JP5836211B2 - Iron golf club and iron golf club set - Google Patents

Description

  The present invention relates to an iron golf club and an iron golf club set including a plurality of iron golf clubs.

  As an iron golf club according to the prior art, one described in JP 2008-246085 A (Patent Document 1) is known. The iron golf club disclosed in this document is a head body in which a cavity communicating with the outside is formed through openings formed on both the front surface and the back surface, and the opening formed on the front surface is plate-shaped. The head main body is covered with the face portion.

JP 2008-246085 A

  In an iron golf club, generally, the face part height increases (decreases) as the count decreases (increases). Therefore, in the iron golf club disclosed in the above document, a low count iron golf club has a high resilience performance by including a face portion that is easy to bend compared to a high count iron golf club. On the other hand, a high count iron golf club has a low resilience performance by including a face portion that is less likely to bend than a low count iron golf club. In this way, variation in resilience performance occurs between counts.

  Therefore, according to various embodiments of the present invention, an iron golf club is provided that suppresses variation in resilience performance between counts.

An iron golf club set according to one aspect of the present invention is an iron golf club set including a plurality of iron golf clubs, and each iron golf club extends from one end to the other end to form a bottom surface. A sole part, a plate-like face part extending opposite to the sole part, the sole part and the face part, and extending along the sole part and the face part, the sole part and the face part The iron golf club set includes a head having a coupling portion that couples to the face portion, and a size at a reference position of the coupling portion of a certain iron golf club included in the iron golf club set. The size of the connecting portion of another iron golf club is different from the size at the reference position.
A golf club according to one aspect of the present invention is one iron golf club included in the iron golf club set.
A golf club according to another aspect of the present invention includes a sole portion that extends from one end toward the other end to form a bottom surface, a plate-like face portion that extends opposite the sole portion, and the sole portion and the face A head having a plate-like coupling portion that is disposed between the sole portion and the face portion and that couples the sole portion and the face portion, and a rod-like shape attached to the head The size of the coupling portion at the reference position is determined based on the angle formed by the face portion with respect to the central axis of the shaft.

  Various embodiments of the present invention can provide an iron golf club that suppresses variation in resilience performance between counts.

FIG. 1 is a front view showing a configuration of an iron golf club according to an embodiment of the present invention. FIG. 2 is a front view showing the configuration of the head 100 shown in FIG. FIG. 3 is a side view showing the head 100 shown in FIG. 4 is a rear view showing the head 100 shown in FIG. FIG. 5 is a cross-sectional view of the head 100 taken along the line V-V ′ of FIG. 2.

  Hereinafter, various embodiments will be described with reference to the drawings as appropriate. In addition, the same referential mark is attached | subjected to the component which is common in drawing. Further, the drawings are not necessarily shown to the same scale for convenience.

  FIG. 1 is a front view showing a configuration of an iron golf club according to an embodiment of the present invention. As shown in FIG. 1, an iron golf club 10 mainly includes a grip G, a shaft S coupled to the grip G, and a golf club head coupled to the shaft S via a hosel HZ (hereinafter simply referred to as “head”). And 100).

  FIG. 2 is a front view showing the configuration of the head 100 shown in FIG. FIG. 3 is a side view showing the head 100 shown in FIG. 4 is a rear view showing the head 100 shown in FIG. FIG. 5 is a cross-sectional view of the head 100 taken along the line V-V ′ of FIG. 2.

  As shown in FIG. 4 when the head 100 is viewed from the back, the head 100 includes a heel portion 110 having a hosel HZ that accommodates and fixes the shaft S, a toe portion 120 that extends opposite the heel portion 110, It extends between the heel part 110 and the toe part 120, connects the heel part 110 and the toe part 120, and forms a top surface 130 that faces the top part 130 between the heel part 110 and the toe part 120. And a sole portion 140 that extends below the top portion 130 and connects the heel portion 110 and the toe portion 120 to form a bottom surface. The heel part 110, the toe part 120, the top part 130, and the sole part 140 are joined so as to form a substantially square shape as a whole.

  The heel part 110, the toe part 120, the top part 130, and the sole part 140 can be formed to have an arbitrary shape such as a bar shape or a plate shape. In the present embodiment, as an example, the toe portion 120 is formed to have a height higher than the heel portion 110, the top portion 130 is curved and extends so as to protrude upward, and the heel portion 140 is It is curved and extends so as to be convex.

  As shown in FIGS. 2 and 3, the head 100 further includes a plate-like face portion 150 extending between the heel portion 110 and the toe portion 120 so as to face the top portion 130 and the sole portion 140.

  As shown in FIGS. 4 and 5, the head 100 has a cavity 160 therein. Specifically, the head 100 has a cavity 160 that is a region surrounded by the inner surfaces of the heel part 110, the toe part 120, the top part 130, the sole part 140, and the face part 150. The cavity 160 is an opening 170 formed on the back surface of the head 100, and the outside of the head 100 is interposed through the opening 170 surrounded by the heel part 110, the toe part 120, the top part 130, and the sole part 140. Communicated with.

As shown in FIG. 5, the face portion 150 formed in a plate shape is opposed to the top portion 130 and the sole portion 140 and extends along the top portion 130 and the sole portion 140.
The top portion 130 has a front surface 132 that extends to face the face portion 150. On the front surface 132, a plate-like (thin-walled) upper coupling portion 134 protruding from the front surface 132 toward the face portion 150 is formed. The upper coupling portion 134 extends in an arc shape along the inner surface of the front surface 132 and the face portion 150 between the front surface 132 of the top portion 130 and the inner surface of the face portion 150, so that the front surface 132 of the top portion 130 and the face portion The inner surface of 150 is connected. The upper coupling portion 134 can be regarded as being provided as part of the top portion 130, can be regarded as being provided as part of the face portion 150, and the top portion 130. Also, it can be regarded as a separate body from the face portion 150.
Similarly, the sole portion 140 has a front surface 142 that extends to face the face portion 150. A plate-like (thin-walled) lower coupling portion 144 that protrudes from the front surface 142 toward the face portion 150 is formed on the front surface 142. The lower coupling portion 144 extends in an arc shape along the inner surface of the front surface 142 and the face portion 150 between the front surface 142 of the sole portion 140 and the inner surface of the face portion 150, thereby forming the front surface 142 and the face portion of the sole portion 140. The inner surface of 150 is connected. The lower coupling portion 144 extends to face the upper coupling portion 134 described above. The lower coupling portion 144 can be regarded as being provided as a part of the sole portion 140, can be regarded as being provided as a portion of the face portion 150, and the sole portion 140. Also, it can be regarded as a separate body from the face portion 150.

  In the head 100 having the above-described configuration, for example, the heel portion 110, the toe portion 120, the top portion 130, the sole portion 140, the upper coupling portion 134, and the lower coupling portion 144 are integrally formed by casting, After the main body is formed, the face portion 150 is welded to the head main body (the face portion 150, the upper joint portion 134, the lower joint portion 144, the heel portion 110, and the toe portion 120 are welded). It is something that can be done. As a material constituting the head body, for example, a metal material such as a titanium alloy, stainless steel, or carbon steel can be used. Moreover, as a material which comprises the face part 150, metal materials, such as a titanium alloy, stainless steel, carbon steel, and maraging steel, can be used, for example.

In the present embodiment, the size of the lower coupling portion 144 (and / or the upper coupling portion 134) is set to be different between an iron golf club having a certain number and an iron golf club having another number. Specifically, first, the significance of size will be described.
As shown in FIG. 5, the lower coupling portion 144 has a first thickness A along the vertical direction (that is, the direction from the sole portion 140 toward the top portion 130). The lower coupling portion 144 has a second thickness B along the direction from the sole portion 140 toward the face portion 150. The first thickness A and the second thickness B specify the size of the lower coupling portion 144.

  The lower connecting portion 144 is a member that connects the face portion 150 and the sole portion 140 integrally and continuously. Therefore, in order for the face part 150 to bend, the lower joint part 144 also needs to be bent together. Therefore, the lower coupling portion 144 having a small rigidity allows the face portion 150 to bend, so that the bend of the face portion 150 can be increased. On the contrary, the lower coupling portion 144 having high rigidity inhibits the face portion 150 from being bent, so that the bending of the face portion 150 can be reduced. In other words, if the first thickness A of the lower coupling portion 144 is reduced (increased), the rigidity of the lower coupling portion 144 is reduced (increased), so that the deflection of the face portion 150 can be increased (decreased). . Similarly, if the second thickness B of the lower coupling portion 144 is increased (decreased), the rigidity of the lower coupling portion 144 is decreased (increased), so that the deflection of the face portion 150 can be increased (decreased).

  In the present embodiment, as an example, the lower coupling portion 144 has a substantially constant size (i.e., in a region corresponding to the width (width L in FIG. 1) where the score line 152 is provided in the face portion 150. It may have a constant first thickness A and a substantially constant second thickness B). In the present embodiment, a position where a substantially constant size is maintained in the lower coupling portion 144 is referred to as a “reference position” for convenience. The reference position of the lower coupling portion 144 can be arbitrarily set.

Next, how the first thickness A and the second thickness B of the lower coupling portion 144 can be set for each count will be further described with reference to Table 1. Table 1 is a table | surface which shows an example of the setting method of the 1st thickness in the lower connection part of the iron golf club which concerns on one Embodiment of this invention, and a 2nd thickness.

In the specific example shown in Table 1, the first thickness A is the same between a plurality of counts (between No. 4 and No. 5, between No. 6 and No. 7, and between No. 8 and No. 9). However, the first thickness A can be set so as to increase as the count decreases (that is, as the loft increases). Thereby, since the lower golf club having a lower count (high count) has a higher rigidity (small rigidity), the lower coupling portion 144 has a low resilience performance (high resilience performance). Here, the "loft", the plane face portion 150 is formed (outer or inner surface) refers to the angle θ, which forms with respect to the central axis A _S of the shaft S (see FIG. 3). In Table 1, as an example, a general loft is assigned to each count.

  On the other hand, the second thickness B is the same between a plurality of counts (between No. 4 and No. 5, between No. 6 and No. 8, and between No. 9 and PW). The thickness B can be set so as to decrease as the count decreases (that is, as the loft increases). Thereby, since the lower golf club having a lower count (high count) has a higher rigidity (small rigidity), the lower coupling portion 144 has a low resilience performance (high resilience performance).

  The relationship between the count shown in Table 1 and the first thickness A and the second thickness B is as follows: i) When the loft θ is in the range of 15 ° to less than 25 °, the second thickness B / first When the thickness A is in the range of 1.5 to 2.5, and ii) the second thickness B / the first thickness A is 1.0 or more when the loft θ is in the range of 25 ° to less than 33 °. When the loft θ is in the range of less than 2.0 and the loft θ is in the range of 33 ° to less than 50 °, the second thickness B / the first thickness A is in the range of 0.5 to less than 1.5. It is also possible to specify by the expression.

  Note that the first thickness A and the second thickness B shown in Table 1 are merely examples. In order to achieve the purpose of making the resilience performance of the face portion 150 substantially constant between a plurality of counts, for example, the resilience performance of the face portion 150 with a high count is increased and the resilience performance of the face portion 150 with a low count is decreased In order to achieve the object of making the rebound performance of the face portion 150 substantially constant among a plurality of counts, the first thickness A, the second thickness B, and the height of the face portion shown in Table 1 are achieved. And / or the loft can be changed as appropriate. For example, the first thickness A and / or the second thickness B may be the same among three or more counts, and the first thickness A and / or the second thickness among all counts. B may be different.

  Table 1 shows the first thickness A and the second thickness B only for No. 4 to No. 9 and PW as an example, but for No. 1 to No. 3 and SW as well, between a plurality of counts The first thickness A and the second thickness B can be assigned using the same method to make the resilience performance substantially constant.

  Moreover, as a most preferable aspect, although the aspect from which both 1st thickness A and 2nd thickness B differ between several counts is shown by Table 1, between several counts, One of the first thickness A and the second thickness B may be constant (invariable), and only the other of the first thickness A and the second thickness B may be changed.

  FIG. 5 shows an example in which the cross-sectional shape at the reference position of the lower coupling portion 144 is rectangular, but the cross-sectional shape at the reference position of the lower coupling portion 144 is trapezoidal, rhombus, circular, It may have an arbitrary shape including an elliptical shape or a polygonal shape, or may have a cross-sectional shape including a curved surface.

The specific example of the lower coupling portion 144 has been described above, but the upper coupling portion 134 can also be formed by the same technique as the lower coupling portion 144. Specifically, as shown in FIG. 5, the upper coupling portion 134 has a first thickness A ′ along the vertical direction (that is, the direction from the sole portion 140 toward the top portion 130), and from the top portion 130. A second thickness B ′ is provided along the direction toward the face portion 150. The first thickness A ′ and the second thickness B ′ specify the size of the upper coupling portion 134.
Similarly to the lower joint portion 144, if the first thickness A ′ of the upper joint portion 134 is reduced (larger), the rigidity of the upper joint portion 134 becomes smaller (larger), so that the deflection of the face portion 150 is increased (smaller). )can do. Similarly, if the second thickness B ′ of the upper coupling portion 134 is increased (decreased), the rigidity of the upper coupling portion 134 is decreased (increased), so that the deflection of the face portion 150 can be increased (decreased). .

  Also for the upper coupling portion 134, the relationship between the count and the first thickness A ′ and the second thickness B ′ is, for example, i) when the loft θ is in the range of 15 ° or more and less than 25 °, When the thickness B ′ / the first thickness A ′ is in the range of 1.0 to 2.0, and ii) the second thickness B ′ / the second thickness when the loft θ is in the range of 25 ° to less than 33 °. When the thickness A ′ of 1 is in the range of 0.5 or more and less than 1.5 and the loft θ is in the range of 33 ° or more and less than 50 °, the second thickness B ′ / the first thickness A ′ is 0. It is also possible to specify by the expression of being in the range of.

  In the present embodiment, as the most preferable mode, a mode in which the sizes of both the upper coupling portion 134 and the lower coupling portion 144 are made different among a plurality of counts is shown, but one of the upper coupling portion 134 and the lower coupling portion 144 is shown. The variation in the resilience performance between the plurality of counts can be suppressed also by the mode in which the size of the number is different between the plurality of counts.

  The technical idea disclosed in this specification is not limited to the configuration shown in FIG. 5, and is arranged between the face part 150 and the sole part 140 (and / or the top part 130). Arbitrary structure provided with the coupling | bond part which couple | bonds the sole part 140 (and / or top part 130), and can accept | permit or suppress the bending of the face part 150 by changing a size It is possible to apply to. The coupling portion may be integrated with the face portion 150, may be integrated with the sole portion 140 (and / or the top portion 130), or the face portion 150. The sole portion 140 (and / or the top portion 130) may be provided as a separate body.

  As described above, in the present embodiment, a plurality of sizes of coupling portions that are arranged between the face portion and the sole portion (and / or the top portion) and connect the face portion and the sole portion (and / or the top portion) are set to a plurality of sizes. By changing the rigidity of the coupling portion between the plurality of counts by making the difference between the counts, the obtained restitution coefficient can be kept substantially constant between the plurality of counts. Here, making the coefficient of restitution substantially constant among a plurality of counts means that these coefficient of restitution is maintained at exactly the same value, and that these coefficient of restitution is within a certain range. Including keeping it fit. Thereby, the iron golf club which suppresses the dispersion | variation in the resilience performance between counts can be provided.

  In general, the coefficient of restitution of an iron golf club can vary depending on the thickness of the face portion. Specifically, the coefficient of restitution of an iron golf club decreases as the thickness of the face portion increases (because the face portion becomes difficult to bend), and as the thickness of the face portion decreases (the face portion becomes easier to bend). Tend to increase). Therefore, in order to more reliably achieve the purpose of keeping the obtained coefficient of restitution substantially constant between the plurality of counts by changing the rigidity of the coupling portion between the plurality of counts, the thickness of the face portion is set to a plurality of thicknesses. It is preferable to make it approximately constant between counts.

  The present applicant included not only the iron golf club set constituted by a plurality of iron golf clubs disclosed in the present specification but also the iron golf club set as described in the appended claims. One iron golf club (eg, one iron golf club sold separately from an iron golf club set) is also intended to be patented.

10 Iron Golf Club 100 Golf Club Head (Head)
110 Heel part 120 Toe part 130 Top part 134 Upper joint part 140 Sole part 144 Lower joint part 150 Face part

Claims (6)

An iron golf club set composed of a plurality of iron golf clubs,
Each iron golf club
A sole portion extending from one end toward the other end and forming a bottom surface;
A plate-like face portion extending facing the sole portion;
A coupling portion that is disposed between the sole portion and the face portion, extends along the sole portion and the face portion, and couples the sole portion and the face portion;
Having a head with
The size of the joint portion at the reference position includes a second thickness of the joint portion along a direction from the sole portion toward the face portion,
Size at the reference position of the coupling portion of certain iron golf clubs contained in the iron golf club set, becomes size and different in the reference position of the coupling portion of another iron golf clubs contained in the iron golf club set And
The second thickness of the coupling portion of the iron golf club having a certain number is greater than the second thickness of the coupling portion of the iron golf club having a lower number than the certain number included in the iron golf club set. large,
Iron golf club set characterized by that. The iron golf club set according to claim 1, wherein a size of the joint portion at the reference position includes a first thickness of the joint portion along a vertical direction.   The connecting portion of the iron golf club having the first thickness of the connecting portion of the iron golf club of a certain number included in the iron golf club set is lower than the certain number of the iron golf club set included in the iron golf club set. The iron golf club set according to claim 2, wherein the iron golf club set is smaller than the first thickness. One iron golf club included in the iron golf club set according to any one of claims 1 to 3 . An iron golf club included in an iron golf club set,
The iron golf club set includes another iron golf club having a lower count than the iron golf club,
The iron golf club and the other iron golf club are respectively
A sole portion extending from one end to the other end and forming a bottom surface, a plate-like face portion extending opposite the sole portion, and disposed between the sole portion and the face portion; A head that extends along the face portion and includes a coupling portion that couples the sole portion and the face portion;
A rod-like shaft attached to the head;
Comprising
The size of the joint portion at the reference position includes a second thickness of the joint portion along a direction from the sole portion toward the face portion,
The second thickness of the coupling portion of the iron golf club is greater than the second thickness of the coupling portion of the other iron golf club;
An iron golf club of an iron golf club set characterized by that. The size of the connecting portion at the reference position is a first thickness of the connecting portion along a vertical direction, and a second thickness of the connecting portion along a direction from the sole portion toward the face portion. The iron golf club according to claim 5 , comprising at least one of them.

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