JPH066180B2 - Golf club head - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a golf club head.

[Prior Art] Conventionally, golf club heads, particularly wood heads, as shown in FIG. 8 and FIG. 10 have been known. That is, as shown in FIG. 8, the crown portion 11 is formed above the ridge line 5 formed by the face surface portion 2 of the head body 1 , the head peripheral side upright portion 3 and the head upper surface portion 4. The shaped golf club head 1 is generally used.

However, in the golf club head having such a configuration,
As shown in FIG. 9, it is well known that the sweet spot SS and the meet point MP are designed not to match.

Here, the sweet spot SS is a position on the face surface of a line drawn through the center of gravity G of the head so as to intersect perpendicularly to the face surface portion of the head, and the meet point MP is the face of the head. It is a position at which the ball is hit on the face portion and substantially coincides with the geometric center of the face portion.

Thus, the fact that the sweet spot SS and the meat point MP do not match means that the center of gravity B of the ball is B.
That is, the center of gravity G of the head is not located on the line connecting G and the meat point MP.

In particular, like the golf club head shown in FIG. 9, a head in which the meet point MP is located below the sweet spot SS is generally used.

In such a head, since the center of gravity G of the head is located too high, a rotational moment acts around the center of gravity G of the head at the time of hitting, so that the head rotates counterclockwise. A clockwise rotation is added to the ball, which causes so-called backspin.

Further, since the head has a loft angle, backspin commensurate with the loft angle is inevitably generated. Therefore, since the backspin amount corresponding to the loft angle is added to the above-described backspin, the backspin amount is substantially increased and the flight distance of the ball is reduced.

Furthermore, in these conventional heads, that is, in the head where the sweet spot SS is higher than the meet point MP, as shown in FIG. 12 (when viewed from the toe side of the injection head), the head is hit. Rotates in the clockwise direction around the center of gravity G, so that the face surface of the head faces downward, and the ball launch angle decreases. In addition, this is because the center of gravity G of the head is located too high in the above-mentioned description, so that a rotational moment acts around the center of gravity G of the head at the time of hitting the head, Rotates counterclockwise, while clockwise rotation is added to the ball, causing so-called backspin. , ", Which is inconsistent with the statement" ... ", but it is specified here that the above statements are based on the assumption that they are viewed from the heel side of the head. Thus, in the conventional head, for the above-mentioned reason,
The backspin amount increases.

Further, in these conventional heads, the flight curve of the ball after hitting is as shown in FIG. 13 due to the above operation. That is, the ball flies low after hitting, but because the backspin amount is large, the ball blows up and soars high, but because the backspin amount is large, the stall is large and the flight curve falls almost vertically from the maximum reaching point and falls. Therefore, the run of the ball is reduced and the total flight distance of the ball is reduced.

Therefore, as shown in FIG.
As disclosed head No. 74, the head ridge 5 formed by the head circumference side erected surface portion 3 and the head top portion 4 comprising a face surface portion 2 of the head body 1, the head main body 1
A golf club head 1 which is positioned below a substantially central portion 15 in the vertical thickness direction is also known.

In the head having such a shape, as shown in FIG. 11, the center of gravity G of the head is located below, and the center of gravity G of the head is on the line connecting the center of gravity G of the head and the sweet spot SS. Since the meat point MP is located, the energy loss at the time of hitting is reduced,
It has been already known that the ball has a good resilience characteristic.

However, even such a golf club head has the following problems.

That is, as described above, the center of gravity G of the head and the center of gravity BG of the ball and the meat point MP are located on the line facing the sweet spot SS, so that the energy loss at the time of hitting the ball is reduced and However, even with such a head, the backspin amount corresponding to the loft angle is applied, and thus the flight distance of the ball cannot always be said to be good.

Therefore, the form of the conventional golf club head (that is,
A head having a large crown portion on the upper surface of the head above the ridgeline formed on the head body. ), The one in which the meat point MP is located above the sweet spot SS is also known in Japanese Utility Model Publication No. 55-65059.

However, in the head based on such a conventional shape, the center of gravity G of the head is located considerably rearward of the face surface portion and higher than the sole portion, so that the position of the meat point MP and the sweet spot SS is extremely high. Since the meat point MP and the sweet spot SS may actually substantially coincide with each other because they are too close to each other, as in the case where the meat point MP and the sweet spot SS coincide with each other. It had a problem that the flight distance of the ball was not improved so much.

Further, since the center of gravity G of the head is away from the face surface portion and behind, there is a problem that the ball fly-out angle is reduced when the ball is hit, and it is difficult to increase the ball flight distance.

[Problems to be Solved by the Invention] In view of these drawbacks of conventional golf club heads, the present invention has a unique head shape that has never existed, and the sweet spot SS is slightly separated below the meet point MP. And the position of the center of gravity G of the head closer to the face surface portion side and the sole surface portion side, the backspin amount is further reduced, the flight distance of the ball is increased, and the air of the head during the swing is increased. The purpose of the present invention is to provide a golf club head in which the resistance is reduced and the swing speed of the head is further improved.

[Means for Solving Problems] An embodiment of the present invention will be described with reference to the drawings.
As shown in FIGS. 2 and 2, the head main body 1 is composed of a head peripheral side elevation portion 3 including a face 2 surface portion and a head upper surface portion 4 so that the cheat spot is located lower than the meet point. The head ridge line 5 to be formed is formed substantially at the uppermost portion of the head body 1 in the vertical thickness direction, and the weight portion 1 is arranged at a position close to the sole surface portion 6 or the face surface portion 2 of the head. It is the golf club head 1 .

[Operation] As described above, in the golf club head 1 of the present invention, the head ridge line 5 formed of the head peripheral side upright portion 3 including the face surface portion 2 and the head upper surface portion 4 of the head main body 1 is formed. Since the weight portion is formed substantially at the uppermost portion in the vertical thickness direction and the weight portion is arranged at a position close to the sole surface portion or the face surface portion of the head, the position of the center of gravity G of the head is set closer to the face surface portion side and the sole surface portion. Since it can be brought closer to the side, the sweet spot SS is arranged below the meet point MP to some extent.

Due to such a configuration, unlike the case of the head having the conventional shape, a rotational moment acts around the center of gravity G of the head at the time of hitting, the head rotates clockwise, and the ball moves counterclockwise. Around rotation is added, so-called overspin occurs.

Further, since the head has a loft angle, backspin commensurate with the loft angle is inevitably generated.

Therefore, the amount of backspin commensurate with the loft angle is added to the above-mentioned overspin, but due to the offsetting effect of both, the amount of backspin is substantially reduced, and the phenomenon that the flight distance of the ball is significantly improved occurs. Is.

Further, in the golf club head of the present invention, namely,
At the head where the sweet spot SS is lower than the meet point MP, as shown in FIG. 13 (note: when viewed from the toe side of the head),
Since the bed rotates in the counterclockwise direction around the center of gravity G, the face surface of the head is directed upward, so that the ball jumps out at a high angle. In addition, this is because the rotational moment acts around the center of gravity G of the head at the time of hitting, which is different from the case of the head having the conventional shape because of the above-mentioned description. Rotation occurs, while counterclockwise rotation is added to the ball, which causes so-called overspin. Although it is inconsistent with the above description, it is specified here that these above descriptions are expressed assuming that they are viewed from the heel side of the head.

As described above, in the head of the present invention, the backspin amount is reduced due to the above reason.

Further, in these heads of the present invention, the flight curve of the ball after being hit is as shown in FIG. That is, after the ball is hit, the ball jumps out high, and since the backspin amount is small, the ball flies without blowing up, and falls on the ground at an acute angle. Therefore, the number of runs increases and the total flight distance of the ball increases.

Further, in the golf club head of the present invention, as described above, the head ridge line 5 formed by the head peripheral side upright portion 3 including the face surface portion 2 and the head upper surface portion 4 has a vertical thickness of the head main body 1 . Since the crown portion 11 which is usually formed on the upper surface of the head is not formed or is formed only to be formed slightly at the uppermost portion in the vertical direction, it is formed in the substantially central portion of the head. The sectional shape of the portion becomes triangular, and it becomes possible to significantly reduce the air resistance during the swing.

[Embodiment] As another embodiment of the present invention, as described above, in order to bring the center of gravity G of the head closer to the face surface portion side and the sole surface portion side, as shown in FIG. 2 and FIG. In order to maintain the shape of the head and add weight equivalent to that of the conventional crown portion, the sole plate is formed so that the face surface side 2 becomes thicker than the back side 7 in order to form the weight part 10. It is also possible to provide a head configured as the weight portion 10 on the back side close to the face surface side.

As another embodiment, as shown in FIG. 4, a head ridge line 5 composed of a head peripheral side upright portion 3 including a face surface portion 2 and a head upper surface portion 4 is formed in a vertical thickness direction of the head main body 1. The same effect can be obtained even with a head having a form in which it is formed almost at the uppermost portion and a very small crown portion 11 is formed on the head upper surface portion 4 above the head ridge line 5 .

As another embodiment, as shown in FIG. 5, the head shape of the present invention is maintained as described above, the entire upper surface 4 of the head is formed as a concave surface 13, and the weight portion 10 has a thickness of the sole plate. Is a head for a golf club in which the face portion side is thicker than the back portion. With such a head shape, the air resistance value of the bed itself can be further reduced, and the center of gravity of the head can be made closer to the face surface side and the sole surface side.

As another embodiment, as shown in FIG. 6, the head ridgeline 5 is formed substantially at the uppermost portion of the head body 1 in the vertical thickness direction, and the head body 12 extends from the top edge portion 12 to the back portion 7 of the head. It is also possible to supply a golf club head having a shape in which the thickness of the golf club is rapidly reduced.

In yet another embodiment, as shown in FIG. 7, to maintain a head shape of the present invention as mentioned above, and from the top edge portion 12 of the head 1 of the head main body 1 at a substantially central portion of toward the back side 7 It is also possible to supply the golf club head 1 whose thickness changes abruptly.

By increasing the weight distribution on the face surface side as in the head shown in FIGS. 6 and 7, the position of the center of gravity of the head can be brought closer to the face surface side and the sole surface side, and the meat point The sweet spots will be arranged at some distance below.

The head according to the present invention includes wood, metal, F
A golf club head made of RP or plastic can be used as appropriate.

[Advantages of the Invention] As described above, in the present invention, unlike the conventional golf club head, the head ridge line formed by the head peripheral side upright portion including the face surface portion and the head upper surface portion is provided above and below the head body. By forming the sole plate approximately at the top in the thickness direction and by distributing the weight by making the thickness of the sole plate thicker on the face surface side than on the back surface side, the position of the center of gravity G of the head can be set closer to the face surface side and the sole side. Since the sweet spot SS is positioned below the meet point MP to some extent because it can be brought closer, a rotational moment acts around the center of gravity G of the head at the time of hitting, and the head rotates clockwise. On the other hand, counterclockwise rotation is added to the ball, which causes so-called overspin.

Further, since the head has a loft angle, backspin commensurate with the loft angle is inevitably generated.

Therefore, the amount of backspin commensurate with the loft angle is added to the above-mentioned overspin, but the effect of canceling them out is that the amount of backspin is substantially reduced and the flight distance of the ball is significantly improved. Is. (Experimental data according to the present invention is shown in Table-1 and Table-2.) Further, the golf club head of the present invention has a unique shape, unlike the conventional golf club head,
Since the air resistance value of the head at the time of swing is reduced, the head speed at the time of swing is remarkably improved, and the effect of increasing the flight distance of the ball is produced.
In the golf club head of the present invention, as described above, the center of gravity G of the head is located on the side of the face surface and on the side of the sole surface, so that the launch angle of the ball hit becomes large, and the ball jumps high. become,
Further, it has an effect of increasing the flight distance of the ball.

As described above, the golf club head according to the present invention has the effect of increasing the flight distance of the ball because the head speed is improved during the swing even when used by beginners and weak golfers as well as advanced players. Is played.

[Brief description of drawings]

FIG. 1 is a side view showing a golf club head according to the present invention. FIG. 2 is a sectional view of an essential part of the golf club head according to the present invention. 3 to 7 are side views showing other embodiments of the golf club head according to the present invention. FIG. 8 and FIG. 10 are side views showing a conventional golf club head. 9 and 11 are cross-sectional views of a main part of a conventional golf club head. FIG. 12 is a schematic view showing the movement of a conventional golf club head when hitting a ball. FIG. 13 is a schematic view showing the movement of the head when hitting the golf club head according to the present invention. FIG. 14 is a flight curve diagram showing flight curves of the golf club head of the present invention and the conventional golf club head. 1 : Head body. 2: Face surface part. 3: Elevated portion on the circumferential side of the head. 4: Head upper surface part. 5 : Head ridge. 6: Sole surface part. 7: Back side. 8: Sole plate. 10: Weight section. 11: Crown part. 12 Top edge part. 1
3: Concave part. 14: Ball. 15: central part of head G:
Center of gravity of the head. BG: The center of gravity of the ball. SS: Sweet spot. MP: Meat points.

Claims (5)

[Claims] 1. In a head body, a head ridge line constituted by a head peripheral side upright portion including a face surface portion and a head upper surface portion is provided so that a sweet spot of the head is positioned lower than a meet point. When the weight portion is formed at the substantially uppermost portion in the vertical thickness direction of the main body, and the weight portion is arranged at a position close to the sole surface portion or the face surface portion of the head, the weight portion is such that the sole plate extends from the headback portion to the face portion in order. A golf club head, characterized in that it is formed to be thick. 2. The head for a golf club according to claim 1, wherein a curved surface portion is formed on the upper surface portion of the head. 3. The golf club head according to claim 1, wherein a concave surface portion is formed on the head upper surface portion. 4. The head for a golf club according to claim 1, wherein a smooth surface portion is formed on the upper surface portion of the head. 5. The golf club head according to claim 1, wherein an uneven surface portion is formed on the head upper surface portion.