JP4606491B2 - Golf club grip - Google Patents

Description

  The present invention relates to a grip structure employed in a golf club.

  A golf club generally includes a head, a shaft, and a grip. The golf player causes the head to collide with the golf ball by holding the grip and swinging the golf club. The energy of collision between the head and the golf ball causes the golf ball to fly at a predetermined speed. Further, since the shaft is elastically deformed when the golf club is swung, the elastic energy of the shaft also affects the initial velocity of the golf ball.

  Incidentally, a golf club generally has a structure in which the central axis of the shaft and the impact point of the head (the point at which the golf ball collides with the head) do not coincide. Therefore, a torsional moment (torque) acts on the shaft at the moment of impact between the head and the golf ball. This torque causes torsional deformation of the shaft, so that the direction of hitting the golf ball may become unintended by the golf player. In other words, the performance required of the shaft because the direction of the golf ball hitting matches the direction intended by the golf player is its torsional rigidity, and the shaft undergoes torsional deformation at the moment of impact between the head and the golf ball. It is important not to.

  On the other hand, what is important for a golf player when swinging a golf club is that the golf club can be gripped without slipping. That is, the basic performance required for the grip is generally a shape that is easy to grip, a hardness that is comfortable to grip, and a shock absorption that absorbs the impact of the impact between the head and the golf ball. A grip pursuing such basic performance has been conventionally proposed (for example, Patent Document 1 and Patent Document 2).

JP 2008-173978 A JP 2008-142281 A

  However, what is required for the grip is not only the shape, hardness, and shock absorption described above. As described above, in order for the golf ball to fly in the direction intended by the golf player, the torsional deformation does not occur in the shaft, but even if the torsional deformation does not occur in the shaft, the head and the golf ball When the grip is deformed by the impact of the impact, the result is the same as if the torsional deformation occurred in the shaft after all.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a grip for a golf club that hardly deforms even by impact impact between a head and a golf ball.

  (1) In order to achieve the above object, a golf club grip according to the present invention has a cylindrical grip body that can be attached to an end of a golf club shaft, and the grip body has a hardness of 40 to 60 ( It is made of JIS K 6253 type A) resin, and is provided with a plurality of recesses formed by the depression of the outer peripheral surface on the outer peripheral surface of the grip body. The corner of the wall surface of the recess is formed in an arc surface having a radius R, and the depth H of the recess is set to R ≦ H ≦ 2R.

  Since the grip body is made of the above-mentioned material, the grip body fits in the hand of the golf player when the golf player grips the grip body. When the hardness of the resin constituting the grip body is set to 40 to 50 (JIS K 6253 type A), the grip body is particularly moist with the golf player's hand. Further, since the grip body is made of the above material, the friction body has a large coefficient of friction with respect to the hand of the golf player (whether it is a bare hand or a glove may be attached). Moreover, since a plurality of recesses are formed on the outer peripheral surface of the grip body, the friction coefficient is further increased. Furthermore, since the corner of the wall surface of the recess is chamfered, deformation of the recess can be suppressed even when a torsional moment (torque) is applied to the grip body. In addition, since there is the above-described relationship between the depth H of the recess and the R dimension of the corner, the depth of the recess is relatively shallow, and therefore deformation of the recess is further suppressed.

  (2) It is preferable that the concave portion is composed of an elongated groove extending in the longitudinal direction of the grip body.

  Since the recess comprises an elongated groove extending in the longitudinal direction of the grip body, the deformation due to the action of the torque is further suppressed.

The center of the long groove information, but it may also have cutouts are cut in a direction perpendicular to the longitudinal direction of the grip body is provided.

(3) The depth H is preferably set to 0.22 mm or more and 0.36 mm or less .

(4) The above radius R is set below 0.22mm or 0.18mm is preferable.

  This dimension is optimal for a grip mounted on a golf club, and even when the golf player vibrates the golf club, the grip body hardly deforms.

  According to the present invention, since the concave portion provided in the grip body is hardly deformed by the impact of the golf club head and the golf ball, the performance (torsional rigidity) of the golf club shaft is sufficiently exhibited.

  Hereinafter, the present invention will be described in detail based on preferred embodiments with appropriate reference to the drawings.

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

  As shown in the figure, this golf club grip (hereinafter referred to as “grip”) 10 is employed in a golf club and mounted on a golf club shaft 11. The grip 10 includes a grip body 12 and an end cap 13. In the present embodiment, the grip body 12 is formed integrally with the end cap 13. However, in the present invention, the end cap 13 may be omitted.

  The grip body 12 is formed in an elongated cylindrical shape. The outer diameter of the front end portion 16 of the grip body 12 is set to 17 mm, and the outer diameter of the rear end portion 17 is set to 28 mm. But the outer diameter of the front-end | tip part 16 and the rear-end part 17 of the grip main body 12 is not limited to the said dimension, It can be suitably changed into the dimension which a golf player is easy to grasp. The grip body 12 is made of resin. The hardness of the resin constituting the grip body 12 is set to 50 (JIS K 6253 type A) in this embodiment. However, the hardness of the resin constituting the grip body 12 can be set to 40 to 60 (JIS K 6253 type A), but more preferably set to 40 to 50 (JIS K 6253 type A).

  On the other hand, the end cap 13 is also made of resin. The hardness of the resin constituting the end cap 13 is not particularly limited, but is preferably harder than the resin constituting the grip body 12. The end cap 13 is formed by injection molding. And the grip main body 12 is shape | molded by using this end cap 13 as insert goods, As a result, the grip 10 is comprised by what is called insert molding.

  As shown in the figure, the end of the golf club shaft 11 is inserted into the grip body 12. When the front end surface of the golf club shaft 11 abuts on the end cap 13, the grip 10 is securely attached to the golf club shaft 11. In the present embodiment, the grip body 12 is formed in a cylindrical shape. The reason is that the outer shape of the golf club shaft 11 is formed in a round bar shape. The inner diameter of the grip body 12 corresponds to the outer diameter of the golf club shaft 11 so that no gap is formed between them.

  The outer shape of the golf club shaft 11 may be other than a round bar shape. In that case, the inner wall surface shape of the grip body 12 is formed corresponding to the outer shape of the golf club shaft 11. At this time, the outer shape of the grip body 12 may be formed in a shape other than a round bar shape. In short, the grip body 12 only needs to be formed in a cylindrical shape. It should be noted that an adhesive or the like is interposed between the grip 10 and the golf club shaft 11 so that both are firmly fixed.

  As shown in the figure, a plurality of recesses 15 are provided on the outer peripheral surface 14 of the grip body 12. These recesses 15 are arranged so as to be uniformly and regularly distributed over the entire outer peripheral surface 14 of the grip body 12. The number of the recessed parts 15 is not specifically limited. In the present embodiment, the recesses 15 are juxtaposed at a pitch of 3 mm, for example, in the circumferential direction of the grip body 12, and are juxtaposed at a pitch of 5 mm, for example, in the longitudinal direction of the grip body 12. However, the pitch in the circumferential direction and the pitch in the longitudinal direction of the grip body 12 can be appropriately changed in design. In the present embodiment, the recesses 15 adjacent to each other in the longitudinal direction of the grip body 12 are offset from each other in the circumferential direction as shown in FIG. In addition, each recessed part 15 does not need to be offset in this way.

  FIG. 2 is an enlarged view of a main part of the grip body 12 and shows the shape of the recess 15 in detail.

  As shown in FIGS. 1 and 2, the recess 15 is provided on the outer peripheral surface 14 of the grip body 12, and is formed by the depression of the outer peripheral surface 14. In this embodiment, each recessed part 15 consists of an elongate groove. The recess 15 extends in the longitudinal direction 18 of the grip body 12. In the present embodiment, the length L of the recess 15 is set to 4.0 mm, and the width W is set to 0.8 mm. The length L can be set to about 2.5 mm to 8.0 mm, and the width W can be set to about 0.4 mm to 2.0 mm.

  3 is a sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 5 is a cross-sectional view taken along the line VV in FIG.

  As shown in FIGS. 3 and 5, the recess 15 includes a wall surface 19. The corner portion 20 of the wall surface 19 is chamfered. That is, a circular arc surface having a radius R is formed at the boundary between the bottom wall surface and the side wall surface of the wall surface 19 defining the recess 15, and the boundary portion between the side wall surface and the outer peripheral surface 14 of the grip body 12 in the wall surface 19. Also, an arc surface having a radius R is formed. In the present embodiment, the radius R is set to 0.2 mm. However, the radius R can be set to 0.18 mm or more and 0.22 mm or less.

  As shown in FIGS. 3 to 5, the depth H of the recess 15 is set to a predetermined dimension. There is a certain relationship between the depth H of the recess 15 and the radius R. That is, the depth H of the recess 15 is set to be in the range of R ≦ H ≦ 2R. In the present embodiment, the depth H is set to 0.3 mm. However, the depth H can be set to 0.22 mm or more and 0.36 mm or less.

  As shown in FIGS. 2 and 4, in the present embodiment, two notches 21 are provided in the center of the recess 15. These notches 21 are provided in all the recesses 15. The notch 21 extends in a direction perpendicular to the longitudinal direction 18 of the grip body 12 (width W direction of the recess 15). The extending dimension P of the notch 21 can be set from 0.1 mm to 0.3 mm. The two notches 21 are arranged symmetrically.

  The notch 21 is formed so as to cut out the wall surface 19 of the recess 15, and is continuous with the recess 15. As shown in FIG. 2, the tip of the notch 21 is formed in an arc shape, and the boundary portion 22 between the notch 21 and the recess 15 is also formed in a smooth curved surface. Moreover, as FIG. 4 shows, the circular arc surface of radius R is formed in the boundary part of a bottom wall surface and a side wall surface among the wall surfaces (it is continuous with the said wall surface 19) which defines the notch part 21. As shown in FIG. Further, an arc surface having a radius R is also formed at a boundary portion between the side wall surface and the outer peripheral surface 14 of the grip body 12 in the wall surface defining the notch 21. As described above, in the present embodiment, the radius R is set to 0.2 mm, and the radius R can be changed in design within a range of 0.18 mm to 0.22 mm.

  In the grip 10 according to the present embodiment, since the grip body 12 is made of the above-described resin, when the golf player grips the grip body 12, the grip body 12 fits in the hand of the golf player. This effect is achieved by setting the hardness of the resin constituting the grip body 12 to 40 to 60 (JIS K 6253 type A), but it is set to a range of 40 to 50 (JIS K 6253 type A). It becomes even more remarkable. In addition, since the grip body 12 is made of the above-described resin, the coefficient of friction of the grip body 12 with respect to the golf player's hand (the bare hand or the glove when a glove is worn) increases. Therefore, the grip 10 is easy to grip and slippery for the golf player. Furthermore, since the said recessed part 15 is formed in the outer peripheral surface 14 of the grip main body 12, the said friction coefficient becomes still larger, and the grip 10 exhibits the high slip prevention effect.

  In addition, since the corner portion 20 of the wall surface 19 of the concave portion 15 is so-called chamfered, even if a torsional moment (torque) acts on the grip body 12, it is avoided that stress is concentrated on the corner portion 20. . Therefore, deformation of the recess 15 is suppressed. Moreover, since there is the above-described relationship between the depth H of the recess 15 and the radius R of the corner portion 20, the recess 15 relatively forms a so-called shallow groove. That is, since the depth H is smaller than the length L and the width W of the recess 15, deformation of the recess 15 when a torque is applied is further suppressed. As described above, since the deformation of the recess 15 is effectively suppressed with respect to the torque, the grip body 12 is hardly deformed even by an impact between the golf club head and the golf ball. As a result, the performance (torsional rigidity) of the golf club shaft 11 is sufficiently exhibited.

  In particular, in the present embodiment, the recess 15 is composed of an elongated groove extending in the longitudinal direction 18 (see FIG. 1), and therefore, there is an advantage that deformation of the recess 15 due to the action of the torque can be further suppressed. is there.

  In addition, since the notch 21 is provided in the center of the recess 15, deformation of the recess 15 in the circumferential direction (direction perpendicular to the longitudinal direction 18) due to the torque is suppressed, and the entire recess 15 is There is an advantage that deformation is further suppressed.

  The radius R is set to 0.18 mm or more and 0.22 mm or less, and the depth H is set to 0.22 mm or more and 0.36 mm or less. An optimum design is realized in which the main body 12 hardly deforms.

  The present invention can be applied to a grip attached to a golf club.

FIG. 1 is a perspective view of a grip according to an embodiment of the present invention. FIG. 2 is an enlarged view of a main part of the grip body according to the embodiment of the present invention. 3 is a sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 5 is a cross-sectional view taken along the line VV in FIG.

DESCRIPTION OF SYMBOLS 10 ... Grip 11 ... Golf club shaft 12 ... Grip main body 14 ... Outer peripheral surface 15 ... Recessed part 18 ... Longitudinal direction 19 ... Wall surface 20 ... Corner | angular part 21 ... Notch 22 ... Boundary part L ... Length of recess W ... Width of recess H ... Depth of recess P ... Extension dimension of notch

Claims (4)

It has a cylindrical grip body that can be attached to the end of the golf club shaft,
The grip body is made of a resin having a hardness of 40 to 60 (JIS K 6253 type A),
The outer peripheral surface of the grip body is provided with a plurality of recesses formed by the depression of the outer peripheral surface,
The corner of the wall surface of the recess is formed in an arc surface having a radius R,
A golf club grip in which the depth H of the recess is set to R ≦ H ≦ 2R.   The golf club grip according to claim 1, wherein the concave portion is formed by an elongated groove extending in a longitudinal direction of the grip body. The golf club grip according to claim 1 or 2, wherein the depth H is set to 0.22 mm or more and 0.36 mm or less . The radius R, the golf club grip according to any one of claims 1 to 3 which is set to not more than 0.18 mm 0.22 mm.

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