JP4922543B2 - Golf club - Google Patents

Abstract

There is disclosed a golf club such as a putter and in one embodiment an attachment for the same. The club head has at least one striking face, a rear face and side faces or edges defining a body of a predetermined thickness to which a shaft is attached. Within the body of the head there is provided a recess in a form which opens into the rear face of the head or as a closed aperture completely defined with the body which is of marginally greater dimensions than, and adapted to receive an object such as a conventionally sized golf ball. The recess or aperture can be disposed substantially centrally of the head behind the striking face of the club head so that the "sweet spot" on the striking face can be substantially centrally disposed of said recess or aperture. Ideal toeheel weight distribution can be achieved in this manner. The club, which is typically a putter, can be used as a practing aid by swinging the same proximate a surface when the article or object is disposed within said recess or aperture. In one embodiment when the putter is swung so that it is no longer proximate the floor, the object or article is released and its momentum causes the same to continue moving in a direction imparted to it by the swinging of the putter. The swing profile of a user can thus be quickly assessed. The attachment embodiment functions in a similar manner.

Description

  The present invention relates to a golf club, and more particularly, but not exclusively, to a putter used in a golf game for hitting a ball along a green surface.

  Golf is generally played on a course having 18 holes or 9 holes, and a ball is hit by a player from a tee at one end of the hole, and a green having one hole therein is provided at the other end. The tee and green are separated by a fairway, and the overall principle of the golf game is to drop the ball into the hole on the green with as few ball hits as possible.

  The putter is generally used on or around the green to direct the golf ball toward the hole so that the ball falls into the hole. The hole is only on the order of 12 centimeters in diameter, and the putt (which is commonly referred to as hitting with a putter) is often done over 12 meters (40 feet), so To ensure that the ball position is at least close, even if not in the hole, it must be very accurate. In general, the distance of the ball from the hole is proportional to the likelihood of a putt error, and more putts are required to drop the ball into the hole.

  In golf competitions, a significant portion of the professional competition is concentrated in putting, and poor players of the putt rarely get successful results. The difference in the scores of players who have equal “tee to green” abilities but are equal in put abilities is immediately apparent.

  The fact that relatively few putter exercise tools are currently available is surprising, especially when considering that putting is a substantial component of the competition. One practice tool that can be obtained is conventionally used for indoor use, but is composed of a plastic tray having a groove inclined in a U-shape, and the groove has a narrowed length direction. One end is closed and located substantially in the center of the practice tool and on the base, and the other end is open and close to the base level. The groove is typically formed integrally in the practice tool, and when the practice tool is placed on a carpet or the like, the wide open end of the groove coincides with the outer periphery of the practice tool, and the steep lower end on the carpet is Constitute. The groove is inclined upward from the wide open end toward the closed end in the practice tool body. There is also an ejector mechanism that is powered by batteries.

  In use, the practice tool is placed on the carpet, and a user who wants to practice his putt puts the ball at the practice tool and puts it at a distance from the practice tool. The practice tool is arranged so that the open end of the groove faces the user. Due to the sharp lower end of the groove placed on the carpet, the ball hit accurately along the carpet is guided to the closed end of the groove provided in the practice tool toward the groove. A ball that has been puttered in the correct direction for the correct load and training equipment will itself go towards the closed end, which has a small recess and is formed into the spherical shape of a golf ball. The battery-powered ejector mechanism then detects the presence of the ball at the closed groove end and ejects the ball through the inclined groove so that the player can again put the ball in the correct weight and direction. It should be understood that with a good putter, the ball can be repeatedly hit by being received in a narrow groove and in a recess at its closed end.

  The main and overall difficulty of such exercise equipment is that it does not solve any of the myriad imperfections that often occur in player putting. In order to hit the golf ball in the correct direction with a putter, a smooth and accurate swing is required. In particular, the arc drawn when the putter head leaves the stationary ball during “back swing”, the arc drawn when the putter head returns to the ball to hit the ball, and the arc drawn after hitting the ball, ie follow-through, The center is part of an imaginary circle that is roughly between the golfer's shoulders. Furthermore, the diameter of the circle in the direction in which it is desired to hit the ball should be parallel to the plane containing the player's feet. Otherwise, the player's putt will either slice the ball or hit the ball from below when impacted from above when viewed from above. In any case, an undesirable velocity factor is imparted to the ball upon impact by the face. The only velocity element that is ideally applied to the ball at impact is that in the desired direction of strike. In this case, the ball simply rolls in the direction in which it was struck.

U.S. Pat. No. 5,725,441 discloses an example of a golf putter that can be used as a practice aid, the golf putter comprising a putter head having a series of stepped concentric recesses formed in the upper surface thereof. . The ball can be maintained in this recess and the ball is retained in the recess during the correct putter swing. If the putting stroke accelerates or decelerates too quickly, the ball that is being held is shaken or removed from the recess. Therefore, this practice aid does not contain any information about the direction of the pad and can only be used to indicate that the speed of the pad is incorrect, thus limiting its use. Is done.

  One object of the present invention is to provide a putt exercise tool that allows a player to analyze whether the ball is imparting an undesirable velocity factor upon impact.

  Another object of the present invention is to provide a putter which preferably can be used in competitions and in informal games and / or practice without violating the current rules regarding putter structure.

Still another object of the present invention is to ensure that the arcuate path of the putter head corresponds to the theoretical optimal trajectory, especially when used for practice, so that the player's backswing and follow-through are particularly pre-impact. And providing a putter that can "habitually" put a player's putt by responding to the optimal trajectory described later.

  Yet another object of the present invention is to ensure that, when used for practice, the putter head's arcuate rotation path corresponds to the theoretical optimal trajectory, particularly when the player's backswing and follow-through are pre-impact. And providing a putter that can "habitually" put a player's putt by responding to the optimal trajectory described later.

According to the present invention, in the first aspect, a golf club having a head, the head has at least one striking surface, a rear surface or an end portion, and a side surface or an end portion, which are curved. Each end or surface limits the head to a predetermined thickness, and a shaft for swinging a club is attached to the head, the head having at least one other arcuate surface or end. Or another flat plate surface or end portion, and at least one recess portion is defined between the side surface or the end portion, and the at least one recess portion defined by the other surface or end portion is a head hitting A golf club is provided that is adapted to receive an object or object behind a surface.
Typically, the at least one recess passes through the thickness direction of the golf club head.

According to the present invention, in the first aspect, a golf club having a head, the head has at least one striking surface, a rear surface or an end portion, and a side surface or an end portion, which are curved. Each end or surface limits the head to a predetermined thickness, and a shaft for swinging a club is attached to the head, the head having at least one other arcuate surface or end. Or another flat plate surface or end portion, and at least one recess portion is defined between the side surface or the end portion, and the at least one recess portion defined by the other surface or end portion is a head hitting A golf club is provided that is adapted to receive an object or object behind a surface.
Typically, the at least one recess passes through the thickness direction of the golf club head.

  In one embodiment, the object or object is movable with respect to the head, but if the ball contacts the other surface or end while the club is being swung by the user, the head will cause the movement to strike the surface. However, it acts to limit the parallel direction.

A golf club is typically a putter that is particularly suitable for the practice of the present invention, and in the present invention refers to a putter.
The shaft does not have a key feature in the present invention, and in another aspect of the present invention, it relates to a golf club head whose features are described.
The object or object received in the recess has a shape or size that fits into the recess, and a ball, more specifically a normal golf ball, is suitable as a preferred embodiment.
In the first aspect of the invention, the recess is open at the rear or end of the putter, and in the second alternative, the recess is closed to form a hole in the putter body. The holes are preferably circular and their diameter is marginally larger than the diameter of a normal golf ball.
Preferably, the recess in the first aspect is limited to two side surfaces by another surface or end of the main body, and separation of the other surface or end is more limited than an object received in the recess during use. Set to be larger.
In the above-described embodiment, it is preferable that the other surfaces or ends are parallel to each other and perpendicular to the striking surface. Furthermore, the other surface or end is provided at substantially the same distance from the center of the striking surface, and therefore preferably has a complementary function as an alignment means.
In any case, it is desirable that the head of the putter is provided with supplemental alignment means, which is a means for directing the hitting surface from the front in the desired direction of movement of the ball after hitting the ball to the putter user. .

  Preferably, additional load elements are provided on either side of the recess in the putter head body so that the “toe / heel” load arrangement is balanced. The toe and heel of the putter head are located toward the tip of the striking surface, and the load arrangement across the striking surface reduces the torsional moment applied to the putter head when the impact point with the ball is away from the striking surface. Is provided.

In some embodiments, the object or object in the recess may be placed in a “fixed” position during use, thereby providing a selected effect for use of the golf club. . In one embodiment, the object or object has a load or load arrangement that changes the characteristics of the club when secured to the recess by suitable engagement means.
The golf club head may be of any suitable shape, for example, a mallet type or a blade type head.

When a recess is provided in the shape of a hole in the putter head, the entire thickness is preferably defined by the other surface or end, and the hole is substantially the center of the putter head when viewed as a whole. Is provided. However, it may be provided in different places of the hole depending on personal preference or by special practice techniques.
Apart from the position of the hole, the toe-heel load arrangement is obtained automatically. This is because, as described, when the object is released from the head, the relative load toward the tip of the striking surface automatically increases.

When a recess is provided in the shape of a hole in the putter head, the entire thickness is preferably limited by the other surface or end, and the hole is substantially the center of the putter head when viewed as a whole. Is provided. However, it may be provided in different places of the hole depending on personal preference or by special practice techniques.
Apart from the position of the hole, the toe-heel load arrangement is obtained automatically. This is because, as described, when the object is released from the head, the relative load toward the tip of the striking surface automatically increases.

If the holes are made towards the back of the putter head body, a large “sweet spot” (the area of the striking surface that creates resonance dynamics in the body of the putter head when there is an impact) is obtained. Experimentation can limit the exact location of the hole that produces the largest sweet spot for a particular head configuration.
In another aspect of the invention, the recess can accept an object or object as well as an insert in the form of a sleeve.

  In some embodiments, the sleeve is provided to change the size and / or shape of the recess in which the object or object is placed. In addition or alternatively, the insert is provided in the recess so that after the object or object is placed therein, the insert holds or more securely holds the object or object in the recess, and It is provided to guide the movement of the object with the head.

In some embodiments, the insert can move relative to the head and the recess. In some embodiments, when the target or object is also in the recess, the insert can be moved to adjust the position of the target or object in the recess, thereby providing multiple locations for the object in the recess. .
Alternatively, the insert itself is an object or object that can be selected, and can be moved with respect to the recess so that its function can be varied.
In another embodiment, the club head wall defining the recess is shaped to meet certain requirements, for example, concave or convex, and can hold or release the object in a controlled manner from the recess. It may be a thing.
In one aspect of the present invention, the head may have a plurality of recesses therein, at least one of which is provided for receiving an object, the object when the player swings the golf club. Can be released.

  Typically, the object is a golf ball, and in one embodiment, each recess is adapted to receive an object therein. Each of the recesses may be arranged in a desirable configuration with respect to each other, but two particularly useful configurations are arranged such that the plurality of recesses are along an axis that is substantially perpendicular to the striking surface of the club head, or Alternatively, or additionally, the plurality of recesses are arranged along an axis that is substantially parallel to the striking surface of the club head. Various configurations of the recesses allow observation of various and selected characteristics of the golf club swing, such as swing arc, head accuracy during movement, and / or club grip.

According to another aspect of the present invention, a golf club having a head, the head has at least one striking surface, a rear surface or an end portion, and a side surface or an end portion, each of the surfaces or the end portions being A club head body is defined , the body having a predetermined thickness, the head having at least one other arcuate surface or end, or another flat surface or end, which is a side or end. At least one recess defined between the portion and the entire body thickness, the at least one recess defined by the other surface or end receiving an object or object behind the striking surface of the club head A golf club configured as described above is provided.

  According to another aspect of the present invention, a golf club having a head, the head has at least one striking surface, a rear surface or an end portion, and a side surface or an end portion, each of the surfaces or the end portions being A club head body is defined, the body having a predetermined thickness, the head having at least one other arcuate surface or end, or another flat surface or end, which are side or end. At least one recess defined between the portion and the entire body thickness, the at least one recess defined by the other surface or end receiving an object or object behind the striking surface of the club head A golf club configured as described above is provided.

According to a third aspect of the present invention, there is provided a putter head attachment body attached to the putter head by an appropriate means, wherein the attachment body defines at least one attachment position and at least one recess therein. Having one arcuate surface or end or another flat surface or end, the recess is limited to the back of the putter head and is in contact with the surface or end while the ball swings the putter by the user Sometimes, the recess is provided with an attachment that is configured to receive an object or object in the form of a normal golf ball and limit its movement in a direction parallel to the striking surface.
The mounting body preferably has an arcuate ring behind the mounting position, and the limiting end or face has a separation that is marginally larger than the diameter of a normal golf ball.
In another embodiment, the mounting body is provided with a pair of spaced limbs extending substantially parallel to the rear of the mounting body position, the separated portion of the limb being marginally larger than the diameter of a normal golf ball.
Preferably, the attachment means securely attaches a uniform and reusable attachment body to the putter head.

According to a third aspect of the present invention, there is provided a putter head attachment body attached to the putter head by an appropriate means, wherein the attachment body defines at least one attachment position and at least one recess therein. Having one arcuate surface or edge or another flat surface or edge, the recess is confined to the back of the putter head and is in contact with the surface or edge while the ball swings the putter by the user Sometimes, the recess is provided with an attachment that is configured to receive an object or object in the form of a normal golf ball and limit its movement in a direction parallel to the striking surface.
The mounting body preferably has an arcuate ring behind the mounting position, and the limiting end or face has a separation that is significantly larger than the diameter of a normal golf ball.
In another embodiment, the mounting body is provided with a pair of spaced limbs extending substantially parallel to the rear of the mounting body position, the separated portion of the limb being marginally larger than the diameter of a normal golf ball.
Preferably, the attachment means securely attaches a uniform and reusable attachment body to the putter head.

In another aspect of the present invention, there is provided a practice method for improving a golf swing using a golf club having means for holding a golf ball to the golf club head, wherein the golf ball is separated from the golf club head during the swing of the club. In the method of allowing detachment, the practice method includes: placing the golf ball at a holding position of the golf club head, swinging the golf club head, and swinging the golf ball trajectory released from the golf club head during the swing; A method comprising observing the speed is provided.
The present invention will become more apparent from the following description with reference to the accompanying drawings.

  Referring first to FIG. 1, a putter head 2 is shown having a striking face 4, side faces 6, 8 and a rear face 10, which generally define a body 12 of the putter head. A hole-shaped recess 14 is provided in the body 12 and extends over its entire thickness. Although the holes 14 are disposed substantially symmetrically in the body 12 of the putter head 2 about the horizontal axis 16 and the vertical axis 18, the exact location of the hole center varies within the body 12. May be separated from either of the axes 16, 18 according to choices or experiments relating to the position and size of the sweet spot, generally indicated at 14, of the striking surface 4. It should also be understood that changing the position of the holes 14 changes the dynamic and vibrational characteristics of the putter head. Such characteristics can be changed by providing a toe load 20 and / or a heel load 22 at the toe position 24 or the heel position 26 of the putter head 2. Thus, various changes and improvements can be made to the putter head 2 as desired. One example of such a change is to provide one or more holes in the golf club head, which functions in a manner similar to that already described for the single hole 14.

  The heel region 26 is further provided with a location 28, to which a putter shaft is connected, which allows the user to shake the putter. Such a shaft is shown at 30 in FIGS. 3-5. Although the putter head of FIG. 1 is a mallet type putter head, various types of putter heads can be employed, and according to the present invention, other golf clubs such as drivers or It may be a “wood” golf club. The putter head of FIG. 2 is further provided with a grooved area 32 having end portions 34 and 36 that are recessed from the upper surfaces of the toe and heel regions 24 and 26. While such a feature is not essential to the present invention, a putter having this feature can be matched to the desired flight direction indicated by the ball 38 hit by the striking face 4. This is because the groove edges 34, 36 define discreet edges 40, 42 that are substantially parallel to the desired striking direction 38 and perpendicular to the striking face 4. .

2A and 2B, an alternative configuration of the putter head 2 is shown. In FIG. 2B, the putter head 50 is provided with a U-shaped recess 52 on the rear surface thereof. Accurate alignment of the putter is achieved by separate internal surfaces 54, 56 that define the recess 52. Because these internal surfaces define the ends of the top surface 58 of the putter head, they are parallel to the desired striking direction, perpendicular to the striking surface 4 and the end 40 described with respect to FIG. , 42.
Another putter head 60 is shown in FIG. 2 b and is provided with a hole 62 whose center deviates from both the horizontal axis 62 and the vertical axis 64. Alignment means 66, 68 are provided in a manner similar to that described with respect to FIG.

  The main feature of the present invention is that the recess preferably has a relative dimension that is marginally larger than the diameter of the object housed therein, for example an object in the form of a normal golf ball. Therefore, such a golf ball is accepted with tolerance in the hole and recess. In the case of the recess 52, the distance between the end portions 54 and 56 is critically larger than the diameter of a normal golf ball, and in the case of the circular holes 14 and 62, the diameter is critically larger than the diameter of the golf ball. Thus, when swinging back swing and putter, the holes and recesses prevent the golf ball from moving significantly in the direction of the longitudinal axes 18, 64, and in the case of FIG. Make sure there is nothing. This feature is described in more detail with respect to FIGS. 3-5.

  An alternative embodiment is shown with respect to FIGS. 2C and 2D, according to which an attachment body 70 with attachment means 72 is provided, which ideally impedes the striking surface 4 of the putter head 74. There is no. This attachment functions in the same way in a broad sense as the holes 14, 62 and recess 52 described in connection with FIGS. 1, 2A and 2B. In both FIGS. 2C and 2D, the relative dimensions of the mounting body 70 are marginally larger than the diameter of a normal golf ball so that the golf ball in the case of FIG. 2C has a pair of legs 75, 75 'extending backwards. Can be received by the recess 76, which is limited by, and in the case of FIG. 2D by the inner wall 77 of the circular ring. The walls 75, 75 'or 77 prevent the golf ball from moving significantly in a direction parallel to the hitting surface 4 of the putter head during a putting stroke.

  3-5, the putter head 2 described in connection with FIG. 1 is provided with a shaft 30, which is gripped by a user (not shown) and aligned by the user so as to follow a desired striking direction 38. . This alignment is important for an accurate putt and is supported by the ends 40, 42 on the top surface of the putter head 2 so that the user can determine whether the putter striking surface 4 is in the desired striking direction 38. I can confirm. If the groove of the club head material cannot be provided, the end portions 40 and 42 may be replaced with a coating line applied to the upper surface of the club.

The wall of the recess is also formed to control selected moments of holding and releasing the object during the golf swing. For example, the walls may be straight, convex or concave, and in certain embodiments, the holes are provided to selectively receive one of the rows of insertion sleeves, each sleeve being different. It has an inner wall configuration that allows the characteristics of the recess to be changed according to various practice objectives.
During play on a golf course, it is clear that there is no marking of the desired striking direction, and the user has only alignment edges 40, 42 to assist in the alignment of the putter, in which case the striking surface 4 is It is exactly perpendicular to the imaginary desired strike direction.
In order to practice using the putter head 2 having one recess, a pair of golf balls 80 and 82 are provided. The first golf ball 80 is disposed in front of the striking surface 4, and the second golf ball 82 is disposed in the hole 14 of the putter head 2. The purpose of the putt practice tool of the present invention is to ensure that the impact surface 4 and the desired striking direction 38 are exactly perpendicular during the impact between the striking surface 4 and the ball 80, and that the user is able to To be able to draw an accurate swing arc.

This is accomplished as follows:
In FIG. 4, the putter head 2 slides from the ball 80 from the back swing arc 84 to the position shown in the figure. From the figure, it can be seen that the ball 82 is supported only by the ground 86 on which practice is performed. Thus, the putter head rotates about the backswing arc 84 and ascends from the ground 86, the ball 82 simply falls from the hole 14 due to gravity, but nevertheless remains along the line of the desired striking direction 38, but vice versa. It is limited to move so that it is not an aspect. From the figure, it can be seen that at the end of the user's backswing, the putter has a thickness that prevents the ball 82 from being completely discharged from the hole 14, and the ball is partially held by the wall of the lower end surface of the putter 2. .

  Also, in contrast to swing arcs that produce the correct striking direction, it is a common disadvantage of players to bend their wrists when putting them, focus too much on impacts, and poorly putting.

  Regarding the first drawback, although not shown in the figure, the player's arm and wrist are in an ideally fixed state throughout the padding, and only the shoulder is turning to strike, thus A uniform and accurate direction of hitting is obtained. (But) If the wrist bends during striking, the putter head will rise above the ground to a greater extent than when the player's arm and wrist are stationary when backswing and swinging. The practice tool of the present invention makes it possible to quickly correct this deficiency for those who are poor at putters. Because the ball 82 is released from the hole when the player bends the wrist while hitting, if the ball is hit correctly, the wrist will not bend and the putter head will rise slowly and to a lesser extent on the ground 86 Because it is only. Furthermore, the putter of the present invention can also be used as a practice tool with only one ball 82, in which case the player holds the ball 82 in the hole 14 at any time during the hit. Can be used to polish the padding.

  For the second defect, the practice implement according to the present invention defocusses the mind of the user on the impact between the striking surface and the ball. Actually, it is not necessary to actually cause such an impact (because it is not necessary to provide the ball 80 to be hit by the putter as described above). This form of practice is valuable in that it teaches players to “play through the ball” without focusing on the impact of the striking surface. In all sports, it is actually required to take a mental approach to actually doing sports.For example, in a sprint run, a mental approach toward a point where a sprinter crosses the goal line It is clear that this is an excellent operation. The practice tool of the present invention accomplishes this.

  When the putter head swings down from the position shown in FIG. 4 to the position shown in FIG. 5, the ball 82 is captured until the putter head 2 is raised by a distance at least equal to the diameter of the golf ball 82 on the ground 86. The At this stage, the ball 82 is ejected from the hole 14 and, as a result of the angular velocity of the putter head 2 at this point, the ball 82 is given a forward speed that is directly proportional to the angular velocity of the putter head. It should be noted that when the putter head 2 returns from the position shown in FIG. 4 to the rest position in FIG. 3, the striking surface 4 impacts the ball 80, thereby imparting a forward speed to the ball. Due to this impact, and due to the fact that the angular velocity of the putter head after impact is generally lower than that at impact, the ball 82 gives a smaller angular velocity than the ball 80 and is therefore somewhat behind the ball 80.

  The above putter head functions as a practice tool in that the user of the putter with the putter head 2 can ascertain whether the follow-through arc in the user's swing indicated by number 85 is in the correct plane. . In this case, the direction of the velocity applied to the ball 82 is the same as the direction in which the ball 80 has already moved, and ideally both of these directions are the same as the desired striking direction 38.

  A common disadvantage of those who are poor at golf ball putters is that they tend to pull the putter head in the direction of the main body after hitting the ball 80. In such a state, the putter head 2 is entirely dotted. Follow the path shown at 88. If the swing arc of the putter head 2 is customarily along an incorrect trajectory, such as 88, the player's error is immediately apparent by using the practice tool of the present invention. This is because even if the ball 80 flies at least to some extent along the desired striking direction 38, the second ball 82 is released from the hole 14 of the putter head as a whole in the direction indicated by the dotted line 90. Such a momentary assessment of an inaccurate pad arc of a swing has not been possible with the currently available putt training tools.

  The putter head shown in FIGS. 2A and 2C is relative to the putter head shown in FIGS. 1B, 2D and 2D on the ground 86 along the desired striking direction 38 both in front of the striking surface and in front of and behind the putter head 2. It works differently in that it needs to be marked. The putter head shown in FIGS. 2A and 2B ideally matches the player's swing arc to the correct theoretical arc 84 during the putt swing. Thereafter, when the balls placed in the recesses 52 and 76 reach the tip of the backswing, they fly along the desired striking direction 38 marked away from the putter head, and as indicated by numeral 88 in FIG. If an incorrect arc of correct swing is habitually obtained by the player, the flight direction of the ball away from the putter head will compete with the desired hitting direction 38 marked. Thus, the practice method using the putter head shown in FIG. 1 can be performed. In this case, in the practice method, three ordinary golf balls are used, and two of them are the positions of the golf balls 80 and 82 in FIG. And a third golf ball (not shown) is just behind the rear surface 10 and just above the marked line indicating the desired direction of striking 38. In such a method, both the player's backswing and swing-off will follow a theoretically correct arc indicated by numbers 84 and 85, in which case the second golf ball 82 is taken by the ball 80 after impact. Make sure that the orbit is flying and that the third golf ball is in the direction of the marked line indicating the desired striking direction 38 but in the opposite direction of the balls 80 and 82.

  The putter head having the configuration shown in FIGS. 1, 2A and 2B has several supplementary features, in particular a plurality of holes 14 can be provided, one of which is provided toward the toe 24 of the putter head 2. The other is arranged in the direction of the heel 26. In such a state, a pair of golf balls are placed in the two holes of the putter head, and when used as a practice tool, both sides of the holes placed on the holes on both sides of the striking direction 38 where speed is desirable. It is given to golf balls. The disadvantages of the player's swing arc are clearer than with the putter head 2, and such a modified putter head is used to assess the specific orientation of the striking surface at impact and thereafter be able to.

  It has been proposed to provide a variety of different inserts or plugs, which are inserted into the holes if it is desired to obtain the desired dynamic and vibration characteristics suitable for a particular player in normal play. In addition, it has been proposed to provide a grooved hole, the diameter of which varies in the thickness direction of the putter head, and in particular, the diameter of the hole increases from the upper surface to the lower surface of the putter head. 82 allows for rapid release. This is advantageous when testing a player's short putt, or when the player's swing arc is nearly correct or requires a slight modification.

Another proposal is to provide an elastic ring on the inside surface of the hole 14 so that the player using the putter in normal play simply drives the putter head over the ball so that the ball is positioned in the hole and engages the elastic ring. It is to be able to lift the ball from the ground so that it is held.
In order to improve the overall aesthetic appearance of the putter head 2, a cap covering the upper and / or lower surface of the hole may be provided, such a cap can also be used for identification purposes, or further adjusting means on the cap. May be attached to increase the ability to adjust the putter head and the player.

The cap and the insert or the plug having the hole may be transparent, and actually the entire putter head may be formed of a transparent material.
Yet another insert may be provided to receive the recess and can be used as a load. Each insert also has a different load section and / or one or several recesses on its top surface, and the putter and insert user typically rotate the position of the insert relative to the club head. So that when placed in the hole, the load distribution is changed to obtain a putter head with varying dynamic and vibration characteristics to suit the player's particular preferences. In one embodiment, undesired movement or rotation of the load can be easily prevented by a simple locking device, for example using an allen key suitably placed in the hole of the putter head. This is done by a grub screw that can tighten the load surface.
It should be understood by those skilled in the art that various changes and modifications can be made to the present invention without departing from the spirit of the invention.

It is a perspective view of a putter according to the present invention. FIG. 6 is a plan view of a modified putter head structure each falling within the scope of the present invention. FIG. 6 is a plan view of a modified putter head structure each falling within the scope of the present invention. FIG. 6 is a plan view of an attachment body according to another aspect of the present invention, each attached to a blade putter head. FIG. 6 is a plan view of an attachment body according to another aspect of the present invention, each attached to a blade putter head. It is a perspective view of the usage mode of the putter as an exercise tool, respectively. It is a perspective view of the usage mode of the putter as an exercise tool, respectively. It is a perspective view of the usage mode of the putter as an exercise tool, respectively.

Explanation of symbols

2, 50, 60, 74 Putter head 4 Strike surface 6, 8 Side surface 10 Rear surface 12 Body
14, 52, 62 Recess, hole 24 toe (position)
26 Heel (Position)
30 Shaft 32 Grooved zone 38 with ends 34, 36 Desired flight direction 70 Mounting body 80, 82 Golf ball 84 Correct theoretical arc 88 Incorrect trajectory

Claims (9)

To improve the golfer's swing the pad, a method of using a golf club as an aid practice, the golf club has a head having a surface to hit at least ball, the rear contact and the side surface Any of these surfaces are curved , each of the surfaces defines a head of a predetermined thickness, and a shaft is attached to the head for use in swinging the club the head has a plane having at least one arcuate surface or pores between the side surfaces, said method comprising the golf club head is stationary before starting the swing, in a state in contact with the ground surface, the holes Placing the first golf ball in a holding position of the golf club, and the club head does not rise above a distance on the ground that is at least equal to the diameter of the first golf ball. By way, performing a backswing with the golf club head so that the first golf ball by a surface of the holes through the first golf ball is partially retained, the golf head, From the state in which the first golf ball remains held in the hole until it rises by a distance at least equal to the diameter of the golf ball on the ground , the first golf ball leaves the hole and the golf head and performing the swing as the speed is given forward directly proportional to the speed of, to see if the arc of the scan viewing is in the correct plane, from the between the swing first golf ball the hole when leaving, the method comprising the steps of monitoring the direction and / or speed of the first golf ball.   The second golf ball is positioned in front of a surface that strikes the ball on the ground, and the second golf ball is struck during the swing to impart forward velocity to the ball. the method of.   The method of claim 2, wherein the forward speed imparted to the first golf ball is less than the forward speed imparted to the second golf ball.   The direction of the velocity imparted to the first ball is approximately equal to the velocity direction of the second golf ball already flying when the swing is performed in the correct plane. The method of any one of Claims.   The method of claim 4, wherein the direction of velocity of the first and second golf balls is approximately equal to a desired direction of hitting the second golf ball to fly.   The method of claim 1, wherein a third golf ball is positioned adjacent to the rear surface of the golf club head and the third golf ball is struck at the start of a backswing. The method of claim 6 , wherein the third golf ball flies in a direction opposite to the first and second golf balls and in a desired direction of strike when the swing is performed in the correct plane.   The method of claim 1, wherein two holes are defined in the golf club head relative to the position of the two golf balls therein. As an aid for training to improve the golfer's swing the pad, a method for using a golf club fitting body is fixed, the golf club, have a head having a surface to hit at least ball A shaft is attached to the head for use during the swing of the club, and the attachment body is located on a surface side opposite to a surface on which the ball is hit ; has a plane with at least one arcuate surface or pores between the side surfaces, said method comprising the golf club head is stationary before starting the swing, in a state in contact with the ground, first in the holding position of the bore and placing the one golf ball, by the club head so as not rise higher than at least a distance equal to the diameter of the golf ball on the ground Performing a backswing with the golf club head so that the first golf ball by a surface of the holes through the first golf ball is partially retained, the golf head, the golf ball on the ground From a state in which the first golf ball remains held in the hole until it rises by a distance at least equal to the diameter of the front, the first golf ball moves away from the hole and is directly proportional to the speed of the golf head. and performing the swing so that the velocity is given to, in order to ascertain whether the arc of the scan viewing is in the correct plane, when during said swing first golf ball away from the hole, the first method comprising the steps of monitoring the direction and / or velocity of the golf ball, the.

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