Putter mat and method for drawing putter track curve

Abstract

To provide a putter mat capable of practicing putting that increases a putting success rate, and a method for drawing a putter track curve that contributes to the putter practice which increases the putting success rate.SOLUTION: A putter mat A to be one embodiment of a putter mat applying the current invention includes a body mat 1 and an arrangement sheet 2. The body mat 1 displays a ball mounting part 10, a first target line 11, a first positioning part 12, and a distance reference line 13. The body mat 1 also displays a distance display line 14, a distance numerical value 15, a first permission marker 16, a second permission marker 17, and a virtual ball part 18. The arrangement sheet 2 displays a second target line 20, a second positioning part 21, a plurality of putter track curves 22, and a contact point vertical line 23. Each putter track curve 22 among the plurality of the putter track curves is a curve for confirming a rotation track of a putter head specific to a player. Each putter track curve 22 is drawn on the arrangement sheet 2 as the curve in partially circular arc shapes that differ in radius of rotation.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a putting mat and a method for drawing a putt trajectory curve. Specifically, it relates to a putting mat that enables practice of putts to improve the success rate of putting and a method for drawing a putt trajectory curve that contributes to practice of putts to improve the success rate of putting.

Background Art

[0002] In golf putting, the operation of rolling the ball on the green using a putter and putting it into the cup is performed. The skill of putting greatly affects the score. Therefore, various improvements have been made to golf putters and practice tools for the purpose of improving the success rate of putting.

[0003] For example, as a putting practice tool, a putting mat that can be easily installed and removed is widely used. This putting mat generally has a structure in which a linear line and a cup are provided on a strip-shaped mat having a surface imitating grass.

[0004] In recent years, in order to prevent monotonous practice, not only is putting repeated, but also putting mats and the like that can measure and total the ball position and enable analysis of putting have been proposed (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, conventional putter mats, including the putter mat described in Patent Document 1, are not structured in a way that allows players to be aware of the trajectory of the pendulum motion that is inclined with respect to the vertical direction, with the player as the center of rotation, which is the trajectory of the stroke of the putter head.

[0007] Here, in putting, it is considered that three conditions are required to roll the ball straight into the target cup. The first condition is that the putter face is perpendicular to the straight line connecting the ball and the cup.

[0008] The second condition is that at the time of impact, the sweet area of the putter face coincides with the center of the ball. The sweet area means an area where the initial velocity of the ball can be kept at a constant speed at the time of impact.

[0009] Furthermore, the third condition is that in a plan view, the trajectory of the stroke of the putter head forms equal incident and exit angles with respect to the straight line connecting the ball and the cup.

[0010] And when practicing a putting motion that satisfies these three conditions, regarding the trajectory of the stroke of the putter head, a trajectory of pulling the putter head straight and pushing it straight out has been proposed.

[0011] However, except for special putting motions, in many players, the trajectory of the stroke of the putter head is a trajectory of a pendulum motion that is inclined with respect to the vertical direction, with the player as the center of rotation. That is, the trajectory of the stroke of the putter head takes a circular motion trajectory with a constant radius of rotation around the player as the central axis in a plan view.

[0012] The trajectory of the pendulum motion inclined with respect to the vertical direction with this player as the center of rotation is a trajectory in which, when addressing the putting, the shaft and the putter head pass through a line connecting either the cervical vertebra or thoracic vertebra of the player and the bottom surface of the putter head as the axis of rotation, and with either the cervical vertebra or thoracic vertebra of the player as the center of rotation during the rotational movement.

[0013] This rotational movement with either the cervical vertebra or thoracic vertebra of the player as the center of rotation, in the direction connecting the ball and the cup, that is, when viewed from the side of the player's body, a lie angle is formed between the shaft and the ground at address, and the line connecting the center of rotation and the bottom surface of the putter head becomes an oblique line inclined with respect to the vertical direction.

[0014] And from this state, with either the cervical vertebra or thoracic vertebra of the player as the center of rotation, the putter head is pulled against the ball (backward stroke), the putter head is moved toward the ball, the ball is impacted with the putter face, and then a follow-through (forward stroke) operation of further pushing out the putter head is performed.

[0015] Since these series of putting operations are rotational movements with either the cervical vertebra or thoracic vertebra of the player as the center of rotation, the trajectories of the shaft and the putter head become the trajectory of the pendulum motion by the inclined axis of rotation. In the above, this trajectory was referred to as the trajectory of the pendulum motion inclined with respect to the vertical direction with the player as the center of rotation.

[0016] Also, when changing the perspective, the trajectory of the putter head in the putting motion becomes a trajectory that draws a partial arc in contact with a straight line parallel to the straight line connecting the positions of both shoulders at address in a plan view of the player.

[0017] However, originally, for the trajectory of the putter head that takes a trajectory drawing a partial arc in plan view, a contradiction occurs in order to obtain a straight linear movement in the backward stroke before impact or the forward stroke after impact.

[0018] As a result, it becomes difficult to implement the three conditions described above for rolling the ball straight into the target cup, particularly the third condition that in plan view, the trajectory of the putter head stroke forms equal incident and exit angles with the straight line connecting the ball and the cup, which has become a factor inhibiting the success rate of putting.

[0019] And most of the conventional putting mats are provided with straight lines in order to make players conscious of a trajectory of pulling the putter head straight and pushing it straight out, and it was impossible to practice being conscious of the trajectory of the putter head that takes a trajectory drawing a partial arc in plan view.

[0020] Also, in a rotational movement with the cervical vertebra or thoracic vertebra of the player as the rotation center, the rotation radius of the trajectory of the putter head that takes a trajectory drawing a partial arc in plan view varies depending on the player's physique, address posture, degree of elbow bending, etc.

[0021] Therefore, if the player can grasp the rotation radius in their own putting motion, it becomes possible to perform a putting motion with a higher success rate.

[0022] The present invention was devised in view of the above points, and an object thereof is to provide a putting mat capable of practicing a putter to increase the success rate of putting. Also, an object of the present invention is to provide a method of drawing a putter trajectory curve that contributes to practicing a putter to increase the success rate of putting.

Means for Solving the Problems

[0023] To achieve the above object, the putter mat of the present invention includes a strip-shaped main body mat, a first target line which is a straight line displayed on the main body mat along the longitudinal direction of the main body mat, a circular figure displayed on the main body mat, the center of which is arranged at a position through which the first target line passes, a ball placement portion indicating a position where a ball is placed, a first alignment portion provided on the first target line of the main body mat and adjacent to the ball placement portion, a strip-shaped placement sheet that can be arranged on top of the main body mat, a second target line which is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, a second alignment portion provided on the second target line of the placement sheet, which serves as a reference for aligning with the position of the first alignment portion when the placement sheet is arranged on top of the main body mat, and which serves as a rotation center when the orientation of the placement sheet is tilted with respect to the orientation of the main body mat, and putter track curves which are a plurality of partial arc-shaped curves with different radii displayed on the placement sheet, and each curve is tangent to the second target line at the position of the second alignment portion.

[0024] Here, by means of the strip-shaped main body mat, the first target line which is a straight line displayed on the main body mat along the longitudinal direction of the main body mat, and the circular figure displayed on the main body mat, the center of which is arranged at a position through which the first target line passes and which indicates a position where a ball is placed, a ball can be placed on the ball placement portion from above the main body mat and the placement sheet, and the first target line displayed on the main body mat can be regarded as a straight line connecting the ball and the cup, thereby practicing the putting motion. Also, even if a ball is not placed on the ball placement portion, assuming that a ball is placed, the first target line can be regarded as a straight line connecting the ball and the cup, thereby practicing the putting motion.

[0025] Note that the point that the center of the ball placement portion is arranged at a position through which the first target line passes as mentioned here includes not only the aspect where the first target line is displayed inside the circular figure, but also the case where the first target line is not displayed inside the circular figure of the ball placement portion and the first target line is displayed in a positional relationship passing through the center of the circular figure.

[0026] Further, the first alignment portion is provided on the first target line of the main mat and adjacent to the ball placement portion, and the second alignment portion is provided on the second target line of the placement sheet. When the placement sheet is placed on the main mat with overlap, by serving as a reference for aligning with the position of the first alignment portion, when the placement sheet is placed on the main mat with overlap, alignment can be performed with reference to the first alignment portion and the second alignment portion. Thereby, it becomes possible to align the position of the placement sheet in the longitudinal direction of the main mat.

[0027] Also, the placement sheet has a second target line that is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, a second alignment portion that is provided on the second target line of the placement sheet and serves as a reference for aligning with the position of the first alignment portion when the placement sheet is placed on the main mat with overlap, and a plurality of curved lines with different radii in a partial arc shape displayed on the placement sheet, and each curved line has a putt trajectory curve that is tangent to the second target line at the position of the second alignment portion. By this, it becomes possible to confirm the trajectory of the rotational movement of the putter head with the player as the center of rotation. That is, by taking an address stance with the second target line regarded as a straight line parallel to the straight line connecting the positions of both shoulders during the putting address in a plan view of the player and performing a putting operation, it is possible to grasp the positional relationship between the actual stroke trajectory of the putter head generated by the operation and the putt trajectory curves that are a plurality of partial arc-shaped curves. And, by confirming which putt trajectory curve the actual stroke trajectory of the putter head overlaps with or is close to, it is possible to know the rotational trajectory (hereinafter referred to as the "rotational trajectory of the player-specific putter head") in the stroke trajectory of the player-specific putter head in a plan view, and the approximate rotational radius of the rotational trajectory. By confirming the rotational trajectory of the player-specific putter head of himself / herself, the player can perform repeated practice of the putting operation while being conscious of the rotational movement of the putter head with the player as the center of rotation.

[0028] The stroke trajectory of the putter head mentioned here means the trajectory that the shaft and the putter head pass through during a rotational movement with a line connecting either the cervical vertebra or thoracic vertebra of the player and the bottom surface of the putter head as the rotation axis and either the cervical vertebra or thoracic vertebra of the player as the center of rotation when addressing the putting.

[0029] In addition, the placement sheet is formed in a strip shape that can be placed on top of the main body mat. When the placement sheet is placed on top of the main body mat, it serves as a reference for aligning the position of the first alignment portion, and is the second alignment portion that becomes the center of rotation when the orientation of the placement sheet is tilted with respect to the orientation of the main body mat. The placement sheet has a plurality of curved lines with different partial arc-shaped radii displayed on it, and each curved line is in contact with the second target line at the position of the second alignment portion. By having the putter trajectory curve, when the placement sheet is placed on top of the main body mat by combining the positions of the first alignment portion and the second alignment portion, it becomes possible to tilt the orientation of the placement sheet with respect to the orientation of the main body mat. Also, thereby, in the putting motion, for players who have a habit of impacting the ball with the putter face in an open or closed orientation, it is possible to have them practice rolling the ball towards the cup while grasping the rotation trajectory of the putter head specific to the player.

[0030] That is, when the distance from the ball to the cup is about 1 m and multiple putting operations are performed, there is a tendency for the ball not to enter the cup and to be divided into those with a higher frequency of the ball deviating to the right side of the cup and those with a higher frequency of the ball deviating to the left side of the cup. Here, for those with a higher frequency of the ball deviating to the right side of the cup, as a major factor, when impacting the ball, in a plan view, the orientation of the clubface is not perpendicular to the straight line connecting the cup and the ball (square), and the toe side of the clubhead is inclined in a direction away from the cup compared to the heel side, that is, in a so-called open direction where the clubface is open. When impacting the ball with the clubface in an open direction, the ball pops out based on the orientation of the clubface, and the rolling ball is likely to deviate to the right side of the cup. Conversely, for those with a higher frequency of the ball deviating to the left side of the cup, as a major factor, when impacting the ball, in a plan view, the orientation of the clubface is such that the toe side of the clubhead is inclined in a direction approaching the cup compared to the heel side, that is, in a so-called closed direction where the clubface is closed. When impacting the ball with the clubface in a closed direction, the ball pops out based on the orientation of the clubface, and the rolling ball is likely to deviate to the left side of the cup. And even for those who tend to have the clubface inclined in an open or closed direction during impact like this, even if the clubface is inclined at the impact timing, the stroke trajectory of the clubhead (the path that the clubhead moves before and after impact) is a circular trajectory centered on the player. Therefore, when overlapping the placement sheet on the main body mat by combining the positions of the first alignment part and the second alignment part, in accordance with the inclination habit of the clubface at the player's impact, by tilting the orientation of the placement sheet with respect to the orientation of the main body mat and arranging it, while considering the inclination habit of the clubface of the player, it becomes possible to practice the putting operation while visually being aware of the circular trajectory of the player-specific clubhead.

[0031] Specifically, for a person who has a tendency for the clubface to open (become "open") at impact, align the first alignment part and the second alignment part, and with the second alignment part as the center of rotation, tilt the entire placement sheet in the closed direction (become "closed") with respect to the first target line of the body mat, and place the placement sheet. By doing so, in a plan view, the second target line is tilted with respect to the first target line (for example, for a right-handed player, in a plan view, the cup-side end of the second target line goes down to the lower left), and the putter trajectory curve is also tilted together with the second target line. Also, at the part of the second alignment part, in a plan view, the surface perpendicular to the putter trajectory curve is in the closed direction when assumed as the direction of the clubface when hitting the ball. Then, the player can grasp and swing along a putter trajectory curve that is close to the trajectory of their own putt stroke. Also, by being aware of the putter trajectory curve, in a plan view, at the part of the second alignment part, the player will also be aware of the tilt (closed) of the surface perpendicular to the putter trajectory curve and swing. Even if there is a tendency for the clubface to open at impact, it is affected by the tilt of the surface perpendicular to the putter trajectory curve. As a result, when actually hitting the ball, the direction of the clubface approaches a direction perpendicular to the first target line, and it becomes easier to hit the ball with that face direction. And the hit ball will roll straight more easily toward the cup. In this way, taking into account the tendency for the clubface to open at impact for that person, practice can be carried out to acquire the putting motion in which the ball rolls straight toward the cup.

[0032] Specifically, for a person who has a habit of the putter face being in a closed position (closed) at impact, align the first alignment part and the second alignment part. With the second alignment part as the center of rotation, tilt the entire placement sheet in the open direction with respect to the first target line of the main mat, and place the placement sheet. By doing so, in a plan view, the second target line is tilted with respect to the first target line (for example, for a right-handed player, in a plan view, the cup-side end of the second target line rises upward to the upper left), and the putter trajectory curve also tilts together with the second target line. Also, at the part of the second alignment part, in a plan view, the surface perpendicular to the putter trajectory curve is in an open position when assumed as the orientation of the putter face when hitting the ball. Then, the player can grasp and swing along the putter trajectory curve that is close to the trajectory of their own putt stroke. Also, by being aware of the putter trajectory curve, in a plan view, at the part of the second alignment part, the player will also be aware of the tilt (open) of the surface perpendicular to the putter trajectory curve and swing. Even if there is a habit of the putter face closing at impact, it is affected by the tilt of the surface perpendicular to the putter trajectory curve. As a result, when actually hitting the ball, the orientation of the putter face will also approach a direction perpendicular to the first target line, making it easier to impact the ball with that surface orientation. And the hit ball will roll straight more easily towards the cup. In this way, taking into account the habit of the putter face closing at impact for that person, practice can be carried out to acquire the putting motion that allows the ball to roll straight towards the cup.

[0033] Also, when having a pin member that is inserted at the positions of the first alignment part and the second alignment part and allows the placement sheet to be rotatable with respect to the main mat, the tilt of the placement sheet with respect to the main mat can be adjusted with the pin member as the rotation axis. Also, the pin member can prevent the position of the placement sheet from shifting, for example, along the longitudinal direction of the main mat.

[0034] Also, when five putting orbit curves are provided, it becomes a putting orbit curve that reflects the rotational radii of the stroke orbits of different putters, and a wide range of rotational radii can be shown on the placement sheet. As a result, for example, it becomes a structure that can sufficiently cope with differences in the rotational radii of the rotational orbits of the player-specific putter heads in a plan view, which vary depending on the player's physique, posture at address, degree of elbow bending, etc.

[0035] Also, when a plurality of distance display lines indicating distances at regular intervals based on the first alignment portion are displayed on the main body mat along the first target line, when practicing the putting motion, it becomes possible to easily confirm the distance between the ball and the putter head. Thereby, it becomes even easier to grasp the orbit of one's own putter head.

[0036] Also, when the placement sheet is formed of a transparent or translucent member, when the placement sheet is overlaid on the main body mat, the first target line displayed on the main body mat becomes visible. According to this, the positional relationship between the first target line and the putting orbit curve displayed on the placement sheet becomes easy to confirm. In particular, when the orientation of the placement sheet is tilted with respect to the orientation of the main body mat, while visually observing the first target line regarded as a straight line connecting the ball and the cup, it becomes possible to practice the putting motion.

[0037] When a first allowable line, which is a straight line passing through a first alignment portion in a direction along a first target line and forms an angle of 5.61 degrees with the first target line, and a second allowable line, which is a straight line passing through the first alignment portion, is provided between the first target line and the first allowable line and forms an angle of 1.87 degrees with the first target line, are displayed, an image is created such that the tangent line at the impact of the rotation trajectory of the player-specific putter head in a plan view is within the range of the angle formed by the first target line and the first allowable line, making it easier for the impacted ball to roll within the range of the angle formed by the first target line and the second allowable line. This tangent line at the impact of the rotation trajectory of the player-specific putter head in a plan view indicates the stroke direction of the putter head at the impact (the direction in which the putter head attempts to move at the impact). Also, the first allowable line forms an angle of 5.61 degrees with the first target line, and the second allowable line forms an angle of 1.87 degrees with the first target line. This 1.87 degrees is the launch angle of the ball that can be hit from 1 m away from the cup and enter the cup, calculated from the radius of the golf cup and the radius of the golf ball. That is, 1.87 degrees or less is the maximum allowable launch angle for the ball to enter the cup, and 5.61 degrees is the maximum incident angle of the stroke trajectory of the putter head with respect to the ball that is allowed to roll the ball at that launch angle. By using this first allowable line as a reference and being aware of the tangent line at the impact of the rotation trajectory of the player-specific putter head in a plan view, the success rate of putting within 1 m from the cup can be increased. Also, since the putter can be stroked within a certain angle range of within 5.61 degrees, the psychological burden on the player can be reduced.

[0038] The body mat is a straight line passing through the first alignment portion in the direction along the first target line. When a third allowable line that is line-symmetric with the first allowable line with respect to the first target line and a fourth allowable line that is line-symmetric with the second allowable line with respect to the first target line and is a straight line passing through the first alignment portion are displayed, not only the first allowable line but also the tangent line at the impact of the rotation trajectory of the player-specific putter head in a plan view is made to have an image of being within the angular range formed by the first target line and the third allowable line, so that the impacted ball can easily roll within the angular range formed by the first target line and the fourth allowable line. That is, for example, it has a structure that can correspond to both outside-in and inside-out trajectories based on the first target line and the first alignment portion.

[0039] Also, in order to achieve the above object, the putter mat of the present invention includes a strip-shaped body mat, a first target line which is a straight line displayed on the body mat along the longitudinal direction of the body mat, a circular figure displayed on the body mat, the center of which is arranged at a position through which the first target line passes, and which indicates a position where a ball is placed, a first alignment portion provided on the first target line of the body mat and adjacent to the ball placement portion, a strip-shaped placement sheet that can be arranged on top of the body mat, a second target line which is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, a second alignment portion provided on the second target line of the placement sheet, which serves as a reference for aligning with the position of the first alignment portion when the placement sheet is arranged on top of the body mat and which becomes a rotation center when the placement sheet is arranged with its orientation inclined with respect to the orientation of the body mat, and a putter trajectory curve which is a partial arc-shaped curve displayed on the placement sheet and which is tangent to the second target line at the position of the second alignment portion.

[0040] Here, the placement sheet is formed in a strip shape that can be placed on top of the main mat. When the placement sheet is placed on top of the main mat, it serves as a reference for aligning the position of the first alignment portion and also becomes the rotation center when the orientation of the placement sheet is tilted with respect to the orientation of the main mat. The placement sheet has a partial arc-shaped curve displayed on it, and a putter orbit curve that touches the second target line at the position of the second alignment portion. By having this, when the placement sheet is placed on top of the main mat while aligning the positions of the first alignment portion and the second alignment portion, it becomes possible to tilt the orientation of the placement sheet with respect to the orientation of the main mat. Also, thereby, in the putting operation, for players who tend to impact the ball with the putter face in an opening or closing orientation, it is possible to have them practice rolling the ball towards the cup while grasping the rotation orbit of the putter head specific to the player.

[0041] Also, in order to achieve the above object, the putter mat of the present invention includes a strip-shaped main body mat, a first target line which is a straight line displayed on the main body mat along the longitudinal direction of the main body mat, a circular figure displayed on the main body mat, the center of which is arranged at a position through which the first target line passes, and a ball placement portion indicating a position where a ball is placed, a first alignment portion provided on the first target line of the main body mat and adjacent to the ball placement portion, a strip-shaped placement sheet that can be arranged on top of the main body mat, a second target line which is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, a second alignment portion provided on the second target line of the placement sheet, which serves as a reference for aligning with the position of the first alignment portion when the placement sheet is arranged on top of the main body mat, and which becomes a rotation center when the orientation of the placement sheet is inclined with respect to the orientation of the main body mat, and a plurality of partial arc-shaped curves displayed on the placement sheet, each curve being tangent to the second target line at the position of the second alignment portion, and a putter track curve which is a line simulating the track of a predetermined pendulum motion that is the stroke track of the putter head when viewed from the side direction, which is the direction in which the player connects the ball and the cup.

[0042] Here, the placement sheet is formed in a strip shape that can be placed on top of the main mat. When the placement sheet is placed on top of the main mat, it serves as a reference for aligning the position of the first alignment portion and also serves as the rotation center when the orientation of the placement sheet is tilted with respect to the orientation of the main mat. The placement sheet has a plurality of curved lines with different radii in a partial arc shape, and each curved line touches the second target line at the position of the second alignment portion. By having such a pattern orbit curve, when the placement sheet is placed on top of the main mat by combining the positions of the first alignment portion and the second alignment portion, it becomes possible to tilt the orientation of the placement sheet with respect to the orientation of the main mat. Further, thereby, in the putting operation, for a player who has a habit of impacting the ball with the putter face in an opening or closed orientation, it is possible to have the player practice rolling the ball toward the cup while grasping the rotation orbit of the player-specific putter head.

[0043] Note that the so-called predetermined pendulum motion orbit here, which is the stroke orbit of the putter head when viewed from the side direction, which is the direction connecting the ball and the cup, means the orbit through which the shaft and the putter head pass during the rotation operation with a line connecting either the cervical vertebra or the thoracic vertebra of the player and the bottom surface of the putter head as the rotation axis and either the cervical vertebra or the thoracic vertebra of the player as the rotation center during the address of putting.

[0044] Also, to achieve the above object, the method for drawing a putter trajectory curve of the present invention displays a reference point and a target line which is a straight line passing through the reference point, sets the reference point as the position where the ball is placed, and causes the player to make a putter stroke movement along the target line, and a position information acquisition step of acquiring the position information of the putter head at at least one point on the trajectory of the movement; a first curve drawing step of drawing a partial arc-shaped curve connecting the position of the position information acquired in the position information acquisition step and the reference point in a plan view; and a second curve drawing step of drawing a partial arc-shaped curve having a shape line-symmetrical to the curve drawn in the first curve drawing step with respect to an orthogonal line passing through the reference point and orthogonal to the target line in a plan view.

[0045] Here, in the position information acquisition step, by displaying a reference point and a target line which is a straight line passing through the reference point, setting the reference point as the position where the ball is placed, and causing the player to make a putter stroke movement along the target line, and acquiring the position information of the putter head at at least one point on the trajectory of the movement, it is possible to determine one position in the trajectory of the putter head in the rotational movement of the putter head unique to the player.

[0046] Also, in the first curve drawing step, by drawing a partial arc-shaped curve connecting the position of the position information acquired in the position information acquisition step and the reference point in a plan view, it is possible to draw a part of the curve of the rotational trajectory of the putter head in the rotational movement of the putter head unique to the player in a plan view.

[0047] Also, in the second curve drawing step, by drawing a partial arc-shaped curve that is line-symmetric to the curve drawn in the first curve drawing step with respect to the orthogonal line passing through the reference point and orthogonal to the target line in a plan view, a partial arc-shaped curve centered on the reference point can be drawn as the curve of the rotation trajectory of the putter head in the rotation movement of the putter head unique to the player in a plan view. This curve is a curve that reflects the rotation movement of the putter head unique to the player, and for example, by displaying the curve on the putting mat, it can be used for putting practice. Also, with a simple operation, a partial arc-shaped curve that reflects the rotation movement of the putter head unique to the player can be drawn.

Effect of the Invention

[0048] The putting mat according to the present invention enables practice of putters that can increase the success rate of putting. Also, the method for drawing the putter trajectory curve according to the present invention contributes to practice of putters that can increase the success rate of putting.

Brief Description of the Drawings

[0049]

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Mode for Carrying Out the Invention

[0050] Hereinafter, embodiments of the present invention will be described with reference to the drawings to facilitate understanding of the present invention. Note that the structure shown below is an example of the present invention, and the content of the present invention is not limited thereto.

[0051] In the following description, with reference to FIGS. 2 and 5, the upper side of the paper surface is referred to as "outer", "toe" or "outer side", "toe side", and the lower side of the paper surface is referred to as "inner", "heel" or "inner side", "heel side". Also, with reference to FIGS. 2 and 5, the left side of the paper surface is referred to as "left", "left side" or "cup side", and the right side of the paper surface is referred to as "right", "right side", or "opposite side of the cup". Further, as necessary, the direction connecting the outer and the inner is referred to as the "outer-inner direction", and the direction connecting the left and the right is referred to as the "left-right direction". Also, as necessary, the direction toward the left is referred to as the "cup direction", and the direction toward the right is referred to as the "opposite direction of the cup".

[0052] In the following description, with reference to FIG. 6, the upper side of the paper surface is referred to as "up", "upper" or "vertically upward", and the lower side of the paper surface is referred to as "down", "lower" or "vertically downward". With reference to FIG. 6, the right side of the paper surface is referred to as "outer", "toe" or "outer side", "toe side", and the left side of the paper surface is referred to as "inner", "heel" or "inner side", "heel side". Further, as necessary, the direction connecting the up and the down is referred to as the "up-down direction" or "vertical direction". Also, the "outer" and "inner" etc. based on FIGS. 2 and 5 described above have the same relationship as the "outer" and "inner" of FIG. 6.

[0053] In the following description, with reference to FIG. 6, the direction from the front to the back of the paper surface is referred to as the "cup direction", and the direction from the back to the front of the paper surface is referred to as the "opposite direction of the cup". Also, the "direction from right to left" in "left" and "right" based on FIGS. 2 and 5 has the same relationship as the "cup direction" based on FIG. 6, and the "direction from left to right" in "left" and "right" based on FIGS. 2 and 5 has the same relationship as the "opposite direction of the cup" based on FIG. 6.

[0054] Here, as shown in FIG. 1, a putter mat A which is an example of a putter mat to which the present invention is applied includes a main body mat 1 and a placement sheet 2. Note that FIG. 1 shows a state in which the main body mat 1 and the placement sheet 2 are separated.

[0055] The main mat 1 is the main body of the pattern mat A that is placed on the floor surface where the pattern mat A is used. The placement sheet 2 is a sheet body for allowing a player to confirm or visually recognize the rotation trajectory of the player-specific putter head. The rotation trajectory of the player-specific putter head will be described later.

[0056] Also, the main mat 1 is a member on which the placement sheet 2 is stacked from above and arranged in a desired orientation for practicing putting. At that time, a ball is placed on the placement sheet 2 from above at the position of the ball placement portion 10 described later to practice putting. Also, the putting motion can be confirmed without placing the ball on the ball placement portion 10. Subsequently, the detailed structure of each member will be described.

[0057] [Display of the main mat] As shown in FIG. 1, on the main mat 1, a ball placement portion 10, a first target line 11, a first alignment portion 12, and a distance reference line 13 are displayed. Also, on the main mat 1, a distance display line 14, a distance numerical value 15, a first allowable marker 16, a second allowable marker 17, and a virtual ball portion 18 are displayed.

[0058] Here, the ball placement portion 10 is a reference display indicating the position where the ball is placed from above the main mat 1 and the placement sheet 2. The ball placement portion 10 has a circular figure with the same diameter as the ball drawn on it.

[0059] The first target line 11 is a straight line drawn on the main mat 1 along the longitudinal direction (left - right direction) of the main mat 1, and is a line used by imagining it as the straight line connecting the ball and the putter during putting practice. Also, the first target line 11 is drawn in a positional relationship passing through the center of the ball placement portion 10.

[0060] The first alignment portion 12 is a portion for determining the position of the placement sheet 2 along the longitudinal direction of the main mat 1 when the placement sheet 2 is stacked and arranged on the main mat 1, via the second alignment portion 21 and a fixing pin (not shown) described later.

[0061] The first alignment portion 12 is formed as a circular hole portion that penetrates the main body mat 1 in the vertical direction. Further, the first alignment portion 12 is provided above the first target line 11 and adjacent to the right end of the ball placement portion 10.

[0062] Further, the distance reference line 13 is a line indicating the position of the reference (0 m) of the distance display line 14 showing the distance from the ball placement portion 10 with respect to the ball placement portion 10. The distance reference line 13 is drawn as a straight line that intersects the first target line 11 and passes through the first alignment portion 12.

[0063] Further, a plurality of distance display lines 14 are provided at 5 cm intervals with respect to the distance reference line 13 along the cup direction or the direction opposite to the cup. The distance display line 14 is drawn in a direction orthogonal to the first target line 11. Further, the distance numerical value 15 is numerical information reflecting the distance between each distance display line 14 and the distance reference line 13.

[0064] Further, the first allowable marker 16 is a line indicating the maximum incident angle of the putter head with respect to the ball that is allowed for the ball hit out by the putter head to enter the cup within 1 m from the ball, toward the cup. The second allowable marker 17 is a line indicating the maximum emission angle of the ball that is allowed for the ball hit out toward the cup within 1 m from the ball to enter the cup.

[0065] Here, the first allowable marker 16 corresponds to the first allowable line in the claims of the present application, and the second allowable marker 17 corresponds to the second allowable line in the claims of the present application.

[0066] This first allowable marker 16 is a straight line passing through the first alignment portion 12, and the angle formed with the first target line is 5.61 degrees. Also, the second allowable marker 17 is a straight line passing through the first alignment portion 12, and the angle formed with the first target line is 1.87 degrees. Details of the setting of these angles will be described later.

[0067] Also, with respect to the distance reference line 13, the first allowable marker 16 and the second allowable marker 17 are located outside the first target line 11 in the direction opposite to the cup, and inside the first target line 11 in the cup direction. That is, they are drawn as lines corresponding to a so-called outside-in trajectory with respect to the first target line 11.

[0068] Also, the virtual ball portion 18 is a portion where a plurality of circular figures with the same diameter as the ball are drawn in the direction opposite to the cup from the distance reference line 14. The virtual ball portion 18 is a figure for making it easier to recognize the size of the golf ball.

[0069] Also, on the main body mat 1, when assuming the state where the placement sheet 2 is overlapped on the main body mat 1 with the first alignment portion 12 and the first target line 11 aligned with the second alignment portion 21 and the second target line 20 of the placement sheet 2, the position of the outer edge of the placement sheet 2 is indicated by a dashed line with a one-dot chain line marked as 2A.

[0070] Also, the main body mat 1 is a strip-shaped sheet member and can be formed of various materials such as carpet fabric, resin sheets, etc.

[0071] Here, it is not necessarily required that the ball placement portion 10 has a circular figure with the same diameter as the ball. As long as it is a circular figure serving as a mark for placing the ball, the diameter size is not limited. However, when practicing putting without placing the ball, it is preferable that the ball placement portion 10 has a circular figure with the same diameter as the ball from the point of making it easier to specifically imagine the ball.

[0072] Also, the first alignment portion 12 does not necessarily have to be formed as a circular hole that penetrates the main body mat 1 in the vertical direction. As long as alignment with the second alignment portion 21 is possible, its shape and formation method can be appropriately selected. However, from the perspective that the positions of the first alignment portion 12 and the second alignment portion 21 are aligned via a pin member (not shown) described later, and the placement sheet 2 can be rotatably supported around the position of the second alignment portion 21, it is preferable that the first alignment portion 12 is formed as a hole that penetrates the main body mat 1 in the vertical direction.

[0073] Also, the distance reference line 13, the distance display line 14, and the distance numerical value 15 do not necessarily have to be drawn on the main body mat 1. However, information on a plurality of straight lines provided at regular intervals and numbers corresponding to the distances from the ball placement portion 10, with the ball placement portion 10 as a reference, enables easy visual recognition of the distance from the ball placement portion 10. When practicing putting, it becomes easier to grasp the sense of distance. Therefore, it is preferable that the distance reference line 13, the distance display line 14, and the distance numerical value 15 are drawn on the main body mat 1.

[0074] Also, the distance display line 14 does not necessarily have to be provided at intervals of 5 cm based on the distance reference line 13, and the size of the interval can be appropriately set. For example, there may be a pattern where it is drawn at intervals of 10 cm.

[0075] Also, the first allowable marker 16 and the second allowable marker 17 do not necessarily have to be drawn on the main body mat 1. However, when putting a ball within 1 m from the cup, regarding the stroke direction of the putter head at impact, since it is possible to visually recognize the maximum incident angle of the putter head with respect to the ball for putting the ball into the cup, and thus practice putting, it is preferable that the first allowable marker 16 and the second allowable marker 17 are drawn on the main body mat 1.

[0076] Further, instead of the first allowable markers 16 and the second allowable markers 17, a main body mat 1A may be adopted in which third allowable markers 160 and fourth allowable markers 170 having a line-symmetrical positional relationship with the first allowable markers 16 and the second allowable markers 17 are provided based on the first target line (see FIG. 13).

[0077] Based on the distance reference line 13, these third allowable markers 160 and fourth allowable markers 170 are located inside the first target line 11 in the direction opposite to the cup and outside the first target line 11 in the cup direction (see FIG. 13).

[0078] That is, the third allowable markers 160 and the fourth allowable markers 170 can be used as lines corresponding to a so-called inside-out trajectory based on the first target line 11. Further, as a further aspect, an aspect in which four types, namely the first allowable markers 16 and the second allowable markers 17, and the third allowable markers 160 and the fourth allowable markers 170, are drawn on the main body mat 1 may also be adopted.

[0079] Also, it is not always necessary for the virtual ball portion 18 to be drawn on the main body mat 1. However, from the point that it can make it easier for the player to be more conscious of the diameter of the golf ball during putting practice, it is preferable that the virtual ball portion 18 is drawn on the main body mat 1.

[0080] [Display of the placement sheet] Subsequently, the display of the placement sheet 2 will be described. As shown in FIG. 1, on the placement sheet 2, a second target line 20, a second alignment portion 21, a plurality of putter trajectory curves 22, and a contact point perpendicular line 23 are displayed.

[0081] Here, the second target line 20 is a line regarded as parallel to the line connecting the positions of both shoulders during putting address when viewing the player in a plan view. When the player takes a stance so that the line connecting the positions of both shoulders during putting address is parallel to the second target line and performs the putting motion, among the plurality of putter trajectory curves 22, it becomes possible to confirm a curve close to the trajectory of one's own putter head.

[0082] Further, when the placement sheet 2 is stacked and placed on the main body mat 1, the second alignment portion 21 is a portion for determining the position of the placement sheet 2 along the longitudinal direction of the main body mat 1 by aligning with the first alignment portion 12 and via a fixing pin (not shown). The second alignment portion 21 is formed as a circular hole portion penetrating the placement sheet 2 in the vertical direction.

[0083] Further, the second alignment portion 21 is a portion that becomes the center position of rotation when the placement sheet 2 is placed with its orientation inclined with respect to the orientation of the main body mat 1.

[0084] That is, the positions of the first alignment portion 12 and the second alignment portion 21 are aligned, and a fixing pin (not shown) is inserted into the main body mat 1 and the placement sheet 2 from above to pivotally support the placement sheet 2 rotatably. The placement sheet 2 can be rotated around the second alignment portion 21 to change its inclination with respect to the main body mat 1 and be placed.

[0085] Further, the placement sheet 2 is a strip-shaped sheet material formed of a transparent film material and has a certain length in the left-right direction. Therefore, when the placement sheet 2 is placed with its orientation inclined with respect to the orientation of the main body mat 1, due to the length and self-weight of the placement sheet 2 itself, its position is less likely to shift in the rotational direction around the second alignment portion 21.

[0086] Further, the fixing pin is a T-shaped pin having a height of about 2 mm to 4 mm and has a shape and size that do not interfere with the movement of the putter head when hitting the ball placed on the ball placement portion 10 with the putter head.

[0087] In addition, the plurality of putter trajectory curves 22 are curves for checking the rotation trajectory of the player-specific putter head. The plurality of putter trajectory curves 22 are drawn on the placement sheet 2 as partial arc-shaped curves with different respective radii of rotation. Also, five putter trajectory curves 22 are drawn on the placement sheet 2.

[0088] Moreover, the partial arc-shaped curves in the plurality of putter trajectory curves 22 are drawn with respective radii of rotation of 843 cm, 411 cm, 273 cm, 195 cm, and 155 cm in order from the one closer to the second target line 20. Note that these numerical values are examples and can be set as appropriate.

[0089] In addition, all of the plurality of putter trajectory curves 22 are in contact with the second target line 20 at the position of the second alignment portion 21 on the second target line 20. That is, the position of the second alignment portion is the contact point, and the second target line 20 is the tangent line of each putter trajectory curve 22.

[0090] Here, the rotation trajectory of the player-specific putter head is the rotation trajectory in the stroke trajectory of the putter head with the player as the center of rotation in the putting operation. In this rotation trajectory, in a plan view, it has a player-specific radius of rotation.

[0091] In addition, the stroke trajectory of the putter head as mentioned here means the trajectory through which the shaft and the putter head pass during a rotational movement with a line connecting either the cervical vertebra or the thoracic vertebra of the player and the bottom surface of the putter head as the axis of rotation and either the cervical vertebra or the thoracic vertebra of the player as the center of rotation when addressing the putt.

[0092] Moreover, the bone of either the cervical vertebra or thoracic vertebra of the player referred to here means any one of the 7 cervical vertebrae or 12 thoracic vertebrae among the bones constituting the human spine. Which bone becomes the rotation center varies depending on the player's physique, the posture at address, the degree of elbow bending, etc., but in the rotation motion of the padding, one of the bones becomes the rotation center.

[0093] As shown in FIG. 6, in the rotation motion with a bone of either the cervical vertebra or thoracic vertebra of the player as the rotation center P, at the timing of impacting the ball, when looking at the player from the left side to the right side along the left-right direction, that is, when looking from the side direction of the player's body, a lie angle L is formed between the shaft S and the ground at address, and the line connecting the rotation center P and the bottom surface B of the putter head becomes an oblique line F inclined with respect to the vertical direction.

[0094] Then, from this state, with a bone of either the cervical vertebra or thoracic vertebra of the player as the rotation center P, the putter head is pulled against the ball (backward stroke), the putter head is moved toward the ball, the ball is impacted with the putter face, and then a follow-through (forward stroke) operation of further pushing out the putter head is performed.

[0095] Also, during the putting motion, the oblique line F moves in a state inclined with respect to the vertical direction. For example, as shown in FIG. 7, the oblique line F becomes an orbit passing through an inclined plane F' inclined with respect to the vertical direction.

[0096] Since these series of putting motions are rotation motions with a bone of either the cervical vertebra or thoracic vertebra of the player as the rotation center P, the orbits of the shaft and the putter head become the orbits of a pendulum motion by an inclined rotation axis (oblique line F) (a pendulum motion inclined with respect to the vertical direction).

[0097] And the plurality of putter orbit curves 22 of the placement sheet 2 are curves reflecting such a player-specific rotation orbit of the putter head. An example of the setting flow of the plurality of putter orbit curves 22 in the putter mat A will be described later.

[0098] Further, the contact vertical line 23 is a line indicating a direction orthogonal to the second target line 20 at the position of the second alignment portion 21. The contact vertical line 23 is drawn as a straight line passing through the second alignment portion 21 in a direction orthogonal to the second target line 20.

[0099] Here, it is not necessarily the case that the second alignment portion 21 is formed as a circular hole portion penetrating the placement sheet 2 in the vertical direction. As long as alignment with the first alignment portion 12 is possible, its shape and formation method can be appropriately selected. However, from the point that the positions of the first alignment portion 12 and the second alignment portion 21 can be aligned via a pin member (not shown) and the placement sheet 2 can be rotatably supported about the position of the second alignment portion 21, it is preferable that the first alignment portion 12 is formed as a hole portion penetrating the main body mat 1 in the vertical direction.

[0100] Also, it is not necessarily the case that five partial arc-shaped curves with different respective radii of rotation are provided as the plurality of putter trajectory curves 22, and the number of curves can be appropriately set. However, since it becomes easier to confirm the player-specific trajectory regarding the rotation trajectory of the player-specific putter head, it is preferable that a plurality of putter trajectory curves 22 are provided. Further, regarding the rotation trajectory of the player-specific putter head, it becomes a putter trajectory curve reflecting five different radii of rotation, and it becomes possible to show a wide range of radii of rotation on the placement sheet. Since it becomes easier to sufficiently correspond to the differences in the radii of rotation of the player-specific putter head's rotation trajectory in plan view, which vary depending on the player's physique, posture at address, degree of elbow bending, etc., it is even more preferable that five partial arc-shaped curves with different respective radii of rotation are provided as the plurality of putter trajectory curves 22.

[0101] Also, the placement sheet 2 does not necessarily have to be formed of a transparent material. However, when the placement sheet 2 is overlaid on the main body mat 1, the first target line 10 displayed on the main body mat 1 should be visible. As a result, the positional relationship between the first target line 10 and the plurality of putt trajectory curves 22 becomes easier to confirm, and it becomes possible to practice the putting motion while being conscious of not only the rotation trajectory of the putter head peculiar to the player but also the first target line. Therefore, it is preferable that the placement sheet 2 is formed of a transparent material. Also, not only a transparent material but also a translucent material can be adopted.

[0102] Regarding the putter mat A composed of the main body mat 1 and the placement sheet 2 described above, several examples of the placement of the placement sheet 2 will be described.

[0103] First, FIG. 2 shows a state in which the placement sheet 2 is laid flat on the main body mat 1 with the positions of the first target line 11 and the second target line 20 aligned.

[0104] This state is a state in which the placement sheet 2 is overlaid on the main body mat 1 without tilting the orientation of the placement sheet 2 with respect to the orientation of the main body mat 1 in the longitudinal direction (left - right direction) of the main body mat 1.

[0105] In the state shown in this FIG. 2, the first target line 11 and the second target line 20 overlap and form one straight line. In the state of FIG. 2, without using a ball, a player can confirm the rotation trajectory of the putter head peculiar to that player by repeatedly performing the putting motion.

[0106] At this time, the player takes a stance such that a straight line connecting the positions of both shoulders at the address of putting is parallel to the second target line 20 (the first target line 11). Then, assuming a state where a ball is placed on the ball placement portion 10, the putting motion is performed multiple times with the image of hitting this ball.

[0107] Here, if the player is a professional or an advanced player, with several putting motions, the stroke trajectory of the putter head in a plan view will form a substantially similar and stable trajectory. Also, even for a beginner, if they perform 20 to 30 putting motions, they can observe the stroke trajectory of their own putter head.

[0108] Then, the player compares the position relationship between the stroke trajectory of their own putter head and the five putter trajectory curves 22 on the placement sheet 2. That is, from the five putter trajectory curves 22 with different radii of rotation, the player confirms the curve that coincides with, or is close to, the stroke trajectory of their own putter head. Or, it may be possible to confirm that the middle between two putter trajectory curves 22 is close to the stroke trajectory of their own putter head.

[0109] In this way, by comparing the position relationship between the five putter trajectory curves 22 on the placement sheet 2 and the stroke trajectory of their own putter head, the player can determine the curve that serves as a reference for the stroke trajectory of their own putter head, or the position between two curves.

[0110] As a result, the player can perform repeated practice of the putting motion while being aware of the rotation trajectory and approximate radius of rotation of their own putter head when performing the putting motion, using the determined putter trajectory curve 22 or the position between two curves as a reference.

[0111] That is, instead of simply pulling and pushing the putter head straight, it becomes possible to practice putting while being aware of a rotational motion with either the cervical vertebra or thoracic vertebra of the player as the rotation center P. As a result, it becomes easier to acquire a reasonable stroke motion and the success rate of putting can be increased.

[0112] When comparing the plurality of putter trajectory curves 22 with the stroke trajectory of one's own putter head, when comparing with the putter trajectory curve 22, any position on the toe side (left outer corner) of the putter face surface, the center of the putter face surface (left center), or the heel side (left inner corner) of the putter face surface may be used as a reference. However, by comparing with the putter trajectory curve 22 based on the toe side of the putter face surface, the stroke trajectory of one's own putter head becomes most visible.

[0113] [Use with the placement sheet tilted] Next, with reference to FIGS. 3 and 4, the use of the placement sheet 2 in a tilted state with respect to the main body mat 1 will be described. The putter mat A shown in FIG. 3 or FIG. 4 is for a player who has a habit of hitting the ball in an open or closed direction with respect to the straight line connecting the ball and the cup in a plan view when hitting the ball, while allowing the player to grasp the rotational trajectory of the player-specific putter head and practice rolling the ball towards the cup. It is an example of the usage state of the putter mat A.

[0114] First, as described above, when the distance from the ball to the cup is set to about 1 m and a plurality of putting operations are performed, there is a tendency for people to be divided into those in whom the ball frequently misses the cup and deviates to the right side of the cup and those in whom the ball frequently deviates to the left side of the cup.

[0115] Here, as a major factor, for those in whom the ball frequently deviates to the right side of the cup, when hitting the ball, in a plan view, the orientation of the putter face surface does not become perpendicular (square) to the straight line connecting the cup and the ball, and the toe side of the putter head is inclined in the direction opposite to the cup compared to the heel side, that is, the so-called open orientation of the putter face surface. When hitting the ball with the putter face surface in an open orientation, the ball pops out based on the orientation of the putter face surface, and the rolling ball is likely to deviate to the right side of the cup.

[0116] Conversely, for those who frequently miss the ball to the left side of the cup, a major factor is that when hitting the ball, in a plan view, the orientation of the clubface is such that the toe side of the clubhead is inclined in the cup direction compared to the heel side, that is, the so-called closed orientation (closed) of the clubface. When hitting the ball with the clubface in a closed orientation, the ball will fly out based on the orientation of the clubface, and the rolling ball is likely to deviate to the left side of the cup.

[0117] Also, even for those who tend to tilt the clubface in an open or closed orientation during impact, even if the clubface is tilted at the impact timing, the stroke trajectory of the clubhead (the path that the clubhead moves before and after impact) is a circular trajectory centered on the player.

[0118] Therefore, when overlapping the placement sheet 2 on the main body mat 1 by combining the first alignment portion 12 and the position 21 of the second alignment portion, in accordance with the tendency of the inclination of the clubface at the player's impact, by tilting the orientation of the placement sheet 2 with respect to the orientation of the main body mat 1 and arranging it, while considering the tendency of the inclination of the clubface of the player, it becomes possible to practice the putting motion while visually being aware of the circular trajectory of the clubhead specific to the player.

[0119] For example, for those who tend to have an open orientation (open) of the clubface at impact, the arrangement of the placement sheet 2 shown in FIG. 3 can be considered.

[0120] In FIG. 3, the first alignment portion 12 and the second alignment portion 21 are aligned, and with the second alignment portion 21 as the center of rotation, the entire placement sheet 2 is tilted in a closed orientation (closed) with respect to the first target line 11 of the main body mat 1, and the placement sheet 2 is arranged. That is, in the plane of FIG. 3, the placement sheet 2 is tilted slightly counterclockwise with respect to the main body mat 1, and the entire placement sheet 2 is in a downward-left direction.

[0121] By tilting the placement sheet 2 as shown in Fig. 3, in a plan view, the second target line 20 is inclined with respect to the first target line 11, and the putter trajectory curve 22 also inclines together with the second target line 20. Also, at the portion of the second alignment portion 21, in a plan view, the surface (corresponding to the vertical reference line 23) perpendicular to the putter trajectory curve assumes a closed orientation (closed) when assuming the orientation of the putter face when impacting the ball.

[0122] Also, even when the placement sheet 2 is tilted, the player can swing while being conscious of a line on the putter trajectory curve 22 that is close to the trajectory of their own putt stroke.

[0123] And by being conscious of the putter trajectory curve 22 that is close to the trajectory of their own putt stroke, the player will also be conscious of the inclination (closed) of the surface perpendicular to the putter trajectory curve 22 at the portion of the second alignment portion 21 in a plan view and swing. Even if there is a tendency for the putter face to open at impact, it is affected by the inclination of the surface perpendicular to the putter trajectory curve 22. As a result, when actually hitting the ball, the orientation of the putter face approaches a direction perpendicular to the first target line, and it becomes easier to impact the ball with that orientation of the face. As a result, the hit ball is more likely to roll straight towards the cup.

[0124] In this way, taking into account the player's tendency for the putter face to open at impact, it is possible to practice acquiring the putting motion in which the ball rolls straight towards the cup.

[0125] Also, for example, for a person who has a tendency for the putter face to be in a closed orientation (closed) at impact, the arrangement of the placement sheet 2 shown in Fig. 4 can be considered.

[0126] In FIG. 4, the first alignment portion 12 and the second alignment portion 21 are aligned. With the second alignment portion 21 as the center of rotation, the entire placement sheet 2 is tilted in an open direction with respect to the first target line 11 of the main body mat 1, and the placement sheet 2 is placed. That is, in the plane of FIG. 4, the placement sheet 2 is slightly tilted in the clockwise direction with respect to the main body mat 1, and the entire placement sheet 2 is in a downward-right direction.

[0127] By tilting the placement sheet 2 as shown in FIG. 4, in plan view, the second target line 20 is inclined with respect to the first target line 11, and the putter orbit curve 22 is also inclined together with the second target line 20. Further, at the portion of the second alignment portion 21, in plan view, the surface (corresponding to the vertical reference line 23) perpendicular to the putter orbit curve 22 is in an open direction when assumed as the direction of the putter face surface when impacting the ball.

[0128] Also, even when the placement sheet 2 is tilted, the player can still swing while being conscious of a line on the putter orbit curve 22 that is close to the orbit of his own putt stroke.

[0129] And by being conscious of the putter orbit curve 22 that is close to the orbit of his own putt stroke, the player also becomes conscious of the inclination (open) of the surface perpendicular to the putter orbit curve 22 at the portion of the second alignment portion 21 in plan view and swings. Even if there is a tendency for the putter face surface to close at impact, it is affected by the inclination of the surface perpendicular to the putter orbit curve 22. As a result, when actually hitting the ball, the direction of the putter face surface also tends to approach a direction perpendicular to the first target line 11, and it becomes easier to impact the ball with that surface direction. As a result, the hit ball is more likely to roll straight toward the cup.

[0130] In this way, taking into account the player's tendency for the putter face surface to close at impact, practice can be carried out to acquire the putting motion in which the ball rolls straight toward the cup.

[0131] Note that the inclination of the placement sheet 2 shown in FIGS. 3 and 4 is merely an example, and the degree of the inclination can be appropriately set according to the inclination of the clubface at the time of impact.

[0132] Also, when hitting the ball, if the player can impact with the face of the club at a right angle (square) to the line connecting the ball and the cup, as shown in FIG. 2, putting practice can be performed with the placement sheet 2 laid flat on the main body mat A.

[0133] Subsequently, with reference to FIG. 2, the use of the first allowable marker 16 and the second allowable marker 17 will be described. By using the first allowable marker 16 and the second allowable marker 17 on the main body mat 1, the success rate of putting within 1 m from the cup can be increased.

[0134] Here, in a plan view, the tangent line of the rotation trajectory of the player-specific putter head at the time of impact, in other words, the stroke direction of the putter head at the time of impact (the direction in which the putter head attempts to move at the time of impact), is within the range surrounded by the first target line 11 and the first allowable marker 16, and the putting motion is performed with the image that the putter head is within this range.

[0135] At the same time, the putting motion is also performed while being conscious of the putter trajectory curve 22 that serves as a guide for the stroke trajectory of one's own putter head. This is not only at the time of impact but also in a series of backward stroke, impact, and forward stroke, and is to be conscious of a trajectory that forms a partial arc shape.

[0136] And if the stroke direction of the putter head at the time of impact is within the range surrounded by the first target line 11 and the first allowable marker 16, and in a plan view, the clubface at the time of impact is at a right angle (square) to the first target line 11, the hit ball will roll within the range surrounded by the first target line 11 and the second allowable marker 17.

[0137] That is, the ball can be rolled at an emission angle of the ball that enters the cup within 1 m from the ball to the cup. By performing a putting motion while being aware of the first allowable marker 16, the player can increase the success rate of putting the ball into the cup within 1 m from the ball.

[0138] In addition, the angle formed by the first allowable marker 16 and the first target line 11 is 5.61 degrees. When this angle is visually recognized, the player can grasp it as a relatively reasonable angle range and can perform the putting motion with a sense of security.

[0139] Note that the detailed principle for putting the ball into the cup within 1 m from the ball by using the first allowable marker 16 and the second allowable marker 17 will be described later.

[0140] [Setting of Putter Trajectory Curve] Next, an example of setting the putter trajectory curve 22 on the putter mat A will be described.

[0141] As repeatedly described so far, except for special putting motions, in many players, the trajectory of the putter head stroke takes the rotation trajectory of the player-specific putter head with the player as the rotation center.

[0142] For example, as shown in FIG. 5, when viewed in a plan view of the player and a putting motion is performed by impacting the ball Q placed on the putter face surface E, the trajectory of the putter head becomes a trajectory of a partial arc-shaped curve C.

[0143] In addition, an example of setting one curve among the plurality of putter trajectory curves 22 is shown.

[0144] As shown in Fig. 6, when addressing the putter, assuming that when viewed from the side direction (left - right direction) of the player's body, the rotation center P of this player is the vertebra prominens (seventh cervical vertebra), and the distance from the rotation center P to the center B of the bottom surface of the putter head is 150 cm. That is, the length of the diagonal line F connecting the rotation center P and the center B of the bottom surface of the putter head is 150 cm.

[0145] Also, when viewed from the rotation center P, assuming the position of the ground directly below is position G, the distance between position G and the center B of the bottom surface of the putter head is 40 cm. Also, an angle indicated by the lie angle L is formed between the shaft S of the putter and the ground (see Fig. 6). Based on this premise, the distance H between the rotation center P and position G is obtained. Note that the distance H corresponds to the height from the ground at the position of the vertebra prominens of this player.

[0146] Based on the above - mentioned premise, first, regarding the angle α formed between the line connecting the rotation center P and position G and the diagonal line F, the angle α is obtained from trigonometric functions as "sinα = 40 / 150 ≒ 0.2677", "α = 15.527 ≒ 15.5°", and the angle α can be approximated as 15.5°. Also, when calculating the distance H using trigonometric functions, it becomes "H = cos(15.5)×150 ≒ 0.9636×150", and from "H = 144.54 ≒ 145", the value of H is obtained as 145 cm.

[0147] Also, as shown in Fig. 7, when viewing the same player from the front, comparing the position of the putter head at the time of impact (the 0 - cm position) and the position B2 of the putter head at a certain point in the orbit of the forward stroke after impact, the height y (cm) of the putter head from the ground at the position B2 of this putter head is calculated.

[0148] As shown in Fig. 7, assuming that the distance x from the position of the putter head at the time of impact (the 0 - cm position) to the position of the ground on the extension line of the diagonal line F (or the extension line of the shaft S) at the position B2 of the putter head is 25 cm. That is, the left - right direction distance x from the position at the time of impact to the position of the ground on the extension line of the putter head at the position B2 of the putter head is 25 cm.

[0149] Also, the distance between the rotation center P and the position G (corresponding to the symbol H in FIG. 6) is 145 cm. In this case, for the angle β formed by the line connecting the rotation center P and the position G and the diagonal line F, when calculating the angle β from trigonometric functions, we have "tanβ = 25 / 145 ≒ 0.1724", "β = 9.781 ≒ 9.78°", and the angle β can be approximated as 9.78°. Also, when calculating the distance y using trigonometric functions, we get "y = 145 - {cos(9.78)×145} ≒ 145 - (0.9854×145)", and from "y = 2.117 ≒ 2.12", the value of y is obtained as 2.12 cm.

[0150] Then, as shown in FIG. 8, when viewed from the side direction (left - right direction) of the player's body, the distance z (cm) along the inside - outside direction between the position corresponding to the position B2 of the putter head in FIG. 7 and the position B of the putter head at impact is calculated.

[0151] In FIG. 8, from the values obtained so far, with the angle α = 15.5° and the height y of the putter head from the ground at the position B2 being 2.12 cm, when calculating the distance z using trigonometric functions, we have "tan15.5 = z / 2.12", so "z = 0.2773×2.12", and from "z = 0.58787 ≒ 0.588", the value of z is obtained as 0.588 cm.

[0152] Through the above process, for a player with the distance from the rotation center P to the center B of the bottom surface of the putter head being 150 cm, the values of "x, y, z" for a point on the stroke trajectory of the player's putter head are obtained as "25 cm, 2.12 cm, 0.588 cm".

[0153] Also, in the stroke trajectory of the player's putter head, by taking x (cm) as a variable, the values of y and z corresponding to different values of x can be obtained. As shown in FIG. 9, with 0 cm on the horizontal axis as the origin O and the distance from the origin O as x (cm), and the vertical axis representing the distance downward from the origin O(0 cm) as z (mm), when plotting the values of x and z, the plots shown by the symbols I1~I5 are obtained.

[0154] Then, when determining the curves approximating each of the plots I1 to I5 from known graphic programs, it is possible to draw a partial arc-shaped curve C1 that approximates each of the plots I1 to I5 from the origin O. Also, when the curve C1 is horizontally flipped with reference to the vertical line passing through the origin O, it is possible to draw a partial arc-shaped curve C2 extending from the origin O.

[0155] The combined curve of this curve C1 and curve C2 becomes the curve of the rotation trajectory of the player-specific putter head with the player as the rotation center in a plan view state for a player in which the distance from the rotation center P to the center B of the bottom surface of the putter head is 150 cm. Also, the rotation radius of this curve becomes the rotation radius of the player-specific putter head in a plan view. Further, if this rotation radius is "R = 273 cm", the partial arc-shaped curve with this rotation radius of R = 273 cm can be adopted and displayed as one of the putter trajectory curves 22 in the placement sheet 2.

[0156] In the above process, one of the putter trajectory curves 22 can be created. Also, from the putting operations of players with different rotation radii (R) above, by drawing curves C1 and C2 in the same process, different putter trajectory curves 22 can be obtained. By creating five of these, it becomes possible to create the five putter trajectory curves 22 on the placement sheet 2.

[0157] [Other Drawing Methods for Putter Trajectory Curves] As a simpler method for setting the putter trajectory curve, the following drawing method for the putter trajectory curve can be adopted. Here, a reference point assumed as the position where the ball is placed and a target line which is a straight line passing through the reference point are provided, and along this target line, the putter stroke movement is made with the image of impacting the ball at the reference point by the player.

[0158] Next, determine the position of a point on the trajectory of the putt stroke, and draw an approximate curve (first curve) that connects the determined point and the reference point in a plan view. Also, in a plan view, draw a second curve that has a line-symmetric positional relationship with the first curve with respect to an orthogonal line that passes through the reference point and is orthogonal to the target line. The first curve and the second curve are partial arc-shaped curves, and the combined curve of the first curve and the second curve becomes the curve of the rotation trajectory of the player-specific putter head with the player as the center of rotation in the state of being viewed in a plan view. Also, the radius of rotation of this curve becomes the radius of rotation of the player-specific putter head.

[0159] In this way, based on the position of a point on the trajectory of the putt stroke, it is possible to obtain the curve of the rotation trajectory of the putter head specific to the player in a simple manner.

[0160] Also, according to this method, it is also possible to create a putter mat dedicated to the player using the obtained curve of the rotation trajectory of the putter head specific to the player. Also, it is possible to periodically create the curve of the rotation trajectory of the putter head specific to the player and compare the curves at different times, and use it as information for analyzing changes in the putting motion and fluctuations in the condition.

[0161] [Regarding the setting of the first allowable marker and the second allowable marker] Hereinafter, the setting of the first allowable marker 16 and the second allowable marker 17 will be described. First, as a premise, the present inventor has found the "1:3 law of angular directionality" and the "1:3 law of distance directionality" regarding the movement of the ball itself during putting.

[0162] Here, as shown in FIG. 10, a ball Q was placed, and four balls 1 to 4 were arranged at equal intervals in the vertical direction as viewed in FIG. 10 at a distance of about 50 cm from the ball Q (putting distance). Also, the ball 1 is arranged in a straight line direction as viewed from the ball Q.

[0163] Then, on the clubface E, the ball Q is hit in the direction of the stroke direction H1 of the clubhead at impact. Also, the orientation of the clubface E at impact is set to be perpendicular (square) to the straight line direction connecting the ball Q and the ball 1.

[0164] Due to this putting, the hit ball Q rolls in the direction of reference H2 and hits the ball 2.

[0165] From this phenomenon, when assuming the straight line direction connecting the ball Q and the ball 1 as the straight line connecting the ball and the cup, the "angle formed between the straight line connecting the ball and the cup and the stroke direction H1 of the clubhead at impact" and the "angle formed between the straight line connecting the ball and the cup and the direction in which the ball Q is hit (the direction of reference H2)" are in a "1:3" relationship in terms of the magnitude of the angle. This is referred to as the "1:3 law of angular directionality".

[0166] Also, as shown in Fig. 10, in the arrangement direction of the four balls (the vertical direction in Fig. 10) based on the straight line connecting the ball Q and the ball 1, the distance L3 from the position of the ball Q at impact to the position of the ball 2 that the hit ball Q hits, and the distance L1 to the position on the extension line of the stroke direction H1 of the clubhead at impact, are in a "1:3" relationship in terms of the length of the distance. This is referred to as the "1:3 law of distance directionality".

[0167] The "1:3 law of angular directionality" and the "1:3 law of distance directionality" are reorganized in Fig. 11. Place the ball Q on the line 100 connecting the ball Q and the cup, set the clubface E perpendicular to the line 100, and hit the ball Q in the stroke direction H1 of the clubhead at impact. Then, the hit ball Q will roll in the direction of reference H2. Also, the hit ball Q will pass through the position of reference Q'.

[0168] In the movement of the ball during this putting, the angle formed by line 100 and the extension line 16a of the stroke direction H1 of the putter head at impact is 3θ, and the angle formed by line 100 and the extension line 17a of the direction H2 in which the hit ball Q rolls is θ.

[0169] Also, in the direction perpendicular to line 100, with respect to the distance L1 to the position of Q', the distance L3 to the extension line 16a at the position corresponding to the ball Q' is three times the distance.

[0170] Also, in the stroke operation of putting, the trajectory of the putter head in a plan view is a partial arc-shaped trajectory of the curve C of the rotational trajectory of the putter head specific to the player.

[0171] Based on this "1:3 law of angle directionality" and "1:3 law of distance directionality", angles of 5.61 degrees and 1.87 degrees are set for the first allowable marker 16 and the second allowable marker 17.

[0172] As shown in FIG. 12, the actual radius of the cup K1 is 5.4 cm. Also, the radius of the ball is 2.13 cm. Here, assuming the distance between the ball Q and the cup K1 is 100 cm (1 m), and the line connecting the ball Q and the cup K1 is line 100.

[0173] Also, to hit the ball Q in a direction perpendicular to line 100 and make it fall into the cup K1 100 cm ahead, considering the relationship between the diameter of the ball and the radius of the cup K1, the angle formed by the line 100 and the direction of emission of the ball Q needs to be within 1.87 degrees.

[0174] Also, based on the above-mentioned "1:3 law of angle directionality" and "1:3 law of distance directionality", to hit the ball Q so that the angle formed by the line 100 is within 1.87 degrees, the angle formed by the extension line of the stroke direction of the putter head at impact and the line 100 needs to be within 5.61 degrees.

[0175] That is, the angle formed by the first allowable marker 16 on the main body mat 1 and the first target line 11 is set based on 5.61 degrees, which is the angle formed by the extension of the stroke direction of the putter head at impact, shown in FIG. 12, and the line 100. Further, the angle formed by the second allowable marker 17 on the main body mat 1 and the first target line 11 is set based on 1.87 degrees, which is the launch angle of the ball for the hit ball Q to enter the cup K1 100 cm ahead, shown in FIG. 12.

[0176] As shown in FIG. 12, for example, the player can have the following image as an image during putting. First, when a perpendicular line is drawn from the center position of the cup K1 on the line 100 to the extension side of the stroke direction of the putter head at impact, the distance therebetween is 9.8 cm. The difference between this 9.8 cm distance and the radius of the cup K1 is 4.4 cm.

[0177] That is, the extension of the stroke direction of the putter head at impact passes through a distance of 4.4 cm further outside from the outer peripheral portion of the cup K1. Considering the cup K2 for imaging based on this, the radius of the cup K2 is about 7.6 cm.

[0178] This is about 1.5 times the radius of the actual cup K1. When putting, the player can image the cup K2 and stroke in the direction of its left edge. That is, by being conscious of the first allowable marker 16 on the main body mat 1, it becomes possible to putt while imaging a cup larger than the actual cup.

[0179] As another example of the putter mat to which the present invention is applied, the aspect of the putter mat C shown in FIGS. 14 and 15 can also be adopted. In the putter mat C shown in FIG. 14, the placement sheet 2a is formed longer than the main body mat 1 in its longitudinal direction. For the part of the placement sheet 2a that performs the same function as the placement sheet 2, the reference numeral attached to the placement sheet 2 is suffixed with "a" and detailed description is omitted.

[0180] In this long placement sheet 2a, five track curves 22a are shown to be longer than the pattern track curve 22 of the normal placement sheet 2. These track curves 22a can be used not only to check the rotation track of the player-specific putter head, but also to check the rotation track of the player-specific head when swinging with clubs other than the putter.

[0181] That is, not only for the putter, but also for clubs such as drivers, fairway woods, utilities, irons, and wedges, the stroke track of the head when impacting the ball with the head of each club is, like that of the putter, a partial arc-shaped track centered on the player in a plan view, and is a track having a player-specific rotation radius.

[0182] Therefore, by using the long placement sheet 2a shown in FIG. 14a and the plurality of track curves 22a displayed thereon, it becomes possible to grasp the rotation track of the player-specific head of the heads of other clubs, which has a larger stroke track than the putter.

[0183] Also, as shown in FIG. 15, similar to the placement sheet 2, with the second alignment portion 21a as the rotation center, the placement sheet 2a is tilted with respect to the main body mat 1, and for a player who has a habit of impacting with the face surface of the head in an open or closed direction with respect to the straight line connecting the ball and the target point at the time of impact, it is also possible to practice hitting the ball while grasping the rotation track of the player-specific head.

[0184] The putter mat A described above can be used to repeatedly practice the putting operation while being conscious of the rotational movement of the putter head centered on the player by checking the rotation track of the player-specific putter head using the putter track curve 22 of the placement sheet 2.

[0185] As described above, the putter mat to which the present invention is applied enables practice of the putter that can increase the success rate of putting. In addition, the method for drawing a putting trajectory curve to which the present invention is applied contributes to the practice of putting that enhances the success rate of putting.

[0186] As described above, the invention made by the present inventor has been specifically described based on the embodiments. However, the present invention is not limited to the above embodiments, and it goes without saying that various modifications are possible without departing from the gist thereof.

Explanation of Reference Numerals

[0187] A Putting Mat 1 Main Body Mat 10 Ball Placement Portion 11 First Target Line 12 First Alignment Portion 13 Distance Reference Line 14 Distance Display Line 15 Distance Numerical Value 16 First Allowable Marker 160 Third Allowable Marker 17 Second Allowable Marker 170 Fourth Allowable Marker 18 Virtual Ball Portion 2 Placement Sheet 20 Second Target Line 21 Second Alignment Portion 22 Putting Trajectory Curve 23 Contact Point Vertical Line 100 Line P (Player's) Rotation Center S Shaft L Lie Angle F Diagonal Line F' Inclined Plane B (Putting Head's) Bottom Surface Q Ball Q' Ball E Putting Face C (Partially Arc-shaped) Curve K1 Cup K2 Image Cup C Putting Mat 2a Configuration Sheet 20a Second Target Line 21a Second Alignment Portion 22a Pattern Orbit Curve 23a Contact Perpendicular Line

Claims

1. A strip-shaped main body mat, A first target line which is a straight line displayed on the main body mat along the longitudinal direction of the main body mat, A circular figure displayed on the main body mat, the center of which is arranged at a position through which the first target line passes, and a ball placement portion indicating a position for placing a ball, A first alignment portion provided on the first target line of the main body mat and adjacent to the ball placement portion, A strip-shaped placement sheet that can be arranged on top of the main body mat, A second target line which is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, Provided on the second target line of the placement sheet, when the placement sheet is arranged on top of the main body mat, it serves as a reference for aligning with the position of the first alignment portion, and when the placement sheet is arranged with its orientation tilted with respect to the orientation of the main body mat, it serves as a rotation center for the second alignment portion, A plurality of curved lines with different radii in the shape of partial arcs displayed on the placement sheet, and each curved line is a putt trajectory curve that touches the second target line at the position of the second alignment portion Putt mat.

2. It has a pin member that is inserted into the positions of the first alignment portion and the second alignment portion and enables the placement sheet to be rotatable with respect to the main body mat The putt mat according to claim 1.

3. The putt mat according to claim 1 or claim 2, wherein five putt trajectory curves are provided The putt mat according to claim 1 or claim 2.

4. On the main body mat, a plurality of distance display lines indicating a distance at regular intervals with the first alignment portion as a reference are displayed along the first target line The putt mat according to claim 1 or claim 2.

5. The putt mat according to claim 1 or claim 2, wherein the placement sheet is formed of a transparent or semi-transparent member The putt mat according to claim 1 or claim 2.

6. The main body sheet, In the direction along the first target line, A first allowable line which is a straight line passing through the first alignment portion and forms an angle of 5.61 degrees with the first target line, A second allowable line which is a straight line passing through the first alignment portion, is provided between the first target line and the first allowable line, and forms an angle of 1.87 degrees with the first target line are displayed The putt mat according to claim 1 or claim 2.

7. The main body sheet, In the direction along the first target line, A third allowable line which is a straight line passing through the first alignment portion and has a line-symmetric positional relationship with the first allowable line with respect to the first target line, and a fourth allowable line which is a straight line passing through the first alignment portion and has a line-symmetric positional relationship with the second allowable line with respect to the first target line were displayed The putter mat according to claim 6.

8. A strip-shaped main body mat, A first target line which is a straight line displayed on the main body mat along the longitudinal direction of the main body mat, A circular figure displayed on the main body mat, the center of which is arranged at a position through which the first target line passes, and a ball placement portion indicating a position where a ball is placed, A first alignment portion provided on the first target line of the main body mat and adjacent to the ball placement portion, A strip-shaped placement sheet that can be placed on top of the main body mat, A second target line which is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, A second alignment portion provided on the second target line of the placement sheet, which serves as a reference for aligning with the position of the first alignment portion when the placement sheet is placed on top of the main body mat, and which becomes the rotation center when the placement sheet is tilted in orientation with respect to the orientation of the main body mat, A putter track curve which is a partial arc-shaped curve displayed on the placement sheet and is tangent to the second target line at the position of the second alignment portion Putter mat.

9. A strip-shaped main body mat, A first target line which is a straight line displayed on the main body mat along the longitudinal direction of the main body mat, A circular figure displayed on the main body mat, the center of which is arranged at a position through which the first target line passes, and a ball placement portion indicating a position where a ball is placed, A first alignment portion provided on the first target line of the main body mat and adjacent to the ball placement portion, A strip-shaped placement sheet that can be placed on top of the main body mat, A second target line which is a straight line displayed on the placement sheet along the longitudinal direction of the placement sheet, A second alignment portion provided on the second target line of the placement sheet, which serves as a reference for aligning with the position of the first alignment portion when the placement sheet is placed on top of the main body mat, and which becomes the rotation center when the placement sheet is tilted in orientation with respect to the orientation of the main body mat, A plurality of partial arc-shaped curves displayed on the placement sheet, and each curve is tangent to the second target line at the position of the second alignment portion, and is a line simulating the trajectory of a predetermined pendulum motion that is the stroke trajectory of the putter head when viewed from the side direction, which is the direction connecting the ball and the cup. A putter mat.

10. The predetermined pendulum motion is a circular motion passing through an inclined plane that forms an angle with the vertical direction when viewed from the side direction. The putter mat according to claim 9.

11. A position information acquisition step of displaying a reference point and a target line that is a straight line passing through the reference point, causing the player to make a putt stroke movement along the target line with the reference point as the position where the ball is placed, and acquiring the position information of the putter head at at least one point on the trajectory of the movement; A first curve drawing step of drawing a partial arc-shaped curve connecting the position of the position information acquired in the position information acquisition step and the reference point in a plan view; A second curve drawing step of drawing a partial arc-shaped curve that is symmetric with respect to the curve drawn in the first curve drawing step with respect to an orthogonal line that passes through the reference point and is orthogonal to the target line in a plan view. A method for drawing a putter trajectory curve.

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