CN114425146A - Iron type golf club head - Google Patents

Iron type golf club head Download PDF

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Publication number
CN114425146A
CN114425146A CN202111196410.4A CN202111196410A CN114425146A CN 114425146 A CN114425146 A CN 114425146A CN 202111196410 A CN202111196410 A CN 202111196410A CN 114425146 A CN114425146 A CN 114425146A
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CN
China
Prior art keywords
golf club
club head
circle
rib
center
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Granted
Application number
CN202111196410.4A
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Chinese (zh)
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CN114425146B (en
Inventor
齐藤史弥
长井康晴
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Yamaha Corp
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Yamaha Corp
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Publication of CN114425146A publication Critical patent/CN114425146A/en
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Publication of CN114425146B publication Critical patent/CN114425146B/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/045—Strengthening ribs
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0408—Heads characterised by specific dimensions, e.g. thickness
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0416—Heads having an impact surface provided by a face insert
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0416—Heads having an impact surface provided by a face insert
    • A63B53/042—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0416—Heads having an impact surface provided by a face insert
    • A63B53/042—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head
    • A63B53/0425—Heads having an impact surface provided by a face insert the face insert consisting of a material different from that of the head the face insert comprising two or more different materials
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0433—Heads with special sole configurations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/047—Heads iron-type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
    • A63B2102/32—Golf

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)

Abstract

The invention provides an iron type golf club head capable of sufficiently improving a hitting feeling. An aspect of the present invention provides an iron-type golf club head (10) including a face (1) and a sole (2) extending rearward from a lower edge of the face (1), wherein the utility model is provided with a reinforcing rib (8) which is connected with the rod bottom part (2) and is arranged on the back surface of the rod surface part (1), the reinforcing rib (8) extends from the rod bottom part (2) to a long circular area which is formed by a first circle, a second circle and two line segments, the radius of the first circle is 10mm, the centroid of the back surface (1b) of the face part (1) or the projection point of the centroid of the front surface (1a) of the face part (1) onto the back surface (1b) is taken as the center, the radius of the second circle is 10mm, two line segments are parallel to each other and circumscribe a first circle and a second circle with a projection point of the center of gravity of the golf club head (10) onto the back surface (1b) as a center.

Description

Iron type golf club head
Technical Field
The present invention relates to an iron type golf club head.
Background
As the quality required for the iron type golf club head, a good hitting feeling can be cited. In order to improve the hitting feeling, it is desirable to control the vibration of the face portion. From such a viewpoint, in a golf club head in which the thickness of the face portion is reduced to improve the coefficient of restitution, a rib is often disposed on the rear surface side of the face portion (see specification of U.S. patent application publication No. 2017/028270).
Documents of the prior art
Patent document
Patent document 1: specification of U.S. patent application publication No. 2017/028270
Disclosure of Invention
Problems to be solved by the invention
Patent document 1 describes: a pair of parallel ribs are provided on the back surface side of the face portion. Patent document 1 describes: the pair of ribs is provided so as to extend in the vertical direction from the lower portion to the upper portion of the face portion at positions distant from the face portion.
However, the present inventors have made extensive studies and found that it is difficult to sufficiently improve the hitting feeling by the rib described in the above publication.
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an iron type golf club head capable of sufficiently improving a hitting feeling.
Means for solving the problems
In order to solve the above-described problems, an aspect of the present invention provides an iron type golf club head including a face portion and a sole portion extending rearward from a lower edge of the face portion, wherein a rib is connected to the sole portion and arranged on a rear surface of the face portion, the rib extends from the sole portion into an elongated circular region surrounded by a first circle having a radius of 10mm and centered on a centroid of the rear surface of the face portion or a projection point of a centroid of a front surface of the face portion onto the rear surface, a second circle having a radius of 10mm and centered on a projection point of a center of gravity of the golf club head onto the rear surface, and two line segments parallel to each other and circumscribed with the first circle and the second circle.
The iron-type golf club head may have a transverse moment of inertia of 4000g cm2The above.
The area of the front surface of the face portion may be 36.7cm2The above.
The upper end portion of the rib may be located in the oval region.
The upper end portion of the rib may be located on an imaginary straight line passing through the center of the first circle and the center of the second circle, or may be located above the imaginary straight line.
The minimum distance between the center of the first circle and the rib may be equal to or less than the minimum distance between the center of the second circle and the rib.
The rib may be inclined from the toe side to the heel side from the rod bottom toward the oblong region.
The rib may be connected to the rod bottom at a toe side position.
The height of the bead in the oval region is preferably 5mm or more.
The sole portion may have a groove extending in the toe-heel direction, and the rib may be connected to a bottom surface and a side surface of the groove.
In the present invention, "front" means the side of impact, and "rear" means the opposite side. The "front surface of the face portion" refers to a region on the toe side of the front surface of the golf club head with respect to the boundary line on the toe side of the heel portion (see the region inside the bold frame in fig. 5). The "back surface of the face portion" refers to a flat surface (see the region surrounded by the thick solid line and the thick broken line in fig. 6) facing the front surface of the face portion. The term "flat surface" refers to a shape including irregularities having a height or depth of 0.5mm or less. The "projection point projecting the center of gravity of the golf club head onto the rear surface" is a projection point projecting the center of gravity of the golf club head onto the rear surface of the face portion in the direction of the normal to the front surface of the face portion. The "moment of inertia in lateral direction" is the moment of inertia about a vertical axis passing through the center of gravity of the golf club head in a state where the iron type golf club head is set on a horizontal plane so as to have a predetermined loft angle and a predetermined lie angle. The phrase "the rib is coupled to the sole at a position on the toe side" means that the rib is coupled to the sole on the toe side with reference to the center of the rear surface of the face portion in the toe-heel direction. The "toe-heel direction" refers to a horizontal direction perpendicular to the front-rear direction in a state where the iron-type golf club head is set on a horizontal plane so as to have a preset loft angle and a preset lie angle.
Effects of the invention
In the iron type golf club head according to the aspect of the present invention, the rib is selectively provided on the back surface of the portion of the face portion that is likely to vibrate, so that the hitting feeling can be improved.
Drawings
Fig. 1 is a schematic front view (front view) showing an iron type golf club head according to an embodiment of the present invention.
Fig. 2 is a schematic rear view of the iron-type golf club head of fig. 1.
Fig. 3 is a partially enlarged view showing the arrangement of the rib of the iron type golf club head of fig. 2.
Fig. 4 is a sectional view taken along line IV-IV of the iron type golf club head of fig. 2.
Fig. 5 is a schematic view for explaining a front surface of a face portion of the iron type golf club head of fig. 1.
Fig. 6 is a schematic view for explaining a rear surface of a face portion of the iron type golf club head of fig. 1.
Fig. 7 is a schematic rear view showing an iron type golf club head according to an embodiment different from the iron type golf club head of fig. 1.
Description of the reference numerals
1 face part of the club
1a front surface
1b back side
2 pole bottom
2a groove
3 top of the container
4 toe part
5 heel part
6 rod neck
7 rear wall part
7a high rigidity portion
8. 18 reinforcing bar
9 ball bat
10. 20 iron type golf club head (Golf club head)
11 grooves
First circle of C1 and C11
Second circle of C2
L1, L2, L11, L12 line segment
Centroid of front surface of G1 face
Centroid of back of G11 face
G1' projecting the centroid of the front surface of the face portion to the projection point on the rear surface of the face portion
G2' projection of the center of gravity of the golf club head onto the rear surface of the face section
R1 and R11 oval regions
An imaginary straight line V passing through the center of the first circle and the center of the second circle
X iron type golf club
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the drawings as appropriate.
[ first embodiment ]
< iron type Golf club head >
The iron type golf club head 10 of fig. 1 to 4 (hereinafter also simply referred to as "golf club head 10") includes a face portion 1 and a sole portion 2 extending rearward from a lower edge of the face portion 1. The golf club head 10 includes a top portion 3 extending rearward from an upper edge of the face portion 1, a toe portion 4 extending rearward from a toe side (front end side) of the face portion 1, a heel portion 5 provided on a heel side (opposite to the front end side) of the face portion 1, and a hosel portion 6 provided continuously with the heel portion 5. The golf club head 10 includes a rear wall portion 7 extending from the rear end of the sole portion 2 and rising upward separately from the back surface 1b of the face portion 1. The golf club head 10 includes a rib 8 connected to the sole portion 2 and disposed on the rear surface 1b of the face portion 1. The golf club head 10 is used as an iron club (golf club) X in a state where a club (craft) 9 is connected to the hosel 6. The golf club head 10 mainly contains metal or alloy such as iron or stainless steel.
The golf club head 10 is preferably designed with a view to improving the directionality of the impact. In more detail, the golf club head 10 is designed to increase the moment of inertia in lateral direction by reducing the thickness of the face portion 1 (the distance between the front surface 1a and the back surface 1b of the face portion) while increasing the area of the front surface 1a of the face portion 1 (i.e., increasing the length in the toe-heel direction). In such a golf club head, the rigidity of the face portion is reduced by thinning the face portion, and the hitting feeling is deteriorated. In contrast, in the golf club head 10, the rib 8 is disposed on the rear surface 1b of the face portion 1 to improve the hitting feeling.
The lower limit of the moment of inertia of the golf club head 10 is preferably 4000g cm2More preferably 4100g cm2. In the golf club head 10, the directivity of the impact can be sufficiently improved by setting the moment of inertia in lateral rotation to the lower limit or more. In addition, even when the golf club head 10 has such a large moment of inertia, by controlling the arrangement of the rib 8 as described later, it is possible to achieve both an increase in the lateral moment of inertia and an improvement in the hitting feeling while suppressing an increase in the overall weight of the golf club head 10. In addition, the golf club head 10 can achieve both an increase in the moment of inertia and an improvement in the hitting feel, and the upper limit of the moment of inertia is not particularly limited. However, in the structure of the golf club, practically, the upper limit of the above-mentioned transverse moment of inertia can be 4600g cm, for example2。
(Bar face)
The face portion 1 has a front surface 1a (see the area within the thick frame in fig. 5) constituting the striking surface and a back surface 1b (see the area surrounded by the thick solid line and the thick broken line in fig. 6) on the opposite side of the front surface 1 a. A plurality of grooves 11 are provided on the front surface 1 a. The plurality of grooves 11 extend in the toe-heel direction at intervals in the vertical direction.
The lower limit of the area of the front surface 1a of the face portion 1 is preferably 36.7cm2More preferably 37.7cm2. In the golf club head 10, the area of the front surface 1a of the face portion 1 is set to the lower limit or more, so that the transverse moment of inertia can be sufficiently increased. On the other hand, the area of the front surface 1a of the face portion 1 is set to the aboveWhen the lower limit is not less than the lower limit, the face portion 1 is easily vibrated by thinning the face portion 1, and the hitting feeling is easily deteriorated. In contrast, in the golf club head 10, the arrangement of the rib 8 is controlled, so that the hitting feeling can be improved while suppressing an increase in the weight of the entire golf club head 10. In the golf club head 10, the upper limit of the area of the front surface 1a of the face portion 1 is not particularly limited, and the area of the front surface 1a of the face portion 1 can be increased to improve the hitting feeling. However, in terms of the structure of the golf club, the upper limit of the area may be, for example, 40.7cm2。
(Pole bottom)
The sole portion 2 extends rearward from the lower edge of the face portion 1, and is connected to the toe portion 4 at the toe-side end portion and the heel portion 5 at the heel-side end portion. The sole portion 2 is a thin plate having a longitudinal direction in the toe-heel direction and a width direction in the front-rear direction.
As shown in fig. 2 to 4, the sole portion 2 has a groove 2a extending in the toe-heel direction. The shaft bottom portion 2 enhances the flexibility of the shaft surface portion 1 by having a groove 2 a.
As shown in fig. 4, the groove 2a may be directly connected to the back surface 1b of the face portion 1. That is, the front side surface of the groove 2a may also serve as the back surface 1b of the face portion 1. According to this structure, the shaft bottom portion 2 is less likely to interfere with the deflection of the shaft surface portion 1.
(rear wall part)
The rear wall portion 7 contributes to increase the moment of inertia of the golf club head 10 by relatively increasing the weight at a position away from the center of gravity of the golf club head 10 in the horizontal direction. The front surface of the rear wall 7 also serves as a side surface on the rear side of the groove 2a provided in the lever bottom 2. The rear wall portion 7 has a high rigidity portion 7a having a rigidity greater than that of the other portion on the toe side in the toe-heel direction. The high rigidity portion 7a is, for example, an enlarged portion having an enlarged cross-sectional area perpendicular to the toe-heel direction. In the golf club head 10, the rear wall portion 7 has the high rigidity portion 7a, so that the moment of inertia in lateral rotation can be easily increased.
(reinforcing bar)
As shown in fig. 2 to 4, the rib 8 extends upward from the pole bottom 2. As shown in fig. 2 and 3, the rib 8 extends into an elongated circular region R1 surrounded by a first circle C1, a second circle C2, and two line segments L1 and L2, the first circle C1 has a radius of 10mm, the two line segments L1 and L2 are parallel to each other and circumscribed with the first circle C1 and the second circle C2, with a center of a projection point G1 'of a centroid G1 of the front surface 1a of the face portion 1 on the rear surface 1b, and a radius of 10mm of the second circle C2, and with a center of a projection point G2' of a centroid of the golf club head 10 on the rear surface 1b of the face portion 1. The first circle C1 is an imaginary circle drawn on the back surface 1b of the face portion 1 with the projected point G1' as the center. The second circle C2 is an imaginary circle drawn on the rear surface 1b of the face portion 1 with the projected point G2' as the center.
The golf club head 10 is intended to improve the feel of hitting a ball while suppressing an increase in the overall weight of the golf club head 10. Therefore, the rib 8 is preferably selectively provided at a position suitable for improving the hitting feeling. From this viewpoint, the reinforcing ribs 8 are selectively provided in the face portion 1 at a portion that is likely to vibrate. To describe in more detail, when the face 1 is bent around the bat 9 and the heel 5 continuing from the bat 9, the centroid G1 of the front surface 1a of the face 1 may be the portion of the face 1 that is most likely to vibrate. The contact range between the front surface 1a of the face portion 1 and the shot at the time of the instantaneous impact of the shot is generally a circle having a radius of about 10 mm. Therefore, the first circle C1 corresponds to the area most likely to vibrate at the time of the momentary impact of the shot. In addition, in the golf club head 10, the rigidity in the vicinity of the projected point G2' is likely to be small from the viewpoint of increasing the lateral moment of inertia. Therefore, the second circle C2 corresponds to a region where the face portion 1 is likely to vibrate. From these points of view, the oblong region R1 constituted by the first circle C1, the second circle C2, and the region sandwiched by the two circles C1 and C2 corresponds to the region of the golf club head 10 where the face portion 1 is likely to vibrate. Therefore, the rib 8 extends from the sole portion 2 into the oblong region R1, and therefore, the rib 8 can effectively suppress vibration of the face portion 1, and increase in the overall weight of the golf club head 10 can be suppressed, and the feel of hitting the ball can be improved. The golf club head 10 may further include other reinforcing ribs in addition to the reinforcing ribs 8. However, from the viewpoint of suppressing an increase in the weight of the entire golf club head 10, it is preferable that the golf club head 10 includes only one rib 8.
The rib 8 is directly connected to the back surface 1b of the face portion 1 without passing through other components. The rib 8 is plate-shaped with the toe-heel direction as the thickness direction. The thickness of the reinforcing ribs 8 can also be uniform. Preferably, the upper end of the rib 8 does not reach the top 3. That is, a gap is preferably formed between the upper end portion of the reinforcing bead 8 and the crown 3. In the golf club head 10, the vertical length of the rib 8 is shortened, so that the rib can be downsized, and the increase in the weight of the entire golf club head 10 can be suppressed.
The bead 8 may extend into the oblong region R1, and may extend above the oblong region R1 beyond the oblong region R1. That is, in the present invention, the bead "extending into the oblong region" refers to a structure including a position where the bead extends beyond the oblong region. However, the upper end portion of the bead 8 is preferably located in the oblong region R1. In the golf club head 10, the rib 8 fixed to the sole portion 2 extends into the oblong region R1, and thereby vibration of the oblong region R1 is suppressed and the hitting feeling can be improved. Therefore, by positioning the upper end portion of the rib 8 in the oblong region R1, the rib 8 can be made smaller within a range in which the effect of improving the hitting feeling can be obtained, and the increase in the weight of the entire golf club head 10 can be suppressed.
The upper end of the bead 8 may be located below an imaginary straight line V passing through the center of the first circle C1 and the center of the second circle C2. However, as shown in fig. 3, the upper end portion of the bead 8 is preferably located on an imaginary straight line V passing through the center of the first circle C1 and the center of the second circle C2, or located above the imaginary straight line V. With this configuration, the vibration of the face portion 1 at the time of the instantaneous impact of the hit ball can be relatively easily suppressed, and the hit feel can be easily improved.
When the upper end portion of the bead 8 is positioned on the virtual straight line V or above the virtual straight line V, the bead 8 preferably extends on a line segment connecting the center of the first circle C1 and the center of the second circle C2.
When the first circle C1 and the second circle C2 intersect with each other, the bead 8 preferably extends to a region included in both the first circle C1 and the second circle C2. With this configuration, the vibration of the face portion 1 at the time of the instantaneous impact of the hit ball can be relatively easily suppressed, and the hit feel can be easily improved.
The minimum distance between the center of the first circle C1 and the rib 8 is preferably equal to or less than the minimum distance between the center of the second circle C2 and the rib 8. By providing the rib 8 close to the first circle C1, which can be the most easily vibrated portion of the face portion 1, vibration of the face portion 1 at the time of a momentary impact of a ball hit can be more easily suppressed. When the minimum distance between the center of the first circle C1 and the bead 8 is equal to or less than the minimum distance between the center of the second circle C2 and the bead 8, the minimum distance between the center of the first circle C1 and the bead 8 may be 0. That is, the rib 8 may be arranged at the center of the first circle C1.
The rib 8 is preferably inclined from the toe side to the heel side from the sole portion 2 toward the oblong region R1. As described above, in this golf club head 10, the high rigidity portion 7a is provided on the toe side of the rear wall portion 7. Therefore, when the bead 8 is inclined from the toe side to the heel side from the rod bottom portion 2 toward the oblong region R1, the bead 8 is coupled to the high rigidity portion 7a or at least coupled to a position close to the high rigidity portion 7 a. According to this configuration, the rib 8 can be connected to the portion of the golf club head 10 that is less likely to vibrate (that is, the rib 8 can be extended from the portion of the golf club head 10 that is less likely to vibrate to the portion that is more likely to vibrate), and the feel of hitting the golf club head 10 can be easily improved.
The rib 8 extends linearly from the lower end to the upper end thereof. According to this structure, the length of the rib 8 is shortened to suppress an increase in weight of the golf club head 10, and the hitting feeling is easily and effectively improved.
The rib 8 is preferably connected to the sole 2 at a toe side position. Further, the bead 8 is more preferably connected to the high rigidity portion 7 a. According to this configuration, the rib 8 can be connected to a portion of the golf club head 10 that is less likely to vibrate, and the feel of hitting the golf club head 10 can be easily improved.
As shown in fig. 4, the rib 8 is coupled to the groove 2a of the rod bottom 2. Preferably, the rib 8 is connected to the bottom surface and the side surface of the groove 2 a. In other words, the lower end portion of the reinforcing rib 8 is preferably fitted into the groove 2 a. In fig. 4, the rib 8 is connected to the front side surface of the groove 2a (i.e., the back surface 1b of the face portion 1), the bottom surface of the groove 2a (i.e., the upper surface of the sole portion 2), and the rear side surface of the groove 2a (i.e., the front surface of the rear wall portion 7). In the golf club head 10, the rib 8 is connected to the bottom surface and the side surface of the groove 2a, so that the vibration of the rib 8 is easily suppressed. As a result, the hitting feel can be easily and reliably improved.
The height (length in the vertical direction with respect to the back surface 1b of the face portion 1) of the bead 8 in the oblong region R1 is preferably 5mm or more. That is, the minimum height of the bead 8 in the oblong region R1 is preferably 5 mm. If the height does not satisfy the lower limit, the rib 8 is likely to vibrate at the moment of impact of the impact, and the feel of impact of the golf club head 10 may not be sufficiently improved. The upper limit of the height of the bead 8 in the oblong region R1 is not particularly limited, but is preferably 10mm, and more preferably 7mm, from the viewpoint of suppressing an increase in the weight of the bead 8.
The maximum height (maximum length in the vertical direction with respect to the back surface 1b of the face portion 1) of the bead 8 in the region connected to the groove 2a is preferably 8mm or more. If the maximum height does not satisfy the lower limit, the rib 8 is likely to vibrate at the moment of impact of the impact, and the feel of impact of the golf club head 10 may not be sufficiently improved. The upper limit of the maximum height of the bead 8 in the region connected to the groove 2a is not particularly limited, but is preferably 12mm, and more preferably 10mm, from the viewpoint of suppressing an increase in the weight of the bead 8.
As shown in fig. 4, the height of the rib 8 may be increased from the upper end thereof toward the side connected to the groove 2a (the side having the largest height). According to this configuration, it is possible to suppress the occurrence of vibration of the rib 8 at the time of a momentary impact of a hit ball, and to reduce the weight of the rib 8 to suppress an increase in the weight of the golf club head 10.
< advantages >
In the golf club head 10, the rib 8 is selectively provided on the back surface 1b of the portion of the face portion 1 that is likely to vibrate, so that the hitting feeling can be improved.
[ second embodiment ]
< Golf club head >
The golf club head 20 of fig. 7 includes a face portion 1 and a sole portion 2 extending rearward from a lower edge of the face portion 1. The golf club head 20 includes a rib 18 connected to the sole portion 2 and disposed on the rear surface 1b of the face portion 1.
The golf club head 20 may have the same structure as the golf club head 10 of fig. 1, except that the arrangement of the ribs 18 is different. Therefore, only the arrangement of the ribs 18 will be described below.
(reinforcing bar)
The rib 18 extends to an elongated circular region R11 surrounded by a first circle C11, a second circle C2, and two line segments L11 and L12, the first circle C11 has a radius of 10mm and is centered on a centroid G11 of the rear surface 1b of the face portion 1, the second circle C2 has a radius of 10mm and is centered on a projection point G2' of the center of gravity of the golf club head 20 onto the rear surface 1b of the face portion 1, and the two line segments L11 and L12 are parallel to each other and are circumscribed with the first circle C11 and the second circle C2. The first circle C11 is an imaginary circle drawn on the back surface 1b of the face portion 1 with the centroid G11 as the center, and the second circle C2 is an imaginary circle drawn on the back surface 1b of the face portion 1 with the projected point G2' as the center. That is, the first circle C11 of the golf club head 20 is centered on the centroid G11 of the rear surface 1b of the face portion 1, with respect to the first circle C1 of the golf club head 10 of fig. 1 centered on the projection point G1' that projects the centroid G1 of the front surface 1a of the face portion 1 onto the rear surface 1 b.
In the golf club head 20, the rib 18 is selectively provided in a portion of the face portion 1 which is likely to vibrate. To explain in more detail, in the golf club head 20, a sole portion 2, a crown portion 3, a toe portion 4, and a heel portion 5 are provided in a frame shape on the peripheral edge of the back surface 1b of the face portion 1. In other words, the peripheral edge portion of the rear surface side of the face portion 1 is fixed by the sole portion 2, the crown portion 3, the toe portion 4, and the heel portion 5. Therefore, the centroid G11 of the back surface 1b of the face portion 1 can be the portion of the face portion 1 that vibrates most easily. Therefore, the oblong region R11 constituted by the first circle C11, the second circle C2, and the region sandwiched by the two circles C11 and C2 corresponds to the region of the golf club head 20 where the face portion 1 is likely to vibrate. Therefore, the rib 18 extends from the sole portion 2 into the oblong region R11, and therefore, the rib 18 can effectively suppress vibration of the sole portion 1, and increase in the overall weight of the golf club head 20 can be suppressed, and the feel of hitting the ball can be improved.
The specific configuration of the rib 18 may be the same as the rib 8 of fig. 1, except that the center of the first circle C11 is different from the golf club head 10 of fig. 1. For example, the position of the upper end portion of the bead 18 with respect to the oblong region R11, the inclination direction of the bead 18, the coupling position of the bead 18 and the stem bottom portion 2, the height of the bead 18, and the like may be the same as those of the bead 8 in fig. 1.
< advantages >
In the golf club head 20, as in the golf club head 10 of fig. 1, the rib 18 is selectively provided on the back surface 1b of the portion of the face portion 1 that is likely to vibrate, so that the hitting feeling can be improved.
[ other embodiments ]
The above embodiments do not limit the structure of the present invention. Therefore, it should be understood that the above-described embodiments may be omitted, replaced, or added with components of each part of the above-described embodiments based on the description of the present specification and the common technical knowledge, and all of them fall within the scope of the present invention.
For example, if the bead extends to the oval region, the minimum distance between the center of the first circle and the bead may be larger than the minimum distance between the center of the second circle and the bead.
The position of the rib connected to the sole portion may be set based on the specific structure of the golf club head. For example, the rib may be connected to the pole bottom at a heel-side position. The rib may be configured not to be inclined from the toe side to the heel side from the sole portion toward the oblong region.
The specific structure of the stem bottom portion is not limited to the structure described in the above embodiment. For example, the sole portion may not have a groove extending in the toe-heel direction. In addition, even when the bottom portion of the stem has a groove, the groove may be formed at a position away from the back surface of the stem surface portion, for example.
A reinforcing member, a cushioning member, or the like other than the rib may be provided on the rear surface of the face portion. However, from the viewpoint of remarkably exerting the effect of improving the hitting feeling, it is preferable that no reinforcing member other than the rib is disposed on the rear surface of the face portion. Preferably, a cushioning member other than the rib is not disposed on the rear surface of the face portion.
Industrial applicability
As described above, the iron type golf club head according to the first aspect of the present invention is suitable for improving the hitting feeling.

Claims (10)

1. An iron type golf club head comprising a face portion and a sole portion extending rearward from a lower edge of the face portion,
a reinforcing rib connected to the rod bottom and disposed on the back surface of the rod surface portion,
the reinforcing rib extends from the bottom of the golf club to a long circular area surrounded by a first circle, a second circle and two line segments, the radius of the first circle is 10mm, the center of the first circle is the center of the centroid of the back surface of the face portion or the projection point of the centroid of the front surface of the face portion on the back surface, the radius of the second circle is 10mm, the center of the second circle is the projection point of the center of gravity of the golf club head on the back surface, and the two line segments are parallel to each other and are circumscribed with the first circle and the second circle.
2. The iron-type golf club head of claim 1,
the transverse moment of inertia is 4000g cm2The above.
3. The iron type golf club head of claim 1 or 2, wherein,
the area of the front surface of the club face part is 36.7cm2The above.
4. The iron-type golf club head of claim 1, 2, or 3, wherein,
the upper end part of the reinforcing rib is positioned in the long circular area.
5. The iron-type golf club head of claim 4,
the upper end portion of the rib is located on an imaginary straight line passing through the center of the first circle and the center of the second circle, or above the imaginary straight line.
6. The iron-type golf club head according to any one of claims 1 to 5, wherein,
the minimum distance between the center of the first circle and the reinforcing rib is equal to or less than the minimum distance between the center of the second circle and the reinforcing rib.
7. The iron-type golf club head according to any one of claims 1 to 6, wherein,
the rib is inclined from the toe side to the heel side from the sole toward the oblong region.
8. The iron-type golf club head according to any one of claims 1 to 7, wherein,
the rib is connected to the sole at a toe side position.
9. The iron-type golf club head according to any one of claims 1 to 8, wherein,
the height of the reinforcing ribs in the oblong area is 5mm or more.
10. The iron-type golf club head according to any one of claims 1 to 9, wherein,
the rod bottom portion has a groove extending in the toe-heel direction,
the reinforcing ribs are connected to the bottom and side surfaces of the groove.
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CN216676899U (en) * 2020-10-15 2022-06-07 雅马哈株式会社 Iron type golf club head

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JP3594515B2 (en) * 1999-07-16 2004-12-02 ブリヂストンスポーツ株式会社 Iron golf club head
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US9993704B2 (en) * 2016-07-26 2018-06-12 Acushnet Company Striking face deflection structures in a golf club
JP3224026U (en) * 2019-08-16 2019-11-21 復盛應用科技股▲分▼有限公司 Golf club head with unequal thickness plate

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CN102794003A (en) * 2011-05-23 2012-11-28 普利司通运动株式会社 Golf club head
CN216676899U (en) * 2020-10-15 2022-06-07 雅马哈株式会社 Iron type golf club head

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