KR200470054Y1 - Golf club head - Google Patents

Abstract

The present invention provides a golf club head which can swing in a straight line at the time of swing without complicating the shape of the soul face and is suitable for flying the ball in the straight line as possible. On the sole surface 14 of the fairway wood 10, a convex rib 20 is provided on the heel 14A side. This rib 20 extends along the direction orthogonal to the face surface 11, and is comprised including the upper end part 25 whose width is 4.5 mm-5.0 mm, and the maximum height is 2.5 mm-3.0 mm. have.

Description

Golf club head {GOLF CLUB HEAD}

The present invention relates to a golf club head, and more particularly, to a golf club head suitable for suppressing the swing of the head to swing in a straight line.

In order to fly a golf ball in a straight line, it is required to hit the face in a square state (a state in which the face is perpendicular to the aspherical direction).

However, it is not easy for an advanced person to hit the ball in a square, and there are many tendencies that cause a state in which the direction of the spin axis applied to the ball is changed to bend left and right.

The ball's curvature includes a lot of factors due to the player's swing movement. However, the ball other than the tee shot is in a state where the soul surface is in contact with the ground. Due to the ball is often bent.

Patent Literature 1 discloses a golf club head that aims to reduce the resistance when the sole surface of the head is grounded and to guide the head in a straight line.

Japanese Patent No. 3936887

The golf club head described in Patent Literature 1 is configured to provide a swelling portion that faces backward from the face surface in a middle region of the sole surface, and provides a relatively concave region (recess) between the swelling portions.

However, the golf club head described in Patent Literature 1 is merely a configuration in which a bulge is provided on the sole surface, and the head is caused by contact resistance with the ground when the head passes through the ball so as to strike the ball while the bulge is in contact with the ground. Tends to swing from side to side. This is considered to be the cause of the configuration in which the contact position between the sole surface and the ground becomes higher than the contact position between the bulging portion and the ground when striking the ball.

Moreover, the golf club head of patent document 1 has a problem that a bulging part raises the face surface of a head to the upper side, a face center becomes high and hits the upper side of a ball, and the position of the center of gravity of a head also changes. .

[Object of the invention]

The object of the present invention is to allow the sole surface to pass through while touching the ground, as in the conventional golf club head, and to impart the same action as guiding the passage at that time, so that it can swing in a straight line at the time of swing and make the ball as straight as possible It is to provide a golf club head suitable for flying with.

In order to achieve the above object, the present invention adopts the configuration described in the utility model registration claims, specifically, a golf club head provided with a convex rib on the sole surface,

While at least one said rib is provided in the heel side, it adopts the structure comprised including the upper end part whose width is 4.5 mm-5.0 mm, and the maximum height is 2.5 mm-3 mm. Outside the range of the width and height, the head fluctuates from side to side, and as a result, the ball spin axis caused by the striking becomes inclined with respect to the reference axis, and the straightness of the ball becomes difficult to ensure.

In the present invention, the rib extends back and forth along a direction substantially orthogonal to the face surface, and when the bottom portion of the sole surface passes while contacting the ground while maintaining the lie angle, the rib contacts the ground above the bottom portion. It adopts the structure that it is installed in the position to make.

In addition, the rib preferably extends back and forth through the intersection of the center axis of the hosel portion and the sole surface.

Moreover, the said rib is comprised including the area | region which leads to a soul surface through the inclined surface which gradually reduces height from the width direction both sides of the said upper end part.

In addition, the front end of the rib is located by retreating a predetermined distance from the intersection of the face surface and the sole surface, and the height and width are gradually provided as the front end of the rib, and may be installed to be connected to the upper end portion.

In the present invention, "contacting the ground" is an ideal view of the state of contact between the sole surface and the ground when the golf ball not teeed up is hit by the sweet area. Therefore, "contacting the ground" may include a case where the soul surface passes at a specific level with respect to the ground, and a state slightly shifted upward and downward with respect to the level. A "slightly shifted state" is a range except the states called "duff" and "top". The ground also includes land surfaces and / or lawns.

According to the present invention, on the heel side of the soul surface, a rib is provided so as to extend in the front-rear direction by changing a part thickness, and the width and the height are in the above range, thereby securing a track for maintaining the straightness of the head during swing. Can be. That is, the head is prevented from swinging left and right, and the face can be hit with the ball while keeping the square position with respect to the ball.

Moreover, by setting the position where the rib is provided in relation to the center axis of the hosel portion, the rib is present on the shaft axis, and the passage trajectory of the rib with respect to the ground can be easily maintained.

In addition, since both sides in the width direction of the ribs lead to the soul surface through the curved surface, the surface can be kept smooth, and problems such as extreme resistance when the soul surface moves while contacting the lawn do not occur.

In addition, since the front end side of the rib is formed to gradually increase in height and width toward the upper end portion, the initial resistance at which the face surface begins to contact the lawn does not become excessive, and it is expected to suppress the disadvantage that the head speed drops. Can be.

1 is a view of the head of the present invention applied to a fairway wood viewed from the face side.
2 is a view of the golf club head viewed from the soul face side;
3 is a view of the golf club head inverted and viewed from the heel side;
4 is an enlarged sectional view seen from the direction of the arrow AA in FIG. 2;
5 is a view like FIG. 1 showing a modification.
FIG. 6 is a view of the golf club head of FIG. 5 seen from the soul face side; FIG.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described with reference to the drawings.

As shown in FIGS. 1 and 2, a golf club head 10 of the type referred to as fairway wood has a face face 11 and a crown face 13 which is respectively connected to the upper and lower portions of the face face 11. ), The sole surface 14 and the crown surface 13 and the hosel portion 15 that extends above the heel side 14A of the soul surface 14, the shaft not shown in the hosel portion 15 It is configured to be attached.

As shown in FIG. 1, the sole surface 14 has an arc-shaped curved surface, and ribs 20 are provided on the heel side 14A (the right side in FIG. 1). The rib 20 extends in the front-rear direction (the orthogonal direction of the paper in FIG. 1), and as shown in FIG. 2, faces the direction substantially perpendicular to the face surface 11. Moreover, the front end of the rib 20 is located in the position which retracted by the distance L from the intersection part (edge) E of the face surface 11 and the soul surface 14, The height and width are gradually installed from the said position, and height H is provided. A maximum of 2.5 mm to 3.0 mm and a width W are connected to the upper end portion 25 having a constant width within a range of 4.5 to 5.0 mm. In addition, the upper end part 25 is a substantially flat surface, and the width direction both sides lead to the sole surface 14 through the inclination part 25A, and it shows a substantially trapezoid rib (refer FIG. 4) when a cross section is seen. The rear portion 26 connected to the upper end portion 25 is provided so as to be connected to the sole surface 14 by decreasing the height while gradually increasing the width. Therefore, when the sole surface 14 is viewed from the front, the rib 20 is flat so that the tip side (face side) is thin at the tip, the middle is approximately the same width, and the rear portion is gradually widened to fuse to the soul surface 14. It has a shape. In addition, the rear part is a part distinguished from the upper end part 25.

Next, the Example using the golf club which attached the shaft to the said head is demonstrated with a comparative example.

[Club Specifications]

Head: 09inpresC's

Shaft: YAMAHA Original Shaft MX-509F (Flex SR)

Number of times: 5 of Fairwaywood

Weight: 327 grams

Ly angle α: 60.25 degrees

Balance: D0

Rib position: The rib 20 passes through the intersection of the center axis S (see FIG. 4) of the hosel portion 15 and the sole surface 14, and faces in a direction perpendicular to the front and back, that is, the face surface 11. (Parallel to swing direction).

The golf clubs of the above specifications were held by the cita robot, and each of the five ball rudders was obtained to obtain a standard deviation of each spin axis. The standard deviation of the spin axis is the inclination of the central axis of the spin supplied to the ball. The smaller the difference with respect to the reference position (0 degree), the less the fluctuation of the acetabular, and the rib acts effectively to ensure the straightness. Incidentally, if the inclination of the spin axis is "0 degree", the ball will be in a completely straight line.

As is clear from Table 1, Examples 1 to 6, in which the height of the upper end of the rib was 2.5 mm to 3.0 mm and the width was 4.5 mm to 5.0 mm, were 2.9 even when the standard deviation of the spin axis was a maximum compared to Comparative Examples 1 to 21. In other words, it is demonstrated that the fluctuation of the acetabular is small. That is, since the ribs were provided in the said dimension setting range in Examples 1-6, compared with the comparative example 21 which does not have a rib at all, it becomes clear that the linearity of a hollow hole flies in a straight line. Further, in the case of the comparative example which does not satisfy the conditions of the height of 2.5 mm to 3.0 mm and the width of 4.5 mm to 5.0 mm, the standard deviation of the spin axis is more varied than the conventional type having no ribs, and the head is shaken from side to side. It is admitted.

In addition, the state of contact between the soul surface and the ground at the time of the above-mentioned shot is taken by a high-speed camera. At that time, the golf club passes along the lie angle α, and the lowermost portion of the soul surface 14 is in contact with the ground. It is admitted to pass through a state of contact with the lawn from a high position.

Although the best structure, method, etc. for implementing this invention are disclosed by the above description, this invention is not limited to this.

That is, although this invention is shown and demonstrated also especially about specific embodiment, those skilled in the art can add a various change with respect to the Example described above, without deviating from the technical idea and desired range of this invention.

For example, in the said embodiment, although the rib 20 was provided in the heel side 14A of the sole surface 14, for example, as shown to FIG. 5, FIG. The rib 21 may be provided. In this case, the rib 21 is formed so as to extend in the front-rear direction, and the front part can illustrate the structure which faces the inclination direction toward inner side rather than the rear part.

In addition, the golf club to which the present invention is applied does not prevent the application to iron golf clubs as well as wood, such as a golf club of the type referred to as fairway wood or utility.

10 ... Golf club head, 11... Face, 14... Soul, 14A... Hill side, 14B... Tow side, 15... Hosel, 20... Rib, 25... Top portion, 25A... Inclined portion, α. Lie angle

Claims (5)

It is a golf club head with a convex rib on the soul surface,
At least one said rib is provided in the heel side, The golf club head characterized by including the upper end part whose width is 4.5 mm-5.0 mm, and the maximum height is 2.5 mm-3.0 mm. The said rib is extended in the direction parallel to the swing direction of the said golf club head, Comprising: The lower part of the said soul surface is higher than the said lower part when it passes through contacting the ground in the state maintaining the lie angle. The golf club head, characterized in that installed in the position in contact with the ground. The golf club head according to claim 1 or 2, wherein the rib extends in a direction parallel to the swing direction of the golf club head through an intersection of the center axis of the hosel portion and the sole surface. The golf club head according to claim 1 or 2, wherein the rib includes a region leading to the sole surface through an inclined surface whose height is gradually decreased from both widthwise sides of the upper end portion. The front end of the rib is located backwards by a predetermined distance from the intersection of the face surface and the sole surface, and the front end of the rib is provided with a height and a width gradually increasing from the retracted position. Golf club heads are provided so as to continue.

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