JP2001238988A - Golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club which makes regulation of the spin characteristics of a ball regulatable and is consequently easily usable for various types of golfers. SOLUTION: The golf club, which has a face plate 2 having a clubface for hitting the ball, a shell 3 disposed with the face plate 2 at its front and a head forming a hollow section in the inside thereof, is provided with a reinforcing plate 5 in a position apart from the face plate 2 within a hollow part 4 along the specific area of the face plate 2. The distance formed by this reinforcing plate 5 and the face plate 2 is set at a distance at which the face plate deformed by the impact of the ball abuts on the reinforcing plate. The reinforcing plate 5 is otherwise disposed in the position apart from the face plate 2 within the hollow part 4 along the face plate 2 and the distance formed by the reinforcing plate 5 and the face plate 2 is made successively longer from the specific area of the face plate 2 toward the other area and is set at the distance at which the face plate deformed by the hitting of the ball can abut on the reinforcing plate 5 in the shortest segment.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club provided with a head having a hollow structure, in which the deformation of a face plate is locally controlled to adjust the spin characteristics of the ball.

[0002]

2. Description of the Related Art The material of golf club heads has evolved with the times, from traditional wooden heads to FRP heads and metal heads. With the evolution of such materials, golf clubs that are easier to hit and have increased flight distance have been provided.

[0003] Since the modern 1990, metal heads have been the mainstream, and among the metal heads, the heads have evolved from stainless steel heads and aluminum alloy heads to titanium alloy heads. Especially recent 1995
From around the year, titanium alloy heads have become mainstream.
Since the titanium alloy head can have a larger head volume than a stainless steel head or the like with the same mass, the sweet spot is wide and easier to hit, and the flying distance can be further increased.

[0004] However, there are golfers of a type which does not produce sufficiently good results even when such a metal head is used. Also, among metal heads, there are golfers of the type in which the results are rather poor with titanium alloy heads.

[0005] A phenomenon that is often seen in golfers of a type that does not produce good results even when a metal head is used is good when hit at a sweet spot, but large when the sweet spot is removed. The degree of bending or stall is large.
In particular, in the case of a titanium alloy head or the like, although a sweet spot is wide, depending on the type of golfer, if the sweet spot is removed, a particularly inconsistent phenomenon occurs that a particularly bad result is obtained. In order to elucidate such a phenomenon, the present inventors paid attention to the spin of the ball given at the time of hitting.

A well-known spin of a ball given when hit is a gear effect. The gear effect is a phenomenon in which when a sweet spot is removed, a force giving spin to the ball acts. The gear effect will be described in detail below with a specific example.

When the head (1) is hit with the toe portion (20) as shown in FIG. 109, the head (1) rotates around the center of gravity G as shown by an arrow (201), and When the ball is in contact with the head (1), an arrow (20)
It receives a spin force as shown in 2).

Further, as shown in FIG. 109, the head (1)
When the ball is hit with the heel portion (30), the head (1) rotates around the center of gravity G as shown by the arrow (301), and the ball at the time of the hit hits the arrow (301) during contact with the head (1). It receives a spin force as shown in (302).

[0009] Further, as shown in FIG.
When hit at the upper part (40) of the head, the head (1)
Around the center as shown by the arrow (401),
When the ball is hit, the ball (4) is in contact with the head (1).
02).

Further, as shown in FIG. 110, the head (1)
When hit with the lower part (50) of the head, the head (1)
Around the center as shown by the arrow (501),
When the ball is hit, the ball (5) is in contact with the head (1).
02).

In the above description, the directions of the rotational force received by the gear effect when hitting at the toe portion, the heel portion, the upper portion, and the lower portion deviating from the sweet spot are shown. If you take off and hit,
The spin force is obtained by combining the above arrows. That is, when the sweet spot is removed from the upper part of the toe portion and hit, the spin force is applied in a direction in which the arrow (202) and the arrow (402) are combined.

By the way, the spin force received by the gear effect is a relative one. In FIG. 109, when the ball is hit with the toe (20), the spin is always in the direction of the arrow (202). is not. This means that it receives a spin force in the direction of the arrow (202).

The spin in the directions of arrows (202) and (203) in FIG. 109 is called side spin,
In a right-handed golf club, spin in the direction of arrow (202) is called hook spin, and spin in the direction of arrow (203) is called slice spin. In FIG. 109, when hitting with the toe portion (20), the tendency for hook spin is increased, and when hitting with the heel portion (30), the tendency for slice spin is increased.

On the other hand, the cause of the hook spin and the slice spin is largely caused by the golfer, together with the characteristics of the golf club. Golfers with hook spins
This means that there are types such as golfers who tend to have a slice spin. This is a golfer's type (habit) that is generally referred to as a golfer's "holding ball".

For example, if a golfer with a slight hook spin hits the heel portion (30), it does not necessarily result in a hit of a slice spin, but if a golfer originally having a strong hook spin tendency hits with the heel portion (30). However, it is possible that the hook spin becomes weaker. This is a case where the golfer has a stronger hook spin tendency than the slice spin tendency obtained by the gear effect. Of course, if such a golfer hits the toe (20), the hit ball will have a stronger hook spin.

Further, in FIG. 110, when the ball is hit at the upper part (40), the spin does not always become the direction of the arrow (402). Arrow (402)
In this direction.

Actually, at the time of a normal hit, a back spin, that is, a spin in the direction of an arrow (502) shown in FIG. 110 is applied depending on the loft angle of the head.

Therefore, to make the expression more understandable, in FIG. 110, when hitting at the upper part (40),
Backspin tends to decrease, and hitting at the lower part (50) tends to increase backspin.

The above is the general description of the gear effect. The gear effect of the metal hollow structure head will be further described. It is known that the face plate of the hollow head made of metal is slightly deformed when struck because the face is plate-shaped.

The inventors of the present invention have found that if the deformation of the face plate is large, the contact time between the face plate and the ball is long, so that the gear effect is large. If the deformation of the face plate is small, the contact time between the face and the ball is short. I discovered that the gear effect became smaller.

Conventionally, it has been widely accepted that a gear effect is small in a head having a large sweet spot, that is, a large so-called moment of inertia, and a metal hollow structure having a large moment of inertia as compared with a conventional wooden head. At the head, gear effects were often neglected. However, it has been found that in the metal hollow structure head in which the face plate is deformed, the gear effect is not negligible.

Certainly, the initial metal head had a thick face plate, and the face plate was hardly deformed at the time of hitting, so it may be good to ignore the gear effect. However, in recent metal heads, the thickness of the face plate is small, and the face plate is greatly deformed when struck. In other words,
The gear effect has reappeared.

With the gear effect as described above,
In the example shown in FIG. 109, when a golfer who is slightly hooked and spins at the toe portion (20), it is conceivable that a miss shot that bends greatly due to the hook spin may occur. In addition, as shown in FIG. 110, when a golfer having a small back spin amount of the hit ball hits the upper part (40), the back spin amount is very small, and the ball stalls without obtaining the lift of the ball. In other words, it is conceivable that a miss shot that does not have a sufficient flight distance occurs.

[0024]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a golf club having a hollow-structured head, which makes it possible to adjust the spin characteristics of the ball, thereby making the golf club easy to use for various types of golfers. Is to provide.

[0025]

According to the present invention, there is provided a golf club having a face plate having a face for hitting a ball, and an outer shell having the face plate disposed on a front surface thereof. A golf club having a head that forms a hollow portion inside, and a reinforcing plate is provided at a position apart from the face plate in the hollow portion along a specific portion of the face plate, and the reinforcing plate The distance between the face plate and the face plate is set so that the face plate deformed by hitting the ball can contact the reinforcing plate.

According to another aspect of the present invention, there is provided a golf club having a face plate having a face for hitting a ball, and an outer shell having the face plate disposed on a front surface thereof. A golf club provided with a head that forms a hollow portion therein, wherein a reinforcing plate is provided along the face plate at a position away from the face plate in the hollow portion,
The distance between the reinforcing plate and the face plate was sequentially increased from a specific portion of the face plate to another portion, and the shortest portion was set to a distance at which the face plate deformed by hitting the ball could contact the reinforcing plate. It is characterized by the following.

As described above, the reinforcing plate is provided along a specific portion of the face plate, or the distance between the reinforcing plate provided along the face plate and the face plate is changed from the specific portion of the face plate to another portion. By sequentially increasing the length, the deformation of the face plate at the time of hitting is partially suppressed, so that the gear effect when the ball is hit at a specific portion of the face plate can be reduced. Therefore, the spin characteristics of the ball can be adjusted according to the setting of the reinforcing plate, whereby a golf club that is easy to use for various types of golfers can be provided.

When the present invention is more specifically classified, the following eight types of golf clubs can be constructed.

A first golf club according to the present invention has a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and a head having a hollow portion formed therein. A golf club with
A reinforcing plate is provided only along the upper portion of the face plate, at a position away from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is changed by the impact of a ball on the reinforcing plate. It is characterized in that it is set to a distance that can be abutted.

A second golf club according to the present invention is a head having a face plate having a face for hitting a ball, an outer shell having the face plate disposed on the front surface, and having a hollow portion formed therein. A golf club with
Along the face plate, a reinforcing plate is provided at a position distant from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the upper portion to the lower portion of the face plate. The distance is set so that the face plate deformed by hitting the ball can contact the reinforcing plate.

A third golf club according to the present invention has a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and a head having a hollow portion formed therein. A golf club with
A reinforcing plate is provided only along the lower portion of the face plate, at a position away from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is changed by the impact of the ball on the reinforcing plate. It is characterized in that it is set to a distance that can be abutted.

A fourth golf club according to the present invention has a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and a head having a hollow portion formed therein. A golf club with
Along the face plate, a reinforcing plate is provided at a position away from the face plate in the hollow portion, and a distance between the reinforcing plate and the face plate is sequentially increased from a lower portion to an upper portion of the face plate. The distance is set so that the face plate deformed by hitting the ball can contact the reinforcing plate.

A fifth golf club according to the present invention has a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and a head having a hollow portion formed therein. A golf club with
A reinforcing plate is provided only along the heel portion of the face plate, at a position apart from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is changed by the impact of the ball. The distance is set so as to be able to come into contact with.

A sixth golf club according to the present invention has a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and having a hollow portion formed therein. A golf club with
Along the face plate, a reinforcing plate is provided at a position distant from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the heel portion of the face plate to the toe portion, and the shortest. In the portion, the distance is set so that the face plate deformed by hitting the ball can contact the reinforcing plate.

A seventh golf club according to the present invention is a head having a face plate having a face for hitting a ball, an outer shell having the face plate disposed on the front surface, and having a hollow portion formed therein. A golf club with
A reinforcing plate is provided along the toe portion of the face plate only at a position away from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is changed by the impact of the ball. The distance is set so as to be able to come into contact with.

An eighth golf club according to the present invention is a head having a face plate having a face for hitting a ball, an outer shell having the face plate disposed on the front surface, and having a hollow portion formed therein. A golf club with
Along the face plate, a reinforcing plate is provided at a position distant from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the toe portion to the heel portion of the face plate, and is the shortest. In the portion, the distance is set so that the face plate deformed by hitting the ball can contact the reinforcing plate.

[0037]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First Embodiment of Golf Club According to the Present Invention
An embodiment will be described with reference to the drawings. FIG. 1 is a plan view of a head according to the present invention, and FIG. 2 is a sectional view taken along line AA of FIG.
The head (1) of the present embodiment has a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and a hollow inside. A portion (4) is formed, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow portion (4).

In this embodiment, the reinforcing plate (5) is arranged only on the upper face, and the distance D1 between the face plate (2) and the reinforcing plate (5) is changed by the face plate deformed by hitting the ball. Is set to a distance that can abut the.

The distance D1 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting. As shown in FIG. 3, the face plate (ball is not shown) deformed by hitting the upper part of the face (ball is not shown). Since 2) comes into contact with the reinforcing plate (5), the deformation amount d1 is suppressed based on the distance D1.

According to the golf club described above, when the golf club is hit at the upper portion of the face, the gear effect is reduced due to the small deformation of the face plate. On the other hand, when the ball is hit at the lower part of the face, there is no reinforcing plate for suppressing the deformation of the face plate, and the gear effect is larger than that at the time of hitting the ball at the upper part of the face. Then, the decrease in the backspin amount when hitting the ball at the upper part of the face is suppressed, and the increase of the backspin amount when hitting the ball at the lower part of the face is sufficiently obtained. That is, a golf club having an increased backspin amount on average is obtained.

The distance between the reinforcing plate and the face plate in the present invention may be any distance as long as the face plate deformed by hitting can contact the reinforcing plate, and need not always be constant. In addition to the reinforcing plate parallel to the rounded face plate as shown in FIG. 2, the reinforcing plate is flat as shown in FIG. 4, and the reinforcing plate and the face plate as shown in FIG. The distance between the reinforcing plate and the face plate may be narrower from the upper face to the center of the face, or may be wider from the upper face to the center of the face as shown in FIG. That is,
2, 4, 5, and 6 are all included in the present invention.

As the face plate in the present invention, a flat face plate as shown in FIG. 7 is included in the present invention in addition to the round face plate as described above. The distance between the face plate and the reinforcing plate in the present invention may be any distance at which the face plate deformed by the impact can contact the reinforcing plate, and need not always be constant. In addition to the arrangement of the reinforcing plate parallel to the flat face plate as shown in FIG.
The distance between the reinforcing plate and the face plate decreases from the upper part of the face to the center of the face as shown in FIG. 9, or the distance between the reinforcing plate and the face plate decreases from the upper part of the face to the center of the face as shown in FIG. It may be widespread. That is, all of FIGS. 7, 8 and 9 are included in the present invention.

As shown in FIG. 10, the upper part of the face in the present invention has a head in which the gap formed between the toe part and the heel part and the horizontal plane generated by the sole round is the same for the toe part and the heel part. In other words, in a front view in a state of being placed on a horizontal plane according to the lie angle, the xy coordinates such that the x axis contacts the sole portion of the head and the y axis contacts the most protruding position of the toe portion. When set, the range is between two straight lines y = 0.5H and y = H. Here, H is the height of the head in the y-axis direction. In at least one position within the above range, the distance between the face plate and the reinforcing plate may be set to a distance at which the face plate deformed by the impact can contact the reinforcing plate.

The reinforcing plate is shown in FIG. 2, FIG. 4, FIG. 5, FIG.
8 and 9, it is preferable that the outer shell is fixed to the upper side of the outer shell. However, as shown in FIG. Is included. By the way, in order to make the form shown in FIG. 11 easy to understand, a state in which the face plate is removed in a front view is illustrated. As shown in FIG. 12, the reinforcing plate (5) is attached to the heel portion and the toe portion of the outer shell (3). It turns out that it is fixed.

In the first embodiment, as shown in FIG. 13, when the head is placed on a horizontal plane at the lie angle so that the x-axis is in contact with the sole portion of the head,
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, x = 0.1L and x = 0.9L
Range between straight lines, preferably x = 0.2L and x = 0.8
A reinforcing plate may be provided at least at one position within the range between the two straight lines L along the upper face only. They are,
BB by a cut perpendicular to a line segment R corresponding to a leading edge generally referred to as shown in FIG.
Judgment is made based on the cross section. In at least one BB cross section within the above range, a reinforcing plate may be provided only along the upper face. Here, L is the width of the head in the x-axis direction, and the width L is the distance from the position where the toe portion most protrudes to the position where the distance between the horizontal surface and the sole portion on the heel side is 16 mm.

A golf club having a head as described above has a low backspin amount of a hit ball as seen, for example, in a golfer of a type having a relatively low head speed or a golfer who does not use a wrist much during a swing. Suitable for small golfers.

Next, a second embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 15 is a cross-sectional view of the head according to the present invention (a cross-sectional view along AA in FIG. 1). The head (1) of the present embodiment has a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and a hollow inside. A portion (4) is formed, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow portion (4).

In this embodiment, the distance between the face plate (2) and the reinforcing plate (5) is changed from the distance D2 between the face plate (2) and the reinforcing plate (5) at the upper part of the face to the face plate at the lower part of the face. The length is gradually increased over a distance D3 between (2) and the reinforcing plate (5).

The distance D2 is equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting, and as shown in FIG. 16, the face plate (ball is not shown) deformed by hitting the upper part of the face (ball is not shown). Since 2) is in contact with the reinforcing plate (5), the deformation amount d2 is suppressed based on the distance D2. On the other hand, the distance D3 is the face plate (2) deformed by the impact.
The distance may be equal to or less than the amount of elastic deformation of the face plate, or may be the distance of the plastic deformation area. As shown in FIG. 17, the face plate (2) deformed by hitting the ball at the lower part of the face (the ball is not shown) is , At least the deformation d larger than the deformation d2
Reaches 3.

According to the golf club described above, when the golf club is hit at the upper part of the face, the gear effect is reduced because the amount of deformation of the face plate is small. On the other hand, when the ball is hit at the lower part of the face, the amount of deformation of the face plate is larger than when the ball is hit at the upper part of the face. Then, the decrease in the backspin amount when hitting the ball at the upper part of the face is suppressed, and the backspin amount when hitting the ball at the lower part of the face is sufficiently increased. That is, a golf club having an increased backspin amount on average is obtained.

The fact that the distance between the reinforcing plate and the face plate in the present invention gradually increases from the upper part of the face to the lower part of the face means that in addition to the example shown in FIG. 15, the reinforcing plate as shown in FIG. The distance between the plate and the face plate is partially shortened from the upper part of the face to the lower part of the face but is gradually increased in most parts, or the distance between the reinforcing plate and the face plate as shown in FIG. The distance is constant from the upper part of the face to the lower part of the face, and gradually increases from the middle to the lower part of the face. The distance between the reinforcing plate and the face plate as shown in FIG. When the distance between the reinforcing plate and the face plate as shown in FIG. It is shorter in part Te may be one that has become sequentially longer in most. That is, all of FIGS. 15, 18, 19, 20, and 21 are included in the present invention.

As the face plate in the present invention, in addition to the round face plate as described above, a flat face plate as shown in FIG. 22 is also included in the present invention. In the present invention, the distance between the reinforcing plate and the face plate is sequentially increased from the upper face to the lower face of the face. In addition to the example shown in FIG. 22, the distance between the reinforcing plate and the face plate as shown in FIG. It is constant from the upper part of the face to the lower part of the face, and gradually increases from the middle to the lower part of the face. The distance between the reinforcing plate and the face plate as shown in FIG. 24 gradually increases from the upper part of the face to the lower part of the face. 25, the distance between the reinforcing plate and the face plate as shown in FIG. 25 is partially shortened from the upper part of the face to the lower part of the face, but is gradually increased in most parts. Is also good. That is, all of FIGS. 22, 23, 24, and 25 are included in the present invention.

The range from the upper face to the lower face in the present invention is as shown in FIG. 26. As shown in FIG. 26, the gap between the toe portion and the heel portion generated by the sole round and the horizontal surface is the same for both the toe portion and the heel portion. In other words, in a front view in a state where the x-axis is in contact with the sole portion of the head and the y-axis is in contact with the most protruding position of the toe portion in a front view in a state of being placed on a horizontal plane according to the lie angle. When the y coordinate is set, at least y = 0.9H and y
= 0.7H, preferably between at least y = 0.9H and y = 0.5H, more preferably at least y = 0.9H and y = 0.3H. 2
The range between the straight lines. Here, H is the height of the head in the y-axis direction.

For example, a reinforcing plate (5) as shown in FIG.
Is at least the range between two straight lines y = 0.9H and y = 0.7H. The reinforcing plate (5) as shown in FIG.
At least the range between two straight lines y = 0.9H and y = 0.5H (of course, the range between two straight lines y = 0.9H and y = 0.7H), as shown in FIG. The strong reinforcing plate (5) has at least y = 0.9H and y = 0.3H.
Range between straight lines (of course y = 0.9H and y = 0.7H
And the range between the two straight lines y = 0.9H and y = 0.5H).

The reinforcing plate is shown in FIGS. 15, 18, 19, 2
As shown in FIGS. 0, 21, 22, 23, 24 and 25, it is desirable that the outer shell be fixed to both the upper and lower sides of the outer shell, but as shown in FIGS. 27, 28 and 29, May be fixed only to the upper side. A reinforcing plate fixed only to the upper side in the above-mentioned range, which is shown in FIG. 15, FIG. 18, FIG. 19, FIG. 20, FIG.
2. The present invention also encompasses the configurations shown in FIGS. 23, 24, and 25.

In the second embodiment, as shown in FIG. 13, when the head is placed on a horizontal plane at the lie angle, the x-axis is in contact with the sole portion of the head.
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, x = 0.1L and x = 0.9L
Range between straight lines, preferably x = 0.2L and x = 0.8
In at least one position within a range between two straight lines of L,
It is sufficient that the distance between the reinforcing plate and the face plate gradually increases from the upper face to the lower face. These are determined by a BB cross section taken along a cut perpendicular to a line segment R generally corresponding to a leading edge as shown in FIG. 14, and at least one BB within the range described above. In the cross section, the distance between the reinforcing plate and the face plate only needs to gradually increase from the upper face to the lower face. Here, L is the width of the head in the x-axis direction, and the width L is 16 m between the horizontal surface and the sole portion on the heel side from the position where the toe portion most protrudes.
This is the distance to the position that is m.

A golf club having the above-described head has a low backspin amount of a hit ball as seen in a golfer of a type having a relatively low head speed or a type of golfer who does not use a wrist much during a swing. Suitable for small golfers.

Next, a third embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 30 is a cross-sectional view of the head according to the present invention (a cross-sectional view along AA in FIG. 1). The head (1) of the present embodiment has a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and a hollow inside. A portion (4) is formed, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow portion (4).

In this embodiment, the reinforcing plate (5) is arranged only at the lower part of the face, and the distance D4 between the face plate (2) and the reinforcing plate (5) is changed by the face plate deformed by hitting the ball. Is set to a distance that can abut the.

The distance D4 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting, and as shown in FIG. 31, the face plate (ball is not shown) deformed by hitting at the lower part of the face (ball is not shown). Since 2) is in contact with the reinforcing plate (5), the deformation amount d4 is suppressed based on the distance D4.

According to the golf club described above, when the ball is hit at the lower part of the face, the gear effect is reduced because the amount of deformation of the face plate is small. On the other hand, when the ball is hit at the upper part of the face, there is no reinforcing plate for suppressing the deformation of the face plate, and the gear effect is larger than that at the time of hitting the ball at the lower part of the face. Then, an increase in the amount of backspin when hitting the ball at the lower part of the face is suppressed, and a decrease in the amount of backspin when hitting the ball at the upper part of the face is sufficiently obtained. That is, a golf club having a reduced backspin amount on average is obtained.

The distance between the reinforcing plate and the face plate in the present invention may be any distance as long as the face plate deformed by hitting can contact the reinforcing plate, and need not always be constant. In addition to the reinforcing plate arranged in parallel with the rounded face plate as shown in FIG. 30, the reinforcing plate having a flat surface as shown in FIG. 32, and the reinforcing plate and the face plate as shown in FIG. The distance between the reinforcing plate and the face plate as shown in FIG. 34 may be widened from the lower part of the face to the central part of the face.
That is, FIGS. 30, 32, 33, and 34 are all included in the present invention.

As the face plate in the present invention, in addition to the round face plate as described above, a flat face plate as shown in FIG. 35 is also included in the present invention. The distance between the face plate and the reinforcing plate in the present invention may be any distance at which the face plate deformed by the impact can contact the reinforcing plate, and need not always be constant. In addition to the arrangement of the reinforcing plate parallel to the flat face plate as shown in FIG. 35,
The distance between the reinforcing plate and the face plate as shown in FIG. 36 decreases from the lower part of the face to the center of the face, or the distance between the reinforcing plate and the face plate as shown in FIG. It may be one that is spread over the department. That is, FIG.
6. All of FIG. 37 is included in the present invention.

As shown in FIG. 10, the lower portion of the face according to the present invention is such that the gap between the toe portion, the heel portion and the horizontal plane generated by the sole round is the same for the toe portion and the heel portion as shown in FIG. In other words, in a front view in a state of being placed on a horizontal plane according to the lie angle, the xy coordinates such that the x axis contacts the sole portion of the head and the y axis contacts the most protruding position of the toe portion. When set, the range is between two straight lines y = 0 and y = 0.5H. Here, H is the height of the head in the y-axis direction. In at least one position within the above range, the distance between the face plate and the reinforcing plate may be set to a distance at which the face plate deformed by hitting can contact the reinforcing plate.

FIGS. 30, 32, 33, 3
4, the form fixed to the lower side of the outer shell is desirable as shown in FIGS. 35, 36 and 37, but is not fixed to either the upper side or the lower side of the outer shell as shown in FIG. Such a form is also included in the present invention. By the way, in order to make the form shown in FIG. 38 easy to understand, a state in which the face plate is removed in a front view is illustrated. As shown in FIG. 39, the reinforcing plate (5) is attached to the heel portion and the toe portion of the outer shell (3). It turns out that it is fixed.

In the third embodiment, as shown in FIG. 13, when the head is placed on a horizontal plane at the lie angle so that the x-axis is in contact with the sole portion of the head,
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, x = 0.1L and x = 0.9L
Range between straight lines, preferably x = 0.2L and x = 0.8
A reinforcing plate may be provided only at the lower part of the face at at least one position within the range between the two straight lines L. They are,
BB by a cut perpendicular to a line segment R corresponding to a leading edge generally referred to as shown in FIG.
Judgment is made based on the cross section. In at least one BB cross section within the above range, a reinforcing plate may be provided only along the lower face. Here, L is the width of the head in the x-axis direction, and the width L is the distance from the position where the toe portion most protrudes to the position where the distance between the horizontal surface and the sole portion on the heel side is 16 mm.

A golf club having a head as described above has a backspin amount of a hit ball as seen, for example, by a golfer of a type having a relatively high head speed or a golfer who actively uses a wrist during a swing. It is suitable for golfers who have many.

Next, a fourth embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 40 is a sectional view of the head according to the present invention (a sectional view taken along line AA in FIG. 1). The head (1) of the present embodiment has a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and a hollow inside. A portion (4) is formed, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow portion (4).

In this embodiment, the distance between the face plate (2) and the reinforcing plate (5) is changed from the distance D5 between the face plate (2) and the reinforcing plate (5) below the face to the face plate above the face. The length is gradually increased over a distance D6 between (2) and the reinforcing plate (5).

The distance D5 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting. As shown in FIG. 41, the face plate (ball is not shown) deformed by hitting at the lower part of the face (ball is not shown). Since 2) is in contact with the reinforcing plate (5), the deformation amount d5 is suppressed based on the distance D5. On the other hand, the distance D6 is the face plate (2) deformed by the impact.
The distance may be equal to or less than the amount of elastic deformation of the face plate, or may be the distance of the plastic deformation region. As shown in FIG. , A deformation amount d larger than at least the deformation amount d5
To 6.

According to the golf club described above, when the ball is hit at the lower portion of the face, the gear effect is reduced because the face plate is deformed less. On the other hand, when the ball is hit at the upper part of the face, the amount of deformation of the face plate is larger than when the ball is hit at the lower part of the face. Then, an increase in the amount of backspin when hitting the ball at the lower part of the face is suppressed, and a decrease in the amount of backspin when hitting the ball at the upper part of the face is sufficiently obtained. That is, a golf club having a reduced backspin amount on average is obtained.

In the present invention, the fact that the distance between the reinforcing plate and the face plate gradually increases from the lower part of the face to the upper part of the face means that in addition to the example shown in FIG. 40, the reinforcing plate shown in FIG. The distance between the plate and the face plate is partially shortened from the lower part of the face to the upper part of the face but is gradually increased in most parts, or the distance between the reinforcing plate and the face plate as shown in FIG. The distance is constant from the lower part of the face to the upper part of the face, and gradually increases from the middle to the upper part of the face, and the distance between the reinforcing plate and the face plate as shown in FIG. 45 is from the lower part of the face to the upper part of the face. 46, the distance between the reinforcing plate and the face plate as shown in FIG. It is shorter in part Te may be one that has become sequentially longer in most. That is, all of FIGS. 40, 43, 44, 45, and 46 are included in the present invention.

The face plate of the present invention includes, in addition to the round face plate as described above, a flat face plate as shown in FIG. 47. 47 that the distance between the reinforcing plate and the face plate in the present invention gradually increases from the lower part of the face to the upper part of the face means that the distance between the reinforcing plate and the face plate as shown in FIG. It is constant from the lower part of the face to the upper part of the face, and gradually increases from the middle to the upper part of the face.The distance between the reinforcing plate and the face plate as shown in FIG. 49 gradually increases from the lower part of the face to the upper part of the face. The distance between the reinforcing plate and the face plate as shown in FIG. 50 is partially shortened from the lower part of the face to the upper part of the face, but is gradually increased in most parts. Is also good. That is, all of FIGS. 47, 48, 49, and 50 are included in the present invention.

As shown in FIG. 26, the range from the lower face of the face to the upper face of the present invention is such that the gap between the toe portion and the heel portion generated by the sole round and the horizontal surface is the same for both the toe portion and the heel portion. In other words, in a front view in a state where the x-axis is in contact with the sole portion of the head and the y-axis is in contact with the most protruding position of the toe portion in a front view in a state of being placed on a horizontal plane according to the lie angle. When the y coordinate is set, at least y = 0.1H and y
= 0.3H, preferably between at least y = 0.1H and y = 0.5H, more preferably at least y = 0.1H and y = 0.7H. 2
The range between the straight lines. Here, H is the height of the head in the y-axis direction.

For example, a reinforcing plate (5) as shown in FIG.
Is at least a range between two straight lines y = 0.1H and y = 0.3H, and the reinforcing plate (5) as shown in FIG.
At least the range between two straight lines of y = 0.1H and y = 0.5H (of course, the range between two straight lines of y = 0.1H and y = 0.3H), as shown in FIG. The reinforcing plate (5) has at least two of y = 0.1H and y = 0.7H.
Range between straight lines (of course y = 0.1H and y = 0.3H
And the range between the two straight lines y = 0.1H and y = 0.5H).

FIGS. 40, 43, 44 and 4 show the reinforcing plates.
5, 46, 47, 48, 49, and 50, it is desirable to be fixed to both the upper and lower sides of the outer shell, as shown in FIGS. 51, 52, and 53. May be fixed only to the lower side. 40, 43, 44, 45, 46, and 4 are reinforcing plates that are fixed only to the lower side within the range.
The present invention encompasses all the forms shown in FIGS. 7, 58, 49, and 50.

In the fourth embodiment, as shown in FIG. 13, when the head is placed on the horizontal plane at the lie angle, the x-axis is in contact with the sole portion of the head.
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, x = 0.1L and x = 0.9L
Range between straight lines, preferably x = 0.2L and x = 0.8
In at least one position within a range between two straight lines of L,
It suffices that the distance between the reinforcing plate and the face plate gradually increases from the lower part of the face to the upper part of the face. These are determined by a BB cross section taken along a cut perpendicular to a line segment R generally corresponding to a leading edge as shown in FIG. 14, and at least one BB within the range described above. In the cross section, the distance between the reinforcing plate and the face plate may be gradually increased from the lower part of the face to the upper part of the face. Here, L is the width of the head in the x-axis direction, and the width L is 16 m between the horizontal surface and the sole portion on the heel side from the position where the toe portion most protrudes.
This is the distance to the position that is m.

A golf club having a head as described above has a backspin amount of a hit ball as seen, for example, by a golfer of a type having a relatively high head speed or a type of golfer who actively uses a wrist during a swing. It is suitable for golfers who have many.

Next, a fifth embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 54 is a side view of the head according to the present invention, and FIG. 55 is a cross-sectional view taken along the line CC of FIG. The head (1) of the present embodiment has a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and a hollow inside. A portion (4) is formed, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow portion (4).

In this embodiment, the reinforcing plate (5) is arranged only on the face heel portion, and the distance D7 between the face plate (2) and the reinforcing plate (5) is increased by the face plate deformed by hitting the ball. The distance is set so that it can contact the plate.

The distance D7 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting, and as shown in FIG. 56, hitting of the face heel portion (ball is not shown).
Because the face plate (2) deformed by the above comes into contact with the reinforcing plate (5), the deformation amount d7 is suppressed based on the distance D7.

According to the golf club described above, when the ball is hit with the face heel portion, the amount of deformation of the face plate is small, so that the gear effect is reduced. On the other hand, when the ball is hit at the face toe, there is no reinforcing plate for suppressing the deformation of the face plate, and the gear effect is larger than that at the time of hitting at the face heel. Then, the tendency to become slice spin when hit at the face heel part is suppressed, and the tendency to become hook spin when hit at the face toe part is sufficiently obtained. That is, a golf club having a hook spin tendency on average is obtained.

The distance between the face plate and the reinforcing plate in the present invention may be any distance at which the face plate deformed by hitting can contact the reinforcing plate, and need not always be constant. In addition to the reinforcing plate arranged in parallel with the rounded face plate as shown in FIG. 55, the reinforcing plate having a flat surface as shown in FIG. 57 and the reinforcing plate and the face plate as shown in FIG. The distance between the face heel and the face center may be narrower, or the distance between the reinforcing plate and the face plate may be wider from the face heel to the face center as shown in FIG. . That is, all of FIGS. 54, 57, 58, and 59 are included in the present invention.

As the face plate in the present invention, in addition to the round face plate as described above, a flat face plate as shown in FIG. 60 is also included in the present invention. The distance between the face plate and the reinforcing plate in the present invention may be any distance at which the face plate deformed by the impact can contact the reinforcing plate, and need not always be constant. Besides the arrangement of the reinforcing plate parallel to the flat face plate as shown in FIG. 60,
The distance between the reinforcing plate and the face plate as shown in FIG. 61 is reduced from the face heel to the center of the face, or the distance between the reinforcing plate and the face plate as shown in FIG. It may be widened toward the center of the face. That is, FIG.
0, FIG. 61 and FIG. 62 are all included in the present invention.

As shown in FIG. 63, the range of the face heel portion in the present invention is such that the gap formed between the toe portion and the heel portion and the horizontal surface generated by the sole round is the same for the toe portion and the heel portion. Xy coordinates such that the x-axis is in contact with the sole portion of the head and the y-axis is in contact with the most protruding position of the toe portion in a front view in a state of being placed on a horizontal plane according to the lie angle. Is a range between two straight lines of x = 0.5L and x = L. However, L is the distance between the horizontal plane and the heel part is 16 mm
Is the coordinate value in the x-axis direction of the position. In at least one position within the above range, the distance between the face plate and the reinforcing plate may be set to a distance at which the face plate deformed by the impact can contact the reinforcing plate.

FIG. 54, FIG. 57, FIG. 58, FIG.
It is preferable that the outer shell is fixed to the heel side of the outer shell as shown in FIGS. 60, 61, and 62. However, as shown in FIG. 64, the outer shell is fixed to both the heel side and the toe side of the outer shell. Such forms that are not present are also encompassed by the present invention. By the way, Fig. 6
In order to make the form shown in FIG. 4 easy to understand, FIG.
5, it can be seen that the reinforcing plate (5) is fixed to the upper and lower portions of the outer shell (3).

In the fifth embodiment, as shown in FIG. 66, when the head is placed on a horizontal plane at the lie angle so that the x-axis is in contact with the sole portion of the head, as shown in FIG.
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, two values of y = 0.1H and y = 0.9H are obtained.
Range between straight lines, preferably y = 0.2H and y = 0.8
A reinforcing plate may be provided along at least the face heel portion at at least one position within the range between the two straight lines of H. However,
H is the height of the head in the y-axis direction. These are shown in FIG.
In the figure viewed from the toe side in a state where the head is placed on the horizontal plane at the lie angle as shown in the above, it is judged by the DD cross section by a cut parallel to the horizontal plane, and at least one D- In the cross section D, a reinforcing plate may be provided only along the face heel portion.

A golf club equipped with a head as described above, for example, wants to reduce the slice spin of a hit ball, as seen in a golfer of a type in which a hit ball slices large or a golfer who dislikes slicing of a hit ball. Or, it is suitable for a golfer who wants to correct.

Next, a sixth embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 68 is a sectional view of the head according to the present invention (a sectional view taken along line CC of FIG. 54). The head (1) of the present embodiment includes a face plate (2) having a face surface for hitting a ball, and a face plate (2).
And a hollow part (4) is formed inside, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow part (4). It has a structure.

In this embodiment, the distance between the face plate (2) and the reinforcing plate (5) is changed from the distance D8 between the face plate (2) and the reinforcing plate (5) in the face heel portion to the distance in the face toe portion. The length is gradually increased over a distance D9 between the face plate (2) and the reinforcing plate (5).

The distance D8 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by the impact, and as shown in FIG. 69, the impact of the face heel portion (the ball is not shown).
Since the face plate (2) deformed by the above comes into contact with the reinforcing plate (5), the deformation amount d8 is suppressed based on the distance D8. On the other hand, the distance D9 may be a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting, or may be a distance in a plastic deformation area. As shown in FIG. The face plate (2) deformed by the ball (not shown) reaches a deformation d9 which is at least larger than the deformation d8.

According to the golf club described above, when the ball is hit with the face heel, the gear effect is reduced due to the small amount of deformation of the face plate. On the other hand, when the ball is hit at the face toe, the amount of deformation of the face plate is greater than when hit at the face heel,
It is larger than the gear effect when hitting the ball at the face heel. Then, the tendency to become slice spin when hit at the face heel part is suppressed, and the tendency to become hook spin when hit at the face toe part is sufficiently obtained. That is, a golf club having a hook spin tendency on average is obtained.

In the present invention, the fact that the distance between the reinforcing plate and the face plate gradually increases from the face heel portion to the face toe portion means that in addition to the example shown in FIG. 68, the reinforcing plate shown in FIG. The distance between the reinforcing plate and the face plate is partially shortened from the face heel portion to the face toe portion, but is gradually increased for the most part, or the reinforcing plate and the face as shown in FIG. The distance between the reinforcing plate and the face plate is constant between the face heel portion and the face toe portion, and is gradually increased from the middle to the face toe portion. The distance between the reinforcing plate and the face plate as shown in FIG. 74 is gradually increased from the face heel to the face toe. But it is shorter in part from the heel portion to face the toe portion may be one that has become sequentially longer in the majority. That is, FIGS.
1, FIG. 72, FIG. 73, and FIG. 74 are all included in the present invention.

The face plate according to the present invention includes a flat face plate as shown in FIG. 75 in addition to the round face plate as described above. In the present invention, the distance between the reinforcing plate and the face plate is gradually increased from the face heel portion to the face toe portion. In addition to the example shown in FIG. 75, the distance between the reinforcing plate and the face plate as shown in FIG. However, the distance between the reinforcing plate and the face plate as shown in FIG. 77 is constant from the face heel portion to the face toe portion and is gradually increased from the middle to the face toe portion. Although the length gradually increases toward the face toe, the distance between the reinforcing plate and the face plate as shown in FIG. 78 is partially shortened from the face heel to the face toe, but in most cases It may be one that becomes longer sequentially. That is, FIG.
6, FIG. 77 and FIG. 78 are all included in the present invention.

The range from the face heel portion to the face toe portion in the present invention is, as shown in FIG. 79, the head formed by the toe portion generated by the sole round, the gap formed between the heel portion and the horizontal plane, the toe portion and the heel portion. So that the x-axis is in contact with the sole portion of the head and the y-axis is in contact with the most protruding position of the toe portion in a front view in a state of being placed on a horizontal plane at the lie angle. When the xy coordinates are set, at least x = 0.9
The range between two straight lines L and x = 0.7L, preferably at least the range between two straight lines x = 0.9L and x = 0.5L, more preferably at least x = 0.9L and x = 0 .
It is a range between two straight lines of 3L. Here, L is the width of the head in the x-axis direction.
mm.

For example, a reinforcing plate (5) as shown in FIG.
Is at least a range between two straight lines of x = 0.9L and x = 0.7L, and the reinforcing plate (5) as shown in FIG.
At least the range between two straight lines x = 0.9L and x = 0.5L (of course, the range between two straight lines x = 0.9L and x = 0.7L), as shown in FIG. The reinforcing plate (5) has at least x = 0.9L and x = 0.3L.
Range between straight lines (of course x = 0.9L and x = 0.7L
And the range between two straight lines of x = 0.9L and x = 0.5L).

FIG. 68, FIG. 71, FIG. 72, FIG.
3, it is desirable that the outer shell is fixed to both the heel side and the toe side of the outer shell as shown in FIGS. 80, 81 and 82. It may be such that it is fixed only on the heel side.
A reinforcing plate fixed only to the heel side within the above-described range.
3, those having the forms shown in FIGS. 74, 75, 76, 77, and 78 are all included in the present invention.

In the sixth embodiment, as shown in FIG. 66, when the head is placed on a horizontal plane at a lie angle so that the x-axis is in contact with the sole portion of the head, as shown in FIG.
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, two values of y = 0.1H and y = 0.9H are obtained.
Range between straight lines, preferably y = 0.2H and y = 0.8
At least one point within a range between two straight lines of H,
It is sufficient that the distance between the reinforcing plate and the face plate is gradually increased from the face heel portion to the face toe portion. Here, H is the height of the head in the y-axis direction. These are determined by the D-D cross section taken along a cut parallel to the horizontal plane in a view seen from the toe side with the head placed on the horizontal plane at the lie angle as shown in FIG. 67,
In at least one DD section within the above range, the distance between the reinforcing plate and the face plate only needs to be gradually increased from the face heel portion to the face toe portion.

A golf club equipped with the above-described head is desired to suppress the slice spin of a hit ball, such as is found in a golfer of a type that largely slices a hit ball or a golfer who dislikes slicing of a hit ball. Or, it is suitable for a golfer who wants to correct.

Next, a seventh embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 83 is a sectional view of the head according to the present invention (a sectional view taken along line CC of FIG. 54). The head (1) of the present embodiment includes a face plate (2) having a face surface for hitting a ball, and a face plate (2).
And a hollow part (4) is formed inside, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow part (4). It has a structure.

In this embodiment, the reinforcing plate (5) is arranged only on the face toe portion, and the distance D10 between the face plate (2) and the reinforcing plate (5) is changed by the face plate deformed by hitting the ball. The distance was set so that it could contact the board.

The distance D10 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by the impact, and as shown in FIG. 84, the impact of the face toe portion (the ball is not shown).
The deformed face plate (2) abuts on the reinforcing plate (5), so that the deformation amount d10 is suppressed based on the distance D10.

According to the golf club described above, when the golf club is hit with a face toe, the gear effect is reduced due to the small deformation of the face plate. On the other hand, when the ball is hit at the face heel portion, there is no reinforcing plate for suppressing the deformation of the face plate, which is larger than the gear effect at the time of hitting the ball at the face toe portion. Then, the tendency of hook spin when hit at the face toe is suppressed, and the tendency of slice spin at hit at the face heel is sufficiently obtained. That is, a golf club having a slice spin tendency on average is obtained.

The distance between the face plate and the reinforcing plate in the present invention may be any distance as long as the face plate deformed by hitting can contact the reinforcing plate, and need not always be constant. In addition to the reinforcing plate arranged in parallel with the rounded face plate as shown in FIG. 83, the reinforcing plate having a flat reinforcing plate as shown in FIG. 85, and the reinforcing plate and the face plate as shown in FIG. The distance between the face toe and the center of the face may be narrower, or the distance between the reinforcing plate and the face plate may be wider from the face toe to the center of the face as shown in FIG. . That is, all of FIGS. 83, 85, 86, and 87 are included in the present invention.

The face plate of the present invention includes a flat face plate as shown in FIG. 88 in addition to the round face plate as described above. The distance between the face plate and the reinforcing plate in the present invention may be any distance at which the face plate deformed by the impact can contact the reinforcing plate, and need not always be constant. In addition to the arrangement of the reinforcing plate parallel to the flat face plate as shown in FIG. 88,
The distance between the reinforcing plate and the face plate as shown in FIG. 89 is reduced from the face toe portion to the center of the face, or the distance between the reinforcing plate and the face plate as shown in FIG. It may be widened toward the center of the face. That is, all of FIGS. 88, 89, and 90 are included in the present invention.

As shown in FIG. 63, the range of the face toe portion in the present invention is such that the gap between the toe portion, the heel portion and the horizontal plane generated by the sole round is the same for the toe portion and the heel portion as shown in FIG. Xy coordinates such that the x-axis is in contact with the sole portion of the head and the y-axis is in contact with the most protruding position of the toe portion in a front view in a state of being placed on a horizontal plane according to the lie angle. Is the range between two straight lines of x = 0 and x = 0.5L. In at least one position within the above range, the distance between the face plate and the reinforcing plate may be set to a distance at which the face plate deformed by the impact can contact the reinforcing plate. Where L
Is the width of the head in the x-axis direction, and the width L is the distance from the position where the toe portion most protrudes to the position where the distance between the horizontal surface and the sole portion on the heel side is 16 mm.

FIGS. 83, 85, 86, and 8 show the reinforcing plates.
7, 88, 89, and 90, it is preferable that the outer shell is fixed to the toe side, but as shown in FIG. 91, it is fixed to both the heel side and the toe side of the outer shell. Such forms that are not present are also encompassed by the present invention. By the way, Fig. 91
In order to make it easy to understand the form shown in FIG.
It can be seen that the reinforcing plate (5) is fixed to the upper and lower parts of the outer shell (3) as shown in FIG.

In the seventh embodiment, as shown in FIG. 66, when the head is placed on a horizontal plane at the lie angle so that the x-axis is in contact with the sole portion of the head, as shown in FIG.
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, two values of y = 0.1H and y = 0.9H are obtained.
Range between straight lines, preferably y = 0.2H and y = 0.8
A reinforcing plate may be provided only at the face toe portion at at least one position within the range between the two straight lines H. Where H
Is the height of the head in the y-axis direction. These are determined by the DD cross section cut along a plane parallel to the horizontal plane in a view as viewed from the toe side in a state where the head is placed on the horizontal plane at the lie angle as shown in FIG. 67. In at least one DD section, a reinforcing plate may be provided only along the face toe portion.

A golf club having the above-mentioned head is required to suppress the hook spin of a hit ball as seen in, for example, a golfer of a type in which a hit ball largely hooks or a golfer who does not want to hit a hit ball. Or, it is suitable for a golfer who wants to correct.

Next, an eighth embodiment of the golf club according to the present invention will be described with reference to the drawings. FIG. 93 is a cross-sectional view (a cross-sectional view taken along line CC of FIG. 54) of the head according to the present invention. The head (1) of the present embodiment includes a face plate (2) having a face surface for hitting a ball, and a face plate (2).
And a hollow part (4) is formed inside, and a reinforcing plate (5) is provided on the back side of the face plate (2) in the hollow part (4). It has a structure.

In the present embodiment, the distance between the face plate (2) and the reinforcing plate (5) is changed from the distance D11 between the face plate (2) and the reinforcing plate (5) in the face toe portion to the position in the face heel portion. Face plate (2) and reinforcement plate (5)
And the distance becomes longer gradually toward the distance D12.

The distance D11 is a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting, and as shown in FIG. 94, hitting of the face toe portion (ball is not shown).
The deformed face plate (2) abuts on the reinforcing plate (5), so that the deformation amount d11 is suppressed based on the distance D11. On the other hand, the distance D12 may be a distance equal to or less than the amount of elastic deformation of the face plate (2) deformed by hitting, or may be a distance in a plastic deformation region. As shown in FIG. The face plate (2) deformed by (the ball is not shown) reaches a deformation d12 which is at least larger than the deformation d11.

According to the golf club described above, when the golf club is hit with the face toe, the gear effect is reduced because the amount of deformation of the face plate is small. On the other hand, when the ball is hit at the face heel portion, the amount of deformation of the face plate is larger than when the ball is hit at the face toe portion, so that the gear effect when hit at the face toe portion is larger. Then, the tendency of hook spin when hit at the face toe is suppressed, and the tendency of slice spin at hit at the face heel is sufficiently obtained. That is, a golf club having a slice spin tendency on average is obtained.

In the present invention, the fact that the distance between the reinforcing plate and the face plate gradually increases from the face toe portion to the face heel portion means that, in addition to the example shown in FIG. 93, the reinforcing plate as shown in FIG. 96 is flat. The distance between the reinforcing plate and the face plate is partially shortened from the face toe portion to the face heel portion but is gradually increased in most portions, or the reinforcing plate and the face as shown in FIG. The distance between the plate and the face plate is constant from the face toe to the face heel, and is gradually increased from the middle to the face heel. The length between the face toe and the face heel gradually increases, and the distance between the reinforcing plate and the face plate as shown in FIG. But it is shorter in part from Stowe portion to face the heel portion may be one that has become sequentially longer in the majority. That is, all of FIGS. 93, 96, 97, 98, and 99 are included in the present invention.

As the face plate in the present invention, in addition to the round face plate as described above, a flat face plate as shown in FIG. 100 is also included in the present invention. The distance between the reinforcing plate and the face plate in the present invention is sequentially increased from the face toe portion to the face heel portion,
In addition to the example shown in FIG. 100, the distance between the reinforcing plate and the face plate as shown in FIG. Things, FIG. 102
The distance between the reinforcing plate and the face plate is gradually increased from the face toe portion to the face heel portion as shown in FIG. 103, and the distance between the reinforcing plate and the face plate as shown in FIG. It may be partially shortened from the toe portion to the face heel portion, but may be gradually increased in most portions. That is, all of FIGS. 100, 101, 102, and 103 are included in the present invention.

The range from the face toe portion to the face heel portion in the present invention is as shown in FIG. 79, in which the head is formed by the toe portion generated by the sole round, and the gap between the heel portion and the horizontal plane is the toe portion and the heel portion. So that the x-axis is in contact with the sole portion of the head and the y-axis is in contact with the most protruding position of the toe portion in a front view in a state of being placed on a horizontal plane at the lie angle. When xy coordinates are set, at least x = 0.1
The range between two straight lines L and x = 0.3L, preferably at least the range between two straight lines x = 0.1L and x = 0.5L, more preferably at least x = 0.1L and x = 0 .
It is a range between two straight lines of 7L. Here, L is the width of the head in the x-axis direction.
mm.

For example, the reinforcing plate (5) as shown in FIG. 104 has at least x = 0.1L and x = 0.3L.
The reinforcing plate (5) as shown in FIG. 105 has a range between at least x = 0.1L and x = 0.5L.
Range between straight lines (of course x = 0.1L and x = 0.3L
106, and the reinforcing plate (5) as shown in FIG. 106 has at least x = 0.1 L and x = 0.1L.
The range between two straight lines of 0.7L (of course, the range between two straight lines of x = 0.1L and x = 0.3L and x = 0.1L and x
= 0.5L).

FIGS. 93, 96, 97, 9
8, FIG. 99, FIG. 100, FIG. 101, FIG. 102, FIG.
It is desirable that the outer shell be fixed to both the heel side and the toe side of the outer shell as shown in FIGS.
As shown at 06, it may be such that it is fixed only to the toe side. In the above-mentioned range, the reinforcing plate is fixed only to the toe side, and is shown in FIGS.
7, FIG. 98, FIG. 99, FIG. 100, FIG. 101, FIG.
The present invention includes all the configurations shown in FIG. 103.

In the eighth embodiment, as shown in FIG. 66, when the head is placed on a horizontal plane at a lie angle so that the x-axis is in contact with the sole of the head, as shown in FIG.
x- such that the y-axis is in contact with the most protruding position of the toe
When the y coordinate is set, two values of y = 0.1H and y = 0.9H are obtained.
Range between straight lines, preferably y = 0.2H and y = 0.8
At least one point within a range between two straight lines of H,
It is sufficient that the distance between the reinforcing plate and the face plate is gradually increased from the face toe portion to the face heel portion. Here, H is the height of the head in the y-axis direction. These are determined by the D-D cross section taken along a cut parallel to the horizontal plane in a view seen from the toe side with the head placed on the horizontal plane at the lie angle as shown in FIG. 67,
In at least one DD section within the above range, the distance between the reinforcing plate and the face plate only needs to be gradually increased from the face toe portion to the face heel portion.

A golf club having the above-described head is desired to suppress the hook spin of a hit ball, which is seen in a golfer of a type in which a hit ball largely hooks or a golfer who dislikes a hit of a hit ball, Or, it is suitable for a golfer who wants to correct.

The golf clubs described above are all right-handed golf clubs. For a left-handed golf club, the face toe and heel directions are reversed left and right.

The distance that the face plate deformed by the impact in the present invention can contact the reinforcing plate varies depending on the material, area, thickness, shape of the outer shell and the like of the face plate. Actually, at the stage where the face plate material, area, thickness, outer shell shape, etc. are determined, the impact test is performed to measure the deformation amount, or the deformation amount is measured using FEM analysis, and It is desirable to set a distance at which the deformed face plate can contact the reinforcing plate. As described above, the distance at which the face plate deformed by the impact can contact the reinforcing plate cannot be unconditionally determined, but is generally 0.3 mm to 0.6 mm.
Range.

The distance between the reinforcing plate and the face plate in the present invention is determined by the overall shape of the head, the thickness of the outer shell, the size of the head, and the like, and it is desired to partially suppress the amount of deformation of the face plate. In this case, it is necessary to set in the elastic deformation region of the face plate.

Although the thickness of the face plate in the present invention is not particularly defined, it is 0.5 mm to 5.0 mm, preferably
It is 1.5 mm to 3.5 mm. Although the thickness of the reinforcing plate in the present invention is not particularly limited, it is 1.0 mm to 5.0 mm.
mm, preferably 1.5 mm to 3.5 mm.

The thickness of the reinforcing plate does not need to be particularly constant from the upper face to the lower face. As a matter of fact, the surface shape of the reinforcing plate on the side facing the face plate as in the example described above may be a flat surface, a curved surface, a combination thereof, or a curved surface, and the thickness of the reinforcing plate should be constant. Is difficult, and it is not always necessary to keep it constant from a functional aspect.

Incidentally, the distance between the reinforcing plate and the face plate, the amount of deformation of the face plate, the thickness of the face plate, the thickness of the reinforcing plate, and the like shown above are set for easy explanation. Therefore, it is not necessarily based on the actual scale.

As the head material in the present invention, a synthetic resin, a fiber reinforced resin, a fiber reinforced metal, etc. can be considered in addition to a metal such as an iron alloy such as a titanium alloy and stainless steel, an aluminum alloy and a magnesium alloy. . The present invention also includes a composite head made of different materials in addition to the same material for the face plate and the outer shell.

The material of the reinforcing plate may be a synthetic resin, a fiber reinforced resin, a fiber reinforced metal, or the like, in addition to a metal such as an iron alloy such as a titanium alloy or stainless steel, an aluminum alloy, or a magnesium alloy. The material of the reinforcing plate and the material of the face plate may be the same or different.

The hollow portion in the present invention may have a structure in which a low-specific-gravity synthetic resin material such as urethane foam, a fluid, compressed air, or the like is enclosed, in addition to the hollow portion formed of the atmosphere.

[0130]

EXAMPLES A ball test was conducted to confirm the effects of the present invention. Production of Golf Clubs Golf clubs of Examples 1 to 8 and Comparative Example 1 having the basic characteristics shown in Table 1 were produced.

[0131]

[Table 1]

Example 1 As shown in FIG. 2, a face plate (2) provided with a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and In a golf club provided with a head (1) having a hollow portion (4) formed therein, a reinforcing plate (5) is provided inside the hollow portion (4) behind the face plate (2). The reinforcing plate (5) has y = H shown in FIG.
To y = 0.75H. The distance D1 between the face plate (2) and the reinforcing plate (5) is 0.3 mm and is constant. FIG. 2 is a cross-sectional view at the center of the width L in FIG.

Embodiment 2 As shown in FIG. 15, a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The distance between the face plate (2) and the reinforcing plate (5) is determined by the distance between the face plate (2) and the upper face.
A distance D3 between the face plate (2) and the reinforcing plate (5) at the lower part of the face from a distance D2 between the reinforcing plate (5) and the
It becomes longer gradually toward. The length of the distance D2 is 0.3
mm, and the length of the distance D3 is 0.6 mm. FIG.
FIG. 5 is a sectional view at the center of the width L in FIG.

Embodiment 3 As shown in FIG. 30, a face plate (2) having a face surface for hitting a ball, an outer shell (3) having the face plate (2) arranged on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The reinforcing plate (5) is provided with y =
It exists from 0 to y = 0.25H. Face plate (2)
The distance D4 between the reinforcing plate and the reinforcing plate (5) is 0.3 mm and is constant. FIG. 30 is a cross-sectional view at the center of the width L in FIG.

Example 4 As shown in FIG. 40, a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The distance between the face plate (2) and the reinforcing plate (5) is determined by the distance between the face plate (2) under the face.
D5 between the face plate (2) and the reinforcing plate (5) in the upper part of the face from the distance D5 between the reinforcing plate and the reinforcing plate (5)
It becomes longer gradually toward. The length of the distance D5 is 0.3
mm, and the length of the distance D6 is 0.6 mm. FIG. 40 is a cross-sectional view at the center of the width L in FIG.

Embodiment 5 As shown in FIG. 55, a face plate (2) provided with a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The reinforcing plate (5) has x =
There are from L to x = 0.75L. Face plate (2)
The distance D7 between the stiffener and the reinforcing plate (5) is 0.3 mm and is constant. FIG. 55 is a sectional view at the center of the height H in FIG.

Embodiment 6 As shown in FIG. 68, a face plate (2) having a face surface for hitting a ball, an outer shell (3) having the face plate (2) arranged on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The distance between the face plate (2) and the reinforcing plate (5) is determined by the distance D8 between the face plate (2) and the reinforcing plate (5) in the face heel portion and the distance between the face plate (2) and the reinforcing plate in the face toe portion. (5) and gradually increases toward the distance D9. The length of the distance D8 is 0.3 mm, and the length of the distance D9 is 0.6 mm. FIG. 68 is a cross-sectional view at the center of the height H in FIG.

Embodiment 7 As shown in FIG. 83, a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The reinforcing plate (5) has x =
There are from 0 to x = 0.25L. Face plate (2)
The distance D10 between the metal and the reinforcing plate (5) is 0.3 mm and is constant. FIG. 83 is a cross-sectional view at the center of height H in FIG.

Embodiment 8 As shown in FIG. 93, a face plate (2) provided with a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and In a golf club provided with a head (1) forming a hollow portion (4) therein,
A reinforcing plate (5) was provided on the back side of the face plate (2) in the hollow portion (4). The distance between the face plate (2) and the reinforcing plate (5) is from the distance D11 between the face plate (2) and the reinforcing plate (5) in the face toe portion to the distance between the face plate (2) and the reinforcing plate in the face heel portion. (5) and gradually increases toward the distance D12. Distance D1
The length of 1 is 0.3 mm and the length of the distance D12 is 0.6 mm
It is. FIG. 93 is a sectional view at the center of the height H in FIG.

Comparative Example 1 As shown in FIG. 107, a face plate (2) having a face for hitting a ball, an outer shell (3) having the face plate (2) disposed on the front surface, and Hollow part inside (4)
The golf club provided with the head (1) that forms the golf club. There is no reinforcing plate (5).

Selection of Golfers Four types of golfers were selected as shown below.

(1) Golfer with Small Back Spin Amount of Hitting Ball In general, when the back spin of a golfer's hitting ball is measured with a golf club having a loft angle of 10 degrees, 2800 rpm
Per is average. In the present invention, 10 golf balls were hit with the golf club of Comparative Example 1, and a golfer whose average backspin amount was 2200 rpm or less was selected as a golfer with a small backspin amount.

(2) Golfer Having a Large Back Spin Amount of Hitted Ball For the same reason as above, the golf club of Comparative Example 1
Hit a 0 ball, and the average value of backspin at that time is 340
A golfer having 0 rpm or more was selected as a golfer having a large amount of back spin of a hit ball.

(3) Golfer having a strong tendency to slice spin on hitting ball In general, when the side spin amount is 200 rpm or more, the bending of the hitting ball becomes recognizable, and when the side spin amount is 500 rpm or more, the bending becomes large. In the present invention, 10 golf balls were hit with the golf club of Comparative Example 1, and the average value of the side spin amount at that time was 300 rpm in the slice spin direction.
The above golfers were selected as golfers having a strong tendency to slice spin when hitting a ball.

(4) Golfer Who Has a Strong Tendency of Hook Spin of Hitting Ball For the same reason as above, the golf club of Comparative Example 1
A golfer who hit a 0 ball and the average value of the side spin amount at that time was 300 rpm or more in the hook spin direction was selected as a golfer having a strong hook spin tendency in hitting the ball.

Hitting Test Each golfer performed a hitting test on a predetermined golf club. The ball test selected a flat field. FIG. 108 shows an overhead view of the field. As shown in FIG. 108, the golfer hits the ball from the ball hitting point E toward the target point E ', and measures the flight distance (m) and the bending (m). For example, in FIG. 108, assuming that the ball hit from the point E falls and stops at the point F, the flight distance is 180
m and the bend is measured to be 14 m.

(1) Ball test of golfer with small back spin amount of hit ball For golfer with small back spin amount of hit ball,
As described above, the golf clubs of Embodiment 1 and Embodiment 2 are preferable. Therefore, golfers having a small backspin amount of the hit ball performed a hit test on the golf club of Example 1, the golf club of Example 2, and the golf club of Comparative Example 1. The golfer hit each of the golf clubs of Example 1, Example 2, and Comparative Example 1 with 50 balls, and calculated the average values of the flight distance and the bend (m) of each golf club to the first decimal place. Table 2 shows the results.

[0148]

[Table 2]

[0149] According to Table 2, Example 1 was compared with Comparative Example 1.
In the second embodiment, the flight distance is large and the bending is small. In other words, it can be seen that the golf clubs of Example 1 and Example 2 are suitable golf clubs that have a long flight distance and do not bend, especially for golfers who have a small amount of backspin when hit.

(2) Hitting test of golfer having large back spin amount of hit ball For golfers having large back spin amount of hit ball, golf clubs of Examples 3 and 4 are suitable as described above. Therefore, golfers having a large amount of back spin of the hit ball performed a hit test on the golf club of Example 3, the golf club of Example 4, and the golf club of Comparative Example 1. The golfer hit each of the golf clubs of Example 3, Example 4, and Comparative Example 1 with 50 balls, and calculated the average value of the flight distance and the bending (m) of each golf club to the first decimal place. Table 3 shows the results.

[0151]

[Table 3]

According to Table 3, Example 3 was compared with Comparative Example 1.
In the fourth embodiment, the flight distance is increased and the bending is reduced. In other words, it can be seen that the golf clubs of Example 3 and Example 4 are suitable golf clubs that have a long flight distance and do not bend, especially for golfers who have a large amount of backspin when hit.

(3) Hitting test of golfer having strong tendency of slice spin of hitting ball For golfers having strong tendency of slice spin of hitting ball, golf clubs of Examples 5 and 6 are suitable as described above. Accordingly, golfers having a strong tendency to slice spin on hitting balls performed hitting tests on the golf clubs of Example 5, the golf clubs of Example 6, and the golf club of Comparative Example 1. The golfer hit each of the golf clubs of Example 5, Example 6, and Comparative Example 1 with 50 balls, and calculated the average value of the flight distance and the bend (m) of each golf club to the first decimal place. Table 4 shows the results.

[0154]

[Table 4]

According to Table 4, Example 5 was compared with Comparative Example 1.
In the sixth embodiment, the flight distance is increased and the bending is reduced. In other words, it can be understood that the golf clubs of Example 5 and Example 6 are suitable golf clubs that have a long flight distance and do not bend, especially for golfers who have a strong tendency to slice spin when hitting a ball.

(4) Hitting test of golfer having strong tendency of hook spin of hitting ball For golfer having strong tendency of hooking spin of hitting ball,
As described above, the golf clubs of Embodiments 7 and 8 are suitable. Therefore, golfers having a strong tendency to hook spin on the hit ball performed a hit test on the golf club of Example 7, the golf club of Example 8, and the golf club of Comparative Example 1. The golfer hit each of the golf clubs of Example 7, Example 8, and Comparative Example 1 with 50 balls, and calculated the average values of the flight distance and the bend (m) of each golf club to the first decimal place. Table 5 shows the results.

[0157]

[Table 5]

[0158] According to Table 5, compared with Comparative Example 1, Example 7
In the eighth embodiment, the flight distance is large and the bending is small. In other words, it can be seen that the golf clubs of Example 7 and Example 8 are suitable golf clubs that have a long flight distance and do not bend, especially for golfers who have a strong tendency to hit hooks on hit balls.

[0159]

As described above, according to the golf club of the present invention, by appropriately adjusting the deformation of the face plate at the time of hitting by the hitting position, the hitting ball can be less bent for various types of golfers. Thus, it is possible to provide a golf club having a long flight distance.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of a head mounted on a golf club of the present invention.

FIG. 2 is a cross-sectional view (a cross-sectional view along AA in FIG. 1) showing a head mounted on the golf club according to the first embodiment of the present invention.

FIG. 3 is a cross-sectional view showing a deformed state of the head of FIG. 2 when hitting a ball.

FIG. 4 is a cross-sectional view showing a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 5 is a cross-sectional view showing a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 9 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 10 is a front view showing a head mounted on the golf club of the present invention together with coordinate axes.

FIG. 11 is a cross-sectional view showing a modification of the head mounted on the golf club according to the first embodiment of the present invention.

FIG. 12 is a partially cutaway front view showing the head of FIG. 11;

FIG. 13 is a front view showing a head mounted on the golf club of the present invention together with coordinate axes.

FIG. 14 is a plan view showing a head mounted on the golf club of the present invention, together with dimension lines.

FIG. 15 is a cross-sectional view (a cross-sectional view along AA in FIG. 1) showing a head mounted on a golf club according to a second embodiment of the present invention.

16 is a cross-sectional view showing a deformed state of the head of FIG. 15 when hitting a ball.

FIG. 17 is a cross-sectional view showing another deformation state of the head of FIG. 15 when hitting a ball.

FIG. 18 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 19 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 20 is a cross-sectional view showing a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 21 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 22 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 23 is a cross-sectional view showing a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 24 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 25 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the second embodiment of the present invention.

FIG. 26 is a front view showing a head mounted on the golf club of the present invention together with coordinate axes.

FIG. 27 is a cross-sectional view showing a modification of the head mounted on the golf club according to the second embodiment of the present invention along with coordinate axes.

FIG. 28 is a cross-sectional view showing a modification of the head mounted on the golf club according to the second embodiment of the present invention along with coordinate axes.

FIG. 29 is a cross-sectional view showing a modified example of a head mounted on a golf club according to the second embodiment of the present invention, along with coordinate axes.

FIG. 30 is a cross-sectional view (a cross-sectional view along AA in FIG. 1) showing a head mounted on a golf club according to a third embodiment of the present invention.

31 is a cross-sectional view showing a deformed state of the head of FIG. 30 at the time of hitting a ball.

FIG. 32 is a cross-sectional view showing a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 33 is a cross-sectional view showing a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 34 is a cross-sectional view showing a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 35 is a cross-sectional view showing a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 36 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 37 is a cross-sectional view showing a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 38 is a cross-sectional view showing a modification of the head mounted on the golf club according to the third embodiment of the present invention.

FIG. 39 is a partially cutaway front view showing the head of FIG. 38;

FIG. 40 is a cross-sectional view (a cross-sectional view along AA in FIG. 1) showing a head mounted on a golf club according to a fourth embodiment of the present invention.

41 is a cross-sectional view showing a deformed state of the head of FIG. 40 when hitting a ball.

FIG. 42 is a cross-sectional view showing another deformed state of the head of FIG. 40 when hitting a ball.

FIG. 43 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 44 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 45 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 46 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 47 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 48 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 49 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 50 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention.

FIG. 51 is a cross-sectional view showing a modified example of a head mounted on a golf club according to a fourth embodiment of the present invention along with coordinate axes.

FIG. 52 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention along with coordinate axes.

FIG. 53 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fourth embodiment of the present invention along with coordinate axes.

FIG. 54 is a side view showing an example of a head mounted on the golf club of the present invention.

FIG. 55 is a cross-sectional view (a cross-sectional view taken along the line CC in FIG. 54) showing a head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 56 is a cross-sectional view showing a deformed state of the head of FIG. 55 when hitting a ball.

FIG. 57 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 58 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 59 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 60 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 61 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 62 is a cross-sectional view illustrating a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 63 is a front view showing a head mounted on the golf club of the present invention together with coordinate axes.

FIG. 64 is a cross-sectional view showing a modification of the head mounted on the golf club according to the fifth embodiment of the present invention.

FIG. 65 is a partially cutaway front view showing the head of FIG. 64.

FIG. 66 is a front view showing a head mounted on the golf club of the present invention together with coordinate axes.

FIG. 67 is a side view showing a head mounted on the golf club of the present invention together with dimension lines.

FIG. 68 is a cross-sectional view (a cross-sectional view taken along the line CC in FIG. 54) illustrating a head mounted on the golf club according to the sixth embodiment of the present invention.

69 is a cross-sectional view showing a deformed state of the head of FIG. 68 when hitting a ball.

70 is a cross-sectional view showing another deformed state of the head of FIG. 68 when hitting a ball.

FIG. 71 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 72 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 73 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 74 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 75 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 76 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 77 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 78 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention.

FIG. 79 is a front view showing a head mounted on the golf club of the present invention together with coordinate axes.

FIG. 80 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention along with coordinate axes.

FIG. 81 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention along with coordinate axes.

FIG. 82 is a cross-sectional view showing a modification of the head mounted on the golf club according to the sixth embodiment of the present invention, along with coordinate axes.

FIG. 83 is a cross-sectional view (a cross-sectional view taken along the line CC in FIG. 54) showing a head mounted on the golf club according to the seventh embodiment of the present invention.

84 is a cross-sectional view showing a deformed state of the head of FIG. 83 when hitting a ball.

FIG. 85 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 86 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 87 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 88 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 89 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 90 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 91 is a cross-sectional view showing a modification of the head mounted on the golf club according to the seventh embodiment of the present invention.

FIG. 92 is a partially cutaway front view showing the head of FIG. 91.

FIG. 93 is a cross-sectional view (a cross-sectional view taken along the line CC in FIG. 54) showing a head mounted on the golf club according to the eighth embodiment of the present invention.

94 is a cross-sectional view showing a deformed state of the head of FIG. 93 when hitting a ball.

FIG. 95 is a cross-sectional view showing another deformation state of the head of FIG. 93 when hitting a ball.

FIG. 96 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 97 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 98 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 99 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 100 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 101 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 102 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 103 is a sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention.

FIG. 104 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention along with coordinate axes.

FIG. 105 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention along with coordinate axes.

FIG. 106 is a cross-sectional view showing a modification of the head mounted on the golf club according to the eighth embodiment of the present invention along with coordinate axes.

FIG. 107 is a cross-sectional view showing a head mounted on a conventional golf club.

FIG. 108 is an overhead view showing a field of a hit ball test.

FIG. 109 is an explanatory diagram showing a gear effect in the toe-heel direction of the head.

FIG. 110 is an explanatory diagram showing a vertical gear effect of the head.

[Explanation of symbols]

 Reference Signs List 1 head 2 face plate 3 outer shell 4 hollow portion 5 reinforcing plate D1 to D12 distance between reinforcing plate and face plate d1 to d12 deformation amount of face plate

Claims (10)

[Claims] 1. A golf club having a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on a front surface thereof, and a head having a hollow portion formed therein. A reinforcing plate is provided at a position apart from the face plate in the hollow portion along a specific portion of the face plate, and a distance between the reinforcing plate and the face plate is reinforced by a face plate deformed by hitting a ball. A golf club set at a distance that can contact the plate. 2. A golf club comprising: a face plate having a face surface for hitting a ball; and an outer shell having the face plate disposed on a front surface, and having a head having a hollow portion formed therein. Along with the face plate, a reinforcing plate is provided at a position away from the face plate in the hollow portion, and a distance between the reinforcing plate and the face plate is gradually increased from a specific portion of the face plate to another portion. In the shortest part, the golf club is set to a distance at which the face plate deformed by hitting the ball can contact the reinforcing plate. 3. A golf club having a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on a front surface thereof, and a head having a hollow portion formed therein. , Along only the top of the face plate,
A golf club in which a reinforcing plate is provided at a position apart from the face plate in the hollow portion, and a distance between the reinforcing plate and the face plate is set to a distance at which a face plate deformed by hitting a ball can contact the reinforcing plate. 4. A golf club having a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on a front surface thereof, and a head having a hollow portion formed therein. Along with the face plate, a reinforcing plate is provided at a position away from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the upper portion to the lower portion of the face plate, and the shortest portion is formed. In the golf club, the distance is set so that the face plate deformed by the impact of the ball can contact the reinforcing plate. 5. A golf club comprising: a face plate having a face surface for hitting a ball; and an outer shell having the face plate disposed on a front surface, and having a head having a hollow portion formed therein. , Along only the lower part of the face plate,
A golf club in which a reinforcing plate is provided at a position apart from the face plate in the hollow portion, and a distance between the reinforcing plate and the face plate is set to a distance at which a face plate deformed by hitting a ball can contact the reinforcing plate. 6. A golf club having a face plate provided with a face surface for hitting a ball, an outer shell having the face plate disposed on a front surface thereof, and a head having a hollow portion formed therein. Along with the face plate, a reinforcing plate is provided at a position apart from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the lower portion to the upper portion of the face plate, and the shortest portion is formed. In the golf club, the distance is set so that the face plate deformed by the impact of the ball can contact the reinforcing plate. 7. A golf club comprising: a face plate having a face surface for hitting a ball; and an outer shell having the face plate disposed on a front surface, and having a head having a hollow portion formed therein. A reinforcing plate is provided at a position apart from the face plate in the hollow portion only along the heel portion of the face plate, and a distance between the reinforcing plate and the face plate is reinforced by a face plate deformed by hitting a ball. A golf club set at a distance that can contact the plate. 8. A golf club having a face plate having a face for hitting a ball, an outer shell having the face plate disposed on a front surface thereof, and a head having a hollow portion formed therein. Along the face plate, a reinforcing plate is provided at a position away from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the heel portion to the toe portion of the face plate. In a short part, the golf club is set to a distance at which the face plate deformed by hitting the ball can contact the reinforcing plate. 9. A golf club having a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and a head having a hollow portion formed therein. A reinforcing plate is provided at a position apart from the face plate in the hollow portion only along the toe portion of the face plate, and the distance between the reinforcing plate and the face plate is reinforced by a face plate deformed by hitting a ball. A golf club set at a distance that can contact the plate. 10. A golf club having a face plate having a face surface for hitting a ball, an outer shell having the face plate disposed on the front surface, and a head having a hollow portion formed therein. Along the face plate, a reinforcing plate is provided at a position apart from the face plate in the hollow portion, and the distance between the reinforcing plate and the face plate is sequentially increased from the toe portion to the heel portion of the face plate. In a short part, the golf club is set to a distance at which the face plate deformed by hitting the ball can contact the reinforcing plate.