JP2016135239A - Golf club head, and golf club including the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wood form golf club allowing a player who hardly catches a ball and easily strikes to a right side to easily strike a caught ball without hindering the acquisition of correct swing, and continuously usable at least to a middle level.SOLUTION: In a wood form golf club head 2A which has an insertion hole to insert a connection sleeve 31 at a tip side into and connect a shaft 3, and to which the shaft 3 is detachably attached, as for the insertion hole, in addition to a first insertion hole 25a opened at a crown 21 or the vicinity of a heel of a head upper surface, a second insertion hole 25b is opened in a position separated by a prescribed distance from the first insertion hole 25a to a toe direction, and a distance from a shaft center axis line to a head center of gravity point becomes shorter in a state that the shaft 3 is attached to the second insertion hole 25b than a state that the shaft 3 is attached to the first insertion hole 25a.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a golf club head and a golf club having the golf club head, and more particularly to a golf club head that allows a captured ball to be easily hit even by a player who does not catch the ball in a normal club and can easily fly to the right. The present invention relates to a golf club having

  In recent years, a decrease in the number of customers and sales in the golf industry has become a problem in Japan, such as attracting customers at golf courses and driving ranges, and manufacturing and selling golf equipment. This is mainly due to a decline in the golf population, but the decline in the golf population is even more pronounced in the years after the baby boom generation, which occupies a central position among current golf players, is expected to quit golf. It is said to become.

  As a cause of such a decrease in the population of golf, it has been pointed out that there are fewer people who start golf newly, and there are many cases where golf quits in a short period of time even if golf is started once. The main reason for this is that the sport, golf, has a higher starting threshold because it costs more and more time and effort than other sports. That is, it is necessary to purchase a relatively expensive golf club set and to practice a considerable amount of practice in advance at a golf driving range, etc., from the start of golf to the course debut.

  Also, golf clubs used for golf, unlike baseball bats, have hit points at a position away from the central axis of the shaft, so it is difficult for beginners to match the hit points with the ball and the face does not return and jumps to the right. It has a structural feature that it is easy. In particular, drivers of recent years have become more difficult to catch for beginners as a result of pursuing flight distance performance and increasing the length and the size of the head. For this reason, it is normal to make mistakes frequently after the putter on the course, and it is difficult to get a fun experience every time, which leads to quitting golf. .

  To solve this problem, there are many clubs for beginners and beginners who can catch balls easily by using a hook face or a lie angle upright only for wood-type clubs such as drivers that are particularly difficult to catch due to the long shaft. Is provided. However, in this case, the ball will not fly straight unless the ball is caught, so that it is easy to fall into a vicious circle in which it is not possible to acquire the correct way. For this reason, when a ball is caught to some extent, it becomes necessary to replace the club to be used, and the cost burden for that becomes large.

  On the other hand, as described in Japanese Patent Application Laid-Open No. 2009-268835, a wood-type club has also been proposed in which the center of gravity distance (the distance from the center axis of the shaft to the center of gravity of the head) is shortened so that the head can be easily returned. Yes. This means that the center of gravity distance is shortened by devising the weight arrangement position, etc., but the amount that can be adjusted with the weight is limited, and if the center of gravity distance is shortened by the weight arrangement, the dot on the face The position (sweet spot) becomes extremely close to the heel, resulting in a golf club with a narrow sweet area.

JP 2009-268835 A

  The present invention is intended to solve the above-described problems. For a wood-type golf club, a player who is hard to catch a ball and easily jumps to the right can easily catch a captured ball without hindering acquisition of a correct swing. It is an object of the present invention to be able to be used and continuously usable until at least an intermediate level.

  Accordingly, the present invention provides a wood-type golf club head having an insertion hole for connecting the shaft by inserting a connecting sleeve on the tip end side of the shaft, wherein the shaft can be detachably attached. In addition to the first insertion hole opened near the heel on the crown or head upper surface side, the insertion hole has a second distance at a position away from the first insertion hole by a predetermined distance in the toe direction (tip direction). When the insertion hole is open and the shaft is attached to the second insertion hole, the center axis of the shaft is closer to the center of gravity of the head than when the shaft is attached to the first insertion hole. The distance (the center of gravity distance) is shortened.

  As described above, in the golf club head in which the shaft can be detachably mounted, the center of gravity distance is located at a position closer to the toe than the first insertion hole at the heel position substantially similar to the normal golf club head. By providing a second insertion hole that shortens the head, the head can be easily returned simply by replacing the shaft into the second insertion hole. It is easy to catch the ball without interfering with the acquisition of the correct swing, and after wearing a swing that catches the ball to some extent, just replace the shaft in the first insertion hole and install the center of gravity distance Since it is close to a normal golf club head or in a similar state, it is easy to use continuously until it reaches an intermediate level.

  In this case, the second insertion hole extends from the position where the surface including the center axis and the intended play line is more than 0.625 inches away from the base end surface of the heel portion to the center of gravity of the head. If the distance is zero, the first insertion hole is formed at a position that conforms to 1d (2) of the Golf Rule 2. It is possible to selectively use in two modes: a state of being attached to the second insertion hole and a state of being attached to the second insertion hole that does not conform to the golf rules.

  Furthermore, in the above-described golf club head, the second insertion hole is a state in which the connecting sleeve is inserted deeply until the shaft tip is closer to the sole surface than the state where the shaft is mounted in the first insertion hole. If it is to be mounted at the same time, it is possible to reduce the overall balance of the club while shortening the overall length of the club by replacing the shaft from the first insertion hole to the second insertion hole. It will be easy to catch.

  Furthermore, in the above-described golf club head, the second insertion hole has an upper end provided at an angle inclined in the face direction with respect to the first insertion hole. When the angle is set to be the same, when the shaft is attached to the second insertion hole, the face is directed upward by 1 degree or more than when the shaft is attached to the first insertion hole. If it is characterized, the loft-up effect can be obtained and the sphere can be easily lifted by simply replacing the first insertion hole with the second insertion hole. It becomes.

  In addition, the golf club head described above is characterized in that the second insertion hole is formed at a position a predetermined distance deeper than the first insertion hole with reference to the face surface. In this case, the center axis of the shaft can be easily brought closer to the center of gravity of the head, so that a golf club head with higher operability can be easily realized.

  And if it is set as the golf club which mounts the shaft which equipped the said sleeve on the front end side to each golf club head mentioned above, the function of the golf club head mentioned above can be exhibited immediately only by using this. Become.

  According to the present invention, in addition to the first insertion hole, a second insertion hole is provided that is closer to the toe and shortens the center-of-gravity distance. The captured ball can be easily hit without disturbing the acquisition of the correct swing, and can be used continuously until at least the intermediate level.

(A) is a top view of the golf club head which is embodiment in this invention, (B) is sectional drawing which follows the XX line of (A). (A) is sectional drawing of the state which attached the shaft to the 1st insertion hole of the golf club head of FIG. 1 (B), (B) replaces a shaft from the state of (A) to the 2nd insertion hole. FIG. 1A is a cross-sectional view of a golf club head as an application example of the golf club head of FIG. 1B, and FIG. 1B is a state where a shaft is attached to the second insertion hole of the golf club head of FIG. It is sectional drawing. (A) is a plan view of a golf club head as a modified example of the golf club head of FIG. 1 (A), and (B) is a plan view of a golf club head as an application example of (A). 4A is a cross-sectional view taken along a plane including a central axis of a second insertion hole of a golf club head as a modification of the golf club head of FIG. 4 and an intended play line, and FIG. It is sectional drawing of the state which hold | maintained the golf club which attached the shaft to the 2nd insertion hole of a club head. (A) is a longitudinal sectional view in an exploded state showing an example of a method for producing a golf club head according to the present invention, and (B) is a longitudinal sectional view after assembly of (A). (A) is a top view which shows the application example which applied the characteristic part of this invention to the golf club head without a crown, (B) is a front view which shows the state which looked at the golf club head of (A) from the heel side. is there. It is a longitudinal cross-sectional view which shows the modification which shortened the gravity center distance by the 1st insertion hole.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the present invention, the center-of-gravity distance of the golf club head refers to the shortest distance from the head center-of-gravity point in the golf club head to the shaft center axis.

  FIG. 1A is a plan view of a golf club head 2A according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view taken along line XX of FIG. The golf club head 2A of the present embodiment has an insertion hole for inserting a connection sleeve provided on the tip end side of the shaft and connecting it to the shaft, and a driver capable of detachably mounting the shaft It is used as an industrial head.

  The insertion hole is formed in a first insertion hole 25a opened at a normal position on the heel side end side of the crown 21 (a position of the insertion hole in a general wood club and a position that conforms to the golf rules). In addition, a second insertion hole 25b is opened at a position away from the first insertion hole 25a by a predetermined distance in the toe direction (tip direction) on the crown 21, and the second insertion hole 25b. By setting the shaft to the state where the shaft is attached, the center of gravity distance is remarkably shortened compared to the case where the shaft is attached to the first insertion hole 25a, and this is the greatest feature of the present invention. ing.

  That is, as shown in FIG. 1 (A), the golf club head 2A is separated from the first insertion hole 25a opened at the position near the face on the base end side of the crown 21 by a predetermined distance from the first insertion hole 25a. As shown in the longitudinal sectional view of FIG. 1 (B), two of the second insertion holes 25b opened at the above positions are provided in parallel. And it is the shortest distance from the center axis line of insertion hole 25a, 25b each shown with a dashed-dotted line (coincidence with the center axis line of a shaft) to the head center-of-gravity point G shown in the hollow part inside the main body 20 of this golf club head 2A. The center-of-gravity distances ga and gb are different from each other. In the present embodiment, gb is about one third of the length of ga.

  And the state where the shaft 3 provided with the sleeve 30 at the tip is inserted and attached to the first insertion hole 25a shown in FIG. 2 (A), and the second insertion hole 25b shown in FIG. 2 (B). On the other hand, the length of the center-of-gravity distance can be easily changed by performing the switching operation between the state in which the shaft 3 is inserted and mounted to shorten the center-of-gravity distance.

  That is, as shown in FIG. 2A, the insertion portion 31 of the sleeve 30 provided on the distal end side of the shaft 3 is inserted into the first insertion hole 25a until the bottom surface of the hosel portion 32 comes into contact with the opening portion. From the state of the golf club 1A in which the screw 33 is screwed and fixed through the screw insertion recess 26a that is inserted and opened on the sole side, as shown in FIG. The golf club 1A 'is inserted into the insertion hole 25b, and the screw 33 is screwed and fixed through the screw insertion recess 26b in the same manner as described above, so that the center of gravity distance can be easily changed from the long state to the short state. It is possible to do this, and the reverse operation is also easy.

  Therefore, a player such as a golf beginner who has only one golf club 1A equipped with the golf club head 2A and does not easily catch the ball and easily goes to the right, until FIG. B) It is assumed that the golf club 1A 'is used in a state where it is easy to catch the ball. After that, when the ball reaches a certain level and can be caught, it is simply switched to the state of the golf club 1A shown in FIG. Can be used continuously.

  According to 1d (2) of Golf Rule 2, the heel portion of the golf club is within 0.625 inch (about 15.88 mm) from the plane including the straight axis of the shaft and the intended play line (horizontal direction). The position of the second insertion hole 25b is 0.625 inches in terms of the distance between the central axis and the plane of the intended play from the base end surface of the heel portion. It is preferable to form in a range from a position exceeding the center of gravity to a position where it intersects with the head center-of-gravity point G (zero center-of-gravity distance) from the viewpoint of significantly reducing the center-of-gravity distance and improving operability.

  Therefore, when used in the state of FIG. 2B, there are cases where the golf rule is violated, but when the golf rule is mounted in the first insertion hole 25a of FIG. 2 can be made to satisfy the above-mentioned golf rules. Therefore, after the ball is caught to some extent, the state shown in FIG. Then you should not use it. In addition, since the golf club head according to the present invention does not assume the use of intermediate or higher players who participate in competitions that require compliance with the golf rules, it is considered that there is almost no problem with golf rule conflicts in the first place. .

  In the golf club head and golf club of the present application, when the center of gravity distance is shortened, the distance from the center axis of the shaft to the hitting point position is shortened. It is assumed that it will fall slightly compared to the flight distance. However, at the level of beginners and beginners who cannot accurately capture the ball, it is possible to expect an effect that the average flight distance is greatly increased only by capturing the ball and flying it in the target direction.

  FIG. 3A shows a golf club head 2B as an application example of the above-described golf club head 2A. In this golf club head 2B, the sleeve 30 is deeply (held) so that the second insertion hole 25c is closer to the sole surface than the state where the shaft is mounted in the first insertion hole 25a. It is characterized by the fact that it is mounted in a state of being inserted).

  That is, as shown in FIG. 3 (B), the sleeve 30 on the tip end side of the shaft 3 has a large diameter hosel portion 32 formed on the upper side of the insertion portion 31, and the second difference in which the insertion portion 31 is inserted. The insertion hole 25c is formed to a deeper position, and a large-diameter insertion hole 27 for inserting the bozel portion 32 is formed on the upper side thereof. By replacing the shaft 3 in the insertion hole 25c and mounting it at a deep position, the overall length of the golf club is shortened, the balance is lightened and the meet rate is increased, so that the golf club 1B ′ is easier to swing and catch the ball. Become.

  FIG. 4A shows a golf club head 2C as a modification of the above-described golf club head 2A. This example is characterized in that the second insertion hole 25d is formed at a position deeper than the first insertion hole 25a by a predetermined distance as seen from the face surface. Can be made closer to the center of gravity G of the head, and the operability is further improved.

  FIG. 4B shows a golf club head 2D as a modified example of the above-described golf club head 2C. In this example, the second insertion hole 25e is deep as in the above-described golf club head 2B. It is characterized in that a large-diameter insertion hole 28 for inserting the hosel part 32 is formed on the upper side of the position. In this case, the operability can be further improved by shortening the shaft with deep insertion of the shaft.

  In addition, in order to avoid a situation that violates the provisions of 4a (1) of Golf Rule 2 (the hole that penetrates the head is violated), the screw hole that does not allow the shaft to be inserted cannot be easily removed. The lid member may be closed, or may be closed with a screw provided with a retaining rubber ring inserted. In this case, if the lid member is made of a metal having a high specific gravity and is installed in the screw insertion recess on the sole side, it is easy to balance the weight of the sleeve on the shaft tip side inserted into the other insertion hole. It will be a thing.

  In addition, as shown in FIG. 5B, in the state where the club is held so that the angles of the shafts with respect to the ground are the same, the state where the club is mounted in the second insertion hole 25f is the first insertion hole. Golf having a configuration in which the second insertion hole 25f is provided with the upper end side inclined in the face direction as compared with the first insertion hole 25a so that the face is directed upward by one degree or more than the state attached to 25a. It is good also as club head 2E. This is applicable in common to all the embodiments and examples described above, but the golf club 1E ′ in a state where the first insertion hole 25a is replaced with the second insertion hole 25f and is mounted. As a result, a loft-up effect is obtained, the sphere is likely to rise, and the sphere is more easily captured.

  FIG. 6A is an illustration for explaining an example of a manufacturing method common to the golf club heads of the respective embodiments described above. The golf club head is composed of a sole-side body portion 20b, a crown portion 21b, and not shown. The first insertion hole 25g and the second insertion hole 25h (see FIG. B) are prepared with a predetermined length from the inner surface of the sole side body portion 20b and the inner surface of the crown portion 21b. It is characterized in that it is partly constituted by a cylindrical structure protruding so as to have no intermediate part.

  Then, as shown in FIG. 6 (B), the upper and lower holes are connected via the tubular connecting members 40 and 41 to form the first insertion hole 25g and the second insertion hole 25h. It is said. In addition to this, the insertion portion 31B of the sleeve 30B is formed into a prismatic outer surface shape such as a hexagonal column so that the shaft 3B does not rotate in the mounted state, and the first insertion hole 25g and The whole or a part of the inner surface shape of the portion into which the distal end side and the proximal end side of the insertion portion 31B are inserted in the second insertion hole 25h has the same shape as this.

  By adopting such a part configuration method, two insertion holes can be easily provided in the hollow golf club head, and the mounted shaft can be fixed in the rotational direction. . Further, if the cylindrical connecting members 40, 41 are made of a material such as a synthetic resin having a light specific gravity and a predetermined elasticity, the center of gravity of the head is fixed by fitting the upper and lower ends thereof. It is easy to prevent the situation where water and dust enter the hollow portion of the head through the insertion hole while making it difficult to prevent the point position from being set.

  FIG. 7A is a plan view for explaining an application example in which the above-described characteristic portions of the present invention are applied to a golf club head having only a face portion and a sole-side body portion 20c without a crown portion. It is. In the application example shown in the figure, a golf club in which the tubular member constituting the first insertion hole 25j and the second insertion hole 25k is provided so as to protrude upward from the sole side in the sole side body portion 20c because there is no crown portion. The club head 2H is shown.

  In this example, since the crown does not exist in the main body 20C, the upper end surface of the tubular member constituting the first insertion hole 25j becomes the head upper surface side (corresponding to the upper surface of the crown), and the first insertion hole In order to ensure the strength of the tubular member constituting 25j and the second insertion hole 25k, a reinforcing rib is provided. Further, as can be inferred from FIG. 8B, a low center of gravity of the head has been achieved because there is no crown portion, and even a beginner has a feature that the ball is likely to rise. In addition, because it has no crown part, it is relatively easy to manufacture and light in weight. Therefore, it is cheap and easy to process without using expensive and difficult-to-process titanium alloys. It is also possible to create using a material.

  In the above description, the case where the first insertion hole is positioned to comply with the above-described golf rules has been described. However, as shown in FIG. 8, the first insertion hole 25i is connected to the central axis of the shaft. And the distance c between the heel surfaces may exceed 0.625 inches. By doing in this way, the center-of-gravity distance in the state which attached the shaft to the 1st insertion hole 25i can be shortened rather than a normal club, and it becomes possible to make it the state which is easy to catch a ball.

  That is, although the center of gravity distance of a driver in recent years is said to be around 39 mm, for example, the center of gravity distance by the first insertion hole 25i is set to about 30 mm, and the center of gravity distance by the second insertion hole 25h is set to about 15 mm. For example, a beginner uses a screwdriver at the position of the second insertion hole 25h during the beginner's stage, and at the stage where he / she has improved to some extent and has become a beginner (more than a level that cuts about 120 on average score), the first insertion hole 25i It should be used at the position.

  As a result, it is possible to continue practicing without interfering with the acquisition of the correct swing, and when switching to a normal (center of gravity distance) driver at the stage of becoming an intermediate person (more than the level that cuts about 100 in average score) Because it can be used while taking steps according to your progress, it is easy to achieve smooth progress from beginner to intermediate.

  In addition, in the above description, the case where the characteristic portion of the present application is applied to the driver has been described. However, the present invention is not limited to this, and by applying the fairway wood, the utility club, and the method of FIG. It can also be applied to iron clubs.

  As described above, according to the present invention, for a wood-type golf club, a player who is hard to catch a ball and easily jumps to the right can easily hit the captured ball without hindering acquisition of a correct swing. It became easy to use continuously even after getting a swing to catch.

  1A, 1B, 1E 'Golf club, 2A, 2B, 2C, 2D, 2E, 2F, 2G, 2H Golf club head, 3, 3B shaft, 20, 20C body, 21 crown, 25a, 25g, 25i, 25j 1st 25b, 25c, 25d, 25e, 25f, 25h, 25k Second insertion hole, 26a, 26b Screw insertion recess, 30, 30B Sleeve, 31 insertion part, 32 hosel part, 33 screw

Claims (6)

  In a wood-type golf club head having an insertion hole for connecting the shaft by inserting a connection sleeve provided on the tip end side of the shaft and capable of detachably mounting the shaft, the insertion hole is In addition to the first insertion hole opened near the heel position on the crown or head upper surface side, a second insertion hole is opened at a position away from the first insertion hole by a predetermined distance in the toe direction. In addition, by setting the shaft in the second insertion hole, the distance from the center axis of the shaft to the center of gravity of the head is larger than the state in which the shaft is installed in the first insertion hole. A golf club head characterized by being shortened.   In the second insertion hole, the distance from the position where the surface including the center axis and the intended play line is more than 0.625 inches away from the base end surface of the heel portion to the center of gravity of the head becomes zero. The golf club head according to claim 1, wherein the golf club head is formed in a range up to a position.   The second insertion hole is mounted in a state where the connecting sleeve is inserted deeply to a position where the shaft tip is closer to the sole surface than in the state where the shaft is mounted in the first insertion hole. The golf club head according to claim 1, wherein the golf club head is a golf club head.   The upper end of the second insertion hole is provided at an angle inclined in the face direction relative to the first insertion hole, and the shaft is mounted so that the shaft angle with respect to the ground is the same. 2. The face of the second insertion hole when the shaft is attached to the first insertion hole is at least once higher than the state where the shaft is attached to the first insertion hole. , 2 or 3 Golf club head.   The second insertion hole is formed at a position deeper than the first insertion hole by a predetermined distance on the basis of the face surface. Golf club head.   6. A golf club comprising: the golf club head according to claim 1, 2, 3, 4, or 5; and the shaft having the sleeve provided on a distal end side.

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