JP2005118251A - Golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance the carry of a ball and to mitigate the impact at the time of impacting. <P>SOLUTION: A connecting portion R of a shaft 10 and a head body 40 is arranged at a position rear from the center of gravity G. When the portion farthest from a distal end 20a of a grip 20 of the head body 40 is the farthest portion 40a, the connecting portion R is set near the position farthest from the farthest portion 40a of the head body 40. The carry of the ball can be enhanced and slice can be prevented, because the posture of the club-head 30 is stabilized at the time of back-swing and downswing, just meet becomes possible at the time of impact even in the case of bending of shaft 10, and further the shaft 10 acts so as to push out the ball through the club-head 30 at the time of the impact by the above connecting portion R. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a golf club.

  Recently, wood-type golf clubs (see, for example, Patent Document 1) have been designed to increase the capacity and lower the center of gravity of a club head mainly for the purpose of improving the flight distance of golf balls and stabilizing the direction.

  FIG. 16 shows an example of a golf club.

  As shown in the figure, a club head 102 having a head body 100 and a hosel 101, a shaft 103 connected to the hosel 101, and a grip (not shown) provided at the tip of the shaft 103 are provided.

The club head 102 is provided with a face 104 having a sweet spot S on the front surface thereof, and the connecting portion R between the head body 100 and the shaft 103 is set in the vicinity of the face 104 in the front-rear direction. ing. That is, assuming that the center of gravity of the club head 102 is G, the connecting portion R described above is set on the face 104 side (front side) with respect to the center of gravity G.
Japanese Patent Laid-Open No. 2003-210620

  However, according to the above-described golf club, the posture of the club head 102 may become unstable when the club head 102 is positioned behind the player during back swing and down swing operations. That is, since the connecting portion R between the head main body 100 and the shaft 103 is located in front of the center of gravity G, during the back swing or down swing operation, for example, when the shaft 103 is parallel to the ground, the connecting portion Since the center of gravity G tends to be positioned below R and the face 104 tends to be positioned above the connecting portion R, the posture of the club head 102 becomes unstable during a downswing operation or at the time of impact. There was a problem (first problem) that the ball was not hit correctly.

  In addition, since the shaft 103 is bent during the downswing, the actual impact timing tends to be slightly delayed from the timing assumed by the player, so it is difficult to just meet at the time of the impact, and therefore no force is applied at the time of the impact. There was also a problem (second problem).

  Further, there is a problem (third problem) that the face 14 faces rightward and is easily sliced due to a reaction from the ball at the time of impact.

  Furthermore, since the connecting portion R of the shaft 103 is close to the face 104 and hence the sweet spot S, the impact at the time of impact is likely to be transmitted to the player through the connecting portion R, the shaft 103, and the grip (fourth problem). was there.

  The first to fourth problems as described above are not limited to wood but are also common to irons, to some extent.

  Therefore, the present invention solves the above-mentioned problems (first to fourth problems) by setting the connecting portion between the head main body and the shaft behind the center of gravity, so that the posture of the club head at the time of impact can be changed. An object of the present invention is to provide an epoch-making golf club which is stabilized and can easily be just met, further prevents slicing, and further reduces the impact at the time of impact.

The invention according to claim 1 is a golf club comprising a rod-shaped shaft, a grip provided at one end of the shaft, and a club head connected to the other end of the shaft.
The club head has at least a head main body. With respect to the positional relationship between the connecting portion between the head main body and the shaft, the center of gravity of the club head, and the face of the club head, the connecting portion is arranged at the rear of the face. Set to be located further back than the center of gravity located in the
It is characterized by that.

According to a second aspect of the present invention, in the golf club according to the first aspect, in the state where the shaft is horizontally and rotatably held and the center of gravity is located immediately below the shaft or its extension, the face is Setting the position of the connecting portion so as to be located below the center of gravity;
It is characterized by that.

According to a third aspect of the present invention, in the golf club according to the first or second aspect, when the portion of the head body that is farthest from the tip of the grip is the farthest portion, the connecting portion is the head. Set near the position farthest from the farthest part of the main body,
It is characterized by that.

According to a fourth aspect of the present invention, in the golf club according to the first or second aspect, the one of the two planes perpendicular to the axis of the shaft and in contact with the outer peripheral surface of the head body that is farther from the tip of the grip When the point where the flat surface of the head and the outer peripheral surface of the head body contact is an approximate farthest point, the connecting portion is set near the position farthest from the approximate farthest point of the head body.
It is characterized by that.

According to a fifth aspect of the present invention, in the golf club according to any one of the first to fourth aspects, a recess is provided in a portion of the outer peripheral surface of the head body that is located immediately before the connecting portion.
It is characterized by that.

According to a sixth aspect of the present invention, in the golf club according to any one of the first to fifth aspects, the club head includes the head main body and a connecting portion that projects from the head main body and connects to the shaft. A hosel, and the connecting portion is set in the vicinity of a neck that becomes a boundary between the head body and the hosel.
It is characterized by that.

  According to the first aspect of the present invention, the connecting portion between the head main body and the shaft is set so as to be located further rearward than the center of gravity located behind the face. On the track, the connecting part precedes, followed by the center of gravity and the face. That is, since the club head moves so as to be pulled up by the shaft while the center of gravity is located below the connecting portion, the posture of the club head is stabilized. At the time of downswing, the posture where the center of gravity is located below the connecting part and the head is located below the connecting part, that is, the face precedes on the track, and then moves in the posture where the center of gravity and connecting part continue. Transition to impact with a stable posture. Therefore, the face hits the ball accurately, the flight distance is improved, and the direction of the hit ball is stabilized.

  In addition, since the connecting portion is set behind the center of gravity, it is possible to perform just-meeting at the time of impact in consideration of the effect of the shaft being bent during downswing. Therefore, power can be effectively transmitted to the ball at the time of impact.

  Further, in the prior art, when the reaction from the ball is applied to the club head at the time of impact, since the club head is pulled by the shaft, the slicing is easily applied. In the invention, since the connecting portion is set behind the center of gravity, the operation of pushing the ball through the club head by the shaft at the time of impact is performed. In addition to applying a large force, it also prevents slicing.

  Furthermore, since the connecting portion of the shaft is set at a position farther from the sweet spot on the face than before, the impact at the moment when the face hits the ball is alleviated and transmitted to the player. The

  The invention of claim 2 specifically defines the state in which the connecting portion is located further rearward than the center of gravity of the above-described claim 1, in other words, the state in which the face, the center of gravity, and the connecting portion are set in order from the front side. To do. By setting the position of the connecting portion in this way, the operation / effect of the first embodiment described above can be achieved. That is, the posture of the club head at the time of impact can be stabilized, just meat can be easily made, slicing can be prevented, and the impact at the time of impact can be reduced.

  The invention of claim 3 further defines the position of the connecting portion, and makes it near the position farthest from the farthest portion. According to this claim, since the connecting portion is set at a position farthest from the farthest portion where the centrifugal force acts most in the head main body, a large centrifugal force acts on the club head, The distance of the ball will increase accordingly.

  The invention of claim 4 further defines the position of the connecting portion by a method different from that of claim 3, and is set as the vicinity of the farthest position from the approximate farthest point. According to the present claim, substantially the same operation and effect as the above-described third aspect can be achieved. That is, a large centrifugal force acts on the club head, and the flying distance of the ball increases accordingly. In addition, when the length of the shaft is sufficiently longer than the length of the club head in the front-rear direction, the farthest part defined in claim 3 and the nearest farthest point defined in claim 4 Accordingly, the positions of the connecting portions are substantially the same.

  According to the fifth aspect of the present invention, the concave portion is provided in the portion located immediately before the connecting portion, so that the shaft acts to boost the concave portion at the time of impact. Therefore, since the force that opposes the force that causes the face that causes the slice to face right acts along the surface of the recess, the slice can be prevented or reduced.

  According to the invention of claim 6, the connecting portion between the shaft and the head main body is provided in the vicinity of the base end portion of the hosel, that is, in the vicinity of the neck.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, what attached | subjected the same code | symbol in each drawing has the same structure or effect | action, The duplication description about these was abbreviate | omitted suitably.
<Embodiment 1>

  1 to 7 show an example in which the golf club 1 according to Embodiment 1, that is, the present invention is applied to wood, as an example of a golf club according to the present invention. FIG. 1 is a perspective view of the golf club 1 as viewed from the front upper right, FIG. 2 is a top view, FIG. 3 is a bottom view, FIG. 4 is a front view, and FIG. 5 is a rear view (rear view). 6 is a right side view (side view seen from the player side), and FIG. 7 is a left side view. However, in FIG. 1, FIG. 3 to FIG. 6, the grip side portion and the grip of the shaft are omitted.

  As shown in these drawings, the golf club 1 includes a rod-shaped shaft 10, a grip 20 provided at a base end portion (one end portion: an end portion on the player side) of the shaft 10, and a tip end portion of the shaft 10. And a club head 30 connected to (the other end).

  Of these, the shaft 10 is made of steel or carbon. The shaft 10 is called a hand tone, a tip tone, or a medium tone (torso tone) depending on the difference in the position of the kick point that represents the apex when the shaft 10 is bent. In general, when the kick point is close to the grip 20, the tone is close to the hand, when the kick point is close to the club head 30, the tone is in the middle, and the middle tone is between these. In general, it is said that the ball with higher tone is easier to rise, and the lower the ball, the lower the trajectory.

  The grip 20 is a grip portion of the golf club 1 and is generally a rubber rubber grip.

  The club head 30 is made of, for example, a hollow metal. The front side of the club head 30 is a face 31 that serves as a ball striking surface. Also, the back 32 is called the back 32, the top is the crown 33, the bottom is the sole 34, the left side (the side far from the player) is the toe 35, and the right side (the side near the player) is called the heel 36. It is. Further, a neck 37 is formed on the upper side of the heel 36, and a hosel 38 projects from the neck 37 obliquely upward. The hosel 38 serves as a connection portion to which the shaft 10 is connected. A socket 39 is mounted between the hosel 38 and the shaft 10. In the following description, for convenience, the portion of the club head 30 excluding the hosel 38 is referred to as a head body 40. That is, the club head 30 will be described as being divided into a head main body 40 and a hosel 38 with the neck 37 as a boundary.

  You may make it fill the hollow part of the above-mentioned club head 30 with fillers, such as a polyurethane. Further, the face 31 is formed with a plurality of horizontal score lines (not shown).

  The center of gravity G of the club head 30 is shown in FIGS. As shown in FIG. 7, a point where the perpendicular line drawn from the center of gravity G to the face 31 and the face 31 intersect is a so-called sweet spot S.

  As shown in FIG. 2, in the present embodiment, the connecting portion R between the shaft 10 and the head main body 40 is set to be located further rearward than the center of gravity G located behind the face 31. That is, the position of the connecting portion R is set so that the face 31, the center of gravity G, and the connecting portion R are arranged in order from the front side (face 31 side). In other words, in a state where the shaft 10 is held horizontally and rotatably and the center of gravity G is located immediately below the shaft 10 or its extension, the position of the connecting portion R is set so that the face 31 is located below the center of gravity G. Set. Further, when the portion of the head body 40 farthest from the tip 20a (see FIG. 2) of the grip 20 is the farthest portion 40a (see FIGS. 2 to 5 and 7), the connecting portion R is connected to the head body. 40 is set in the vicinity of the farthest position (R0: not shown) from the farthest portion 40a. Although it is ideal to set the connecting portion R at the position R0, since the actual head body 40 has a complicated shape, it is difficult to strictly determine the farthest portion 40a and the position R0. There are cases. In such a case, the connecting portion R assumes a line segment connecting the position assumed to be the most distant part 40a and the position assumed to be the position R0 substantially, and also assumes a plane orthogonal to the line segment. . And when this plane is located at 1/4 of the length of the line segment on the position R0 side, when the connecting portion R is set to be positioned on the position R0 side from this plane, The effects of the present invention can be sufficiently exhibited.

  Further, in the present embodiment, as shown in FIGS. 1 to 3 and 6, a recess 41 is provided in a portion of the outer peripheral surface of the head main body 40 that is located immediately before the connecting portion R. However, in the present embodiment, since the connecting portion R is surrounded by the hosel 38, the recess 41 is provided immediately before the neck 37 that is a portion corresponding to the connecting portion R. Specifically, the recess 41 is formed in the heel 36 so as to be long in the vertical direction so as to be continuous with the neck 37 on the front side of the hosel 38. The recess 41 is formed in a groove shape having a substantially arc-shaped cross section in the horizontal direction, and an upper end 41a thereof is positioned substantially at the crown 33, and a lower end 41b of the recess 41 is gradually reduced in depth while the groove depth is gradually reduced. 34 is extended to the vicinity. The position of the lower end 41b of the groove of the concave portion 41 substantially coincides with the lower end 10b of the shaft 10 described above. By providing such a recess 41, the club head 30 can turn the face 31 to the left at the time of impact without incurring a decrease in strength. it can.

  The golf club 1 having the above-described configuration can stabilize the posture of the club head 30 during backswing and downswing by setting the connecting portion R behind the center of gravity. That is, at the time of backswing, as schematically shown in FIG. 8, the club head 30 draws a substantially circular orbit in the direction of the arrow K1, but at this time, the connecting portion R precedes, and thereafter the center of gravity G, The face 31 continues. Since the club head 30 moves so as to be pulled up by the shaft 10 in a state where the center of gravity G is positioned below the connecting portion R in this way, the posture of the club head 30 can be stabilized. On the other hand, at the time of the downswing, as schematically shown in FIG. 9, the club head 30 draws a substantially circular orbit in the direction of the arrow K2. At this time, the center of gravity G is located below the connecting portion R. Further, the posture in which the face 31 is positioned below, that is, the face 31 precedes on the track, and thereafter moves in a posture in which the center of gravity G and the connecting portion R continue, so that the transition is made to the impact in a stable posture. Therefore, the face 31 accurately hits the ball B, the flight distance of the ball B is improved, and the direction of the hit ball is stabilized. As a result, the first conventional problem that the face posture is unstable and the face does not hit the ball correctly can be solved.

  Conventionally, the impact timing has tended to be delayed from the timing imagined by the player due to the shaft 10 being bent during the downswing, but in this embodiment, the connecting portion R is more than the center of gravity G. Is also set to the rear, so impact can be made at the timing of the player's image. Therefore, it is possible to put the ball on the player with sufficient power at the time of impact.

  Further, in the past, when the reaction from the ball was applied to the club head 30 at the time of impact, the operation was such that the club head 30 was pulled by the shaft 10, so that slicing was easy to take. In the embodiment, since the connecting portion R is set behind the center of gravity G, an operation of pushing the ball through the club head 30 by the shaft 10 at the time of impact is performed. However, it is possible to apply a large force to the ball and to prevent slicing.

  This slicing prevention effect is further effective by providing the recess 41 of the club head 30 as described above. That is, it acts so that the shaft 10 boosts the concave portion 41 at the time of impact. Accordingly, a force that opposes the force that causes the face 31 that causes slicing to face right acts along the surface of the concave portion, so that slicing can be prevented or reduced.

  Furthermore, since the connecting portion R of the shaft 10 is set at a position farther from the sweet spot S on the face 31 than in the conventional case, the impact at the moment when the face 31 hits the ball is alleviated. Is transmitted to the player.

In addition to the above-described effects, the head body 40 is connected to the shaft 10 by connecting the connection portion R to the position farthest from the farthest portion 40a where the centrifugal force is maximum. It becomes easy to bend as a standard. Since this bend attempts to return at the time of impact as indicated by an arrow K3 in FIG. 9, the flying distance of the ball B is increased, and the impact transmitted to the player at the time of impact can be reduced.
<Embodiment 2>

  In the present embodiment, instead of the farthest portion 40a of the first embodiment, an approximate farthest point 40b is obtained, and the position of the connecting portion R is set in the vicinity of the position farthest from the approximate farthest point 40b. I did it.

  That is, as shown in FIG. 10, a plane H far from the tip 20a (see FIG. 2) of the grip 20 out of two planes orthogonal to the axis 10a of the shaft 10 and in contact with the outer peripheral surface of the head body 40. A point where the outer peripheral surface of the head main body 40 is in contact is defined as an approximate farthest point 40b. Then, the connecting portion R is set near the position farthest from the approximate farthest point 40b in the head body 40.

  Also in the present embodiment, the point that the connecting portion R is set behind the center of gravity G and the point that the concave portion 41 is provided immediately before the connecting portion R are the same as in the first embodiment.

  Also in the second embodiment, it is possible to achieve substantially the same operations and effects as in the first embodiment. In other words, the posture of the club head 30 at the time of impact can be stabilized, just meat can be easily made, slicing can be prevented, and the impact at the time of impact can be reduced.

In the first and second embodiments described above, the club head 30 has the hosel 38, and the hosel 38 serves as a connecting portion between the shaft 10 and the club head 30. The invention can be similarly applied to a club head that does not have the hosel 38. That is, as shown in FIG. 11, when there is no hosel, the entire club head 30A is the same as the club body, and therefore, the shaft 10 is directly connected to the club head 30A, so that the connecting portion R is Will be exposed. Even in such a case, as in the first and second embodiments, the connecting portion R is set behind the center of gravity G, the connecting portion R is set as the farthest portion or the approximate farthest point, and further connected. By providing the concave portion 41 immediately before the portion R, it is possible to achieve the same operations and effects as in the first and second embodiments.
<Embodiment 3>

  In the present embodiment, the golf club according to the present invention is applied to an iron.

  12 to 15 show an iron club head 50. 12 is a perspective view of the club head 50 as viewed from the upper right on the back side, FIG. 13 is a top view, FIG. 14 is a rear view (rear view), and FIG. 15 is a left side view (side view far from the player). It is. In these drawings, reference numeral 58 is a neck, reference numeral 58 is a hosel, reference numeral 60 is a head body, reference numeral 61 is a face, reference numeral 62 is a back, reference numeral 63 is a crown, reference numeral 64 is a sole, reference numeral 65 is a toe, reference numeral 66 is The heel and reference numeral 67 indicate the recesses, respectively.

The club head 50 according to the present embodiment is basically the one in which the back 32 of the club head 30 according to the first embodiment described above is notched and the recess 67 is provided. The same as in the first embodiment. Therefore, also in the present embodiment, the same effect as in the first embodiment can be obtained.
In the present embodiment, it is needless to say that the recess 41 may be provided as in the first embodiment.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a golf club according to a first embodiment when viewed from the front upper right. 1 is a top view of a club head of a golf club in Embodiment 1. FIG. FIG. 3 is a bottom view of the club head of the golf club in the first embodiment. 1 is a front view of a club head of a golf club in Embodiment 1. FIG. FIG. 3 is a rear view of the club head of the golf club in the first embodiment. FIG. 3 is a right side view of the club head of the golf club in the first embodiment. FIG. 3 is a left side view of the club head of the golf club in the first embodiment. FIG. 3 is a diagram for explaining an operation during back swing of the golf club in the first embodiment. It is a figure explaining the operation | movement at the time of a downswing of the golf club in Embodiment 1. FIG. FIG. 6 is a diagram illustrating a golf club in a second embodiment. It is a right view which shows the example which applied this invention to the club head without a hosel. FIG. 10 is a perspective view of a club head according to Embodiment 3 as viewed from the upper right on the back side. FIG. 6 is a top view of a club head in a third embodiment. FIG. 10 is a rear view of the club head in the third embodiment. FIG. 10 is a left side view of the club head in the third embodiment. It is a left view of the club head of the conventional golf club.

Explanation of symbols

1 Golf Club 10 Shaft 10a Shaft Center 20 Grip 20a Grip Tip 30, 30A, 50
Club head 31, 61 Face 32, 62 Back 33, 63 Crown 34, 64 Sole 35, 65 Toe 36, 66 Heel 37 Neck 38 Hosel 40 Head body 41 Recess G Center of gravity H Shaft axis is orthogonal to shaft axis and outer circumference of head body Plane R connecting part S Sweet spot

Claims (6)

In a golf club comprising a rod-shaped shaft, a grip provided at one end of the shaft, and a club head connected to the other end of the shaft,
The club head has at least a head main body. With respect to the positional relationship between the connecting portion between the head main body and the shaft, the center of gravity of the club head, and the face of the club head, the connecting portion is arranged at the rear of the face. Set to be located further back than the center of gravity located in the
A golf club characterized by that. In the state where the shaft is held horizontally and rotatably and the center of gravity is located immediately below the shaft or its extension, the position of the connecting portion is set so that the face is located below the center of gravity.
The golf club according to claim 1. Of the head body, when the portion farthest from the tip of the grip is the farthest portion, the connecting portion is set near the position farthest from the farthest portion of the head body,
The golf club according to claim 1 or 2, wherein Of the two planes orthogonal to the shaft axis and in contact with the outer peripheral surface of the head main body, the point where the plane far from the tip of the grip and the outer peripheral surface of the head main body contact is the approximate farthest point. When the connection portion is set near the farthest position from the approximate farthest point of the head body,
The golf club according to claim 1 or 2, wherein Of the outer peripheral surface of the head body, a recess is provided in a portion located immediately before the connecting portion.
The golf club according to any one of claims 1 to 4, wherein the golf club is provided. The club head has the head main body and a hosel that protrudes from the head main body and serves as a connection portion with the shaft, and the coupling portion is provided in the vicinity of the neck serving as a boundary between the head main body and the hosel. Set to
The golf club according to any one of claims 1 to 5, wherein the golf club is provided.

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