JP6039444B2 - Golf club head and golf club - Google Patents

Description

  The present invention relates to a golf club head capable of adjusting the weight, and more particularly to a golf club head in which a weight adjusting member is installed inside the head and a golf club including the golf club head.

  2. Description of the Related Art Conventionally, there is known a golf club head in which the weight and the center of gravity can be adjusted by providing a weight adjusting material made of resin or the like on the inner surface of a hollow golf club head (Patent Document 1). In this golf club head, the head body is provided with an opening communicating with the hollow portion from the outside, and the weight adjusting material is attached to the hollow portion through the opening. This opening is covered with a lid member fixed to the head body with a screw. It is also known to adjust the weight of a golf club head by using screws having different lengths to fix such a lid member (Patent Document 2).

JP 2007-136068 A US Pat. No. 5,788,584

  However, when hitting with such a golf club head is repeated, a fixing member (such as a screw) that fixes the lid member may be loosened by the impact of the hit ball, and the lid member may come off. Even if the lid member does not come off, there is a gap between the lid member and the head main body, which may cause noise due to rattling. In particular, a large titanium head exceeding 380 CC often has a portion where the thickness of the minimum thickness portion of the golf club head is 1.0 mm or less, so that the amount of deformation tends to increase due to insufficient rigidity. Accordingly, various embodiments of the present invention provide a golf club head that can securely attach a lid member that covers an opening provided in the head body to the head body, and a golf club including the golf club head. I will. Other objects of the various embodiments of the present invention will become apparent by reference to the entire specification.

  A golf club head according to an embodiment of the present invention includes a hollow portion surrounded by a crown portion, a face portion, a side portion, and a sole portion, and at least a human being formed in the sole portion so as to communicate with the hollow portion. An opening having a size for receiving a finger, a lid member support provided on an inner peripheral surface of the opening, and supported by the lid member support so as to cover the opening, and outward of the hollow part. And a fixing member that detachably fixes the lid member to the lid member support portion by passing through the lid member and being fixed to the lid member support portion. A first engaging portion is formed on the lid member, and the fixing member contacts the first engaging portion from the outside of the hollow portion in a penetrating direction through which the fixing member penetrates the lid member support portion. A second engagement portion that engages with the first engagement portion is formed by contact. That.

  A golf club according to an embodiment of the present invention includes a grip, a shaft coupled to the grip, and a golf club head coupled to the shaft via a hosel. The golf club head includes a hollow portion surrounded by a crown portion, a face portion, a side portion, and a sole portion, and is formed to communicate with the hollow portion in the sole portion, and is at least large enough to receive a human finger. An opening, a lid member support provided on the inner peripheral surface of the opening, and a lid member supported by the lid member support so as to cover the opening and curved outwardly of the hollow And a fixing member that penetrates through the lid member and is fixed to the lid member support portion to detachably fix the lid member to the lid member support portion. An engaging portion is formed, and the lid member support portion contacts the first engaging portion by coming into contact with the first engaging portion from the outside of the hollow portion in the penetrating direction through which the fixing member penetrates the lid member. A second engagement portion that engages with the joint portion is formed.

  According to various embodiments of the present invention, it is possible to provide a golf club head capable of securely attaching a lid member covering an opening provided in the head main body to the head main body and a golf club including the golf club head.

The figure which shows the structure of the golf club provided with the golf club head which concerns on one Embodiment of this invention. FIG. 2 is a top view of the head shown in FIG. 1. The front view of the head shown in FIG. FIG. 2 is a right side view of the head shown in FIG. 1. FIG. 2 is a rear view of the head shown in FIG. 1. FIG. 2 is a left side view of the head shown in FIG. 1. FIG. 2 is a bottom view of the head shown in FIG. 1. The bottom view of the head which removed the cover member. FIG. 8 is a cross-sectional view of the head of FIG. 7 taken along line AA. BB sectional drawing of the head of FIG. The bottom view of the head of other embodiments of the present invention. FIG. 12 is an AA cross-sectional view of the head of FIG. 11. BB sectional drawing of the head of FIG. The bottom view of the head of other embodiments of the present invention. AA sectional view of the head of FIG. The bottom view of the head of other embodiments of the present invention. FIG. 17 is an AA cross-sectional view of the head of FIG. FIG. 17 is a BB cross-sectional view of the head in FIG. 16. The elements on larger scale of FIG.17 and FIG.18. Explanatory drawing of a press member. The bottom view of the head of other embodiments of the present invention. FIG. 22 is a cross-sectional view of the head of FIG. 21 taken along line AA. Explanatory drawing of an impact buffer part.

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

  FIG. 1 shows a configuration of a golf club provided with a golf club head according to an embodiment of the present invention. As shown in the figure, the 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”). 100.

  A specific configuration of the head 100 will be described with reference to FIGS. FIG. 2 is a top view of the head shown in FIG. FIG. 3 is a front view of the head shown in FIG. FIG. 4 is a right side view of the head shown in FIG. FIG. 5 is a rear view of the head shown in FIG. FIG. 6 is a left side view of the head shown in FIG. FIG. 7 is a bottom view of the head shown in FIG.

  As shown in FIGS. 2 to 7, the head main body of the head 100 includes a crown part 110, a face part 120, a side part 130, and a sole part 140. The head 100 has a hollow structure surrounded by these members. In this specification, the space surrounded by the crown part 110, the face part 120, the side part 130, and the sole part 140 may be referred to as a “hollow part” or a “hollow part of the head (100)”. A weight adjusting material (not shown) such as a resin can be disposed in the hollow portion (for example, the inner wall facing the hollow portion of the sole portion 140). The arrangement of the weight adjusting material can be performed by the user of the golf club, or may be provided as a customer service by a golf club store or the like. The weight, center of gravity, and moment of inertia of the head 100 are adjusted according to the amount of the weight adjusting material and the arrangement location.

  The head 100 is manufactured using various materials so as to have various thicknesses and appearances. For example, the crown part 110, the face part 120, the side part 130, and the sole part 140 can be made of any material including titanium and a titanium alloy, or stainless steel. In one embodiment, the head 100 has a volume of 440 CC, is formed of a titanium alloy, and is configured such that the thinnest portion of the sole portion 140 is 0.8 mm. As will be apparent to those skilled in the art, the head 100 may be manufactured by separately preparing the crown portion 110, the face portion 120, the side portion 130, and the sole portion 140, and joining these members. A part (for example, the crown part 110 and the face part 120) or all of the members may be integrally formed.

  In the embodiment shown in FIG. 2, the crown portion 110 is formed in a substantially fan shape. In the embodiment shown in FIGS. 4 to 6, the crown portion 110 is curved to protrude outward from the head 100 as a whole so that the height increases from the outer peripheral edge toward the center portion. As shown in FIG. 3, the face portion 120 has a shape in which both ends of a plurality of arcs are joined by curved curves. As shown in FIGS. 4 and 6, the face portion 120 is provided adjacent to the crown portion 110, extends in a direction intersecting with the extending direction of the crown portion 110, and forms a first side surface of the head 100. A face surface on which a plurality of score lines are formed is provided on the outer surface of the face portion.

  As shown in FIGS. 3 to 7, in one embodiment, the side portion 130 extends from the side surface on the toe side of the head 100 to the heel side through the back surface. An end on the toe side of the side portion 130 is connected to an end on the toe side of the face portion 120, and an end on the heel side of the side portion 130 is connected to an end on the heel side of the face portion 120.

  In one embodiment, the sole portion 140 has a substantially dish shape as shown in FIGS. 3 to 7 and forms the bottom surface of the head 100. As shown in FIG. 7, the sole part 140 is provided adjacent to the face part 120 and the side part 130 and at a position facing the crown part 110 as shown in FIGS. 4 to 6. Details of the sole portion 140 will be described later. Note that the sole portion 140 does not have to be strictly distinguished from the side portion 130, and a portion obtained by combining the side portion 130 and the sole portion 140 may be regarded as a sole portion.

  As shown in FIGS. 2 to 7, a cylindrical hosel support portion 20 extending obliquely upward is formed at one end of the head 100. A hosel (not shown) is inserted and fixed to the hosel support 20. As described above, the head 100 and the shaft S (FIG. 1) are coupled via the hosel.

  Next, the details of the sole portion 140 will be described with reference to FIGS. FIG. 8 is a bottom view of the head with the lid member removed. FIG. 9 is a cross-sectional view taken along the line AA of the head of FIG. 10 is a cross-sectional view of the head of FIG. 7 taken along the line BB.

As shown in FIG. 8, the sole portion 140 is formed with an opening 142 for arranging the weight adjusting material inside the head main body from the vicinity of the center to the vicinity of the rear end. The opening 142 communicates with the hollow portion of the head 100 from the outside of the head 100. In one embodiment, the opening 142 is shaped to match the contour of the lid member 144 so that the lid member 144 can be received. For example, when the lid member 144 is formed in a substantially triangular shape, the opening 142 is also formed in a triangular shape that matches the outline of the lid member 144. In one embodiment, the size of the opening 142 is at least large enough to accommodate a human finger so that the user can manually place the weight adjusting member inside the head body. For example, according to the AIST Human Body Dimension Database 1991-92 (see http://riodb.ibase.aist.go.jp/dhbodydb/91-92/) The value is 14 mm, and the average cross-sectional area of the second finger proximal joint of the adult male middle finger calculated based on this minimum is about 1.5 cm ² . The size of the opening 142 is set such that such a young male finger can be inserted. For example, in one embodiment, the opening 142 may have an average cross-sectional area of 3.5 cm ² or more. In other embodiments, the average cross-sectional area is 3.0 cm ² or more, 2.5 cm ² , or 2.0 cm ² . The outline of the opening 142 is formed in a substantially triangular shape having three apexes.

  A lid member support 146 that supports the lid member 144 is formed around the opening 142. The lid member support portion 146 is formed on the inner peripheral surface of the opening portion 142 so as to contact the peripheral edge portion of the lid member 144 fitted in the opening portion 142. In the case where the lid member 144 has a triangular shape as in the illustrated embodiment, the lid member support portion 146 is formed wider than the other portions at positions facing the three tops of the triangular lid member 144. Support pieces 148a, 148b and 148c are formed. A screw hole 149 is formed in each of the support pieces 148a, 148b, 148c.

  The lid member 144 is made of various metals and alloys, and is fixed to the lid member support part 146 so as to cover the opening 142 by a fixing member. In one embodiment, a screw 150 made of stainless alloy can be used as the fixing member. In one embodiment, the lid member 144 is made of a material having a lower Young's modulus than the head main body (eg, the sole portion 140), such as an aluminum alloy. Thus, by forming the lid member 144 with a material having a lower Young's modulus than the head body, the through-hole 143 of the lid member 144 is more than when the lid member 144 is formed with a material having a Young's modulus similar to that of the head body. Stress concentration on the periphery and the lid member support portion 146 can be reduced. In the embodiment shown in FIGS. 9 and 10, the lid member 144 has a plate-like shape in which the vicinity of the center of the lid member 144 is curved outwardly from the head 100 (outward of the hollow portion) in order to increase the moment of inertia. It is formed. The lid member 144 is formed in a shape that matches the shape of the opening 142 so as to cover the opening 142. The lid member 144 is formed of, for example, a substantially triangular plate member having three tops as illustrated. The plate thickness of the lid member 144 may be constant or may vary depending on the position. In addition, the surface of the lid member 144 may be provided with unevenness due to various requests such as improvement of aerodynamic resistance and a viewpoint of design. Through holes 143 are formed at positions corresponding to the screw holes 149 of the support pieces 148 a, 148 b, and 148 c at each of the three top portions of the lid member 144. When attaching the lid member 144 to the head body, the lid member 144 is fitted into the opening 142 so that each through hole 143 faces the corresponding screw hole 149, and a fixing member (screw 150) is inserted into each through hole 143. The screw 150 may be screwed into the screw hole 149. By removing the screw 150, the lid member 144 can be removed from the sole portion 140 (lid member support portion 146) of the head body. Thus, the lid member 144 can be detachably attached to the sole portion 140 (lid member support portion 146) of the head main body. The screw hole 149 may pass through the support pieces 148a, 148b, and 148c as in the illustrated embodiment, but does not necessarily have to pass through.

  As shown in FIGS. 8 and 9, in one embodiment, a male engagement portion 141 is formed in the vicinity of one of the through holes 143 of the lid member 144. In the embodiment shown in FIGS. 8 and 9, the male engagement portion 141 is formed in the vicinity of the through hole 143 formed in the top portion closest to the face portion 120 among the three top portions of the lid member 144. A female engaging portion 147 that engages with the male engaging portion 141 is formed at a position facing the male engaging portion 141 of the lid member support portion 146. The female engaging portion 147 is hollow in the penetration direction (indicated by a two-dot chain line arrow in FIG. 9) in which the screw 150 penetrates the through hole 143. By engaging the male engaging portion 141 from the outside of the portion, the male engaging portion 141 is engaged.

  In the embodiment shown in FIGS. 8 and 9, the male engagement portion 141 has an inclined surface 141 a that faces the outside of the hollow portion of the head 100 (downward in FIG. 9). The female engaging portion 147 has an inclined surface 147a facing the inner side of the hollow portion (upward in FIG. 9) and facing the inclined surface 141a. The inclined surface 147a extends substantially parallel to the inclined surface 141a. According to this configuration, when the lid member 144 is fitted in the opening 142, the inclined surface 147a is in contact with the inclined surface 147a from the outside in the penetration direction of the screw 150. The female engaging portion 147 is engaged. In another embodiment, the male engagement portion 141 may have a first vertical surface that extends in a direction substantially perpendicular to the penetration direction of the screw 150 and faces outward of the hollow portion of the head 100. At this time, the female engagement portion 147 has a second vertical surface that extends in a direction substantially perpendicular to the penetration direction of the screw 150 and faces the inside of the hollow portion of the head 100. Then, when the second vertical surface comes into contact with the first vertical surface from the outside in the penetration direction of the screw 150, the male engagement portion 141 and the female engagement portion 147 are engaged.

  When the male engaging portion 141 of the lid member 144 is fitted into the female engaging portion 147, the inclined surface 147a of the female engaging portion 147 is placed on the inclined surface 141a of the male engaging portion 141 outside the hollow portion in the direction in which the screw 150 passes. Contact from the side. Thereby, since the movement of the screw 150 in the penetrating direction is restricted, the lid member 144 can be reliably held on the sole portion 140 even if the screw 150 is loosened due to impact or the like at the time of hitting a ball. .

  In this way, by engaging the male engagement portion 141 of the lid member 144 with the female engagement portion 147 of the lid member support portion 146, the lid member 144 is disengaged from the head 100 in the direction in which the screw 150 penetrates. The lid member 144 can be securely held on the lid member support portion 146. Even if the screw 150 is loosened, the movement of the lid member 144 in the penetrating direction of the screw 150 is restricted, so that the generation of noise due to the rattling of the lid member 144 can be suppressed. In addition, the lid member 144 is configured in a triangular shape, and the male engagement portion 141 is provided only at one of the top portions, so that the lid member 144 can be easily attached and detached. Since the lid member 144 in the above embodiment is convexly curved outward of the hollow portion of the head 100, the force is smaller than that in the case of using a flat lid member described in Japanese Patent Application Laid-Open No. 2007-136068. It is easy to buckle (bend) and deform. Therefore, the present invention is preferably applied to prevent the lid member 144 from falling off due to this deformation. Note that the male engagement portion 141 and the female engagement portion 147 do not need to be in constant contact, and need only be arranged to engage at least when the screw 150 is loosened. Therefore, when the lid member 144 is sufficiently fixed to the lid member support portion 146 with the screw 150, the opposing surfaces of the male engagement portion 141 and the female engagement portion 147 do not need to contact each other.

  In the above embodiment, the lid member 144 is formed in a substantially triangular shape having three apexes, and is screwed to the lid member support portion 146 at each apex, and the male engagement portion 141 is It is provided only on one of the three tops. According to such a configuration, the lid member 144 can be securely fixed to the lid member support portion 146 at three points, and the design and manufacture are facilitated as compared with the aspect in which the screws are fastened at four or more locations. Further, since the engaging portion (portion where the male engaging portion 141 and the female engaging portion 147 engage) is also provided at only one place, the manufacturing is easy.

  Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 11 is a bottom view of the head of this embodiment. 12 is a cross-sectional view taken along the line AA of the head of FIG. 13 is a cross-sectional view of the head of FIG. 11 taken along the line BB.

  In the head 200 of this embodiment, the opening 242 is formed at a position shifted from the center of the sole portion 240. Therefore, the lid member 244 is also attached at a position shifted from the center of the sole portion 240. The lid member support portion 246 is formed on the inner peripheral surface of the opening 242 in the same manner as the lid member support portion 146. The opening 242 is formed in a substantially triangular shape, like the opening 142 described above. As shown in FIG. 12, the lid member 244 is made of a plate-like member that is curved outwardly from the head 200. Similar to the lid member 144, the lid member 244 is formed with three through holes that receive the screws 250a, 250b, and 250c, respectively.

  As shown in FIGS. 12 and 13, among the three through holes of the triangular lid member 244, a position corresponding to a triangular side between the through hole that receives the screw 250 a and the through hole that receives the screw 250 b, A male engagement portion 241 is formed. In one embodiment, the male engaging portion 241 is formed to have an inclined surface facing outward of the hollow portion of the head 200, similar to the male engaging portion 141. A female engaging portion 247 that engages with the male engaging portion 241 is formed at a position facing the male engaging portion 241 of the lid member support portion 246. The female engaging portion 247 abuts on the male engaging portion 241 from the outer side of the hollow portion in the screw penetration direction (indicated by a two-dot chain line arrow in FIG. 12), so that the male engaging portion 241 is engaged.

  In the head 200 of the present embodiment, by engaging the male engagement portion 241 of the lid member 244 with the female engagement portion 247 of the lid member support portion 246, the lid member 244 is moved from the head 200 in the screw penetration direction. Since the engagement / disengagement is not performed, the lid member 244 can be reliably held on the lid member support portion 246. Further, in the head 200, the lid member 244 is provided at a position shifted from the center of the sole portion 240, so that the lid member 244 is less likely to be detached from the lid member support portion 246 due to the impact of the hit ball. Further, in the present embodiment, since the male engagement portion 241 is provided in a portion corresponding to the triangular side of the triangular lid member 244, the lid member 242 is more securely prevented from coming off than when only the top portion is engaged. be able to.

  Next, still another embodiment of the present invention will be described with reference to FIGS. FIG. 14 is a bottom view of the head of this embodiment. FIG. 15 is a cross-sectional view of the head of FIG. 14 taken along line AA.

  In the head 300 of this embodiment, the opening 342 is formed in a substantially square shape, and the lid member 344 is also formed in a square shape that is suitable for the opening 342. The lid member support portion 346 is formed on the inner peripheral surface of the opening 342 in the same manner as the lid member support portion 146. A through hole is formed in each of the four tops of the lid member 344. The lid member 344 is fixed to the lid member support portion 346 with four screws through the through hole.

  Furthermore, in the head 300 of the present embodiment, an impact buffering portion 350 is formed on the inner peripheral surface (hollow portion side surface) of the sole portion 340. The impact buffering part 350 is formed in the sole part 340 in a region between the face part 120 as a hitting part and the fixing position of the lid member 344. As shown in FIG. 15, the impact buffering portion 350 is a protrusion that protrudes inward of the hollow portion from the inner peripheral surface (the hollow portion side surface) of the sole portion 340. In one embodiment, the impact buffering portion 350 extends substantially parallel to the face surface from the toe side of the sole portion 340 toward the heel side. In one embodiment, the impact buffering portion 350 is configured such that its length is longer than the overall size of the lid member 344, in particular, the size (width) in a direction substantially parallel to the face portion 120 (face surface). .

  In the head 300 of the present embodiment, the lid member 344 is formed in a substantially quadrangular shape, and the four top portions are fixed with four screws, so that the lid member 344 can be reliably held on the lid member support portion 346. In addition, since the opening 342 has a substantially square shape, a wider opening area can be secured, and the workability of installing the weight adjusting material can be improved. Further, in the head 300 according to the present embodiment, the shock buffering portion 350 is provided in the region between the face portion 120 where the impact of the hit ball is generated and the lid member 344. 350, and deformation of the portion around the lid member 344 of the sole portion 340 is suppressed. Thereby, it can prevent that the cover member 344 remove | deviates by the impact of a hit ball. Further, since the impact caused by the hit ball does not escape to the lid member 344 side, hit ball with a stronger repulsive force can be expected. Furthermore, when using a weight adjusting material having fluidity such as a resin by the shock absorbing portion 350, the weight adjusting material attached to the periphery of the lid member 344 flows into the face portion 120 side unintentionally, It is possible to prevent the weight adjusting material attached to a position away from the lid member 344 from flowing into the lid member 344 side.

  Next, still another embodiment of the present invention will be described with reference to FIGS. FIG. 16 is a bottom view of the head of this embodiment. 17 is a cross-sectional view taken along the line AA of the head of FIG. 18 is a cross-sectional view of the head of FIG. 16 taken along the line BB. FIG. 19 is a partially enlarged view of FIGS. 17 and 18. FIG. 20 is a diagram illustrating the pressing member.

  As in the above embodiments, the male engagement portion 441 is formed on the lid member 444 of the head 400, and the female engagement portion 447 formed on the sole portion 440 is on the outer side of the hollow portion in the screw penetration direction. The lid member 444 is fixed to the sole portion 440 so as to prevent it from coming into contact with the male engaging portion 441.

  In the head 400 of this embodiment, an opening 442 is formed in the sole portion 440. The shock absorbing portion 450 is formed at the front edge of the opening forming surface 440a where the opening 442 is formed in the sole portion 440, and the shock absorbing portion 451 is formed at the rear edge of the opening forming surface 440a. Is formed. The impact buffering portion 450 is a protrusion that protrudes inward of the hollow portion from the inner peripheral surface (hollow portion side surface) of the sole portion 440. As shown in FIG. 17, a groove extending in parallel with the protrusion is formed in a portion of the outer surface of the sole portion 440 opposite to the hollow portion side surface where the protrusion is provided. The shock absorbing portion 450 is a protrusion having a U-shaped cross section that defines the groove, and extends substantially linearly in a direction substantially parallel to the outer surface (face surface) of the face portion 120. The impact buffering portion 450 is configured such that its length is longer than the overall size of the lid member 444, in particular, the size (width) in a direction substantially parallel to the outer surface (face surface) of the face portion 120. The impact buffer 450 extends from the toe side end to the heel side end. On the other hand, in the sole portion 440, at the rear edge of the opening forming surface 440a, an inclined portion inclined with respect to the opening forming surface 440a is impacted in a region between the fixing position of the lid member 444 and the side portion 130. A buffer portion 451 is formed. The impact buffering portion 451 is located on the rear side of the opening 442 (or the lid member lid member 444 fitted in the opening 422) from a position slightly rearward of the impact buffering portion 450 at the toe side end of the sole surface 440. It extends to the heel side end of the sole surface 440 so as to go around. Thereby, the impact buffering portion 450 and the impact buffering portion 451 surround substantially the entire circumference of the lid member 444.

  As shown in FIGS. 19 and 20, a pressing member 460 made of an elastic member such as an elastomer formed in substantially the same shape as the lid member support portion 446 is provided on the outer peripheral surface of the lid member support portion 446. The pressing member 460 is provided between the lid member 444 and the lid member support portion 446. The pressing member 460 repels the pressing force from the lid member 444 and presses the lid member 444 from the inside of the head 400 toward the outside along the screw penetration direction. As a result, the male engaging portion 441 of the lid member 444 is constantly urged by the female engaging portion 447 of the sole portion 440, so that the generation of noise due to the collision between the lid member 444 and the sole portion 440 is suppressed. Can do.

  In the head 400 of this embodiment, the shock buffering portion 450 and the shock buffering portion 451 surround the substantially entire circumference of the lid member 444, so that the deformation of the face portion 120 during hitting is transmitted to the lid member 444. It can suppress more reliably.

  Next, still another embodiment of the present invention will be described with reference to FIGS. FIG. 21 is a bottom view of the head of this embodiment. 22 is a cross-sectional view of the head of FIG. 21 taken along the line AA. FIG. 23 is an explanatory diagram of an impact buffering portion.

  In the head 500 of this embodiment, an impact buffering portion 550 is formed in a region between the face portion 120 that is a hitting ball portion and a fixing position of the lid member 544 in the sole portion 540. The impact buffering portion 550 is a protrusion that protrudes inward of the hollow portion from the inner peripheral surface (hollow portion side surface) of the sole portion 540. As shown in FIG. 22, a groove extending in parallel with the protrusion is formed in a portion of the outer surface of the sole portion 540 opposite to the hollow portion side surface where the protrusion is provided. The shock absorbing portion 550 is a protrusion having a U-shaped cross section that defines the groove. The shock absorbing portion 550 extends substantially linearly in a direction substantially parallel to the outer surface (face surface) of the face portion 120. The impact buffering portion 550 is configured such that its length is longer than the overall size of the lid member 544, in particular, the size (width) in a direction substantially parallel to the outer surface (face surface) of the face portion 120.

  For example, as shown in FIG. 23, when a narrow groove is formed in the sole portion, the periphery of the groove, particularly the central portion in the toe-heel direction, may be greatly deformed by the impact of the hit ball. . Therefore, the load due to the impact of the hit ball is concentrated near the center of the sole portion, and a large load acts on the lid member provided near the center of the sole portion.

  On the other hand, in the head 500, since a relatively wide groove is formed in the sole portion 540, the deformation of the face portion 120 at the time of hitting is blocked by the groove (or the impact buffering portion 550). The transmission of the deformation of the face portion 120 to the lid member 544 can be suppressed.

  The present invention is not limited to the above-described embodiment, and various modifications of the above-described embodiment are also included in the scope of the present invention. For example, the opening formed in the sole portion may be disposed at a position other than the position explicitly described in this specification. Such an opening can be provided not only in the sole part 140 but also in at least one of the crown part, the face part, and the side part. A plurality of such openings may be formed. In this case, one lid member is detachably attached to each of the plurality of openings.

  The shape of the opening can be any shape including a circular shape, a rectangular shape, a polygonal shape, and the like.

  The lid member may be fixed to the lid member support portion using a known fixing member other than a screw.

  The impact buffering part may be formed integrally with the sole part or may be prepared separately from the sole part. The shock absorbing portion prepared separately from the sole portion is fixed to the sole portion with an adhesive or a double-sided tape. Moreover, the impact buffering part can be made into various shapes, for example, it may consist of a combination of a ridge and an inclined part.

  A convex portion extending along the outer periphery (at least a part or all of the placement region) of the placement region in order to ensure that the weight adjusting material such as resin is disposed in the placement region assumed in the head 100. The entire arrangement area may be formed as a recess so that the entire arrangement area is positioned below the area surrounding the arrangement area.

  As the weight adjusting material, any material including a resin, an adhesive, a seal (a seal to which a weight is attached), an elastic body, a metal material, and the like can be used. Note that the elastic body, the metal material, and the like can be fixed to the inner surface of the head 100 with an adhesive, a double-sided tape, or the like.

  The center of gravity, moment of inertia, and / or hitting ball of the head 100 can be changed by changing the material and / or thickness of the lid member 144 instead of or by arranging the weight adjusting material. You can also adjust the sound. That is, a plurality of lid members having different materials and / or thicknesses (that is, a plurality of lid members having different masses) are prepared, and a user selects a lid member selected from the plurality of lid members. You may make it attach to the head 100. FIG. In addition, as a material which comprises a cover member, the arbitrary materials containing carbon, a magnesium alloy, an aluminum alloy, a titanium alloy, a stainless steel alloy, a tungsten alloy etc. are mentioned, for example.

Instead of arranging the weight adjusting material, or by arranging the weight adjusting material and changing the material and / or length of the screw for fixing the lid member 144 to the head 100, the center of gravity of the head 100, The moment of inertia and / or the hitting sound can be adjusted. That is, a plurality of screws having different materials and / or lengths (that is, a plurality of screws having different masses) are prepared, and a user uses a screw selected from the plurality of screws to cover the screw. The member 144 may be fixed to the head 100. The material constituting the screw includes any material including carbon, magnesium alloy, aluminum alloy, titanium alloy, stainless alloy, tungsten alloy and the like.

  At least one inner surface (part or all) of the crown portion 110, the face portion 120, the side portion 130, and the sole portion 140 may be mirror-finished. Thereby, for example, when an opening is formed in the sole part 140, the mirror part 110, the face part 120 and / or the side part 130, which are mirror-finished, are reflected on the inner surface through the opening. By looking at a person's finger (hand), a device such as a nozzle, and / or a weight adjusting material, the weight adjusting material can be more easily and accurately placed at an intended position in the head 100.

  In each embodiment, a large titanium head is mainly used as an example, but even a fairway wood or utility head less than 380 CC has a minimum thickness of 1.0 mm or less. It is valid. Further, the minimum thickness portion is not limited to the sole, and may be in the face, crown, or side portion.

100, 200, 300, 400, 500 Golf club head (head)
110 Crown part 120 Face part 130 Side part 140, 240, 340, 440, 540 Sole part 141, 241, 341, 441, 541 Male engaging part 142, 242, 342, 442, 542 Opening part 144, 244, 344, 444, 544 Lid member 146, 246, 346, 446, 546 Lid member support part 147, 247, 347, 447, 547 Female engaging part 150, 250a, 250b, 250c Screw 350, 450, 451, 550 Shock absorbing part 460 Press member

Claims (6)

A hollow part surrounded by a crown part, a face part, a side part and a sole part;
An opening of at least a human finger formed in the sole portion so as to communicate with the hollow portion;
A lid member support provided on the inner peripheral surface of the opening;
A lid member that is supported by the lid member support part so as to cover the opening, and is curved outwardly of the hollow part;
A fixing member that penetrates through the lid member and is fixed to the lid member support portion to detachably fix the lid member to the lid member support portion, and
The lid member is formed in a substantially triangular shape having three tops,
A first engagement portion is formed only on one of the three top portions of the lid member,
The lid member support portion engages with the first engagement portion by contacting the first engagement portion from the outer side of the hollow portion in the penetrating direction through which the fixing member penetrates the lid member. A second engagement portion is formed;
Golf club head. The first engagement portion has a first surface facing outward of the hollow portion,
The second engaging portion has a second surface that faces inward of the hollow portion and contacts the first surface from the outer side of the hollow portion in the penetration direction.
The golf club head according to claim 1. The first surface extends in a direction inclined with respect to the penetrating direction, and the second surface extends substantially parallel to the first surface;
The golf club head according to claim 2. A pressure member that is disposed between the lid member and the lid member support portion and presses the lid member to the opposite side of the lid member support portion;
The golf club head according to claim 1. Provided in the sole portion, further comprising an impact buffering portion for buffering the impact of the hit ball,
The golf club head according to claim 1. Grip,
A shaft coupled to the grip;
A golf club head coupled to the shaft via a hosel,
The golf club head is
A hollow part surrounded by a crown part, a face part, a side part and a sole part;
An opening of at least a human finger formed in the sole portion so as to communicate with the hollow portion;
A lid member support provided on the inner peripheral surface of the opening;
A lid member that is supported by the lid member support part so as to cover the opening, and is curved outwardly of the hollow part;
A fixing member that penetrates through the lid member and is fixed to the lid member support portion to detachably fix the lid member to the lid member support portion, and
The lid member is formed in a substantially triangular shape having three tops,
A first engagement portion is formed only on one of the three top portions of the lid member,
The lid member support portion engages with the first engagement portion by contacting the first engagement portion from the outer side of the hollow portion in the penetrating direction through which the fixing member penetrates the lid member. A second engagement portion is formed,
Golf club.