JPH0551373U - Golf club - Google Patents

Abstract

(57) [Abstract] [Purpose] In particular, the club shaft of a golf club with a small face progression is strengthened, and the neck portion of the club head is reinforced, and the neck portion of the golf club is broken by the impact force at the time of hitting. It is an object of the present invention to provide a golf club in which the above is effectively prevented. [Constitution] Especially, the face progression is 15mm
Strengthening the club shaft 6 of the following golf clubs,
In addition, in order to reinforce the neck portion 2 of the club head, the club shaft 6 is hollowed in the hollow portion 6a from the sole portion 8 to the head upper surface H.
A rod-shaped shaft-reinforcing core material 13 (pultrusion rod) formed by embedding long fibers along the longitudinal direction by a drawing method is inserted and fixed between and the hosel end portion 3a.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a golf club, and more particularly to a golf club in which the club shaft is reinforced and the neck portion of the club head is reinforced.

[0002]

[Prior Art]

 Conventionally, in the iron golf club 1a and the iron golf club type wood golf club 1b, for example, as shown in FIGS. 3 and 4, the neck portion 2 of the club head has a small diameter, and The face progression F (face progression is the distance between the center line X-X of the hosel 3 and the leading edge 4 of the club head 1 in FIG. 3) is small (15 mm or less), so the heel of the club head is reduced. The thickness of the side face portion 5 is formed thin. As shown in FIG. 5, the club shaft 6 is inserted through the through hole 7 formed in the hosel 3 and the thin heel side face portion 5 up to the sole portion 8 so that the club shaft 6 is attached to the sole portion 8 side. Is fitted with a resin tail plug 9. Moreover, 10 has shown the socket.

[0003]

[Problems to be solved by the device]

 However, in the case of the golf club having the above structure, the club shaft 6 is held by the thin heel side face portion 5 and the hosel 3, and the neck portion 2 is formed to have a small diameter. There was a problem that the neck part of the was easily broken by the impact force at the time of hitting the ball.

The present invention has been made in view of such conventional problems. In particular, the club shaft of a golf club having a small face progression is reinforced and the neck portion of the club head is reinforced. However, it is an object of the present invention to provide a golf club in which the neck portion of the golf club is effectively prevented from being broken by the impact force at the time of hitting a ball.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention has a club head having a face progression of 15 mm or less. A hollow club shaft is inserted into the neck portion of the club head up to the sole portion, and The main point is to insert a core material for shaft reinforcement from the sole part of the head between the upper surface of the head and the end of the hosel.

[0006]

[Function of the device]

 This invention is constructed as described above, and as a means for reinforcing the club shaft at the neck portion of the club head, long fibers are longitudinally drawn from the sole portion in the hollow portion of the club shaft between the head upper surface and the hosel end portion by a drawing method. By inserting and fixing a rod-shaped shaft reinforcing core material (pultrusion rod) that is embedded and molded along with, the club shaft can be strengthened and the neck portion of the golf club can be reinforced. As a result, it is possible to effectively prevent the neck portion of the club shaft from being broken due to the impact force at the time of hitting the ball.

[0007]

[Example of device]

 An embodiment of the present invention will be described below with reference to the accompanying drawings. The same components as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted. FIG. 1 is a cross-sectional view of a wood golf club head 1b mainly made of fiber reinforced plastic according to a first embodiment of the present invention. In this embodiment, the club head has a face progression of 12 mm.

In the figure, 2 is a neck portion of the club head, 3 is a thin hosel, and this hosel 3 has a through hole 7 of a hollow club shaft 6 made of fiber reinforced plastic that penetrates to a sole portion 8. Has been formed. Further, the socket 10 is attached to the end portion 3 a of the hosel 3 via an adhesive agent 11, and the end portion 3 a of the hosel 3 is formed with a countersunk groove 12 for interposing the adhesive agent 11.

In the embodiment of the present invention, in order to strengthen the club shaft 6 and reinforce the hosel portion 3 of the club head, the club shaft 6 is hollowed in the hollow portion 6a from the sole portion 8 to the head upper surface H and the hosel end portion. A rod-shaped shaft-reinforcing core material 13 (pultrusion rod), which is formed by embedding long fibers along the longitudinal direction by a drawing method, is inserted and fixed between the shaft 3a and 3a. The gap h between the hosel end portion 3a and the upper end surface of the shaft reinforcing core material 13 is preferably 3 mm or more in order to avoid stress concentration, and also the club shaft 6 and the shaft reinforcing core material. The adhesion between 13 and the through hole 7 is to firmly fix it with an adhesive.

Further, in order to increase the adhesive strength between the hollow club shaft 6 and the shaft reinforcing core material 13, the inner surface of the club shaft 6 and the shaft reinforcing core material 13 are roughened in advance. The adhesive is applied and then fitted and adhered. Further, as a method of inserting and fixing the shaft reinforcing core material 13 in a predetermined position of the club shaft 6, the club shaft 6 may be inserted before being incorporated into the golf club head 1b, or after the club shaft 6 is assembled. Alternatively, it may be inserted from the sole portion 8 side.

With the above-described structure, the club shaft 6 can be strengthened and the hosel portion 3 of the club head 1b can be reinforced, so that the hosel portion 3 of the golf club can be struck at impact. It is possible to effectively prevent breakage due to force. FIG. 2 shows a second embodiment of the present invention. In this embodiment, the shaft reinforcing core material 13 is made slightly shorter, and the gap h between the hosel end portion 3a and the upper end surface of the shaft reinforcing core material 13 is shown. Is increased to the maximum allowable range, and is positioned above the sole plate 8. Since the other construction is similar to that of the first embodiment, the same reference numerals are given and the description thereof is omitted.

Further, although the wood golf club mainly made of fiber reinforced plastic has been described in the above embodiment, the present invention can also be applied to other club heads such as a metal wood golf club and the like. Of course, it can be applied to golf clubs.

[0013]

[Effect of the device]

 In this invention, the hollow club shaft is inserted through the neck portion of the club head to the sole portion as described above, and the club portion is pulled out between the sole portion in the hollow portion of the club shaft, the head upper surface and the hosel end portion. Since a shaft reinforcing core material molded by the method is inserted, the club shaft of a golf club with a small face progression is strengthened, and the neck portion of the club head is reinforced, so that the hosel portion of the golf club is hit. There is an effect that it is possible to effectively prevent breakage due to the impact force of.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a wood golf club head mainly made of fiber reinforced plastic showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a wood golf club head showing another embodiment of the present invention.

FIG. 3 is a side view of a conventional iron golf club head.

FIG. 4 is a front view of a conventional wood golf club head.

FIG. 5 is a cross-sectional view of a portion where a club shaft is inserted into a conventional wood golf club.

[Explanation of symbols]

1b Wood Golf Club 2 Neck Part 3 Hosel 4 Leading Edge 5 Toe Side Face Part 6 Club Shaft 7 Through Hole 8 Sole Part 9 Bottom Plug 10 Socket Part 3a Hosel End Part 11 Adhesive 13 Shaft Reinforcing Core H Head Top

Claims (1)

[Scope of utility model registration request] 1. In a golf club having a club head face progression of 15 mm or less, a hollow club shaft is inserted through a neck portion of the club head to a sole portion, and the head portion is inserted from the sole portion in the hollow portion of the club shaft. A golf club, wherein a shaft reinforcing core material is inserted between the upper surface and the end of the hosel.