JP2010246595A - Golf club - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a golf club which permits a socket to easily be inserted between a hosel and a shaft and prevents the socket from rising up from the hosel even when a golf ball is hit. <P>SOLUTION: The socket 5 is formed of an elastic material, and annular convexities 9 and annular concavities 10 are provided on the periphery of the inserted portion 6 of the socket 5 so as to make the distance from the central axis CL of the socket 5 to the tops of the annular convexities 9 greater than the inside radius of the insertion hole 3 of the hosel 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a golf club, and more particularly, to a golf club in which a socket can be easily inserted between a hosel and a shaft and does not rise from the hosel when a golf ball is hit.

  2. Description of the Related Art Conventionally, in a golf club, the hosel is removed in order to eliminate the visual discomfort at the connection between the hosel of the golf club head (hereinafter simply referred to as “head”) and the golf club shaft (hereinafter simply referred to as “shaft”). A socket (sometimes referred to as a “neck cell” or “ferrule”) is placed immediately above.

  By the way, soft shafts are used in golf clubs for less powerful players such as women and the elderly, but since such shafts generally have low bending rigidity, they are connected to hosel where stress is concentrated when hitting. There is a possibility that the shaft may break at the portion. Therefore, a golf club has been manufactured in which the lower portion of the socket is inserted between the hosel and the shaft to absorb vibrations upon hitting to prevent the shaft from breaking.

  However, in the golf club as described above, there is a problem that the socket rises from the hosel due to vibrations generated when the golf ball is hit, and the inserted portion eventually comes out of the hosel.

  In order to solve such a problem, Patent Document 1 proposes a golf club in which the inner diameter of the through hole of the socket is adjusted so that the deformation of the shaft does not directly reach the socket.

  However, in the above golf club, since the socket and the shaft are in contact with each other, it is impossible to prevent the deformation of the shaft from reaching the socket completely, and it is impossible to sufficiently prevent the socket from rising. There was a problem. In addition, since the gap between the hosel and the shaft is usually very narrow (for example, about 1.2 to 1.3 mm), it is difficult to insert the socket between the hosel and the shaft. It was.

JP 2008-212454 A

  SUMMARY OF THE INVENTION An object of the present invention is to provide a golf club in which a socket can be easily inserted between a hosel and a shaft and does not rise from the hosel even when a golf ball is hit.

  The golf club of the present invention that achieves the above object is a golf club in which a part of a socket is interposed between a hosel of a golf club head and a golf club shaft, and the socket is formed of an elastic material. An annular convex portion and an annular concave portion are provided on the outer peripheral surface of the insertion portion, and the distance from the center axis of the socket to the top of the annular convex portion is larger than the inner radius of the insertion hole of the hosel. It is characterized by this.

When the annular convex portion is divided by a virtual cylindrical surface having the same central axis as the socket and having the same inner radius as the insertion hole of the hosel, the axial sectional area of the outer portion of the divided portion is zero. It is desirable that the thickness is 0.05 to 0.23 mm ² .

  The depth of the annular recess is preferably ¼ to ½ of the thickness of the insertion portion of the socket. Moreover, you may make it an annular convex part extend spirally on the outer peripheral surface of the insertion part of a socket.

  Furthermore, the socket is preferably formed from celluloid or cellulose (acetylcellulose).

  According to the golf club of the present invention, in the golf club in which a part of the socket is interposed between the hosel of the golf club head and the golf club shaft, the socket is formed of an elastic material, and the outer peripheral surface of the insertion portion of the socket The annular protrusion and the annular recess are provided on the socket, and the distance from the center axis of the socket to the top of the annular protrusion is made larger than the inner radius of the insertion hole of the hosel. Since the annular convex portion is elastically deformed and crushed when inserted into the gap, the socket can be easily inserted between the hosel and the shaft. Further, after the socket is mounted, the adhesive in the annular recess is hardened in a state of being firmly joined to the inner surface of the insertion hole, and engages with the annular recess to prevent the socket from being removed. There will be no lift from the hosel when hitting.

1 is a partially assembled view of a golf club according to an embodiment of the present invention. It is an example of a socket, Comprising: (a) shows a side view, (b) shows sectional drawing shown by XX arrow in (a), respectively. It is a side view which shows another example of a socket. It is a partial sectional view showing the assembly process of the golf club which consists of an embodiment of the present invention, and (a) shows the state where a shaft was fixed, and (b) shows the state where a socket was equipped, respectively. FIG. 3 is an enlarged cross-sectional view of a Y portion shown in FIG. It is a side view which shows another example of a socket.

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

  FIG. 1 shows a golf club according to an embodiment of the present invention.

  In this golf club, a shaft 4 is inserted and fixed in an insertion hole 3 of a hosel 2 formed in a head 1, and a part of a socket 5 is inserted between the hosel 2 and the shaft 4. . The insertion hole 3 of the hosel 2 has a stepped shape with a wide diameter on the opening side, the tip end of the shaft 4 on the tip side is fixed to the narrow diameter part of the insertion hole 3, and the socket 5 has a wide diameter part. Inserted into.

  As shown in FIG. 2, the socket 5 is formed on a base portion 6 interposed between the hosel 2 and the shaft 4 and an upper portion of the base portion 6, and eliminates the visual discomfort of the connecting portion between the hosel 2 and the shaft 4. And a flange portion 7 for the purpose. The base portion 6 and the flange portion 7 are provided with through holes 8 through which the shaft 4 passes. The socket 5 is formed of an elastic material. Celluloid or cellulose (acetylcellulose) is preferably used as the elastic material from the viewpoint of easy molding and low cost.

  The outer radius A of the base 6 is smaller than the inner radius Z of the wide diameter portion of the insertion hole 3, and an annular convex portion 9 is formed on the outer peripheral surface thereof. A distance B from the top of the annular protrusion 9 to the center axis CL of the socket 5 is larger than the inner radius of the wide diameter portion of the insertion hole 3. The shape, number and position of the annular protrusions 9 are not particularly limited, but it is preferable that the cross section is semicircular and 2 to 4 are arranged at predetermined intervals in the axial direction. An annular concave portion 10 is formed on the outer peripheral surface below the annular convex portion 9. In addition, as shown in FIG. 3, the cyclic | annular convex part 9 can also be made into the shape extended continuously spirally in an axial direction.

  A method for mounting the socket 5 will be described below with reference to FIG.

  First, the socket 5 is mounted at a predetermined position on the tip side of the shaft 4 and inserted into the insertion hole 3 together with the shaft 4 in a state where the annular recess 10 is filled with the adhesive 12 (FIG. 4A). . Then, the base portion 6 of the socket 5 is gradually inserted into the gap 11 between the hosel 2 and the shaft 4, and is pushed in until the flange portion 7 comes into contact with the top portion of the hosel 2 (FIG. 4B).

  Accordingly, when the socket 5 is inserted into the gap 11 together with the hosel 2 and the shaft 4, the annular protrusion 9 is elastically deformed and crushed, so that it can be easily inserted between the hosel 2 and the shaft 4. In addition, after the mounting, the adhesive 12 filled in the annular recess 10 is hardened in a state where it is firmly bonded to the inner surface of the wide diameter portion of the insertion hole 3, so that vibration or the like occurs when the golf ball is hit. However, since the cured adhesive 12 engages with the annular recess 10 to prevent the socket 5 from coming off, the socket 5 does not rise. Further, since the socket 5 does not rise, the eccentricity of the shaft 4 with respect to the hosel 2 can be always prevented by the socket 5.

The axial cross-sectional area S at the crushing margin of the annular protrusion 9 in the socket 5 is desirably 0.05 to 0.23 mm ² . In addition, the crushing allowance of the annular convex portion 9 is a portion that is elastically deformed when the socket 5 is inserted between the hosel 2 and the shaft 4, and specifically, as shown in FIG. This is the outer portion when the annular convex portion 9 is divided by a virtual cylindrical surface R having the same inner radius Z as the wide diameter portion of the insertion hole 3 and having the same central axis CL. When the axial sectional area S of the crushing margin is less than 0.05 mm ² , the elastic force of the socket 5 that presses the hosel 2 outward is reduced, and the shaft 4 rattles against the head 1. If the cross-sectional area S exceeds 0.23 mm ² , it is difficult to insert the socket 5 between the hosel 2 and the shaft 4.

  The depth of the annular recess 10 is preferably in the range of 1/4 to 1/2 of the thickness of the base 6. If the depth is less than ¼, the effect of preventing the socket 5 from falling out is reduced, and if it is more than ½, the strength of the base 6 is reduced, and the socket 5 can be inserted between the hosel 2 and the shaft 4. It becomes difficult.

  As for the cross-sectional shape of the annular protrusion 9 in the axial direction, in addition to the semicircular shape as described above, a triangular shape whose outer diameter increases from the bottom to the top of the socket 5 as shown in FIG. . By adopting such a shape, the effect of preventing the socket 5 from being detached can be improved.

DESCRIPTION OF SYMBOLS 1 Head 2 Hosel 3 Insertion hole 4 Shaft 5 Socket 6 Base part 7 Flange part 8 Through-hole 9 Annular convex part 10 Annular recessed part 11 Crevice 12 Adhesive

Claims (5)

In the golf club in which a part of the socket is interposed between the hosel of the golf club head and the golf club shaft,
The socket is formed of an elastic material, and an annular convex portion and an annular concave portion are provided on the outer peripheral surface of the insertion portion of the socket, and the distance from the central axis of the socket to the top of the annular convex portion is the difference of the hosel. A golf club that is larger than the inner radius of the insertion hole. When the annular convex portion is separated by a virtual cylindrical surface having the same central axis as the socket and having the same inner radius as the insertion hole of the hosel, the axial section at the portion outside the virtual cylindrical surface is cut off. The golf club according to claim 1, wherein the area is 0.05 to 0.23 mm ² .   3. The golf club according to claim 1, wherein a depth of the annular recess is ¼ to ½ of a thickness of an insertion portion of the socket.   The golf club according to claim 1, wherein the annular convex portion extends spirally on the outer peripheral surface of the insertion portion of the socket.   The golf club according to claim 1, wherein the socket is made of celluloid or cellulose.

Images