JP2005065929A - Golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club lowering its gravity center and reducing the weight. <P>SOLUTION: This golf club 10 is so formed that a club head 20 is provided with a head body 30 and a neck part 40 made of titanium, an insertion part 42 of the neck part 40 is inserted into a mount part 37 of the head body 30, a calking bar is press-fitted in and penetrated through the mount part 37 and the insertion part 42, and the both ends of the calking bar are calked to fix the head body 30 and the neck part 40. An embedding body 51 having a specific gravity larger than that of the head body 30 is embedded in a sole 32 of the club head 20 and the weight obtained by reducing the weight of the neck part 40 is redistributed in the sole 32 of the club head 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a golf club.

Generally, a golf club is composed of a club head and a club shaft, and is generally classified into three types: wood, iron, and putter. Conventionally, a club head of a golf club has a recess called a cavity formed on the back surface of the main body, and the recess is cut into an undercut shape so that the recess is deeply cut. The center-of-gravity position is adjusted by redistributing the part (for example, Patent Document 1).
JP-A-7-8583

  Incidentally, golf clubs are required to have a low center of gravity and a light weight. That is, by setting the center of gravity low, the center of gravity approaches the hitting point and the ball can be played strongly, and the ball can easily rise even for elderly people and women. Further, by reducing the weight, it is possible to improve the head speed and the controllability of the golf club, thereby extending the flight distance and avoiding unnecessary spin.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is to provide a golf club capable of reducing the center of gravity and reducing the weight.

  In order to solve the above-described problems, the present invention provides a golf club comprising a club head at the tip of a club shaft, the club head comprising a head body and a titanium neck, The head main body and the neck portion are fixed by inserting into the mounting portion of the head main body, penetrating a caulking rod into the mounting portion and the insertion portion by press fitting, and caulking both ends of the caulking rod. To do. According to this configuration, since the neck portion of the club head is made of titanium, the neck portion becomes light and the golf club has a low center of gravity. In addition, the insertion part of the neck part is inserted into the attachment part of the head body, a caulking bar is inserted into the attachment part and the insertion part by press fitting, and both ends of the caulking bar are caulked to connect the head body and the neck part. Since they are fixed, it is possible to reliably avoid the case where the neck portion and the head body are displaced.

  Further, in the above-described configuration, both ends of the caulking rod may be caulked and then polished so that the caulked portion does not stand out in appearance. Also, a hole is provided in the insertion part of the neck part to allow the air between the insertion part and the attachment part to escape when inserted into the attachment part of the head body. It may be easy to insert. Further, a metal material having a specific gravity larger than that of the head body may be embedded in the sole of the club head, and the weight reduced by the neck portion may be redistributed to the sole side.

  In the golf club of the present invention, since the club head includes the head main body and the titanium neck portion, the neck portion becomes light, the weight of the golf club can be reduced, and the center of gravity of the golf club can be lowered. be able to. Furthermore, the golf club of the present invention inserts the insertion portion of the neck portion into the attachment portion of the head body, penetrates the caulking rod into the attachment portion and the insertion portion by press fitting, and caulks both ends of the caulking rod, Since the head main body and the neck portion are fixed, it is possible to reliably avoid the case where the neck portion and the head main body are displaced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a view showing an iron-type golf club 10 according to an embodiment of the present invention. The golf club 10 includes a club shaft 11 formed of carbon fiber or the like, and a club head 20 provided at the tip of the club shaft 11.

  The club head 20 includes a head main body 30 and a neck portion 40 that corresponds to a neck portion of the club head 20, that is, functions as a hosel that connects the club shaft 11 and the club head 20. The head body 30 is manufactured by appropriately using a method such as forging or casting of a metal material such as stainless steel, the face 31 on the front surface, the sole 32 on the lower part, the toe 33 on the tip side of the head body 30, and the club shaft of the head body 30. A heel 34 and a hosel base 35 protruding substantially obliquely upward from the heel 34 are formed on the 11 side.

  FIG. 2 is a diagram showing the configuration of the club head 20. In the head body 30, a plurality of parallel narrow grooves 36 called score lines are formed in the face 31 by a conventional method, and a countersink hole is formed in the hosel base 35 downward from the upper surface thereof. Thus, an attachment portion 37 for attaching the neck portion 40 is formed. Further, the hosel base 35 is formed with a through-hole penetrating in a substantially vertical direction with respect to the axial direction of the hosel base 35 (the arrow X direction in the drawing) in the wall portion 38 around the mounting portion 37. A caulking bar hole 50 for press-fitting a caulking bar to be described later is formed.

  A buried body 51 made of a metal material having a specific gravity larger than that of the head body 30, for example, a tungsten alloy, is buried in the sole 32 of the head body 30. The embedded body 51 is embedded on the toe 33 side and the heel 34 side of the sole 32 of the head body 30.

  The neck portion 40 is made of a material having a specific gravity smaller than that of the head main body 30, for example, pure titanium or a titanium alloy, and has a substantially pipe-shaped shaft insertion portion 41 into which the club shaft 11 is inserted, and a mounting portion for the head main body 30. The insertion part 42 to be inserted into 37 is integrally formed.

  More specifically, the insertion portion 42 of the neck portion 40 is formed in a shape that fits into the attachment portion 37 of the head body 30 with almost no gap, and the insertion portion 42 is attached to the attachment portion 37 of the head body 30. When inserted, a through hole 43 is formed at a position communicating with the caulking bar hole 50 of the attachment portion 37. Further, the insertion portion 42 is formed with a through hole 44 penetrating from the surface on the attachment portion 37 side toward the shaft insertion portion 41 side. The through-hole 44 functions as an air hole through which the air between the insertion portion 42 and the attachment portion 37 is released when the insertion portion 42 of the neck portion 40 is inserted into the attachment portion 37 of the head body 30. . As a result, the insertion portion 42 of the neck portion 40 can be easily inserted all the way into the attachment portion 37 of the head body 30.

  The head main body 30 and the neck portion 40 are formed by inserting the insertion portion 42 of the neck portion 40 into the attachment portion 37 of the head main body 30, and the caulking bar hole 50 of the head main body 30 and the through hole 43 of the neck portion 40. And a metal caulking rod (not shown) is inserted through the communicating hole by press fitting, and then both ends of the caulking rod protruding from the head body 30 are caulked with a tool such as a hammer. Are firmly bonded. After that, the raised portion is smoothed by polishing, and the actual product is processed so as to be inconspicuous.

  As described above, in the golf club 10 according to the present embodiment, the neck portion 40 of the club head 20 is made of titanium having a specific gravity smaller than that of the head main body 30, so that the neck portion and the head main body are made of the same material. Compared to the integrally molded conventional golf club, the neck portion above the head body is lighter. As a result, it is possible to reduce the weight and weight of the golf club and to easily adjust the position of the center of gravity.

  In the present embodiment, the neck portion 40 is reduced in weight, while the embedded body 51 having a specific gravity larger than that of the head body 30 is embedded in the sole 32 of the club head 20, that is, the reduced weight is applied to the sole 32 side. By redistributing, the center of gravity can be further lowered. Furthermore, by embedding the embedded body 51 on the toe 33 side and the heel 34 side of the sole 32 of the head body 30, the toe-heel balance that affects the straightness of the hit ball can be improved.

  In the present embodiment, the neck portion 40 and the head main body 30 are passed through the neck portion 40 and the head main body 30 by press-fitting the caulking rod, and both ends of the caulking rod are caulked and fixed. The neck portion 40 and the head main body 30 can be coupled. In this case, the caulking rod may cause the neck portion 40 and the head main body 30 to be displaced in the direction in which the neck portion 40 and the head body 30 come out (arrow X direction in FIG. 2). The case where it raise | generates can be suppressed, and the case where position shift arises in the neck part 40 and the head main body 30 can be avoided reliably.

  The above-described embodiment is merely one aspect of the present invention, and can be arbitrarily modified within the scope of the present invention. For example, in the above-described embodiment, the case where the present invention is applied to the iron-shaped golf club 10 has been described. However, the present invention can also be applied to a wood or putter golf club. When a golf club set is manufactured by applying the present invention, for example, applied from a long iron to a short iron, for example, No. 1, No. 2, No. 3, No. 9, PW (pitching wedge) It is preferable to reduce the weight of each golf club so that the change in weight of each golf club of SW (sand wedge) has the same tendency as the change in weight of a conventional golf club set.

  In the above-described embodiment, the case where the neck portion 40 and the head main body 30 are fixed with a single caulking bar has been described. However, a plurality of caulking bars may be penetrated from different directions and fixed, Various shapes of the caulking rod can be applied.

It is a figure which shows the iron-shaped golf club which concerns on embodiment of this invention. It is a figure which shows the structure of the club head of a golf club.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Golf club, 11 ... Club shaft, 20 ... Club head, 30 ... Head main body, 37 ... Mounting part, 40 ... Neck part, 42 ... Insertion part, 43, 44 ... Through-hole, 50 ... Caulking rod hole.

Claims (4)

It has a club head at the tip of the club shaft,
This club head has a head body and a neck made of titanium,
The insertion part of the neck part is inserted into the attachment part of the head body, a caulking bar is inserted through the attachment part and the insertion part by press-fitting, and both ends of the caulking bar are caulked to form the head body and the neck. A golf club characterized by fixing a part.   The golf club according to claim 1, wherein both ends of the caulking rod are polished after being caulked.   The insertion portion of the neck portion is provided with a hole for allowing air between the insertion portion and the attachment portion to escape when inserted into the attachment portion of the head body. The golf club according to claim 1 or 2. 4. The golf club according to claim 1, wherein a metal material having a specific gravity greater than that of the head main body is embedded in a sole of the club head.

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