JP2006192110A - Golf club head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club head which can emit a hitting sound and a reverberation sound corresponding to a golfer's preference by changing the hitting sound occurring when the golfer hits a golf ball, and the reverberation sound which remains after the golfer has hit the golf ball. <P>SOLUTION: This golf club head 4 of a hollow structure is constituted of a face section which hits the golf ball, and an outer shell comprising a crown section, a sole section, a side section on the toe side and a side section on the heel side. The golf club head is equipped with a connecting section 15 which connects two facing parts from among the crown section, the sole section, the side section on the toe side and the side section on the heel side which constitute the outer shell. The connecting section 15 constrains a displacement occurring at the connected two parts when the golf ball is hit. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a golf club head capable of improving a hitting sound and a reverberant sound generated when a golfer hits a golf ball with a golf club.

In recent years, the hitting sound of golf clubs has been regarded as important, and various improvement proposals have been made. Further, as the golf club head becomes larger, the hitting sound tends to increase.
In addition, the hitting sound that can be heard at the time of hitting is not only good or bad of the golf club head, but also gives various information not only to the hitter but also to the surroundings, such as hitting movement and hitting points. From such a viewpoint, the importance of the timbre of the hitting sound is increasing.

As a technique for improving the hitting sound, a golf club head has been proposed that has a plurality of linear protrusions that protrude from the inner surface of the crown portion or the inner surface of the sole portion and extend in a direction substantially perpendicular to the face portion (for example, , See Patent Document 1).
Patent Document 1 discloses that this golf club head actively resonates and interferes with the dense air waves generated in the hollow portion when the linear protrusion hits the ball, thereby causing the reverberant sound to reverberate for a long time and improving the hitting sound. Disclosure.
JP 2002-126136 A

  However, there are people who feel that it is not desirable for golfers to increase the hitting sound at the time of hitting or to have a long reverberant sound. Such a golfer suppresses vibration by putting urethane or the like into the golf club head in order to suppress the hitting sound. According to Patent Document 1, the reverberant sound can be increased, and the hitting sound and the reverberant sound cannot be changed according to the preference of the golfer.

  The present invention has been made in view of such problems, and by changing the sound generated when a golfer hits a golf ball and the reverberant sound remaining after the golfer hits the golf ball, It is an object of the present invention to provide a golf club head capable of emitting a hitting sound and a reverberation sound according to preference.

In order to achieve the above object, the present invention provides a golf club having a hollow structure comprising a face portion for hitting a golf ball and an outer shell comprising a crown portion, a sole portion, a toe side portion and a heel side portion. The head includes a connecting portion that connects two opposing portions of a crown portion, a sole portion, a toe side portion, and a heel side portion that form an outer shell, and the connecting portion hits a golf ball. In the meantime, a golf club head is provided that restrains the displacement generated in the two connected portions.
It is preferable that the connecting portion further includes an adjusting portion for adjusting a pressing force for restraining a displacement generated when the golf ball is hit.
Further, the connecting portion may restrain the displacement in the inner direction acting on the two connected portions of the outer shell. Or a connection part may restrain the displacement of the outward direction which acts with respect to the said two parts connected among outer shells.
Furthermore, it is preferable that the coupling portion forms a vibrating body that is set to have a desired resonance frequency.

The golf club head of the present invention can change the hitting sound generated when the golfer hits the golf ball and the reverberant sound remaining after the golfer hits the golf ball.
By doing so, a hitting sound and a reverberation sound according to the golfer's preference can be emitted.

  The golf club head of the present invention will be described in detail based on the embodiments shown in the accompanying drawings.

FIG. 1 is a perspective view showing an outline of a first embodiment of a golf club to which a golf club head of the present invention is applied.
As shown in FIG. 1, a golf club 1 according to this embodiment includes a golf club shaft 2, a grip 3 that covers one end of the golf club shaft 2, and a golf club head 4 that is attached to the other end of the golf club shaft 2. The golf club head 4 is connected to the golf club shaft 2 via a socket 5 on a hosel projecting upward on the heel side.
The golf club shaft 2 is a hollow cylindrical body over its entire length, and is formed of a lightweight fiber-reinforced resin material, for example, a resin material reinforced with carbon fiber or glass fiber. The grip 3 is a portion where the golfer grips the golf club, and is formed of, for example, rubber or leather.
The golf club head 4 of the present invention has a hollow structure because it includes a face portion for hitting a golf ball and an outer shell including a crown portion, a sole portion, a toe side portion, and a heel side portion. .
The face portion of the golf club head 4 is formed of various metal materials such as stainless steel or a titanium alloy having a high breaking strength, and the sole portion or the crown portion of the golf club head 4 is a fiber reinforced resin material such as a carbon fiber reinforced resin material. And so on.

  FIG. 2 is a view showing an example of an AA cross section of the golf club head shown in FIG. The crown portion has an insertion hole in the approximate center, a stepped portion 12 is provided on the inner peripheral surface of the insertion hole, the sole portion has a through hole, and a stepped portion 14 is provided on the inner surface of the through hole. .

The connecting portion 15 that passes through the insertion hole in the crown portion and the through hole in the sole portion is composed of a connecting portion main body 16 and a fastening portion 18.
The connecting portion main body 16 is inserted from the insertion hole in the crown portion and protrudes from the through hole in the sole portion. A head portion is provided at an end of the coupling portion main body 16 on the crown portion side, and the head portion engages with the stepped portion 12 of the insertion hole.
On the other hand, an end portion on the sole portion side is provided with a male screw portion, and this male screw portion protrudes from the through hole. The protruding male thread portion of the connecting portion main body 16 is screwed into the female thread portion of the fastening portion 18 and engages with the stepped portion 14 of the through hole.

The head of the connecting portion main body 16 is provided with a hexagonal hole or a cross hole (not shown), and the connecting portion main body 16 is rotated by rotating the connecting portion main body 16 using a tool such as a hexagon wrench or a screwdriver. Is fastened to the fastening portion 18 with screws.
As described above, the connecting portion 15 is screwed to the male screw portion of the connecting portion main body 16 and the female screw portion of the fastening portion 18 by using a tool, so that the sole portion becomes the direction of the insertion hole of the crown portion. Press on. In response to this, the male thread portion of the connecting portion main body 16 presses the crown portion toward the through hole of the sole portion.
In other words, the connecting portion 15 acts to restrain outward displacement with respect to the crown portion and the sole portion.

With reference to FIG. 3 and FIG. 4, the effect by the connection part 15 restraining outward displacement with respect to a crown part and a sole part is demonstrated.
FIG. 3 is a diagram showing a frequency waveform of a hitting sound generated by a golf head when hitting a golf ball. FIG. 3A shows a frequency waveform when a normal golf club head is used, and FIG. b) shows a frequency waveform when a golf club head having a connecting portion is used.
In the case shown in FIG. 3A, a frequency peak appears in the vicinity of 4000 Hz. In the case shown in FIG. 3B, a peak appears in the vicinity of 6000 Hz in addition to the vicinity of 4000 Hz, and the peak value near 4000 Hz. Is decreasing. That is, when a golf club head having a connecting portion is used, the peak frequency of the hitting sound generated by the golf club head at the time of hitting can be suppressed, and the peak frequency can be changed. Can be changed.
That is, by restricting the displacement of the golf club head associated with the hitting of the golf ball, it is possible to adjust the hitting sound generated by the golf head at the time of hitting.

FIG. 4 is a view showing a sound pressure vibration waveform of reverberant sound after hitting a golf ball with a golf club, and FIG. 4 (a) shows a sound pressure vibration waveform when a normal golf club head is used, FIG. 4B shows a sound pressure vibration waveform when a golf club head having a connecting portion is used.
The sound pressure vibration waveform is an attenuation waveform whose amplitude decreases with time as shown in FIG. In the case shown in FIG. 4B, the time for the amplitude to decay is faster than in the case shown in FIG. 4A, and the golfer feels the reverberant sound shorter than usual.
Therefore, the reverberant sound after hitting can be shortened by restraining the displacement of the golf club head accompanying the hitting of the golf ball.

  As described above, by restraining the outward displacement with respect to the crown portion and the sole by the connecting portion, the vibration generated when the golfer hits the golf ball with the golf club is suppressed, and when the golf ball is hit The hitting sound emitted by the golf head and the reverberant sound of the golf club head after the golfer hits the golf ball with the golf club can be changed.

In the connecting portion 15, outward tension is applied to the head on the crown portion side and the male screw portion on the sole portion side, so the connecting portion 15 is formed by a member having rigidity sufficient to withstand this tension. However, it is preferable that the golf club head is made of the same material as titanium alloy or stainless steel, but the material of the connecting portion is not particularly limited.
Examples of the connecting portion main body include a hexagon socket head cap screw and a cross-recessed machine screw, and examples of the fastening portion include a nylon nut and a self-locking nut.

  By the way, the vibration mode and the natural frequency of the golf club head are related to the hitting sound generated when the golfer hits the golf ball or the reverberant sound remaining after the golfer hits the golf ball. Therefore, with reference to FIG. 5, the vibration mode and the natural frequency will be described. FIG. 5 shows a cross-sectional view of a conventional golf club head.

  The natural vibration has a plurality of modes, but the primary natural vibration causes the golf club head to vibrate the most, so it is considered that the influence on the hitting sound and the reverberant sound is large compared to the other modes. Therefore, the primary natural vibration generated when the golfer hits the golf ball with the golf club is schematically shown by a dotted line.

  Since the golf club head catches the golf ball at the face portion, when the golfer hits the golf ball, the face portion vibrates and the crown portion and the sole portion also vibrate. That is, at the moment of hitting the golf ball, the face portion is recessed and the crown portion and the sole portion are projected. Therefore, by adjusting the vibration of the crown portion and the sole portion, it is possible to change the hitting sound and reverberation sound of the golf club head.

Therefore, in the golf club head of this embodiment, the crown portion and the sole portion are restrained so as to suppress vibration by applying a pressing force to the crown portion and the sole portion from the outside by the connecting portion.
Therefore, the hitting sound generated by the golf head when the golfer hits the golf ball with the golf club, and the reverberation sound of the golf club head after the golfer hits the golf ball with the golf club, when using a conventional golf club It changes in comparison with the percussion sound and reverberation sound.
Furthermore, since the golf club head of the present embodiment can adjust the pressing force of the connecting portion that restrains the crown portion and the sole portion, it can adjust the hitting sound and reverberation sound according to the golfer's preference. .

In the first embodiment, the connecting portion is composed of a connecting portion main body having a head on the crown side and a screw portion on the sole side, and a fastening portion having a female screw portion. However, the connecting portion may be configured using a vibrating body. 6 is a view showing another example of the AA cross section of the golf club head shown in FIG.
In such a case, the connecting portion 15 is composed of the vibrating body 20 and the fixtures 22 and 24. The fixture 22 engages with the stepped portion 12 inside the insertion hole of the crown portion. The structure is windable and engages with a stepped portion 14 inside the through hole on the sole portion side.
The vibrating body 20 is fixed at both ends by a fixing tool 22 on the crown side and a fixing tool 24 on the sole side, and the vibrating body is wound by the winding tool 24 that can be wound on the sole side, and the tension is adjusted. .
The vibrating body is formed of a material that can efficiently sustain the vibration excited by the impact, and may be any material that can withstand the tension received from the crown portion and the sole portion. Examples of the material of the vibrating body include steel such as piano wire and guitar strings, nylon, and wire.
By configuring the connecting portion using the vibrating body 20 in this manner, the outward displacement of the crown portion and the sole portion is restrained, and the vibrating body vibrates in resonance with the vibration of the face portion. For this reason, the hitting sound at the time of hitting the golf club head and the reverberant sound after hitting can be changed, and furthermore, the tension applied to the vibrating body can be adjusted by the fixing device that can be wound. Therefore, the degree of freedom of adjustment related to the reverberant sound according to the preference of the golfer is improved.
Further, not only one such connecting portion but also a plurality of connecting portions may be provided. By doing so, the reverberant sound can be adjusted so that the plurality of vibrating bodies vibrate and play chords.

The golf club head of the present invention will be described based on the second embodiment. In the first embodiment, a pressing force is applied to the crown portion and the sole portion of the golf club head from the outside to restrain the outward displacement of the crown portion and the sole portion.
In the second embodiment of the present invention, an inward displacement of the crown portion and the sole portion is restrained by applying a pressing force from the inside to the crown portion and the sole portion of the golf club head. The same components are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 7 is a perspective view showing an outline of a second embodiment of the golf club to which the golf club head of the present invention is applied. FIG. 8 is a view showing an example of a BB cross section of the golf club head shown in FIG.

The crown portion is provided with a concave portion 26 at substantially the center of the inside, the sole portion has an insertion hole, and a stepped portion 28 is provided on the inner surface of the insertion hole.
A recess is provided in the crown portion at a position facing the insertion hole of the sole portion, and the connecting portion is positioned by contacting the fastening portion with the recess.
The sole portion has an insertion hole at substantially the center, from which a tool such as a hex wrench or a screwdriver is inserted. A stepped portion 28 is provided on the inner surface of the insertion hole. The crown portion is provided with a concave portion 26 at a position facing the insertion hole of the sole portion, and the concave portion 26 prevents the connecting portion 15 from being displaced from the position.

The connecting portion 15 includes a connecting portion main body 16 and a fastening portion 18.
A head portion is provided at an end portion of the connecting portion main body 16 on the sole portion side. The head portion of the connecting portion main body 16 is provided with a hexagonal hole, a cross hole, or the like (not shown), and the connecting portion main body 16 is turned into a crown portion by rotating the connecting portion main body 16 from the insertion hole using a tool. And presses the stepped portion 14 of the sole portion.
A male screw portion is provided at the crown side end of the connecting portion main body 16, and this male screw portion is screwed into the female screw portion of the fastening portion 18.

  The fastening portion 18 is screwed to the threaded portion of the connecting portion main body 16 and is positioned by the concave portion 26, and presses the crown portion from the inside in accordance with the rotation of the connecting portion main body 16 by a tool.

In this embodiment, the connection part 15 presses a sole part and a crown part outside by rotating a connection part main body in the direction which loosens a screw with a tool from the state which contact | connected the sole part and the crown part.
In other words, the connecting portion 15 acts to restrain the inward displacement with respect to the crown portion and the sole portion.
By doing so, as described above, the displacement of the golf club head associated with the hitting of the golf ball is restrained, the peak of the hitting sound frequency at the time of hitting is suppressed, the peak frequency is changed, and the amplitude is changed. The decay time can be shortened.
In other words, the vibration generated when the golfer hits the golf ball with the golf club is suppressed, the sound generated by the golf head when the golf ball is hit, and the golf club head after the golfer hits the golf ball with the golf club The reverberation sound can be changed.
Furthermore, since the golf club head of the present embodiment can adjust the pressing force of the connecting portion that restrains the crown portion and the sole portion, it can adjust the hitting sound and reverberation sound according to the golfer's preference. .

  In the above embodiment, the connecting portion restrains the crown portion and the sole portion. However, the golf club head of the present invention is not limited to this, and the facing portion is the crown portion, the sole portion, the toe side portion, or the heel side portion. Two parts to be connected may be constrained.

  It should be noted that the golf club of the present invention is not limited to the above-described embodiment, and it is needless to say that various improvements and changes may be made without departing from the gist of the present invention.

1 is a perspective view schematically showing a first embodiment of a golf club to which a golf club head of the present invention is applied. It is a figure which shows an example of the AA cross section of the golf club head shown in FIG. It is a figure which shows the frequency waveform of the hitting sound which a golf head emits when hitting a golf ball. It is a figure which shows the sound pressure vibration waveform of the reverberation sound after hitting a golf ball with a golf club. It is a schematic diagram for demonstrating the primary natural vibration which arises when a golf ball is hit. It is a figure which shows the other example of the AA cross section of the golf club head shown in FIG. It is a perspective view which shows the outline of 2nd Embodiment of the golf club to which the golf club head of this invention is applied. It is a figure which shows an example of the BB cross section of the golf club head shown in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Golf club 2 Golf club shaft 3 Grip 4 Golf club head 5 Socket 12 Step part 14 of crown side, 28 Step part of sole side 15 Connection part 16 Connection part main body 18 Fastening part 20 Vibrating body 22, 24 Fixing tool 26 Recess

Claims (5)

A golf club head having a hollow structure composed of a face portion for hitting a golf ball and an outer shell comprising a crown portion, a sole portion, a toe side portion and a heel side portion,
A connecting portion that connects two opposing portions of the crown portion, the sole portion, the toe side portion, and the heel side portion that constitute the outer shell,
The connecting portion is a golf club head that restrains displacement generated in the two connected portions when a golf ball is hit.   The golf club head according to claim 1, wherein the connecting portion further includes an adjusting portion for adjusting a pressing force for restraining a displacement generated when the golf ball is hit.   The golf club head according to claim 1, wherein the connecting portion restrains displacement in an inner direction acting on the two connected portions of the outer shell.   3. The golf club head according to claim 1, wherein the connecting portion restrains an outward displacement acting on the two connected portions of the outer shell.   The golf club head according to claim 4, wherein the connecting portion forms a vibrating body that is set to have a desired resonance frequency.

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