JPH0756044Y2 - Golf club - Google Patents

Description

[Detailed description of the device]

[0001]

This invention relates to a golf club,
More specifically, it relates to improvement of a golf club having a metal head.

[0002]

2. Description of the Related Art Conventionally, a golf club having a metal head 1 as shown in FIG. 4 has been known. That is, this golf club belongs to the category of so-called "metal wood", in which a metal hosel 3 is also integrally formed with a metal head main body 2, and a shaft 4 is inserted into and bonded to the hosel 3. Is.

[0003]

However, the above-mentioned prior art has the following problems. That is, the head body 2
Since the hosel 3 is integrally formed with the hosel 3 and all of them are made of metal such as stainless steel, the impact of the impact is difficult to be absorbed, and the impact is largely transmitted to the player through the shaft 4, so that the wrist and elbow of the player are not absorbed. Or it puts a heavy burden on the shoulders. Also hosel 3
Since the weight of the head is large, the center of gravity of the head 1 is likely to be biased toward the heel, and thus the degree of freedom in designing weight distribution is narrow.

To solve the above problems, Japanese Patent Application No. 57-1
It is conceivable that the hosel is separate from the head body and that the hosel is made of wood (wooden member) as described in the microfilm of No. 61533 (Shokai Sho 59-68567). That is, wood represented by Persimmon has a characteristic that it has a large shock absorbing power as compared with a metal that has been conventionally used as a material for a head.
Therefore, by making the hosel made of wood, it is possible to absorb the impact of impact at a greater rate than before. Further, wood such as persimmon has a characteristic that its specific gravity is smaller than that of a metal which has been conventionally used as a material for a head. Therefore, by making the hosel made of wood, the weight can be made lighter than before. The weight of the head is generally specified as a whole, so that the weight of the head can be increased and the size of the head can be increased and the size of the head can be increased. It can be widened or the head speed during swinging can be increased to extend the flight distance of the ball.

However, in the golf club described in the above microfilm, the hosel is inserted into the head body downward from the lower end side. Therefore, according to this conventional technique, if there is an insufficient connection between the hosel and the head main body, the head main body may be detached from the hosel due to centrifugal force during the swing, and the head main body may pop out.

[0006]

SUMMARY OF THE INVENTION In view of the above points, the present invention has been devised to solve the problems found in the above-mentioned prior art, and in order to achieve this object, a metal head body The hosel insertion portion having a lower end opening having a diameter larger than that of the upper end opening while penetrating the head body is provided with a wood hosel having a lower end side diameter larger than the upper end side diameter. It was decided to insert from the opening side of the lower end.

[0007]

The metal head body is provided with a hosel insertion portion which penetrates the head body and has a lower end opening whose diameter is larger than that of the upper end opening. The hosel insertion portion has a lower end side diameter of the upper end side. If a hosel made of wood larger than the diameter is inserted from the lower end opening side,
Without considering the connection state of the hosel and the head body,
Since the upper side is small and the lower side is large in shape, it is possible to prevent the head body from coming off from the hosel.
Also, since the hosel insertion part penetrates the head body and the hosel is inserted from the lower end opening side, the hosel is inserted into the hosel insertion part from the small diameter upper end side, which may hinder the insertion work. Absent.

[0008]

Embodiments of the present invention will now be described with reference to the drawings.

As shown in FIGS. 1 to 3, a metal head body 2 is provided with a hosel insertion portion 5, and a hosel 3 made of Persimmon is inserted into the hosel insertion portion 5.
The shaft 4 is inserted into the hosel 3. The hosel insertion portion 5, the hosel 3 and the shaft 4 are arranged substantially coaxially and a predetermined lie angle is set.

The hosel insertion portion 5 is formed as a substantially cylindrical hole penetrating the head body 2 in an obliquely vertical direction, has an inner peripheral wall 5c, and has a diameter (inner diameter) of its lower end opening 5a. It is formed in a tapered shape with a diameter larger than the diameter (inner diameter) of 5b. In accordance with this, the hosel 3 is also formed in a taper shape such that the diameter (outer diameter) of the lower end 3a thereof is larger than the diameter (outer diameter) of the upper end 3b thereof. 3 is inserted into the hosel insertion part 5 from the lower side of the head body 2.
This can prevent the head body 2 from slipping out of the hosel 3 during a swing. Further, since the hosel insertion portion 5 penetrates the head body 2 and the hosel 3 is inserted from the lower end opening 5a side, the hosel 3 is inserted into the hosel insertion portion 5 from the small diameter upper end 3b side. It does not interfere with the operation.
The head body 2 and the hosel 3 and the hosel 3 and the shaft 4 are fixed by an adhesive, respectively. After the insertion, the lower end of the hosel 3 is ground so as to be flush with the lower surface of the head body 2. The hosel 3 is a tubular body having a bottom, so that the shaft 4 is not exposed on the lower surface of the head body 2 and only the hosel 3 is exposed. Reference numeral 6 in the figure is a reinforcing thread that winds and reinforces the joint portion between the shaft 4 and the hosel 3.

In the golf club having the above structure, the hosel 3 is formed separately from the head main body 2 and is molded by persimmon. Therefore, the large impact absorbing power of this persimmon is utilized to give a larger impact impact than the prior art. Absorb. Therefore, the magnitude of the impact transmitted to the player via the shaft 4 can be made smaller than before, and the burden on the player can be made smaller than before. Further, as the weight of the hosel 3 is reduced, the weight of the head main body 2 is increased and the size of the head main body 2 is increased. Therefore, it is possible to widen the sweet spot and to increase the flight distance of the ball by increasing the head speed during swing.

Further, a metal head main body 2 is provided with a hosel insertion portion 5 which penetrates the head main body 2 and has a lower end opening 5a larger in diameter than the upper end opening 5b. The hosel insertion portion 5 has a lower end. Since the hosel 3 made of wood whose diameter on the 3a side is larger than that on the upper end 3b side is inserted from the lower end opening 5a side, the shape of the hosel 3 can be improved without considering the connection state of the hosel 3 and the head body 2. Since the upper side is small and the lower side is large, the head body 2 can be prevented from coming off from the hosel 3. Therefore, it is possible to provide a highly safe golf club. Also, the hosel insertion part 5 is the head body 2
Since the hosel 3 is inserted from the side of the lower end opening 5a and the hosel 3 is inserted from the side of the upper end 3b having a small diameter into the hosel insertion portion 5, there is no hindrance to the insertion work. Therefore, this makes it possible to provide a golf club which is easy to insert the hosel 3 and can be easily manufactured.

Wood such as persimmon has beautiful grain and color, and its surface has a unique luster after finishing. The golf club takes advantage of this advantage and exposes the wood to the head 1 to exert an excellent design effect.

[0014]

[Effect of the Invention] The present invention has the following effects.

That is, the head main body made of metal is provided with a hosel insertion portion which penetrates the head main body and has a lower end opening having a larger diameter than the upper end opening. The hosel made of wood that is larger than the diameter of the side is inserted from the lower end opening side, so even if you do not consider the connection state of the hosel and the head main body, the upper side is small in shape and the lower side is large. It is possible to prevent the head body from coming off. Therefore, it is possible to provide a highly safe golf club. Also, since the hosel insertion part penetrates the head body and the hosel is inserted from the lower end opening side, the hosel is inserted into the hosel insertion part from the small diameter upper end side, which may hinder the insertion work. Absent. Therefore, this makes it possible to provide a golf club that is easy to work with respect to inserting the hosel and can be easily manufactured.

[Brief description of drawings]

FIG. 1 is a perspective view of an essential part of a golf club according to an embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of the golf club.

FIG. 3 is a bottom view of the main part of the golf club.

FIG. 4 is a perspective view of a main portion of a conventional golf club.

[Explanation of symbols]

 1 head 2 head body 3 hosel 3a lower end 3b upper end 4 shaft 5 hosel insertion part 5a lower end opening 5b upper end opening 5c inner peripheral wall 6 reinforcing thread

Claims (1)

[Scope of utility model registration request] 1. A head body made of metal , wherein the head body is provided.
The bottom opening and the top opening
The hosel insertion part that is made larger
The diameter of the lower end side was made larger than the diameter of the upper end side in the embedded part.
A wood hosel was inserted from the lower end opening side.
A golf club characterized by .