JP6470434B1 - Iron golf club head and iron golf club - Google Patents

Abstract

An iron golf club head capable of suppressing the pitch and sound of a hitting ball while achieving both resilience performance and durability, and an iron golf club including the iron golf club head are provided. An iron golf club head includes a head portion, a badge portion, and an adhesive member. The head unit 10 has a face surface 11 and a back surface 13. The badge unit 20 is attached to the back surface 13. The adhesive member 30 bonds the back surface 13 and the badge unit 20 together. The head portion 10 includes a thin portion 16 and a thick portion 15. The adhesive member 30 includes a first adhesive part 31 adhered to the badge part 20 and a second adhesive part 32 protruding from the first adhesive part 31 to the opposite side of the badge part 20. The badge part 20 is adhered to the thick part 15 via the first adhesive part 31 and is adhered to the thin part 16 via the first adhesive part 31 and the second adhesive part 32. [Selection] Figure 3

Description

  The present invention relates to an iron golf club head and an iron golf club.

  Japanese Patent Laid-Open No. 2006-149964 (Patent Document 1) describes an iron golf club for achieving both resilience performance and durability. The iron golf club described in this publication has a thick part that forms a region including a sweet spot, and a thin part provided outside the thick part. For this reason, the resilience performance can be improved by the thin portion and the durability can be improved by the thick portion.

JP 2006-149964 A

  In the iron golf club described in the above publication, the hitting sound becomes too high and the sound of the hitting sound becomes too long. If the hitting sound becomes too high, or the sound of the hitting sound becomes too long, the feeling of hitting becomes worse.

  The present invention has been made in view of the above problems, and an object thereof is to provide an iron golf club head capable of suppressing the pitch and sound of a hitting ball while achieving both resilience performance and durability. It is to provide an iron golf club.

  The iron golf club head of the present invention includes a head portion, a badge portion, and an adhesive member. The head portion has a face surface and a back surface. The badge part is attached to the back surface. The adhesive member bonds the back surface and the badge part. The head portion includes a thin portion and a thick portion that surrounds the thin portion and has a thickness in the direction from the face surface toward the back surface that is larger than the thin portion. The adhesive member includes a first adhesive portion that is bonded to the badge portion, and a second adhesive portion that protrudes from the first adhesive portion to the opposite side of the badge portion. The badge part is adhered to the thick part via the first adhesive part, and is adhered to the thin part via the first adhesive part and the second adhesive part.

  According to the iron golf club head of the present invention, the resilience performance can be improved by bending the face surface by the thin portion, and the durability of the face surface can be improved by the thick portion. Further, the hitting sound can be suppressed by the badge portion. Furthermore, the badge part is adhered to the thick part via the first adhesive part, and is adhered to the thin part via the first adhesive part and the second adhesive part. For this reason, the vibration of the thick part is suppressed by the first adhesive part, and the vibration of the thin part is suppressed by the first adhesive part and the second adhesive part. Thereby, the pitch and sound of the hitting sound can be suppressed. Therefore, the pitch and sound of the hitting sound can be suppressed while achieving both resilience performance and durability.

  In the above iron golf club head, preferably, the second adhesive portion includes an intermediate layer, and a first adhesive layer and a second adhesive layer arranged so as to sandwich the intermediate layer. The first adhesive layer is bonded to the first bonding portion. The second adhesive layer is bonded to the back surface. That is, a double-sided tape can be used as the second adhesive portion. Thereby, attachment of a badge part becomes easy. Therefore, the productivity of the iron golf club head can be improved.

  In the above iron golf club head, preferably, the second adhesive portion is an adhesive. For this reason, an adhesive agent can be used for a 2nd adhesion part.

  In the above iron golf club head, preferably, the badge portion has a back surface facing the back surface. The back surface is flat. For this reason, productivity of a badge part can be improved. Moreover, the cost of a badge part can be reduced. Furthermore, since the shape accuracy of the badge portion is easily secured, the adhesive strength of the badge portion can be improved.

  In the above iron golf club head, preferably, the first adhesive portion is arranged along the outer peripheral edge of the badge portion. The badge part is easy to peel off from the back surface starting from the outer periphery. Therefore, it can suppress effectively that a badge part peels from a back surface.

  In the above iron golf club head, preferably, the head portion includes a toe portion and a heel portion. The thin portion includes a first thin portion and a second thin portion. The first thin portion and the second thin portion are arranged side by side in a direction from the toe portion toward the heel portion. The face surface has high durability in the direction from the toe portion toward the heel portion. Therefore, it is possible to effectively achieve both improvement in durability and improvement in resilience performance.

  In the above iron golf club head, preferably, the head portion includes a top portion and a sole portion. The width of the thick portion sandwiched between the first thin portion and the second thin portion in the direction from the toe portion toward the heel portion increases in the direction from the top portion toward the sole portion. When hitting a ball, the face surface is more likely to contact the golf ball near the sole portion than the top portion. Therefore, the durability can be effectively improved by increasing the width of the thick portion in the region where the face surface is easily contacted with the golf ball.

  In the above iron golf club head, preferably, the second adhesive portion is disposed at the center of each of the first thin portion and the second thin portion. For this reason, the vibration mode which makes the center of a 1st thin part and a 2nd thin part an antinode can be suppressed.

  In the above iron golf club head, preferably, the thickness of the adhesive member disposed in the thin portion is greater than the thickness of the adhesive member disposed in the thick portion in the direction in which the back surface and the badge portion face each other. For this reason, the vibration of the thin portion can be effectively suppressed by the adhesive member.

  The iron golf club of the present invention includes the above iron golf club head, a shaft having one end and the other end, and a grip. The iron golf club head is attached to one end of the shaft. The grip is attached to the other end of the shaft. Thereby, it is possible to obtain an iron golf club capable of suppressing the pitch and sound of the hitting ball while achieving both resilience performance and durability.

  As described above, according to the iron golf club head of the present invention and the golf club equipped with the same, it is possible to suppress the pitch and sound of the hitting sound while achieving both resilience performance and durability.

It is a front view showing roughly the composition of the iron golf club head in one embodiment of the present invention. It is a rear view which shows roughly the structure of the iron golf club head in one embodiment of this invention. It is sectional drawing which follows the III-III line of FIG. It is a rear view which shows roughly the structure of the head part in one embodiment of this invention. It is a front view which shows roughly the structure of the badge part and adhesive member in one embodiment of this invention. It is sectional drawing which shows schematically the manufacturing method of the iron golf club head in one embodiment of this invention. It is sectional drawing which shows schematically the manufacturing method of the modification 1 of the iron golf club head in one embodiment of this invention. It is sectional drawing which shows roughly the manufacturing method of the modification 2 of the iron golf club head in one embodiment of this invention. It is a front view showing roughly the composition of the iron golf club in one embodiment of the present invention. It is a graph which shows the relationship between the ball speed of the comparative example 1 and the comparative example 2 and Example 1, and the position of a toe heel direction. It is a graph which shows the relationship between the ball speed of the comparative example 1 and the comparative example 2 and Example 1, and the position of an up-down direction. It is a graph which shows the relationship between the carry of the comparative example 1 and the comparative example 2 and Example 1, and the position of a toe heel direction. It is a graph which shows the relationship between the carry of the comparative example 1 and the comparative example 2 and Example 1, and the position of an up-down direction. It is a front view which shows roughly the structure of the badge part and adhesive member in the comparative example 3. It is a front view which shows roughly the structure of the badge part in Example 2, and an adhesive member. It is a front view which shows roughly the structure of the badge part in Example 3, and an adhesive member. It is a graph which shows the relationship between the sound pressure of Comparative Example 3 and Example 2 and Example 3, and a frequency. It is a graph which shows the relationship between the sound pressure of comparative example 3, and time. It is a graph which shows the relationship between the sound pressure of Example 2, and time. It is a graph which shows the relationship between the sound pressure of Example 3, and time.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
With reference to FIGS. 1-5, the structure of the iron golf club head in one embodiment of this invention is demonstrated. As shown in FIGS. 1 to 3, the iron golf club head 100 according to the present embodiment includes a head portion 10, a badge portion 20, and an adhesive member 30.

  The head portion 10 includes a toe portion 10a, a heel portion 10b, a top portion 10c, a sole portion 10d, a face surface 11, a groove portion 12, a back surface 13, a cavity standing surface 14, and a thick portion 15. The thin portion 16 and the hosel portion 17 are provided. The face surface 11 is a hitting surface. The face surface 11 is surrounded by a toe portion 10a, a heel portion 10b, a top portion 10c, and a sole portion 10d. The toe portion 10a is a portion that connects the top portion 10c on the side away from the hosel portion 17 and the sole portion 10d. The heel portion 10b is a portion from the lower end of the hosel portion 17 to the sole portion 10d. The top part 10c is a part constituting the upper edge of the head part 10 from the hosel part 17 to the toe part 10a. The sole portion 10d is a portion that constitutes a lower end edge portion (bottom portion) of the head portion 10.

  As shown in FIG. 1, the face surface 11 is provided with a plurality of grooves (score lines) 12. Each of the plurality of groove portions 12 is linearly formed in a direction from the toe portion 10a toward the heel portion 10b (a direction crossing the face surface 11). Each of the plurality of groove portions 12 is disposed at substantially equal intervals in a direction from the top portion 10c toward the sole portion 10d (a direction in which the face surface 11 is longitudinally cut).

  As shown in FIG. 2, the back surface 13 is located behind the face surface 11. The back surface 13 is surrounded by the cavity standing surface 14. That is, the back surface 13 is provided in the cavity mouth frame surrounded by the cavity standing surface 14. Further, the back surface 13 is provided on both the thick portion 15 and the thin portion 16. The material of the face surface 11 in the head unit 10 is, for example, titanium. The material of the face surface 11 is not limited to titanium, and may be carbon steel such as S25C, special steel such as chrome molybdenum steel, or maraging steel. The material around the face surface 11 in the head unit 10 is, for example, stainless steel.

  As shown in FIGS. 3 and 4, the thick portion 15 is configured to surround the thin portion 16. The thick portion 15 is thicker than the thin portion 16 in the direction from the face surface 11 toward the back surface 13. In other words, the back surface 13 is provided with a concave portion RP constituted by a thin portion 16 and a thick portion 15 protruding in a direction from the thin portion 16 toward the badge portion 20. In the present embodiment, two recesses RP are provided. The two concave portions RP are arranged side by side in a direction from the toe portion 10a toward the heel portion 10b. The area of the concave portion RP disposed on the toe portion 10a side is larger than the area of the concave portion RP disposed on the heel portion 10b side. The sweet spot on the face surface 11 is arranged in a region overlapping the thick portion 15. The thickness of the thick portion 15 in the direction from the face surface 11 to the back surface 13 may be uniform. The thickness of the thick part 15 is 2.45 mm, for example. The thickness of the thin portion 16 in the direction from the face surface 11 to the back surface 13 may be uniform. The thickness of the thin portion 16 is, for example, 2.0 mm.

  As shown in FIGS. 2 and 3, the badge unit 20 is attached to the back surface 13. The badge unit 20 is accommodated in an area surrounded by the cavity standing surface 14. The badge unit 20 has a back surface 21 that faces the back surface 13. The back surface 21 of the badge unit 20 is configured to be flat. That is, the back surface 21 of the badge unit 20 is a flat surface. The material of the badge part 20 is, for example, a metal material such as aluminum, stainless steel, nickel, or an electroformed product, a resin such as ABS (Acrylonitrile Butadiene Styrene) or TPU (Thermoplastic Polyethane), or a carbon fiber reinforced resin (CFRP; Carbon Fiber). Reinforced Plastic), and composites thereof.

  The adhesive member 30 bonds the back surface 13 of the head unit 10 and the badge unit 20 together. The adhesive member 30 is disposed between the head unit 10 and the badge unit 20. The adhesive member 30 includes a first adhesive portion 31 and a second adhesive portion 32. The first bonding portion 31 is bonded to the badge portion 20. The first bonding portion 31 is bonded to the back surface 21 of the badge portion 20. In addition, the first bonding portion 31 is bonded to the thick portion 15 of the head portion 10. The second adhesive portion 32 protrudes from the first adhesive portion 31 to the side opposite to the badge portion 20. In the present embodiment, the first adhesive portion 31 and the second adhesive portion 32 are separate bodies. The second adhesive portion 32 is laminated with the first adhesive portion 31 in the direction from the face surface 11 toward the back surface 13. The second bonding part 32 is bonded to the first bonding part 31. The second adhesive portion 32 is adhered to the thin portion 16 of the head portion 10. The material of the 1st adhesion part 31 and the 2nd adhesion part 32 may mutually differ, and may mutually be the same. The first adhesive portion 31 and the second adhesive portion 32 may be integrated.

  The badge part 20 is bonded to the thick part 15 via the first bonding part 31. The badge part 20 is bonded to the thin part 16 via the first bonding part 31 and the second bonding part 32. The badge part 20 is arrange | positioned so that the recessed part RP may be covered. The 1st adhesion part 31 is arranged so that crevice RP may be closed up. The second adhesive portion 32 is disposed in the internal space of the recess RP.

  In the present embodiment, the second adhesive portion 32 has a first portion 321 and a second portion 322. The first portion 321 and the second portion 322 are arranged away from each other in plan view. Each of the first portion 321 and the second portion 322 is disposed in each of the two recesses RP. The area and volume of the first portion 321 are larger than the area and volume of the second portion 322. The first portion 321 and the second portion 322 are arranged side by side in a direction from the toe portion 10a toward the heel portion 10b. The first portion 321 is disposed closer to the toe portion than the second portion 322 in the direction from the toe portion 10a to the heel portion 10b.

  In the present embodiment, the first adhesive portion 31 and the second adhesive portion 32 are double-sided tape. The 1st adhesion part 31 and the 2nd adhesion part 32 may be provided with the same composition mutually. The structure of the 1st adhesion part 31 and the 2nd adhesion part 32 is demonstrated based on the 2nd adhesion part 32. FIG. The 2nd adhesion part 32 has the 1st adhesion layer 32a, the 2nd adhesion layer 32b, and the middle class 32c. The first adhesive layer 32a, the second adhesive layer 32b, and the intermediate layer 32c are laminated with each other. The first adhesive layer 32a and the second adhesive layer 32b are arranged so as to sandwich the intermediate layer 32c. The first adhesive layer 32 a is bonded to the first bonding portion 31. The first adhesive layer 32a is bonded to the intermediate layer 32c. The second adhesive layer 32 b is bonded to the back surface 13. The second adhesive layer 32b is bonded to the intermediate layer 32c.

  As a double-sided tape used for the 1st adhesion part 31, 3M Y4608 (thickness 0.8mm) is mentioned, for example. Examples of the double-sided tape used for the second adhesive portion 32 include 3M 5925 (thickness 0.64 mm). The double-sided tape is not limited to these as long as the thickness and adhesive strength are appropriate.

  In the present embodiment, the first adhesive portion 31 is disposed along the outer peripheral edge of the badge portion 20. Specifically, it is disposed along the outer peripheral edge of the back surface 21 of the badge unit 20. In addition, the 1st adhesion part 31 may be arrange | positioned over the perimeter of the outer periphery of the badge part 20. FIG.

  In the present embodiment, the thin portion 16 has a first thin portion 16a and a second thin portion 16b. The first thin portion 16a and the second thin portion 16b are arranged side by side in the direction from the toe portion 10a toward the heel portion 10b. Each of the first thin portion 16a and the second thin portion 16b constitutes each of the two recesses RP.

  The width of the thick portion 15 sandwiched between the first thin portion 16a and the second thin portion 16b in the direction from the toe portion 10a toward the heel portion 10b increases in the direction from the top portion 10c toward the sole portion 10d. That is, the thick portion 15 sandwiched between the first thin portion 16a and the second thin portion 16b is configured to expand toward the sole portion 10d from the top portion 10c.

  In the present embodiment, the thickness of the adhesive member 30 arranged in the thin portion 16 is larger than the thickness of the adhesive member 30 arranged in the thick portion 15 in the direction in which the back surface 13 and the badge portion 20 face each other. For this reason, the damper (vibration damping) effect by the adhesive member 30 is greater in the thin portion 16 than in the thick portion 15.

  As shown in FIG. 5, in the present embodiment, the first adhesive portion 31 is disposed on the entire surface of the badge portion 20 that faces the back surface 13. The first adhesive portion 31 may have an outer peripheral edge that is substantially similar to the outer peripheral edge of the badge portion 20. Further, the outer peripheral edge of the first adhesive portion 31 may be located, for example, 1 mm inside the outer peripheral edge of the badge unit 20. The second adhesive portion 32 is disposed inside the outer peripheral edge of the first adhesive portion 31. The outer peripheral edge of each of the first part 321 and the second part 322 of the second adhesive part 32 may be located, for example, 2 mm inside the outer peripheral edge of the first adhesive part 31. Furthermore, it is preferable to arrange | position the 1st part 321 and the 2nd part 322 of the 2nd adhesion part 32 in each center of the 1st thin part 16a and the 2nd thin part 16b. The center of each of the first thin portion 16a and the second thin portion 16b is a centroid in plan view of each of the first thin portion 16a and the second thin portion 16b. Thereby, the effect which suppresses the vibration mode which uses the center of the 1st thin part 16a and the 2nd thin part 16b as a belly is acquired.

  Next, with reference to FIG. 6, the manufacturing method of the iron golf club head 100 in one embodiment of this invention is demonstrated. In the method for manufacturing iron golf club head 100 in the present embodiment, first bonding portion 31 is bonded to back surface 21 of badge portion 20. In the back surface 13, the first portion 321 and the second portion 322 of the second bonding portion 32 are respectively bonded to the first thin portion 16 a and the second thin portion 16 b of the thin portion 16. 6, the badge portion 20 is attached to the back surface 13 via the adhesive member 30 when the badge portion 20 is pressed against the head portion 10.

  As another manufacturing method, the first adhesive portion 31 is adhered to the back surface 21 of the badge portion 20, and the first portion 321 and the second portion 322 of the second adhesive portion 32 are adhered to the first adhesive portion 31. The badge part 20 is created. The badge unit 20 may be attached to the back surface 13 by pressing the badge unit 20 against the head unit 10.

  In a state before the badge portion 20 is pressed against the head portion 10, the second adhesive portion 32 protrudes from the thick portion 15 in the direction from the face surface 11 toward the back surface 13. The thickness T1 of the thick portion 15 is 2.45 mm, for example, and the thickness T2 of the thin portion 16 is 2.0 mm, for example. Moreover, the thickness of the 2nd adhesion part 32 is 0.64 mm, for example. In this case, since the depth of the recess RP is 0.45 mm, the second adhesive portion 32 protrudes by 0.19 mm from the thick portion 15 in the thickness direction. When the badge part 20 is pressed against the head part 10, the second adhesive part 32 is compressed in the thickness direction. Thus, in the present embodiment, the adhesive member 30 is disposed between the back surface 13 and the badge unit 20 in a compressed state. In a state before the adhesive member 30 is compressed, the thickness of the second adhesive portion 32 disposed in the thin portion 16 is greater than the depth of the thin portion 16 in the direction in which the back surface 13 and the badge portion 20 face each other. The second adhesive portion 32 is compressed to a thickness of about 70% before compression after pressure bonding. The first adhesive portion 31 is bonded to the thick portion 15 in a state where the second adhesive portion 32 is compressed. Thereby, in the thin part 16 and the thick part 15 of the back surface 13, it can be made to have equal adhesive strength.

  Then, with reference to FIG. 7, the modification 1 of the manufacturing method of the iron golf club head 100 in one embodiment of this invention is demonstrated. In addition, about the structure similar to the manufacturing method of the iron golf club head 100 of this Embodiment, the same referential mark is used and description is not repeated unless it mentions especially. In the first modification of the method for manufacturing the iron golf club head 100 according to the present embodiment, the area and volume of the second bonding portion 32 are smaller than those of the method for manufacturing the iron golf club head 100 according to the present embodiment. Therefore, in the first modification of the method for manufacturing the iron golf club head 100 according to the present embodiment, the thickness constituting the second adhesive portion 32 and the recess RP is compared with the method for manufacturing the iron golf club head 100 according to the present embodiment. The gap between the meat part 15 is large.

  A modified example 2 of the method for manufacturing the iron golf club head 100 according to the embodiment of the present invention will be described with reference to FIG. In addition, about the structure similar to the manufacturing method of the iron golf club head 100 of this Embodiment, the same referential mark is used and description is not repeated unless it mentions especially. Modification 2 of the method for manufacturing the iron golf club head 100 in the present embodiment is different from the method for manufacturing the iron golf club head 100 in the present embodiment in that the second bonding portion 32 is an adhesive. .

  The adhesive may be a one-component adhesive such as Cemedine Super X mainly composed of a silicone resin, or a two-component adhesive called an epoxy adhesive, and the type of the adhesive is not limited. However, what has adhesive force with respect to both a double-sided tape and metal is desirable.

  On the back surface 13, the first portion 321 and the second portion 322 of the second adhesive portion 32 are respectively applied to the first thin portion 16 a and the second thin portion 16 b of the thin portion 16. 6, the badge portion 20 is attached to the back surface 13 via the adhesive member 30 when the badge portion 20 is pressed against the head portion 10.

  In a state before the badge portion 20 is pressed against the head portion 10, the second adhesive portion 32 protrudes from the thick portion 15 in the direction from the face surface 11 toward the back surface 13. When the badge part 20 is pressed against the head part 10, the second adhesive part 32 is spread by the first adhesive part 31, and the adhesive strength is ensured. The first adhesive portion 31 is bonded to the thick portion 15 in a state where the second adhesive portion 32 is spread. On the other hand, it is natural from the viewpoint of adhesiveness that the adhesive member 30 does not protrude beyond the thin portion 16 and into the thick portion 15.

  In the second modification, the embodiment in which the second adhesive portion 32 is an adhesive has been described. However, the first adhesive portion 31 may be an adhesive, and the second adhesive portion 32 may be a double-sided tape. Alternatively, both the first adhesive portion 31 and the second adhesive portion 32 may be an adhesive.

  Next, with reference to FIG. 9, the structure of the iron golf club 200 in one embodiment of the present invention will be described. Iron golf club 200 in the present embodiment includes iron golf club head 100 in the present embodiment, shaft 201, and grip 202. The shaft 201 has one end and the other end. The iron golf club head 100 is attached to one end of the shaft 201. One end of the shaft 201 is inserted into the hosel portion 17. The grip 202 is attached to the other end of the shaft 201. The other end of the shaft 201 is inserted into the grip 202. Note that well-known shafts 201 and grips 202 can be employed.

  Next, effects of the iron golf club head 100 and the iron golf club 200 in one embodiment of the present invention will be described.

  According to the iron golf club head 100 in the present embodiment, the resilience performance can be improved by bending the face surface 11 by the thin portion 16, and the durability of the face surface 11 can be improved by the thick portion 15. Can do. Moreover, the badge part 20 has covered the recessed part RP which amplifies a hitting sound. Furthermore, since the 2nd adhesion part 32 is arranged in the interior space of crevice RP, the crevice of the interior space of crevice RP decreases. For this reason, the hitting sound can be suppressed by the badge unit 20. Furthermore, the badge part 20 is bonded to the thick part 15 via the first bonding part 31 and is bonded to the thin part 16 via the first bonding part 31 and the second bonding part 32. For this reason, the vibration of the thick portion 15 is suppressed by the first adhesive portion 31 and the vibration of the thin portion 16 is suppressed by the first adhesive portion 31 and the second adhesive portion 32. Therefore, the vibration of the thin portion 16 having a great influence on the pitch and sound of the hitting sound is effectively suppressed. Thereby, the pitch and sound of the hitting sound can be suppressed. Therefore, the pitch and sound of the hitting sound can be suppressed while achieving both resilience performance and durability.

  Further, the badge unit 20 is bonded to the thick portion 15 via the first bonding portion 31 and is bonded to the thin portion 16 via the first bonding portion 31 and the second bonding portion 32. Accordingly, since the badge part 20 is also adhered to the thin part 16, the adhesion area of the badge part 20 is increased. For this reason, the intensity | strength which adhere | attaches the badge part 20 improves. Thereby, it can suppress that the badge part 20 peels from the back surface 13. FIG.

  In the iron golf club head 100 according to the present embodiment, the first adhesive layer 32a of the second adhesive portion 32 is adhered to the first adhesive portion 31, and the second adhesive layer 32b is adhered to the back surface 13. . That is, a double-sided tape can be used as the second adhesive portion 32. Thereby, attachment of the badge part 20 becomes easy. Therefore, the productivity of the iron golf club head 100 can be improved.

  In the iron golf club head 100 in the present embodiment, the second adhesive portion 32 is an adhesive. For this reason, an adhesive can be used for the second adhesive portion 32.

  In iron golf club head 100 in the present embodiment, back surface 21 of badge unit 20 is configured to be flat. Therefore, it is not necessary to match the back surface 21 of the badge part 20 with the shape of the back surface 13. For this reason, the productivity of the badge unit 20 can be improved. Moreover, the cost of the badge part 20 can be reduced. Furthermore, since the shape accuracy of the badge part 20 is easily secured, the adhesive strength of the badge part 20 can be improved.

  In the iron golf club head 100 in the present embodiment, the first adhesive portion 31 is disposed along the outer peripheral edge of the badge portion 20. The badge part 20 is easy to peel off from the back surface 13 from the outer periphery. Therefore, it can suppress effectively that the badge part 20 peels from the back surface 13. FIG.

  In iron golf club head 100 in the present embodiment, first thin portion 16a and second thin portion 16b of thin portion 16 are arranged side by side in a direction from toe portion 10a to heel portion 10b. The face surface 11 has high durability in the direction from the toe portion 10a toward the heel portion 10b. Therefore, it is possible to effectively achieve both improvement in durability and improvement in resilience.

  In the iron golf club head 100 according to the present embodiment, the width of the thick portion 15 sandwiched between the first thin portion 16a and the second thin portion 16b in the direction from the toe portion 10a to the heel portion 10b is the top portion. It increases in the direction from 10c toward the sole portion 10d. At the time of hitting the ball, the face surface 11 is easier to contact the golf ball near the sole portion 10d than the top portion 10c. Therefore, the durability can be effectively improved by increasing the width of the thick portion 15 in the region of the face surface 11 where the golf ball is easily contacted.

  In iron golf club head 100 in the present embodiment, second adhesive portion 32 is arranged at the center of first thin portion 16a and second thin portion 16b. For this reason, it is possible to suppress a vibration mode in which the center of the first thin portion 16a and the second thin portion 16b is a stomach.

  In the iron golf club head 100 according to the present embodiment, the thickness of the adhesive member 30 disposed in the thin portion 16 is the adhesive member disposed in the thick portion 15 in the direction in which the back surface 13 and the badge portion 20 face each other. Greater than 30 thickness. Therefore, the damper (vibration damping) effect by the adhesive member 30 disposed in the thin portion 16 is larger than the damper (vibration damping) effect by the adhesive member 30 disposed in the thick portion 15. For this reason, the vibration of the thin portion 16 can be effectively suppressed by the adhesive member 30.

  The iron golf club 200 of the present embodiment includes the iron golf club head 100 of the present embodiment. Thereby, it is possible to obtain the iron golf club 200 capable of suppressing the pitch and sound of the hitting sound while achieving both resilience performance and durability.

  Hereinafter, examples of the present invention will be described in comparison with comparative examples. In addition, the same reference number is attached | subjected to the part which is the same as that of this Embodiment mentioned above, or the description is not repeated.

  Using Example 1, Comparative Example 1 and Comparative Example 2, the ball speed (speed) and carry (flying distance) were measured. The ball speed (speed) and carry (flying distance) were measured using a shot robot 4 manufactured by Miyamae Corporation. Example 1 has the structure of the iron golf club in the present embodiment. Each of Comparative Example 1 and Comparative Example 2 does not have the thick part and the thin part in the present embodiment. The club length of Example 1 is 37.75 inches. The club length of Comparative Example 1 is 38 inches. The club length of Comparative Example 2 is 37.75 inches. In all of Example 1, Comparative Example 1, and Comparative Example 2, the head speed was set to 33.6 m / s. In all of Example 1, Comparative Example 1 and Comparative Example 2, the average value of the data of 7 balls was used.

  All of Example 1, Comparative Example 1 and Comparative Example 2 were made to collide with the following five spot positions. The center hit point is the position of the score line center and 15 mm from the leading edge. The toe hitting point is 10 mm on the toe side from the score line center and 15 mm from the leading edge. The heel hit point is a position 10 mm on the heel side from the score line center and a position 15 mm from the leading edge. The up hit point is the position of the score line center and 25 mm from the leading edge. The down hit point is the position of the score line center and 5 mm from the leading edge.

  FIG. 10 shows the relationship between the ball speed (m / s) and the position of the hit point in the toe heel direction (mm) for Comparative Example 1, Comparative Example 2, and Example 1. FIG. 11 shows the relationship between the ball speed (m / s) and the position (mm) of the hitting point in the up-down direction for Comparative Example 1, Comparative Example 2, and Example 1. Referring to FIGS. 10 and 11, Example 1 was larger than Comparative Example 1 and Comparative Example 2 with respect to the ball speed (speed) when colliding with each hitting point position.

  FIG. 12 shows the relationship between the carry (yard) and the position of the hit point in the toe heel direction (mm) for Comparative Example 1, Comparative Example 2, and Example 1. FIG. 13 shows the relationship between the carry (yard) and the position (mm) of the hitting point in the up-down direction for Comparative Example 1, Comparative Example 2, and Example 1. Referring to FIGS. 12 and 13, Example 1 was larger than Comparative Example 1 and Comparative Example 2 in terms of carry (flying distance) when colliding with each hitting point position.

  As described above, the resilience of Example 1 is improved as compared with Comparative Example 1 and Comparative Example 2. In particular, the difference between Example 1 and Comparative Example 1 and Comparative Example 2 was large at the center hit point, toe hit point, and up hit point. Therefore, in Example 1, the resilience is particularly improved at the center hitting point, toe hitting point, and up hitting point as compared with Comparative Example 1 and Comparative Example 2.

  Next, the frequency (Hz) and sound (time) of the hitting sound were measured using Comparative Example 3, Example 2 and Example 3. FIG. 14 shows the configuration of the badge portion and the adhesive member in Comparative Example 3. As shown in FIG. 14, Comparative Example 3 has only the first adhesive portion 31. FIG. 15 shows the configuration of the badge portion and the adhesive member in the second embodiment. FIG. 16 shows the configuration of the badge portion and the adhesive member in the third embodiment. As shown in FIGS. 15 and 16, the area and volume of the second adhesive portion 32 of the second embodiment are smaller than the area and volume of the second adhesive portion 32 of the third embodiment.

  A method for measuring the hitting sound will be described. First, a golf ball with a compression of 100 was prepared. Compression refers to the magnitude of the load when the ball is deformed by a certain amount, and can be measured using, for example, a measuring instrument “trade name; compression 270” manufactured by Kamoshita Seisensho Co., Ltd. . This golf ball was hit in Comparative Example 3, Example 2 and Example 3. Comparative Example 3, Example 2 and Example 3 are each a 7-iron. In all of Comparative Example 3, Example 2 and Example 3, the head speed was 34 m / s. The measurement was made at a score point within a radius of 5 mm with the score line center and 15 mm upward from the leading edge as the center.

  The hitting sound was recorded as follows. A microphone “trade name; condenser microphone 4190” manufactured by Brüel & Kjær Co. was placed at a position where the length was 3 m from the set position of the golf ball toward the front side of the golfer and the height was 0.9 m. This microphone was connected to a microphone power supply “trade name; type 2804 type microphone power supply” manufactured by Brüel & Kjær. The hitting sound at this position was collected and analyzed using a portable stereo audio recorder “trade name: TASCAM HD-P2” manufactured by TEAC Corporation. At the same time, a calibration sound of 1 KHz and 94 dB was taken into the recorder. The frequency analysis of the hitting sound was performed using software “trade name; SOUND QUALITY 7698 sound quality evaluation software” manufactured by Brüel & Kjær. Calibration data and hitting sound data of a total of 0.052 (seconds), 0.002 (seconds) before hitting and 0.05 (seconds) after hitting, were taken into this software. Frequency analysis was performed using these data.

  Referring to FIG. 17, in Comparative Example 3, large peaks were observed at 2000, 4000, and 8000 hertz (Hz), and in Examples 2 and 3, the sound pressure was suppressed at any peak. Therefore, the pitch of the hitting sound in Example 2 and Example 3 was suppressed more than in Comparative Example 3. There was almost no difference between Example 2 and Example 3.

  In addition, with reference to FIGS. 18 to 20, also in the sound pressure time waveform, the loudness of both Example 2 and Example 3 was suppressed compared to Comparative Example 3. In addition, in Example 2 and Example 3, the time of the hitting sound was shorter than that in Comparative Example 3. Therefore, in Example 2 and Example 3, the reverberation of the hitting sound was suppressed more than in Comparative Example 3. There was almost no difference between Example 2 and Example 3.

  10 Head portion, 10a Toe portion, 10b Heel portion, 10c Top portion, 10d Sole portion, 11 Face surface, 12 Groove portion, 13 Back surface, 14 Cavity standing surface, 15 Thick portion, 16 Thin portion, 16a First thin portion 16b 2nd thin part, 17 hosel part, 20 badge part, 21 back surface, 30 adhesive member, 31 1st adhesive part, 32 2nd adhesive part, 32a 1st adhesive layer, 32b 2nd adhesive layer, 32c intermediate layer, 100 iron golf club head, 200 iron golf club, 201 shaft, 202 grip, 321 first part, 322 second part.

Claims (10)

A head portion having a face surface and a back surface;
A badge portion attached to the back surface;
An adhesive member that bonds the back surface and the badge part;
The head portion includes a thin portion, and a thick portion surrounding the thin portion and having a thickness in a direction from the face surface toward the back surface, which is larger than the thin portion,
The adhesive member includes a first adhesive part adhered to the badge part, and a second adhesive part protruding from the first adhesive part to the opposite side of the badge part,
The iron golf club, wherein the badge portion is bonded to the thick portion via the first bonding portion, and is bonded to the thin portion via the first bonding portion and the second bonding portion. head. The second adhesive portion includes an intermediate layer, and a first adhesive layer and a second adhesive layer disposed so as to sandwich the intermediate layer,
The first adhesive layer is bonded to the first adhesive portion,
The iron golf club head according to claim 1, wherein the second adhesive layer is bonded to the back surface.   The iron golf club head according to claim 1, wherein the second adhesive portion is an adhesive. The badge part has a back surface facing the back surface,
The iron golf club head according to claim 1, wherein the back surface is flat.   The iron golf club head according to any one of claims 1 to 4, wherein the first adhesive portion is disposed along an outer peripheral edge of the badge portion. The head portion includes a toe portion and a heel portion,
The thin portion includes a first thin portion and a second thin portion,
The iron golf club head according to any one of claims 1 to 5, wherein the first thin portion and the second thin portion are arranged side by side in a direction from the toe portion toward the heel portion. The head portion includes a top portion and a sole portion,
The width of the thick part sandwiched between the first thin part and the second thin part in a direction from the toe part to the heel part increases in a direction from the top part to the sole part. Item 6. An iron golf club head according to item 6.   8. The iron golf club head according to claim 6, wherein the second adhesive portion is disposed at a center of each of the first thin portion and the second thin portion.   The thickness of the said adhesive member arrange | positioned at the said thin part in the direction which the said back surface and the said badge part face is larger than the thickness of the said adhesive member arrange | positioned at the said thick part. The iron golf club head according to any one of claims. The iron golf club head according to any one of claims 1 to 9,
A shaft having one end and the other end;
With a grip,
The iron golf club head is attached to the one end of the shaft,
The grip is an iron golf club attached to the other end of the shaft.