JP2007130203A - Golf putter head - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a putter head which permits putting with a stable stroke, exhibits a good balance during stroking, provides a good feeling of hitting a ball and permits the confirmation of the diameter and the deformation of the ball. <P>SOLUTION: The golf putter head is made by cutting a flat workpiece obtained by turning a round bar having a prescribed diameter and comprises a head body 10 made up of a thick-walled portion 13, one side of which forms a face side 11 to hit a golf ball and a flat plate portion 14 integrally formed by gradually decreasing the height behind the thick-walled portion 13. A circular through hole 15 having a diameter allowing a golf ball having a specified diameter to pass through while contacting the inside periphery in a fitting condition is formed in the flat plate portion 14. A slit 17 passing through the upper and lower sides within a range nearly corresponding to the circular through hole 15 is formed in the thick-walled portion 13. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a golf putter head, which has a sufficient mass for putting on a stable stroke, is excellent in balance at the time of stroke, and hit feeling when hitting a ball, and can confirm a ball diameter and deformation. The present invention relates to a golf putter head having a function.

  There are various shapes of putter heads for golf putters, and various mallet type models that can improve the stability of the stroke at the time of putting and the orientation of the face surface are widely used. Various types of putters have been proposed in which such a mallet-type head shape is used so that the golf ball in the cup after hole-in can be collected while standing. For example, various putters in which a part of a flat mallet type putter head is cut out so as to form a substantially C shape with a circular shape smaller than the diameter of a golf ball have been proposed (Patent Document 1, Patent Document 2, Patent) Reference 3). These putters can take out the golf ball in the cup by, for example, inserting the golf ball into the notch portion of the putter head while standing and lifting the putter head as it is.

  Thus, after putting in, these putters bend when the player on the green bows to the side of the cup to remove the ball from the cup or to pick up many practice balls on the practice green. The feature is that the troublesome work is unnecessary. However, depending on the shape of each notch, depending on the position of the ball in the cup, the ball may not be gripped well, or the part where the ball fits is part of the notch part of the putter head. If the ball falls off the putter head, the cup edge may be missing, or it may fall on the green and damage the green.

  In order to solve these problems, a putter head has also been developed in which a hole having a diameter slightly smaller than the diameter of the golf ball is provided in the putter head body so that the hole-in ball can be taken out from the cup more reliably. (Patent Document 4). Furthermore, the flat area of the putter head is increased to improve the stability of the putter head, and the inner peripheral surface of the flat part of the flat surface is slightly expanded from the bottom to hold the ball from the lower surface side of the putter head. A putter head provided with a through hole is also proposed (Patent Document 5).

  In order to catch the ball from the sole side and hold the ball on the inner peripheral surface of the circular hole of the putter head by a frictional action, all of the circular holes as ball holding portions formed in the putter heads of Patent Document 4 and Patent Document 5, A circular through hole having a slightly larger diameter on the sole surface than the upper surface side is provided. Therefore, these circular through-holes are set to have a minimum diameter that a normal golf ball cannot pass through.

  On the other hand, a golf ball as a certified ball has a strictly standardized diameter, and a measuring device approved by the British Golf Association (R & A) that the diameter φ is 42.67 mm (1.68 inches) or more. It needs to be confirmed. In addition, the Japan Golf Association (JGA) has established a provision for this. Thus, there is a guide putter with a ball gauge as a putter developed by paying attention to checking a standardized ball size (Patent Document 6). This putter has a substantially U-shape in plan view with an open part facing rearward, and can measure the diameter of the ball to be measured by using the separated part of the opposite side of the U-shape as a gauge. . At this time, this putter can pick up the golf ball in the cup or practice green while standing using this putter, as described above.

Japanese Utility Model Publication No. 49-45157. Japanese Utility Model Publication No. 51-114157. Japanese Utility Model Publication No. 56-63468. Japanese Unexamined Patent Publication No. 2000-271253. Japanese Patent No. 3167112. JP-A-7-255886.

  By the way, the dimensions of the golf ball are strictly controlled at the time of manufacture and inspected at the time of shipment, and those below the above-mentioned diameter are treated as defective products. On the other hand, various golf balls have been developed depending on the dimple shape, surface rubber and core material, configuration and the like, and there are various grades of products on the market. For this reason, there may be variations in the dimensions of the balls on the market, and there are various types of balls that have passed the inspection at the time of shipment, such as spherical and flat spherical. Are known. In such a case, the ball diameter can be easily verified by the putter with gauge shown in Patent Document 6 described above. However, since the putter shown in Patent Document 6 has a shape similar to that of a caliper, which is set to an allowable dimension in advance, it is disclosed in Patent Documents 4 and 5 in that the golf ball is gripped and taken out from the cup. It does not reach the performance of the putter head, and has the same defects as in Patent Documents 1, 2, and 3. Therefore, the object of the present invention is to solve the above-mentioned problems of the respective technologies, have a sufficient mass so that a stable stroke can be put, and balance at the time of stroke, hit feeling when hitting the ball Another object of the present invention is to provide a golf putter head that has a function of being able to check a ball diameter and deformation state and recover a holed-in golf ball while standing.

  In order to achieve the above object, the present invention is a golf putter head formed by cutting a flat workpiece obtained by turning a round bar having a predetermined diameter, and one surface constitutes a face surface that hits a golf ball. The head body is composed of a thick portion and a flat plate portion formed integrally with the rear portion of the thick portion by gradually reducing the height, and a golf ball having a specified diameter is fitted to the flat plate portion in an inner periphery. A through-hole having a diameter that can be penetrated while being in close contact with the surface is formed, and a slit that penetrates the upper and lower surfaces in a range substantially corresponding to the circular through-hole portion is formed in the thick portion.

  According to the present invention, it has a sufficient mass so that a pad can be put on with a stable stroke, has excellent balance at the time of stroke, and a hit feeling when hitting the ball. The golf ball can be collected while standing.

  Hereinafter, as the best mode for carrying out the golf putter head of the present invention, the following embodiments will be described with reference to the accompanying drawings.

FIG. 1 is a plan view of a putter head 10 of the present invention. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is an end view taken in the direction of arrows III-III in FIG. As shown in each drawing, the putter head 10 of the present invention has the following features.
(1) The putter head 10 has a substantially accurate symmetrical shape with respect to the II-II cross-sectional line corresponding to the center line C that can confirm the center position of the face surface 11 of the putter head 10 in plan view, except for the shaft mounting position 12. .
(2) The putter head 10 has a thick portion 13 having a height of 30 mm from the face surface 11 shown in FIG. 3 to the rear by a predetermined thickness (15 mm in this embodiment), and the rear end of the thick portion 13 A flat plate portion (height of 15 mm) that gradually decreases in width and height in a concave curved surface shape with a predetermined curvature in plan view from a neighboring position is integrally continuous, and is approximately 42.67 mm in the central position of the flat plate portion 14. A circular through hole 15 is formed so as to vertically penetrate the upper and lower surfaces of the putter head 10.
(3) The thick portion 13 between the face surface 11 and the circular through-hole is formed with a slit 17 penetrating the thick portion 13 having a length of 44 mm and a width of 5 mm in plan view as measured in this embodiment. Has been.

  As another feature, in order to prevent the sole surface 18 of the putter head 10 from being in surface contact with a green surface (not shown) during a stroke or a part of the sole surface 18 being caught, A sole side surface 18a corresponding to the lower ends on both sides of the face surface 11 and a tapered surface 19 are formed over a predetermined range of the heel portion.

  Hereinafter, the characteristics of the putter head 10 described above will be described in detail. The putter head 10 of the present embodiment is manufactured by cutting an extruded 90 mm round brass rod material as a flat workpiece having a predetermined thickness and cutting the flat workpiece into a predetermined shape of the putter head 10. It is a thing. For this reason, the outer peripheral surface 10a in plan view of the putter head 10 forms a part of a circular curved surface, thereby forming a smooth form. In addition, regarding the material, a putter head 10 using a difficult-to-cut material such as stainless steel can also be manufactured. Needless to say, the above numerical values other than the diameter dimension of the circular through-hole 15 can be appropriately changed within a preferable range in consideration of a minor change of the model.

  The putter head 10 has a shape in which a thick portion 13 whose one surface is a face surface 11 and a flat plate portion 14 at the rear are integrated through a portion where the width and thickness gradually change. A circular through hole 15 is formed. The putter of this embodiment is a low center of gravity putter where the center of gravity of the putter head 10 is located on the flat plate portion 14 side.

  Further, a circular through hole 15 having a diameter of 42.67 mm to +0.03 to 0.05 mm is formed in the flat plate portion 14 by high-precision drilling. At this time, the diameter of a normal official golf ball is standardized to be 42.67 mm or more. Accordingly, when the circular through hole 15 of the putter head 10 is pressed against the golf ball B, for example, the surface rubber material is somewhat elastically deformed and the golf ball B having a normal diameter can be easily fitted to the vicinity of the diameter portion. (See FIGS. 5 and 7). When the sole surface 18 of the putter head 10 is further pressed against a flat surface such as the ground, the golf ball comes out above the circular through hole 15 (see FIGS. 6 and 8). Thereby, the test of the diameter of the golf ball can be easily performed by the circular through hole 15. It can be determined that a golf ball having a diameter that can pass through the circular through-hole 15 relatively smoothly is a high-quality ball that is almost accurate to the standard. On the other hand, a golf ball that requires a certain force on the putter head 10 to pass through the circular through-hole 15 is 0.05 mm or more larger than a specified diameter. This means that the ball is manufactured relatively loosely. If the ball is in use, it can be seen that the ball has been deformed by use. Since such a deformed ball may be irregular in green rolling, it can be used as a judgment material that it is better to replace it after the next hole.

  The above-described slit 17 is formed in the thick face portion 13. The slit 17 has two functions. First, it is for maintaining the roundness of the circular through hole 15 described above. That is, this putter head 10 is a brass processed material having a shape in which the face thick portion 13 and the flat plate portion 14 are integrated as described above. For example, the putter is thermally expanded and contracted due to the influence of the outside air temperature. In such a state, due to the shape characteristics of the putter head 10, the circular through-hole 15 holds a perfect circle and is not easily deformed. Therefore, by providing the slit 17 on the thick portion 13 side, it is possible to form the boundary portion 20 in which the thickness of the metal portion when the circular through hole 15 is in contact with the thick portion 13 side is reduced. The presence of the boundary portion 20 between the circular through hole 15 and the circular through hole 15 can alleviate the amount of thermal deformation of the thick portion 13 and transmit it to the circular through hole 15, thereby maintaining the roundness of the circular through hole 15. Have.

  As a second function of the slit 17, the presence of the slit 17 allows the sweet spot 21 on the face surface 11 to be positioned within a thin plate (thickness 2 mm in the present embodiment) with two sides fixed. Therefore, the mass of the putter head 10 as a whole is large and the stability of the stroke can be achieved. In addition, when hitting the ball, the thin plate face 11 is hit, so that a soft feel is obtained. Moreover, the slit 17 located on the back side at the time of hit becomes a resonance part, and emits a clear resonance sound. Note that by slightly reducing the thickness of the thin plate to about 1.5 mm, it is possible to further emphasize the slight vibration transmitted to the hand when hit.

  Further, in the putter head 10 of this embodiment, the loft angle of the face surface 11 is set to 3 ° in order to improve the rolling of the ball (see FIG. 2). This angle can be set as appropriate, but the finished accuracy with respect to the set angle is realized only by cutting as in the present invention, and high-accuracy machining that cannot be obtained by machining forged products or the like. Is possible. In addition, the narrow V-shaped groove 22 along the center line C extends from the face surface 11 to the putter head 10 so that the center position of the sweet spot on the face surface 11 and the directionality of the putter can be confirmed in the same manner as the normal putter head 10. It is formed in a straight line at a portion excluding the slit 17 and the circular through hole 15 from the rear end portion.

  FIG. 3 shows an example of the cut-out pattern 23 provided on the face surface 11. By finely milling the face surface 11 in this way, the friction between the face surface 11 and the ball is slightly increased. Can prevent the ball from slipping inadvertently upon a hit. Also, there is an effect of making the face surface 11 scratch inconspicuous.

  FIG. 4 is a bottom view of the putter head 10 as seen from the sole surface 18. As shown in FIGS. 3 and 4, both ends of the face surface 11 and the heel portion have tapered surfaces 19 in a predetermined range. Thereby, it is possible to prevent the sole surface 18 and the green from being caught during a stroke during putting. Further, since the peripheral edge of the circular through hole 15 is chamfered 24 with a slight width, it is possible to prevent the ball surface from being scratched when the ball is fitted into the circular through hole 15.

  5 and 7 are explanatory views schematically showing a state in which the ball B that has been holed in is gripped by the circular through hole 15 of the putter head 10 in the cup 2. As shown in FIG. 7, the ball B is easily formed into the circular through hole 15 by pressing the ball B located at the bottom of the cup 2 in the downward arrow direction in the vicinity of the circular through hole 15 of the sole surface 18 of the putter head 10. Fit into. At this time, due to the elastic deformation of the surface rubber material of the ball B, the ball B fits firmly into the inner peripheral surface of the circular through-hole 15 and when the putter is lifted, the ball B is taken out from the cup 2 together.

  6 and 8 are explanatory views schematically showing a state in which the ball B is pushed out from a state in which the ball B is gripped by the putter head 10. When the ball B is taken out from the cup 2 (FIG. 7) with the putter head 10, the ball B is held and moved to the rough around the green, and the putter head 10 is lightly pressed on the ground or the like 3 in the downward arrow direction. The diameter of the ball B passes through the circular through hole 15 and is lightly placed on the head upper surface side of the circular through hole 15 of the putter head 10. Thus, the ball B placed on the putter head 10 can be easily taken.

The top view of the putter head of this invention. Sectional drawing shown along the II-II sectional line of FIG. 3 is an end view of the face surface shown in the direction of arrows III-III in FIG. The bottom view of a putter head. The perspective view which showed the state which the ball fitted in the circular through-hole of the putter head from the sole side. The perspective view which showed the state which the ball fitted into the circular through-hole of the putter head from the sole side, and also slipped out to the upper part of the circular through-hole. An explanatory view schematically showing a state in which a ball is fitted in a circular through hole of a putter head in a cup. Explanatory drawing which showed typically the state which pushed out so that the ball fitted from the sole side to the circular through-hole of a putter head might come out to the upper part of a circular through-hole.

Explanation of symbols

2 Cup 10 Putter head 11 Face surface 13 Thick portion 14 Flat portion 15 Circular through-hole 17 Slit 18 Sole surface 19 Tapered surface 20 Boundary portion B Golf ball (ball)
C center line

Claims (1)

  A golf putter head formed by cutting a flat workpiece obtained by turning a round bar having a predetermined diameter, and a thick part constituting a face surface on which one surface hits a golf ball, and a rear part of the thick part The head body is composed of a flat plate portion integrally formed with a gradually reduced height, and a golf ball having a specified diameter is fitted to the flat plate portion and has a diameter that can be penetrated while closely contacting the inner peripheral surface. A golf putter head characterized in that a through hole is formed, and a slit that penetrates through the upper and lower surfaces in a range substantially corresponding to the circular through hole portion is formed in the thick part.

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