JP7113764B2 - golf club head - Google Patents

Description

The present invention relates to golf clubs, and more particularly to golf club heads used in iron-type golf clubs.

Conventionally, an iron type golf club head (hereinafter referred to as a head) is integrated with a soft iron material, or a face portion (face member) separate from the head main body is adhered or welded to the head main body. , caulking and the like are known. In such a head, in order to improve the hitting performance, a gap is formed between the face portion and the back portion constituting the head body, as disclosed in Patent Document 1, for example. There is known one in which a weight (composite ceramics) is sealed in the gap.

Further, for example, as disclosed in Non-Patent Document 1, by forming a gap between the face portion and the head body and filling the gap with a vibration absorbing polymer, the face portion (face member) can be made high. There is also known a head that provides a mild hitting feel while using a strong material.

JP 2018-94125 A Iron club (TOUR B JGR HF2) posted on the website of Bridgestone Sports Co., Ltd. https://www.bs-golf.com/bs-products/club/iron/jgr#hf2.html

As described above, it is known that an iron-type golf club head has a cavity formed on the back side of the face portion and filled with ceramics or resin. It is filled so that the wall thickness on the sole side is thick. In this case, in order to absorb the vibration at the time of hitting the ball, if a vibration-absorbing polymer is filled as in the configuration disclosed in Non-Patent Document 1, the metal with a heavy specific gravity is reduced on the sole side, and the center of gravity is sufficiently lowered. cannot be realized. That is, with the known head structure described above, it is not possible to lower the center of gravity while improving the shot feel.

In addition, the face portion of the head of an iron-type golf club has a shape in which the vertical height on the toe side is higher than the vertical height on the heel side. It has a structure that is more difficult to bend than the side. For this reason, simply increasing the thickness of the filling resin on the sole side will unbalance the vibration absorption, and the vibration cannot be effectively reduced.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf club head with a low center of gravity and a good shot feel.

To achieve the above object, the present invention provides an iron-type golf club head having a head body having a top portion, a sole portion, a toe portion, a heel portion, a back portion, and a face portion on which a ball is hit. The head main body has a gap between the face portion and the back portion, and the gap is filled with a resin, and the face portion is thicker on the sole side than on the top side. is thick, and the resin is filled so that the thickness on the sole side is thinner than the thickness on the top side.

In the golf club head configured as described above, the gap between the face portion and the back portion is filled with resin, thereby suppressing vibration when hitting a ball with the face portion and improving the hitting feel. In this case, the face portion is thicker on the sole side than on the top side, and the resin is filled so that the thickness on the sole side is thinner than the thickness on the top side. The head does not become lighter, and the center of gravity of the head can be lowered while maintaining the vibration absorption effect. In addition, since the face portion is thicker on the sole side, the vibration of the face portion when hitting a ball is greater on the top side than on the sole side. Since the wall thickness is also thick, the vibration absorption effect is enhanced. That is, through the face surface, the balance of vibration absorption is improved, and vibration can be effectively reduced.

When viewed from the top-sole direction, the face portion is relatively thick on the sole side. The thickness of the area from the top portion to the sole portion may be changed stepwise, or the thickness may be changed continuously (thickness change in a tapered shape). Also good. That is, the thick region and the thin region may be separated by a step, or the thickness may gradually change from the thick region to the thin region (the surface is flush).

According to the present invention, it is possible to obtain a golf club head with a low center of gravity and a good feel at impact.

1 is a front view showing a first embodiment of a golf club head (iron type head) of the present invention; FIG. FIG. 2 is a view showing an assembled state of the head shown in FIG. 1; FIG. 3 is a cross-sectional view taken along line CC of FIG. 2; FIG. 2 is a cross-sectional view taken along line AA of FIG. 1; FIG. 2 is a cross-sectional view taken along line BB of FIG. 1; FIG. 4 is a diagram showing the thickness distribution of the face member; (a) is a diagram showing the thickness distribution of the resin filled in the gap, and (b) is a diagram showing an example of the actual thickness.

An embodiment of a golf club head according to the present invention will be described below with reference to the accompanying drawings.
1 to 5 are views showing an example of a head attached to an iron-type golf club according to the present invention. FIG. 1 is a front view, FIG. 2 is a view showing an assembled state of the head shown in FIG. 3 is a cross-sectional view along the CC line in FIG. 2, FIG. 4 is a cross-sectional view along the AA line in FIG. 1, and FIG. 5 is a cross-sectional view along the BB line in FIG. be.

The head 1 according to this embodiment is configured to be attached to an iron club, and the head body 2 constituting the head includes a top portion 2A, a sole portion 2B, a toe portion 2C, a heel portion 2D, a back portion 2E, And, it is configured to have a face portion 2F on which a ball is hit. A hosel 3 into which the tip of a shaft (not shown) is inserted and secured is formed on the heel side of the head body 2 . A separately formed plate-like face member 20 is attached to the face portion 2F to form the face portion 2F.

The materials of the head body 2 and the face member 20 are not particularly limited. can be integrally formed by In this case, any one of the structures constituting the head body 2, specifically, the top portion 2A, the sole portion 2B, the toe portion 2C, the heel portion 2D, the back portion 2E, and the face portion 2F, may be It may be integrally formed by casting or forging, and other portions may also be integrally formed by casting or forging, and the two may be integrated.

In this embodiment, the top portion 2A, the sole portion 2B, the toe portion 2C, the heel portion 2D, and the back portion 2E are integrally formed by casting or forging, and formed separately from this integrated structure. The head main body is constructed by welding the plate-shaped face member 20 (face portion 2F). In other words, the material used for the part where the ball is hit is optimized.
The back portion 2E is formed so as to have a recess (gap portion) 5 that opens toward the face on the rear side of the portion surrounded by the top portion 2A, the sole portion 2B, the toe portion 2C, and the heel portion 2D. It is The recess 5 is sized to press-fit the face member 20 to be fastened. A receiving portion 5a for receiving is formed. The stepped portion 5a has a depth substantially equal to the thickness of the face member 20, and a rib 6 is formed around the stepped portion 5a along the stepped portion.

The rib 6 is a portion where the face member 20 is press-fitted into the recess 5 and melted by welding while its peripheral edge portion is placed on the stepped portion 5a. The top portion 2A, the sole portion 2B, the toe portion 2C, and the heel portion 2D are fixed flush with the front surfaces thereof. When the face member 20 is attached to the head body, a gap S is formed between the back portion 2E and the face member 20 (face portion 2F), as shown in FIG.

An opening 2a is formed in the back portion 2E of the integrally formed head body, and the vibration absorbing material 10 can be filled through the opening 2a while the face member 20 is secured. The vibration absorbing material 10 may be any material as long as it absorbs vibrations transmitted to the face member 20 when the ball is hit. A vibration absorbing material (hereinafter referred to as resin) 10 is filled into the space S through the opening 2a without gaps. , the opening 2a is closed. Moreover, it is sufficient that one or more openings 2a are formed, and by forming the openings 2a at a plurality of locations, it is possible to easily fill the gaps S with the resin without gaps.

The back portion 2E of the present embodiment has a recess 2b formed on the rear side, and the head has a so-called cavity structure. It may be formed in a shape.

The top portion 2A, the sole portion 2B, the toe portion 2C, and the heel portion 2D each have a predetermined thickness in the face-back direction. The thickness in the direction is increased to lower the center of gravity. The front sides of the top portion 2A, the sole portion 2B, the toe portion 2C and the heel portion 2D are formed so as to be inclined at a predetermined angle with respect to the horizontal plane, and the face member 20 is stopped at a predetermined loft angle according to the number. configured to wear. In order to lower the center of gravity, the sole portion 2B may be made of a material having a higher specific gravity than the other components, or may be separately attached with a weight.

6 and 7 in addition to FIGS. and explain. 6A and 6B show the thickness distribution of the face member 20, FIG. 7A shows the thickness distribution of the resin filled in the gap S, and FIG. It is a figure which shows an example of the actual thickness of the resin which is made.

The face portion of the head of the iron club has a shape in which the height in the top-sole direction is high on the toe side and low on the heel side, and the heel side has a shape that is difficult to bend. For this reason, when considering the deflection balance of the face portion, the thickness of the face portion 2F, as viewed in the toe-heel direction, is favorable by making the toe side thicker and the heel side thinner, as shown in FIG. It is formed so as to have a good bending balance.

As for how the thickness changes, when viewed in the toe-heel direction, it is sufficient that the toe side is thicker and the heel side is thinner (as shown in FIG. 5, the toe side thickness T1 > the heel side thickness T2). ), the thickness may be changed in a stepwise manner, or may be changed in a tapered shape (flat surface). However, considering the propagation of vibration in the face portion, it is preferable to change the thickness in a tapered manner so as not to cause an inflection in the propagation of vibration due to a sudden change in thickness. Regarding the thickness, considering the center line passing through the center point of the face in the direction of the top and sole, it is sufficient if the toe side is relatively thick and the heel side is thin. May exist.

On the other hand, when looking at the shape of the face from the top to the sole, the width on the top side and the width on the sole side are almost equal. As shown in FIG. 6, when viewed in the top-sole direction, the top side is thin and the sole side is thick.

Regarding how the thickness changes, when viewed in the top-sole direction, it is sufficient that the top side is thin and the sole side is thick (as shown in FIG. 4, the top side thickness T3<the sole side thickness T4). ), the thickness may be changed stepwise or may be changed in a tapered shape (flat surface). However, as with the toe-heel direction described above, when considering the propagation of vibrations in the face portion, the thickness changes should be tapered so as not to cause an inflection in the propagation of vibrations due to a sudden change in thickness. It is preferable to change the shape. As for the thickness, when considering the center line passing through the center of the face in the toe-heel direction, it is sufficient that the sole side is thicker and the top side is thinner, and there are uneven thickness in local areas. May exist.

In the thickness distribution structure of the face portion 2F as described above, the thinned portion is likely to vibrate and the thickened portion is less likely to vibrate due to the impact at the time of hitting the ball. As shown in FIG. 7A, the thickness of the resin 10 filled in the face portion 2F is opposite to that of the face portion 2F. That is, when viewed in the toe-heel direction, the resin 10 filled in the space S is thinner on the toe side and thicker on the heel side, and when viewed in the top-sole direction, the resin 10 is thicker on the top side and thinner on the sole side. It's becoming

Therefore, in addition to the shape of the face member 20 whose thickness changes as described above, the surface shape of the bottom surface 5b of the recess 5 of the head body also causes the filled resin 10 to have a thickness as shown in FIG. 7(a). It is formed to have a thickness change situation.

As an example, the thickness of the resin 10 filled in the space S in this embodiment is varied as shown in FIG. 7B. FIG. 7(b) shows the thickness at four locations in the top-sole direction on the toe side, four locations in the top-sole direction in the center, and three locations in the top-sole direction on the heel side. In this case, the resin 10 to be filled has an uneven thickness structure of three areas, the top side area 10A, the central area 10B, and the sole side area 10C, when viewed in the top-sole direction. 7(b), the actual thickness of each corresponding region is different from the top side when viewed in the top-sole direction, as shown by the numerical values in FIG. The sole side is thinner than the top side region 10A (the thickness of the sole side region 10C is thinner than that of the top side region 10A). Along with this, the thickness of the face portion 2F becomes thicker on the sole side than on the top side when viewed in the top-sole direction, and thinner on the heel side than on the toe side when viewed in the toe-heel direction. is formed as

In the golf club head configured as described above, the space S is provided between the face portion 2F and the back portion 2E, and this space is filled with the resin 10, thereby suppressing vibrations when a ball is hit with the face portion 2F. As a result, the feel at impact can be improved. The face portion 2F is thicker on the sole side than on the top side, and the resin 10 is filled so that the thickness on the sole side is thinner than the thickness on the top side. Therefore, the sole side does not become lighter, and it is possible to lower the center of gravity of the head while maintaining the vibration absorbing effect. In addition, since the face portion 2F is thicker on the sole side and thinner on the top side, the top side is more flexed due to impact when hitting a ball, and the vibration of the face portion is greater on the top side than on the sole side. However, since the resin 10 disposed on the top side is thicker than that on the sole side, the vibration absorbing effect is enhanced.

In this case, in the present embodiment, the heel side of the face portion 2F is formed thinner than the toe side in the toe-heel direction so as to improve the deflection balance of the face portion 2F. The thickness of the resin 10 on the heel side is made thicker than that on the toe side. That is, when considering the toe-heel direction, the face portion 2F tends to vibrate higher on the heel side where the thickness is thinner, but the thickness of the resin filled in this portion is made thicker than on the toe side. By doing so, the vibration absorption effect is enhanced.

That is, according to the configuration of the present embodiment, the thickness of the face portion 2F and the filled resin 10 is varied in the top-sole direction and the toe-heel direction as described above. Overall, the balance of vibration absorption is improved (evened out over the entire face), making it possible to effectively dampen vibrations.

The thickness of the face portion and the thickness of the resin to be filled may be changed only in the top-sole direction. Even with such a configuration, the center of gravity can be lowered, and the effect of suppressing vibration and the vibration balance can be improved. Further, the thickness of the back portion 2E may be changed in the same manner as the face portion 2F. By configuring in this way, the center of gravity can be effectively lowered.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be modified in various ways. Regarding the thickness in the top-sole direction and the thickness in the toe-heel direction, it is sufficient that the thickness on both sides is relatively changed, and the thickness in the middle area is partially thickened. or may be thin and thick. For example, a rib or recess may be formed in the central region of the back surface of the face to locally vary the thickness. It may be a structure in which it becomes (thinner) and the resin at that position is partially thinned (thickened) accordingly.
In addition, the present invention is not limited to the shape of the head or the position or method of attachment between the components (top portion, sole portion, toe portion, heel portion, back portion, face portion). For example, the top portion, the sole portion, the toe portion, the heel portion, and the face portion may be integrally molded, and a gap may be provided on the back side thereof to secure the back portion. Also, the position of injecting the resin into the gap can be changed as appropriate. Further, the face member can be appropriately modified such as L-shaped, cup-shaped, etc., instead of plate-shaped.

1 Head 2 Head body 2A Top part 2B Sole part 2C Toe part 2D Heel part 2E Back part 2F Face part 5 Recess 10 Resin 20 Face member S Gap part

Claims (4)

An iron-type golf club head having a head body having a top portion, a sole portion, a toe portion, a heel portion, a back portion, and a face portion on which a ball is hit,
The head main body has a gap between the face portion and the back portion, and the gap is filled with a resin,
The face portion is thicker on the sole side than on the top side,
The resin is filled so that the thickness on the sole side is thinner than the thickness on the top side.
An iron-type golf club head characterized by: The face portion has a heel side thickness thinner than a toe side thickness,
The resin is filled so that the heel side is thicker than the toe side.
The iron-type golf club head according to claim 1, characterized in that: 3. The iron according to claim 1, wherein the face portion is separate from the head body and is composed of a plate-like face member that is secured to and integrated with the head body. shaped golf club head. The thickness of the resin filling the face portion and the gap portion varies in the toe-heel direction and the top-sole direction in a flat manner without steps. 4. The iron-type golf club head according to any one of items 1 to 3.

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