JPH084645B2 - Golf club head - Google Patents

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, and more particularly to a club head suitable for metal wood.

[0002]

2. Description of the Related Art Golf clubs have woods and irons with different lofts (inclination of the face to be hit) with different elevation angles. However, the individual head weights of these clubs and their balance are determined by the user. It is customary to make your own adjustments according to your taste and skill, and heavyweight sheets are commercially available for this adjustment. This heavy sheet has an adhesive layer formed on the back surface of a thick lead tape,
A piece cut into a required size is attached to the outer surface of the head piece by utilizing the adhesive force of the adhesive layer.

However, when such a heavy sheet is attached to the outer surface of the head piece, the heads are likely to come into contact with each other during transportation of the club or the like to cause the heavy sheet to be displaced or peeled off. However, in terms of appearance, the heavy seats were ugly and visually unappealing.

Further, since the above-mentioned heavy sheet cannot be attached to the bottom surface, that is, the sole portion, which rubs the face portion against which the ball hits at the time of hitting the ball, that is, the sole portion, it is generally attached to the peripheral side surface excluding the face portion. However, from the viewpoint of increasing the head speed at the time of hitting the ball by the centrifugal force of the club and extending the flight distance of the ball, it is desirable that the club head has a low center of gravity. When it is attached to the peripheral side surface, the center of gravity of the club head rises, which deteriorates the hitting function.

[0005]

In view of the above-mentioned circumstances, the present invention, as a golf club head, is less likely to cause positional deviation or peeling of the weight sheet attached for weight and balance adjustment, and the attached state thereof. The object of the present invention is to provide a product having a good appearance with a ball, and a low center of gravity when the weight sheet is adhered to exhibit a good hitting function, and a swing stability at the time of hitting is good. The second purpose is to provide the above, and the third purpose is to provide an excellent weight and balance adjusting function and strength.

Namely, golf club head of claim 1 according to the present invention, as a means for achieving the object above SL,
The sole part of the headpiece is formed in a mountain shape having a middle and high height.
Form a pair of wales into a shape that is distributed to both sides of the top of the sole.
The recess for attaching and attaching the weight sheet for adjusting the balance
As they are formed, both of these recesses create a ball hitting face.
The groove is long in the direction orthogonal to the
Shorter than the length in the front-back direction of the part, the front-back direction of the sole part
As a groove shape with both ends closed in the middle part of
As the face is formed,
Has a diverging shape, and the top of both recesses
The side edge near the top of the mountain-shaped sole is facing the face.
And form parallel straight lines along the orthogonal direction, far from the top
It is characterized in that the other side edge of one side is formed in a substantially C shape
It is what

[0007]

In the golf club head of the present invention, when the weight and balance are adjusted, the weight sheet can be fitted in the concave portion formed on the outer surface of the head piece and attached, so that the attached weight sheet is carried. It does not come into contact with other club heads in the middle or the like, and it is unlikely to be displaced or peeled off, and is inconspicuous in appearance. Then
If the recess is provided on the sole of the head piece bottom,
The center of gravity of the head after attaching the heavy sheet becomes lower.

[0008] Here, a recess provided in the sole is formed in a groove shape along the direction orthogonal to the phosphate <br/> scan unit
As a result , when the sole surface is rubbed against the ground when hitting the ball, the sliding resistance is reduced because the moving direction of the head and the groove direction of the recess match, and the groove of the recess makes the moving direction of the head the desired front-back direction. Produces an action to induce. Further, the weight balance can be finely adjusted in the front-rear direction by setting the front and rear positions of the weight sheet attachment position in the recess. Further, particularly in the case of metal wood, since the metal plate of the sole portion has ribs due to the groove-shaped recesses, the rib effect improves the strength of the head itself.

[0009] Thus, groove-shaped recess in the sole Article 2
Since it is provided , depending on the selection of the concave part for sticking the weight sheet and the difference in the number of sticking sheets, the tow
It is possible to adjust the weight balance in the heel direction and further increase the strength of the metal wood due to the rib effect.

In addition, in a so-called round-sole head in which the sole portion has a medium- and high-height mountain shape, the above-mentioned two groove-shaped concave portions are provided.
Since There has been distributed on both sides of the top of該山shaped,
And these groove-like recess is disengaged from the most contact easily the top with the ground at the time of hitting, the orthogonal contact with the surface and ground adhered by weight sheets is avoided, also weakens the contact with the grass or the like, the more the sole The heavy sheet is less likely to be displaced or peeled off due to sliding contact with the ground surface.

Furthermore, the recessed grooves of the two rows in the head of the Raundosoru reaches behind the front face side
Thus it is made as diverging shape, and by the side edge of the top side of the concave parts is set to parallel straight line along the direction orthogonal to the face portion, when the sole portion slides on the ground surface during hitting, The side edge of the parallel orthogonal shape produces a movement direction restriction effect, and the resistance force due to the sliding contact between both side edges arranged in a V shape on the side farther from the tops of the sole surfaces of both recesses and the ground movement causes the movement direction of the head to be concerned. As a result of acting toward the midline direction of the opening angle of both side edges, the action of guiding the moving direction of the head in the front-back direction is further increased.

The recess formed in the sole portion may have a depth such that the surface of the adhered weight sheet is lower than the surface of the sole portion, but the depth is such that a plurality of weight sheets can be stacked. It is possible to increase the adjustment range of the head weight and its balance by setting.

[0013]

1 to 3 show an embodiment in which the present invention is applied to a round sole type metal wood. In these drawings, (1) is a head piece, which constitutes a teardrop-shaped hollow shell in plan view by welding and joining a metal forming plate material such as stainless steel, and the club shaft is inserted at the top position of the teardrop shape. A general-purpose tubular portion (1a) is formed so as to project obliquely upward, and a synthetic resin foam (2) (see FIG. 3) such as polyurethane foam is filled inside the shell.
Thus, the front surface of the head piece, that is, the surface of the face portion (3) on the side of the hit ball is formed into a convex curved surface that is nearly flat and is set to a loft of a predetermined elevation angle, and a plurality of inner surfaces are provided with a plurality of convex surfaces. Reinforcing ribs (3a) (see FIG. 2) are provided in the up-down direction, and the surface of the sole portion (4) is formed in a mountain shape having a middle height in the left-right direction (toe-heel direction).

In the sole portion (4), a top portion (4a) located at the center has a ridge shape along the front-rear direction, and a pair of groove-shaped recesses (5) long in the front-rear direction are provided on both sides of the top portion (4a). (5) is formed in an axisymmetric arrangement. And both recesses (5)
Is (5) shorter than the length of the sole (4) in the front-rear direction?
Provided in an intermediate portion in the front-rear direction of the sole portion (4)
Is formed as a groove with both ends closed.
It An elliptical hole (6) is provided on the left end side of the sole portion (4), that is, on the heel side, and the tip end portion of the club shaft (7) inserted from the tubular portion (1a) is indicated by the phantom line in FIG. The elliptical hole (6) is obliquely fitted and fixed.

The both groove-shaped recesses (5) and (5) have a shape that widens toward the rear with the front end side, that is, the face portion (3) side as the front, and the side edge (5a) on the top portion (4a) side. ) (5a) forms a parallel straight line along the direction orthogonal to the face portion (3) (strictly, the orthogonal direction to the tangent in the left-right direction at the center of the face portion = front-back direction), and the other side edge (5a)
b) and (5b) are linearly arranged in a V shape, and the weight sheets (8) of corresponding shapes can be attached as shown in FIG. The depth of each groove-like recess (5) is the surface of the upper weight sheet (8) in the state where two weight sheets (8) are laminated and attached as shown by the phantom line in FIG. Is set to be lower than the surface of the sole portion (4).

Here, the weight sheet (8) is shown in FIG.
Adhesive layer (8b) on one side of thick lead sheet (8a) as shown in
And a release paper (8c) to protect it, peel off the release paper (8c) at the time of use, and use the flexibility of the lead sheet (8a) and the adhesive force of the adhesive layer (8b) to form a groove shape. Recess (5)
Can be attached in close contact with.

In the golf club head having the above structure, weight adjustment can be performed by attaching the weight sheet (8) to one or both of the pair of groove-shaped recesses (5) and (5), and the groove-shaped recesses (5) can be adjusted. 5) It is possible to adjust the weight balance in the left-right direction (toe / heel direction) by making a difference in the number of sheets of the weight sheet (8) attached to (5) (one may be 0), and If a sheet (8) smaller than the groove-shaped recess (5) is used, the weight balance in the front-rear direction can be finely adjusted by shifting the attaching position in the front-rear direction. If weight sheets (8) having different weights (thicknesses) are prepared, the weight and balance can be adjusted more finely. Moreover, since the center of gravity of the entire head is lowered by sticking the weight sheet (8), the flight distance of the ball is increased due to the increase of the centrifugal force at the time of hitting the ball.

Further, since the surface of the weight sheet (8) attached to the groove-shaped recesses (5) (5) is located lower than the surface of the sole portion (4), the club heads may come into contact with each other during transportation. Also, the contact of the weight sheet (8) itself is avoided, and in addition, since the groove-shaped recesses (5) and (5) are located on both sides of the top portion (4a) of the sole portion (4), the sole portion (4) is struck when the ball is hit. Even if the ground surface rubs, the force applied to the weight sheet (8) by sliding contact with the lawn is small, and the weight sheet (8) is less likely to be displaced or peeled off, and thus the adjusted weight and balance are less likely to get out of order. Top, appearance weight sheet (8)
There is almost no difference between the adhered state and the non-adhered state, and both look good. Further, by forming the groove-shaped recess (5), the sole portion (4)
Has a rib (4b) (see FIG. 2) on the inner surface side to increase the strength, and the head piece (1) as a whole has excellent strength.

[0019] However also, both the groove-like recess (5) (5) Since a long and divergent shape in the longitudinal direction is the moving direction of both of the hitting head, small resistance when the sole portion is rubbed surface In addition, the side edges (5a) and (5a) on the top (4a) side are parallel straight lines along the front-rear direction, and the direction control effect and the other side edges (5b) and (5b) arranged in a V shape are provided. Due to the inward guidance effect, the movement of the head is guided in the desired front-back direction, the swing stability of the club at the time of hitting the ball is increased, and thus very good hitting characteristics are obtained.

[0020]

According to the present invention, when adjusting the weight and balance of the head, the weight sheet for the adjustment can be fitted into the recess provided in the sole portion of the head piece and can be attached. There is no risk that the heavy weight sheet will come into contact with other club heads during transportation, resulting in misalignment or peeling, and the weights and balances that have been adjusted can be maintained without deviation, and the heavy weight sheet is visually unnoticeable and looks good. Can provide a good club head.

Further , the recess is provided in the sole portion.
Therefore, by attaching a heavy sheet, the center of gravity is set low,
Easy elongation much distance the ball centrifugal force is increased at the time of hitting, excellent strike performance, yet on hitting the sliding resistance is small when rubbed sole surface to the surface at the time, the recess is off
Formed as a long groove in the direction orthogonal to the base
Therefore, the moving direction of the head is guided in the desired front-back direction, the swing stability of the club is good, and the weight balance in the front-back direction can be finely adjusted. excellent thing as that Do the basis.

Further, it is easy to adjust the weight balance of the right and left direction, that the toe-heel direction by selecting and attaching number difference recess for attaching the weight sheet, also I and especially the strength of the metal wood is better It

[0023] Furthermore, in particular it can be realized the inducing action of the head moving direction by the grooved recesses can be provided with excellent by club swing stability.

[Brief description of drawings]

FIG. 1 is a bottom view of a round-sole type club head according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is a perspective view of the club head.

FIG. 4 is an enlarged vertical cross-sectional view of a groove-shaped concave portion of the same club head to which a weight sheet is attached.

FIG. 5 is a cross-sectional view of the weight sheet before use.

[Description of Reference Signs] 1 ... Headpiece 3 ... Face part 4 ... Sole part 4a ... Top part 5 ... Groove-shaped recess 5a ... Top side edge 5b ... Opposite side edge 7 ... Club shaft 8 ... Weight sheet 8a ... Lead Sheet 8b ... Adhesive layer

Claims (1)

[Claims] 1. The head piece has a sole-shaped portion with a medium- and high-height shape.
Formed and distributed on both sides of the top of the chevron sole
To fit a pair of weight balance adjustment weight sheets
While the concave portion for attachment is formed, both concave portions are
In the shape of a groove long in the direction orthogonal to the face part to hit the ball
It is shorter than the length of the sole in the front-back direction,
Groove shape with both ends closed in the middle part in the front-back direction
It is formed as a shape, and with the face side as the front
It has a shape that widens toward the rear,
The side edge of the concave part closer to the top of the chevron sole is
Make a straight line parallel to the face part in the orthogonal direction,
The other side edge farther from the top is formed in a substantially V shape.
A golf club head characterized by having.