CN103520891B - Golf clubs - Google Patents

Abstract

The present invention provides a golf club in which a weight-increasing member is arranged on a structural part connecting a shaft and a head, and a low center of gravity design can be realized without affecting the moment of inertia around the axial direction of the shaft. The golf club comprises: a club head (10); a shaft (S), which is connected via a bush (17) which can be inserted into its hosel (16); a screw part (25 ), which fixes the bushing (17) in the hosel (16); the club head (10) has a Recess (13A). The screw part (25) installs the weight part (WT) around its axial direction to form the hammer part (W), and is arranged in the recess (13) and threadedly engaged with the bushing (17) to simultaneously fix the shaft (S ) and install the hammer assembly (W).

Description

Golf clubs

technical field

The present invention relates to a golf club, and more specifically, to a golf club in which a hammer member can be arranged on the axis of the shaft by utilizing a structure that connects the head and the shaft.

Background technique

For example, Patent Document 1 discloses a connection structure between a head and a shaft of a golf club. In the connection structure described in this document, the front end of the shaft is inserted into the bushing and the two are fixed by means of adhesive, etc., and the bushing is inserted into the hosel portion of the club head, and is formed on the bottom surface of the club head. A screw member is arranged in the concave portion on the side, and the shaft and the head can be connected by screwing the screw member into the front end side of the bush in the insertion direction.

Patent Document 1: (Japanese) Unexamined Patent Publication No. 2009-291602

However, in the golf club described in Patent Document 1, the screw member is a dedicated member for fixing the shaft to the head via the bushing. Therefore, for example, when it is desired to set the center of gravity of the club head low, it is necessary to dispose the hammer member at another location away from the axis of the shaft. In this case, the moment of inertia of the club head about the axial direction of the shaft increases, resulting in a disadvantage that the club becomes difficult to control the shot.

Contents of the invention

It is an object of the present invention to provide a golf club in which a hammer member can be arranged at a structural part connecting the shaft and the head, and can realize low golf clubs without affecting the moment of inertia around the axial direction of the shaft. Center of gravity design.

In order to achieve the above object, the present invention adopts the structure described in the claimed technical solution, specifically, adopts the following structure, that is, a golf club comprising: a club head; To be connected, the bushing can be inserted into the hosel formed on the heel side of the head; a screw part, which connects the bushing to the bottom of the hosel; There is a recess on the central axis of the hosel portion on the bottom surface, and when a weight member (ウェイト member) is integrated with the screw member to form a hammer member, the screw member is moved from the recess to the hammer member. The insertion direction front end of the bush passes through the bottom portion of the hosel portion and is threadedly engaged with the insertion direction front end of the bush, thereby fixing the shaft to the club head.

In addition, it is preferable that the bush has an internally threaded portion formed at a front end portion in the insertion direction, and a central axis of the internally threaded portion coincides with a central axis of the hosel portion.

In addition, it is preferable that the central axis of the concave portion of the head coincides with the central axis of the hosel.

In addition, in the present invention, it is preferable to adopt a structure in which the weight of the hammer member is heavier than the weight of the bushing, and the weight of the hammer member is preferably set to 1.5 times or more than the weight of the bushing, more preferably 2.0 times the weight of the bushing. more than double. This is because the effect of lowering the center of gravity can be more exhibited by setting it at 1.5 times or more.

Moreover, it is preferable that the said weight-increasing member has a through-hole through which the said screw member penetrates, and is replaceable among the some weight-increasing members of different weights.

In addition, it is preferable that the golf club includes: a first hammer member that is detachable and disposed on the heel side as the hammer member; and a second hammer member that can be The first hammer member and the second hammer are disassembled and arranged at the toe side of the club head; when the club head is facing the face angle of the target, the first hammer member and the second hammer The components are at a predetermined height with respect to the sole ground contact surface, and are arranged on the same plane parallel to the club face.

In addition, it is preferable that at least one of the first hammer member and the second hammer member is configured to be interchangeable among a plurality of hammer members having different weights.

According to the present invention, by screwing the screw member and the bushing, not only the shaft and the head can be connected, but also the weight-increasing member constituting the hammer member together with the screw member can be attached at the same time. Center of gravity design. Furthermore, since the weighted member is arranged on the axis of the shaft, it is possible to provide a golf club that is easy to control without affecting the moment of inertia around the axis of the shaft.

In addition, the head can be designed with a low center of gravity only by making the weight of the hammer member heavier than that of the bushing.

Furthermore, by selecting from a plurality of weight-increasing members with different weights and attaching them to the club head, the most suitable weight-increasing member can be attached according to the needs and individuality of the user, and the present invention can be widely applied.

Furthermore, on the premise that the first hammer member and the second hammer member are arranged on the heel side and the toe side, these hammer members are detachably installed on the same plane parallel to the club face at a predetermined height with respect to the sole contact surface. Therefore, the relative weight difference between the first hammer member and the second hammer member can be changed, and only the distance of the center of gravity can be shifted to the toe side or the heel side while maintaining the depth and height of the center of gravity. It is possible to adjust according to the individuality of the user by adjusting the characteristics regarding the return of the club head.

Furthermore, by selecting from a plurality of hammer members with different weights and attaching them to the club head, the most suitable hammer member can be attached according to the needs and individuality of the user, and the present invention can be widely applied.

Description of drawings

FIG. 1 is a view of a golf club head according to a first embodiment viewed from the club face side.

FIG. 2(A) is a front view of a bush, and FIG. 2(B) is a sectional view of a hammer unit in which a screw member and a weight-increasing member are integrated.

FIG. 3 is an exploded perspective view of FIG. 1 .

Fig. 4 is a view of the golf club head according to the second embodiment viewed from the club face side.

Fig. 5 is a view of the golf club head viewed from the sole side of the head.

FIG. 6(A) is a plan view of the first hammer part, FIG. 6(B) is a front view of the first hammer part, and FIG. 6(C) is a bottom view of the first hammer part.

FIG. 7(A) is a plan view of the first hammer part, FIG. 7(B) is a front view of the first hammer part, and FIG. 7(C) is a bottom view of the first hammer part.

detailed description

Hereinafter, a first embodiment of the present invention applied to a golf club head called a driver will be described with reference to the drawings.

As shown in FIG. 1 , the golf club head 10 of the present embodiment is hollow and includes a head top surface 11 , a head side surface 12 , a head sole surface 13 , and a club face 14 . On the inside of the head top surface 11 from the heel portion 15 side toward the head bottom surface 13 , a cylindrical hosel portion 16 is integrally provided, and one end side (tip side) of the shaft S is accommodated and connected to the shaft via a bush 17 . Inside the neck 16.

As shown in FIG. 2(A), the bushing 17 is configured to include: a bottomed main body cylinder 20; a socket portion 21 having a stepped portion 21A located on the upper end side of the main body cylinder 20 in the drawing. Abutting against the upper end of the hosel portion 16; a thin tube portion 22 as a front end side in the insertion direction, which is connected to the lower end side of the main body tube 20, and has an internal thread 23 formed therein. In addition, in a state where the bushing 17 is inserted into the hosel 16 , the central axis of the hosel 16 coincides with the central axis of the internal thread 23 . The front end side of the shaft S is inserted into the main body tube 20 , and the shaft S is fixed to the bush 17 via an adhesive. The thin cylindrical portion 22 has a diameter such that it can be inserted into a through hole 16B (see FIG. 3 ) formed in the bottom portion 16A of the hosel portion 16 . In addition, the thin tube portion 22 is provided in connection with the main body tube 20 via a stepped portion 24 which abuts against a bottom portion 16A forming the bottom portion of the hosel portion 16 . In addition, the weight of the bushing 17 is not particularly limited, but in this embodiment, a bushing of 5.7 g is used.

A concave portion 13A is formed on the heel portion 15 side in the region of the head sole surface 13 of the head 10 . The recessed portion 13A is formed in a substantially circular opening shape, and its central axis is set to be located substantially on the same axis as the central axes of the hosel 16 and the shaft S. As shown in FIG. The screw member 25 inserted into the concave portion 13A is provided so as to be screwable into the internal thread 23 formed in the thin tube portion 22 of the bush 17 , whereby the shaft S is connected to the head 10 via the bush 17 .

A counterweight WT is detachably provided on the screw member 25 around its axial direction. The weight WT is formed substantially in a cylindrical shape, and a shaft portion of a screw member 25 can be inserted into a through hole (through hole) 27 formed in the center thereof. In addition, the weight WT is composed of a cylindrical large-diameter portion and a cylindrical small-diameter portion, and a tapered portion is formed between the large-diameter portion and the small-diameter portion. The tapered portion is formed by gradually reducing the outer diameter from the large diameter portion to the small diameter portion, and the outer surface of the tapered portion is defined as a tapered surface 28 . The tapered surface 28 is formed around the outer surface of the tapered portion of the cylindrical weight WT. An O-ring 26 is attached to the middle of the screw member 25, and the weight WT is integrated between the O-ring 26 and the head of the screw member 25 in a state where it cannot fall off. 17. When connecting the shaft S to the head 10, the weight WT must be positioned on the axis of the shaft S. Further, when the hammer member W is fixed to the head 10 with the screw member 25, the tapered surface 28 of the weight WT contacts a step formed on the inner surface of the head 10 forming the concave portion 13A. That is, the hammer member W is screwed in by the screw member 25 until the tapered surface 28 comes into contact with the step of the club head 10. By making the tapered surface 28 contact the step, the central axis of the weight WT of the hammer member W is brought into contact with the shaft S. the same central axis. Further, the step of the head 10 is formed one turn on the inner surface of the head 10 forming the concave portion 13A corresponding to the tapered surface 28 formed one turn around the weight WT. Here, the hammer member W is composed of the screw member 25 , the weight WT, and the O-ring 26 . In addition, the hammer member W is not particularly limited, but in the present embodiment, it is selected from a plurality of hammer members W with different weights. More specifically, in the present embodiment, the hammer member W is set such that, in the state including the O-ring 26 and the screw member 25, 8.5g, 10g, 10g, and Choose from 11.5g, 13g, 14.5g, 16g, 17.5g, 19g, 20.5g, 22g. Accordingly, the weight of the hammer member W can be set to be heavier than that of the bush. In addition, the upper limit of the hammer member W is not limited to 22 g, as long as it is below the weight that a general golfer can sufficiently swing a golf club.

As shown in FIG. 1 , in the golf club of this embodiment, the weight WT is arranged around the axial direction of the screw member 25, and the weight WT is integrally integrated with the O-ring 26 so as not to fall off to constitute the hammer member W. Inside the recessed portion 13A of the head 10 , and the shaft S is fixed by screwing a screw member 25 into the internal thread 23 of the bush 17 . Screwing in the screw member 25 functions to introduce the bush 17 into the hosel 16 , and the bush 17 can be firmly fixed in the hosel 16 . In addition, since the hammer member W is fixed to the head 10 in a state where the tapered surface 28 is in contact with the step of the head 10 , loosening of the screw member 25 can be avoided.

For example, the shape of the hammer W in the above-described embodiment is not limited to the illustrated example, and hammers having various shapes and structures can be used as long as they are detachably provided on the axis of the shaft.

In addition, the target club of the present invention is not limited to a driver, but can also be applied to fairway woods and multi-purpose clubs. In addition, it may be applied to iron golf clubs.

Furthermore, the corresponding shapes of the hosel 16 and the bushing 17 are not limited to the illustrated structural examples, and the bushing 17 is provided at a predetermined position on the hosel 16 and is inserted into the head bottom side by screwing the screw member 25 . A fixed structure is sufficient.

In short, the present invention can be applied to a golf club having a structure in which the shaft is fixed to the hosel via the bush.

Next, a second embodiment of the present invention will be described. In addition, the same code|symbol is attached|subjected to the same structure as 1st Embodiment, and description is abbreviate|omitted.

The center-of-gravity position of the golf club head including the center-of-gravity depth, center-of-gravity height, and center-of-gravity distance is an element that determines the fly distance, ballistic height, direction, and the like when hitting a golf ball.

Here, "center of gravity depth" is generally used to refer to the distance between the center of gravity of the club head and the leading edge, "center of gravity height" is generally used to refer to the distance between the sweet spot and the leading edge, and "center of gravity distance" is generally used to refer to , connecting the distance between the intersection point of a straight line passing through the center of gravity and perpendicular to the axis of the shaft and the axis of the shaft and the position of the center of gravity. The depth of the center of gravity is an element that determines the moment of inertia, and the height of the center of gravity is considered to be an element that affects the height of the trajectory (shooting angle). Also, depending on whether the center of gravity is closer to the toe or the heel, the difficulty of returning the club head differs, and the distance from the center of gravity is an element that affects the flying direction of the ball.

The second embodiment is a golf club head capable of adjusting the center-of-gravity distance without changing the center-of-gravity depth and center-of-gravity height using the hammer member W used in the first embodiment.

In FIG. 4 , in the region of the sole surface 13 of the golf club head 10 , recessed portions 13A, 13B are formed on the heel portion 15 side and the toe portion 19 side. The first hammer member WA and the second hammer member WB. Here, the recessed portion 13A is located on the axis of the hosel portion 16 , and the first weight member WA is located on the central axis of the shaft S when the first weight member WA is disposed in the recessed portion 13A. In addition, the second recessed portion 13B is provided on an axis parallel to the recessed portion 13A, and, on the top side thereof, a threaded cylinder 18 for screwing and fixing the second hammer member WB is formed.

The first hammer member WA and the second hammer member WB are not particularly limited, and are selected from a plurality of hammer members with different weights in the present embodiment. In the state where the golf club head 10 is facing the face angle of the target, these hammer parts WA, WB are at a predetermined height H (refer to FIG. 4 ) with respect to the sole contact surface S (see FIG. 5 ), and As shown, they are respectively detachably provided on the straight line L2 parallel to the straight line L1 tangent to the club face 14, that is, in the same plane parallel to the club face. In short, the first weight member WA and the second weight member WB are arranged at the same height position on the heel portion 15 side and the toe portion 19 side in the head sole 13 . Here, the arrangement of the first weight member WA and the second weight member WB at the same height position means that the respective centers of gravity of the first weight member WA and the second weight member WB are located at substantially the same height position. In addition, that the first weight member WA and the second weight member WB are provided in the same plane means that the respective centers of gravity of the first weight member WA and the second weight member WB are substantially located on the straight line L2. Moreover, the arrangement of the first weight member WA and the second weight member WB on the heel portion 15 side and the toe portion 19 side, respectively, means that, as shown in FIG. The position of the center of gravity P is closer to the root 15 , and the second weight member WB is arranged closer to the tip 19 than the position of the center of gravity P of the head when viewed from the tip 19 .

As shown in FIGS. 6 and 7 , the first hammer member WA and the second hammer member WB respectively include the same screw member 25 . The first weight member WA is composed of a screw member 25 and a first weight WT1 capable of passing through the screw member 25 , and the second weight member WB is composed of a screw member 25 and a first counterweight WT1 capable of passing through the screw member 25 . Two counterweights WT2 form. In the present embodiment, the first weight WT1 is formed of tungsten and the weight of the first weight member WA is 23 g, and the second weight WT2 is formed of aluminum and the weight of the second weight member WB is set to 3 g. The screw members 25 are screw members having the same weight, but by using the first weight WT1 and the second weight WT2 of different weights, it is possible to prepare a plurality of hammer members with different weights. More specifically, the first counterweight WT1 is configured to be interchangeable among a plurality of counterweights having different weights, and one of the plurality of first counterweights, that is, the counterweight WT1A1 (not shown) is the same as the counterweight WT1A1 (not shown) among the plurality of counterweights. The weight of the other counterweight WT1A2 (not shown) is different, but they are all formed in such a shape that the screw member 25 can pass inside and can be inserted into the recess 13A. The counterweight WT1A2 is about the same. In this case, for example, by making the materials of the counterweight WT1A1 and the counterweight WT1A2 different, it is possible to form weight-increasing members having different weights. In addition, it is also possible to make the outer shape of the weight WT1A1 different from that of the weight WT1A2, as long as only the distance of the center of gravity can be changed and the depth of the center of gravity of the club head can be changed in the case of changing the weight WT1A1 to the weight WT1A2. and the height of the center of gravity may be substantially unchanged.

The screw member 25 is composed of a screw 30 provided with an external thread 30A on the outer periphery of the front end, and a head 31 located on one end side of the screw 30 . In addition, as shown in FIG. 6(B), the first weight WT1 is formed in a cylindrical shape, the length of which is about half the length of the screw member 25, and the head 31 is located by the small inner diameter portion in a relatively rotatable state. 35A and the large inner diameter portion 35B in the large inner diameter portion 35B of the through hole 35. In addition, a C-shaped ring 36 for detachment prevention is fixed around the screw rod 30 .

In addition, the second weight WT2 differs from the first weight WT1 only in the outer peripheral contour, and is substantially the same as the first weight WT1, and has a through hole 35 composed of a small inner diameter portion 35A and a large inner diameter portion 35B, and the screw member 25 The head portion 31 is located in the large inner diameter portion 35B. In addition, a C-ring 36 is also fixed to the screw 30 of the second weight member WB.

As shown in FIG. 4 , in the golf club head 10 of the present embodiment, the first weight member WA and the second weight member WB are disposed in the recesses 13A, 13B, respectively, and the external thread 30A of the first weight member WA is screwed into the recesses 13A and 13B. In the internal thread portion 23 at the bottom of the bush 17, on the other hand, the external thread 30A of the second weight member WB is screwed into the threaded cylinder 18 of the recessed portion 13B, thereby fixing it. The aforementioned screwing of the first hammer member WA functions to introduce the bush 17 into the hosel 16 , and can securely fix the bush 17 fixing the shaft S to the hosel 16 .

Next, a case where the center-of-gravity distance GL (see FIG. 4 ) of the present embodiment is changed will be described.

First, the first weight member WA and the second weight member WB are located on the same plane on the straight line L at the same height H and on the straight line L2 parallel to the straight line L1 tangent to the club face 14. When WA is set to 23g and the second hammer part WB is set to 3g, the center of gravity of the club head is at point P in Fig. 4 .

Here, for example, by replacing the first weight member WA or the second weight member WB and increasing the weight difference between the first weight member WA and the second weight member WB, the center of gravity position P can be displaced (moved) toward the heel portion 15 side. ). On the other hand, by making the weight difference between the first weight member WA and the second weight member WB smaller than the initial weight difference, the center of gravity position P can be displaced toward the tip portion 19 side.

Therefore, by displacing the position of the center of gravity toward the heel 15 or the toe 19 , the magnitude of the center of gravity distance GL changes, thereby changing the return of the head, that is, the return of the toe 19 with the shaft S as the center of rotation. Degree of difficulty. Thus, for example, in the case of a golfer who has a disadvantage that the return of the toe 19 tends to be slow, the disadvantage can be easily overcome by making the second hammer member WB relatively lighter than the initial setting.

In addition, when the total weight of the first hammer member WA and the second hammer member WB is heavier than the initial weight, the mass of the club head as a whole also increases, so as long as the club head speed can be maintained at the same level, it also contributes to prolonging the flying time. ball distance. In addition, in the above description, the first weight member WA and the second weight member WB are arranged on the straight line L at the same height, but this is not limited to the fact that the first weight member WA and the second weight member WB are arranged on the same height. Therefore, it is not excluded that the first hammer member WA and the second hammer member WB are arranged at substantially the same height. For example, when changing the first counterweight WT1 of the first weight member WA to another counterweight (different weight), the position of the center of gravity of the first weight member WA can be changed before and after the change. The purpose of this embodiment is to change the center-of-gravity distance GL by shifting the center-of-gravity position P while the center-of-gravity depth and the center-of-gravity height remain substantially unchanged (as much as possible). Therefore, the present invention can be applied to the case where the first weight member WA and the second weight member WB are arranged at substantially the same height H and the first weight member WA and the second hammer member WB are arranged at substantially the same level parallel to the club face. In-plane golf club head.

The above description discloses the optimum structure, method, and the like for carrying out the present invention, but the present invention is not limited thereto.

That is, the present invention has been particularly illustrated and described with respect to specific embodiments, but those skilled in the art can make various modifications to the above-described embodiments without departing from the technical idea and purpose of the present invention.

For example, the external appearance shapes of the first weight member WA and the second weight member WB in the above-mentioned embodiment are not limited to the illustrated structural examples, and hammer members having various shapes and structures can be adopted, as long as they are detachably installed in predetermined positions. part. In addition, materials other than tungsten and aluminum may be used as the material of the weight-increasing member.

In addition, the target club of the present invention is not limited to a driver, but can also be applied to fairway woods and multi-purpose clubs. In addition, it may be applied to iron golf clubs.

In short, various design changes are possible in the present invention, as long as only the center-of-gravity distance is changed.

Claims (7)

1. A golf club, characterized in that it has: Club head; a shaft connected via a bush capable of being inserted into a hosel formed on the heel side of the head; a screw member having a head and a threaded shaft portion, the screw member joining the bushing to the bottom of the hosel; The club head has a recess on the sole of the club head located on the central axis of the hosel portion, In the shaft, a weighting member and the screw member are integrated to form a hammer member, and the hammer member penetrates the bottom portion of the hosel portion from the concave portion toward the front end in the inserting direction of the bushing, and threadedly engaged with the front end of the bushing in the insertion direction, The weight-increasing member has a cylindrical shape and has a through hole through which the screw member passes, At least the weight-increasing member among the hammer members is in contact with the bottom portion by screwing the screw member penetrating through the through hole and the front end portion of the bush in the insertion direction. , fixed on the bottom side more than the bottom, The hammer member is integrated by providing an O-ring on the shaft portion of the screw member to prevent the weight-increasing member from falling off the screw member, When the screw member connects the shaft and the head via the bush, the central axis of the weighted member coincides with the central axis of the shaft. 2. The golf club of claim 1, wherein: The bush has an internal thread portion formed at a front end portion in the insertion direction, The central axis of the internally threaded portion coincides with the central axis of the hosel. 3. The golf club of claim 1, wherein: A central axis of the concave portion of the head coincides with a central axis of the hosel. 4. A golf club according to any one of claims 1 to 3, wherein: The weight of the hammer part is heavier than the weight of the bushing. 5. A golf club according to any one of claims 1 to 3, wherein: The weighting part is interchangeable between a plurality of weighting parts of different weights. 6. A golf club according to any one of claims 1 to 3, wherein: The golf club has: a first hammer member that is detachable and disposed at a position on the heel side as the hammer member; a second hammer member that is detachable and disposed at a position on the tip side of the club head; The first hammer member and the second hammer member are arranged at a predetermined height relative to the sole contact surface and are respectively arranged parallel to the club face when the club head is facing the target face angle. within the same plane. 7. The golf club of claim 6, wherein: At least one of the first hammer member and the second hammer member is configured to be interchangeable among a plurality of hammer members having different weights.