JP4606499B2 - Golf club grip - Google Patents

Description

  The present invention relates to a structure of a golf club grip.

  In general, a golf club is composed of a head, a shaft, and a grip. A conventional grip is made of, for example, a silicone resin. By constructing grips from these materials, it is possible to improve the grip sensation (gripping comfort) when a golfer grips a golf club, improve the grip prevention effect, and improve the resistance to grip deterioration. (Patent Document 1).

  By the way, the collision angle between the face of the head and the ball when the golfer hits the ball has a great influence on the hitting direction. In order for the ball to fly in the direction intended by the golfer, it is important that the ball hits the head face perpendicularly. Also, the impact force applied to the golf club at the moment of impact is large. Conventionally, this impact force has been considered to have the following effects on golf clubs. That is, this impact force causes torsional deformation of the shaft. Therefore, the face of the head hits at an angle inclined from the perpendicular to the ball, and as a result, the hitting direction is deviated from the direction intended by the golfer. Based on such an idea, various countermeasures for suppressing torsional deformation of the shaft have been conventionally proposed (for example, see Patent Documents 2 to 4).

JP 2008-173978 A JP 2007-275443 A JP 2004-275324 A JP 2007-117109 A

  As described above, conventionally, it has been considered that the deviation in the hitting direction is mainly caused by the torsion of the shaft. However, even if the torsional rigidity of the shaft is improved, a phenomenon occurs in which the hitting ball direction deviates from the direction intended by the golfer. The inventor of the present application paid attention to the fact that the grip, which is a component of the golf club, is much more elastic than the shaft while studying the cause of this phenomenon. That is, the inventor of the present application clearly shows that the impact force causes torsional deformation of the shaft, but the collision angle shift between the head face and the ball is greatly caused by elastic deformation of the grip due to the impact force. The knowledge that it depends is obtained.

  Then, the inventor of the present application considered that the shift of the collision angle between the head face and the ball can be effectively suppressed by improving the structure of the grip. However, on the other hand, in order to improve the grip feeling as described above, there is also a request that a soft resin should be adopted as a constituent material of the grip, and when the grip is configured with such a soft material It is clear that the torsional rigidity of the grip is reduced.

  The present invention has been made based on such a background, and an object of the present invention is to provide a golf club grip that can fly a ball in a direction intended by a golfer and that exhibits a good grip feeling and antiskid effect. Is to provide.

(1) In order to achieve the above object, a golf club grip according to the present invention includes a cylindrical inner made of a first resin and a first pitch in the circumferential direction on the outer peripheral surface of the cylindrical inner and the longitudinal direction. Insert molding with a second resin having a lower hardness than the first resin so that the cylindrical inner is covered with a plurality of engaging protrusions arranged in parallel at the second pitch and the cylindrical inner as an insert member The engaging projection has a cross-sectional shape that is a triangle with a tip protruding toward the cylindrical outer, and the tip is fused with the cylindrical outer by insert molding. ing.

  This golf club grip has a two-layer structure. The golf club grip is fitted to the end of the golf club shaft. That is, the shaft of the golf club is inserted into the cylindrical inner. The cylindrical inner and the shaft are preferably fixed by, for example, an adhesive or other fixing means. A cylindrical outer is provided so as to cover the cylindrical inner. Since the cylindrical outer is insert-molded with the cylindrical inner as an insert member, both are firmly fixed and integrated. When the golfer grips the golf club grip, the cylindrical outer is gripped by hand. At this time, the cylindrical outer is made of a material (second resin) having a hardness lower than that of the cylindrical inner, so that the golfer can obtain a good grip feeling of the golf club grip. The cylindrical inner is made of a resin (the first resin) that is harder than the cylindrical outer. Therefore, the cylindrical inner and the shaft are firmly fixed.

  In addition, due to the presence of this cylindrical inner, the thickness of the cylindrical outer becomes relatively small. In other words, since the golf club grip is gripped by the golfer, the outer diameter and thickness of the golf club are naturally limited to a certain range. The thickness t of the golf club grip is the sum of the thickness t1 of the cylindrical inner and the thickness t2 of the cylindrical outer, so that the cylindrical inner made of a hard material is disposed. Thus, the thickness of the portion made of a soft material in the grip for the golf club (that is, the thickness t2 of the cylindrical outer) becomes relatively small. The degree of deformation of the golf club grip largely depends on the deformation of the cylindrical outer made of the soft second resin. Then, the torsional rigidity of the golf club grip is improved by providing the cylindrical inner made of a hard material.

Since the engagement projection provided on the outer peripheral surface of the cylindrical inner is in a state of biting in the radial direction (thickness direction) of the cylindrical outer, the cylindrical inner and the cylindrical outer are more firmly fixed. When a couple acts on the golf club grip, relative displacement of the cylindrical outer with respect to the cylindrical inner is suppressed. Moreover, since the thickness of the cylindrical outer is further reduced at the portion where the engagement protrusion is provided, the deformation of the cylindrical outer is further suppressed. Therefore, the torsional rigidity of the golf club grip is further improved.

The engaging protrusions are juxtaposed at a first pitch in the circumferential direction and juxtaposed at a second pitch in the longitudinal direction, and the engaging protrusions are intermittently and evenly distributed over the entire outer peripheral surface of the cylindrical inner. Since it will be arrange | positioned, the site | part in which this engagement protrusion is not arrange | positioned will also exist equally. That is, the part where the thickness of the cylindrical outer is relatively large is evenly scattered on the entire outer peripheral surface of the golf club grip. Therefore, the grip feeling when the golfer grips the golf club grip is further improved while the torsional rigidity of the golf club grip is maintained high.

The cross-sectional shape of the engaging protrusion is formed in a triangle projecting toward the cylindrical outer side, and when the cylindrical outer is molded, the tip of the engaging protrusion is fused with the cylindrical outer. Yes . As a result, the coupling between the cylindrical inner and the cylindrical outer becomes even stronger. As a result, the torsional rigidity of the golf club grip is further improved.

(2) It is preferable that the engaging protrusion is composed of a protrusion extending in the longitudinal direction.

  In this structure, this engagement protrusion exhibits the function of the key which connects a cylindrical inner and a cylindrical outer. Therefore, since the cylindrical inner and the cylindrical outer are more firmly fixed, the torsional rigidity of the golf club grip is further improved.

(3) The engagement protrusion may be exposed on the surface of the cylindrical outer.

  According to this configuration, when the golfer grips the golf club grip, the engagement protrusion comes into contact with the golfer's hand. Since the engaging projection is made of the hard resin (first resin), it is caught by the golfer's hand. That is, there is an advantage that an antiskid effect is exhibited.

(4) The hardness of the second resin is preferably set to 48 to 52 (JIS K 6253 type A).

  With this configuration, a very high grip feeling can be obtained when the golfer holds the golf club grip.

  According to the present invention, since the torsional rigidity of the entire golf club grip is improved by providing a cylindrical inner made of a hard resin on the inside, twisting of the golf club grip when a golfer hits the ball can be suppressed. The ball hits in the direction the golfer intended. Moreover, since the cylindrical outer made of a soft resin is provided outside the golf club grip, the golfer can obtain a good grip feeling.

FIG. 1 is a front view of a grip according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of a grip according to an embodiment of the present invention. FIG. 3 is a front view of an inner according to an embodiment of the present invention. FIG. 4 is a partial cross-sectional front view of an inner according to an embodiment of the present invention. FIG. 5 is an enlarged view of a protrusion according to an embodiment of the present invention. 6 is a cross-sectional view taken along line VI-VI in FIG. FIG. 7 is a partial cross-sectional side view of an end cap according to an embodiment of the present invention. 8 is a view taken along arrow XIII in FIG. FIG. 9 is an IX-arrow view in FIG. FIG. 10 is a front view of a grip according to a modification of the embodiment of the present invention. FIG. 11 is a partial sectional plan view of a grip according to a second modification of the embodiment of the present invention. FIG. 12 is a partial cross-sectional front view of a grip according to a second modification of the embodiment of the present invention. FIG. 13 is a plan view of an inner according to a second modification of the embodiment of the present invention. FIG. 14 is a front view of the inner according to the second modification of the embodiment of the present invention. FIG. 15 is an enlarged cross-sectional view of a main part in FIG. FIG. 16 is an enlarged cross-sectional view of a main part in FIG.

  Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings as appropriate. Each embodiment shown below is only one embodiment of the present invention, and needless to say, the embodiment can be appropriately changed without changing the gist of the present invention.

[Outline of grip for golf club]

  FIG. 1 is a front view of a golf club grip (hereinafter referred to as “grip”) 10 according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view.

  The grip 10 is attached to a golf club (especially a wood club and an iron club). Specifically, as shown in FIG. 1, the grip 10 is fitted and fixed to the rear end portion of the shaft 11 of the golf club. The shaft 11 is formed in a rod shape with a circular cross section, and is made of carbon fiber reinforced resin or the like in addition to steel. A club head is attached to the tip of the shaft 11.

  The grip 10 is a member that is gripped when the golfer uses the golf club, and therefore is required to have a shape that is easy for the golfer to grip. Therefore, the grip 10 according to the present embodiment is formed in a cylindrical shape, and its cross-sectional shape is a circle. The shaft 11 is inserted into the grip 10. In addition, the cross-sectional shape of a grip is not limited to a circle, and may be a polygon.

  A feature of the grip 10 according to the present embodiment is that it has a double structure as shown in FIG. 2, and the hardness of the outer portion (outer 13 described later) is higher than the hardness of the inner portion (inner 12 described later). Is a low point. That is, the outer part is soft and the inner part is hard. By providing the grip 10 with such a structure, the golfer can obtain a high grip feeling and the torsional rigidity of the grip 10 is improved.

[Grip structure]

  As shown in FIG. 2, the grip 10 includes a grip body 14 having an inner 12 and an outer 13, and an end cap 15 provided at the rear end of the grip body 14. As described above, the grip 10 has a cylindrical shape as a whole, but the outer diameter of the front end portion 16 of the grip 10 is smaller than the outer diameter of the rear end portion 17 of the grip 10. For this reason, the outer shape of the grip 10 has a tapered shape, and the grip 10 gradually increases from the front end portion 16 toward the rear end portion 17. By providing the grip 10 with such a shape, the golfer can reliably grip the grip 10.

[inner]

  3 is a front view of the inner 12, and FIG. 4 is a partially sectional front view.

  The inner 12 includes an inner main body 18 and a protrusion 19 (engagement protrusion) provided on the inner main body 18. In the present embodiment, the end cap 15 is fixed to the inner body 18. The inner body 18 is made of resin (first resin) and is formed by injection molding. The type of resin constituting the inner body 18 is not particularly limited. However, the hardness of the inner body 18 is set to 75 to 80 (JIS K 6253 type A). In the present embodiment, the hardness of the inner body 18 is set to 75 (JIS K 6253 type A).

  The inner main body 18 has a cylindrical shape as a whole. The inner diameter d1 of the inner body 18 corresponds to the outer diameter of the shaft 11 (see FIG. 2). The outer diameter D1 of the front end portion 20 of the inner main body 18 is smaller than the outer diameter D2 of the rear end portion 21 of the inner main body 18. For this reason, the outer shape of the inner main body 18 has a tapered shape, and the inner main body 18 gradually increases from the front end portion 20 toward the rear end portion 21. A connecting portion 25 is formed at the rear end portion 21 of the inner body 18. The connecting portion 25 is formed in a cylindrical shape. The connecting portion 25 is provided integrally with the rear end portion 21 and protrudes in the longitudinal direction. In the present embodiment, the length of the inner body 18 is set to 200 mm, the outer diameter D1 of the front end portion 19 is set to 16.0 mm, and the outer diameter D2 of the rear end portion is set to 24.0 mm. However, the design of the size of the inner body 18 can be changed as appropriate.

  FIG. 5 is an enlarged view of the ridge 19. 6 is a cross-sectional view taken along line VI-VI in FIG.

  As shown in FIG. 5, the protrusion 19 is formed in an elongated rod shape. As shown in FIGS. 4 and 5, the protrusion 19 is formed integrally with the inner body 18 by injection molding. In the present embodiment, as shown in FIG. 3, a plurality of protrusions 19 are provided on the outer peripheral surface 29 of the inner body 18, and each protrusion 19 extends in the longitudinal direction of the inner body 18. Further, the protrusions 19 are arranged in parallel in the circumferential direction of the inner body 18 at a pitch p1 (first pitch). Further, the protrusions 19 are arranged in parallel in the longitudinal direction of the inner body 18 at a pitch p2. That is, the protrusions 19 are arranged so as to be distributed substantially evenly in the circumferential direction and the longitudinal direction of the inner body 18. In the present embodiment, the plurality of protrusions 19 are regularly and substantially uniformly distributed, but the plurality of protrusions 19 may not be approximately evenly distributed. Further, the number of protrusions 19 is not particularly limited. Furthermore, the protrusions 19 may be continuous in the longitudinal direction. In other words, the ridges extending in the longitudinal direction may be arranged uniformly in the circumferential direction to constitute a spline. In the present embodiment, the width dimension a of the protrusion 19 is set to 1.0 mm, the length dimension b is set to 10.0 mm, and the height dimension h is set to 0.7 mm. However, each of these dimensions is an example, and the design can be changed as appropriate according to the size of the inner body 18.

  FIG. 7 is a partial cross-sectional side view of the end cap 15. 8 and 9 are XIII-arrow view and IX-arrow view in FIG. 7, respectively.

  The end cap 15 is formed in a disc shape. The end cap 15 is fitted into the rear end of the inner body 18 as shown in FIG. The end cap 15 has a fitting portion 22 and a flange portion 23, which are integrally formed. The end cap 15 is made of resin and is formed by injection molding. The hardness of the end cap 15 is set to 75 to 85 (JIS K 6253 type A). In the present embodiment, the hardness of the end cap 15 is set to 80 (JIS K 6253 type A). A concave portion 24 is provided in the fitting portion 22. The inner diameter of the recess 24 corresponds to the outer diameter of the connecting portion 25 provided at the rear end portion 21 of the inner body 18. For this reason, the connecting portion 25 is fitted into the recess 24 of the end cap 15 without a gap. As shown in FIG. 8, a small hole 26 is provided in the center of the flange portion 23. The small hole 26 passes through the flange portion 23 and reaches the concave portion 24. The outer diameter of the flange portion 23 is equal to the outer diameter of the grip 10.

  The inner 12 is configured by insert-molding the inner body 18 using the end cap 15 as an insert material. Therefore, the rear end portion 21 of the inner body 18 is securely fixed to the end cap 15. That is, as shown in FIG. 4, the coupling portion 25 provided in the inner body 18 is fixed to the recess 24 (see FIG. 7) of the end cap 15, and the fitting portion 22 of the end cap 15 is the rear end of the inner body 18. It adheres to the part 21.

[outer]

  As FIG.1 and FIG.2 shows, the outer 13 consists of resin (2nd resin), and is comprised by injection molding. The kind of resin which comprises the outer 13 is not specifically limited. The hardness of the outer 13 is set to 50 (JIS K 6253 type A), but is preferably set to 45 to 55 (JIS K 6253 type A), and 48 to 52 (JIS K 6253 type A). More preferably, it is set. However, the hardness of the outer 13 is not particularly limited as long as it is lower than the inner body 18. In other words, the outer 13 may be a member that is softer than the inner body 18 as a physical property.

  The outer 13 has a cylindrical shape as a whole. The inner diameter dimension d1 of the outer 13 is the same as the inner diameter dimension d1 of the inner body 18 and corresponds to the outer diameter dimension of the shaft 11 (see FIG. 2). As shown in FIG. 2, the outer diameter D3 of the distal end portion 27 of the outer 13 is smaller than the outer diameter D4 of the rear end portion 28 of the outer 13. For this reason, as with the inner body 18, the outer shape of the outer 13 is tapered, and the outer 13 gradually increases from the front end portion 27 toward the rear end portion 28. The outer diameter D3 of the rear end portion 28 of the outer 13 is matched with the outer diameter of the end cap 15. In this embodiment, the outer length dimension is set to 260 mm, the outer diameter D3 of the front end portion 27 is set to 17.0 mm, and the outer diameter D4 of the rear end portion is set to 30.0 mm. However, the size of the outer 13 can be appropriately changed in accordance with the size of the inner body 18.

  The outer 13 is configured by insert molding using the inner main body 18 as an insert material. That is, as shown in FIG. 2, the outer 13 is molded by the resin so as to cover the inner body 18. Thereby, the outer 13, the inner main body 18 and the end cap 15 are securely fixed to each other. That is, they are firmly fixed together. Thus, the grip 10 shown in FIG. 1 is formed by insert molding the outer 13.

[Grip effect]

  The grip 10 is attached to the shaft 11 of the golf club in the state shown in FIG. The golfer holds the grip 10 and swings the golf club. As a result, the golf club head and the ball collide, and the ball flies in a predetermined direction.

  The grip 10 has the two-layer structure as described above, and the inner 12 and the outer 13 are firmly fixed. The golfer grips the outer 13 when gripping the grip 10. Since the outer 13 is made of a softer resin than the inner 12, the golfer can obtain a good grip feeling. In particular, in this embodiment, since the hardness of the resin constituting the outer 13 is set to 48 to 52 (JIS K 6253 type A), a very high grip feeling can be obtained when the golfer holds the grip 10.

  Since the grip 10 has a two-layer structure of the inner 12 and the outer 13, the inner 12 made of a hard material exists inside the grip 10. The thickness t of the grip 10 is the sum of the thickness t1 of the inner body 18 and the thickness of the outer 13, and this dimension t is a value within a certain range that is easily gripped by the golfer. Become. Therefore, by arranging the inner 12 made of a hard material, the thickness of the portion made of the soft material in the grip 10 (that is, the outer wall thickness t2) is relatively smaller than that in the case where the inner 12 is not present. Become. The impact force generated when the golfer hits the ball acts as a couple on the grip 10 to cause torsional deformation, and the degree of deformation of the grip 10 greatly depends on the deformation of the outer 13 made of a soft resin. Therefore, when the grip 10 includes the inner 12 made of a hard material, the thickness t2 of the outer 13 that is easily deformed is reduced, and as a result, the torsional rigidity of the grip 10 is improved.

  By improving the torsional rigidity of the grip 10, the twist of the grip 10 when the golfer hits the ball is suppressed, so that the collision angle between the ball and the head face at the moment of impact is kept at a right angle. Therefore, the effect that the hit ball flies in the direction intended by the golfer is exhibited.

  In the present embodiment, a plurality of protrusions 19 are provided on the outer peripheral surface 29 of the inner body 18, and these protrusions 19 are engaged with the outer 13. Since the inner body 18 and the outer 13 are integrally formed, the protrusion 19 protrudes in the radial direction (thickness direction) of the outer 13 and bites into the outer 13. Thereby, the inner main body 18 and the outer 13 are more firmly fixed. Therefore, when the couple acts on the grip 10, the relative displacement of the outer 13 with respect to the inner 12 is suppressed. In addition, since the protrusion 19 bites into the outer 13, the thickness of the outer 13 is further reduced at the portion where the protrusion 19 is provided. Therefore, the deformation of the outer 13 is further suppressed, and the torsional rigidity of the grip 10 is further improved. As a result, there is an effect that the hit ball accurately flies in the direction intended by the golfer.

  In the present embodiment, the ridges 19 are disposed evenly and intermittently over the entire outer peripheral surface 29 of the inner body 18 as shown in FIG. That is, the part where the ridges 19 are not arranged is also distributed evenly. In other words, the relatively thick portions of the outer 13 are scattered evenly on the entire outer peripheral surface of the grip 10. Therefore, there is an advantage that the grip feeling when the golfer grips the grip is further improved while the torsional rigidity of the grip 10 is maintained high.

  In particular, in the present embodiment, the ridge 19 extends in the longitudinal direction of the inner 12. For this reason, the protrusion 19 functions as a key for connecting the inner 12 and the outer 13. Therefore, the inner 12 and the outer 13 are more firmly fixed, with the result that the torsional rigidity of the grip 10 is further improved.

  Furthermore, in this embodiment, as FIG.3 and FIG.6 shows, the cross-sectional shape of the protrusion 19 is a triangle, and protrudes to the outer 13 side. For this reason, when the outer 13 is insert-molded, the tip portion 30 (see FIG. 6) of the protrusion 19 is melted and fused with the outer 13. Actually, the tip portion 30 of the ridge 19 has a shape as indicated by a two-dot chain line 31 in FIG. Thereby, the coupling | bonding of the inner 12 and the outer 13 becomes still stronger, and the torsional rigidity of the grip 10 is further improved.

[Modification]

  FIG. 10 is a front view of a grip 40 according to a modification of the embodiment.

  As shown in the figure, the grip 40 according to this modified example is different from the grip 10 according to the above-described embodiment in that the protrusion 19 is embedded in the outer 13 in the above-described embodiment. In the example, the protrusion 19 is exposed on the surface 41 of the outer 13. The other configuration of the grip 40 is the same as that of the grip 10.

  Thus, when the ridge 19 is exposed on the surface 41 of the outer 13, the tip end surface of the ridge 19 exposed when the golfer grips the grip 40 comes into contact with the golfer's hand. Since the protrusion 19 is made of the hard resin as described above, the protrusion 19 is reliably caught on the golfer's hand. That is, there is an advantage that a high antiskid effect is exhibited.

  11 and 12 are a partial cross-sectional plan view and a partial cross-sectional front view of a grip according to a second modification. 13 and 14 are a plan view and a front view of the inner according to the second modification. 15 is an enlarged cross-sectional view of the main part in FIG. 13, and FIG. 16 is an enlarged cross-sectional view of the main part in FIG.

  The grip 50 according to this modification is particularly configured for a putter club. The grip 50 is required to have a shape that is easy for a golfer to grip when putting. Therefore, the grip 50 is formed in a cylindrical shape, and its cross-sectional shape is substantially a cam shape. The grip 50 according to this modified example also has a double structure having an inner 52 and an outer 53, like the grip 10 according to the above embodiment. The hardness of the outer 53 is lower than the hardness of the inner 52.

  As shown in FIGS. 11 and 12, the grip 50 includes a grip body 54 having an inner 52 and an outer 53, and an end cap 55 provided at the rear end of the grip body 54. Similar to the grip 10 according to the above-described embodiment, the outer shape of the grip 50 is tapered, and the grip 50 gradually increases from the front end portion 56 toward the rear end portion 57. By providing the grip 50 with such a shape, the golfer can reliably grip the grip 50.

  As shown in FIGS. 13 and 14, the inner 52 has an inner main body 58 and a protrusion 19 (engagement protrusion) provided on the inner main body 58. Also in this modification, the end cap 55 is fixed to the inner body 58. The inner body 58 is made of resin (first resin) and is formed by injection molding. The type of resin constituting the inner body 58 is not particularly limited. The hardness of the inner body 58 is set to 75 to 80 (JIS K 6253 type A) as in the above embodiment. In this modification, the hardness of the inner body 58 is set to 75 (JIS K 6253 type A).

  The ridge 19 is formed in an elongated rod shape, and has the same configuration as the ridge 19 according to the embodiment. Therefore, the detailed description about the protrusion 19 is abbreviate | omitted. The end cap 55 is formed in a substantially cam shape. The end cap 55 is fitted into the rear end of the inner main body 58. As FIG.15 and FIG.16 shows, the end cap 55 has the fitting part 62 and the flange part 63, and these are integrally formed. The end cap 55 is made of resin and is formed by injection molding. The hardness of the end cap 55 is the same as that of the end cap 15 according to the above embodiment. A concave portion 64 is provided in the fitting portion 62. The shape of the recess 64 is the same as that of the grip 10 according to the embodiment. The inner 52 is configured by insert molding the inner main body 58 using the end cap 55 as an insert material. This is the same as the above embodiment.

  As shown in FIGS. 11 and 12, the outer 53 is made of resin (second resin) and is formed by injection molding. The type of resin constituting the outer 53 is not particularly limited. The hardness of the outer 53 is set to 40 to 60 (JIS K 6253 type A) as in the above embodiment. In this modification, the hardness of the outer 53 is set to 50 (JIS K 6253 type A), but is preferably set to 45 to 55 (JIS K 6253 type A), and 48 to 52 (JIS K 6253). More preferably it is set to type A). However, the hardness of the outer 53 is not particularly limited as long as it is lower than the inner body 58. In other words, the outer 53 may be a member that is softer than the inner body 58 as a physical property. The outer 53 is configured by insert molding using the inner main body 58 as an insert material. That is, as shown in the figure, the outer 53 is molded by the resin so as to cover the inner body 58. This is the same as the above embodiment.

  The grip 50 according to this modification also has the same effects as the grip 10 according to the above embodiment. In particular, the grip 50 according to the present modification exhibits the following effects. In general, a golfer gently grips a putter club when putting and puts the ball carefully with great care. In view of ergonomics, it is desirable that the outer shape of the grip be set large in order for the golfer to grip the grip gently. However, if the thickness of the grip 50, particularly the outer 53, is set to be large, the torsional rigidity of the grip 50 is extremely reduced. For this reason, the grip 50 may be twisted and deformed, and accurate putting may be difficult. On the other hand, especially in putting, there is a special circumstance that it is desirable that the golfer can feel the deformation of the grip to some extent at the moment of impact in order to obtain an accurate putting feeling. In the grip 50 according to this modification, the torsional rigidity is improved by providing the double structure as described above, and the outer shape of the outer 53 is formed as described above, so that the required deformation at the moment of impact is achieved. Occurs. Therefore, the grip 50 gives a very high grip feeling for a putter.

DESCRIPTION OF SYMBOLS 10 ... Grip 12 ... Inner 13 ... Outer 14 ... Grip main body 19 ... Projection

Claims (4)

A cylindrical inner made of a first resin;
A plurality of engaging protrusions arranged side by side at a first pitch in the circumferential direction and at a second pitch in the longitudinal direction on the outer peripheral surface of the cylindrical inner;
A cylindrical outer insert-molded with a second resin having a lower hardness than the first resin so that the cylindrical inner is covered with the cylindrical inner as an insert member ;
A golf club grip in which the cross-sectional shape of the engagement protrusion is a triangle with a tip portion protruding toward the cylindrical outer side, and the tip portion is fused with the cylindrical outer by the insert molding . The golf club grip according to claim 1 , wherein the engagement protrusion is a protrusion extending in the longitudinal direction. The golf club grip according to claim 1 , wherein the engagement protrusion is exposed on a surface of the cylindrical outer. The golf club grip according to any one of claims 1 to 3 , wherein the hardness of the second resin is 48 to 52 (JIS K 6253 type A).

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