JPH11104282A - Club head for golf - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the swinging through of a ball hitting part and to improve the carry and directional stability of a ball by integrally extending and forming stabilizer rails which intersect orthogonally with a ball hitting direction with respect to a leading edge on the sole surface in the ball hitting part of a head so as to face backward. SOLUTION: This club head 1 for golf is molded by a powder metal injection molding means and is integrally formed with the ball hitting part 2 and a hosel part 3. In such a case, two pieces of the stabilizer rails 5, 5 which intersect orthogonally with the leading edge L.E and the ball hitting direction are integrally extended backward and formed on the sole surface 2c of the ball hitting part 2. These stabilizer rails 5, 5 are formed of heavy weight bodies contg. different metals, such as tungsten alloys, having the sp. gr. higher than the sp. gr. of titanium or titanium alloy. The sole surface 2c of the ball hitting part 2 is provided with plural lines of guide recessed parts 6 in the parts adjacent to the stabilizer rails 5, 5 to assist the ease of swinging through at the time of hitting the ball.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club head such as an iron club, and more particularly to improving the swing-out at the time of hitting by improving the shape of a sole surface in a head hitting portion. Improves flight distance and directional stability, facilitates warning identification of the head setting state with respect to the target ball flying line at the time of addressing, and enables accurate and stable setup and address attitude. It becomes.

[0002]

2. Description of the Related Art A golf game is a very mental sport in which a player sharpens his nerves at every stroke. In particular, when a missed shot is made, anxiety is generated in the next shot and mental Has a great effect on

For example, when making a tee shot at a tee ground, a player first stands behind a tee-up ball, determines a flying ball line connecting the target and the ball, and moves about 1 m ahead of the ball on that line. It is customary to search for a spat and enter an address.

The detailed procedure of the address varies depending on the taste and habit of each player. Of course, in general, the player faces the ball slightly away from the ball, and then decides the grip and moves the head from the front. Swing by setting the face to the ball and stance, setting up so that the shoulders, chest, and stance maintain a square shape, then repeating the waggle in small increments, breathing, and starting takeback from the stationary state It is working.

At this time, the player feels anxiety during the start of the swing operation from the setup. In particular, the setting state of the head with respect to the target ball flying line, that is, the face face of the head is the ball flying ball I'm worried if I'm setting up exactly on the line and I'm the most nervous.

As clues for checking such a setup, a plurality of scoring marks engraved on the face surface of the head, a leading edge on the sole surface side,
Alternatively, by using the top line as a guide,
At present, warning identification is performed.

[0007]

However, in the conventional golf club head described above, it is difficult to discriminate a warning even if scoring, leading edge, or top line is used as a guide, and the head at the time of addressing is difficult. Promotes anxiety about the setup and address posture of the user, and does not provide a mental sense of security.

SUMMARY OF THE INVENTION It is an object of the present invention to improve the swing-out at the time of hitting a ball, to improve the flight distance and directional stability of the ball, and to identify the warning of the setting of the head with respect to the target ball flying line at the time of address. It is an object of the present invention to provide a golf club head capable of easily performing the setting and addressing posture accurately and stably.

[0009]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention is directed to a sole surface of a hitting portion of a head formed by powder metal injection molding means, which is orthogonal to a leading edge in a hitting direction. In this case, the stabilizer rail is made of a dissimilar metal material and a guide recess is required at an adjacent portion thereof. It is formed accordingly.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, reference numeral 1 denotes a golf club head according to the present invention, for example, an iron club head. For example, it is formed of a metal material such as titanium or a titanium alloy by powder metal injection molding means described later.

The head 1 has a hitting portion 2 and a hosel portion 3.
Are integrally formed, and as shown in FIG.
The cavity surface 4 is formed in the back surface 2b corresponding to the face surface 2a of the
The c side is relatively wide and thickly bulged.

A hitting portion 2 for forming the head 1
On the sole surface 2c, two stabilizing rails 5, 5 orthogonal to the leading edge LE on the lower side of the face surface 2a and the hitting direction X are formed integrally extending rearward. Stabilize rail 5,5
Is formed of a weight body containing, for example, titanium or a titanium alloy and a dissimilar metal such as a tungsten alloy having a higher specific gravity than the titanium or the titanium alloy, whereby the center of gravity can be reduced.

Each of the stabilizer rails 5
As shown in FIG. 3, when the head 1 is viewed from above in the setting state at the time of addressing, the rear ends 5a of the heads 1 have a length L projecting rearward from the top line TL. As a result, a stable warning can be identified, and the head 1 at the time of hitting the ball is corrected in a direction in which the head 1 is easily swung by contact resistance with the turf, thereby improving the flight distance and directional stability of the ball. ing.

Reference numeral 6 denotes a plurality of guide recesses provided on the sole surface 2c of the head hitting portion 2. These guide recesses 6 are provided at portions adjacent to the stabilizer rails 5 and 5, respectively. The stabilizing rails 5 and 5 are formed so as to pass backward from the vicinity of the leading edges L and E, thereby facilitating the swing-out when hitting a ball.

The head 1 is manufactured by a powder metal injection molding method. The powder metal injection molding method is, for example, a method in which a fine metal powder raw material having a size of 1 to 600 μm, preferably about 5 to 100 μm is mixed with wax, A binder such as a resin is added and the compound of the kneaded metamold is granulated by a granulator and pelletized, and the pelletized head molding material is supplied to an injection molding machine and fluidized to a desired level. A head green body is formed by injecting and filling into a cavity of a molding die having an outer shape of the head, a heat treatment is performed on the head green body to remove a binder, and the head green body after the removal of the binder is sintered. The inside of the head 1 after molding exhibits a porous structure containing microbubbles.

In this way, the density of the head hitting portion 2 can be set and adjusted particularly in the range of 90% to less than 100% in order to easily control the material density at the time of head molding.

That is, in order to manufacture the head 1 having the above structure, as shown in FIG. 4, a powder material 21A of titanium or titanium alloy is placed in a cavity 11 of a molding die 10 having a predetermined head outer shape. Of the titanium or titanium alloy powder material 22A and a powder material 2 of a different metal having a higher specific gravity than titanium or a titanium alloy, for example, a tungsten alloy, etc.
Stabilize rail (weight body) made of a mixture with 2B
The head green body 20 is injection-molded by two-color molding or the like so that the molding material 22 is filled.

Next, the head green body 20 is subjected to heat treatment, and after sintering after binder removal, a completed product of the head 1 as shown in FIGS. 1 and 2 is obtained. The hitting portion 2 side of the head 1 and the bulging portion 5 forming the sole surface 2c side thereof are formed of a head molding material 21 during sintering of the head green body 20.
Raw material 21A of titanium or titanium alloy for forming powder
And the matrix contained in the material 22 for forming the stabilizer rail (weight body) is welded or diffused to the titanium or titanium alloy powder raw material 22A to be completely joined.

As described above, by molding the head 1 by powder metal injection molding means, the stabilizer rails (weight bodies) 5 and 5 can be easily formed on the sole surface 2c of the head hitting portion 2 in one step. In order to achieve this, the degree of freedom of the head shape is increased.

In the above embodiment, an iron club has been described as an example of a golf club head. However, the present invention can be applied to a wood club, a putter club, and the like.

[0021]

As is apparent from the above description, according to the present invention, a stabilizing rail which is perpendicular to the leading edge and the hitting direction is integrally formed on the sole surface of the head hitting portion and extends rearward. At the time of addressing, the protruding end of the stabilizer rail can be used as a guide, so that it is possible to easily perform warning identification of the setting state of the head with respect to the target ball flying line.

In addition, the head movement during gripping and takeback can be easily grasped.
It can provide a sense of security mentally, and can be expected to increase the probability of accurate shots.

Further, since the head is formed by the powder metal injection molding means, the stabilizer rail can be formed at the same time as the head. The dimensional accuracy and weight accuracy can be improved without the need for post-processing such as polishing, stabilizing the quality, and the metal base material that forms the head hitting part contains ultra-fine bubbles. In order to exhibit a porous structure, the elastic wave generated at the hitting part is scattered and interfered and attenuated by the extremely small bubbles at the time of hitting, so that the hitting feeling is soft and the sound is clear and high in tone Can be.

Further, the center of gravity can be reduced by forming the stabilizer rail from a weight body made of a different metal material having a higher specific gravity than the metal of the head.

Further, by providing a guide recess at a portion adjacent to the stabilizer rail, it is possible to promote the ease of swinging when hitting a ball.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an iron club head as one embodiment of a golf club head according to the present invention.

FIG. 2 is a sectional view of the same.

FIG. 3 is an explanatory diagram showing a visual state from above a head at the time of addressing.

FIG. 4 is an explanatory view showing a partially enlarged state of a head green body formed by powder metal injection molding means.

[Description of Signs] 1 ... head, 2 ... hitting portion, 2a ... face surface, 2b ... back surface, 2c ... sole surface, 3 ... hosel portion, 5 ... Stabilizing rail (weight body), 5a: Projecting end, 6: Guide recess, L: Projecting length of stabilizer rail, LE: Leading edge, TL: Top line X: Hitting direction.

Claims (3)

[Claims] The present invention is characterized in that a stabilizing rail perpendicular to a leading edge direction is integrally formed on a sole surface of a hitting portion of a head formed by powder metal injection molding means toward a rearward direction. Golf club head. 2. The golf club head according to claim 1, wherein the stabilizer rail is made of a weight body made of a dissimilar metal material. 3. The golf club head according to claim 1, wherein a guide recess is formed at a position adjacent to the stabilizer rail.