JPH0249673A - Golf club - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for joining the distal end of a tubular handle of a golf club to a neck integral with the head of the club.

Golf clubs include handles that are constructed of metal pipes that have a variety of different shapes and generally have a cylindrical or somewhat frustoconical lower end. The lower end forming the distal end of the handle is the so-called "head" of the golf club.
'', and for this purpose the head extends upwardly through a ``neck'' which is usually integral with the distal end of the handle by various means.

Among the various methods currently in use for performing such joining, U.S. Pat. No. 1,889,743
In the joining method described in No. 1 and No. 1,916,963,
A method is used in which the end of the handle is fitted inside the tubular neck of the head. For this purpose, an insert member having a particularly spherical shape is inserted into the interior of the handle from the upper end where the handle is located.

and the handle has a truncated conical shape, in which the end is fitted in advance into a neck having an axial receiving groove of a shape corresponding to the shape of the end of the handle, and then the insertion member is pushed inside the handle toward the lower end. Therefore, by forcibly fitting a ball-like insertion member into the end of the handle, a bulge is created in the side wall of the end of the handle toward the outside, and the side surface of the receiving groove of the head is produces a protrusion or rim that fits into a corresponding cavity formed in the In this way, a secure connection between the handle and the head of the golf club can be obtained through a snap-in connection. However, such joining methods have been shown to be effective in terms of the stiffness and durability of the resulting joints over time.
Nevertheless, a relatively complex tool is required to forcefully insert a relatively large diameter insertion member from the upper open end of the handle into the opposite end of the handle, i.e. into the small diameter portion of the handle. , which has the disadvantage of being difficult to implement.

The present invention aims to obviate the above-mentioned drawbacks by providing a method which is easy to implement and which allows a completely rigid connection between the head and handle of a golf club in a simple and quick manner.

For this purpose, the end of a tubular handle of a golf club, i.e. a handle made of a deformable material, in particular metal, generally exhibiting a cylindrical or slightly frustoconical shape, is joined to a neck integral with the head of the club. The method uses a handle whose lower end has an inner diameter slightly smaller than the outer diameter of the neck of the head; before starting the joining operation, a tightening ring with an inner diameter equal to or slightly larger than the outer diameter of the distal end of the handle is used. around the distal end of the handle so that it can slide freely over the handle; the distal end of the handle is then forced into the neck of the club head to radially expand the distal end of the handle; the outer diameter of the tightening ring is larger than the inner diameter of the tightening ring; and finally, the tightening ring is forced to slide toward the head of the club over the area of increased diameter at the distal end of the handle. The handle is characterized in that the constituent material of the handle is compressed between the inner neck, which is integral with the head, and the inner surface of the outer tightening ring.

Another object of the present invention is a joining device obtained by carrying out the above method, and a golf club equipped with the joining device.

One embodiment of the present invention will be described below with reference to the accompanying drawings, but the present invention is not limited to this embodiment.

The method according to the invention comprises a tubular handle 1 of a golf club whose lower end is only partially illustrated.

This is for joining with the head 2 forming a part of the club. The head 2 is provided with a cylindrical neck 3 projecting from the top of the head and serving to join the end of the handle 1 to the head 2.

The outer diameter a of the neck 3 is slightly larger than the inner diameter a of the lower end 1a of the tubular handle 1, which is cylindrical or slightly truncated.
For example, while the diameter a is 6.7 mm,
The diameter is 6.5 mm. What is the joining method?

Further, prior to the joining operation, a tightening ring 4 fitted into the end of the handle 1 is used. For this purpose, the tightening ring 4 has, in at least one part of its longitudinal direction, an inner diameter C equal to or only slightly larger than the outer diameter of the handle 1; the diameter C in the example shown is 8.5 mm. be.

To join the end of the handle 1 to the head 2, fit the tightening ring 4 into the handle from the end 1a of the handle 1 in advance, and insert the tightening ring from the length of the outer neck 3 of the head 2. Slide it toward the upper end of the handle 1 by a long distance. The end of the handle 1 is then tightly fitted into the neck 3 by relative axial movement. Since the inner diameter of the distal end 1a of the handle 1 is smaller than the outer diameter a of the neck 3, as a result of this movement, the distal end of the handle 1 expands in the radial direction, and its outer diameter d is larger than the outer diameter C in the rest state. reach the value. The outer diameter d in the outwardly expanded state is approximately 8.7 millimeters in the example considered. Forcibly slide it in the direction of the head 2. Since the inner diameter (e.g. 8.5 mm) of the tightening ring 4 is smaller than the outer diameter d of the expansion zone at the distal end of the handle 1, the axial sliding of the tightening ring 4 is limited to the inner diameter of the chain ring 4. Compression of the material constituting the handle 1 occurs with the outer surface of the neck 3. This elastic deformation of the material of construction in turn produces an increased holding force which prevents the neck 3 from unintentionally disengaging outside the handle 1.

To attach the head 2 to the handle 1 in a predetermined angular position, it is fitted into a corresponding approximately longitudinal slit formed in the distal end of the handle 1 and open at the distal end 1a of the handle 1. It is desirable to provide a mating indicator projection 3a, the thickness of which is at most equal to the thickness of the tubular handle 1 so as not to impede the sliding movement of the tightening ring 4.

In order to improve the adhesion between the end of the handle 1 and the neck 3, cooperating protrusions, such as vertical and/or horizontal thin stripes, are provided on one or both of the handle or the neck. Good.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the end and head of the golf club handle before joining. FIG. 2 is a longitudinal sectional view showing the end and head of the handle of the golf club after joining. FIG. 3 is a longitudinal sectional view showing the end of the handle and the neck of the head before joining. [Explanation of symbols of main parts] 1・・・・・・・・・・・・・・・・・・・・・・・・
...Tubular handle 1a ...Lower end 2 ・Head 3 ・Neck

Claims (1)

[Claims] 1. Use a handle (1) in which the inner diameter b of the lower end (1a) is slightly smaller than the outer diameter a of the neck (3) of the head (2); a tightening ring (4) having an inner diameter c equal to or slightly larger than the outer diameter of the distal end of the handle (4) is fitted around the distal end of the handle so that it can slide freely over the handle; Connect the end of the head (2) to the neck (
3) to expand the end of the handle in the radial direction so that the outer diameter of the handle takes a value d larger than the inner diameter c of the tightening ring (4); Forcibly sliding the tightening ring (4) in the direction of the head (2) over the area of increased diameter at the distal end of the handle (1), the inner neck (3) integral with the head and the inner surface of the outer tightening ring (4), the handle (1)
characterized by crushing the constituent materials of the
A method of joining the tubular handle of a golf club, i.e. the distal end of a handle generally cylindrical or slightly frustoconical and made of a deformable material, especially metal, to a neck integral with the head of the club. 2. On the neck (3) there is an indicator for an indicator that is fitted into a corresponding longitudinal slit (1b) formed at the end of the handle (1) and open at the distal end (1a) of the handle. protrusion(
2. Method according to claim 1, characterized in that 3a) is provided. 3. In order to improve the adhesion between the end of the handle (1) and the neck (3), one or both of the two members is provided with a plurality of protrusions that cause the two members to cooperate. The method according to claim 1 or 2, characterized in that: 4. The method according to claim 3, wherein the plurality of protrusions are thin filaments arranged vertically, horizontally, or both. 5. A tightening ring (forcibly engaged with the end of the handle (1) itself fitted to the neck (3) of the head (2) of the golf club)
4) A device for joining a tubular handle of a golf club to a neck integral with the head thereof. 6. For an indicator, said neck (3) engaging in a substantially longitudinal slit (1b) arranged in the distal wall of said handle (1) and open at its lower end (1a). 6. Device according to claim 5, characterized in that it carries projections of. 7. with a head (2); made of deformable material, especially metal; and with a lower end (1);
a) a tubular handle (1) whose inner diameter b is slightly smaller than the outer diameter a of the neck (3) of said head (2); around the distal end of said handle so as to be able to slide freely over said handle; a tightening ring (4) that is fitted and has an inner diameter c that is the same as or slightly larger than the outer diameter of the distal end of the handle; 3) so that the outer diameter of the handle is forcibly inserted into the tightening ring (4).
radially expanding the distal end of the handle to take a value d greater than the internal diameter c of the handle (1), after which the tightening ring (4) is inserted into the neck (3) in the region of increased diameter of the distal end of the handle (1). )
forcibly sliding in the direction of the handle (1) so as to crush the constituent material of the handle (1) between the inner neck (3) that is integral with the neck and the inner surface of the outer tightening ring (4), A golf club in which the end of the handle and the head are joined via a neck that is integral with the head.