JPH0626633B2 - Golf club head - Google Patents

Description

TECHNICAL FIELD The present invention relates to a golf club head.

[Problems to be Solved by Prior Art and Invention]

When a ball is hit at a position outside the sweet spot of the club head, the face surface of the head rotates, and the direction of flight or rolling of the hit ball often deviates from the target. Therefore, conventionally, as a method of reducing the rotation of the face surface of the head, a structure for increasing the moment of inertia around the shaft axis of the club head has been devised.

Examining the relationship between the direction of flight or rolling of the ball, the angle of the face surface of the head, and the direction of the swing trajectory of the head, in a conventional golf club, the hit ball is almost perpendicular to the face surface of the head. It was found that the effect of the direction of the swing trajectory of the head was very small, as it flew or rolled. The reason for this is that the contact time between the face surface and the ball in the conventional club head is extremely short. For conventional golf clubs,
Since the head is made entirely of hard metal, wood, hard plastic, fiber reinforced plastic, etc., the contact time with the ball is almost determined by the characteristics of the ball, and it is extremely less than 1/1000 seconds. It's a short time. Generally, the collision between the face surface of the golf club and the ball causes elastic deformation of both. in this case,
If the time for the deformation of the face surface to recover is sufficiently longer than the time for the deformation of the ball, the direction of ball flight or rolling is hardly affected by the angle of the face surface, and the direction of the swing trajectory of the club head. And the direction of the ball jumping or rolling becomes easier to control.

Therefore, it is desirable to provide a golf club head having a long contact time between the face surface and the ball when hitting the ball.

Conventionally, a golf club head has also been proposed in which a soft layer having elasticity is provided on the front surface side of the head body so that the contact time between the face surface and the ball becomes long. There is a problem that a lateral shift occurs along the line, and the desired shot cannot be obtained.

[Means for Solving the Problems]

According to the present invention, there is provided the above object, in a head of a golf club, in which a soft layer having elasticity is provided on the front surface side of the head main body, and a hard layer is provided on the front surface of the soft layer, at least the front surface of the head main body. One recess is formed, the soft layer has a protrusion that fills the recess, and a protrusion is provided on the back surface of the hard layer so as to face the recess of the head body. The problem is solved by the head of a golf club, wherein the protrusion is embedded in the protrusion of the soft layer.

[Action]

According to the above means of the present invention, the spring constant of the face surface of the golf club head can be reduced, and the contact time between the golf club face surface and the ball at the time of hitting the ball can be increased. The influence of the angle of the club face surface on the direction of flight or rolling is reduced, and, on the contrary, the direction of the swing trajectory of the club head is substantially matched. Therefore, it becomes easy to control the direction of flight or rolling of the ball. Further, since the spring constant of the face surface of the head can be changed over a wide range by the elastic soft layer, the contact time with the ball can be adjusted over a wide range.

Further, the cooperation of the recess on the head body side and the projecting portion of the soft layer prevents the soft layer from laterally shifting along the front surface of the head body when hitting a ball.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a case where the present invention is applied to the head of a putter club.

Referring to these figures, the club head 10 has a head body.
A soft layer 12 having elasticity is provided on the front surface 11a of 11 and a hard layer 13 is provided on the front surface 12a of the soft layer 12.
Furthermore, a plurality of recesses 14 are provided on the front surface of the head body 11, and the soft layer 12 has a protrusion 18 that fills the recesses 14. Further, a protrusion 19 is provided on the back surface of the hard layer 13 so as to face the inside of the recess 14, and the protrusion 19 is a protrusion 18 of the soft layer 12.
Embedded within.

The head body 11 can be made of metal such as iron, stainless steel, brass, aluminum alloy, or the like, or wood, hard plastic, metal fiber reinforced plastic, glass fiber reinforced plastic, or the like. On the other hand, here
The soft layer 12 is made of a rubber elastic body.

With the above configuration, the spring constant of the face surface of the club head 10 becomes smaller than that of the conventional one due to the presence of the soft layer 12, and the contact time between the face surface and the ball increases.
Further, by changing the material and thickness of the soft layer 12, the contact time between the face surface and the ball can be adjusted in a wide range.

Further, the soft layer 12 has a projection 18 that fills the recess 14 provided in the head body 11, and the projection 19 on the back surface of the hard layer 13 is embedded in the projection 18 of the soft layer 12, so that when hitting a ball. It is possible to prevent the soft layer 12 and the hard layer 13 from being laterally displaced along the front surface 11a of the head body 11. Therefore, the loss of impact energy can be reduced. Further, in general, when the hitting position of the ball deviates from the sweet spot, the hard layer 13 tends to be inclined with respect to the front surface 11a of the head main body 11, which tends to cause the ball to fly or roll in a different direction. According to this embodiment, the protrusion 19
And the thickness of the soft layer 12 between the head body 11 and
Since the inclination of the hard layer 13 is suppressed, the deviation in the ball ejection direction is reduced.

The present invention is not limited to the embodiments of the illustrated embodiments, and various changes can be made to the constituent elements within the scope of the invention described in the claims. For example, it goes without saying that the soft layer can be changed to a rubber elastic body, a resin foam body, or an equivalent damper structure. Further, the present invention is applicable to iron club heads and wood club heads as well.

〔The invention's effect〕

As is clear from the above description, according to the present invention, the spring constant of the face surface of the golf club head can be reduced by the soft layer having elasticity, and the contact time between the golf club face surface and the ball at the time of hitting the ball can be reduced. Therefore, the influence of the angle of the club face surface on the flight or rolling direction of the hit ball can be reduced, and on the contrary, the direction of the swing trajectory of the club head can be substantially matched. become. Therefore, it becomes easy to control the direction of flight or rolling of the ball. Further, since the spring constant of the face surface of the head can be changed over a wide range by the elastic soft layer, it is possible to provide a golf club head capable of adjusting the contact time with the ball over a wide range.

Further, according to the present invention, by sandwiching the soft layer between the wall of the recess provided in the head body and the projection provided in the hard layer, the soft layer is laterally displaced along the front surface of the head body when the ball is hit. Can be prevented, and thus the loss of impact energy can be reduced.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of a club head showing the case where the present invention is applied to a putter club head, and FIG. 2 is a horizontal sectional view taken along line AA of the head shown in FIG. 10 …… Club head, 11 …… Head body, 11a …… Head body front surface, 12 …… Soft layer, 12a …… Soft layer front surface, 13 …… Hard layer, 14 …… Recess, 18 …… Soft Layer protrusion, 19 ... Hard layer protrusion.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-52-120035 (JP, A) JP-A-54-4627 (JP, A) Actually-opened Sho-55-10675 (JP, U) Actual-opened Sho-52- 144055 (JP, U) Actual opening 47-14261 (JP, U) Actual opening 59-102062 (JP, U) Actual opening 35-31514 (JP, Y1)

Claims (1)

[Claims] 1. A golf club head having an elastic soft layer provided on the front side of a head body and a hard layer provided on the front side of the soft layer, wherein at least one recess is formed on the front side of the head body. The soft layer has a protrusion that fills the recess, and a protrusion is provided on the back surface of the hard layer so as to face the recess of the head body, and the protrusion of the hard layer is the protrusion of the soft layer. A golf club head, wherein the head is embedded in a protrusion.