JP5810617B2 - Iron head - Google Patents

Description

  The present invention relates to an iron head of an iron type golf club, and more particularly to an iron head having a cavity part at the upper part of the rear surface, a bulging part at the lower part of the rear surface, and a concave part on the upper surface of the bulging part.

  The iron-type golf club includes a shaft and an iron head attached to the tip of the shaft, and is configured to hit a ball on the face surface of the iron head. The shaft is fixed by being inserted into the hosel hole of the iron head and attached to the iron head. The side on which the hosel hole of the iron head is formed is called a heel, and the opposite side, that is, the tip side of the iron head is called a toe. The side of the iron head facing the ground is called the sole. A number of grooves extending in the toe-heel direction, that is, score lines are provided on the face surface of the iron head at intervals in the vertical direction.

  Patent Document 1 describes an iron head having a cavity portion at the upper portion of the rear surface, a bulging portion at the lower portion of the rear surface, and a concave portion recessed toward the sole surface on the upper surface of the bulging portion. 13 to 15 of Patent Document 1 show that the concave portion is provided separately on the heel side and the toe side.

JP2010-17475

  In the iron head disclosed in Patent Document 1, when a high specific gravity weight is provided on the sole surface in order to lower the center of gravity of the head, the weight may interfere with the recess. Further, when the thickness of the cavity portion is reduced, there is a risk that vibration when the ball is hit increases.

  According to the present invention, in an iron head having a cavity part at the upper part of the rear surface, a bulging part at the lower part of the rear surface, and a concave part on the upper surface of the bulging part, the weight can be installed without interfering with the concave part. An object is to provide a possible iron head.

  Another object of the present invention is to provide an iron head that can suppress vibration when a ball is hit.

The iron head according to the first aspect of the present invention has a cavity portion at the upper portion of the rear surface, a bulging portion at the lower portion of the rear surface, and a concave portion that is recessed from the upper surface of the bulging portion to the sole side. In the iron head, the recess is provided separately on the toe side and the heel side, the first recess on the heel side is gradually deeper toward the heel side, and the second recess on the toe side is on the toe side. towards and are gradually deeper, and the deepest portion of the deepest and the second recess of the first recess is spaced above 35 mm, and weight is provided near the middle of the toe-heel direction of the sole surface The deepest portion of the first recess is located on the heel side from the midpoint of the first recess in the toe / heel direction, and the deepest portion of the second recess is the midpoint of the second recess in the toe / heel direction which is characterized in that located more toe side A.

  In the iron head of the second aspect, the face plate has a thickness of 1.5 to 3.5 mm in the cavity portion, and a rib extending in the toe-heel direction is provided on the upper edge of the cavity portion. .

  In the iron head according to the third aspect, the length of the rib in the toe-heel direction is 10 to 43 mm.

  In the iron head of the fourth aspect, the depth of the deepest portion of the first concave portion and the second concave portion from the upper surface of the bulging portion is 5 to 25 mm.

  In the iron head according to the fifth aspect, at least a part of the upper portion of the weight is positioned higher than a line segment connecting the deepest portion of the first recess and the deepest portion of the second recess.

  In the iron head according to the sixth aspect, the cavity portion extends from the rear surface of the bulge portion between the toe side end portion of the first recess and the heel side end portion of the second recess in the upper surface of the bulge portion. A recess reaching up to is provided.

  In the first aspect of the present invention, the iron head has a cavity part at the upper part of the rear surface and is provided with a first concave part and a second concave part on the toe side and the heel side of the upper surface of the bulging part, respectively, and the total weight of the iron head Can be reduced. Therefore, the iron head can be enlarged without increasing the overall weight of the iron head. Further, the iron head sweet area can be widened by increasing the toe side and heel side partial weights of the iron head without increasing the total weight of the iron head. In the iron head according to the first aspect, since no concave portion is provided on the back side of the center portion, a strong shot feeling can be obtained when the ball is hit at the intermediate portion.

  Further, in the first aspect, since the deepest portion of the first recess and the deepest portion of the second recess are separated by 35 mm or more, even if the thickness of the weight disposed below between the recesses is increased, Interference between the weight and the recess is prevented.

  In the second and third aspects, even when the face plate thickness in the cavity portion is reduced, the vibration at the time of ball hit is suppressed by providing the rib.

  According to the 4th aspect, since the deepest part of the 1st and 2nd recessed part is deep enough, the weight of an iron head is reduced.

It is a rear view of the iron head concerning an embodiment. It is the perspective view seen from the rear upper part of the iron head of FIG. It is sectional drawing which follows the III-III line of FIG. It is sectional drawing which follows the IV-IV line of FIG. It is a rear view of the iron head concerning another embodiment. It is a rear view of the iron head concerning another embodiment. It is a rear view of the iron head concerning another embodiment.

  Hereinafter, an iron head 10 according to an embodiment will be described with reference to the drawings. The iron head 10 has a face surface 11 for hitting a ball, a toe side 12, a heel side 13, a sole surface 14, and a hosel 15 for connecting a shaft. The iron head 10 further includes a cavity portion 16 provided at the upper portion of the rear surface, a bulging portion 17 that bulges rearward at the lower portion of the rear surface, and a bulging portion 17 so as to be recessed from the upper surface 16b of the bulging portion 17. A first recess 18 provided on the heel side 13, a second recess 19 provided on the toe side, and a weight 20 provided on the sole surface 14 are provided.

The cavity portion 16 extends from the bulging portion upper surface 16b to the vicinity of the upper edge of the head. The distance between the upper end of the cavity portion 16 and the upper end of the head (H ₂ − (H ₁ + H ₃ ) in FIG. ₃ ) is preferably about ₃ to 12 mm, particularly about _{3 to} 7 mm. The cavity portion 16 extends from the toe side 12 to the heel side 13. The face plate thickness in the cavity portion 16 is preferably about 1.5 to 3.5 mm, particularly about 2 to 3 mm. The maximum vertical length H ₁ (FIG. 3) parallel to the face surface 11 of the cavity 16 near the toe side 12 is 20 to 50 of the maximum vertical length H ₂ (FIG. 3) of the face surface 11. %, Especially about 25 to 40% is suitable.

On the lower side of the cavity portion 16, a bulging portion 17 protrudes rearward of the head. The upper surface 16 b of the bulging portion 17 is substantially perpendicular to the face surface 11. The maximum vertical length H ₃ (FIG. 3) in the direction parallel to the face surface 11 of the bulging portion 17 in the vicinity of the toe side 12 is 48 to 78% of the maximum vertical length H ₂ of the face surface, particularly 58 to 73. % Is preferred. The preferable ratio between the maximum vertical length of the face surface 11 parallel to the face surface 11 on the heel side 13 and the maximum vertical length of the face surface is the same.

  The recessed portions 18 and 19 are recessed from the bulging portion upper surface 16 b toward the sole surface 14. The recesses 18 and 19 are provided symmetrically with respect to an intermediate point in the toe-heel direction of the bulging portion upper surface 16b. The recesses 18 and 19 become deeper as they are separated from the intermediate point. The recess 18 is deepest in the vicinity of the heel side, and the recess 19 is deepest in the vicinity of the toe side. The depth (depth from the upper surface 16b of the bulging portion) D of the deepest portions 18b and 19b of the recesses 18 and 19 shown in FIG. The distance from the deepest portion 18b of the concave portion 18 to the deepest portion 19b of the concave portion 19 is preferably about 15 to 60 mm, particularly about 40 to 60 mm.

The lengths W ₁ and W ₂ of the recesses 18 and 19 in the toe-heel direction are each preferably about 10 to 20 mm, particularly about 15 to 20 mm. The recesses 18 and 19 are not provided near the midpoint of the bulging portion upper surface 16b in the toe-heel direction, and the recesses 18 and 19 are separated from each other by a predetermined distance on the bulging portion upper surface 16b. The separation distance, that is, the distance between the toe side end of the recess 18 and the heel side end of the recess 19 in the bulged portion upper surface 16b is preferably 15 mm or less, particularly about 10 mm or less.

  Examples of the iron or iron-based alloy constituting the iron head 10 include stainless steel (SUS630, 303, 304, etc.), low carbon steel (S20C, S15C, S25C, etc.), maraging steel, and the like. Their specific gravity is about 7.8-8.2. The iron head may be a forged product or a cast product.

  The weight 20 is made of a high specific gravity material having a specific gravity of about 10 to 15 such as tungsten or a tungsten alloy. The weight 20 is press-fitted into a recessed hole provided in the sole surface 14. The length of the weight 20 in the toe-heel direction is preferably about 5 to 50 mm, particularly about 20 to 40 mm. The thickness t (FIG. 3) of the weight 20 is preferably about 5 to 20 mm, particularly about 5 to 10 mm. The width of the weight 20 in the flying ball direction is preferably about 5 to 20 mm, particularly about 10 to 20 mm.

A rib 22 extending in the toe-heel direction is provided near the middle of the upper edge of the cavity portion 16 in the toe-heel direction. The rib 22 is continuous with the peripheral wall surface of the upper end portion of the cavity portion 16. The length L ₁ (FIG. 4) in the toe-heel direction along the upper edge of the head on the upper side of the rib 22 is preferably about 10 to 43 mm, particularly about 15 to 30 mm, and the length L ₂ on the lower side of the rib 22. (FIG. 4) is preferably 50-100%, especially about 70-80% of _{L 1.} The vertical width L ₃ (FIG. 3) of the rib 22 is preferably about 2 to 10 mm, particularly about 3 to 7 mm. The thickness L ₄ (FIG. 4) on the upper side of the rib 22 is preferably about 0.5 to 4 mm, particularly about 1 to 2 mm. Rib 22 is preferably gradually thickness as the lower side is smaller, it is preferable that the thickness at the lower side is 30% to 80% particularly about 50% to 75% of the upper side of the thick L _4.

  The thus configured iron head 10 is provided with the concave portions 18 and 19 on the toe side and the heel side of the bulging portion upper surface 16b, respectively, and the weight of the iron head can be reduced by the amount of the concave portions 18 and 19. Therefore, the iron head can be enlarged without increasing the overall weight of the iron head 10. Further, the weight on the toe side and the heel side of the iron head 10 can be increased without increasing the overall weight of the iron head 10, and the sweet area of the iron head 10 can be widened. In the iron head 10, since the concave portions 18 and 19 are not provided near the middle of the bulging portion upper surface 16b in the toe-heel direction, the shot feeling when the ball is hit at the center portion M is strong.

  In the iron head 10, the recesses 18 and 19 are shallower toward the intermediate side in the toe-heel direction of the head. Therefore, there is no interference between the weight 20 and the recesses 18 and 19, and the degree of freedom in designing the head, such as increasing the thickness t of the weight 20, is great.

  Further, in the iron head 10, since the rib 22 is provided on the upper edge near the middle of the cavity portion 16 in the toe-heel direction, the rigidity near the upper edge is increased, and vibration when the ball is hit is suppressed. , The feel is good.

<Another embodiment>
In the above embodiment, the recesses 18 and 19 are separated from each other, but the toe side end of the recess 18 and the heel side end of the recess 19 may be in contact like the iron head 10A of FIG. . That is, the distance between the recesses 18 and 19 may be zero. According to the iron head 10A, an effect that the hit feeling when the ball is hit at the center portion M becomes strong can be obtained. The other configuration of the iron head 10A shown in FIG. 5 is the same as that of the iron head 10 shown in FIGS. 1 to 4, and the same reference numerals denote the same parts.

  In the iron head 10B of FIG. 6, the toe side end of the recess 18 and the heel side end of the recess 19 are spaced apart, but a recess 25 that is shallower than the recesses 18 and 19 is provided between them. Yes. In this embodiment, the recessed portion 25 has a groove shape that is curved in an arc shape, but may have another shape such as a square groove shape. The recessed portion 25 is provided so as to reach the cavity portion 16 from the back surface of the bulging portion 17. The width in the toe-heel direction of the recessed portion 25 on the upper surface 16b of the bulging portion is preferably about 5 to 15 mm, particularly about 8 to 12 mm. The depth of the recessed portion 25 is preferably about 1 to 10 mm, particularly about 3 to 6 mm. Other configurations of the iron head 10B are the same as those of the iron head 10 shown in FIGS. 1 to 4, and the same reference numerals denote the same parts.

  In the iron head 10C of FIG. 7, the deepest portions 18b and 19b of the recesses 18 and 19 are deeper than the iron head 10 of FIGS. Further, the thickness of the weight 20 is larger than that of the iron head 10. The upper portion of the weight 20 is positioned higher than the line segment connecting the deepest portions 18b and 19b of the concave portions 18 and 19. Other configurations of the iron head 10C are the same as those of the iron head 10 shown in FIGS. 1 to 4, and the same reference numerals denote the same parts.

  In the iron head 10 </ b> C, the weight 20 having a higher specific gravity than the head main body is also present between the recesses 18 and 19, so that the effect of lowering the center of gravity can be achieved.

10, 10A, 10B, 10C Iron head 11 Face surface 12 Toe side 13 Heel side 14 Sole surface 15 Hosel 16 Cavity portion 16b Upper surface of expanded portion 17 Expanded portion 18, 19 Recessed portion 20 Weight 22 Rib

Claims (7)

A cavity is provided at the top of the rear surface,
A bulge is provided at the bottom of the rear surface,
In the iron head provided with a recess so as to be recessed from the upper surface of the bulging portion to the sole side,
The concave portion is provided separately on the toe side and the heel side, the first concave portion on the heel side is gradually deeper toward the heel side, and the second concave portion on the toe side is gradually increased toward the toe side. Deepened,
The deepest part of the first recess and the deepest part of the second recess are separated by 35 mm or more,
A weight is provided near the middle of the toe and heel direction of the sole surface ,
The deepest portion of the first recess is located on the heel side from the midpoint of the first recess in the toe-heel direction,
The deepest portion of the second recess is located on the toe side from the middle point of the second recess in the toe-heel direction . In Claim 1, the face plate thickness in the cavity portion is 1.5 to 3.5 mm,
An iron head, wherein a rib extending in a toe-heel direction is provided on an upper edge of the cavity portion.   The iron head according to claim 2, wherein a length of the rib in a toe-heel direction is 10 to 43 mm.   The iron head according to any one of claims 1 to 3, wherein a depth of a deepest portion of the first concave portion and the second concave portion from the upper surface of the bulging portion is 5 to 25 mm.   5. The iron head according to claim 4, wherein at least a part of the upper portion of the weight is positioned higher than a line segment connecting the deepest portion of the first recess and the deepest portion of the second recess. .   6. The bulging part rear surface according to claim 1, wherein the bulging part rear surface is between the toe side end part of the first concave part and the heel side end part of the second concave part among the bulging part upper surface. An iron head characterized in that a concave portion reaching the cavity portion is provided. The iron head according to any one of claims 1 to 6, wherein the deepest portion of the first recess is located in the vicinity of the heel side, and the deepest portion of the second recess is located in the vicinity of the toe side.

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