JP2021049112A - Golf club for practice - Google Patents

Abstract

To provide a golf club for practice in which a correct swing trajectory of the golf club can be acquired by experience simply and correctly.SOLUTION: A golf club 1 for practice is mainly comprised of a shaft part 2, a head part 3, and a supporting part 4. The shaft part 2 and the head part 3 are separated, and then are fastened by the supporting part 4 so that an axis line L1 of the shaft part 2 and an axis line L2 of a hosel part 32 of the head part 3 may become substantially parallel. The supporting part 4 is comprised of a bolt part 41 and a nut part 42. The head part 3 is swingable by using a shaft substantially perpendicular to an axis line L1 of the shaft part 2 as a rotating shaft R with respect to the shaft part 2.SELECTED DRAWING: Figure 1

Description

The present invention relates to a practice golf club. More specifically, the present invention relates to a practice golf club that can easily and accurately acquire the correct swing trajectory of the golf club.

Traditionally, golf has been one of the most popular and widely enjoyed sports for men and women of all ages, and it has been recognized that it is a sport that can improve the score by learning the correct swing form and course management. ing.

In order to learn the correct swing form, golfers learn swing theory by themselves while watching lesson books and lesson videos, and then practice repeatedly at the driving range or go to a golf school and receive direct guidance from an instructor. While receiving the training, I am trying to improve my score every day, aiming to acquire a golf form that suits me.

On the other hand, most amateur golfers are not even able to cut the score of "100", which is a barrier, because the results of their daily practice are vacant. As in recent years, as a result of rapid technological advances in tools such as golf clubs and golf balls, it has become commonplace for professional golfers to have an average flight distance of over 300 yards. Even if you can easily acquire the golf swing theory of golf at home, the skills of general amateur golfers have not improved from the level of decades ago when golf began to spread as a general sport. ..

Generally, in golf, if you can wear a certain basic swing and get the flight distance for each golf club count, even if the shot turns to the left or right, the rest depends on the course management. Of course, it is possible to make a round in the 80s as an average score. However, as mentioned above, based on the reality that many amateur golfers are sluggish with a score of around 100, the problem before course management is that there are overwhelmingly many golfers who do not even wear a basic golf swing. be able to.

In this way, it is said that one of the factors that make golf swing difficult for amateur golfers is the peculiarity of the structure of the golf club. That is, since a heavy head is attached to the tip of the shaft of a golf club, the head always behaves in the direction in which the face surface of the head opens and closes with the shaft axis as the base point due to the moment of inertia around the shaft axis during the swing. It becomes.

Therefore, based on the natural behavior of a golf club, the face surface opens on takeback, gradually closes on a downswing from the top, and the face surface faces the target flight line direction at the position where it contacts the ball. Ideally, it is in a state, and then it is natural that the face surface gradually closes toward the follow.

However, in recent years, heads have tended to be larger in order to expand the sweet spot, and not only drivers and other wood clubs, but even irons are becoming mainstream. In such a large head, it is possible to keep the face surface as square as possible (shut state) during the swing from takeback to top, top to downswing, and impact. It is very important to fly the ball to the target position.

However, many amateur golfers have a square face due to overuse of the wrist (cock) during the swing, an extremely inside trajectory, or an extremely outside trajectory. It is often difficult to keep it in a state. Therefore, the face surface in the impact zone is not constant, and in many cases, slices, pushouts, and shanks, which are typical trajectories of amateur golfers, occur frequently.

Therefore, practice equipment for checking whether the face surface is square at the time of addressing or swinging has been proposed. For example, Patent Document 1 discloses a golf practice device made of a plate-like body that is removable from the head and imitates the shape of the face surface of the head having an area one size larger than the face surface of the head. ..

Japanese Unexamined Patent Publication No. 2016-137113

In the invention according to Patent Document 1 described above, swing practice can be performed while visually confirming the face surface during the swing. However, in the practice equipment according to Patent Document 1, the swing is brought closer to the ideal swing while checking the arrangement and movement of the body such as shoulders, hips, knees, elbows, and hands so that the face surface always faces the target direction. I had to practice.

In this regard, the inventor of the present application is trying to remind the general amateur golfer how to use the body to get closer to the ideal swing plane as one of the reasons why it is difficult for general amateur golfers to improve with respect to the amount of practice. I thought there was a problem with the way it should be.

That is, the physique is different for each person, and even for the same person, the muscle mass and flexibility are constantly changing with aging. Even though each such person has a different body, even if the lesson teaches how to use a standardized body to perform the ideal swing, it is very difficult for everyone to make the same movement every time. Is difficult. In addition, the golfer always swings while checking the checkpoint of the body movement with the brain during the swing, which has to be a very awkward exercise.

Therefore, the inventor of the present application focuses on making a swing centered on a golf club that does not change, rather than focusing on making a swing centered on a constantly changing body. I thought that I could learn a swing with high reproducibility based on a simpler idea without having to think about it.

And, in aiming to make a swing centered on a golf club, since the golf club has a special structure as described above, considering that the golf club is one tool, the focus is on how to move the body as before. There is no choice but to make a swing. On the other hand, the golf club is composed of two parts, the shaft and the head, and the role of each part is clarified, such as the role of swinging the shaft and the role of hitting the ball, and the golfer's thinking during the swing. By keeping it simple, I came up with the idea that everyone, regardless of age or sex, and whether or not they have physical abilities, can master the ideal swing.

The present invention has been devised in view of the above points, and an object of the present invention is to provide a practice golf club capable of easily and accurately acquiring the correct swing trajectory of the golf club.

In order to achieve the above object, the practice golf club of the present invention has a shaft portion having a grip portion on one end side, a head portion having a main body portion including a face surface for hitting a golf ball, and the shaft portion. On the other end side, a support portion that swingably supports the head portion is provided with an axis substantially perpendicular to the length direction of the shaft portion as a rotation axis.

Here, by providing the shaft portion having the grip portion on one end side, when swinging the practice golf club, the user can grip the grip portion and swing while feeling the bending of the shaft portion.

Further, by providing the head portion having the main body portion including the face surface for hitting the golf ball, the user can swing while feeling the rotation of the head portion when swinging with the practice golf club, and the head. The ball can be hit on the face surface of the part.

Further, by providing a support portion on the other end side of the shaft portion that swingably supports the head portion with an axis substantially perpendicular to the length direction of the shaft portion as a rotation axis, the user's thinking in the operation during the swing. As the shaft part is a part for swinging and the head part is a part for hitting a ball, the roles of the shaft part and the head part can be clarified, so it is necessary to learn a highly reproducible golf swing. Can be done.

That is, the head portion attached to the tip (the other end) of the shaft portion swings according to the behavior of the golf swing. For example, at the start of the swing, the head portion is extremely inside or out with respect to the flying ball line. If you take back to the side, the head part is fixed and does not swing.

In this respect, the user can intuitively understand how to move the golf club in order to swing the head part efficiently, so the user is concerned about how to use the complex body during the swing. You can concentrate on the swing centered on the golf club and think of the golf swing as a simpler one without being taken.

Furthermore, the user pays attention to the behavior of the head part and keeps in mind the swing that keeps the face surface of the head part constant from takeback, downswing, and follow, so from the rotational movement around the swing axis to the impact zone. It becomes possible to grasp the movement of the golf club more simply to the linear movement centered on.

Further, the head portion includes a hosel portion extending from the neck portion of the main body portion, and the support portion supports the head portion and the shaft portion so that the axis of the shaft portion and the axis of the hosel portion are substantially parallel to each other. In this case, since the head portion and the shaft portion are visually separated, the user can be more clearly aware of each part of the head portion and the shaft portion.

Further, when the support portion is composed of a first through hole formed in the hosel portion, a bolt portion penetrating the second through hole formed in the shaft portion, and a nut portion screwed into the bolt portion. Since the shaft portion and the head portion can be fastened with bolts and nuts, the shaft portion and the head portion can be fastened with a simple fastening structure.

Further, the nut portion includes a first nut portion interposed between the hosel portion and the shaft portion, and a second nut portion that is on one end side of the bolt portion and sandwiches the shaft portion together with the first nut portion. Since the shaft portion is sandwiched between the first nut portion and the second nut portion, it is possible to prevent the shaft portion from swinging with respect to the bolt portion during the swing.

The practice golf club according to the present invention can easily and accurately acquire the correct swing trajectory of the golf club.

It is an overall external view of the practice golf club which concerns on embodiment of this invention. It is a figure which shows the swing state of a head part. It is a figure which shows the behavior of the head when swinging using the practice golf club which concerns on embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings for the purpose of understanding the present invention. For convenience of explanation, the practice golf club is for right-handed use, and in the reference state where the head portion is installed according to a predetermined lie angle and loft angle with respect to the installation surface, the direction is upward from the installation surface of the head portion. Is defined as the upward direction, the opposite direction of the upward direction is defined as the downward direction, and the axial direction represented by the upward and downward directions is defined as the vertical direction. , The direction substantially perpendicular to the direction of the flying ball is defined as the front-back direction.

First, the practice golf club 1 according to the embodiment of the present invention will be described with reference to FIGS. 1 and 2. The practice golf club 1 is mainly composed of a shaft portion 2, a head portion 3, and a support portion 4.

The shaft portion 2 is provided with a steel main body portion 21 and a rubber grip portion 22 for gripping when the user swings on one end side of the main body portion 21.

Here, the main body 21 of the shaft portion 2 does not necessarily have to be made of steel. For example, it can be appropriately selected from carbon and other materials.

Further, the grip portion 22 does not necessarily have to be made of rubber. For example, it can be appropriately selected from a resin material other than rubber and other materials.

The head portion 3 has a predetermined loft angle and lie angle, and has a face surface 31b in which a plurality of score lines 31a, which are horizontally long grooves, are formed in the vertical direction, and a back face (back face) which is the back surface of the face surface 31b. It is composed of a main body portion 31 (not marked) and a hosel portion 32 extending from the main body portion 31.

Here, the head portion 3 does not necessarily have to have an iron shape as shown in each figure. The head portion 3 may have, for example, a wood shape (driver, fairway wood, utility).

Further, the score line 31a does not necessarily have to be formed on the face surface 31b. For example, when the practice golf club 1 is a golf club dedicated to swinging without assuming the hitting of a ball, it is not necessary to form the score line 31a.

The head portion 3 is attached to the shaft portion 2 via a support portion 4 so that the axis L1 of the shaft portion 2 and the axis L2 of the hosel portion 32 of the head portion 3 are parallel to each other, and the head portion 3 is a shaft. The axis line substantially perpendicular to the axis line L1 of the portion is defined as the rotation axis R, and is swingable in the direction indicated by the arrow in FIG.

Here, the head portion 3 does not necessarily have to be attached so that the axis L1 of the shaft portion 2 and the axis L2 of the hosel portion 32 are parallel to each other. For example, the axis L1 of the shaft portion 2 and the axis L2 of the hosel portion 32 may be attached so as to coincide with each other. In that case, the head portion 3 is separated into a main body portion 31 and a hosel portion 32 at the neck portion 33, and the main body portion 31 is swingably supported with respect to the hosel portion 32.

When the axis L1 of the shaft portion 2 and the axis L2 of the hosel portion 32 are attached so as to be parallel to each other, the practice golf club 1 is composed of two parts, the head portion 3 and the shaft portion 2. You can visually recognize that you are doing it. Therefore, as a user's thought in the movement during the swing, the shaft part 2 is a part for swinging, the head part 3 is a part for hitting a ball, and the roles of the shaft part 2 and the head part 3 are clearly recognized. Therefore, it can be expected to learn a golf swing with high reproducibility.

At this time, in the reference state when addressing using the practice golf club 1, the axis L2 of the hosel portion 32 is on the ball side (front side) with respect to the axis L1 of the shaft portion 2 when viewed from the user's point of view. Or, it may be attached at any position on the rear side opposite to the opposite side. However, as shown in FIGS. 1 and 2, the axis L2 of the hosel portion 32 is located on the ball side with respect to the axis L1 of the shaft portion 2, so that the practice golf club 1 has the head portion 3 and the shaft portion 2. The visual effect of being composed of these two parts is further enhanced.

The support portion 4 is a mounting tool for swingably attaching the head portion 3 to the shaft portion 2, and is mainly composed of a bolt portion 41 and a nut portion 42 screwed into the bolt portion 41.

The bolt portion 41 has a head (not marked) at one end, and a screw portion (not marked) is inserted through the hosel portion 32 and the shaft portion 2. Specifically, a screw is formed in a first through hole 43 formed in a direction substantially orthogonal to the axis L2 of the hosel portion 32 and a second through hole 44 formed in a direction substantially orthogonal to the axis L1 of the shaft portion 2. The part is inserted.

The nut portion 42 has a first nut portion 42a interposed between the hosel portion 32 and the shaft portion 2, and a second nut portion 42b screwed to the other end side of the bolt portion 41. By narrowing the shaft portion 2 by the first nut portion 42a and the second nut portion 42b, the shaft portion 2 is firmly fixed to the bolt portion 41 so as not to swing.

On the other hand, the hosel portion 32 is loosely fitted to the bolt portion 41. Therefore, the head portion 3 is supported so as to be swingable with an axis substantially perpendicular to the axis L1 of the shaft portion 2 as a rotation axis R. A third nut portion 42c as a spacer or a position adjustment may be provided between the hosel portion 32 and the head portion of the bolt portion 41.

Here, the support portion 4 does not necessarily have to be composed of the bolt portion 41 and the nut portion 42. Any fastening structure may be used as long as the head portion 3 can be attached to the shaft portion 2 so as to be swingable.

An example of using the practice golf club 1 configured as described above will be described with reference to FIG. First, the user sets the practice golf club 1 so that the score line 31a (or the leading edge) of the face surface 31b faces the target direction at the time of addressing.

When shifting from the address state to the backswing, the head portion 3 gradually moves toward the rear of the flying ball line. For example, the head portion 3 is pulled extremely inside (outside) or the face surface 31b is opened. If the operation (turning the face surface 31b vertically upward) is performed, the head portion 3 does not swing, or the head portion 3 rotates in the same direction as the rotation direction of the backswing.

Then, when the face surface 31b is opened extremely, the user's right hand during the swing is positioned vertically downward with respect to the left hand. As a result, the weight of the head portion 3 is strongly felt on the right hand side of the user, the right hand of the user is broken toward the back side, and the face surface 31b behaves in the direction of further opening.

When the downswing is performed with the face surface 31b open, the ball is contacted with the face surface 31b open in the impact zone (facing to the right with respect to the launch direction when viewed from the rear of the flying ball line). As a result, the hit ball is subjected to slice rotation, and the ball hits the slice ball or the neck portion 33 of the head portion 3 to cause pushout.

On the other hand, in the backswing, as shown in FIG. 3, the head swingably supported with respect to the shaft portion 2 when the user is aware that the head portion 3 is pulled in the horizontal direction toward the rear of the flying ball line. The portion 3 receives and swings in a direction opposite to the rotation direction of the backswing (user side) due to the action of gravity, and the face surface 31b is in a closed state, that is, the face surface 31b is in a direction facing the ground.

When the shaft portion 2 is substantially parallel to the ground, the user's right hand is located vertically above the left hand, so that the weight of the head portion 3 acts directly on the palm of the user's right hand. Never. Therefore, the user's right hand is in a square state where the angle between the arm and the back of the hand is not set without breaking toward the back side, or is in a state where the user's right hand is slightly broken toward the palm side.

When the backswing is changed to the downswing in such a state, the head portion 3 rotates in the swing direction, and the face surface 31b contacts the ball in a square state or a slightly closed state. As a result, since the hit ball is subjected to straight rotation or slightly draw rotation, it is possible to hit a ball that is straight and has little bending in the direction of the flying ball line.

As described above, by a series of swings using the practice golf club 1, the user efficiently behaves the head portion 3 from the conventional body-centered swing creation of how to use the body in the swing process. It is possible to shift the consciousness of the golf swing to the swing making centered on the golf club, which is how to operate the golf club.

At that time, since the practice golf club 1 has a structure in which the head portion 3 and the shaft portion 2 are separated, the golf club is not used as one tool but is composed of two parts, the head portion 3 and the shaft portion 2. It can be recognized as a tool that has been used. Therefore, by clarifying the roles of the respective parts, such as the shaft portion 2 having the role of swinging and the head portion 3 having the role of hitting the ball, the golf swing can be grasped with a simpler idea.

As described above, the practice golf club according to the present invention can easily and accurately acquire the correct swing trajectory of the golf club.

1 Practice golf club 2 Shaft part 21 Main body part 22 Grip part 3 Head part 31 Main body part 31a Score line 31b Face surface 32 Hosel part 33 Neck part 4 Support part 41 Bolt part 42 Nut part 42a First nut part 42b Second Nut part 42c Third nut part 43 First through hole 44 Second through hole L1, L2 Axis line R Rotating shaft

Claims (4)

A shaft part with a grip part on one end side and
A head part having a main body part including a face surface for hitting a golf ball,
A practice golf club including a support portion on the other end side of the shaft portion that swingably supports the head portion with an axis substantially perpendicular to the length direction of the shaft portion as a rotation axis. The head portion includes a hosel portion extending from a neck portion of the main body portion.
The practice golf club according to claim 1, wherein the support portion supports the head portion and the shaft portion so that the axis of the shaft portion and the axis of the hosel portion are substantially parallel to each other. The support portion
A first through hole formed in the hosel portion, a bolt portion penetrating the second through hole formed in the shaft portion, and a bolt portion.
The practice golf club according to claim 2, which is composed of a nut portion screwed into the bolt portion. The nut part
A first nut portion interposed between the hosel portion and the shaft portion,
The practice golf club according to claim 3, further comprising a second nut portion that is one end side of the bolt portion and sandwiches the shaft portion together with the first nut portion.

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