JP6800489B2 - Golf club - Google Patents

Description

The present invention relates to a golf club, and more particularly to a golf club in which a golf swing that correctly uses the power of the right hand can be acquired.

It is a common consciousness for both professionals and amateurs to improve the golf swing, and from this, various training equipments for improving the golf swing have been proposed.
For example, Patent Document 1 describes an accommodating portion into which a golf club grip is inserted and a protruding portion for setting a golf club grip position for the purpose of consistently maintaining a gripping posture of a hand during a golf swing. When the grip of the golf club is inserted into the accommodating portion, the golf club is interposed between the accommodating portion and the grip of the golf club. A first guide that guides the movement of the grip, and when the grip of the golf club is inserted into the accommodating portion, the auxiliary grip body is pulled out of the accommodating portion so as to be closely fixed to the grip of the golf club. The first guide member includes a member, the first grip portion is exposed to the outside of the accommodating portion to provide a grip surface, and the first grip portion is retractably inserted into the accommodating portion to grip the golf club. A first guide portion for guiding the movement of the golf club is provided, and the first grip portion includes a guide hole for guiding the grip of the golf club to the accommodating portion when the grip of the golf club is inserted into the accommodating portion. Auxiliary for golf clubs, which is formed at a predetermined depth along the outer periphery, and has a fixing groove for fixing one end of the accommodating portion to the auxiliary grip body. Grips have been proposed.
Further, Patent Document 2 solves the problem that the conventional gripping orthodontic appliance cannot be attached to a golf club already owned for practice and cannot be actually hit and felt. It is a fitting that is attached to the grip of a golf club you have and corrects the grip to the correct grip by actually hitting it. In the case of right-handed golf (the opposite of left-handed golf) when the address is taken. While covering the position where you hold the left hand of the club from the outside, provide a center mark line on the upper surface of the grip and on the extension line of the grip center line, and emit one end from the center mark line. A spatula is provided in the direction of 20 to 40 degrees like a shark's back fin, and the opposite side of the center mark line (the lower surface side of the grip) is cut out with a width of several centimeters, and a mounting opening is provided from the spatula to the tip. A detachable golf grip grip correction tool has been proposed, which is characterized in that a grip space is provided symmetrically by cutting further from the edge of the mounting opening with the central mark line sandwiched between the spaces and the position where the right hand medicine finger hits. ..
Further, Patent Document 3 describes a shaft in which a head for hitting a golf ball is formed at the tip on one side, and a grip provided at the tip on the other side of the shaft in a form of wrapping the shaft and serving as a handle. A golf club including, a center of gravity S in which the weight of the golf club is concentrated is provided on the axis of the shaft at a specific position provided inside the grips of both hands, and the shaft is provided. A single shaft is cut and separated into a lower first shaft on the club head side and an upper second shaft on the grip side of the club near the lower entrance of the grip, and one connecting rod is sandwiched therein. A golf club has been proposed, which is assembled so as to form a golf club, wherein the connecting rod is made of a plastic or a lightweight metal material.

WO2015 / 016620 Japanese Patent No. 5769185 WO2012 / 07790

However, in the above proposals, although each has its own effect, how to use the right hand (in the case of right-handed person, in the case of left-handed person, how to use the left hand, in short, how to use the dominant hand. Hereinafter, in the present specification, When we talk about how to use the right hand, we mean how to use the dominant hand).
In a golf swing, it is important for both professionals and amateurs to "do not let the right hand do bad things", that is, to swing with the left hand and "use the power of the right hand correctly". Looking carefully at the grip part at the professional address that was up on the TV, it is a common behavior to relax while moving the thumb and index finger of the right hand and try not to hold it strongly, and the flight distance This consciousness is especially strong when you want to put out a sword or when you have a delicate approach.

Therefore, an object of the present invention is to provide a golf club in which a golf swing that correctly uses the force of the right hand can be acquired.

As a result of diligent studies to solve the above problems, the present inventors have shortened the grip length of the golf club, and in addition, the right thumb and index finger when a normal right-handed golfer grips the club By making the part that touches the grip extremely thin, you can prevent false force from being applied to the club with these two fingers when swinging, and as a result, swing with the correct distribution of power led by the left hand and swing on the correct swing plane. It is a golf club that makes it easy to wear a swing that gives a long distance.

It has been found that the above object can be achieved, and the present invention has been completed.
That is, the present invention provides the following inventions.
1. 1. In a golf club having a shaft and a grip portion connected to the shaft,
At least a small diameter portion having a diameter smaller than the outer diameter of the grip portion is provided at the end portion of the grip portion on the shaft side.
Alternatively, a golf club having a shaft different from the shaft of the shaft and the shaft of the grip portion, and having a connecting member arranged between the shaft and the shaft of the grip portion at a predetermined distance.
Since the index finger and thumb of the right hand are located in this small diameter portion due to the provision of this small diameter portion, it becomes difficult to apply force to the index finger and thumb of the right hand due to the difference in outer diameter from the grip portion, resulting in the right hand. You will be able to use it correctly.
2. 2. 1. The golf club according to 1, wherein the outer diameter of the small diameter portion is smaller than the outer diameter of the shaft and is 0.3 to 1.2 cm.
The small diameter part is thinner in comparison with the shaft and grip, especially in comparison with the grip part. By having an outer diameter within the above range, the right hand does not bend more than a normal golf club with the small diameter as a fulcrum during a swing, exhibits sufficient strength, and does not put extra force on the right hand. Can be used correctly.
3. 3. 1. The length of the grip portion is 7 to 20 cm, and the small diameter portion has a length of 5 to 15 cm between the end portion of the shaft and the grip portion. Golf club.
By providing the small diameter portion at such a position, the small diameter portion is located at the portion where the index finger and thumb of the right hand rest when the user grips the grip. The length is also such a position. As a result, only the little finger, ring finger, and middle finger of the right hand's fingers are stressed, and the correct usage of the right hand is learned.
4. The small diameter portion is formed by a connecting member that connects the shaft and the grip portion.
The connecting member includes a shaft connecting portion fixed to the end of the shaft, a grip forming portion that forms a grip portion by attaching a grip member, and a portion that is located between the two and has an outer diameter smaller than that of both. 1. The golf club according to 1, wherein the golf club has a small diameter portion formed by this portion.
In this way, by providing a connecting member that includes a small diameter portion and is connected to the shaft and also forms a grip portion, it is stable even if a small diameter portion having a small diameter is provided between the grip and the shaft. It is possible to swing.

The golf club of the present invention can acquire a golf swing that correctly uses the power of the right hand.

FIG. 1 is a perspective view of a golf club of the embodiment. FIG. 2 is a perspective view showing only the connecting member in the golf club shown in FIG. FIG. 3 is an exploded perspective view of the golf club shown in FIG. FIG. 4 is a perspective view showing a usage mode of the golf club shown in FIG. FIG. 5 is a perspective view showing another embodiment of the golf club of the present invention.

1: Golf club, 10: Shaft, 20: Grip part, 36: Small diameter part

Hereinafter, the present invention will be described in more detail.
The golf club 1 of the present embodiment has a shaft 10 and a grip portion 20 connected to the shaft 10 as shown in FIGS. 1 to 3.
The present embodiment is characterized in that a small diameter portion 36 having a diameter smaller than the outer diameter of the grip portion is provided between the shaft 10 and the grip portion 20.
In the present specification for explaining the present invention, the shaft and the grip are shown in a state where the golf club is viewed from the side as shown in FIG. 1, respectively. That is, in a golf club, the shaft and the grip usually form a grip by covering the end of the shaft material constituting the shaft with a grip member to make it easier for the user to grip, and in the description of the present invention. The question is which part is called the shaft and which part is called the grip. In the present specification, it does not matter what kind of member configuration it has, and the part where the grip member is provided so that the user can grip it is called a grip part, and a rod-shaped body (normal shaft) connected to the club head. The material) part is called the shaft.
This will be described in more detail below.

〔shaft〕
The shaft 10 has the same shape as a normal golf club, and although not particularly shown, a club head is arranged at the tip thereof. The golf club of the present embodiment differs from a normal golf club in its length. A normal golf club has a length capable of forming a grip portion by attaching a grip member (member indicated by reference numeral 22 in the present embodiment) for forming the grip portion on the base end side. However, in the shaft of the present embodiment, the shaft is formed to be shorter by the length of the connecting member so that the connecting member described later is attached and the length is the same as that of a normal golf club.
The material for forming the shaft 10 can be used without particular limitation, such as a material usually used for golf clubs, for example, wood, a composite material containing carbon fiber, steel, a titanium alloy, or the like.
[Grip part]
In the present embodiment, the grip portion 20 is formed by attaching the grip member 22 to one end of the connecting member 30 as described later. As the material for forming the grip member 22, the material usually used for forming the grip can be used without particular limitation, but leather, rubber, resin compound and the like can be used.

[Small diameter part]
The small diameter portion is formed by a connecting member 30 that connects the shaft and the grip portion. The connecting member 30 is located between the shaft connecting portion 32 fixed to the end of the shaft 10, the grip forming portion 34 that forms the grip portion 20 by attaching the grip member 22, and the outside of both. It has a small diameter portion 36 having a small diameter, and the small diameter portion 36 has a rod shape, and both ends thereof are directly extended or connected to a grip forming portion and a shaft connecting portion. The shaft connecting portion 32 has a hollow inside and has a U-shaped cross section. Then, it is attached by inserting the end portion of the shaft into this hollow portion. The grip forming portion 34 has substantially the same outer diameter as the shaft connecting portion 32, and is formed so as to have the same length as the grip portion 20 when the grip member 22 is attached so as to cover the entire outer surface thereof. The outer diameter of the grip forming portion 34 and the inner diameter of the grip member 22 are substantially the same, so that the grip member 22 can be brought into close contact with the grip forming portion 34 to exhibit good holdability.
The outer diameter of the small diameter portion 36 is smaller than the outer diameter of the grip, and in the present embodiment, is smaller than the outer diameter of the shaft 10. In particular, the difference in outer diameter with respect to the outer diameter of the grip is important, and the larger the difference in outer diameter, the less force is applied to the index finger and thumb of the right hand. On the other hand, if the outer diameter of the small diameter portion is too small, the small diameter portion may break when swinging with the golf club of the present embodiment. It is important to keep the balance, and from this viewpoint, the outer diameter of the small diameter portion 36 is smaller than the outer diameter of the shaft 10, preferably 0.3 to 1.2 cm, and further 0.5 to 1 cm. Is preferable. The outer diameter of the shaft 10 is the outer diameter of the portion adjacent to and exposed to the small diameter portion 36, and is usually in the range of 1.5 cm ± 0.5 cm.
Also, the position of the small diameter portion is important. That is, it is necessary to position the small diameter portion so that the grip is positioned to the optimum position as a golf club when the grip is held and the index finger and thumb of the right hand are positioned on the small diameter portion. In a normal golf club, the length of the grip portion is 20 to 30 cm, but in the golf club of the present embodiment, the length of the grip portion 20 is preferably 7 to 20 cm, more preferably 7 to 17 cm. The length of the grip forming portion 34 is also preferably the same. Further, the small diameter portion 36 preferably has a length of 5 to 20 cm from the end portion of the shaft 10 to the grip portion 20, and further preferably a length of 5 to 15 cm.
The connecting member 30 including the small diameter portion 36 can be formed by using various materials, but it is preferably formed by a material having a certain degree of hardness. Examples of such a material include steel, titanium alloy, carbon fiber reinforced plastic, hard resin such as polycarbonate and vinyl chloride, and aluminum material. When the small diameter portion 36 is formed by using carbon fiber reinforced plastic, the shaft connecting portion 32 and the grip forming portion 34 are formed by using different materials, and each member formed of different materials is formed. It is preferable to connect them to form the connecting member 30.

[Manufacturing]
The golf club of the present embodiment can be obtained as follows. That is, the shaft 10 and the grip member 22 are formed according to a conventional method, and the connecting member 30 is formed by a method such as injection molding if it is made of resin, or by a method such as casting using a mold if it is made of metal. To do. Then, as shown in FIG. 3, the end portion of the shaft is inserted into the hollow portion inside the shaft connecting portion 32 of the connecting member 30 and fixed via an adhesive or the like. Further, the golf club of the present embodiment can be obtained by mounting the grip member 22 so as to cover the entire outer surface of the grip forming portion 34.

〔how to use〕
As shown in FIG. 4, grip the end side of the grip portion 20 away from the shaft 10 with the left hand, place the right hand on the shaft side, grasp the thick part of the little finger, ring finger, and middle finger of the right hand, and hold the index finger and thumb of the right hand. Grip so that it is located on the small diameter portion 36. Then, it can be used by swinging in the same manner as a normal golf swing. The golf swing can be practiced by repeating the use in this way as appropriate.

[Action effect]
The golf club of the present embodiment is one of the most impediments to the improvement of golf in a person who has a habit of applying force such as kneading with the fingertip of the right hand when swinging in a normal golf club. However, it is formed so that the small diameter portion 36 is located at the part pressed by the index finger and thumb of the right hand, and in a normal club, the index finger and thumb of the right hand (the hand located closer to the head) are unnecessary for swinging. In the present invention, the part where the index finger and thumb of the right hand are located is extremely thin in the normal grip, so that the force is not applied to these fingers, it is difficult to knead, and the correct swing can be performed. it can. That is, the force distribution is inevitably correct when swinging. By practicing continuously, the right finger will feel this correct feeling, the swing plane will be correct, and the flight distance will be extended. In addition, the little finger, ring finger, and middle finger of the right hand, which gives a sense of unity with the left hand, can be gripped normally, so you can learn how to use the right hand correctly, not just because the right hand is not stressed.
From these facts, by practicing the swing using the golf club of the present invention, it is possible to unknowingly understand the force distribution of the left and right fingers during the swing and the feeling of not applying force to the index finger and thumb of the right hand. Then, you will acquire the ideal swing in which the left hand leads on the correct swing plane and hits with the power of the right hand.

Then, another embodiment of the present invention will be described with reference to FIG. For convenience of explanation, the same parts as those in the above-described embodiment are designated by reference numerals in the 100s, and the description is omitted, and different parts will be particularly described. The description in the above-described embodiment is valid for points not particularly described.
The golf club 100 of the embodiment shown in FIG. 5 has a shaft different from the shaft of the shaft 110 and the grip portion 120, and a connecting member 130 for connecting the shaft 110 and the grip portion 120 at a predetermined interval is arranged between the shafts 100. That is, the shaft 110 and the grip portion 120 are not directly connected, and a gap 140 in which no member exists is provided between the shaft 110 and the grip portion 120. And the connecting member 130. A shaft connecting portion 133 connected to the end portion of the shaft 11 and a grip connecting portion 132 connected (or integrally molded) to the end portion of the grip portion 120 (the end portion located on the opposite side of the shaft 110). It has a connecting shaft 131 connected to both the shaft connecting portion 133 and the grip connecting portion 132. A shaft different from the shafts of the shaft 110 and the grip portion 120 is formed by the connecting shaft 131. Further, the shaft connecting portion 133 and the grip connecting portion are each narrow plate-like bodies, and are formed so as to be connected (or integrally molded) to the shaft 110 or the grip portion 120 and the connecting shaft 131 at both ends thereof. ing.
In the golf club of the present embodiment formed in this way, when the grip portion is gripped, the index finger and thumb of the right hand (in many cases, the dominant hand and the hand located on the head side) cannot grip anything. Therefore, it is possible to avoid a situation in which the right hand is bad due to excessive force applied to these fingers as a result, and it is possible to get into the habit of swinging without exerting force on these fingers. As a result, you will acquire the correct swing.

The present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, both ends of the small diameter portion may have an exponential taper, and this taper may be a linear taper.
Further, in the above-described embodiment, the case where the small diameter portion is formed by the connecting member is illustrated and described, but the small diameter portion may be formed by using the member constituting the shaft, and the member constituting the grip portion. It may be configured by using a member different from the above. Further, unlike the connecting member, the small diameter portion may be a single component by itself, or may be integrally formed with the shaft or the grip.
Further, the shaft and the small diameter portion may be formed in the same member, and the outer diameters of both may be the same. That is, the length of the small diameter portion has a length up to the head, and the small diameter portion and the shaft may be integrated. In this case, a shaft having the same outer diameter as the small diameter portion (the small diameter portion itself) is connected to the club head.
Further, a cover made of a flexible material such as urethane may be attached to the small diameter portion.

Hereinafter, the present invention will be described in more detail with specific examples, but the present invention is not limited thereto.
[Examples 1 to 3 and Reference Examples 1 to 3]
A golf club having the form shown in FIG. 1 was created based on the outer diameter of the grip portion, the outer diameter of the small diameter portion, the length of the small diameter portion, and the length of the grip portion shown in Table 1. The shaft and the connecting member were made of carbon fiber reinforced plastic. As in this embodiment, it is preferable to use the same material as the material constituting the shaft and the material constituting the connecting member. The outer diameter of the shaft was 1.5 cm.
The durability of the obtained golf club was measured as follows. In addition, the following tests were conducted on how the index finger and thumb of the right hand are applied and how the other parts are used. The results are shown in (Table 1).
-Durability The 20 subjects were asked to swing 50 times and to test golf balls 20 times in the same manner as a normal golf swing, and evaluated according to the following criteria.
Criteria: It does not break and does not bend more than necessary to catch the ball.
As a result of the trial hit, the case where 18 or more people answered that it was better than the normal golf club in light of the above criteria was evaluated as ◯, and the other cases were evaluated as x.
・ How to apply force For 20 subjects, we asked them to swing 50 times and test golf balls 20 times in the same way as a normal golf swing, and evaluated them according to the following criteria.
Criteria: The index finger and thumb of the right hand were not strong, but the little finger, ring finger and middle finger of the left and right hands were strong enough to grip well.
◯: More than 15 people answered that they meet the criteria.
Δ: 10 to 14 people answered that they met the criteria.
X: Less than 10 responded that they met the criteria.
-Usage feeling We asked 20 subjects to make 50 swings and 20 trial hits of golf balls in the same way as a normal golf swing, and evaluated them according to the following criteria.
Criteria: The index finger and thumb of the right hand were not stressed, but they could be used without discomfort.
◯: More than 15 people answered that they meet the criteria.
Δ: 10 to 14 people answered that they met the criteria.
X: Less than 10 responded that they met the criteria.

[Example 4]
A golf club was obtained in the same manner as in Example 1 except that steel was used as a material for forming the shaft and the connecting member.
As a result of verifying the durability, how to apply force, and the feeling of use of the obtained golf clubs in the same manner as in Example 1, all were ◯.

Claims (2)

In a golf club having a shaft and a grip portion connected to the shaft,
At least the grip portion and a rod-shaped small diameter portion having a diameter smaller than the outer diameter of the shaft are provided at the end portion of the grip portion on the shaft side, and the outer diameter of the small diameter portion is the outer diameter of the small diameter portion. All have the same diameter, 0.5 to 1 cm,
The outer diameter difference between the outer diameter of the grip portion and the outer diameter of the small diameter portion is 1 to 1.5 cm.
The length of the grip portion is 20 cm.
The small-diameter portion, the golf club according to claim Rukoto which have a length of 10~15cm between from the end of the shaft to the grip portion. The small diameter portion is formed by a connecting member that connects the shaft and the grip portion.
The connecting member has a shaft connecting portion fixed to the end of the shaft, a grip forming portion that forms a grip portion by attaching the grip member, and a rod-shaped portion that is located between the two and has a smaller outer diameter than the two. The golf club according to claim 1, wherein the golf club has a portion, and the small diameter portion is formed by the rod-shaped portion.