Putter head made of magnesium alloy material

Abstract

A putter head of a golf putter is disclosed. The putter head of the present invention is a solid single body made of magnesium or a magnesium alloy, and comprises: a face including a hitting surface; a back on the opposite side of the face; a neck for connecting to a shaft at a position spaced apart from the center of the putter head toward a heel; and two or more insertion holes formed in the back and symmetrically distributed with respect to the center of the putter head, wherein a weight is replaceably inserted into each of the insertion holes, the putter head has a weight of half or less of a total weight of a weighted putter head with the weights inserted, and a gravity angle of the weighted putter head can have an angle of a heel hang state due to a weight deviation between a weight inserted into an insertion hole in a heel direction and a weight inserted into an insertion hole in a toe direction with respect to the neck. The putter head can provide a very flexible weight distribution design, a free gravity angle design according to the weight distribution design, and a large moment of inertia.

Description

magnesium alloy putter head

[0001] The present invention relates to a putter head made of a magnesium alloy material, and specifically, to a putter head that can provide improved putter performance by enabling a wide range of weight variation and free weight distribution design by manufacturing a lightweight putter head from a magnesium alloy material.

[0002] Magnesium alloys are lightweight metals with low density among available structural materials, and are gaining attention for their excellent properties such as high specific strength, machinability, and vibration absorption.

[0003] Recently, the use of these magnesium alloys is gradually increasing as they replace aluminum alloys in response to the demand for lighter transportation equipment to improve fuel efficiency. Additionally, their application is increasing in products such as mobile phones and laptops due to the demand for lightweight, compact, and excellent electromagnetic shielding properties.

[0004] The putter head strikes the golf ball through the golfer's swing motion. Ideally, if the golf ball were struck precisely at the center of mass or center of gravity (COM) of the putter head, the ball would travel in a direction consistent with the putter head's direction of motion; however, since this is a human movement, this is not the case in reality. Therefore, the moment of inertia (MOI) of the putter head is important in that it reduces deviations in the ball's trajectory caused by errors in the point of impact. The greater the moment of inertia, the larger the effective striking area becomes.

[0005] Various designs have been disclosed to increase the moment of inertia of putter heads. Mallet-type putter heads increase forgiveness for mishits by distributing mass through a design that extends backward. However, mallet putters have low design appeal, and the weight dragging backward makes it difficult to transfer impact power, resulting in shorter distance control. On the other hand, blade putters have the disadvantage of being difficult to control due to their narrow design.

[0006] Therefore, there is a market demand for putter heads capable of providing golf putters with superior performance, such as moment of inertia.

[0007] The present invention originated from this understanding, and the objective of the present invention is to provide a putter head that can provide improved putter performance by manufacturing a lightweight putter head from a magnesium alloy material, thereby enabling wide weight variation and free weight distribution design.

[0008] A putter head of a golf putter according to one embodiment of the present invention for achieving the above-mentioned objectives is a solid single body made of magnesium or a magnesium alloy, and the putter head includes a face including a striking surface, a back opposite the face, a neck for connecting to a shaft at a position spaced apart from the center of the putter head toward the heel, and two or more insertion holes formed in the back and symmetrically distributed with respect to the center of the putter head, wherein a weight is interchangeably inserted into each of the insertion holes, and the putter head has a weight less than or equal to half the total weight of the putter head with the weight inserted, and the gravity angle of the putter head may have a heel hang angle due to the weight difference between the weight inserted into the insertion hole in the heel direction and the weight inserted into the insertion hole in the toe direction with respect to the neck.

[0009] Here, the weight inserted into the insertion hole may be cylindrical, having a central axis perpendicular to the face of the putter head.

[0010] Here, the weight is fully inserted into the insertion hole, so that the exposed plane of the weight is in the same plane as or lower than the plane of the bag.

[0011] Here, the weight comprises a head portion and an accessory coupled to the head portion, and the accessory may be selected from a group of accessories having different dimensions or different materials according to the target weight of the weight.

[0012] Here, the group of accessories having different dimensions may include accessories that differ in the axial extension length of the accessories or differ in the inner diameter of the cavity empty inside the accessories.

[0013] In addition, the above different materials may include tungsten, carbon steel, and aluminum.

[0014] Meanwhile, the weight may include a seal ring that can be in close contact with the inner surface of the insertion hole.

[0015] Meanwhile, the putter head includes three or more insertion holes, and the inner diameter of the insertion holes may be larger as they are positioned further from the center of the putter head.

[0016] On the other hand, the distance between the two or more insertion holes is closer to the end of the toe or heel of the putter head than to the distance between the center of the putter head.

[0017] The putter head according to the present invention is lightweight and can provide a customized putter head with a weight distribution and gravity angle suitable for an individual's swing trajectory by combining it with various weights.

[0018] FIG. 1 is a diagram showing the trajectories of three representative swing strokes;

[0019] FIG. 2 is a drawing showing the configuration of a golf putter according to an embodiment of the present invention;

[0020] FIGS. 3 and 4 are drawings for defining the dimensions and orientation of a putter head;

[0021] FIG. 5 is a drawing showing the appearance of a putter head of a golf putter according to one embodiment of the present invention of FIG. 2;

[0022] FIG. 6 is a drawing showing the configuration of two types of putter heads according to a first embodiment of the present invention;

[0023] FIG. 7 is a drawing showing the configuration of a weight according to a first embodiment of the present invention;

[0024] FIG. 8 is a drawing showing the configuration of a weight according to a second embodiment of the present invention;

[0025] FIG. 9 is a drawing for explaining the difference between weights according to the first and second embodiments of the present invention;

[0026] FIG. 10 is a drawing showing variations of a weight according to an embodiment of the present invention;

[0027] FIG. 11 is a drawing showing the configuration of two types of putter heads according to a third embodiment of the present invention;

[0028] FIG. 12 is a drawing showing the configuration of three types of putter heads according to the fourth embodiment of the present invention;

[0029] FIG. 13 is a drawing showing the configuration of two types of putter heads according to the fifth embodiment of the present invention;

[0030] FIG. 14 is a drawing showing the configuration of two types of putter heads according to the sixth embodiment of the present invention;

[0031] FIG. 15 is a drawing showing the configuration of a putter head according to a seventh embodiment of the present invention; and

[0032] FIG. 16 is a diagram showing the putter heads distributed in quadrants representing functional differences of putter heads according to various embodiments of the present invention.

[0033] The present invention will be described in more detail below with reference to the drawings. Furthermore, in describing the present invention, detailed descriptions of related known functions or configurations are omitted if it is determined that such detailed descriptions would unnecessarily obscure the essence of the invention. Additionally, the terms described below are defined considering their functions in the present invention, and these may vary depending on the intentions or relationships of the user or operator. Therefore, their definitions should be based on the content throughout this specification.

[0034]

[0035] Figure 1 is a diagram showing the trajectories of three representative swing strokes.

[0036] Referring to Fig. 1, for a right-handed person, the golf putter (GP) moves from right to left in the diagram when making a stroke. However, the swing stroke trajectory may vary from person to person.

[0037] Trajectory A is a straight line. The putter head moves straight along a straight trajectory following the direction in which the golf ball will travel.

[0038] In a straight stroke of trajectory A, the putter head has a favorable moment of inertia when the gravity angle of the golf putter is 0˚. That is, when the putter head is in a neutral state and the angle of inertia is determined by the weight of the putter head relative to the shaft as an axis, the moment of inertia of the putter head is maximum when the longitudinal direction is parallel to the ground and the face is facing the ground.

[0039] Trajectory B is curved. The putter head moves along a curved trajectory with a radius of curvature centered on the player.

[0040] For a curved stroke of Trajectory B, the putter head possesses a favorable moment of inertia when the angle of gravity of the golf putter exceeds 0°. Furthermore, the greater the variation in the swing stroke trajectory—in other words, the greater the curvature of Trajectory B—the more advantageous a larger angle of gravity becomes. A large angle of gravity implies that the mass on the toe side of the putter head is relatively large, thereby reducing the outward deviation caused by mis-shots when striking the ball during an arcing stroke. In other words, for a player executing a curved stroke of Trajectory B, a putter head with a "toe hang," where the toe portion tilts downward, provides a favorable moment of inertia.

[0041] Trajectory C is a hybrid type. The putter head follows a curved trajectory when the player swings down after the backswing, but moves straight along a straight trajectory just before impacting the golf ball or during the release motion after impact.

[0042] In the hybrid stroke of trajectory C, since the ball is pushed straight during the release motion, it is advantageous for the putter head to have a relatively smaller angle of gravity compared to the case of trajectory B, which can compensate for the arched swing from the downswing to impact with the ball.

[0043] As an example, a face-balanced putter head is advantageous for a player with trajectory A, a toe-hang putter head with a gravity angle of 45˚ is advantageous for a player with trajectory B, and a toe-hang putter head with a gravity angle of 22.5˚ is advantageous for a player with trajectory C.

[0044]

[0045] FIG. 2 is a drawing showing the configuration of a golf putter according to one embodiment of the present invention.

[0046] Referring to FIG. 2, a golf putter comprises a putter head (100), a shaft (200), and a grip (not shown). The putter head (100) includes at least one weight (200). A detailed description of the putter head (100) and the weight (200), which can be designed in various ways, will be provided later.

[0047] Meanwhile, the putter head (100) of the golf putter according to the present invention is made of magnesium or a magnesium alloy. Magnesium is 1.738 g / cm³ 3 It has a density. Magnesium alloys that complement the hardness of magnesium can have a specific gravity of 1.82 as lightweight structural practical metals. The putter head (100) is manufactured as a single body made entirely of magnesium alloy. In addition, the putter head (100) is a solid single body that is not hollow and does not contain an insert inside. Magnesium or magnesium alloys have excellent vibration damping capabilities in addition to their light weight. The excellent vibration damping capability quickly dampens the shock waves transmitted to the golf club as a reaction when the magnesium putter head strikes the ball, thereby minimizing twisting of the putter head.

[0048] Furthermore, the shaft (200) of a golf putter according to one embodiment of the present invention is made of magnesium or a magnesium alloy. The lightness, elasticity, and vibration damping ability of the magnesium shaft can produce excellent golf putter performance, especially when combined with a magnesium putter head.

[0049]

[0050] Figures 3 and 4 are drawings for defining the dimensions and orientation of a putter head.

[0051] First, referring to FIG. 3, the putter head has a length (L), a height (H), and a width (W). Then, the length direction, height direction, and width direction are defined along the length (L), height (H), and width (W).

[0052] FIG. 4 is a top view of a putter head. The putter head has a front (F) which is the direction in which the ball is struck, a rear (B) which is the opposite direction, an inner or proximal direction (P) which is closer to the body relative to the player, and an outer or distal direction (D) which is farther from the body.

[0053]

[0054] As illustrated in FIGS. 2 through 4, the putter head according to the present invention may be of the blade type. The blade-type putter head is a rod-shaped form with a narrow width (W) and a long length (L). The shape of the putter head may comply with the authorized regulations of the USGA or R&A. For example, according to USGA equipment rules 4b(iii) for putters, in the address position, the heel-to-toe length of the putter head must be longer than the front-to-back length of the head. The heel-to-toe length must be 7 inches or 177.8 mm or less. The heel-to-toe length must be at least 2 / 3 of the front-to-back length of the head. The heel-to-toe length of the face must be at least half of the heel-to-toe length of the head. The distance from the sole to the top of the head, including any structure, must be 2.5 inches or 63.5 mm or less.

[0055]

[0056] FIG. 5 is a drawing showing the appearance of a putter head of a golf putter according to one embodiment of the present invention of FIG. 2.

[0057] FIG. 5(a) is a rear view of the back of the putter head viewed from the rear (B), FIG. 5(b) is a right side view of the heel of the putter head viewed from the proximal direction (P), FIG. 5(c) is a left side view of the toe of the putter head viewed from the distal direction (D), and FIG. 5(d) is a top view of the putter head viewed from above.

[0058]

[0059] FIG. 6 is a drawing showing the configuration of two types of putter heads according to the first embodiment of the present invention.

[0060] Referring to FIG. 6(a), the putter head (100) includes a back (110), a face (120), a neck (130), a heel (140), and a toe (150). The putter head (100) has a center (160) along its length. A guide line may be marked on the top of the putter head (100) to align the point of impact with the center (160) of the ball.

[0061] The face (120) is the part that includes the striking surface. The face (110) faces forward (F), and the striking surface that strikes the ball may be formed by a groove or combined with a separate plate. The back (110) is the part facing backward (B) on the opposite side of the face (110).

[0062] The neck (130) is a part for connecting to the shaft. The neck (130) may be a plumber neck as illustrated. A hosel (170) for connecting to the shaft may be inserted into the neck (130). The neck (130) is positioned spaced apart from the center (160) of the putter head (100) toward the heel (140).

[0063] The putter head (100) includes insertion holes formed in the bag (110). There are two or more insertion holes, and they are symmetrically distributed with respect to the center (160) of the putter head (100). The insertion holes can be seen in FIG. 2. A weight (200) is interchangeably inserted into each insertion hole.

[0064] There are multiple weights (200) corresponding to the number of insertion holes. The multiple weights (200-1, 200-2) may have the same or different weights. In the corresponding embodiment, the heel weight (200-1) of the putter head (100) is heavier than the toe weight (200-2) to balance the face.

[0065] A putter head weighted by an inserted weight (200) can have a total weight adjusted to suit the player. On average, the weight of a putter head used in a game is between 300g and 400g.

[0066] As previously explained, the putter head (100) is made of magnesium or a magnesium alloy. The magnesium alloy has a specific gravity of 1.82. Due to these lightweight characteristics, the putter head (100) accounts for less than half the total weight of the weighted putter head including the weight (200). For example, out of a total weight of 350g, the magnesium alloy putter head (100) may be 110g. Despite having dimensions that comply with conformity, the magnesium alloy putter head (100) can actually have a weight in the 100g range and has slightly different weights depending on the number of insertion holes formed. As the putter head (100) becomes lighter, the weight (200) has a wide range of weight variations. The weight (200) may be made of tungsten with a high specific gravity to have a dense weight.

[0067] Meanwhile, the weights (200-1, 200-2) inserted into the insertion hole have a central axis perpendicular to the face (120) of the putter head (100). This arrangement causes the movement of a mass parallel to the direction of the force transmitted to the ball when the face (120) strikes the ball, and by allowing the force due to the reaction to be transmitted in a constant direction along the axis of the weights, the putter head does not wobble and is given high forgiveness and moment of inertia for mis-shots.

[0068] Additionally, the weight (200-1, 200-2) is fully inserted into the insertion hole. The exposed plane of the weight (200-1, 200-2) may be in the same plane as or lower than the plane of the back (110). The weight (200-1, 200-2) fully inserted into the putter head can provide the appearance and handling feel of a blade putter that is integrated, compared to a mallet-type putter head that has a portion extending far behind the back of a conventional putter head.

[0069]

[0070] FIG. 6(b) illustrates an embodiment of a center neck blade putter head (100') in which the neck (130') is located at or adjacent to the center (160) of the putter head (100'). In the case of the center neck (130'), since the axis of rotation is located at the center of the putter head (100'), the angle of gravity is easily changed compared to a putter head having a plumber neck type or other types of skewed neck.

[0071]

[0072] The putter head (100) according to the present invention is capable of heel hang even though it has a neck (130) that is offset to one side. Specifically, the gravity angle of the increased putter head can be designed to have a heel hang angle by the weight difference between the weight (200-1) inserted into the insertion hole in the heel (140) direction and the weight (200-2) inserted into the insertion hole in the toe (150) direction relative to the neck (130).

[0073] Conventional putter heads made of steel or stainless steel are heavy due to the high specific gravity of the metal materials, so the weight at the toe end, which extends far from the neck or shaft, is inevitably heavier than the weight at the heel end, making toe hang unavoidable. However, the magnesium alloy putter head according to the present invention has a light weight, so the influence of the weight inserted into the insertion hole is significant.

[0074] Accordingly, in the embodiment of FIG. 6(a), the weight (200-1) can have the center of gravity of the putter head increased towards the short heel (140) rather than towards the toe (150) far from the neck (130) due to the large weight difference with the weight (200-2). In this case, a heel hang in which the heel (140) tilts downward toward the ground is possible. Even while maintaining the total weight of an average putter head of 300g to 400g, the putter head of the present invention can achieve a gravity angle of -90˚ with the toe (150) facing the sky due to the weight (200-1), which accounts for most of the total weight. Such a weight is described in more detail below.

[0075]

[0076] FIG. 7 is a drawing showing the configuration of a weight according to the first embodiment of the present invention.

[0077] First, referring to FIG. 7(a), the weight (700) includes a head portion (710) and a tail portion (720). The weight (700) is generally cylindrical.

[0078] The head portion (710) has a diameter corresponding to the insertion hole. The head portion (710) has a square groove (730) recessed in the upper surface. The square groove (730) allows the weight (700) to be attached to and detached from the putter head (100) by a wrench of the corresponding shape.

[0079] The head portion (710) has a circumferential groove (750) carved in the middle of the cylindrical body. The circumferential groove (750) can provide a space for a seal ring to be inserted to prevent dust or water from penetrating when inserted into the insertion hole of the putter head (100).

[0080] The tail portion (720) may have different lengths depending on the design weight of the weight (700). The tail portion (720) may have a smaller diameter than the head portion (710). The tail portion (720) facilitates easy introduction into the insertion hole due to its reduced diameter and helps the weight (700) to be inserted snugly into the part with the reduced inner diameter deep within the insertion hole, thereby allowing the weight to be stably positioned without shaking.

[0081] The tail portion (720) includes a fastening portion (760). The fastening portion (760) is configured to secure a weight (700) inside the insertion hole of the putter head (100), particularly the putter head (100). The fastening portion (760) may be a screw portion. In this case, the fastening portion (760) may be connected to a screw portion formed on the inner circumference in the middle of the insertion hole. Alternatively, the fastening portion (760) may be an elastic packing ring such as rubber. Due to the restoring elasticity and high frictional force of the compressible fastening portion (760), the weight (700) can be securely fixed inside the insertion hole of the putter head (100).

[0082] The tail portion (720) includes a reduction portion (740) recessed in the lower surface. The reduction portion (740) allows for a finer variation in weight of the weight (700), such as a deviation of 0.1g, which is difficult to achieve solely by adjusting the length (l) of the tail portion (720). The depth of mass reduction or the inner diameter of the reduction portion (740) can vary depending on the target weight.

[0083]

[0084] FIG. 7(b) illustrates a weight (700') having a heavier weight compared to FIG. 7(a). The tail portion (720') of the weight (700') extends further behind the head portion (710). The weight of the weight (700') increases by the increased length (l).

[0085]

[0086] FIG. 8 is a drawing showing the configuration of a weight according to a second embodiment of the present invention.

[0087] Referring to FIG. 8(a), the weight (800) includes a head portion (810) and an accessory (820) that combines with the head portion (810). That is, unlike the weight (700) of the first embodiment, which was a single piece, the weight (800) of the second embodiment is composed of an assembly.

[0088] To this end, the head portion (810) is a basic component. The head portion (810) has an insertion space (815) that can be combined with an accessory (820).

[0089] In the embodiment of FIG. 8(a), the accessory (820) is in the shape of a small, short pile or headless nail. This accessory (820) is fully inserted into the insertion space (815) of the head portion (810) to match the weight of the target weight (800).

[0090] Referring to FIG. 8(b), the weight (800') includes a head portion (810) which is a basic component and a long accessory (830) that is coupled thereto. The accessory (830) has an extension cylinder that extends axially in length (l) to match the weight and an axial portion (835) having a diameter corresponding to the inner diameter of the insertion space (815) of the head portion (810) to be coupled with the head portion (810).

[0091] Another feature of the weight according to the second embodiment is that the accessory (820; 830) can be made of a different material from the head (810).

[0092] For example, the head (810), which is a basic component, is made of tungsten. And, the component (830) for weight increase can be made of tungsten, carbon steel, or aluminum, etc. Thus, the component (830) can provide weight variation due to material properties or specific gravity as well as weight variation due to the dimensions themselves.

[0093] In conclusion, accessories can be manufactured with different dimensions and / or materials to have various weights. The accessories are selected from a group of accessories having different dimensions or different materials according to the target weight of the counterweight.

[0094]

[0095] FIG. 9 is a drawing for explaining the difference between weights according to the first and second embodiments of the present invention.

[0096] Referring to FIG. 9, a weight (700') of a first embodiment and a weight (800') of a second embodiment having the same dimensions are shown. Since the weight (700') of the first embodiment is integral and made of, for example, tungsten, the center of gravity of the weight (700') is located in the middle of the length direction of the weight (700') or near the middle.

[0097] On the other hand, in the second embodiment, the weight (800') has a higher specific gravity of the head part, such as tungsten, than the specific gravity of the accessory part, such as aluminum, and therefore the head part is heavier, so the center of gravity (c') of the weight (800') composed of different first and second materials in the second embodiment is located closer to the head part compared to the center of gravity (c) of the first embodiment.

[0098]

[0099] FIG. 10 is a drawing showing variations of a weight according to one embodiment of the present invention.

[0100] The weight can be designed to have various lengths (l) and various diameters (d). Based on FIG. 10, the diameter (d) of the weight varies along the vertical direction, and the length (l) of the weight varies along the horizontal direction. Such a diverse lineup of dimensions can provide the user with a wide range of customization freedoms.

[0101] The table below lists the mass, density, and volume of weights of different materials (tungsten (W), carbon steel (SM45C), aluminum (AL)) and dimensions (diameter (Dia.), length (Length)) according to one embodiment of the present invention.

[0102] MatDrawingDimensionMassgDensityg / ㎤Volume㎣Dia.LengthW911111.521.937.74319.31955.582911225.441.57619.32154.189911328.945.40919.32352.797911432.449.24219.32551.404911535.953.07519.32750.012911639.456.90819.32948.619911742.960.74119.33147.227911846.464.57519.33345.834911949.968.40819.33544.442931113.521.953.29119.32761.212931225.459.14119.33064.277931328.964.99019.33367.343931432.470.83919.33670.408931535.976.68819.33973.474931639.482.53719.34276.539931742.988.38619.34579.605931846.494.23619.34882.670931949.9100.08519.35185.736951115.521.971.49619.33704.443951225.479.78519.34133.958951328.988.07519.34563.473951432.496.36519.34992.987951535.9104.65419.35422.502951639.4112.94419.35852.016951742.9121.23419.36281.531951846.4129.52319.36711.046951949.9137.81319.37140.560SM45C 11.521.915.3517.851955.582 25.416.9107.852154.189 28.918.4697.852352.797 32.420.0297.852551.404 35.921.5887.852750.012 39.423.1477.852948.619 42.924.7067.853147.227 46.426.2657.853345.834 49.927.8247.853544.442 13.521.921.6767.852761.212 25.424.0557.853064.277 28.926.4347.853367.343 32.428.8137.853670.408 35.931.1927.853973.474 39.433.5717.854276.539 42.935.9507.854579.605 46.438.3297.854882.670 49.940.7087.855185.736 15.521.929.0807.853704.443 25.432.4527.854133.958 28.935.8237.854563.473 32.439.1957.854992.987 35.942.5677.855422.502 39.445.9387.855852.016 42.949.3107.856281.531 46.452.6827.856711.046 49.956.0537.857140.560AL 11.521.95.2802.71955.582 25.45.8162.72154.189 28.96.3532.72352.797 32.46.8892.72551.404 35.97.4252.72750.012 39.47.9612.72948.619 42.98.4982.73147.227 46.49.0342.73345.834 49.99.5702.73544.442 13.521.97.4552.72761.212 25.48.2742.73064.277 28.99.0922.73367.343 32.49.9102.73670.408 35.910.7282.73973.474 39.411.5472.74276.539 42.912.3652.74579.605 46.413.1832.74882.670 49.914.0012.75185.736 15.521.910.0022.73704.443 25.411.1622.74133.958 28.912.3212.74563.473 32.413.4812.74992.987 35.914.6412.75422.502 39.415.8002.75852.016 42.916.9602.76281.531 46.418.1202.76711.046 49.919.2802.77140.560.

[0103] FIG. 11 is a drawing showing the configuration of two types of putter heads according to a third embodiment of the present invention.

[0104] Referring to FIG. 11, the two putter heads (1100; 1100') have three insertion holes and thus each combine with three weights (2100-1, 2100-2, 2100-3; 2100-4, 2100-5, 2100-4).

[0105] In the putter head (1100) of FIG. 11(a), the neck (1130) and hosel (1170) are offset toward the heel, so in order to match the desired angle of gravity for face balance, the weight (2100-1) in the heel direction is heavy and the other two weights (2100-2, 2100-3) become lighter as they go toward the toe direction.

[0106] In the putter head (1100) of FIG. 11(b), the neck (1130') is positioned at the center, so to balance the face, the same weight (2100-4) is symmetrically placed in the insertion holes near the heel and toe, and a relatively lighter weight (2100-5) is inserted in the center insertion hole (2100-5) to match the total weight of the increased putter head.

[0107]

[0108] FIG. 12 is a drawing showing the configuration of three types of putter heads according to the fourth embodiment of the present invention.

[0109] Referring to Fig. 12, the three putter heads (1200; 1200'; 1200") have four insertion holes and thus combine with four weights.

[0110] The putter heads (1200; 1200'; 1200") of FIGS. 12(a) to 12(c) all have an arrangement of insertion holes or weights symmetrically distributed along the longitudinal direction with respect to the center of the putter head. However, the putter head (1200') has a form in which the insertion holes or weights are arranged at equal intervals. In contrast, the putter heads (1200; 1200") have an arrangement in which the insertion holes or weights are skewed toward the heel direction and the toe direction.

[0111] In other words, two or more insertion holes in the putter head are located closer to the end of the toe or heel than to the center of the putter head. The mass distribution concentrated at both longitudinal ends of the putter head by the weights results in a wider effective striking surface of the face and a more favorable moment of inertia compared to a putter head where the weights are evenly spaced.

[0112]

[0113] FIG. 13 is a drawing showing the configuration of two types of putter heads according to the fifth embodiment of the present invention.

[0114] Referring to FIG. 13, the two putter heads (1300; 1300') have five insertion holes and thus combine with five weights. In FIG. 13(a), two of the five insertion holes and weights of the putter head (1300) are positioned closer to the heel, two closer to the toe, and the remaining one in the center. In FIG. 13(b), the insertion holes and weights of the putter head (1300) are positioned at equal intervals along the longitudinal direction.

[0115] Here, the putter head of the fifth embodiment has insertion holes of different sizes. Accordingly, the diameters of the weights inserted into the insertion holes are also different. In the case of the embodiment of FIG. 13, among the five insertion holes, the two insertion holes closest to the heel and toe have large diameters, while the remaining three insertion holes have small diameters. Large diameter weights can be inserted into the large diameter insertion holes, and large diameter weights can have a heavier weight than small diameter weights. Therefore, this putter head can have an advantageous moment of inertia by being designed to allow the insertion of large, heavy weights at both longitudinal ends of the putter head. Furthermore, by having small diameters for the remaining three insertion holes, it is possible to design a fine weight distribution using small diameter weights within the remaining excess weight range after subtracting the weight of the two large diameter weights from the total weight.

[0116]

[0117] FIG. 14 is a drawing showing the configuration of two types of putter heads according to the sixth embodiment of the present invention.

[0118] Referring to FIG. 14, two putter heads (1400; 1400') according to the sixth embodiment have six insertion holes and thus combine with six weights. The putter head (1400) of FIG. 14(a) has three insertion holes each in a dense distribution in the heel direction and toe direction. The putter head (1400') of FIG. 14(b) has insertion holes arranged at equal intervals along the longitudinal direction.

[0119]

[0120] FIG. 15 is a drawing showing the configuration of a putter head according to the seventh embodiment of the present invention.

[0121] Referring to FIG. 15, the putter head (1500) according to the seventh embodiment has a total of seven insertion holes and thus combines with seven weights. The seven weights have different weights. In the illustrated embodiment, the two weights (2200-1) positioned closer to the heel on the inside of the body than the neck (1530) and hosel (1570), which serve as the axis of rotation of the angle of gravity, are the heaviest. The three weights (2200-2) positioned in the center are lighter than the two weights (2200-1). The two weights (2200-3) positioned closer to the toe on the outside of the body are the lightest. The putter head (1500), weighted by this exemplary weight distribution, can have an angle of gravity of face balance or toe hang suitable for the player's swing stroke.

[0122]

[0123]

[0124] * FIG. 16 is a diagram showing the putter heads distributed in quadrants representing functional differences of putter heads according to various embodiments of the present invention.

[0125] In the quadrant, the number of weights that can be inserted into the putter head decreases as you move toward the +x-axis and increases as you move toward the -x-axis. A putter head positioned along the +y-axis in the quadrant has a biased weight distribution skewed toward both ends of the heel and toe, while a putter head positioned along the -y-axis has a weight distribution in which the weights are evenly spaced at equal intervals along the length of the putter head.

[0126] A putter head oriented along the positive x-axis has a high moment of inertia (MOI) because most of the weight is concentrated at both ends of the head. Conversely, a putter head oriented along the negative x-axis has multiple weights evenly distributed across the head, but the large number of weights allows for precise weight control.

[0127] A putter head aligned with the +y axis, due to its weight distribution biased toward both ends, makes it easier for players with an arched swing stroke to adjust the desired toe hang angle. A putter head aligned with the -y axis, due to its even weight distribution, makes it easier for players with a straight swing stroke to align weights symmetrically with respect to the shaft's axis of rotation.

[0128]

[0129] Although preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above. It is understood that various modifications can be made by those skilled in the art without departing from the essence of the invention as claimed in the claims, and such modifications should not be understood individually from the technical spirit or perspective of the present invention.

Claims

1. Regarding the putter head of a golf putter, The above-mentioned putter head is a solid monolith made of magnesium or a magnesium alloy, and The above putter head is Face including the striking surface The back on the opposite side of the face above, A neck for connecting to a shaft at a position spaced from the center of the putter head toward the heel, and It includes two or more insertion holes formed in the bag and symmetrically distributed with respect to the center of the putter head, A weight is interchangeably inserted into each of the above insertion holes, and The above putter head has a weight less than half the total weight of the weighted putter head with the weight inserted, and The gravity angle of the above-mentioned increased putter head can have a heel hang angle due to the weight difference between the weight inserted in the heel-direction insertion hole and the weight inserted in the toe-direction insertion hole relative to the neck.

2. In Paragraph 1, A putter head having a cylindrical weight inserted into the above-mentioned insertion hole, having a central axis perpendicular to the face of the putter head.

3. In Paragraph 2, A putter head in which the weight is fully inserted into the insertion hole, and the exposed plane of the weight is in the same plane as or lower than the plane of the bag.

4. In Paragraph 3, The above-mentioned weight includes a head portion and an accessory that combines with the head portion, and The above accessory is a putter head selected according to the target weight of the weight from a group of accessories having different dimensions or different materials.

5. In Paragraph 4, A putter head comprising a group of accessories having different dimensions, wherein the accessories have different axial extension lengths or different inner diameters of hollow cavities within the accessories.

6. In Paragraph 5, The above different materials include tungsten, carbon steel, and aluminum, for a putter head.

7. In Paragraph 1, A putter head comprising a seal ring that can be in close contact with the inner surface of the insertion hole, wherein the weight above includes the seal ring.

8. In Paragraph 1, The above putter head includes three or more insertion holes, and A putter head in which the inner diameter of the insertion hole is larger the further it is positioned from the center of the putter head.

9. In Paragraph 1, A putter head in which the distance between the two or more insertion holes is closer to the end of the toe or heel of the putter head than to the distance between the center of the putter head.

Images