JP3076161B2 - Golf club neck socket - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf club neck socket which is fitted to a shaft and abuts against an upper end face of a neck portion of a club head.

[0002]

2. Description of the Related Art It has been well known that a neck socket is fitted and fixed to a shaft mainly for the purpose of enhancing the decorativeness of a golf club. FIG. 6 shows an example of a conventional neck socket 1a, and FIG. 7 is a cross-sectional view showing a state where the socket 1a is fitted and fixed to a shaft 3a of a golf club 2a.

[0003] As can be seen from these figures, the neck socket 1a has a through hole 5a at the tip end for fitting into a shaft 3a to which a club head 4a is fixed. With the neck socket 1a fitted to the shaft 3a as shown in FIG. 7, the socket 1a comes into contact with the upper end face 6a of the neck portion of the club head 4a. By providing the neck socket 1a in this manner, the neck portion upper end surface 6a of the club head 2a can be prevented from being exposed to the outside, and the appearance of the entire golf club can be improved.

Incidentally, the neck socket 1a is made of various materials such as a synthetic resin.
a is fixed to the shaft 3a by an adhesive. If the neck socket 1a is made of a material that contracts with time, such as celluloid, for example, the neck socket 1a is not used while the golf club 2a is used for a long time.
a contracts in the longitudinal direction indicated by the arrow Xa in FIG. 7, thereby creating a gap 8a between the lower end portion 7a of the neck socket 1a and the upper end surface 6a of the neck portion of the club head. Decrease. Celluloid has a suitable elasticity and high impact strength, and is therefore suitable as a material for a neck socket. However, when such a material is used, the above-described gap problem occurs.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club which can prevent a gap from being formed between the upper end surface of the neck portion of the club head and the lower end portion of the socket even when the golf club is used for a long period of time. To provide a club neck socket.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a club head having a through hole fitted to a shaft and fixed to a tip end of the shaft in a state fitted to the shaft. In the neck socket of the golf club abutting on the upper end surface of the neck portion, the end of the neck socket on the side abutting on the upper end surface of the neck portion is the lower end, and the opposite end is the upper end, and the entire through hole of the neck socket is formed. When the part from the upper end to the lower end is a through hole upper region, and the through hole on the lower end side than the region is a through hole lower region, the neck socket is fitted to the shaft. In the previous state, the inner diameter of the through-hole upper region is set to be equal to or larger than the outer diameter of the shaft portion to which the through-hole is fitted. Hole At least a portion of the inner diameter of the part region, which proposes a neck socket set smaller than the outer diameter of the shaft portion to be fitted.

[0007]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is an overall perspective view of a golf club 2 having a neck socket 1 according to one embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the neck socket. FIG.
Is a sectional view of the neck socket alone.

[0009] The neck socket 1 shown here also has a through hole 5 that fits into the shaft 3 like the conventional socket. When the socket 1 is fitted to the shaft 3, the socket 1 comes into contact with the upper end face 6 of the neck of the club head 4 fixed to the tip of the shaft 3. The neck socket 1 and the club head 4 are both attached to the shaft 3 by an adhesive.
To be fixed. In this example, it is assumed that the neck socket 1 is made of celluloid.

Here, the end of the neck socket that is in contact with the upper end surface 6 of the neck portion is referred to as a lower end portion 7, and the opposite end portion is referred to as an upper end portion 9. Also, the through hole 5 of the neck socket 1
Of the whole, a part from the upper end 9 to the lower end 7 is defined as a through-hole upper region 10, and the lower end 7 is smaller than the region 10.
The through hole portion on the side is referred to as a through hole lower region 11.

[0011] Figure 3 shows a state before fitting of such neck socket 1 to the shaft 3, in this state, the inner diameter d ₁ of the through hole upper region 10 described above, which is fitted Is it equal to the outer diameter d ₂ of the shaft part (FIG. 2) (d ₁
= D ₂ ) or larger (d ₁ >
d _2). In this example, the inner diameter d ₁ is equal to the outer diameter d _{2 of the} shaft 3.
Is set slightly larger, preferably about 0.1 to 0.2 mm.

Similarly, before the neck socket 1 is fitted to the shaft 3, at least a portion of the through hole lower region 11, in this example, the inner diameter D _{1 of} only the small diameter portion indicated by reference numeral 12.
There is also set, for example, 0.4 to about 0.5mm less than the outer diameter D ₂ of the shaft portion of this fitting.

Further, in this embodiment, the diameter of the through hole from the small diameter portion 12 to the lower end 7 is tapered toward the lower end 7. Hereinafter, this through hole portion is referred to as a tapered portion 13.

When the neck socket 1 as described above is fitted to the shaft 3 as shown in FIG. 2 and both are fixed by an adhesive, the circumferential surface of the through hole upper region 10 becomes the shaft 3
Are fitted with a small gap G with respect to the outer peripheral surface of.
The gap G is not filled with an adhesive.

On the other hand, the small-diameter portion 12 of the through-hole lower region 11 fitted to the shaft 3 receives a reaction force from the outer peripheral surface of the shaft 3 and elastically expands its diameter by the pressure, and is strong against the outer peripheral surface of the shaft. Press with force. A large amount of adhesive 14 is filled in the space inside the tapered portion 13 of the through hole 5, and the tapered portion 13 is also firmly fixed to the shaft 3.

The golf club 2 is completed by fitting and fixing the neck socket 1 to the shaft 3 as described above, and by inserting the tip of the shaft 3 into the insertion hole 15 of the club head 4 and fixing it. However, at this time, since the neck socket 1 fitted to the shaft 3 is made of celluloid, the neck socket 1 contracts gradually in the longitudinal direction X while the golf club 2 is used for a long period of time.

Conventionally, there has been a problem that a gap is formed between the lower end portion of the neck socket and the upper end surface of the neck portion due to the contraction.

On the other hand, in the golf club 2 shown in FIGS. 1 and 2, the upper region 10 of the through hole of the neck socket 1 has a slight gap G with respect to the shaft 3 as described above. Because it is located, this area 1
The socket portion corresponding to 0 can freely contract. On the other hand, since the through-hole lower region 11 is firmly fixed to the shaft 3 as described above at both the small-diameter portion 12 and the tapered portion 13, even if the neck socket 1 contracts, The lower portion 11 of the through hole does not move in the longitudinal direction X with respect to the shaft 3. That is, since the socket portion of the through-hole upper region 10 contracts more freely in the longitudinal direction X, the socket portion of the through-hole lower region 11 firmly fixed to the shaft 3 does not contract much. . Therefore, even if the golf club 2 is used for a long period of time, there is no large gap between the lower end portion 7 of the neck socket 1 and the upper end surface 6 of the neck portion as in the related art. You can keep it beautiful.

The above-described operation and effect can be similarly obtained when the inner diameter d ₁ of the through hole upper region 10 before fitting to the shaft 3 is equal to the outer diameter d ₂ of the shaft portion to which it is fitted. .

When the golf club 2 shown in FIGS. 1 and 2 is swung and a ball (not shown) is hit by the club head 4, a large impact force is applied to the club head 4 from the ball, and the shaft 3 Are elastically deformed by bending. At this time, the neck socket 1 also elastically deforms together with the shaft 3, but when the neck socket 1 repeats such deformation many times, it moves slightly upward with respect to the shaft 3, thereby also causing the lower end of the neck socket 1 to move. There is a possibility that an unsightly gap may be formed between the portion 7 and the upper end surface 6 of the neck portion. In particular, as shown in FIG. 2, if the through-hole upper region 10 of the neck socket 1 is not fixed to the shaft 3, the possibility of the neck socket 1 shifting due to insufficient fixing force increases.

However, the neck socket 1 shown in FIG.
As described above, the small-diameter portion 12 is pressed against the shaft 3 with a large force, and the tapered portion 13 is firmly bonded to the shaft 3 by a large amount of the adhesive 14 filled in the inner space. Therefore, even if the neck socket 1 is repeatedly bent and deformed, it does not move upward with respect to the shaft 1 in the longitudinal direction. In this way,
The problem that a gap is formed between the lower end portion 7 of the neck socket 1 and the upper end surface 6 of the neck portion 1 can be reliably prevented.

When manufacturing the golf club 2, the shaft 3
In order to assemble the neck socket 1 and the club head 4 and integrate them, as described briefly above, first, the shaft 3 is press-fitted into the through hole 5 of the neck socket 1 and the two are fitted. And fix them with an adhesive. Next, an adhesive is applied to the tip of the shaft 3, and the tip is inserted into the insertion hole 15 of the club head 4 to fix them together. When the shaft 3 is pressed into the neck socket 1, the shaft 3 is pressed. the shaft 3 to be added a large load exceeding 50kg so that it can not be fitted into the socket 1, the inner diameter D ₁ of the small diameter portion 12, if determined increasing the difference between the outer diameter D ₂ of the shaft 3, the shaft After the fitting 3 and the neck socket 1, the small diameter portion 12 is pressed against the shaft 3 with a sufficiently large force. Thereby, the neck socket 1
By repeatedly bending, it is possible to more reliably prevent a problem that the shaft 3 is displaced.

In the embodiment shown in FIG. 3, before the neck socket 1 is fitted to the shaft 3, only the inner diameter D ₁ of the small diameter portion 12 of the through hole lower region 11 is changed to the outer diameter D of the shaft 3. was set to be smaller than _2, in the embodiment shown in FIG. 4, it is smaller than the outer diameter D ₂ of almost the entire inner diameter D ₁ is the shaft 3 of the through-hole lower region 11 (FIG. 2). With this configuration also, the pressure contact force between the through-hole lower region 11 and the shaft 3 can be effectively increased, and the above-described effects can be obtained.

In the embodiment shown in FIG. 5, the upper region 10 of the through hole is tapered from the upper end 9 of the neck socket 1 toward the lower end 7 thereof. According to such a configuration, when fitting the shaft 3 and the neck socket 1, it is possible to prevent the problem that the edge 16 of the shaft 3 is smoothly fitted into the through hole 5 of the neck socket 1 and the neck socket 1 is damaged. .

In the structure shown in FIGS. 3 and 4, the boundary between the upper region 10 and the lower region 11 of the through hole is stepped, so that the shaft edge 16 (FIG. 5) may hit the step and damage the portion. However, in the embodiment shown in FIG. 5, since there is no step as described above, it is possible to prevent the problem that the neck socket 1 is damaged. You can do it. The other configuration of the neck socket 1 shown in FIG. 5 is the same as the embodiment shown in FIG.

The present invention is not limited to the iron type golf club as shown in FIG. 1, but can be widely applied to various golf club sockets such as wood or putter types.

[0027]

According to the first aspect of the present invention, even if the neck socket contracts with time, an unsightly gap is formed between the lower end of the socket and the upper end of the neck of the club head. Can be blocked.

[Brief description of the drawings]

FIG. 1 is a perspective view of a golf club having a neck socket according to an embodiment of the present invention.

FIG. 2 is an enlarged sectional view of a neck socket portion of the golf club shown in FIG.

FIG. 3 is a cross-sectional view of a neck socket before being fitted to a shaft.

FIG. 4 is a sectional view similar to FIG. 3, showing another embodiment of the neck socket.

FIG. 5 is a sectional view similar to FIG. 3, but showing still another embodiment of the neck socket.

FIG. 6 is a sectional view of a conventional neck socket.

7 is a cross-sectional view showing a state after the neck socket shown in FIG. 6 has been fitted to the shaft.

[Explanation of symbols]

1 neck socket 2 golf club 3 shaft 4 club head 5 through hole 6 neck upper face 7 lower portion 9 the upper end portion d ₁ inside diameter d ₂ outer diameter D ₁ inside diameter D ₂ the outer diameter

Claims (1)

(57) [Claims] 1. A golf club neck socket having a through-hole fitted to a shaft and abutting on an upper end surface of a neck portion of a club head fixed to a tip portion of the shaft when fitted to the shaft, The end of the neck socket, which is in contact with the upper end face of the neck, is the lower end, and the end opposite to the upper end is the upper end. One of the entire through holes of the neck socket extends from the upper end to the lower end. When the portion is a through hole upper region, a through hole portion on the lower end side of the region is a through hole lower region, and before the neck socket is fitted to the shaft, the inner diameter of the through hole upper region is It is set to be equal to or larger than the outer diameter of the shaft portion to be fitted, and in the state before the neck socket is fitted to the shaft, at least a part of the inner diameter of the through hole lower region is fitted. Neck socket, characterized in that set to be smaller than the outer diameter of Yafuto portion.