JP6642687B2 - Golf club head - Google Patents

Description

  The present invention relates to a golf club head, and more particularly to a golf club head having a face portion provided with a face plate via an elastic body.

  As is well known, an iron-type golf club head has a face portion having a flat face surface, and a hosel portion connected to the heel side of the face portion, and a shaft insertion hole is provided in the hosel portion. . The shaft is inserted into the shaft insertion hole and fixed by an adhesive.

  Patent Literature 1 describes a golf club head in which a striking surface plate is attached to a striking surface position of a head body by an impact absorbing layer.

  Patent Document 2 describes a head in which an intermediate layer made of a cushioning material is interposed on the face side of a head body.

  As a wood type golf club head such as a driver or a fairway wood, a hollow metal one is widely used. Generally, a hollow wood type golf club head has a face portion for hitting a ball, a crown portion forming an upper surface portion of the golf club head, a sole portion forming a bottom portion of the golf club head, and a golf club. The head has side portions constituting side portions on the toe side, the back side, and the heel side, and a hosel portion. Aluminum alloy, stainless steel and titanium alloy are used as the metal constituting the hollow golf club head. In the case of a driver, in recent years, titanium alloy has been particularly widely used.

  Patent Document 3 describes a golf club head having an elastic layer provided on a face portion of a head body and a fiber-reinforced resin layer covering the surface of the elastic layer.

Utility model registration 3091025 58-166365 JP-A-5-305161 JP 2006-198327 JP-A-01-131682 JP-A-61-13984

  It is an object of the present invention to provide a golf club head in which a face plate slides upward or downward when a ball hits, thereby reducing or increasing the backspin amount.

  In the golf club head of the present invention, in a golf club head in which a face plate is provided on a head main body via an elastic body, the hardness of the material of the elastic body is 10 or more Shore A hardness and 80 or less Shore D hardness, The rear surface of the face plate is not parallel to the face surface of the head main body, and the rear surface of the face plate is parallel to the elastic body arrangement surface of the head main body.

  In the present invention, it is preferable that the thickness of the face plate be smaller toward the lower side.

  In the present invention, it is preferable that both the front surface and the rear surface of the face plate are flat, and the intersection angle θ between them is 2 ° or more and 70 ° or less.

  In the present invention, it is preferable that the thickness of the face plate be larger toward the lower side.

  In the present invention, the elastic body preferably has a uniform thickness.

  When the golf club head of the present invention is an iron-type golf club head, it is preferable that the upper edge of the elastic body is located lower than the upper edge of the face plate.

  In the golf club head of the present invention, the face plate is held on the face surface of the head body via an elastic body using a material having a Shore A hardness of 10 or more and a Shore D hardness of 80 or less, and the rear surface of the face plate is a head. The rear surface of the face plate is not parallel to the face surface of the main body, but the rear surface of the face plate and the elastic body arrangement surface of the head main body are parallel. When the ball is hit (that is, at the time of impact), the face plate slides upward or downward. Therefore, the backspin amount decreases or increases.

  When the thickness of the face plate is smaller at the lower side, the back tilt angle of the back of the face plate is larger and the amount of sliding of the face plate at impact is larger than when the face plate is of uniform thickness And the backspin amount decreases.

  On the other hand, when the thickness of the face plate is increased downward, the back surface of the face plate tilts forward and the face plate slides downward at the time of impact, so that the backspin amount increases.

It is a perspective view of the iron type golf club head concerning an embodiment. 1A is a sectional end view taken along the line II-II of FIG. 1, and FIG. 2B is a sectional view taken along the line II-II of FIG. FIG. 2 is an exploded perspective view of the golf club head of FIG. FIG. 2 is a rear view of the golf club head of FIG. 1. (A) is a perspective view of an iron type golf club head according to another embodiment, and (b) is a cross-sectional view taken along line BB of (a). It is a perspective view of the wood type golf club head concerning an embodiment. FIG. 7 is a sectional view taken along line VII-VII of FIG. 6. It is sectional drawing of the iron type golf club head concerning embodiment. It is sectional drawing of the iron type golf club head concerning embodiment. It is a perspective view of the wood type golf club head concerning an embodiment. It is a perspective view of the wood type golf club head concerning an embodiment. It is a block diagram of the board | substrate used for the experiment, (a), (b), (c) is a perspective view, (d), (e), and (f) are (a), (b), and (c). It is a DD line, EE line, FF line sectional view.

  An iron type golf club head 1 according to an embodiment of the first invention will be described with reference to FIGS.

  The iron-type golf club head 1 has a head body 10 having a concave portion 11 (FIG. 3) provided on a face portion, and a face plate 20 mounted on the concave portion 11 via an elastic body 30.

  In this embodiment, the head body 10 and the face plate 20 are made of an iron-based material such as stainless steel and soft iron. A hosel portion 12 is provided on the heel side of the head body 10.

  The golf club head 1 has a muscle back structure, and has a shape in which a lower portion of the head body 10 has a swelling. A central portion of the lower portion of the head body 10 in the toe-heel direction is a plate-like portion 14.

  The recess 11 is arranged at the center of the head body 10 in the toe-heel direction, and is provided from the upper end to the lower end of the head body 10. The width of the recess 11 in the toe-heel direction is uniform in the vertical direction. On the front side of the plate-like portion 14, the depth of the concave portion 11 becomes smaller toward the lower side.

  Above the plate-like portion 14, the recess 11 penetrates the head body 10 in the front-rear direction, so that the toe-side upright portion 15 and the heel-side upright portion 16 are provided on the toe side and the heel side of the recess 11 respectively. Are formed. With this penetrating structure, it is possible to prevent the thickness of the upper part of the head from becoming too large.

  The front surface of the plate-like portion 14 of the recess 11 is formed by an upwardly inclined surface. An elastic body 30 is arranged on the front surface of the plate-like portion 14. The face plate 20 is arranged on the front surface of the elastic body 30. The front surface of the plate portion 14 and the back surface of the face plate 20 are parallel. The elastic body 30 may be fixed to the front surface of the plate portion 14 and the back surface of the face plate 20 by an adhesive. The width of the face plate 20 in the toe-heel direction is equal to or slightly smaller than the width of the recess 11 in the toe-heel direction. When the face plate 20 is fixed so as to be in contact with only the elastic body 30 in a static state, a structure that can be more easily slid is obtained. When the face plate 20 is attached to the recess 11 via the elastic body 30, the upper edge and the lower edge of the face plate 20 are the same as the upper edge and the lower edge of the head main body 10. When the face plate 20 is mounted via the elastic body 30, the front surface of the face plate 20 and the front surfaces of the head body 10 on the toe side and the heel side are on the same plane. Although not shown, grooves (score lines) are provided on the front surface of the face plate 20.

  The rear surface of the face plate 20 is not parallel to the front surface of the face plate 20, but is inclined (rearward). The lower limit of the inclination angle of the back surface of the face plate 20 with respect to the front surface of the face plate 20 is 2 ° or more, preferably 10 ° or more, and the upper limit is 70 ° or less, preferably 60 ° or less. If the inclination angle is too small, it may be difficult to obtain the sliding effect, and if it is too large, the head design may be affected, such as the head weight becoming too heavy.

  The thickness of the face plate 20 gradually decreases from the upper edge to the lower edge. The lower limit of the thickness of the face plate 20 at the lower edge of the face plate 20 is 1 mm or more, preferably 3 mm or more, and the upper limit is 7 mm or less, preferably 5 mm or less. If the thickness of the face plate 20 is too small, the strength may be insufficient. If the thickness is too large, the slide effect may be reduced or the head weight may be too heavy, which may affect the head design. is there. There is no particular limitation on the width of the recess 11 and the face plate 20 in the toe-heel direction, but the lower limit is 10 mm or more, preferably 20 mm or more, and the upper limit is 100 mm or less.

  The hardness of the material of the elastic body 30 is a Shore A hardness of 10 or more, preferably 30 or more, as a lower limit, and a Shore D hardness of 80 or less, preferably 70 or less, as an upper limit. If the hardness is too low, the adhesive strength between the face plate and the head body may decrease, and if the hardness is too high, the slide effect may not be obtained. Examples of the material of the elastic body 30 include a material made of rubber or resin. Examples of the rubber include natural rubber, polybutadiene rubber, styrene butadiene rubber, isoprene rubber and the like. Examples of the resin include an ionomer resin, a urethane resin, a polyester resin, and a polyamide resin. In particular, urethane resins are preferred. The thickness of the elastic body 30 is 0.1 mm or more as a lower limit, preferably 0.3 mm or more, and 5 mm or less, preferably 3 mm or less as an upper limit. If the thickness is too small, it may be difficult to obtain a sliding effect, and if it is too large, the initial velocity of the golf ball may be too low. In this embodiment, the thickness of the elastic body 30 is uniform as a whole, but the thickness may be partially different.

  In the golf club having the golf club head 1 configured as described above, the elastic body 30 is sheared and deformed along the concave portion 11 at the time of impact of hitting a ball, and the face plate 20 slides upward. That is, since the rear surface of the face plate 20 is inclined backward by the angle θ from the front surface, the face plate 20 can easily slide upward along the recessed portion 11 at the time of impact. As a result, the amount of back spin generated in the ball decreases, and the flight distance increases. The iron-type golf club of this embodiment can increase the flight distance by reducing the backspin amount by using the iron-type golf club for a middle iron or a long iron head.

  A golf club head 1A according to another embodiment will be described with reference to FIG. In this golf club head 1A, both side end faces 21 of the face plate 20A are tapered surfaces that are inclined such that the width of the face plate 20A in the toe-heel direction becomes smaller toward the front side. Both side surfaces of the concave portion 11 of the head main body 10 are also in an undercut shape engaged with the concave portion. This prevents the face plate 20A from falling off in the direction perpendicular to the face surface.

  Although not shown, a convex ridge is provided on the trailing edge side of both side surfaces of the face plate in the toe-heel direction, and a concave ridge is provided in the recess 11 so that the convex slidable engagement is provided. The plate may be prevented from falling off.

  Further, other than these, means for coupling the face plate and the head main body may be provided so as not to significantly affect the vertical sliding of the face plate. For example, the face plate, the elastic body, and the head body may be connected by screws at the toe end and the heel end.

  Although the above embodiments relate to iron type golf club heads, the present invention is also applicable to wood type golf club heads and utility type golf club heads. 6 and 7 show a wood type golf club head 40. FIG. The golf club head 40 is a hollow driver head, and has a face portion 40a, a crown portion 40b, a sole portion 40c, a side portion 40d, and a hosel portion 40e.

  The golf club head 40 includes a head body 41, an elastic body 42, and a face plate 43. The head body 41 and the face plate 43 are made of a titanium alloy, but are not limited thereto.

  The face portion 40a is provided with a concave portion 44 extending in the vertical direction. The elastic member 42 is disposed in the concave portion 44, and the face plate 43 is disposed on the front surface of the elastic member 42. The arrangement surface of the elastic body 42 in the head main body 41 and the back surface of the face plate 43 are parallel to each other. The elastic body 42 may be fixed to the elastic body arrangement surface of the head main body 41 and the back surface of the face plate 43 by an adhesive. The face plate 43 and the recess 44 extend from the crown 40b to the sole 40c.

  The back surface of the face plate 43 is not parallel to the front surface of the face plate 43, but is inclined (backward inclined). The lower limit of the inclination angle of the back surface of the face plate 43 with respect to the front surface of the face plate 43 is 2 ° or more, preferably 10 ° or more, and the upper limit is 70 ° or less, preferably 60 ° or less. If the inclination angle is too small, the effect of sliding may not be obtained, and if it is too large, the head design may be affected, such as the head weight becoming too heavy.

  The depth of the recessed portion 44 decreases as it goes downward. The face plate 43 has a smaller thickness toward the lower side. The width of the face plate 43 in the toe-heel direction is equal to or slightly smaller than the width of the recessed portion 44 in the toe-heel direction. When the face plate 43 is fixed so as to be in contact with only the elastic body 42 in a static state, a structure that can be more easily slid is obtained.

  Regarding the width of the face plate 43 and the concave portion 44, the lower limit is 10 mm or more, preferably 20 mm or more, and the upper limit is 120 mm or less. The thickness of the elastic body 42 is uniform as a whole. The thickness of the elastic body 42 is 0.1 mm or more, preferably 0.3 mm or more as a lower limit, and 5 mm or less, preferably 3 mm or less as an upper limit. If the thickness is too small, it may be difficult to obtain a sliding effect, and if it is too large, the initial velocity of the golf ball may be too low.

  When the face plate 43 is mounted via the elastic body 42, the front surface of the face plate 43 and the front surfaces of the head body 41 on the toe side and the heel side are on the same plane. In this embodiment, the thickness of the elastic body 42 is uniform as a whole, but the thickness may be partially different.

  Even when a golf club having the golf club head 40 hits a ball, the face plate 43 slides upward at the time of impact, so that the backspin amount of the ball decreases and the flight distance increases.

  Referring to FIG. 8, an iron type golf club head 1B according to an embodiment of the second invention will be described.

  The iron-type golf club head 1B has a head body 10B having a concave portion 11 provided on a face portion, and a face plate 20B mounted on the concave portion 11 of the head body 10B via an elastic body 30. The thickness of the upper portion 22 of the face plate 20B is substantially uniform in the vertical direction. The thickness of the lower portion 23 of the face plate 20B gradually decreases upward from the lower edge. The thickness of the lower portion 23 at the lower edge of the face plate 20B is not particularly limited, but the lower limit is 1.5 mm or more, preferably 3 mm or more, and the upper limit is 15 mm or less, preferably 10 mm or less. The thickness of the upper portion 22 at the upper edge of the face plate 20B is not particularly limited, but the lower limit is 1 mm or more, preferably 2 mm or more, and the upper limit is 5 mm or less, preferably 4 mm or less.

  The front surface of the plate-like portion 14 of the recess 11 is a downwardly inclined surface. An elastic body 30 is arranged on the front surface of the plate-like portion 14. The lower part 23 of the face plate 20B is arranged on the front surface of the elastic body 30. The front surface of the plate portion 14 and the back surface of the lower portion 23 are parallel. The elastic body 30 may be fixed to the front surface of the plate portion 14 and the back surface of the lower portion 23 by an adhesive.

  The vertical length of the back surface of the lower portion 23 is greater than the vertical length of the front surface of the plate portion 14, a space S is provided between the upper portion 22 and the plate portion 14, and the face plate 20B is When sliding, the plate portion 14 and the elastic body 30 do not come into contact with the upper portion 22.

  The back surface of the lower portion 23 is not parallel to the front surface of the face plate 20B, but is inclined (forwardly inclined). Regarding the inclination angle of the back surface of the lower portion 23 with respect to the front surface of the face plate 20B, the lower limit is 2 ° or more, preferably 10 ° or more, and the upper limit is 70 ° or less, preferably 60 ° or less. If the inclination angle is too small, the slide effect may not be obtained, and if it is too large, the head design may be affected, such as the head weight becoming too heavy.

  Other configurations of the golf club head 1B are the same as those of the golf club head 1 or 1A.

  In the golf club having the golf club head 1B configured as described above, since the front surface of the plate-shaped portion 14 is a downwardly inclined surface, the elastic body 30 is placed in the concave portion 11 at the time of impact of hitting the ball. And the face plate 20B slides slightly downward. That is, since the rear surface of the lower portion 23 of the face plate 20B is inclined more forward than the front surface, the face plate 20B can easily slide downward along the recess 11 at the time of impact. As a result, the amount of back spin generated in the ball increases, and the ball easily stops. When the iron-type golf club of this embodiment is used for a head of a short iron or a middle iron, the backspin amount increases, and it becomes easy to stop the ball near a drop point.

  A golf club head 1B 'according to another embodiment will be described with reference to FIG. The golf club head 1B 'has a hollow structure in which a hollow portion 25 is provided in a lower portion 23' of the face plate 20B ', so that the weight of the face plate 20B' is reduced. The same effect as that of the golf club head 1B can be obtained with the golf club head 1B '.

  8 and 9 relate to an iron type golf club head, the second invention can be applied to a wood type golf club head and a utility type golf club head. 10 and 11 show wood type golf club heads 40A and 40B. The golf club head 40A has a solid face plate 43A. The golf club head 40B has a hollow structure in which a hollow portion 48 is provided in the face plate 43B, so that the weight of the face plate 43B is reduced.

  The golf club heads 40A, 40B are composed of head bodies 41A, 41B, elastic bodies 42A, 42B, and face plates 43A, 43B. The head main bodies 41A and 41B and the face plates 43A and 43B are made of a titanium alloy, but are not limited thereto. The hardness of the material of the elastic bodies 42A and 42B is a Shore A hardness of 10 or more, preferably 30 or more as a lower limit, and a Shore D hardness of 80 or less, and preferably a Shore D hardness of 70 or less as an upper limit.

  The face surfaces of the head bodies 41A and 41B are formed as downward inclined surfaces. Recesses 44A, 44B extending in the vertical direction are provided on the face surface, and elastic bodies 42A, 42B are arranged in the concave parts 44A, 44B, and face plates 43A, 43B are provided on the front surfaces of the elastic bodies 42A, 42B. Are located. The arrangement surface of the elastic bodies 42A and 42B in the head main bodies 41A and 41B is parallel to the back surfaces of the face plates 43A and 43B. The elastic members 42A and 42B may be fixed to the elastic member disposing surfaces of the head main bodies 41A and 41B and the back surfaces of the face plates 43A and 43B by an adhesive. The face plates 43A, 43B and the recesses 44A, 44B extend from the front edge of the crown 40b to the front edge of the sole 40c.

  The depths of the recessed portions 44A and 44B are larger toward the lower side. The thickness of the face plates 43A and 43B is smaller toward the upper side. The back surfaces of the face plates 43A and 43B are not parallel to the front surfaces of the face plates 43A and 43B, but are inclined (forwardly inclined). The face plate 43A has a solid structure, and the face plate 43B has a hollow structure having a hollow portion 48.

  Even when a ball is hit with a golf club having the golf club heads 40A and 40B, the face plates 43A and 43B slide downward at the time of impact, so that the backspin amount of the ball increases and the ball easily stops. When the wood type golf club heads 40A and 40B of this embodiment are used for fairway wood, the backspin amount increases, so that the ball can be easily stopped.

[Experiment 1]
A rectangular plate 50 (80 mmW × 80 mmH × 5.8 mmt) made of titanium shown in FIGS. It was fixed on a base (not shown). A golf ball (“X01z” or “2013 PYZ” manufactured by Bridgestone Sports Co., Ltd.) was made to collide with the front surface of this titanium plate at a speed of 43 m / s, and the initial speed, launch angle and spin amount of the rebounded ball were measured. It was measured. Table 1 shows the results. The angle α was set to 5 °, 10 ° or 15 ° (only 5 ° in the case of PHYZ).

[Experiment 2]
As shown in FIGS. 12B and 12E, a composite plate 60 having the same dimensions as the titanium plate 50 was used, in which titanium plates 61 and 62 were bonded via a resin plate 63 having a thickness of 0.5 mm. The composite plate 60 was fixed with the front surface 60a inclined backward in the same manner as in Experiment 1, and the ball was collided in the same manner, and the initial velocity, launch angle and spin rate of the rebounded ball were measured. The angle α was set to 5 °. Table 1 shows the results. As the resin plate 63, a urethane resin plate having a Shore D hardness of 30 or a urethane resin plate having a Shore D hardness of 68 was used. An epoxy-based adhesive was used for bonding the titanium plates 61 and 62 and the resin plate 63.

  The titanium plates 61 and 62 have the same shape, and the angle of the bonding surface to the composite plate front surface 60a is 15 °. Note that the bonding surface is downward when the front surface of the composite plate is vertical, and is inclined 15 ° forward (−15 ° backward) with respect to the vertical plane.

  In the collision experiment, since the composite plate front surface 60a is inclined backward by an angle α = 5 ° with respect to the vertical plane, the rear inclination angle of the resin plate front surface (laminated surface) is −10 ° (= α−15 °). ). A negative rearward tilt angle of the front surface of the resin plate indicates that the front surface of the resin plate is downward.

[Experiment 3]
As shown in FIGS. 12 (c) and 12 (f), a composite plate 70 in which titanium plates 71 and 72 were bonded via a resin plate 73 having a thickness of 0.5 mm was used in the same manner as in Experiment 2. The initial speed, launch angle β and spin amount of the rebounded ball were measured. The angle α was set to 5 °, 10 ° or 15 ° (only 5 ° in the case of PHYZ). Table 1 shows the results.

  The composite plate 70 has the same material and the same structure except that the composite plate 60 shown in FIGS. 12B and 12E is turned upside down. When the front surface 70a of the composite plate 70 is vertical, the bonding surface is upward from the vertical surface, and the angle is 15 °.

  In the collision experiment, since the composite plate front surface 70a is inclined backward by an angle α = 5 °, 10 ° or 15 ° with respect to the vertical plane, the rear inclination angle of the resin plate front surface (laminated surface) is 20 °, 25 ° or 30 ° (= α + 15 °). The positive rearward inclination angle of the front surface of the resin plate indicates that the front surface of the resin plate is upward.

  As shown in Table 1, when the resin plate has the post-tilt structure shown in FIG. 12C, the spin amount is small and the launch angle is large as compared with the single plate structure shown in FIG. On the other hand, when the resin plate has the forward inclined structure of FIG. 12B, the spin amount is larger than that of the single plate structure of FIG.

  From the above, it is supported that the spin amount is reduced by using the first invention structure (the inclined structure after the resin plate), and the spin amount is increased by using the second invention structure (the inclined structure before the resin plate). .

1, 1A, 1B, 1B ', 40, 40A, 40B Golf club head 10, 10B, 10B', 41, 41A, 41B Head body 11, 44, 44A, 44B Concave portions 20, 20A, 20B, 20B ', 43 , 43A, 43B Face plate 30, 42, 42A, 42B Elastic body

Claims (6)

In a wood type golf club head in which a face plate is provided on a head body via an elastic body,
A concave portion extending vertically is provided in the face portion,
In the recess, a face plate is provided via an elastic body,
The hardness of the material of the elastic body is 10 or more Shore A hardness and 80 or less Shore D hardness.
The rear surface of the face plate is not parallel to the face surface of the head body,
Ri parallel der the elastic body disposed surface of the face and the head main body after said face plate,
The golf club head according to claim 1, wherein the thickness of the face plate becomes smaller toward the upper side .   2. The golf club head according to claim 1, wherein the face plate and the recess extend from the crown to the sole. 3. The golf club head according to claim 1, wherein the front surface of the face plate and the front surfaces of the head body on the toe side and the heel side are on the same plane. 4. The golf club head according to any one of claims 1 to 3 , wherein the head body and the face plate are made of a titanium alloy. In any one of claims 1 to 4, wherein the face plate, a golf club head, characterized by being fixed to contact only the elastic member in a static state. The golf club head according to any one of claims 1 to 5, wherein the face plate has a hollow structure having a hollow portion.

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