JP2009273582A - Golf putter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf putter whose putter head moves on a line connecting a ball and a target and on its extended line and does not get off the hitting point (sweet spot) when it hits the ball. <P>SOLUTION: The golf putter has a putter head which has a face for hitting a ball in the front face and includes a curved or plane sole on the bottom and a shaft which has a grip at an end. The golf putter has a protrusion formed on the other end so that the angle formed by a projection of the shaft on a vertical plane penetrating a toe and a heel of the face and a vertical line can be maintained and a contact surface of the most protruding point of the sole in the case of a curved sole or the sole in the case of a plane sole is in parallel with the horizontal plane with the putter suspended from the gripping center position of the joining right/left hands on the grip provided with the shaft. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a golf putter, and more particularly to a putter in which a putter head moves on a line connecting a ball and a target and an extension line when the putter is stroked and does not deviate from a hitting point (sweet spot). Is.

  A typical putter is that the putter head is pulled inward by gravity as soon as takeback is started from the state where the ball hits the hitting point (sweet spot) provided on the face of the putter head. Will be taken back with the heel raised. As a result, at the time of impact, it does not hit the sweet spot properly, and there is a very strong tendency to hit the part shifted from the sweet spot in the head tip direction of the head, so the face opens at the time of impact, and in a putter with a loft angle, If the ball is impacted in the heel-up state, the ball will be rotated clockwise, making it difficult to roll the ball accurately in the intended target direction.

For such a problem, when the center of gravity of the putter head 2 as shown in FIG. 8 is on the extension line of the shaft 3 and the shaft 3 of the putter 11 is held horizontally, the face 20 becomes horizontal. A number of putters having a “balance” structure (for example, Patent Document 1) are provided.
JP-A-6-285186

  However, even when putting with a putter as shown in FIG. 8, the problem was not solved sufficiently with the putter having this structure.

  That is, like the putter 12 of FIG. 9, the putter 12 is such that the sole 22 is horizontal in a state where the grip 30 provided on the shaft 3 is hung with the center position when the left and right hands are combined as a fulcrum. When the stroke is made, the putter head 2 moves on the line connecting the ball and the target and on the extension line just by moving the pendulum, and the face 20 becomes a vertical plane with respect to the line, and is shifted from the sweet spot. It is possible to hit the ball without being described in the Rules of Japan Golf Association (Attached Rules II-1-1d, alignment (i)). “The straight part of the shaft to the vertical plane that penetrates the toe and heel. 8 ”must be at least 10 degrees with respect to the vertical line.”) According to the golf club configuration regulations, the angle α shown in FIG. Over 12 proposed, manufacturing, have never been used.

  In view of such a situation, the purpose of the present invention is to provide a putter that moves on the line connecting the ball and the target and on the extension line of the putter head and does not deviate from the hit point (sweet spot) when hitting the ball. .

  In view of such a situation, the first invention of the present invention has a putter head having a face for striking a ball on the front surface and a curved or flat sole on the bottom surface, and a shaft having a grip on one end. The angle formed by the projection of the shaft on the vertical plane passing through the toe and heel of the face with respect to the vertical line with the putter suspended from the center position when the grip is gripped by combining left and right hands For golf courses where the other end of the shaft protrudes from the putter head so that the flat surface of the sole is parallel to the horizontal plane. It is a putter.

The second aspect of the present invention is a putter head having a face for hitting a ball on the front surface, a curved or flat sole on the bottom surface, a grip on one end, and the other end protruding on the putter head. With the shaft suspended from the center position when the grip is gripped with a combination of left and right hands, the cross section through the center of gravity of the putter head is parallel to the horizontal plane. It is a golf putter protruding from the putter head.
Here, when the putter head is in a balanced state with the center of gravity of the putter head as a fulcrum, the cross section of the putter head by the horizontal plane that passes through the center of gravity is the transverse section that passes through the center of gravity of the putter head.

  According to a third aspect of the present invention, when the golf putter is made to stand on a horizontal plane, the angle formed by the projection of the shaft on the vertical plane passing through the toe and heel of the face does not change. Golf putter.

  According to a fourth aspect of the present invention, there is provided a putter head having a face for hitting a ball on the front surface, a curved or flat sole on the bottom surface, a grip on one end, and the other end protruding on the putter head. The shaft is suspended from the center position when the grip is combined with the left and right hands, and the putter is suspended on the vertical line of the center position when the grip is combined with the left and right hands. This golf putter is characterized in that the shaft projects from the putter head so that the center of gravity is located.

  According to a fifth aspect of the present invention, there is provided a putter head having a face for hitting a ball on the front surface, a curved or flat sole on the bottom surface, a grip on one end, and the other end protruding on the putter head. The center position of the grip when the left and right hands are combined, the center of gravity of the putter head, and the ball hitting point on the face surface are the lines of play intended. The putter head is projected so as to be positioned on the same vertical plane along the golf putter.

  According to a sixth aspect of the present invention, there is provided a putter head having a face for hitting a ball on the front surface, a curved or flat sole on the bottom surface, a grip at one end, and the other end protruding from the putter head. In the state where the putter is suspended with the center position when the grip is gripped by combining the left and right hands, the force applied to the center position when the grip is gripped by combining the left and right hands The golf putter is characterized in that the shaft projects from the putter head so that the moment, the moment of force by the shaft, and the moment of force by the putter head are canceled out.

  According to a seventh aspect of the present invention, the center of gravity of the putter head, the center position when the grip is gripped by combining left and right hands, and the center of gravity of the shaft are located on a vertical plane that penetrates the center of gravity of the putter head. Projection to the horizontal plane that penetrates the center of gravity of the head, the center of gravity of the shaft, the center position when the grip is held in combination with the left and right hands, the order of the center of gravity of the putter head, or the center of gravity of the putter head, the grip to the left and right hands The golf putter is characterized by being positioned in the order of the center position when gripped in combination and the center of gravity of the shaft.

The eighth invention of the present invention is a golf putter in which the shaft of the golf putter according to any one of the first to seventh inventions is projected from the toe side upper surface of the putter head.
According to a ninth aspect of the present invention, there is provided a golf putter shaft according to any one of the first to seventh aspects, wherein the shaft of the putter head protrudes from the upper surface of the center portion or the upper surface of the heel side, and the sole. Is a golf putter that is bent in the toe side direction to a height within 127 mm.

  According to a tenth aspect of the present invention, when the sole of the golf putter according to any one of the first to ninth aspects of the present invention makes the putter stand on a horizontal plane, the vertical plane penetrates the toe and heel of the face. The golf putter has a shape that does not change the angle formed by the projection of the shaft with respect to the vertical line.

According to the golf putter of the present invention, while holding the putter, the sole is kept horizontal without any action, and the impact is met according to the lie angle when held, and the face is the ball. Because the impact with the ball can be met according to the loft angle of the face against the line connecting the target, the hit point of the face (from beginners who have just started golf to advanced players including professionals) The probability of catching the ball with a sweet spot (also called a core) and the probability of accurately rolling the ball toward the target are greatly increased.
In addition, it has the effect of suppressing the failure of manipulating the putter head in the dark clouds and disturbing the trajectory of the stroke, or the force to grip the grip too much to give a proper hit to the ball. is doing.

  The present invention finds a putter suitable for catching a ball reliably at a hitting point (also called a sweet spot or core) of a face and rolling the ball toward an intended play line. In the state where the putter is suspended with the center position (hereinafter referred to as the grip center position) when gripping hands combined, the surface forming the sole or its contact surface is parallel to the horizontal plane, or the putter A cross section passing through the center of gravity of the head is parallel to the horizontal plane.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram for explaining the outline of the putter of the present invention. FIGS. 1A and 1B are putters of the first invention and the third invention, and FIG. 1C is the second invention and third. 1 (d) is a diagram for explaining the contact surface of the curved sole, wherein 1 is the putter, 2 is the putter head, H is the center of gravity of the putter head, G is the grip center position, 21a is the toe, 21b is the heel, 22 is the sole, 22a is the most convex point, 22b is the tangent surface at the most convex point, and α is the angle formed by the projection of the shaft on the vertical plane passing through the toe and heel of the face with respect to the vertical line. Note that 90 degrees −α is the “lie angle”.
FIG. 2 is a diagram for explaining the outline of the putter according to the fourth aspect of the invention. As shown in FIG. 2, the center of gravity P of the putter is located on the vertical line of the grip center position G.

FIG. 3 is an external perspective view of the golf putter of the fifth aspect of the present invention.
In FIG. 3, 1 is a putter, 2 is a putter head, 3 is a shaft, 20 is a face, 21a is a toe, 21b is a heel, 22 is a sole, 23 is a hit point (sweet spot), 30 is a grip, 31 is a neck , N _L is the length from the sole 22 to the upper end of the neck 31, α is the angle (degree) relative to the vertical line of the projection of the shaft onto the vertical plane passing through the toe and heel of the face, and β is the line of the intended play The angle (degree) relative to the vertical line of the projection of the shaft onto the vertical plane along, z ₀ is the horizontal plane that passes through the center of gravity of the putter head, x ₀ is the vertical plane that passes through the toe and heel of the face, and the vertical plane of the horizontal plane z ₀ , y ₁ is the center of gravity of the putter head, grip the center position, and a vertical plane along the play line intended through the hit突点.
Here, the intended line of play means the straight line connecting the target and the ball, and in the projection of the shaft, it is used to mean the projection of the straight part of the shaft, and the meanings of terms such as face toe and heel are Refers to the Japan Golf Association regulations.

  FIG. 4 is an external perspective explanatory view showing another embodiment of the fifth invention as in FIG. A hatched triangle in the figure is a triangle formed by the grip center position G, the center of gravity H of the putter head, and the hitting point 23.

FIG. 5 is a diagram for explaining the outline of the sixth invention and the seventh invention putter. FIG. 5 (a) is a side view, and FIGS. 5 (b) and 5 (c) are views seen from the z direction. FIG. 5C is a schematic diagram for analysis in the putter of FIG. 5C when the angle β = 0.
In FIG. 5, m is the weight of the shaft, M is the weight of the putter head, L _g is the distance from the intersection point O between the central axis of the shaft and the horizontal plane z ₀ that passes through the center of gravity of the putter head, to the grip center position G, L _s is the distance from the intersection O to the center of gravity S of the shaft, L _h is the distance from the intersection point O to the center of gravity H of the putter head. d _s is a horizontal distance from the grip center position to the center of gravity of the shaft, and d _h is a horizontal distance from the grip center position to the center of gravity of the putter head.

FIG. 6 is a view showing a projecting form of the shaft to the putter head, and FIG. 6A shows a shaft projecting on the upper surface of the heel side and having a neck bent in the toe side direction having a height _NL. FIG. 6B shows a shaft having a neck projecting from the upper surface of the center portion and similarly having a neck bent in the toe side direction having a height N _L.
FIG. 7 is an explanatory diagram of the sole shape of the putter head.

1 (a) and 1 (b), when the grip center position is suspended as a fulcrum, in the case of a curved sole as shown in FIG. The planar sole as shown in FIG. 1B is a putter whose sole surface is parallel to the horizontal plane. Here, the most convex point is a portion that protrudes most convexly on the curved surface as shown in FIG.
In FIG.1 (c), it is a putter in which the cross section which penetrates the gravity center of a putter head becomes parallel to a horizontal surface. In such a case, the sole surface of the flat sole or the contact surface of the most convex point of the sole of the curved sole, or the cross section that passes through the center of gravity of the putter head is all vertical through the grip center position. It is also perpendicular to the surface.

  FIG. 2 illustrates a putter 1 according to a fourth aspect of the present invention. The center of gravity of the putter 1 is below the grip center position on the vertical line of the grip center position. This sole surface is a golf putter in which the contact surface of the sole surface or the cross section passing through the center of gravity of the putter head is parallel to the horizontal plane. Note that the case where the grip center position is the center of gravity of the putter is excluded.

The shaft 3 of the golf putter 1 of the present invention shown in FIG. 3 includes a neck 31 having a length _NL at one end and a grip 30 at the other end, and a vertical line direction on the top surface of the putter head 2 on the toe 21a side. A neck 31 protrudes upward. From the upper end of the neck 31 to the grip 30, it follows the magnitudes of the angles α and β.
In addition, this protrusion includes fixation. Further, the length N _L of the neck 31 is defined by the length from the sole of the putter head, and the longer one is good for carrying out the golf putter of the present invention. It is defined as within.
At this time, the angle α is determined to be 10 degrees or more, and the angle β is set within a range of −20 degrees to 10 degrees (positive when tilted backward with respect to the face), but −10 degrees to 10 degrees More preferably, a range of 0 to 10 degrees is desirable.

In the embodiment of FIG. 3, the center of gravity H of the putter head is arranged on the vertical line of the grip center position G, and a right-angled triangle connecting these and the hitting point 23 is formed. The right triangle is formed on the vertical plane y _1. The vertical plane y ₁ is a vertical plane along the intended line of play, and the hitting point 23 which is a sweet spot of the putter head 2 draws a trajectory on this vertical plane by the stroke at the time of putting. The hitting point of the ball can be put without shifting from the hitting point 23 (sweet spot). It is also desirable that the center of gravity of the putter be on a vertical plane along the intended line of play.

In FIG. 4, the center of gravity H of the putter head is not on the vertical line of the grip center position G unlike the case of FIG. 1, but the triangle formed by the grip center position G, the center of gravity H of the putter head, and the hitting point 23 is is formed on a vertical plane y ₁ along the play line intended penetrate these three points.
When these three points are formed on the vertical plane y _{1 in} this way, the hitting point 23 is put on the vertical plane y ₁ by drawing its trajectory as in the embodiment of FIG. make it easier.

FIG. 5 illustrates the putter 1 of the sixth invention and the seventh invention. The moment of force applied to the grip center position G, the moment of force by the shaft 3, and the moment of force by the putter head 2 are as follows. In the case of a curved sole, the contact surface of the most convex point of the sole or a planar shape is obtained by projecting (including fixing) the shaft 3 to the putter head 2 at appropriate angles α and β that can be canceled out. In the sole, the cross section passing through the center of gravity of the sole or the putter head is parallel to the horizontal plane.
Although FIG. 5 shows a case where the shaft 3 has no neck, the neck may be provided on the shaft as shown in FIG.

  The center of gravity H of the putter head, the center G of the grip G and the center of gravity S of the shaft as defined in claim 7 are located on a vertical plane passing through the intersection O and the center of gravity H of the putter head, and the center of gravity of the putter head Are projected in the order of the center of gravity of the shaft, the center of the grip, and the center of gravity of the putter head, and when the angle β = 0 °, the relationship shown in the following equation 1 is obtained to obtain the golf putter of the present invention. Can be obtained.

[Equation 1]
The horizontal distance h () from the intersection O of the center axis of the horizontal plane z ₀ and a shaft penetrating the putter head center of gravity expressed by the following. If there is a neck, the upper end of the neck is the intersection point O.
h (OG) = L _g , h (OS) = L _s , h (OH) = L _h = OH
When balancing is performed with the grip center position G as a fulcrum, the formula (1) is established as a formula for force balance.
T = Mg + mg (1)
The equation for balance of moments of force is given by equation (2) where the intersection point O is a fulcrum.
TL _g = MgL _h + mgL _s (2)
Substituting equation (1) into equation (2),
(M + m) L _g = ML _h + mL _s
The dimensions of each element of the putter are shown below.
Length to grip center position: OG = L ₀ ,
Length to the center of gravity of the shaft: OS = L ₁ ,
Length to the center of gravity of the putter head: OH = L ₂
Angle between vertical line and shaft: α ≧ 10 degrees L _g = L ₀ sin α
L _s = L ₁ sin α
(M + m) L ₀ sin α = ML _h + mL ₁ sin α
sin α {(M + m) L ₀ + mL ₁ } = ML _h
sin α = ML _h / {(M + m) L ₀ + mL ₁ } ≧ sin (10 degrees)
α = sin ⁻¹ [ML _h / {(M + m) L ₀ + mL ₁ }] ≧ 10 degrees (3)
By determining each variable so as to satisfy Expression (3), the structure of the putter of the present invention is determined.

Further, as shown in FIGS. 1 to 5, providing the shaft 3 on the upper surface on the toe 21a side of the putter head 2 is effective for easily realizing the first to seventh inventions.
Further, the projecting of the shaft 3 to the putter head 2 may be performed in a form as shown in FIGS. 6 (a) and 6 (b). In this case, the length of the neck 31 of the shaft 3 is within 127 mm from the sole.

  Further, in the golf putter sole of the present invention, when the golf putter is made to stand on a horizontal plane as shown in FIG. 7, the projection of the shaft onto the vertical plane passing through the toe and heel of the face is perpendicular to the vertical line. It is desirable to have a shape that does not change the angle α that is the angle formed by the operator.

Below, the usage method of this invention is demonstrated.
(How to use the present invention)
First of all, you will feel the weight of the putter head a few times and feel that the putter moves straight. Next, the grip is moved as far back and forth as possible with a gripping stroke (movement of the pendulum) so that the putter does not operate the putter without permission. If used in this way, the probability of failure is drastically reduced because the face surface of the putter is kept perpendicular to the target line.

  On an actual green, first, the putter according to the present invention is self-supported on the green, and it is confirmed from the rear whether the face is oriented in the intended play line direction.

  Next, move to the side of the putter, grasp the grip so that the angle α does not change, lift the putter head slightly, and while conscious of only the sense of distance, naturally stroke, the putter head left by gravity is Since the face moves straight, the face is perpendicular to the intended line of play, the ball does not deviate from the hitting point of the face, and the sole surface is parallel to the horizontal plane at the time of impact. There is no side spin on the ball even with a putter.

It is explanatory drawing of the putter for golf which concerns on this invention, (a) is a front view of the putter of 1st invention, (b) is a front view of the putter of 1st invention, (c) is the putter of 2nd invention. (D) is a figure explaining the contact surface of a curved-shaped sole. It is explanatory drawing of the putter for golf which concerns on this invention, and is a front view of the putter of 3rd invention. It is an external appearance perspective explanatory view of one example of a putter concerning the 4th invention. It is an external appearance perspective explanatory view of other examples of a putter concerning the 4th invention. It is explanatory drawing of the putter which concerns on 5th invention, 6, (a) is a front view, (b), (c) is the figure seen from the z direction, (c) is a case where the angle β is 0 degree, (D) is a schematic diagram for analysis. It is a figure which shows the protrusion form of the shaft to a putter head, (a) is a heel side upper surface, (b) is a schematic diagram of a center part upper surface. It is explanatory drawing of the sole shape of a putter head. It is explanatory drawing of the putter of the conventional face balance structure, (a) is an external appearance perspective view, (b) is a side view. It is an external perspective view of a perfect face balance type ideal putter.

Explanation of symbols

1, 11, 12 Putter 2 Putter head 3 Shaft 20 Face 21a Toe 21b Heel 22 Sole 22a Maximum convex point 22b Contact surface 23 at the maximum convex point Impact point (sweet spot)
30 Grip 31 Neck α α is the angle (degree) relative to the vertical line of the projection of the shaft onto the vertical plane that penetrates the toe and heel of the face
β Angle (in degrees) of the projection of the shaft onto the vertical plane along the intended line of play relative to the vertical line
P Center of gravity of putter H Center of gravity of putter head S Center of gravity of shaft G Center position of grip

Claims (10)

A golf putter,
A putter head having a face for hitting a ball on the front surface and a curved or flat sole on the bottom surface;
A shaft having a grip at one end,
In the state where the putter is suspended from the center position when the grip is gripped by combining left and right hands, the projection of the shaft onto the vertical plane passing through the toe and heel of the face is perpendicular to the vertical line. The other end of the putter head is projected so that the curved surface sole is in contact with the most convex point of the sole or the flat sole is parallel to the horizontal plane. A golf putter characterized by having A golf putter,
A putter head having a face for hitting a ball on the front surface and a curved or flat sole on the bottom surface;
A shaft having a grip at one end,
In the state where the putter is suspended with the center position when the grip is gripped by combining left and right hands as a fulcrum, the shaft is placed on the putter head so that the cross section passing through the center of gravity of the putter head is parallel to the horizontal plane. A golf putter characterized in that the other end protrudes.   3. When the golf putter is self-supporting on a horizontal plane, an angle formed by projection of the shaft with respect to a vertical plane through a toe and a heel of the face does not change. The golf putter described in 1.   4. The golf putter according to claim 1, wherein a center of gravity of the golf putter is positioned on a vertical line of a center position when the grip is gripped by combining left and right hands. 5. .   The center position when the grip is gripped by combining left and right hands, the center of gravity of the putter head, and the hitting point of the ball on the face surface are the same vertical plane along the intended line of play. The golf putter according to claim 1, wherein the golf putter is located above.   In the state where the putter is suspended with the center position when the grip is gripped by combining left and right hands as a fulcrum, the moment of force applied to the center position when the grip is gripped by combining left and right hands, and the shaft 4. The golf according to claim 1, wherein the shaft protrudes from the putter head so that a moment of force caused by the force and a moment of force caused by the putter head are canceled out. 5. For putter. The center of gravity of the putter head, the center position when the grip is held by combining left and right hands, and the center of gravity of the shaft,
The projection on the horizontal plane that passes through the center of gravity of the putter head and that passes through the center of gravity of the putter head is the center of gravity of the shaft, the center position when the grip is held in combination with left and right hands, 7. The golf club according to claim 6, wherein the center of gravity of the putter head, or the center of gravity of the putter head, the center position when the grip is gripped by combining left and right hands, and the center of gravity of the shaft are arranged in this order. putter. The golf putter according to any one of claims 1 to 7, wherein the shaft projects from a toe-side upper surface of the putter head.
  8. The shaft according to claim 1, wherein the shaft protrudes from an upper surface of a center portion or an upper surface of a heel side of the putter head and is bent in a toe side direction to a height within 127 mm from the sole. The golf putter according to item 1.   The sole has a shape that does not change an angle formed by projection of the shaft on a vertical plane passing through a toe and a heel of the face when the golf putter is self-supporting on a horizontal plane. The golf putter according to any one of claims 1 to 9.

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