JP3148909U - Golf club head and golf club having the same - Google Patents

Abstract

[PROBLEMS] To easily apply a backspin (reverse rotation) or topspin to a ball by optimally adjusting the balance of the center of gravity in the vertical direction as well as the longitudinal and lateral directions of the head according to the individuality of the player. It is possible to provide a golf club head that can be easily controlled and has excellent versatility and handleability. A cover portion includes a balancer receiving recess that surrounds the outer periphery of the balancer, and a balancer receiving recess that is formed on the crown side and the sole side of the head body, and includes one or more center-of-gravity height adjustment balancers. And a pair of upper and lower center-of-gravity height adjustment units to be accommodated. [Selection] Figure 4

Description

  The present invention relates to a golf club head and a golf club provided with the same.

Conventional golf club heads are aimed at extending the distance and aiming at a direction in which the head is easy to run, that is, an acceleration direction, and an acceleration design in which the sole is easy to slide has become mainstream.
Therefore, although there was something with an uneven part on the sole with an emphasis on design, the thrown ball was intentionally decelerated to reduce the flight distance and rolling amount, or actively The shape for applying spin (reverse rotation) has not been studied except for the adjustment of the loft angle.
Therefore, the applicant of the present application filed (Patent Document 1) as a result of intensive research.
(Patent Document 1) states that “the sole of the head body has a flat portion and a concavo-convex portion having a plurality of ridges or grooves that intersect each other, and a weight is provided on the back face surface side of the head body. And / or a golf club head including a balance adjusting portion in which a spacer is detachably disposed.
WO2008 / 087762

The golf club head disclosed in Patent Document 1 is different from the conventional golf club head in which the adjustment of the loft angle is emphasized, and by considering the depth of the concavo-convex portion and the balance (center of gravity position) of the front, rear, left and right weights, Even if the ball is shaken strongly, the brake is applied naturally, the ball is likely to be spun, the control is easy to apply, and the usability is excellent.
However, since the depth of the concavo-convex part is set at the time of manufacture, it is difficult to adjust the position of the center of gravity in the height direction after purchase. With the balance adjustment part on the toe side and heel side alone, the weight and spacer Even if the specific gravity and arrangement are combined, the center of gravity position can be adjusted only in the front-rear direction and the left-right direction of the face surface, the flexibility of center of gravity adjustment that can be finely adjusted in a wide range from several grams to several hundred grams, Development of a golf club head with excellent versatility has been desired.
In addition, when using a golf club head that does not include a balance adjustment unit such as (Patent Document 1) or a user who cannot perform sufficient balance adjustment with the golf club head of (Patent Document 1), after purchasing a golf club, The center of gravity was sometimes adjusted by attaching a weight such as lead to the golf club head according to the user's preference or habit, but from the viewpoint of environmental protection, the user needs to adjust the center of gravity. Thus, it has been desired to develop a golf club head excellent in environmental protection capable of easily fine-tuning the center of gravity without using lead or the like.

  The present invention solves the above-mentioned problems. By adjusting the balance of the center of gravity not only in the front / rear direction and left / right direction of the head but also in the vertical direction according to the individuality of the player, the backspin (reverse rotation) can be easily performed on the ball. ) And top spin, providing a golf club head that is easy to apply control to the ball, has excellent versatility and handleability, and is capable of fine adjustment in a wide range and excellent center of gravity adjustment. A golf club with excellent functionality and usability that can easily adjust the flying distance, speed, rotation, rolling, etc. of the ball according to the distance to the cup, the type of grass on the green, the state, etc. The purpose is to provide.

In order to solve the above problems, a golf club head of the present invention and a golf club provided with the head have the following configurations.
The golf club head according to claim 1 of the present invention has a cover portion that detachably accommodates one or more balancers and is detachably covered on the toe side and the heel side of the back face side of the head body. A golf club head having a pair of left and right balance adjusting portions provided, wherein the cover portion is partitioned by a balancer accommodating recess that surrounds the outer periphery of the balancer, and the balancer accommodating recess. The crown side and the sole side of the head body And a pair of upper and lower center-of-gravity height adjustment units that accommodate one or more center-of-gravity height adjustment balancers.
This configuration has the following effects.
(1) The balance adjuster cover that is detachably covered on the head body has a balancer-receiving recess that surrounds the outer periphery of the balancer, thus protecting the balancer from wind and rain and external forces to prevent damage or loss. Can be used and has excellent usability.
(2) Since the cover portion has a pair of upper and lower center of gravity height adjustment portions which are formed on the crown side and the sole side of the head body and accommodate one or more center of gravity height adjustment balancers, the cover portion is accommodated in the balancer accommodation recess. The balancer can adjust the center of gravity in the vertical direction as well as in the front and rear and left and right directions of the head, and can set the optimal center of gravity balance according to the user's habits and preferences. Excellent flexibility and versatility.
(3) Since the balancer accommodating recess and the pair of upper and lower center of gravity height adjusting portions are partitioned, the balancer accommodated in the balancer accommodating recess and the center of gravity height adjusting balancer accommodated in the center of gravity height adjusting portion interfere with each other. There is no, and it is excellent in usability.
(4) Select the number of balancers housed in the balancer housing recess and the center of gravity height adjustment balancer housed in the center of gravity height adjustment section, the specific gravity (weight) of each balancer and center of gravity height adjustment balancer, and the combination of arrangements Therefore, regardless of the shape of the head body, it is possible to easily adjust the center of gravity of the head body in a wide range and select the optimal position according to the user's habits and preferences, etc. Excellent versatility.
(5) When the balancer or the center of gravity height adjustment balancer makes the center of gravity of the entire head heavier on the face side or sole side, the face surface will easily hit the ball core (position lower than the center of gravity on the equator). The backspin rotation of the ball can be increased, the ball can be easily controlled, and it has excellent usability as a club head for a short club or for putting in a short distance or fast green.
(6) When the balancer or the center-of-gravity height adjustment balancer is used so that the center of gravity of the entire head becomes heavy on the crown side or back face surface, the face surface hits the ball core (near the center of gravity on the equator) or slightly higher than the core. This makes it easier to reduce the loss during impact and increase the flight distance.

Here, the position of the basic center of gravity of the golf club head is determined by the shape and dimensions of the head body, but it depends on the flight distance required for the golf club, the wind and green conditions, or the user's habits and preferences, etc. The balancer can be easily adjusted by the combination of the material, the number, and the arrangement of the balancer and the center-of-gravity height adjustment balancer accommodated in the balancer-accommodating recess and the center-of-gravity height adjustment unit.
Therefore, the specific gravity (material) and weight of each balancer and the center-of-gravity height adjustment balancer can be selected as appropriate, and need not be the same.
In addition to balancers and center-of-gravity height adjustment balancers that are mainly composed of metals with high specific gravity such as tungsten, brass, iron, copper, and gold, and metals with low specific gravity such as magnesium, aluminum, and titanium, metal It is possible to use a combination of materials made of a synthetic resin such as ABS resin or PC resin having a smaller specific gravity (light weight) or a synthetic rubber.

A balancer that is detachably fixed to the head body by screwing with a screw or the like is preferably used. In addition, the center-of-gravity height adjustment balancer can be accommodated in a part of the internal structure of the cover portion that protects the balancer.
When a magnetic force is applied to the balancer and center of gravity height adjustment balancer, multiple balancers and center of gravity height adjustment balancers can be handled as a single unit, making it easy to adjust the center of gravity and suppressing subtle vibrations. It becomes possible and is excellent in usability. In addition, it is not necessary to give all the balancers and the center of gravity height adjustment balancer a magnetic force, so that only a part of the balancer has a magnetic force and can be used in combination with a balancer that does not have a magnetic force or a center of gravity height adjustment balancer. Good. The center-of-gravity height adjustment balancer may be merely fitted to the center-of-gravity height adjustment unit, but may be fixed by filling with an adhesive after the position of the center of gravity is determined.
The total weight of the balancer can be selected as appropriate, but is preferably adjustable at a ratio of 0.5% to 50% with respect to the total weight of the golf club head. As the ratio of the total weight of the balancer to the total weight of the golf club head is less than 0.5%, the balance adjustment effect tends to be insufficient, and as the ratio exceeds 50%, the weight of the head body alone is increased. Is too light, the head speed when the balancer is not added tends to be high, and the braking effect tends to decrease, which is not preferable.
However, by forming the head body from a lightweight material such as a synthetic resin, the adjustment range of the balancer can be expanded up to about 80%.

The invention according to claim 2 is the golf club head according to claim 1, wherein the balance adjusting portion is formed at a toe side on the back face surface side and a corner on the heel side of the head body. A notch, a main female screw formed on an end surface of the notch on the back face surface side, an insertion shaft inserted through an insertion hole formed in a central portion of the balancer, and the insertion shaft. A male screw portion formed at one end and screwed into the main female screw portion of the notch, and a head having an outer shape larger than the insertion hole of the balancer and disposed at the other end of the insertion shaft And a balancer fixture having a head female screw portion formed on the head, and the cover portion communicates with the balancer-accommodating recess from the back face surface side of the cover portion. A through hole that is inserted through the through hole and the bar Has a cover fixing screw which is screwed into the head female screw portion of the Nsa fixture, the structure comprises a.
With this configuration, in addition to the operation of the first aspect, the following operation is provided.
(1) A main body female in which a balance adjusting portion is formed on a notch portion formed on a toe side and a heel side corner on the back face surface side of the head body, and on an end surface on the back face surface side of the notch portion. Since the screw portion is provided, the balancer fixture can be easily attached and detached, the balancer can be easily replaced, and the maintainability is excellent.
(2) A male screw part to be screwed into the female screw part of the notch is formed at one end of the insertion shaft of the balancer fixture, and a head having an outer shape larger than the insertion hole of the balancer is formed at the other end. By simply inserting the insertion shaft into the insertion hole of the balancer and screwing the male screw part into the female screw part of the main body, the balancer is provided between the end face on the back face surface side of the notch part and the head part. Can be held so that the balancer is fixed stably.
(3) The head female screw portion is formed on the head of the balancer fixture, and the cover portion is provided with a through hole communicating with the balancer receiving recess from the back face surface side. The cover part can be easily and firmly fixed to the head body simply by being inserted through the through-hole of the cover part and screwed into the female screw part of the head of the balancer fixture, and is excellent in disassembly and assembly workability. .
(4) The insertion shaft of the balancer fixture is screwed into the female female threaded portion formed on the end face of the notch on the back face surface side, so that the head surface from the face surface side to the back face surface side. Since it is arranged substantially horizontally, the position of the center of gravity can be adjusted in the front-rear direction between the face surface side and the back face surface side by a combination of the number of balancers, specific gravity, and arrangement, which is excellent in usability.

Here, the outer shape of the balancer is formed in a circular shape, a rectangular shape, a polygonal shape, or a combination thereof, and an insertion hole for inserting the insertion shaft through the central portion is formed.
The balance adjustment part adjusts the balance of the center of gravity with a balancer, so the cover part is preferably made of a lightweight material, but engineering resin such as polycarbonate with excellent mechanical strength is suitable to prevent damage due to external force etc. Used for. In addition, when a light metal material such as magnesium is used, it has a high-class feeling and excellent uniformity with the head body. Also, to prevent the cover part from hitting the ground and damaging it during the swing, the end part on the back face side of the cover part is shorter than the back face surface of the head body, or the corner on the sole side of the cover part is chamfered. Also good.
For use in cases where the temperature difference is severe, such as extremely high temperatures or below zero, the balancer may be fixed by filling the balancer housing recess with resin or the like, if necessary. This is because the balancer can be fixed securely and has excellent fixing stability.

The invention described in claim 3 is the golf club head according to claim 1 or 2, wherein the balancer and the center-of-gravity height adjustment balancer are any one of metals, synthetic resins, and synthetic rubbers having different specific gravities. The configuration is a combination of the above.
With this configuration, in addition to the operation of the first or second aspect, the following operation is provided.
(1) As a balancer and a center-of-gravity height adjustment balancer, by combining one or more of metals, synthetic resins, and synthetic rubbers with different specific gravities, the center of gravity position in the vertical direction in addition to the longitudinal and lateral directions of the head body Can be easily adjusted, and can respond finely to the user's habits and preferences, etc., and is excellent in the flexibility and versatility of adjusting the center of gravity.
Here, when considering prevention of vibration of the balancer and the center-of-gravity height adjustment balancer, it is preferable to form the balancer with a light metal.

According to a fourth aspect of the present invention, there is provided the golf club head according to any one of the first to third aspects, wherein the golf club head is formed at a center portion between at least a toe side and a heel side of the sole of the head body. It has the structure provided with the recessed part.
With this configuration, in addition to the operation of any one of claims 1 to 3, the following operation is provided.
(1) The width of the center of gravity position adjustment by the balancer and the center-of-gravity height adjustment balancer by reducing the weight of the head body by having a recess formed in at least the center part between the toe side and the heel side of the sole of the head body. The center of gravity can be adjusted and the versatility of the center of gravity is excellent.
(2) By forming a recess in the sole of the head body, the center of gravity of the head body is raised, and the face hits a position slightly higher than the center of gravity (equatorial position) of the ball, so that the top spin spins the ball at high speed. It becomes easy, the speed is accelerated, and the effect that the ball stretches well can be expected, and it can be suitably used for long or middle distance putting.
(3) When the center of gravity can be adjusted freely by combining a balancer or a center of gravity height adjustment balancer with a head body that has a recess in the sole and has previously raised the position of the center of gravity. The face hits a position slightly lower than the center of gravity (equatorial position) of the ball, and the ball is slightly braked by backspin to reduce the speed. It can be used suitably.

Here, the depth of the concave portion can be selected in accordance with the type and count of the golf club, or the user's preference, wrinkles, etc., but 0.5 mm to 8 mm, preferably 2 mm to 6 mm is desirable. As the depth of the recess becomes shallower than 2 mm, the center of gravity of the head body becomes lower, the ball is more likely to be braked by backspin, and it tends to be difficult to accommodate long or middle distance putting, 6 mm As it becomes larger, the position of the center of gravity of the head main body becomes higher, the speed of the ball is easily accelerated by top spin, the controllability is lowered, and there is a tendency that it is difficult to cope with short putting. If it is smaller than 0.5 mm, the center of gravity of the head body becomes too low, and it becomes difficult to adjust the center of gravity by the center of gravity height adjustment balancer. If it exceeds 8 mm, the center of gravity of the head body becomes too high. Therefore, it becomes difficult to adjust the center of gravity height by the center of gravity height adjustment balancer, which is not preferable.
By setting the depth of the recess to 2mm to 6mm, the center of gravity height can be adjusted by combining the center of gravity height adjustment balancer with the head body whose position of the center of gravity has been raised in advance. It can be used, and it has excellent flexibility and versatility in adjusting the center of gravity.

The invention according to claim 5 is the golf club head according to claim 4, wherein the concave portion is formed by carving from the back face surface side so that the face surface side of the head body is deep. It has the structure provided with.
With this configuration, in addition to the operation of the fourth aspect, the following operation is provided.
(1) Since the concave portion has an inclined portion formed by carving from the back face surface side so that the face surface side of the head main body is deep, the turf can easily come out of the concave portion during swing, and the head can be shaken out smoothly. Can be used and has excellent usability.
Here, the inclined portion may be formed in the entire recess, or may be partially formed on the back face surface side of the recess.

The invention according to claim 6 is the golf club head according to any one of claims 1 to 5, wherein the shape of the sole of the head body is bounce sole, scoop sole, flat sole, round sole. It has the structure formed by any one or combination of two.
With this configuration, in addition to the operation of any one of claims 1 to 5, the following operation is provided.
(1) Since the shape of the sole of the head main body is formed by any one or a combination of a bounce sole, a scoop sole, a flat sole, and a round sole, the type of golf club, the count, or the user It can be adapted to the tastes and tastes of the machine, and has excellent versatility.
(2) When the shape of the sole has a bounce sole shape with a low face surface on which the ball hits and a high back face surface side, it is not easily affected by the lawn, and not only a sense of distance but also an accurate directionality is obtained. Excellent handleability. In particular, when used as a club head of a putter for short putting, a deceleration (braking) effect can be obtained, and as a result, the probability of cup-in can be improved for putting within 2 to 3 m.

Here, the bounce angle is preferably 1 degree to 3 degrees. As the bounce angle becomes smaller than 1 degree, the ball tends to turn right (easier to slice), and as the bounce angle becomes larger than 3 degrees, the ball tends to turn left (easy to hook). However, neither is preferable.
Further, the range in which the shape of the bounce sole is formed can be appropriately selected depending on the loft angle, the type and count of the golf club, or the preference of the golfer. By forming the bounce sole at an appropriate ratio, a smooth stroke is possible.

A seventh aspect of the present invention is the golf club head according to any one of the first to sixth aspects, wherein the golf club head has one of wood, iron, and putter.
With this configuration, in addition to the operation of the first or second aspect, the following operation is provided.
(1) Adjust the balance of the center of gravity of the head three-dimensionally with a balancer or a center of gravity adjustment balancer, and select the optimal center of gravity balance according to the individuality of the player. The backspin (reverse rotation) and topspin can be applied to the ball, it is easy to control the ball, and it can be used for a wide range of distances from putting and short clubs to long clubs. Excellent versatility and usability.
(2) When a golf club head for a putter is used, it can be used for a long putting to a short putting by combining with a center of gravity height adjustment balancer. If the position of the center of gravity is increased, the ball will be stretched well and can be suitably used for putting long or middle distances. If the position of the center of gravity is decreased, the distance is short or fast in the green or around the green (color or edge). It can be suitably used for putting, and can easily adjust the directionality and the sense of distance, is hardly affected by the lawn, and has excellent usability.
(3) When a golf club head for wood or iron is used, the backspin (reverse rotation) or topspin can be easily applied to the ball by optimally adjusting the center of gravity balance with a balancer or center of gravity height adjustment balancer. This makes it easy for beginners to control the ball and provides excellent usability.

A golf club according to an eighth aspect of the present invention has a configuration including the golf club head according to any one of the first to seventh aspects.
This configuration has the following effects.
(1) The distance, speed, rotation, rolling, etc. of the ball can be easily adjusted according to the distance to the cup, the type of grass on the green, and the state. It can be used in a wide range from putter clubs to long clubs and iron clubs, and has excellent functionality and usability.

As described above, according to the golf club head of the present invention and the golf club having the same, the following advantageous effects can be obtained.
The device according to claim 1 has the following effects.
(1) In addition to the adjustment of the center of gravity in the longitudinal and lateral directions of the head by the balancer housed in the balancer housing recess, the center of gravity in the vertical direction is adjusted by the center of gravity height adjustment balancer housed in the center of gravity height adjustment section. Therefore, it is possible to provide a golf club head excellent in versatility and versatility of adjusting the center of gravity, which can finely set an optimal center of gravity balance according to the user's habits and preferences in a wide range.

According to the invention described in claim 2, in addition to the effect of claim 1, the following effect is obtained.
(1) The head female screw portion is formed on the head of the balancer fixture, and the cover portion is provided with a through hole communicating with the balancer receiving recess from the back face surface side. Disassembly and assembly workability and space saving that can be easily and firmly fixed to the head body simply by being inserted through the through-hole of the cover part and screwed onto the female screw part of the head of the balancer fixture. A golf club head having excellent properties can be provided.

According to the invention described in claim 3, in addition to the effect of claim 1 or 2, the following effect is obtained.
(1) As a balancer and a balance height adjustment balancer, in combination with the number and arrangement of one or more of metals, synthetic resins and synthetic rubbers with different specific gravity, The position of the center of gravity in the direction can be easily adjusted, and it is possible to finely cope with the user's habits, preferences, etc., and to provide a golf club head excellent in flexibility and versatility of center of gravity adjustment.

According to the invention described in claim 4, in addition to the effect of any one of claims 1 to 3, the following effect is obtained.
(1) By forming a recess in the center part between the toe side and the heel side of the sole of the head body, the weight of the head body can be reduced, and the center of gravity by combining with a balancer and a center of gravity height adjustment balancer It is possible to provide a golf club head excellent in versatility and versatility of center of gravity adjustment that can widen the position adjustment range.

According to the invention described in claim 5, in addition to the effect of claim 4, the following effect is obtained.
(1) The concave portion formed in the sole of the head body has an inclined portion formed by carving from the back face surface side so that the face surface side of the head main body is deep, so that the turf can easily come out of the concave portion during a swing. It is possible to provide a golf club head excellent in usability that can swing the head smoothly.

According to the invention described in claim 6, in addition to the effect of any one of claims 1 to 5, the following effect is obtained.
(1) Since the shape of the sole of the head main body is formed by any one or a combination of a bounce sole, a scoop sole, a flat sole, and a round sole, the type of golf club, the count, or the user Therefore, it is possible to provide a golf club head excellent in versatility that can cope with the taste and habit of the user.

According to the invention described in claim 7, in addition to the effect of any one of claims 1 to 6, the following effect is obtained.
(1) Adjust the balance of the center of gravity of the head three-dimensionally with a balancer or a center of gravity adjustment balancer, and select the optimal center of gravity balance according to the individuality of the player. The backspin (reverse rotation) and topspin can be applied to the ball, it is easy to control the ball, and it can be used for a wide range of distances from putting and short clubs to long clubs. A golf club head excellent in versatility and usability can be provided.

The invention according to claim 8 has the following effects.
(1) The distance, speed, rotation, rolling, etc. of the ball can be easily adjusted according to the distance to the cup, the type of grass on the green, and the state. It is possible to provide a golf club with excellent functionality and usability that can be applied widely from a putter club to a long club and an iron club.

(Embodiment 1)
A golf club head used for the golf club according to the first embodiment of the present invention will be described below with reference to the drawings.
1 is a perspective view of the top surface side of the golf club head used in the golf club of the first embodiment, and FIG. 2 is a perspective view of the bottom surface side of the golf club head used in the golf club of the first embodiment. FIG. 3 is a plan view of a golf club head used for the golf club of the first embodiment.
In FIG. 1, 1 is a golf club head for a putter used in the golf club of Embodiment 1, 2 is a head body of the golf club head 1, 2a is a face surface of the golf club head 1, and 2b is a back of the golf club head 1. The face surface, 2c is a shaft insertion hole formed on the crown 2d side of the golf club head 1, and 5 is a notch portion 4 formed on the toe side and heel side corners on the back face surface 2b side of the head body 2. A pair of left and right balance adjustment portions formed by detachably covering the cover portion 6, and a cover portion fixing screw 8 for fixing the cover portion 6 to the head body 2.

In FIG. 2, 3 is a sole of the golf club head 1, 3a is a recess formed in a center portion between a toe side and a heel side of the sole 3 of the head body 2, and 3b is a face surface 2a of the head body 2 in the recess 3a. It is an inclined portion formed by carving from the back face surface 2b side so that the side is deep.
The depth of the concave portion 3a can be selected according to the type and count of the golf club, or the user's preference, wrinkles, etc., but is formed to 2 mm to 6 mm. As the depth of the recess 3a becomes shallower than 2 mm, the position of the center of gravity of the head body 2 becomes lower, the ball is more likely to be braked by backspin, and there is a tendency that it is difficult to cope with long and middle distance putting. As it becomes larger than 6 mm, the center of gravity of the head body 2 becomes higher, the speed of the ball is easily accelerated by topspin, the controllability is lowered, and it tends to be difficult to cope with short putting. This is because.

Next, details of the balance adjusting portion of the golf club head will be described.
4 is an exploded perspective view of the golf club head used in the golf club of the first embodiment, FIG. 5 is a cross-sectional view taken along line AA in FIG. 3, and FIG. 6 is a cross-sectional view taken along line BB in FIG. FIG. 7 is a sectional view taken along the line CC of FIG.
It is.
4 and 5, reference numeral 2e denotes a main body female screw portion formed on the end face of the notch portion 4 on the back face surface 2b side, 7 denotes a balancer fixing tool for fixing a balancer 9 described later, and 7a denotes a balancer 9. An insertion shaft 7b of the balancer fixture 7 inserted through an insertion hole 9a drilled in the center of the balancer 7b is formed at one end of the insertion shaft 7a and is screwed into the body female screw portion 2e of the notch portion 4. The male screw portion 7c of the fixture 7 has an outer shape larger than the insertion hole 9a of the balancer 9 and the head of the balancer fixture 7 disposed at the other end of the insertion shaft 7a, and 7d rotates the balancer fixture 7. The four tool fitting recesses 7e formed in the head 7c for fitting the tool to be attached and detached, and the balancer fixing 7e is formed in the center of the head 7c and screwed with the cover fixing screw 8. The head female screw portion 8a of the tool 7 and the cover 8 of the cover portion 6 The male screw portion of the cover portion fixing screw 8 inserted through the through hole 6d formed on the side of the face face 2b and screwed to the female screw portion 7e of the balancer fixture 7 is provided at the end of the male screw portion 8a. A head portion 8c of the cover fixing screw 8 is provided. Four tool fitting recesses 9c formed in the head 8b for fitting a tool to be attached / detached by rotating the cover fixing screw 8. A plurality of balancers that are formed in a disc shape and are fixed by inserting the insertion shaft 7a of the balancer fixing tool 7 into the central insertion hole 9a, 10 is an end surface of the notch portion 4 on the back face surface 2b side, and the balancer 9 A spacer 10a that is disposed between the spacers 10 and fixes the balancer 9 is an insertion hole that is formed in the center of the spacer 10 and through which the insertion shaft 7a is inserted.

Although the loft angle varies depending on the type of golf club, the number of the golf club, and the preference of the user, in the present embodiment, as shown in FIG.
As the loft angle becomes smaller than 3 degrees, it becomes difficult to apply backspin, the deceleration effect is likely to be reduced, the ball core is difficult to catch, and the directionality tends to be distorted. This is because it has been found that as the rate increases, the deceleration effect becomes too great and the distance tends to become difficult to reach.
By setting the loft angle to 5 degrees to 10 degrees, the core can be easily caught even for beginners and intermediate persons, skidding does not occur easily, the stability in the putting direction is excellent, and in particular, a putter for short putting It can be suitably used for clubs.

6 and 7, 6b and 6c are partitioned from the balancer-accommodating recess 6a (see FIG. 6) and formed on the crown 2d side and the sole 3 side of the head body 2, respectively, and one or more center-of-gravity height adjustment balancers (see FIG. 6). (Not shown) are a pair of upper and lower center of gravity height adjustment units.
In the present embodiment, because of the shape of the sole 3, the center-of-gravity height adjustment unit 6c is shorter than the center-of-gravity height adjustment unit 6b, so that a part of the center of gravity height adjustment unit 6c on the face surface 2a side has a large diameter. In order to accommodate a large center-of-gravity height adjustment balancer, the upper and lower center of gravity can be balanced between the center-of-gravity height adjustment unit 6b and the center-of-gravity height adjustment unit 6c. The shapes of the adjusting unit 6b and the center-of-gravity height adjusting unit 6c are not limited to this, and can be appropriately selected according to the shape of the sole 3 and the like.

As the balancer 9 and the center of gravity height adjustment balancer, in addition to those formed mainly of metals having a large specific gravity such as tungsten, brass, iron, copper, and gold and metals having a small specific gravity such as magnesium, aluminum, and titanium, A combination of synthetic resin such as ABS resin and PC resin having a specific gravity smaller than that of metal and PC resin, synthetic rubber, and the like can be used.
The position of the center of gravity of the golf club head 1 can be easily adjusted by the combination of the material, number, and arrangement of the balancer 9 and the center of gravity height adjustment balancer.
The total weight of the balancer 9 can be selected as appropriate, but can be adjusted at a ratio of 0.5% to 50% with respect to the total weight of the golf club head 1. As the ratio of the total weight of the balancer 9 to the total weight of the golf club head 1 is less than 0.5%, the balance adjustment effect tends to be insufficient, and as the ratio exceeds 50%, the head body 2 is increased. This is because it has been found that the weight of the single unit becomes too light, the head speed tends to be high when the balancer is not added, and the braking effect tends to decrease.
Since the balance adjustment unit 5 adjusts the balance of the center of gravity by the balancer 9, the cover unit 6 is preferably formed of a lightweight material, but in order to prevent damage due to external force, engineering such as polycarbonate having excellent mechanical strength. It was formed using a light metal material such as resin or magnesium.

A method of adjusting the balance of the golf club head used for the golf club of Embodiment 1 formed as described above will be described.
First, in FIGS. 4 and 5, the cover fixing screw 8 is rotated with a tool to loosen the fastening between the male screw portion 8a of the cover fixing screw 8 and the head female screw portion 7e of the balancer fixing tool 7, thereby reducing the head. Remove the cover 6 from the main body 2.
Next, the balancer fixture 7 is rotated with a tool, and the balance between the balancer fixture 7 and the balancer fixture 7 is released from the head body 2 by loosening the fastening between the male screw portion 7b of the balancer fixture 7 and the main female screw portion 2e of the head body 2. 9. Remove the spacer 10 and remove the balancer 9 and the spacer 10 from the insertion shaft 7 a of the balancer fixture 7.
The weight, number, and arrangement of each balancer 9 are selected and inserted into the insertion shaft 7a of the balancer fixture 7 in accordance with the flight distance required by the golf club, the wind and green conditions, or the user's preference and habit. Then, the male screw portion 7 b of the balancer fixing tool 7 is screwed and fixed to the main body female screw portion 2 e of the head main body 2.
The number and arrangement of the balancers 9 accommodated in the balancer accommodating recesses 6a of the pair of left and right balance adjusting portions 5 may be the same on the toe side and the heel side, or may be different.
Thereby, the center-of-gravity position of the head body 2 in the front-rear direction and the left-right direction can be adjusted.

Next, one or more center-of-gravity height adjustment balancers are fitted to the upper and lower center-of-gravity height adjustment units 6b and 6c of the cover unit 6 shown in FIG. By selecting the weight, number, and arrangement of each center-of-gravity height adjustment balancer, the center-of-gravity position in the vertical direction of the head body 2 can be adjusted. The center-of-gravity height adjustment balancer may be simply fitted with a columnar or prismatic shape in accordance with the shape of the center-of-gravity height adjustment units 6b and 6c, but is filled with an adhesive after the position of the center of gravity is determined. It may be fixed equally.
Note that a magnetic force may be given to the balancer or the center-of-gravity height adjustment balancer. This is because a plurality of balancers and a center-of-gravity height adjustment balancer are unlikely to fall apart, and the center of gravity can be easily adjusted and fixed, resulting in excellent handling.

The golf club according to the first embodiment is obtained by inserting and fixing the shaft into the shaft insertion hole 2c of the golf club head 1 configured as described above.
Although the golf club head 1 for putter has been described in the present embodiment, the same theory can be applied to wood, iron, and the like. That is, a pair of left and right balance adjustment portions 5 are formed on the toe side and heel side of the back face 2a surface side of the head body 2, and a cover portion 6 detachably covered on each balance adjustment portion 5 is provided with a balancer 9. A balancer receiving recess 6a surrounding the outer periphery of the head, and a pair of upper and lower center of gravity that is partitioned from the balancer receiving recess 6a and is formed on the crown 2d side and the sole 3 side of the head body 2 and stores one or more center of gravity height adjustment balancers. By having the height adjusting portions 6b and 6c, the balancer 9 accommodated in the balancer accommodating recess 6a not only adjusts the center of gravity position in the front-rear direction and the left-right direction of the head, but also adjusts the center of gravity position in the vertical direction. It is possible to set the optimum balance of the center of gravity according to the user's habits and preferences, etc., and it has the effect of excellent flexibility and versatility of center of gravity adjustment .

As described above, the golf club head according to the first embodiment is configured, and thus has the following effects.
(1) The balance adjuster cover that is detachably covered on the head body has a balancer-receiving recess that surrounds the outer periphery of the balancer, thus protecting the balancer from wind and rain and external forces to prevent damage or loss. Can be used and has excellent usability.
(2) Since the cover portion has a pair of upper and lower center of gravity height adjustment portions which are formed on the crown side and the sole side of the head body and accommodate one or more center of gravity height adjustment balancers, the cover portion is accommodated in the balancer accommodation recess. The balancer can adjust the center of gravity in the vertical direction as well as in the front and rear and left and right directions of the head, and can set the optimal center of gravity balance according to the user's habits and preferences. Excellent flexibility and versatility.
(3) Since the balancer accommodating recess and the pair of upper and lower center of gravity height adjusting portions are partitioned, the balancer accommodated in the balancer accommodating recess and the center of gravity height adjusting balancer accommodated in the center of gravity height adjusting portion interfere with each other. There is no, and it is excellent in usability.
(4) Select the number of balancers housed in the balancer housing recess and the center of gravity height adjustment balancer housed in the center of gravity height adjustment section, the specific gravity (weight) of each balancer and center of gravity height adjustment balancer, and the combination of arrangements Therefore, regardless of the shape of the head body, it is possible to easily adjust the center of gravity of the head body in a wide range and select the optimal position according to the user's habits and preferences, etc. Excellent versatility.
(5) When the balancer or the center of gravity height adjustment balancer makes the center of gravity of the entire head heavier on the face side or sole side, the face surface will easily hit the ball core (position lower than the center of gravity on the equator). The backspin rotation of the ball can be increased, the ball can be easily controlled, and it has excellent usability as a club head for a short club or for putting in a short distance or fast green.
(6) When the balancer or the center-of-gravity height adjustment balancer is used so that the center of gravity of the entire head becomes heavy on the crown side or back face surface, the face surface hits the ball core (near the center of gravity on the equator) or slightly higher than the core. This makes it easier to reduce the loss during impact and increase the flight distance. On the other hand, when the center of gravity of the entire head is adjusted to the sole side with a balancer or a center of gravity adjustment balancer, it becomes easier to hit the bottom of the ball core (position lower than the center of gravity on the equator), increasing the loss at impact and flying distance Can be suppressed.
(7) A main body female in which a balance adjusting portion is formed on a notch portion formed on a toe side and a heel side corner on the back face surface side of the head main body, and an end surface on the back face surface side of the notch portion. Since the screw portion is provided, the balancer fixture can be easily attached and detached, the balancer can be easily replaced, and the maintainability is excellent.
(8) A male screw part that is screwed into the female female screw part of the notch is formed at one end of the insertion shaft of the balancer fixing tool, and a head having an outer shape larger than the insertion hole of the balancer is formed at the other end. By simply inserting the insertion shaft into the insertion hole of the balancer and screwing the male screw part into the female screw part of the main body, the balancer is provided between the end face on the back face surface side of the notch part and the head part. Can be held so that the balancer is fixed stably.
(9) A head female screw portion is formed on the head of the balancer fixing tool, and a through hole communicating with the balancer housing recess from the back face surface side is formed in the cover portion, so that the cover portion fixing screw is The cover part can be easily and firmly fixed to the head body simply by being inserted through the through-hole of the cover part and screwed into the female screw part of the head of the balancer fixture, and is excellent in disassembly and assembly workability. .
(10) The insertion shaft of the balancer fixing tool is screwed into the female female threaded portion formed on the end surface of the notch on the back face surface side, so that the head surface from the face surface side to the back face surface side. Since it is arranged substantially horizontally, the position of the center of gravity can be adjusted in the front-rear direction between the face surface side and the back face surface side by a combination of the number of balancers, specific gravity, and arrangement, which is excellent in usability.
(11) As a balancer and a center-of-gravity height adjustment balancer, by combining one or more of metals, synthetic resins, and synthetic rubbers with different specific gravity, the center of gravity position in the vertical direction is added in addition to the longitudinal and lateral directions of the head body. Can be easily adjusted, and can respond finely to the user's habits and preferences, etc., and is excellent in the flexibility and versatility of adjusting the center of gravity.
(12) The width of the center-of-gravity position adjustment by the balancer and the center-of-gravity height adjustment balancer by reducing the weight of the head body by having a recess formed in at least the center part between the toe side and the heel side of the sole of the head body. The center of gravity can be adjusted and the versatility of the center of gravity is excellent.
(13) By forming a recess in the sole of the head body, the center of gravity of the head body becomes higher, and the face hits a position slightly higher than the center of gravity (equatorial position) of the ball, so that the top spin causes the ball to rotate at high speed. It becomes easy, the speed is accelerated, and the effect that the ball stretches well can be expected, and it can be suitably used for long or middle distance putting.
(14) The center of gravity position can be adjusted freely by combining a balancer or a center of gravity height adjustment balancer with the head body that has a recessed portion in the sole and has previously raised the center of gravity. The face hits a position slightly lower than the center of gravity (equatorial position) of the ball, and the ball is slightly braked by backspin to reduce the speed. It can be used suitably.
(15) Since the concave portion has an inclined portion formed by carving from the back face surface side so that the face surface side of the head body is deep, the turf can easily come out of the concave portion at the time of swing, and the head can be shaken out smoothly. Can be used and has excellent usability.

As described above, the golf club according to Embodiment 1 is configured, and thus has the following effects.
(1) Since the shape of the sole of the head main body is formed by any one or a combination of a bounce sole, a scoop sole, a flat sole, and a round sole, the type of golf club, the count, or the user It can be adapted to the tastes and tastes of the machine, and has excellent versatility.
(2) When the shape of the sole has a bounce sole shape with a low face surface on which the ball hits and a high back face surface side, it is not easily affected by the lawn, and not only a sense of distance but also an accurate directionality is obtained. Excellent handleability. In particular, when used as a club head of a putter for short putting, a deceleration (braking) effect can be obtained, and as a result, the probability of cup-in can be improved for putting about 1 to 2 m.
(3) Adjust the balance of the center of gravity of the head three-dimensionally with a balancer or a center of gravity adjustment balancer, and select the optimal center of gravity balance according to the individuality of the player. The backspin (reverse rotation) and topspin can be applied to the ball, it is easy to control the ball, and it can be used for a wide range of distances from putting and short clubs to long clubs. Excellent versatility and usability.
(4) When a golf club head for a putter is used, it can be used for a long putting to a short putting by combining with a center of gravity height adjustment balancer. If the position of the center of gravity is increased, the ball will be stretched well and can be suitably used for putting long or middle distances. If the position of the center of gravity is decreased, the distance is short or fast in the green or around the green (color or edge). It can be suitably used for putting, and can easily adjust the directionality and the sense of distance, is hardly affected by the lawn, and has excellent usability.
(5) When a golf club head for wood or iron is used, the backspin (reverse rotation) or topspin can be easily applied to the ball by optimally adjusting the balance of the center of gravity with a balancer or center of gravity height adjustment balancer. This makes it easy for beginners to control the ball and provides excellent usability.

  In the first to third embodiments, the putter golf club heads 1, 1a, 1b and the golf clubs 20, 20a, 20b having the same have been described. However, the same theory applies to wood, iron, and the like. Can be applied. That is, the turf is provided with the concavo-convex portions 6A, 6C, and the concavo-convex portions 6A and 6D having the concave and convex portions 6A and 6d having the plurality of ridges 6a and 6b intersecting each other. Since it is caught in 6D, the head speed can be suppressed, the distance can be reduced, the ball 30 can be easily controlled, and the handleability is excellent. Further, when the shape of the sole 3 has a bounce sole shape that is high on the face surface 2a side on which the ball 30 hits and low on the back face surface 2b side, not only the sense of distance but also accurate Directionality is obtained and it has the effect | action that it is excellent in handleability.

  The present invention can easily apply backspin (reverse rotation) or topspin to the ball by optimally adjusting the balance of the center of gravity in the vertical direction as well as the longitudinal and lateral directions of the head according to the individuality of the player. Providing a golf club head with excellent versatility that allows easy control of the ball, excellent handling, and fine adjustment of the center of gravity that can be finely adjusted over a wide range. We provide golf clubs with excellent functionality and ease of use that can easily adjust the distance, speed, rotation, and rolling of the ball according to the distance, type of grass on the green, and conditions. In addition, it is possible to increase the score of advanced players and increase the golf population.

1 is a perspective view of an upper surface side of a golf club head used in the golf club of the first embodiment. A perspective view of a bottom side of a golf club head used for the golf club of the first embodiment Top view of golf club head used for golf club of embodiment 1 1 is an exploded perspective view of a golf club head used in the golf club of the first embodiment. 3 is a cross-sectional view taken along line AA in FIG. BB cross-sectional view of FIG. CC sectional view taken along the line CC in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Golf club head 2 Head main body 2a Face surface 2b Back face surface 2c Shaft insertion hole 2d Crown 2e Main body female screw part 3 Sole 3a Inclination part 4 Notch part 5 Balance adjustment part 6 Cover part 6a Balancer accommodation recessed part 6b, 6c Center of gravity Height adjusting portion 6d Through hole 7 Balancer fixture 7a Insertion shaft 7b Male screw portion 7c Head portion 7d Tool fitting recess 7e Head female screw portion 8 Cover portion fixing screw 8a Male screw portion 8b Head portion 8c Tool fitting recess 9 Balancer 9a Insertion hole 10 Spacer 10a Insertion hole

Claims (8)

A golf club head having a pair of left and right balance adjustment portions each having one or a plurality of balancers detachably accommodated and having a cover portion detachably covered on a toe side and a heel side on the back face side of the head body. There,
The cover portion is partitioned from the balancer receiving recess that surrounds the outer periphery of the balancer, and the balancer receiving recess, and is formed on the crown side and the sole side of the head body to receive one or more center-of-gravity height adjustment balancers. A golf club head comprising a pair of upper and lower center of gravity height adjustment portions. The balance adjusting portion is a notch portion formed on a toe side and a heel side corner on the back face surface side of the head body, and a main body female formed on an end surface of the notch portion on the back face surface side. A screw portion, an insertion shaft that is inserted through an insertion hole formed in a central portion of the balancer, and a male screw that is formed at one end of the insertion shaft and is screwed into the main female screw portion of the notch portion A balancer, a head having an outer shape larger than the insertion hole of the balancer and disposed at the other end of the insertion shaft, and a head female screw formed on the head A fixing tool, and the cover portion is connected to the balancer-accommodating recess from the back face surface side of the cover portion, and the head female screw portion of the balancer fixing tool is inserted through the through-hole. A cover fixing screw to be screwed onto And golf club head according to claim 1, characterized in that are. 3. The golf club head according to claim 1, wherein the balancer and the center-of-gravity height adjustment balancer are a combination of one or more of metals, synthetic resins, and synthetic rubbers having different specific gravities. 4. The golf club head according to claim 1, further comprising a recess formed in a center portion between at least a toe side and a heel side of the sole of the head main body. 5. 5. The golf club head according to claim 4, wherein the concave portion includes an inclined portion formed by carving from the back face surface side so that the face surface side of the head body is deep. The shape of the sole of the head main body is formed by any one or a combination of a bounce sole, a scoop sole, a flat sole, and a round sole. 2. A golf club head according to item 1. 7. The golf club head according to claim 1, wherein the golf club head is one of wood, iron, and putter. A golf club comprising the golf club head according to claim 1.

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