JPH0636657U - Golf club head - Google Patents

Abstract

(57) [Summary] [Structure] The sole surface 3 has a ridge 4. This ridge 4
Are formed from the face 1 side toward the head rear B. The ridge 4 has a triangular cross-sectional shape, and the tip 5 on the side of the face 1 is a hull-shaped ship bottom. [Effect] The contact frictional resistance with the ground is small and it is easy to swing out. The head traveling direction is corrected.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wood type golf club head.

[0002]

[Prior art]

 When hitting a golf ball on the ground, the wood type golf club head has a large ground contact area, and therefore has a large friction resistance.

When the head material is mainly made of wood, a metal plate called a sole plate is attached to prevent wear of the head material. In the case of so-called metal wood, which is made of metal, there is a strong demand not only for this wear prevention, but also for easier operation.

Therefore, in response to such a demand, a golf club head having a spherically convex sole surface called a round sole has hitherto been proposed.

[0005]

[Problems to be solved by the device]

 However, although this round sole reduces contact friction resistance, it is difficult to determine the face direction when holding the club, and also has the function of correcting the traveling direction when shaken while contacting the ground. Absent.

[0006]

[Means for Solving the Problems]

 In order to solve such a problem, the present invention has a ridge having a triangular cross-sectional shape on the sole surface and a face-side tip that is a bottom-bottomed type. , Formed.

[0007]

[Action]

 The ridge formed on the sole surface has a triangular cross-sectional shape, and the tip is a ship-bottomed type, so there is little contact frictional resistance and it is easy to swing out (without deceleration). Moreover, since this ridge has the above-mentioned shape and is formed from the face side toward the rear of the head, the head traveling direction is corrected at the moment when the sole surface comes into contact with the ground during the swing. Keeps going straight.

Further, when the club is held, the face can be stably directed to the front.

[0009]

【Example】

 Hereinafter, the illustrated embodiment will be described.

In the front view of FIG. 1 and the bottom view of FIG. 2, 1 is a face, 2 is a shaft connecting portion, and 3 is a sole surface. For example, a wood-type club made entirely of metal. Head: Indicates a so-called metal wood.

On the sole surface 3, two ridges 4 and 4 are integrally formed so as to project from the face 1 side toward the head rear B.

The ridge 4 has a triangular cross-sectional shape (as is clear from FIGS. 1 and 4), and the tip 5 on the face 1 side (as shown in FIGS. 2 and 3) is a hull-bottomed type. It has a shape with a narrow width toward the tip and a gradually lower height.

In FIG. 3A, the height of the tip 5 is gradually reduced so as to draw a large radius R. Further, in (b) of FIG. 3, the height decreases due to the straight slope.

In FIG. 4, it is desirable that the height H of the ridge 4 is set to 2 mm to 4 mm and the width dimension W is set to 2 mm to 4 mm.

Further, in FIG. 3, it is desirable that the length L of the ridge 4 is 20 mm to 40 mm.

In addition, depending on the case, the number of the ridges 4 may be singular, or may be three or four.

It should be noted that the present invention may be applied to a wooden head to attach a protrusion 4 to a metal plate called a sole plate (not shown). Further, as the shape of the ridge 4, it is also preferable that the end portion of the head rear B is also tapered. Further, in the bottom view shown in FIG. 2, the shape of each protrusion 4 may be a wing shape. (Of course, in that case as well, the cross section is triangular and the tip 5 is of a ship-bottom type.)

[0018]

[Effect of device]

 The present invention has the following significant practical effects due to the above configuration.

(Because the cross-sectional shape is triangular), the cross-sectional area of the ridge 4 is small, the contact frictional resistance with the ground is small, and it is easy to swing out.

(Because the cross-sectional shape is triangular), the ridge 4 sufficiently penetrates into the ground, and the ridge 4 has a large direction correction effect for correcting the traveling direction of the head.

(Because the tip 5 of the ridge 4 is of a ship bottom type), the resistance at the moment when the tip 5 of the ridge 4 touches the ground and rushes into the ground is small and smooth, and the head advancing direction may change. I made it low.

As a whole, it is easy to hit the golf ball with high accuracy in the target direction.

[Submission date] December 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Compensation target item name] Detailed explanation of the device

[Correction method] Change

[Correction content] [Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a wood type golf club head.

[0002]

[Prior art]

 When hitting a golf ball on the ground, the wood type golf club head has a large ground contact area, and therefore has a large friction resistance.

When the head material is mainly made of wood, a metal plate called a sole plate is attached to prevent wear of the head material. In the case of so-called metal wood, which is made of metal, there are strong demands not only for this wear prevention but also for functionalities such as easier hitting.

Therefore, in response to such a demand, a golf club head having a spherically convex sole surface called a round sole has hitherto been proposed.

[0005]

[Problems to be solved by the device]

 However, although this round sole reduces contact friction resistance, it is difficult to determine the face direction when holding the club, and also has the function of correcting the traveling direction when shaken while contacting the ground. Absent.

[0006]

[Means for Solving the Problems]

 In order to solve such a problem, the present invention has a ridge having a triangular cross-sectional shape on the sole surface and a face-side tip that is a bottom-bottomed type. , Formed.

[0007]

[Action]

 The ridge formed on the sole surface has a triangular cross-sectional shape, and the tip is a ship-bottomed type, so there is little contact frictional resistance and it is easy to swing out (without deceleration). Moreover, since this ridge has the above-mentioned shape and is formed from the face side toward the rear of the head, the head traveling direction is corrected at the moment when the sole surface comes into contact with the ground during the swing. Keeps going straight.

Further, when the club is held, the face can be stably directed to the front.

[0009]

【Example】

 Hereinafter, the illustrated embodiment will be described.

In the front view of FIG. 1 and the bottom view of FIG. 2, 1 is a face, 2 is a shaft connecting portion, and 3 is a sole surface. For example, a wood-type club made entirely of metal. Head: Indicates a so-called metal wood.

On the sole surface 3, two ridges 4 and 4 are integrally formed so as to project from the face 1 side toward the head rear B.

The ridge 4 has a triangular cross-sectional shape (as is clear from FIGS. 1 and 4), and the tip 5 on the face 1 side (as shown in FIGS. 2 and 3) is a hull-bottomed type. It has a shape with a narrow width toward the tip and a gradually lower height.

In FIG. 3A, the height of the tip 5 is gradually reduced so as to draw a large radius R. Further, in (b) of FIG. 3, the height decreases due to the straight slope.

In FIG. 4, it is desirable that the height H of the ridge 4 is set to 2 mm to 4 mm and the width dimension W 2 is set to 2 mm to 4 mm.

Further, in FIG. 3, the length dimension L of the protrusion 4 is preferably 20 mm to 40 mm.

In addition, depending on the case, the number of the ridges 4 may be singular, or may be three or four.

Next, an experimental example will be shown.

[0018] That is, the round sole sole surface is rounded taking overall angular as spheres also the (conventional), which cross-sectional shape to form a protrusion of rectangle sole surface (comparative) The head speed was measured when the same amount was used by a hitting machine for each of the one having a triangular cross-section and the tip of the ship bottom type ridge formed on the sole surface ( invention product) .

In this case, the golf ball was placed on a mat having a fluff of about 10 mm, the center of the ball was set to 20 mm from the mat, and the initial head speed was set to 42 to 43 m / s .

[0020] Here, the only time was Tsu Duff same amount, after the head sweet spot was set to hit the center of the ball at the lowest point during the down club swing by hitting machine, the adjust the percussion apparatus, it had to be to lower the lowest point by a fixed amount.

The height of the ridge of the comparative product is 3 mm and the width thereof is 10 mm. Inventions goods of ridges is the height is set to 3mm.

As shown in FIG. 5, inventions of the head is base specific to conventional heads and comparative head, reduction of the head speed at the time was Dafu' by the same amount, it is seen that the smaller . Note that the amount of duffing in FIG. 5 refers to the amount of lowering of the lowest point by the impact machine.

It should be noted that the present invention can be applied to a wooden head to attach a protrusion 4 to a metal plate called a sole plate (not shown). Further, as the shape of the ridge 4, it is also preferable that the end portion of the head rear B is also tapered. Further, in the bottom view shown in FIG. 2, the shape of each protrusion 4 may be a wing shape. (Of course, in that case as well, the cross section is triangular and the tip 5 is of a ship-bottom type.)

[0024]

[Effect of device]

 The present invention has the following significant practical effects due to the above configuration.

(Because the cross-sectional shape is triangular), the cross-sectional area of the ridge 4 is small, the contact frictional resistance with the ground is small, and it is easy to swing out.

(Because the cross-sectional shape is triangular), the ridge 4 sufficiently penetrates into the ground, and the ridge 4 has a great effect of correcting the direction in which the head advances.

(Because the tip 5 of the ridge 4 is of a ship bottom type), the resistance at the moment when the tip 5 of the ridge 4 comes into contact with the ground is small and smooth, and there is a possibility that the head traveling direction may change. I made it low.

As a whole, it is easy to hit the golf ball in the target direction with high accuracy.

[Brief description of drawings]

FIG. 1 is a front view showing an embodiment of the present invention.

FIG. 2 is a bottom view.

FIG. 3 is an explanatory diagram of the shape and dimensions of a ridge.

FIG. 4 is an enlarged cross-sectional view taken along the line AA of FIG.

[Explanation of symbols]

 1 face 3 sole surface 4 ridge 5 tip B head rear

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[Procedure amendment]

[Submission date] December 9, 1992

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

FIG. 5 is a graph showing the relationship between head speed and amount of diff.

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 5

[Correction method] Added

[Correction content]

[Figure 5]

Claims (1)

[Scope of utility model registration request] 1. A golf club characterized in that a ridge having a triangular cross-sectional shape on the sole surface and a tip on the face side that is a bottom-opening type is formed from the face side toward the rear of the head. Club head.