JPH10137374A - Golf club head and golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club head by which the weight and the gravitational center position of the head can be adjusted and set by a weight, and the weight can be prevented from coming off. SOLUTION: A golf club head 1 has a metal body 2 having a surface 21 for hitting a golf ball. A recess 22 and a pair of holes 23 on the opposite sides of the recess 22 are formed in the rear side of the hitting surface 21. Weight 3 are fitted in the holes 23, and are inhibited from coming off from the holes 23 by means of weight fixing mechanisms 4 each of which is composed of a groove 41 formed in the outer peripheral surface of the weight 3, a groove 42 formed in the inner peripheral surface of the hole 23 at the corresponding position, and a C-ring (engaging member) 43 engaged with both the body 2 and the weight 3. A Belleville spring (urging member) 5 is accommodated between the bottom surface 231 of the hole 23 and one end face 31 of the weight 3, being compressed therebetween.

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 a golf club provided with the head.

[0002]

2. Description of the Related Art A golf club head is designed so that a force can be more reliably transmitted to a golf ball when the golf ball is hit with the hitting surface. For example, in a putter used on a green, the delicate control of the player's force determines the rolling distance of the golf ball, and the angle of the hitting surface at the time of the collision determines the direction in which the golf ball rolls. In order to ensure transmission, physical characteristics such as the weight of the head, the position of the center of gravity, and the rigidity and hardness of the hitting surface are important factors.

In a conventional golf club, the shape of the head (particularly the shape, size, and angle of the hitting surface), the weight, the position of the center of gravity, and the like are designed assuming an average player. Due to individual differences, it may not be optimal for you. In such a case, a weight such as, for example, plate lead is attached to a predetermined position of the head, and the weight and the center of gravity of the head are corrected individually.

However, since the weight of the plate lead is smaller than the weight of the head, the weight of the head cannot be greatly increased, and the head is only corrected by increasing the weight of the head. The weight cannot be reduced, so the range of the weight correction is small.

[0005] Also, since the head is not originally designed to have a shape for mounting an auxiliary material such as lead, the lead is attached, particularly when a large amount of lead is used. It is difficult to apply, and the position of pasting is restricted, and the shape after pasting becomes unnatural.

Further, there is another problem that when the adhesive strength of the attached sheet lead is weak or the adhesive force decreases with time, the sheet lead may be detached.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf club head which can set and adjust the weight and center of gravity of the head by means of the weight and which does not cause the weight to fall off, and a head having the same. A golf club.

[0008]

This and other objects are attained by the present invention which is defined below as (1) to (21).

(1) A metal body having a hitting surface of a golf ball, and at least one weight attached to the body, wherein the weight is inserted into a recess formed in the body, By the weight fixing mechanism provided in the recess,
A golf club head, wherein detachment from the recess is prevented.

(2) The golf club head according to the above (1), wherein the weight fixing mechanism includes an engaging member that is installed in the concave portion and engages with the main body and the weight.

(3) The engaging member is deformable so as to increase or decrease its outer dimension, and the outer dimension is increased in grooves formed on the inner surface of the recess and the outer surface of the weight. The golf club head according to the above (2), wherein the head is inserted at the position to prevent the weight from moving in the axial direction with respect to the concave portion.

(4) The golf club head according to the above (2) or (3), wherein the engaging member is a ring-shaped elastically deformable member partially missing in a circumferential direction.

(5) In any one of the above (2) to (4), an urging member for urging the weight so as to press the weight against the main body and / or the engaging member is provided in the concave portion. Golf club head.

(6) A metal body having a hitting surface of a golf ball, and at least one weight attached to the body, wherein the weight is inserted into a recess formed in the body, A golf club head, which is detachably installed in the recess.

(7) The golf club head according to (6), wherein the weight is fixed to the recess by screwing.

(8) The golf club head according to (6), wherein the weight is fixed to the recess by an attachment member.

(9) A metal body having a hitting surface of a golf ball, and at least one weight attached to the body, wherein the weight can change its own weight or the position of the center of gravity. A golf club head, characterized in that:

(10) The weight as described in (9), wherein the weight has a hollow portion, and its own weight or the position of the center of gravity can be changed by selectively inserting an object having a different weight into the hollow portion. A golf club head as described.

(11) The weight has a weight body and a movable body movable with respect to the weight body, and the position of the center of gravity can be changed by adjusting the position of the movable body with respect to the weight body. The golf club head according to (9) above.

(12) The golf club head according to any one of (6) to (11), wherein the fixing position of the weight with respect to the main body is adjustable.

(13) The golf club head according to any one of (1) to (12), wherein a pair of weights are mounted on both ends of the hitting surface of the main body.

(14) A golf club head having a metal main body having a hitting surface of a golf ball, and having concave portions into which weights can be attached near both ends of the hitting surface of the main body. A head for a golf club, comprising a weight fixing mechanism for maintaining the state once the weight is loaded into at least one of the two concave portions.

(15) A golf club head having a metal main body having a hitting surface of a golf ball, and having concave portions into which weights can be attached near both ends of the hitting surface of the main body. A golf club head characterized in that a plurality of different weights can be exchangeably loaded into at least one of the two concave portions.

(16) The golf club head according to any one of the above (1) to (15), wherein the weight has a rod shape.

(17) The golf club head according to any one of (1) to (16), wherein the specific gravity of the weight is greater than the specific gravity of the main body.

(18) The golf club head according to any one of (1) to (17), wherein the main body is made of Ti or an alloy containing Ti.

(19) The golf club head according to any one of (1) to (18), wherein the main body is manufactured by a metal powder injection molding method.

(20) The above (1) which is a putter head
Or the golf club head according to any of (19).

(21) A golf club comprising the golf club head according to any one of (1) to (20) attached to a tip of a shaft.

[0030]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a golf club head and a golf club according to the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIGS. 1, 2, 3, and 4 are a front view, a rear view, a plan view, and a right side view, respectively, showing an embodiment of a golf club head according to the present invention. As shown in these figures, a golf club head (hereinafter simply referred to as a “head”) 1 of the present invention has a metal main body 2.

The main body 2 has a hitting surface 21 for hitting a golf ball at the front thereof. On the back side of this hitting surface, a concave portion 2
2, and a pair of holes (recesses) 23 are formed at both ends. The cross-sectional shape of the hole 23 is
It is circular. The hole 23 has a weight 3 to be described later.
Is inserted (fitted).

In the center of the upper surface of the main body 2, a mark 24 indicating the position of the sweet spot on the hitting surface 21 is provided.

The main body 2 has a connecting portion (hosel) 25 at one end thereof for connecting to the shaft 10 of the golf club. The connecting portion has a rod shape that is bent or curved in a predetermined manner, and a hole 26 for fitting the shaft 10 is formed at the tip of the connecting portion.

The connecting portion 25 may be formed integrally with the main body 2 or may be formed by fixing another member.

A weight (balancer) 3 is mounted on such a main body 2. In the illustrated example, a pair of weights 3 are inserted into the corresponding holes 23, and the weight fixing mechanism 4 provided in the holes 23 prevents the weight 3 from coming off from the holes 23. Thus, by arranging each of the pair of weights 3 near both ends of the hitting surface of the main body, the head 1 can be easily balanced, and in particular, the center of gravity of the head 1 can be easily set near the center, so that the golf ball The impact force can be transmitted effectively to

FIG. 5 is a sectional view showing a state in which the weight 3 is inserted into the hole 23. The weight 3 in the present embodiment is a rod-shaped member having a circular cross section. In this case, the outer diameter of the weight 3 is set to a value equal to or slightly smaller than the inner diameter of the hole 23 (for example, the outer diameter of the weight 3: 1).
4 mm, inner diameter of hole 23: 14 mm + 0 to 0.04 mm).

A groove 41 is formed all around the outer peripheral surface of one end of the weight 3. On the other hand, at a position corresponding to the groove 41 on the inner peripheral surface of the hole 23, a groove 42 is formed over the entire circumference. The widths of the grooves 41 and 42 are substantially the same.

A C-ring 43 is inserted into each of the grooves 41 and 42 as an engaging member that engages with the main body 2 and the weight 3. As shown in FIG. 6, the C ring 43 has a ring shape with a part missing in the circumferential direction, and is made of an elastically deformable member such as various metal materials. Thereby, the C ring 43 has an outer diameter (outer dimension).
And it is elastically deformed so that the inner diameter increases or decreases.

The grooves 41 and 42 and the C-ring 43 constitute the weight fixing mechanism 4 for preventing the weight 3 from coming off the hole 23. Such a weight fixing mechanism 4
According to this, the weight 3 can be securely fixed with a small number of parts, and the weight 3 does not fall off or shift even if an impact or the like is applied when the golf ball is hit.

A disc spring 5 is provided in the hole 23 as an urging member for urging the weight 3 to press the weight 3 against the main body 2 and / or the C-ring 43. The disc spring 5 has a shape (spiral shape) as shown in FIG. 3 in a natural state (a state in which no external stress is applied), and the weight 3 is loaded into the hole 23 as shown in FIG. In this case, the bottom surface 231 of the hole 23 and the one end surface 31 of the weight 3 are compressed into a substantially flat shape. The weight 3 is urged in the axial direction, that is, in the direction in which the weight 3 comes out of the hole 23, by the repulsive force (restoring force) of the compressed disc spring 5.
However, since the C-ring 43 is inserted into the grooves 41 and 42 and the C-ring 43 is engaged with each of the main body 2 and the weight 3, the weight 3 is prevented from falling out of the hole 23.

The mounting and fixing of the weight 3 to the main body 2 are performed as follows.

As shown in FIG. 3, C
The ring 43 is mounted so that its inner peripheral portion 44 is inserted. At this time, the outer diameter of the C ring 43 is larger than the inner diameter of the hole 23.

Next, for example, by applying a stress in the direction indicated by the arrow in FIG. 6, the C-ring 43 is deformed so that its outer diameter becomes equal to the inner diameter of the hole 23, and in this state the weight 3 is removed. It is inserted into the hole 23. Prior to the insertion of the weight 3, the disc spring 5 is inserted into the hole 23,
It is arranged near 31.

The weight 3 is gradually inserted into the hole 23, and the C ring 43 is inserted into the groove 4 formed on the inner peripheral surface of the hole 23.
At the position 2, the C-ring 43 is restored by its elastic force (restoring force) to increase the outer diameter, and the outer peripheral portion 45 of the C-ring 43 is inserted into the groove 42. Thereby, as shown in FIG. 5, the C-ring 43
1 and 42, and the weight 3 is inserted into the hole 2
The shaft 3 is prevented from moving in the axial direction, and is prevented from coming off (separating) from the hole 23. That is, the weight 3 is
3 once loaded, that state is maintained.

When the C ring 43 is inserted into the grooves 41 and 42, the disc spring 5
1 and one end face 31 of the weight 3 are compressed into a substantially flat shape. The weight 3 is urged in a direction to come out of the hole 23 by the repulsive force (restoring force) of the compressed disc spring 5. Thus, a force acts on one inner surface of the groove 41 and the other inner surface of the groove 42 so as to compress the C-ring 43 in the thickness direction, and the inner surface of the groove 41 and the C-ring 43 and the groove are formed. A large frictional force is generated between the inner surface of the C-ring 41 and the C-ring 43. This frictional force prevents or suppresses rotation of the weight 3 with respect to the hole 23.

In the head 1 as described above, the center of gravity is located above the contact point between the hitting surface 21 and the golf ball, or such a state is created by various adjustments regarding the weight 3 described later. Is preferred. Thus, when the golf ball is hit with the hitting surface 21, the golf ball is driven (rotated in the rolling direction), and the rolling property of the golf ball is improved.

FIG. 7 is a partial sectional view showing another embodiment of the head of the present invention, and FIG. 8 is an end view of the weight shown in FIG. The head shown in FIG. 7 is different from the head 1 in the structure of the weight 6 and the structure of the mounting portions (two places) of the weight 6 with respect to the main body 2.

In the head shown in FIG. 7, a weight 6 is detachably mounted on the main body 2. That is, a female screw 232 is formed on the inner peripheral surface of the hole 23 formed in the main body 2,
On the other hand, on the outer peripheral surface of the weight 6, a male screw 61 screwed with the female screw 232 is formed. By inserting the weight 6 into the hole 23 and rotating in a predetermined direction, the weight 6
3 and fixed. In addition, the weight 6 can be removed from the hole portion 23 by rotating the weight 6 in the opposite direction.

As shown in FIG. 8, a straight groove 62 is formed at the end of the weight 6 on the side exposed from the hole 23, and a slotted screwdriver or a coin is inserted into the groove 62, for example. Then, the weight 6 is rotated.

In the structure shown in FIG.
By inserting a spacer (not shown) between the bottom surface 231 of the weight 6 and one end surface 63 of the weight 6, the hole 23 of the weight 6 is formed.
The insertion position of the weight 6 in the hole 23 can be adjusted by changing the insertion depth of the weight 6 into the hole 23. Thus, the position of the center of gravity of the entire head in the vertical direction with respect to the striking surface 21 can be adjusted.

FIGS. 9 and 10 are partial sectional views showing another embodiment of the head of the present invention. The head shown in FIG. 9 has a structure of the weight 7 and a weight 7 for the main body 2.
Are different from each other in the structure of the mounting portions (two locations).

In the head shown in FIGS. 9 and 10, the weight 7 is detachably mounted on the main body 2. In the main body 2,
A side hole 233 communicating with the hole 23 is formed.
A female screw is formed on the inner surface of 3. Further, a set screw (attachment member) 8 having a male screw formed on the outer periphery to be screwed with the female screw is screwed into the side hole 233. The set screw 8 corresponds to a mounting member for fixing the weight 7 to the hole 23.

On the other hand, a groove 71 is formed on the outer periphery of the weight 7 along the axial direction thereof. When the set screw 8 is screwed into the side hole 233 by rotating the set screw 8 by, for example, a flathead screwdriver, its tip abuts on the inner surface of the groove 71 and is crimped. Thereby, the frictional force between the outer peripheral surface of the weight 7 and the inner peripheral surface of the hole 23 increases, and the weight 7 is fixed to the hole 23. At this time, since the tip of the set screw 8 is inserted into the groove 71, the rotation of the weight 7 with respect to the hole 23 is also prevented.

When the set screw 8 is rotated in the opposite direction to be loosened, the weight 7 can move in the axial direction, and
3 can be removed.

Further, as shown in FIG. 10, the insertion depth of the weight 7 into the hole 23 is changed (shallower than that of FIG. 9), and the weight 7 is fixed by the set screw 8 in the same manner as described above. The axial fixing position with respect to the hole 23 can be adjusted steplessly. Thus, the position of the center of gravity of the entire head in the vertical direction with respect to the striking surface 21 can be adjusted.

In place of the groove 71, a plurality of holes (not shown) are formed in the outer peripheral surface of the weight 7 along the longitudinal direction, and the tip of the set screw 8 is inserted into a predetermined one of these holes. Such a configuration may be adopted. In this case, the axial fixing position of the weight 7 with respect to the hole 23 can be adjusted in multiple steps, but the fixed weight 7 is more reliably prevented from shifting in the axial direction.

FIG. 11 is a partial sectional view showing another embodiment of the head of the present invention, and FIG. 12 is an end view of the weight shown in FIG. The head shown in FIG. 11 is different from the head 1 in the structure of the weight 9 and the structure of the mounting portion (two places) of the weight 9 to the main body 2.

The head shown in FIG. 11 can change the weight of the weight 9 or the position of the center of gravity.

The weight 9 is a weight body 9 having a hollow portion 90.
1 and a substantially cylindrical lid 92 for shielding one end opening of the hollow portion. The weight main body 91 is fixed to the hole 23 by the same weight fixing mechanism 4 and disc spring 5 as described above.

A female screw is formed on the inner peripheral surface of one end of the weight main body 91, and a male screw is formed on the outer peripheral surface of the lid 92 to be screwed with the female screw. It is attached to and detached from the weight main body 91.

As shown in FIG. 12, a one-shaped groove 93 is formed in the cover 92, and a slotted screwdriver or a coin is inserted into the groove 93 to rotate the cover 92, that is, the cover 92 The opening and closing operation of the hollow portion 90 is performed.

Now, in such a weight 9, the hollow portion 90
Then, various fillers (not shown) having different specific gravities are selected and inserted and stored. The weight, specific gravity, and position of the center of gravity of the entire weight 9 can be appropriately set according to the specific gravity, the filling amount, and the like of the filler stored in the hollow portion 90, whereby the position of the center of gravity of the entire head in the vertical direction with respect to the striking surface 21 can be determined. Can be adjusted.

The form of the filler may be either solid or liquid. In the case of solid fillers, for example, powders,
Granules, small lumps, rods and the like can be used. Examples of the constituent material of the filler include various metals, stones, ceramics, and synthetic resins.

As shown in FIG. 13, the hollow portion 90 has a structure in which a block-shaped (small-sized) first filler 94a and a second filler 94b having different specific gravities and / or weights are housed. You can also.

In the case of this embodiment, the first filler 94a is
The specific gravity and the volume are larger than the second filler 94b.

Then, as shown in FIG. 14, the first filler 94a and the second filler 94b can be housed in the hollow portion 90 with the positional relationship reversed. Thereby, the position of the center of gravity of the entire weight 9 can be moved in a direction away from the hitting surface 21. Further, the first filler 94a and the second
The filler 94b can be appropriately replaced with a material having a different specific gravity, size, shape and the like.

With the configuration shown in FIGS. 13 and 14, the position of the center of gravity of the entire head in the vertical direction with respect to the striking surface 21 can be adjusted in multiple steps.

Further, as shown in FIG. 15, the hollow portion 90 may be configured such that rod-shaped first fillers 95a and second fillers 95b having different specific gravities and / or weights are arranged side by side. .

In the case of the present embodiment, the shape and volume of the first filler 95a and the second filler 95b are the same,
The first filler 95a has a higher specific gravity than the second filler 95b.

Then, as shown in FIG. 16, the first filler 95a and the second filler 95b can be stored in the hollow portion 90 with the positional relationship reversed. In addition, in the state shown in FIG. 15 or FIG. 16, the first filler 95a and the second filler 95b are rotated left or right around the axis of the hollow portion 90, for example, 90 °, 60 ° or 45 °. °
It can be rotated and loaded. By the movement of both fillers 95a and 95b, the position of the center of gravity of the entire weight 9 can be moved in a direction (two-dimensional direction) parallel to the hitting surface 21.

Further, the first filler 95a and the second filler 95b can be appropriately replaced and used with different specific gravities, sizes, shapes and the like.

The claw (locking portion) 951 formed at the end of the first filling material 95a and the second filling material 95b is fitted to the bottom of the hollow portion 90 to be loaded. The rotation of the first filler 95a and the second filler 95b with respect to the weight body 91 is prevented.

With the configuration shown in FIGS. 15 and 16, the position of the center of gravity of the entire head in the direction parallel to the hitting surface 21 can be adjusted.

FIGS. 17 and 18 are partial sectional views showing another embodiment of the head of the present invention. In the heads shown in these figures, the structure of the weight 9 is further different from that described above.

In the head shown in FIG. 17, the weight 9 of the weight 9 or the position of the center of gravity can be changed. That is, the weight body 91
A female screw 96 is formed on the inner peripheral surface of the hollow portion 90, while a male screw 98 screwed with the female screw 96 is formed on the outer peripheral surface of the moving body 97. In addition, a groove 99 having a one-character shape is formed on an end surface of the moving body 97.

When the moving body 97 is rotated in a predetermined direction with respect to the weight body 91 by inserting, for example, the tip of a flathead screwdriver into the groove 99, the moving body 97 is screwed into the female screw 96 and the male screw 98, It moves in the hollow portion 90 in the axial direction according to the rotation direction and the rotation amount.

Thus, the position of the center of gravity of the entire weight 9 can be changed, and the position of the center of gravity of the entire head in the vertical direction with respect to the striking surface 21 can be adjusted steplessly. In addition, such adjustment is performed by setting the position of the moving body 97 in the axial direction by rotating the moving body 97, so that the operation is extremely easy.

In the configuration shown in FIG. 17, for example, a coil-shaped spring (biasing member) (not shown) is installed between the bottom surface of the hollow portion 90 and the end surface of the moving body 97 to move the moving body 9.
It is also possible to adopt a configuration that urges 7 in a direction away from the striking surface 21. Thereby, the mounting stability of the moving body 97 to the weight main body 91 is improved.

Further, two or more same or different moving bodies can be installed. That is, in the embodiment shown in FIG. 18, the first moving body 97 is provided in the hollow portion 90 of the weight main body 91.
a and the second moving body 97b are screwed. In this case, the first moving body 97a has a larger specific gravity and a larger volume than the second moving body 97b.

Further, the first mobile unit 97a and the second mobile unit 97b can be screwed into the hollow portion 90 with the positional relationship reversed, and one of the two mobile units 97a and 97b can be inserted. Only one may be screwed into the hollow portion 90.

According to such a configuration, the weight and the position of the center of gravity of the entire weight 9 can be changed, and the hitting surface 2 of the entire head can be changed.
The position of the center of gravity in the vertical direction with respect to 1 can be adjusted steplessly. In addition, such adjustment is performed by the moving bodies 97a, 97
The operation is extremely easy because the selection is made by selecting 7b and setting their axial positions.

Further, the head of the present invention may be a combination of the structures in the above embodiments as appropriate. For example, the weights 3 and 9 may be fixed to the main body 2 by the structure shown in FIG. 7 or FIG.

Next, the constituent materials of each part in each of the above-described heads will be described.

The main body 2 (including the connecting portion 25 when it is integrally formed) can be made of various metal materials, but is particularly made of Ti or an alloy containing Ti (Ti alloy). Is preferred.

[0086] Ti or Ti alloy is lightweight, has high strength and high hardness, has a high repulsive force when hitting a ball with the hitting surface 21, is hardly deformed or damaged, and has excellent durability and corrosion resistance. There is an advantage that.

In the case of a Ti alloy, the content of Ti in the alloy is not particularly limited, but is preferably at least 50 wt%, more preferably at least 65 wt%.

Elements other than Ti constituting the Ti alloy include, for example, Fe, Co, Ni, Cr, Pd, Zr, A
1, V, Mo, Cu, Ag, Au, W, Sn, Mn, S
i, Ta, Nb and the like, and one or more of these can be contained. These are added according to various purposes, for example, adjustment of physical properties such as strength (rigidity), hardness, elasticity (toughness), improvement of chemical properties such as improvement of corrosion resistance, improvement of manufacturing conditions, and the like. The amount is determined appropriately. For example, when the main body 2 is manufactured by a powder metallurgy method, particularly, a metal powder injection molding method described later, Fe, Co,
Addition of Ni, Al, Pd, Mn, Cu, Ag and the like has an effect of lowering the sintering temperature.

In the Ti or Ti alloy, C, O,
N or the like may be positively or inevitably included.
These contents are preferably C: 0.01 to 0.8 wt.
%, O: 0.02 to 1.0% by weight, N: 0.01 to 0.9%
wt%.

The total content of C, O and N is
It is preferably about 0.06 to 2.5 wt%,
More preferably, it is about 1.5 wt%.

If the respective contents or the total contents of C, O and N are too small, the strength of the metal material constituting the main body 2 is reduced depending on the basic composition. If the contents are too large, the ductility of the metal material is reduced. Shows a tendency to decrease.

The hardness of the striking face 21 of the main body 2 is not particularly limited, but the Vickers hardness Hv is preferably about 180 to 400, and more preferably about 250 to 380. With such hardness, the above-described effects are more effectively exhibited.

The porosity of the pores of the metal material constituting the main body 2 is preferably 5.0 vol% or less,
More preferably, it is about 5 to 3.5 vol%. If the porosity is too high, the mechanical properties of the metal material, particularly the strength and ductility (toughness), may decrease, and the corrosion resistance may also decrease.

The specific gravity of the weights 3, 6, 7, and 9 is preferably larger than the specific gravity of the main body, and is 1.1 to 4.
More preferably, it is about 5 times. Thus, the center of gravity of the entire head can be set or adjusted effectively.

The materials constituting the weights 3, 6, and 7 include:
Various metal materials are suitably used, and W (tungsten) or an alloy mainly containing W is particularly preferable. As for the weight 9, the weight main body 91, the lid 92, the filler 94a,
94b, 95a, 95b, moving bodies 97, 97a, 97b
It is preferable that at least one of them is made of W or an alloy mainly containing W.

[0096] Examples of other metal materials constituting the weight include carbon steel and stainless steel. These can be used in combination with the above-mentioned W or an alloy mainly containing W.

Examples of the material forming the C ring 43 include stainless steel and phosphor bronze.

As a material for forming the disc spring 5, for example, stainless steel, phosphor bronze or the like can be used.

The method of manufacturing the main body 2 as described above is not particularly limited. For example, a casting method, a powder metallurgy method,
Any material, such as shaving, may be used, but one manufactured by powder metallurgy is preferable, and particularly, one manufactured by metal injection molding (MIM) is more preferable. Hereinafter, the metal powder injection molding method will be described.

[1] A metal powder of the metal constituting the main body 2 (for example, the above-mentioned Ti or Ti alloy) and a binder (organic binder) are prepared, and these are kneaded by a kneader to obtain a kneaded product (compound). .

The average particle size of the metal powder is not particularly limited, but is usually preferably about 5 to 75 μm, more preferably 10 to 50 μm.
m is more preferable.

On the other hand, examples of the binder include polyolefins such as polyethylene, polypropylene and ethylene-vinyl acetate copolymer, acrylic resins such as polymethyl methacrylate and polybutyl methacrylate, styrene resins such as polystyrene, and polyvinyl chloride. One or two or more of various thermoplastic resins such as polyamide, polyester, polyether, or a copolymer thereof, various waxes, paraffin, and the like can be used.

The amount of the binder added is 3 to 20 wt.
%, Preferably about 4 to 13% by weight.
If the added amount of the binder is too small, the fluidity during molding becomes poor, and injection molding becomes impossible or difficult, or the composition of the molded product becomes non-uniform, and if it is too large, it is obtained by injection molding. When the molded body is fired, the shrinkage tends to increase, the dimensional accuracy decreases, and the porosity and C content tend to increase.

When kneading, various additives such as a plasticizer, a lubricant, an antioxidant, a degreasing accelerator, a surfactant and the like may be added as necessary in addition to the metal powder and the binder. Can be.

As an example of the kneading conditions, the kneading temperature can be from ordinary temperature to about 150 ° C., and the kneading time can be about 60 to 180 minutes.

[2] Using the kneaded material obtained in the step [1] or pellets granulated from the kneaded material, etc.,
Injection molding is performed by an injection molding machine to produce a molded body having the shape of the main body 2. The dimensions of the molded body, particularly the inner diameter of the hole 23, are determined in consideration of shrinkage due to later firing.

At this time, as the molding conditions, for example, the material temperature is preferably 130 to 170 ° C., more preferably about 150 to 160 ° C., and the injection pressure is 300 to 600 kg.
The mold temperature is about f / cm ² , more preferably about 300 to 400 kgf / cm ² , and the mold temperature is preferably 5 to 50 ° C., and more preferably about 10 to 20 ° C.

[3] The molded body obtained in the step [2] is subjected to a binder removal treatment. This binder removal treatment is performed by performing a heat treatment in a non-oxidizing atmosphere, for example, in a vacuum or reduced pressure state (for example, 1 × 10 ⁻¹ to 1 × 10 ⁻⁶ Torr).

In this case, the heat treatment is preferably performed at a temperature of about 50 to 650 ° C. for about 8 to 72 hours, more preferably at a temperature of about 60 to 550 ° C. for about 12 to 18 hours.

The binder removal treatment (degreasing treatment)
May be carried out by eluting a specific component in the binder using a predetermined solvent (liquid or gas).

This step [3] may be omitted.

[4] Next, the obtained molded body is fired to produce a metal sintered body. The firing can be performed once or twice or more.

The firing conditions are appropriately determined according to the metal composition and the like. In the case of the aforementioned Ti or Ti alloy, the temperature is preferably about 400 to 1400 ° C. for about 10 to 26 hours, more preferably 500 to 1350 ° C. About 15-18
It is about time. In this case, the firing atmosphere is a non-oxidizing atmosphere, that is, a vacuum or reduced pressure state (for example, 1 × 10
⁻² to 1 × 10 ⁻⁶ Torr), in an inert gas such as an argon gas or a nitrogen gas, or in any other reducing atmosphere.

[5] If necessary, polishing, etching, wet plating, vapor deposition, ion plating, or the like, such as shot blasting and honing, may be applied to the surface of the obtained metal sintered body.
A surface treatment such as sputtering, CVD, or thermal spraying is performed.

Through the above steps, the main body 2 made of the sintered metal is obtained.

When the main body 2 is formed by a casting method,
Embrittlement due to oxygen, nitrogen, etc. reacting during casting, casting defects,
Although it is necessary to overcome problems such as hot water flow, according to the metal powder injection molding method, there is no such problem,
Even if the shape is complicated and fine, it can be integrally molded, high strength and high quality can be manufactured easily and with good yield, and dimensional accuracy, especially dimensional accuracy of the inner diameter of the hole 23 Is also expensive.

Further, by adjusting the type and amount of the binder, the amount of addition, the conditions of the binder removal treatment, the firing conditions, and the like, the composition of the metal material constituting the main body 2 and the conditions relating to the pores such as the pore diameter and the porosity are adjusted. There is also an advantage that it can be set as desired.

The weights 3, 6, 7, and 9 (or their components) may be similarly manufactured by a metal powder injection molding method.

In the head as described above, the same or different weights (weights 3, 6, 7, 9) can be attached to the pair of holes 23 formed on the back side of the hitting surface 2. it can. In addition, various weights 6 and 7 having different weights and specific gravities are installed in one or both of the two hole portions 23 so as to be position-adjustable or replaceable, or the weights and the center of gravity can be changed. 9 etc. can be attached. Thereby, the weight and the position of the center of gravity (balance) of the head can be adjusted in an arbitrary direction (one-dimensional, two-dimensional, or three-dimensional direction).

The golf club of the present invention has the above-described head mounted on the tip of the shaft 10. A grip (not shown) is provided at the base end of the shaft 10.
Are formed.

The golf club head and golf club of the present invention have been described with reference to the illustrated embodiments.
The present invention is not limited to these.

For example, the cross-sectional shapes of the weights 3, 6, 7, 9 (or their components) are not limited to circles,
For example, the shape may be any shape such as a sector such as a semicircle, a polygon such as an ellipse, a triangle, a quadrangle, and a hexagon. Weights 3, 6, 7, 9 etc. whose cross-sectional shape changes on the way (for example, those whose diameter is reduced or expanded on the way)
It may be. Further, the weights 3, 6, 7, 9 and the like are not limited to rod-shaped ones. The same applies to the shape of the hole (recess) 23.

In the configuration shown, the weights 3, 6, 7,
The installation direction such as 9 is substantially perpendicular to the striking surface 21, but is not limited thereto, and may be, for example, a direction parallel to the striking surface 21 or a direction inclined at a predetermined angle with respect to the direction. .

The number and locations of the weights are not limited to those shown in the drawings. For example, the number of weights may be one or three or more.

Further, the shape and structure of the main body 2 are not limited to those shown in the figure. For example, the main body 2 may have a hollow portion. Further, the structure of the weight fixing mechanism 4 is not limited to those of the above-described embodiments.

In the present invention, the golf club
The present invention is not limited to the putter described above, and can be applied to other types such as drivers, fairway woods, and irons.

[0127]

As described above, according to the present invention, the weight of the head and the position of the center of gravity can be set and adjusted by the weight, and the weight does not fall off.

In addition, since the weight is fixed via the engaging member, particularly the engaging member whose outer dimensions are variable, in the concave portion, the structure is simple, the number of parts is small, and the mounting operation of the weight is easy. It is. And the weight is more reliably fixed by installing the urging member.

Further, according to the present invention, the weight can be installed detachably, its own weight or the position of its center of gravity can be changed, or its fixed position with respect to the main body can be adjusted. The position and balance of the center of gravity of the head can be easily adjusted and set according to the user's preference, and the degree of freedom of the adjustment is large. In particular, in a case where a plurality of different weights can be exchangeably loaded, the effect is more remarkably exhibited.

When a pair of weights are attached to both ends of the hitting surface of the main body, the head can be easily balanced, and particularly, the center of gravity can be easily set near the center, and the impact force can be effectively applied to the golf ball. Can be transmitted.

When the main body is manufactured by a metal powder injection molding method, a complicated shape can be easily and integrally formed, and a high-strength, high-quality one can be easily formed with a good yield. It can be manufactured, and the dimensional accuracy of each part, particularly the dimensional accuracy of the inner diameter of the concave portion (hole) for mounting the weight is high.

[Brief description of the drawings]

FIG. 1 is a front view showing an embodiment of a golf club head according to the present invention.

FIG. 2 is a rear view showing an embodiment of the head of the golf club of the present invention.

FIG. 3 is a plan view showing an embodiment of a golf club head according to the present invention.

FIG. 4 is a right side view showing an embodiment of the golf club head of the present invention.

FIG. 5 is a cross-sectional view illustrating a configuration of a weight and a mounting portion of the weight.

FIG. 6 is a front view showing a configuration of an engagement member.

FIG. 7 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 8 is an end view of the weight shown in FIG. 7;

FIG. 9 is a cross-sectional view illustrating a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 10 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 11 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 12 is an end view of the weight shown in FIG. 11;

FIG. 13 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 14 is a cross-sectional view illustrating a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 15 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 16 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 17 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

FIG. 18 is a cross-sectional view showing a configuration of a weight and a weight mounting portion according to another embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 1 head 2 main body 21 hitting surface 22 concave portion 23 hole portion 231 bottom surface 232 female screw 233 side hole 24 mark 25 connecting portion 26 hole 3 weight 31 one end surface 4 weight fixing mechanism 41, 42 groove 43 C ring 44 inner peripheral portion 45 outer peripheral portion Reference Signs List 5 disc spring 6 weight 61 male screw 62 groove 63 one end face 7 weight 71 groove 8 set screw 9 weight 90 hollow portion 91 weight body 92 lid 93 groove 94a, 94b filler 95a, 95b filler 951 claw 96 female screw 97 moving body 97a, 97b Moving body 98 Male screw 99 Groove 10 Shaft

Claims (21)

[Claims] A metal body having a hitting surface of a golf ball, and at least one weight attached to the body, wherein the weight is inserted into a recess formed in the body;
A golf club head, wherein the weight fixing mechanism provided in the recess prevents the detachment from the recess. 2. The golf club head according to claim 1, wherein the weight fixing mechanism includes an engaging member installed in the concave portion and engaging with each of the main body and the weight. 3. The engaging member is deformable so as to increase or decrease its outer dimension. 3. The golf club head according to claim 2, wherein the head is inserted to prevent the weight from moving in the axial direction with respect to the recess. 4. The golf club head according to claim 2, wherein the engagement member is a ring-shaped elastically deformable member having a part missing in a circumferential direction. 5. The golf club according to claim 2, wherein an urging member for urging the weight against the main body and / or the engaging member is provided in the recess. head. 6. A metal body having a hitting surface of a golf ball, and at least one weight attached to the body, wherein the weight is inserted into a recess formed in the body,
A golf club head, which is detachably installed in the recess. 7. The golf club head according to claim 6, wherein the weight is fixed to the recess by screwing. 8. The golf club head according to claim 6, wherein the weight is fixed to the recess by a mounting member. 9. A golf club comprising a metal body having a hitting surface of a golf ball, and at least one weight attached to the body, wherein the weight is capable of changing its own weight or the position of the center of gravity. A golf club head comprising: 10. The weight has a hollow portion, and its own weight or the position of the center of gravity can be changed by selectively inserting an object having a different weight into the hollow portion.
A golf club head according to claim 1. 11. The weight has a weight body and a movable body movable with respect to the weight body, and the position of the center of gravity can be changed by adjusting the position of the movable body with respect to the weight body. The golf club head according to claim 9. 12. The golf club head according to claim 6, wherein a fixed position of the weight with respect to the main body can be adjusted. 13. The golf club head according to claim 1, wherein a pair of weights are mounted on both ends of the hitting surface of the main body. 14. A golf club head having a metal main body having a hitting surface of a golf ball, and having concave portions into which weights can be attached near both ends of the hitting surface of the main body. A golf club head comprising a weight fixing mechanism for maintaining the state of the weight once loaded into at least one of the concave portions. 15. A golf club head having a metal main body having a hitting surface of a golf ball, and having concave portions into which weights can be attached near both ends of the hitting surface of the main body. And a plurality of different weights can be exchangeably loaded into at least one of the two concave portions. 16. The golf club head according to claim 1, wherein the weight has a rod shape. 17. The golf club head according to claim 1, wherein a specific gravity of the weight is larger than a specific gravity of the main body. 18. The golf club head according to claim 1, wherein the main body is made of Ti or an alloy containing Ti. 19. The golf club head according to claim 1, wherein the main body is manufactured by a metal powder injection molding method. 20. The golf club head according to claim 1, which is a putter head. 21. The shaft according to claim 1, wherein the shaft has a tip.
A golf club comprising the golf club head according to any one of the above.