankle. Therefore, the leaning motion of the foot is facilitated and the loss of propulsion force is small.

When the snowboard boots are mounted obliquely with respect to the long axis direction of the snowboard, that is, the traveling direction, the swing of the foot in the oblique direction is inclined with respect to the orthogonal line orthogonal to the traveling direction. The propulsive force is applied to the snowboard boots attached to the snowboard in the direction of travel. Such a propulsive force reduces or reduces the rotational force as a component force for rotating the snowboard, so that the loss of the propulsive force exerted by the foot on the snowboard is further reduced and the propulsion efficiency is high. This high propulsion efficiency is advantageous in piping competitions.

The snowboard boot according to the present invention can be used for a step-in type snowboard. Cleats are attached to the snowboard boots. An engagement mechanism with which the cleat engages in a step-down manner is provided on the snowboard. According to this engagement mechanism, the disc to which the snowboard boot is attached is fixed at an arbitrary rotational position. When the angle relationship between the snowboard boot and the snowboard is changed, the axis of rotation will rotate in the same body as the snowboard boot.

[0039]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) Next, a first embodiment of the snowboard boot of the present invention will be described. Generally, shoes have a hard core bottom portion, a hard heel portion, and a hard fingertip portion. Such a hard core material is covered with a soft material inside of a shoe sole and other skin materials. In snowboard boots, a hard sole core is used.

In order to strengthen the heel portion, a heel hard portion called a heel cup or the like is attached to the inside or outside of the skin material. The heel hard portion included in the heel portion is fixed to the heel skin material or the core bottom by means such as sewing or adhesion. A hard material such as nylon 66 is used for the heel hard portion.

FIG. 1 shows a heel rigid portion 1 which is a heel cup mounted inside the outer skin of a snowboard boot. The heel hard portion 1 is a heel portion composed of the heel portion 2. The heel portion 2 is provided with curved inner and outer surfaces having a convex curvature on the outer side. The heel hard part 1 has a core bottom (not shown).
The bottom portion 3 that is in close contact with is continuously formed. Generally, shoes can be arranged so as to be mirror-symmetrical to the left and right, but the left and right shoes are not formed in symmetrical shapes.

However, the heels are left and right and are substantially symmetrical to each other. When the shoe is placed on a horizontal surface, the heel is generally symmetrical with respect to a vertical plane that includes a line in the anterior-posterior direction. Such a substantially symmetric surface is hereinafter referred to as a substantially symmetric surface in this specification or in the description of the claims.

In FIG. 1, the right side of the approximate plane of symmetry S is the outside and the left side of the approximate plane of symmetry S is the inside. That is, the illustrated rigid heel portion 1 is for the right foot. An upper end edge on the rear side of the heel portion 2 is formed in a curved shape symmetrical with respect to the substantially symmetrical surface S. This curve is composed of an outer upward projecting shape line 4 and an inner upward projecting shape line 5 and a central concave line 10 that is formed in a concave shape facing downward in the center.

The heel portion 2 is formed with an outer protruding portion 6 and an inner protruding portion 7, which are shaped by the outer upward protruding shape line 4 and the inner upward protruding shape line 5. The outer upward projecting shape line 4 and the inner upward projecting shape line 5 are upwardly convex.

At the upper position of the heel hard portion 1, a leg hard portion 11 included in the leg is provided. The hard material used for the leg hard portion 11 is softer than the material of the heel hard portion 1. The leg hard portion 11 is a portion that supports the rear surface of the ankle. When the heel hard portion 1 is expressed as the lower portion of the hard portion, the leg hard portion 11 is expressed as the upper portion of the hard portion.

The lower end edge on the lower side of the leg hard portion 11 is formed in a curved shape symmetrical with respect to the substantially symmetrical surface S. This curve is composed of an outer downward projecting shape line 12 and an inner downward projecting shape line 13 and a central side convex line 20 which is convexly formed toward the upper center.

The outer downward projecting shape line 12 and the inner downward projecting shape line 13 are downwardly convex. The leg hard portion 11 is formed with an outer protruding portion 14 and an inner protruding portion 15, which are shaped by the outer downward protruding shape line 12 and the inner downward protruding shape line 13. The outer protrusion 6 and the outer protrusion 14 are overlapped in the front-rear direction.

The inner protruding portion 7 and the inner protruding portion 15 are also overlapped in the front-rear direction. Which is to be the front is a matter of design, but in the following description, it is assumed that the outer protruding portion 6 and the inner protruding portion 7 are arranged in front of the outer protruding portion 14 and the inner protruding portion 15, respectively.

The outer protrusion 6 and the outer protrusion 14 are biased to the right with respect to the plane of symmetry S, and the inner protrusion 7 and the inner protrusion 15 are biased to the left. Next, the approximated plane of symmetry S is passed through the eccentric center point O, which is the eccentric position, which is the approximate center position between the eccentric outer protrusion 6 and the outer protrusion 14.
A straight line intersecting with is defined as a rotation axis L. The rotation axis L intersects with the bottom surface of the shoe. A portion where the rotation axis L intersects the heel hard portion 1 and the leg hard portion 11 is formed as a hinge portion.

The rotational axis L is inclined downward toward the front. It is a matter of design whether the rotational axis L is inclined forward or downward, but if it is inclined downward, the foot in the forward leaning posture and the snowboard boot can be fixed well.

FIG. 2 shows a polymerized structure in which the outer protrusion 6 and the outer protrusion 14 are superposed. The outer protrusion 14 is
The eccentric position is fixed to the outer protruding portion 6 by the position fixing rivet 17. The position fixing rivet 17
A pivot or rotation shaft 18 is provided.

The axis line of the rotation shaft 18 coincides with the rotation axis line L. A surface where the outer protruding portion 6 and the outer protruding portion 14 are superposed and slide with each other is formed as a spherical surface or a substantially spherical surface 19. The axial tightening force of the position fixing rivet 17 is designed to be small so that the spherical frictional force between the outer protruding portion 6 and the outer protruding portion 14 becomes small. The outer protrusion 6 and the outer protrusion 14 are relatively rotatably coupled to each other.

FIG. 2 shows a superposed structure of the inner protruding portion 7 and the inner protruding portion 15. Inner protrusion 7 and inner protrusion 1
The inner eccentric position which is the overlapping position of 5 is set to a position symmetrical to the right eccentric position which is the overlapping position of the outer protruding portion 6 and the outer protruding portion 14 with respect to the substantially symmetrical surface S. Inner protrusion 7
The overlapping surface 22 where the inner protrusion 15 overlaps with each other is an arc or a set of arc-shaped curves. The radius of the arc is indicated by R in FIG.

The cross section of the overlapping surface is formed in an arc or arc shape. The arc or the arc-shaped shape line is hereinafter referred to as a general arc 23. An approximately circular arc 23 is shown in FIG. FIG. 3 is a sectional view taken along a vertical plane including the orthogonal line 24 shown in FIG. The intersection between the vertical plane and the axis L of the rotation axis is represented by P.

The general arc 23 is an arc-shaped curve centered on the point P. The inner projecting portion 7 is formed as a portion of the heel hard portion 1 that is the thick portion 26. The outer side surface of the thick portion 26 and the inner side surface of the inner protruding portion 15 are formed into a surface as a set of generally circular arcs 23.

In FIG. 2, the direction of travel of the snowboard is arrow 31.
Indicated by A case where a propulsive force is applied to the snowboard on the left side in FIG. 2 will be described. When the right ankle is tilted in the direction of movement of the sole or snowboard (left in the figure), for example, the leg rigid portion 11 that curves along the rear surface of the ankle is inwardly inside the body of the ankle (the direction of travel, toward the left foot). Direction). The leg hard portion 11 receives this swinging force or thrust and rotates counterclockwise about the point O which is the center of rotation and tilts. In this case, the inner protruding portion 7 and the inner protruding portion 15 are in contact with each other at the arc 23 and slide smoothly.

Since such tilting occurs on a surface that intersects with the approximate plane of symmetry S of the snowboard boot, a resistance force is generated in the snowboard boot structured substantially symmetrically with respect to the plane of approximate symmetry S. The resistance force generated in the structure composed of the heel hard portion 1 and the leg hard portion 11 that are in contact with each other on the curved surface limits the swing force of the leg hard portion 11 with respect to the heel hard portion 1, so that the swing Never overdo it.

Such resistance force, which does not depend on the sliding frictional force between the outer protruding portion 6 and the outer protruding portion 14 or the sliding frictional force between the inner protruding portion 7 and the inner protruding portion 15, is a solid of the snowboard boot. Since it is determined by the structure, it is almost constant and stable. The concave portion formed between the outer protruding portion 6 and the inner protruding portion 7 facilitates the deformation of the hard heel portion 1. The concave portion formed between the outer protruding portion 14 and the inner protruding portion 15 facilitates the deformation of the leg hard portion 11. The propulsive force of the snowboard will be described later in detail.

(Second Embodiment) FIGS. 4, 5 and 6 show a second embodiment of the snowboard boot according to the present invention. 4, 5 and 6 are the same as FIGS. 1, 2 and 3 except the following matters. In the first embodiment, no means for connecting the inner protruding portion 7 and the inner protruding portion 15 in the front-rear direction is provided. In the second embodiment, the inner protruding portion 7 and the inner protruding portion 1
In that a means for connecting 5 and 5 in the front-back direction is provided,
Different from the first embodiment.

As shown in FIG. 4, an elongated hole 41 is formed in the inner protruding portion 15. A round hole 4 is formed in the inner protruding portion 7.
2 is open. Rivet 43 is passed through the long hole 41 and the round hole 42. By crushing both ends of the rivet 43, the inner protruding portion 7 and the inner protruding portion 15 are loosely joined in the front-rear direction. The long hole 41 is centered on the rotation axis L
It is formed along two arcs.

The angle formed by the upper and lower ends of the elongated hole 41 with respect to the rotation axis L is θ. This angle θ is shown in FIG.
The upper and lower ends of 1 are approximately shown as an angle formed with respect to the point O. The axis of the rivet 43 is on the vertical plane including the orthogonal line 24 and on the line passing through the point P. When the leg rigid portion 11 swings with respect to the heel rigid portion 1, the rivet 43 generally moves up and down along the elongated hole 41.

(Embodiment 3) FIGS. 7, 8 and 9 are based on the point that metal is used instead of resin as the material of the heel hard portion of the heel portion and the leg hard portion of the legs of Embodiments 1 and 2. There is a technical improvement part. FIG. 7 shows a heel metal part 51 that constitutes the rigid heel part 1. 8 and 19 show the hard part 1 of the heel.
Metal parts 51 and leg metal parts 56 of the leg hard part 11
It shows the assembled state of assembled.

The metal part 56 is on the rear side of the metal part 51, but the front-back relationship between these two parts is a matter of design.
The metal parts 5 and 56 are for the left foot. The metal component 51 is formed of a heel portion 52 and a band-shaped curved portion 53. The heel portion 52 rises from the central portion of the curved portion 53 and is inclined rearward.

The heel portion 52 has a spherical surface 54 on the outer side, that is, the rear surface. A hole 55 for a pivot penetrates through the heel portion 52.
The metal component 56 is located above the heel portion 52 and is rotatably coupled to the heel portion 52 by a rotation shaft (not shown). The part where the metal part 56 contacts the heel part 52 is formed into a spherical surface that matches the spherical surface 54.

In FIG. 7, the snowboard traveling direction is arrow A.
Indicated by The rotation axis center line L of the metal component 56 is generally orthogonal to the traveling direction and is slightly downward. That is, the rotation axis L intersects the plane including the shoe bottom. The metal component 51 has bolt holes 57 at a plurality of locations.

The metal part 51 is firmly fixed to the elastic outer skin of the snowboard boot with bolts (not shown) passing through the bolt holes 57. The metal part 56 also has a plurality of bolt holes 58 arranged in the vertical direction. Metal parts 5
6 is a bolt hole 5 in the elastic outer skin of the snowboard boots
It is firmly fixed by a bolt (not shown) passing through 8.

(Swing tilt structure common to the first, second and third embodiments) The approximate plane of symmetry of each snowboard boot can be defined as follows, for example. 2 inside of both feet
If you touch the point lightly and stand upright, the approximate plane of symmetry is contact 2
It is a vertical plane that is parallel to the plane including the points and that includes the rear end point of the approximately spherical heel portion. FIG. 10 shows a left-side generally symmetrical plane SL and a right-side generally symmetrical plane SR of the left and right feet according to the above definition.

In FIG. 10, an arrow B indicates the direction of travel. That is, the snowboard is propelled to the side of the left foot, which is generally the dominant foot. The long axis of snowboard 61 is shown at 62. The long axis 62 is
It is parallel to the traveling direction B when going straight. The dominant foot is the left foot, and the right foot contributes less to propulsion than the left foot. Snowboarding is propelled in a manner that appears to violate the law of action and reaction. When the right foot and the left foot act equally on the snowboard, the snowboard and the rider have an internal force relationship and the snowboard is not propelled. In extreme terms, the rocking / tilting structure of the right foot is less important when propelling the snowboard in one direction to the left.

The approximate plane of symmetry SL is inclined 27 degrees with respect to the front-back direction, that is, the orthogonal line 63 orthogonal to the long axis 62 of the snowboard. The approximate plane of symmetry SL is inclined in such a manner that the front side of the foot is advanced in the traveling direction rather than the rear side. This 27 degrees is
This is the angle obtained as the optimum value based on empirical rules.

Of course, the optimum angle varies depending on the progress of the snowboard, the competition event, and the individuality of each person. A pivot portion (rotation axis center line L that is the base point of the pivot position of the left rotation axis center line LL)
A hinge portion, which is a crossing portion where L intersects the heel portion and the leg portion, is deviated to the left of the approximate plane of symmetry SL. The angle between the rotation axis LL and the plane of symmetry SL is set to 30 degrees. The rotation axis center line LL is included in an inclined surface that is inclined so that the front is directed inward.

In general, the plane of symmetry SL and the axis L of the rotation axis L
The angle between the inclined surface 64, which is a vertical surface including L, is an angle in the range of 23 degrees to 33 degrees with respect to the foot side located forward in the traveling direction, and is between the substantially symmetrical surface and the orthogonal line 63. The angle is in the range of 20 to 30 degrees with respect to the left foot side.

The angle between the plane of approximate symmetry SL and the inclined surface 64 is not smaller than the angle between the plane of approximate symmetry and the orthogonal line 63 on both foot sides. For example, as described above, they are 30 degrees and 27 degrees. With such a relationship, the rotation axis center line LL is substantially parallel to the orthogonal line 63. In the illustrated embodiment, the angle between the rotation axis LL and the orthogonal line 63 is set to 3 degrees and is substantially parallel.

The approximate plane of symmetry SR is inclined 6 degrees with respect to the orthogonal line 63 that is orthogonal to the longitudinal direction, that is, the long axis 62 of the snowboard. The approximate plane of symmetry SR is inclined such that the front of the foot is advanced in the traveling direction rather than the rear. This 6 degrees is an angle obtained as an optimum value based on empirical rules. Therefore, the optimum angle differs depending on the progress of the snowboard, the sporting event, and the individuality of each person.

The pivot point, which is the base point of the pivot position of the rotation axis LR on the right side, is deviated to the left side of the approximate plane of symmetry SR.
The angle between the axis of rotation LR and the plane of symmetry SR is set to 5 degrees. Generally, the plane of symmetry SR and the axis of rotation LR
The angle with the inclined surface 65 that is a vertical surface is a range of 0 to 8 degrees with respect to the foot side located rearward with respect to the traveling direction, and is between the substantially symmetric plane SR and the orthogonal line 63. The angle is in the range of 0 to 10 degrees with respect to the right foot side.

The angle between the substantially symmetrical surface SR and the inclined surface 65 is not smaller than the angle between the substantially symmetrical surface SR and the orthogonal line 63. For example, as described above, they are 6 degrees and 5 degrees.
With such a relationship, the rotation axis center line LR is substantially parallel to the orthogonal line 63. In the illustrated embodiment, the angle between the rotation axis LR and the orthogonal line 63 is set to 1 degree and is substantially parallel. The rotation axis center line LL and the rotation axis center line LR intersect in a V shape. The angle between them is in this case 4 degrees.

By moving the weight forward and moving the center of gravity of the body forward, as shown in FIG. 11, a main point of action is generated in the left foot, which is the dominant foot, and a propulsive force is applied to the snowboard. In this case, as shown in FIG. 12, the left foot leans forward more than the right foot. It is difficult to tilt the foot to the left without tilting the foot forward.

Due to the three-dimensional arch structure, the foot has an approximate plane of symmetry S.
It is difficult to rotate with L as the axis of rotation. The foot twists while tilting forward and rotates on a plane inclined with respect to a plane orthogonal to the plane of approximate symmetry SL. The angle of this slope is
It is about 30 degrees at the fully depressed position.

The foot is in a rotation position rotated about the axis of rotation LL on the inclined surface 64 inclined by about 30 degrees with respect to the plane of symmetry SL. The rotating structure of the leg rigid portion 11 is provided faithfully to such a restraining rotating mechanism of the foot. Therefore, the foot can swing with the snowboard boot without difficulty.

The swinging direction of the foot is generally in a vertical plane including the long axis 62 of the snowboard. The shift of the center of gravity due to the swinging of the foot in this way makes the snowboard efficiently travel in the traveling direction B
Generate propulsive force in the direction of. According to the conventional rocking mechanism, if the force of the foot on the snowboard is F, the thrust is co
s (30) · F, and in order to exert this force F, it was forced to perform a difficult refracting movement contrary to the structure of the foot.

When an arbitrary point P of the foot which is already tilted forward is rotated around the axis 101 which is oriented in the anteroposterior direction of the foot, FIG.
As shown in FIG. 6, the position of the point which is lowered from the point P on the horizontal plane in the right angle direction shifts from the point Q1 to the point Q2. Point Q1 and point Q
The straight line connecting 2 and 2 is parallel to the line 102 orthogonal to the axis 101. Such rotation is difficult because of the three-dimensional arch structure of the foot.

When the foot rotates by an angle γ (not shown) with the inclined line 104, which is inclined inwardly with respect to the axial center line 101, as the axial center line, the point P shifts from the point Q1 to the point Q3. The straight line connecting the points Q1 and Q3 is parallel to the line 105 orthogonal to the inclined line 104 which is the axial center line in this case. Such rotation is easy due to the three-dimensional arch structure of the foot. The relationship between the horizontal rotation angle γ and the forward tilt angle θ is
At a reasonable rotation angle position, it can be easily confirmed that the relationship of γ = F (θ) is satisfied by performing a refracting motion of the foot. This kind of exercise is performed on snowboards.

In the piping competition, the traveling directions are both left and right. In this case, the plane of approximate symmetry is designed to be substantially orthogonal to the long axis direction of the snowboard. In this case, the inclined surfaces 64 and 65 are inclined with respect to the substantially symmetrical surface at an angle smaller than 30 degrees. Even if there is a loss in which the component force in the traveling direction becomes small, there is more benefit in reducing the loss by not facilitating the tilting movement of the foot. (Other Embodiments) In the snowboard boot according to the present invention, its hinge portion can be movably provided.
The hinge portion need not move continuously. Insertion holes or the like for attaching the hinge portion can be provided at several positions in advance. The tilt angle of the rotation axis may be changed when the position of the hinge portion is moved.

The snowboard boot can be composed of three layers, an inner layer and an outer layer. In this three-layer structure, the cylindrical structure of the legs and the heel is a multilayer cylindrical structure. Such a multilayer cylindrical structure provides the snowboard boot with a reinforced structure. The hinge portion is arranged on the intermediate layer of the three layers. Alternatively, the hinge portion may be arranged by being exposed to the outside of the two-layer or three-layer structure.

[0084]

According to the snowboard boot of the present invention, the swinging force is stable and the steering is easy. The driving force of the foot acts on the snowboard and is transmitted efficiently.
The movement is diversified.

[Brief description of drawings]

FIG. 1 is a perspective view of a snowboard boot according to a first embodiment of the present invention.

FIG. 2 is a plan sectional view of FIG.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a perspective view showing a second embodiment of the snowboard boot of the present invention.

5 is a plan sectional view of FIG.

FIG. 6 is a sectional view taken along line VI-VI of FIG. 5;

FIG. 7 is a plan view showing a third embodiment of the snowboard boot of the present invention.

FIG. 8 is a left side view of FIG. 7.

9 is a front view of FIG. 7. FIG.

FIG. 10 is a plan view showing the positional relationship between the snowboard boots and the snowboard of the present invention.

FIG. 11 is an oblique projection view for analyzing the reflex movement of the foot with respect to both feet.

FIG. 12 is an oblique projection view for analyzing the refraction movement of the foot with respect to the left foot.

[Explanation of symbols]

 1 ... Heel rigid part 2 ... Heel part 6 ... Outer protrusion part 7 ... Inner protrusion part 11 ... Leg part rigid part 12 ... Outer downward protruding shape line 14 ... Outer protrusion part 15 ... Inner protrusion part 18 ... Rotating shaft 62 ... Long axis 63 ... Orthogonal line 64 ... Inclined surface L, LL, LR ... Rotation axis center line S, SL, SR ... Approximately symmetrical surface

Claims (12)

[Claims] 1. A snowboard boot comprising a heel portion included in a heel portion and a leg portion located above the heel portion, wherein the heel portion and the leg portion substantially symmetric left and right portions of the heel portion. The front surface is inclined toward the inner side with respect to the plane of approximate symmetry, and is rotatably coupled around a rotation axis that is included in the vertical direction and is inclined vertically within an angle of ± 45 degrees with respect to the horizontal direction. Snowboard boots that are characterized by. 2. A snowboard boot comprising a heel hard portion included in a heel portion and a leg hard portion located above the heel hard portion, wherein the heel hard portion and the leg hard portion are of the heel portion. The rotation axis of the rotation axis that is included in an inclined surface whose front is inclined toward the inner side with respect to a substantially symmetrical surface that makes the left and right parts approximately symmetrical and inclines vertically at an angle within ± 45 degrees with respect to the horizontal direction. Snowboard boots characterized by being rotatably coupled around. 3. The hinge portion according to claim 1 or 2, wherein a hinge portion is formed at an intersecting portion where the axis of rotation intersects the heel portion and the leg portion, and the hinge portion is deviated from the substantially symmetrical plane. Snowboard boots characterized in that they are arranged in a biased position. 4. The snowboard boot according to claim 3, wherein the eccentric position is outward of the approximate plane of symmetry. 5. The snowboard boot according to claim 1, wherein the axis of rotation intersects a surface including a shoe bottom. 6. The snowboard boot according to claim 1, wherein the angle between the approximately symmetrical surface and the inclined surface is an angle in the range of 23 degrees to 33 degrees. 7. The snowboard boot according to claim 3, wherein the hinge portion is made of metal. 8. A snowboard boot comprising a heel portion included in a heel portion and a leg portion located above the heel portion, wherein the heel portion and the leg portion substantially symmetrically form left and right portions of the heel portion. The front surface is inclined toward the inner side with respect to the plane of approximate symmetry, and is rotatably coupled around a rotation axis that is included in the vertical direction and is inclined vertically within an angle of ± 45 degrees with respect to the horizontal direction. A hinge portion is formed at an intersecting portion where the rotation axis intersects the heel portion and the leg portion, and the hinge portion is arranged at a biased position offset to the outside of the approximate plane of symmetry, The angle between the plane of symmetry and the inclined surface is 23 degrees to 3 degrees.
Snowboard boots characterized by angles in the range of 3 degrees. 9. The snowboard boot according to claim 3, wherein the hinge portion is movable. 10. The snowboard boot according to claim 3, wherein the hinge portion is horizontally movable between a plurality of positions. 11. The heel according to claim 3, wherein the heel portion and the leg portion are composed of three layers of inner and outer layers and an intermediate layer which are overlapped in the front-rear direction, and the hinge portion is arranged in the intermediate layer. Snowboard boots. 12. The snowboard boot according to claim 3, wherein the heel portion and the leg portion are formed of inner and outer layers that overlap in the front-rear direction, and the hinge portion is arranged outside the outer layer.