JP6313634B2 - Golf club - Google Patents

Description

  The present invention relates to a golf club capable of adjusting the size of a loft angle of a head body according to user's preference.

  The applicant of the present application has previously proposed a golf club described in Patent Document 1 described below, and this golf club appropriately sets the lie angle, loft angle, and face angle of the head body according to the user's preference. It is possible to adjust. However, in this prior art, since the head main body swings three-dimensionally with respect to the shaft during adjustment, the lie angle and the face angle are simultaneously changed when the loft angle is adjusted. Therefore, when the user wants to adjust only the loft angle, it is preferable that the adjustment function is specialized only for the loft angle.

Japanese Patent No. 4671447

  SUMMARY OF THE INVENTION In view of the above, the present invention provides a golf club having a structure specializing in adjusting the loft angle only, and maintaining the head body in a stable state even after adjusting the loft angle. An object is to provide a golf club that can be used.

  In order to achieve the above object, a golf club according to claim 1 of the present invention is fixed to an end portion of a shaft, a hosel portion provided with a shaft insertion hole having a through-hole shape that is provided integrally or separately with a head body. And an angle adjusting unit provided with a bottomed cylindrical shaft sleeve to be inserted into the shaft insertion hole, and a retaining engagement portion which is inserted into the shaft insertion hole from the lower end opening and does not come out upward. The angle adjusting unit and the shaft sleeve can be attached to and detached from the hosel portion by being inserted through a screw insertion hole provided in the angle adjusting unit and screwed into a female screw portion provided on an end surface portion of the shaft sleeve. A fixing screw for fixing, an upper end opening peripheral portion of the shaft insertion hole, and the corresponding peripheral portion A spherical bearing structure is provided on the outer peripheral portion of the shaft sleeve, a rotation preventing structure is provided between the hosel portion and the shaft sleeve, and the outer peripheral surface of the lower end portion of the shaft sleeve inserted into the shaft insertion hole and the corresponding A radial gap is set between the shaft insertion hole and the inner peripheral surface of the shaft insertion hole, and a part of the circumferential spacer provided in the angle adjusting unit is inserted into the radial gap so that the head body is attached to the shaft. A golf club swingable with respect to a sleeve, wherein the shaft insertion hole and the shaft sleeve inserted into the shaft insertion hole have an inner diameter surface sectional shape of the shaft insertion hole and an outer diameter of the shaft sleeve. A combination of an ellipse and a perfect circle whose cross-sectional shape is a plane, or a combination of ellipses with different major axes Thus, the swinging direction of the head main body with respect to the shaft sleeve is defined in a direction orthogonal to the striking surface provided on the head main body, and only the loft angle of the head main body can be adjusted. Features.

  A golf club according to a second aspect of the present invention is the golf club according to the first aspect, wherein the end surface of the shaft sleeve is elliptical or eccentric with respect to the central axis of the shaft sleeve. In addition, a tapered taper surface is provided downward on the outer peripheral surface of the lower end portion of the shaft sleeve, so that a circumferential gap is formed between the outer peripheral surface of the lower end portion of the shaft sleeve and the inner peripheral surface of the shaft insertion hole. The spacer is provided with a shape in which the gap width gradually decreases from the wide part of the upper part to both in the circumferential direction, and the spacer part provided in the angle adjusting unit has a thick part at the center in the circumferential direction. Located in the wide part in the initial state of angle adjustment, and when the angle adjusting unit is rotated in one circumferential direction from the initial state, the spacer part is the same direction The head body swings in the direction of increasing the loft angle by entering into a gradually narrowing shape in the radial gap and relatively pressing the lower end of the shaft sleeve, When the angle adjusting unit is rotated 90 degrees to about 90 degrees in the same direction, the thick wall portion turns to the ball striking face side of the lower end portion of the shaft sleeve, and at this time, the loft angle becomes maximum and the shaft sleeve is relatively When the end of the swingable range is reached, the angle adjusting unit does not rotate any more, and when the angle adjusting unit is rotated in the other circumferential direction from the initial state, the spacer portion rotates in the same direction, When the thick wall portion enters a gradually narrowing shape in the radial gap and presses the lower end portion of the shaft sleeve relatively, the head main body is When the angle adjusting unit is rotated 90 degrees or substantially 90 degrees in the same direction, the thick wall portion turns to the anti-striking surface side of the lower end portion of the shaft sleeve. When the loft angle is minimized and the shaft sleeve reaches the other end limit of the relative swingable range, the angle adjusting unit does not rotate any more, and the angle adjusting unit has a rotatable range of 180 degrees due to the above structure. Or, it is defined to be approximately 180 degrees.

  The golf club according to claim 3 of the present invention is the golf club according to claim 1 or 2, wherein the screw insertion hole provided in the angle adjusting unit extends in a direction away from the spacer portion. By adopting the shape, the fixing screw can be fixed in an eccentric state with respect to the angle adjusting unit, whereby the adjustable angle of the loft angle is expanded.

  Furthermore, the golf club according to claim 4 of the present invention is the golf club according to claim 1, 2, or 3, wherein a concave unit housing space is provided at a heel side portion of the sole portion of the head body. A head seat adjustment unit is assembled in the unit housing space, the unit housing space is formed so that its depth gradually decreases from the toe side to the heel side, and the head seat adjustment unit is screwed to the sole portion. The projecting height of the unit that projects further downward from the sole portion by swinging the other end with respect to one end of the unit to be stopped and sliding in the toe-heel direction along the bottom surface of the unit housing space. It is possible to adjust the height.

  Since the present invention having the above configuration is based on the invention described in Patent Document 1 above, first, the basic configuration of the present invention in which the configurations of both inventions overlap will be described. In the golf club of the present invention, a through hole shape is used. The hosel part provided with the shaft insertion hole is integrally or separately provided on the head body, and the bottomed cylindrical shaft sleeve is fixed to the tip part of the shaft. The shaft sleeve is inserted into the shaft insertion hole from the upper end opening together with the shaft, and the adjusting unit is inserted into the lower end opening of the shaft insertion hole. The adjusting unit includes a retaining engagement portion so that it does not slip upward. Similarly, a fixed screw is inserted into the lower end opening of the shaft insertion hole, and this fixed screw is inserted into a screw insertion hole provided in the angle adjusting unit and screwed into a female screw portion provided in the end surface portion of the shaft sleeve. The unit and the shaft sleeve are detachably fixed to the hosel part.

  The shaft sleeve inserted into the shaft insertion hole is held at the peripheral edge of the upper end opening of the shaft insertion hole by the spherical bearing structure at the upper end portion of the insertion portion, while corresponding to the outer peripheral surface of the lower end portion of the insertion portion. A radial gap is set between the inner peripheral surface of the shaft insertion hole. Therefore, the shaft sleeve can swing relative to the hosel portion within the radial gap around the spherical bearing structure together with the shaft. Since the rotation preventing structure is provided between the hosel part and the shaft sleeve, the shaft sleeve does not rotate with respect to the hosel part. In addition, the angle adjusting unit is provided with a part of the spacer on the circumference, and when the spacer is inserted into the radial gap, the spacer presses the shaft sleeve, so that the head body swings with respect to the shaft sleeve. To do.

  Further, in the invention described in Patent Document 1, the shaft insertion hole and the shape of the shaft sleeve inserted into the shaft insertion hole are both round-shaped and inner-diameter cross-sectional shape of the shaft insertion hole and outer-diameter surface cross-sectional shape of the shaft sleeve. Since the head main body was formed into a shape, the head main body was able to oscillate in any direction of the entire circumference of 360 degrees. However, in the present invention, as a unique configuration, the sectional shape of the inner surface of the shaft insertion hole and the shaft sleeve The cross-sectional shape of the outer diameter surface of the head is a combination of an ellipse and a perfect circle, or a combination of ellipses having different major diameters, so that the swinging direction of the head body is perpendicular to the ball striking surface provided on the head body. It is stipulated in. Therefore, only the loft angle of the head body can be adjusted.

The following modes are conceivable for a combination of an ellipse and a perfect circle or a combination of ellipses having different major axes.
(1) The cross-sectional shape of the inner diameter surface of the shaft insertion hole is an elliptical shape whose major axis is oriented in a direction orthogonal to the ball striking surface, whereas the outer diameter surface cross-sectional shape of the shaft sleeve is the same as that of the inner diameter surface of the shaft insertion hole. A round shape with the same or almost the same size as the minor axis. In this case, the shaft sleeve can be relatively swung only in the major axis direction of the sectional shape of the inner diameter surface of the shaft insertion hole.
(2) The inner diameter cross-sectional shape of the shaft insertion hole is a circular shape, and the outer diameter surface cross-sectional shape of the shaft sleeve is equal to or substantially the same as the diameter of the inner diameter surface cross-sectional shape of the shaft insertion hole. The elliptical shape is oriented in a direction parallel to the hitting surface. In this case, the shaft sleeve can be relatively swung only in the minor axis direction of the outer diameter surface cross-sectional shape thereof.
(3) The cross-sectional shape of the inner diameter surface of the shaft insertion hole is an elliptical shape whose major axis is oriented in a direction orthogonal to the ball striking surface, whereas the outer diameter surface cross-sectional shape of the shaft sleeve is shorter than the inner diameter surface cross-sectional shape of the shaft insertion hole. The major axis having the same or almost the same size as the diameter is an elliptical shape oriented in a direction parallel to the ball striking surface. In this case, the shaft sleeve can be relatively swung only in the minor axis direction of the outer diameter surface cross-sectional shape thereof.
(4) The inner diameter cross-sectional shape of the shaft insertion hole is an elliptical shape whose major axis is oriented in a direction orthogonal to the ball striking surface, and the outer diameter surface cross-sectional shape of the shaft sleeve is the major axis of the inner diameter surface cross-sectional shape of the shaft insertion hole. The smaller major axis is oriented in the direction perpendicular to the ball striking surface, and the minor diameter equal to or substantially the same as the minor axis of the inner surface section of the shaft insertion hole is oriented in a direction parallel to the ball striking surface. The shape is elliptical. In this case, the shaft sleeve can be relatively swung only in the major axis direction of its outer diameter surface cross-sectional shape.

  Therefore, in any of the cases (1) to (4), the swinging direction of the head body is defined in a direction orthogonal to the striking surface provided on the head body, and therefore only the loft angle of the head body can be adjusted.

  Further, in the present invention, the loft angle of the head body becomes the largest when the spacer portion of the adjusting unit is positioned on the striking face side with respect to the lower end portion of the shaft sleeve inserted into the shaft insertion hole. Since the loft angle of the head body is the smallest when the spacer portion of the adjusting unit is located on the side of the ball striking spherical surface with respect to the lower end portion of the shaft sleeve inserted into the hole, the spacer portion is located between these two poles. It is only necessary to be able to rotate within the range of 180 degrees to about 180 degrees, and the following configuration can be adopted.

  That is, the end surface portion of the shaft sleeve has an elliptical shape or a shape that is eccentric with respect to the central axis of the shaft sleeve, and a tapered surface that is tapered downward is provided on the outer peripheral surface of the lower end portion of the shaft sleeve. A radial gap between the outer peripheral surface of the lower end portion of the shaft sleeve and the inner peripheral surface of the shaft insertion hole is provided with a shape in which the gap width gradually decreases from both the wide part of the circumference to the circumferential direction. . On the other hand, the spacer portion of the angle adjusting unit is provided with a thick portion located in the center in the circumferential direction, and this thick portion is located in the wide portion of the radial gap in the initial state of the loft angle adjustment.

  When the angle adjusting unit is rotated in one circumferential direction from this initial state, the spacer portion rotates in the same direction, and the thick wall portion enters the gradually narrowing shape in the radial gap, so that the lower end portion of the shaft sleeve is relatively This causes the head body to swing in the direction of increasing the loft angle. When the angle adjusting unit is rotated 90 degrees to about 90 degrees in the same direction, the thick part of the spacer part turns to the ball striking face side of the lower end of the shaft sleeve, and at this time the loft angle becomes maximum. At this time, by setting the shaft sleeve so as to reach the end of the relative swingable range, the adjusting unit can no longer turn in the same direction. You can know that

  On the other hand, when the adjusting unit is rotated from the initial state to the other circumferential direction, the spacer portion rotates in the same direction, and the thick portion enters the gradually narrowing shape in the radial gap, and the shaft sleeve The lower end portions are pressed relative to each other, so that the head body swings in the direction of decreasing the loft angle. When the angle adjusting unit is rotated by 90 degrees or approximately 90 degrees in the same direction, the thick part of the spacer part turns to the side of the hitting spherical surface at the lower end of the shaft sleeve, and at this time, the loft angle is minimized. At this time, by setting the shaft sleeve so as to reach the other end of the relative swingable range, the angle adjusting unit does not turn further in the same direction. You can know that. Therefore, the adjusting unit rotates within a range of about 180 degrees to about 180 degrees.

  In addition, since the present invention is specialized for adjusting the loft angle, the adjustable angle is preferably as large as possible. For example, a range of 4 degrees, plus or minus 2 degrees on the basis of a predetermined loft angle. It is desirable that it can be adjusted. Therefore, in order to increase the adjustment angle of the loft angle, the following configuration can be adopted.

  That is, the screw insertion hole provided in the angle adjusting unit has an elliptical shape extending in a direction away from the spacer portion provided in the angle adjusting unit, and thereby the direction in which the fixed screw is extended with respect to the angle adjusting unit. It can be fixed in an eccentric state. Therefore, the adjustable angle of the loft angle can be increased as compared with the case where the screw insertion hole has a perfect circular shape.

  Further, in the present invention, when the adjustable angle of the loft angle is set to be large as described above, there is a possibility that the sitting state with respect to the grounding surface of the head main body may become unstable. The following configurations can be adopted.

  That is, a concave unit housing space is provided in the heel side portion of the sole portion of the head body, and the head sitting adjustment unit is assembled in this unit housing space. The unit accommodating space is formed so that its depth gradually decreases from the toe side to the heel side of the head body. The head-sitting adjustment unit swings in the toe / heel direction along the bottom surface of the unit housing space with the other end swinging with respect to one end of the unit to be screwed to the sole, and further downward from the sole. Adjust the protruding height of the protruding unit. Therefore, when the loft angle is at a predetermined reference value, the unit is slightly protruded.When the loft angle is set large, the unit is retracted. When the loft angle is set small, the unit is further protruded. As described above, by properly using the loft angle depending on the magnitude of the loft angle, it is possible to stabilize the degree of sitting with respect to the ground contact surface of the head body in any case of the loft angle.

  According to the present invention having the above configuration, the user himself / herself can arbitrarily adjust the loft angle of the head body within a predetermined range, and even if the loft angle is changed, other lie angles and face angles are not changed. Since it is not changed, it is possible to sufficiently satisfy the user's request to increase the flight distance and to adjust only the loft angle. In addition, the shaft sleeve is prevented from rotating with respect to the hosel part, so that the direction of the shaft circumference relative to the head body does not change, so the natural frequency of the shaft does not change even after adjustment, and on the circumference with the back line It is also possible to use a grip having the following orientation. Further, since the adjustment is performed by loosening the fixing screw and rotating the angle adjusting unit, it is not necessary to remove the shaft from the head body. Since fixing is performed by tightening the screw, it is extremely strong and easy to readjust. Further, since the adjustment is a stepless adjustment limited to 180 degrees or approximately 180 degrees on the circumference, the user himself can perform a fine adjustment according to his / her preference.

  Further, according to the configuration of claim 2, it is possible to know that the loft angle is maximized when the adjustment unit is rotated 90 degrees to about 90 degrees in one direction of rotation and the rotation stops. In addition, it is possible to know that the loft angle is minimized when the adjustment unit is rotated 90 degrees to about 90 degrees in the other direction of rotation and the rotation stops. Therefore, since the adjustment work is easy to understand, it is easy for the user to use. According to the configuration of claim 3, the adjustable angle of the loft angle can be expanded, and according to the configuration of claim 4, the degree of sitting on the ground contact surface of the head body is stabilized even after the adjustment of the loft angle. can do.

Sectional drawing of the state which decomposed | disassembled the golf club which concerns on the Example of this invention FIG. 1A is a single view of a shaft sleeve in the golf club, (A) is a plan view, (B) is a front view, (C) is a bottom view, and (D) is a perspective view. FIG. 2 is a single view of the adjusting unit in the golf club, in which (A) is a plan view, (B) is a front view, (C) is a bottom view, and (D) is a perspective view. Sectional view of the golf club with the loft angle at the reference position Sectional view of the golf club with the maximum loft angle Sectional view of the golf club with the loft angle at the minimum angle The perspective view of the head main body sole part in the golf club It is a single item figure of the head sitting adjustment unit in the golf club, (A) is a front perspective view, (B) is a rear perspective view (A)-(C) is an operation explanatory view of the head sitting adjustment unit.

The present invention includes the following embodiments.
(1) The present invention is a technology related to the adjustment of the loft angle of a wood club head, and is also a technology related to head sitting adjustment.
(2) Configuration (2-1) The shape of the head / hosel hole is an ellipse about 1/2 from the upper end surface, and the rest is a perfect circle.
(2-2) The bottom of the sleeve to be mounted on the shaft is elliptical. Chamfer the corners of the bottom of the ellipse.
(2-3) A tilting unit having an oval screw hole is mounted from the bottom of the head body. The part in contact with the sleeve is processed at an angle, and the chamfered part at the bottom of the sleeve ellipse is contacted.
(2-4) Fasten and fix the head body, shaft / sleeve, and adjusting unit with fixing screws.
(2-5) Limit the movable range of the loft angle adjustment unit.
(2-6) On the sole heel side, a slide type sitting unit that adjusts the degree of sitting of the head is provided.

(3) Action (3-1) An ellipse (cam) is formed at the tip of the sleeve and combined with the angle adjusting unit, thereby producing an elliptical pendulum motion.
(3-2) Further, by elliptically processing the upper portion of the hosel hole, the movement of the head becomes a pendulum movement in a linear direction.
(3-3) The above action results in a pendulum motion with respect to the vertical axis with respect to the head, and only the loft angle is adjusted.
(3-4) The head-sitting adjustment unit is based on the maximum loft angle as the convex portion amount 0, and the convex amount is slid largely as the loft angle decreases, so that the optimum head sitting at an arbitrary loft angle is achieved. .
(4) Effect (4-1) When the convex portion of the adjusting unit is located on the short diameter side of the sleeve ellipse, the loft angle is not changed because it does not interfere with the sleeve ellipse.
(4-2) When the adjusting unit is rotated 90 degrees, the convex portion comes into contact with the long diameter side of the sleeve ellipse, and the loft angle is changed by pushing the sleeve.
(4-3) If the position of the head sitting unit at the maximum loft angle is used as a reference, the sitting unit position is set according to an arbitrary loft angle, and since it is a variable slide type, positioning can be performed easily.
(5) Variation (5-1) The same operation can be performed by making the hosel hole portion a straight hole and the shaft sleeve portion an elliptical shape.
(5-2) By changing the direction of the elliptical processed portion of the hosel hole, only the lie angle can be adjusted.
(5-3) The head sitting adjustment unit can also be a rail type unit.

  Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a state in which a golf club 1 according to an embodiment of the present invention is disassembled, and when assembled in a state where each component is coaxial, it is as shown in FIG. FIG. 2 is a single product diagram of the shaft sleeve 21, and FIG. 3 is a single product diagram of the adjusting unit 31.

  As shown in FIG. 1, a golf club 1 according to this embodiment includes a golf club head (also simply referred to as a head) 11, a shaft and a grip (both not shown), and a hosel joint system structure. The system structure is integrally provided in the head body 12 of the head 11 and has a hosel portion 16 provided with a shaft insertion hole 17 having a through-hole shape, and a bottomed base that is fixed to the tip end portion of the shaft and inserted into the shaft insertion hole 17. A cylindrical shaft sleeve 21, an angle adjustment unit 31 that is inserted into the shaft insertion hole 17 from its lower end opening and provided with a retaining engagement portion 33 so as not to escape upward, and a screw provided in the angle adjustment unit 31 A female inserted through the insertion hole 36 and provided on the end surface portion 28 of the shaft sleeve 21. And a fixing screw 41 freely fixing detachably the angle adjusting unit 31 and the shaft sleeve 21 relative to the hosel portion 16 by being screwed into the di-section 30.

  The head 11 includes a head main body 12 including a face portion 12a, a crown portion 12b, a sole portion, a heel portion, a back face portion (none of which are shown), and the hosel portion 16 integrally. . The face portion 12 a having the hitting surface 15 may be retrofitted separately from the head body 12. FIG. 1 shows a part of the head 11, and a striking surface provided in the face portion 12 a is denoted by reference numeral 15. In FIG. 1, the hitting surface 15 is a plane in a direction orthogonal to the paper surface, and is drawn on the left side surface of the head 11. Accordingly, FIG. 1 is a view of the head 11 as viewed from the heel side to the toe side of the head 11, and the left-right direction in FIG. 1 is a direction orthogonal to the ball striking surface 15, and the direction orthogonal to the paper surface is the ball striking surface. The direction is parallel to 15. 2 is a front view of the shaft sleeve 21 as viewed from the heel side to the toe side of the head 11 in a state where the shaft sleeve 21 is assembled to the head 11. FIG. B)). Accordingly, in the front view of FIG. 2B, the left side of the drawing is the ball striking surface side, the right side is the anti-hitting ball side, the left-right direction of the drawing is the direction perpendicular to the ball striking surface 15, and the direction perpendicular to the paper surface is the ball hitting The direction is parallel to the surface 15. Similarly, the angle adjusting unit 31 shown as a single product in FIG. 3 is a front view of the angle adjusting unit 31 viewed from the heel side to the toe side of the head 11 with the angle adjusting unit 31 assembled to the head 11. This is illustrated (FIG. 3B). Accordingly, in the front view of FIG. 3B, the left side of the drawing is the ball striking surface side, the right side is the anti-hitting surface side, the left-right direction of the drawing is the direction perpendicular to the ball striking surface 15, The direction is parallel to the surface 15.

  Returning to the description of FIG. 1, the shaft insertion hole 17 provided in the hosel portion 16 has a through-hole shape as described above, but its inner surface cross-sectional shape has four upper and lower steps along the central axis direction. In other words, the cross-sectional shape of the inner diameter surface of the upper end opening portion 17a of the shaft insertion hole 17 is a perfect circle, and the cross-sectional shape of the inner diameter surface of the upper step portion 17b below that is the long diameter of the ball striking surface of the head body 12. 15 is an elliptical shape oriented in a direction orthogonal to the hole 15, and the inner diameter surface sectional shape of the lower hole middle step portion 17 c is a perfect circle whose diameter is set slightly larger than the elliptical major axis of the hole upper step portion 17 b, The sectional shape of the inner diameter surface of the lower hole lower step portion 17d is a regular circle whose diameter is set slightly larger than the diameter of the circular shape of the middle hole step portion 17c. The step 18 between the hole middle step 17c and the hole lower step 17d is engaged with the angle adjusting unit 31 from below, and the angle adjusting unit 31 is prevented from coming off upward. Further, the hole lower step portion 17d has a tapered surface shape whose diameter gradually increases downward, and opens in the sole portion of the head main body 12 while maintaining the tapered surface shape. In the present invention, the ellipse includes an oval.

  As shown in FIG. 2, the shaft sleeve 21 fixed to the tip of the shaft has a bottomed cylindrical shape as described above, and is inserted and fixed to the tip of the shaft by means such as adhesion. The shaft sleeve 21 has an annular stepped portion 22 on the outer peripheral surface of the cylindrical portion, and a relatively small-diameter inserted portion 23 inserted into the shaft insertion hole 17 is formed below the stepped portion 22 as a boundary. A relatively large diameter hosel extension 24 is provided above the hosel portion 16 without being inserted into the shaft insertion hole 17.

  The step portion 22 is held by being abutted against and held by the peripheral edge portion of the upper end opening of the shaft insertion hole 17, that is, the upper end portion of the hosel portion 16, and is provided with a spherical bearing structure. An anti-rotation structure that prevents the sleeve 21 from rotating is provided. The spherical bearing structure includes a combination of an annular concave spherical surface portion 19 (FIG. 1) provided at the peripheral edge of the upper end opening of the shaft insertion hole 17 and an annular convex spherical surface portion 25 provided at the stepped portion 22. The spherical surface portions 19 and 25 slide to exhibit the bearing function. On the other hand, the non-rotating structure includes a part of the recess 20 (FIG. 1) provided on the peripheral edge of the upper end opening of the shaft insertion hole 17 and a part of the protrusion 26 provided on the step 22. , And the concave portion 20 and the convex portion 26 are engaged in the circumferential direction, so that the anti-rotation function is exhibited. It is preferable to provide a plurality of combinations (for example, a quadratic shape) of the concave portions 20 and the convex portions 26 on the circumference.

  The inserted portion 23 of the shaft sleeve 21 has an outer peripheral surface formed in a cylindrical shape that is straight in the axial direction, and has an outer diameter surface cross-sectional shape of the shaft insertion hole 17 in the upper step portion 17b of the shaft insertion hole 17 as shown in FIG. An elliptical shape in which the major axis having the same or substantially the same size as the minor axis of the ellipse having an inner diameter cross-sectional shape is directed in a direction parallel to the ball striking surface 15 is used. Accordingly, this corresponds to (3) of the combinations (1) to (4) of the combination of the above ellipse and a perfect circle or the combination of ellipses having different major diameters, and the shaft sleeve 21 has the above spherical bearing structure. Can be swung only in the minor axis direction of the cross-sectional shape of the outer diameter surface, that is, in the direction orthogonal to the ball striking surface 17. In FIG. 4 showing the assembled state of each component, the upper hole portion 17b of the shaft insertion hole 17 is drawn with an elliptical long diameter, and the inserted portion 23 of the shaft sleeve 21 is drawn with an elliptical short diameter. A radial gap is set between the inner peripheral surface of the portion 17b and the outer peripheral surface of the inserted portion 23, and the shaft sleeve 21 can swing within the range of this gap.

  As shown in FIG. 4, when the shaft sleeve 21 is inserted into the shaft insertion hole 17, the lower end portion thereof is positioned at the middle hole portion 17c of the shaft insertion hole 17. As described above, since the diameter of the shaft is slightly larger than the elliptical long diameter of the upper hole step portion 17b, the outer peripheral surface of the lower end portion of the shaft sleeve 21 and the inner peripheral surface of the hole middle step portion 17c opposed thereto. A radial gap 27 is set around the entire circumference.

  Further, as shown in FIG. 2C, the shaft sleeve 21 has an elliptical shape in which the end surface portion 28 has a major axis in a direction orthogonal to the ball striking surface 15, and toward the heel side with respect to the central axis of the shaft sleeve 21. An eccentric shape is formed, and a tapered surface 29 tapered toward the lower side is provided on the outer peripheral surface of the lower end portion of the shaft sleeve 21. Accordingly, in the radial gap 27 provided between the outer peripheral surface of the lower end portion of the shaft sleeve 21 and the inner peripheral surface of the hole middle step portion 17c, the size of the gap is set depending on the position on the circumference thereof. Specifically, a wide portion 27a having the largest gap width is provided at one location on the toe side of the circle (at the 6 o'clock position of the watch as viewed from the bottom of FIG. 2C), A narrow portion 27b having a relatively small gap width at a position displaced from the wide portion 27a on the toe side by about 90 degrees in both the circumferential directions (9 o'clock position on the striking surface side and 3 o'clock position on the counter striking surface side). And the width of the gap 27 gradually decreases from the wide portion 27a to the narrow portion 27b. A female screw portion (female screw hole) 30 for screwing the fixing screw 41 is provided on the end surface portion 28 of the shaft sleeve 21. The female screw portion 30 is provided concentrically with the central axis of the shaft sleeve 21. It has been.

  As shown in FIG. 3, the adjusting unit 31 has a disk-shaped main body 32 that is inserted into the shaft insertion hole 17 from the lower end opening thereof, and a ring-shaped or step-like shape that has a bowl shape or a step shape on the outer peripheral surface of the disk-shaped main body 32. A retaining engagement portion 33 is provided. The retaining engagement portion 33 engages with the step 18 in the shaft insertion hole 17 in the axial direction, and prevents the angle adjusting unit 31 from slipping upward.

  In addition, a part of the spacer 34 on the circumference is integrally formed on the upper end surface of the disk-shaped main body 32 along the outer peripheral edge thereof. FIG. 3A shows a plan view of the adjusting unit 31, and as shown in FIG. 3A, the spacer portion 34 is arcuate or substantially arcuate when viewed from one side (above) in the axial direction. To form a partial shape on the circumference of the cylinder, and this is inserted into the radial gap 27 from below at a portion on the circumference. The circular arc shape of the spacer 34 is a position on the toe side from the position on the striking surface side of the disc-shaped main body 32 (9 o'clock position on the striking surface side as if the plan view of FIG. It is provided over 180 degrees from the 12 o'clock position) to the position on the recoil ball side (3 o'clock position). The thickness in the radial direction of the spacer portion 34 is the thickest thick portion 34a inward in the radial direction at the toe side position (12 o'clock position), and the radial direction extends from the thick portion 34a to both end portions 34b. The thickness is gradually reduced. Further, a tapered surface 35 for gradually decreasing the radial thickness of the spacer portion 34 upward is provided on the upper inner peripheral surface of the spacer portion 34, and this tapered surface 35 is provided on the outer peripheral surface of the lower end portion of the shaft sleeve 21. It faces the tapered surface 29.

  In addition, a screw insertion hole 36 for inserting the fixing screw 41 is provided in the disk-shaped main body 32. The screw insertion hole 36 is an elliptical shape extending in a direction away from the thick part 34a of the spacer part 34. In other words, it has an elliptical shape with a major axis in a direction parallel to the ball striking surface 15 and is provided at a position eccentric to the heel side. Further, a countersunk-shaped seating surface 37 for seating the head 42 of the fixed screw 41 on the lower end surface of the disc-shaped main body 32 and at the opening peripheral edge of the screw insertion hole 36 is provided. Since 36 is elliptical, this seating surface 37 is also elliptical. Furthermore, a notch-shaped jig engaging portion 38 for engaging a jig for rotating the adjusting unit 31 is provided at one position on the lower end surface of the disk-shaped main body 32 on the circumference. .

  The fixing screw 41 is integrally provided with a head portion 42 and a shaft portion 43, and a male screw portion 44 is provided at the tip of the shaft portion 43. Since the head portion 42 and the shaft portion 43 are arranged concentrically, the fixing screw 41 is not provided with an elliptical portion or an eccentric portion.

  In the above configuration, the components are assembled in the state shown in FIG. 4, and the state shown in FIG. 4 is used as a reference position for adjusting the loft angle θ. The loft angle θ is increased or decreased from the angle at the reference position, and is adjusted, for example, in a range of 2 degrees for each of plus and minus. In the state of FIG. 4, the components are coaxially arranged, and the wide portion 27a in the radial gap 27 provided between the outer peripheral surface of the lower end portion of the shaft sleeve 21 and the inner peripheral surface of the hole middle step portion 17c is the shaft sleeve. The thick portion 34 a of the spacer portion 34 in the adjusting unit 31 is also arranged on the toe side of the lower end portion of the shaft sleeve 21. Therefore, since the thick part 34a is located in the wide part 27a, the lower end part of the shaft sleeve 21 and the spacer part 34 of the adjusting unit 31 are in a positional relationship that does not interfere with each other. The unit 31 can be assembled on the same axis.

  When adjusting the loft angle θ from the reference position shown in FIG. 4 in a direction to increase the loft angle θ, as shown in FIG. 5, the fixing screw 41 is loosened so as not to be removed, and the adjusting unit 31 is rotated counterclockwise as viewed from above. Then, the thick portion 34a of the spacer portion 34 moves from the toe side wide portion 27a in the radial gap 27 toward the ball striking face side narrow portion 27b. At this time, the width of the radial gap 27 gradually decreases. Since the outer diameter of the lower end portion of the shaft sleeve 21 gradually increases, the thick portion 34a of the spacer portion 34 begins to interfere with the lower end portion of the shaft sleeve 21, and the shaft sleeve 21 is assumed not to move (swing). Is gradually lifted in the direction of arrow E toward the ball striking surface, and the loft angle θ gradually increases. When the rotation of the adjusting unit 31 reaches 90 degrees or substantially 90 degrees and the thick part 34a reaches the narrow part 27b on the striking face side, the outer peripheral surface of the inserted part 23 in the shaft sleeve 21 is the shaft in the hosel part 16. Since the shaft sleeve 21 reaches one end of the swinging by contacting the inner peripheral surface of the insertion hole 17 or the like, the angle adjusting unit 31 cannot rotate any more, and the loft angle θ is maximum (plus 2). Degree state). Accordingly, since the increase angle of the loft angle θ is linked to the rotation angle of the adjusting unit 31, the adjusting unit 31 is rotated at an arbitrary angle and the fixing screw 41 is tightened, so that the loft angle θ is within a range of plus 2 degrees. Can be adjusted arbitrarily. Further, since the angle adjusting unit 31 does not rotate any more when it is rotated 90 degrees or approximately 90 degrees, it is known that the adjustable loft angle θ is maximized when the angle adjusting unit 31 stops rotating. be able to.

  Further, when adjusting the loft angle θ from the reference position in FIG. 4 in a direction to reduce the loft angle θ, as shown in FIG. 6, the fixing screw 41 is loosened so as not to come off, and the adjusting unit 31 is rotated clockwise as viewed from above. When rotated, the thick part 34a of the spacer part 34 moves from the toe side wide part 27a in the radial gap 27 toward the counter hitting spherical side narrow part 27b. At this time, the width of the radial gap 27 gradually increases. Since the outer diameter of the lower end portion of the shaft sleeve 21 gradually increases and the thick portion 34a of the spacer portion 34 begins to interfere with the lower end portion of the shaft sleeve 21, the shaft sleeve 21 does not move (does not swing). 11 is gradually lifted in the direction of arrow F toward the hitting spherical surface, and the loft angle θ gradually decreases. When the rotation of the adjusting unit 31 reaches 90 degrees or substantially 90 degrees and the thick wall portion 34a reaches the narrow portion 27b on the side of the hitting spherical surface, the outer peripheral surface of the inserted portion 23 in the shaft sleeve 21 is in the hosel portion 16. Since the shaft sleeve 21 reaches the other end limit of the swing by contacting the inner peripheral surface of the shaft insertion hole 17, the angle adjusting unit 31 can no longer rotate, and at this time, the loft angle θ is minimum ( Minus 2 degrees). Therefore, since the decreasing angle of the loft angle θ is linked to the rotation angle of the adjusting unit 31, the adjusting unit 31 is rotated by an arbitrary angle and the fixing screw 41 is tightened so that the loft angle θ is within a range of minus 2 degrees. Can be adjusted arbitrarily. Further, since the adjusting unit 31 does not rotate any more when it is rotated 90 degrees or approximately 90 degrees, it is known that the adjustable loft angle θ is minimized when the adjusting unit 31 stops rotating. be able to.

  Further, in the golf club 1 having the above-described configuration, the swinging direction of the shaft sleeve 21 with respect to the shaft insertion hole 17 of the hosel portion 16 is limited to the direction orthogonal to the ball striking surface 15, so that the angle adjustment is performed with the loft angle θ Specialized in coordination. Further, the screw insertion hole 36 provided in the angle adjusting unit 31 has an elliptical shape extending in a direction away from the spacer portion 34, so that the fixing screw 41 can be fixed to the angle adjusting unit 31 in an eccentric state. Therefore, the adjustable angle of the loft angle θ is enlarged.

  Next, a head sitting adjustment unit relating to the invention according to claim 3 of the present application will be described.

  As described above, in the present invention, the adjustable angle of the loft angle θ of the hitting surface 15 in the head main body 12 is set to be large, and accordingly, the seating condition with respect to the ground contact surface of the head main body 12 may become unstable. is there. Therefore, in order to cope with this, the following configuration is also employed.

That is, as shown in FIG. 7, a recessed unit accommodation space 51 is provided on the heel side of the sole portion 12 c in the head body 12, and the head seat adjustment unit 55 shown in FIG. 8 is assembled in this unit accommodation space 51. The head seat adjustment unit 55 uses the fact that the shape of the sole portion 12c is generally a curved surface convex downward, and the other end portion of the head seat adjustment unit 55 is screwed to the sole portion 12c. By swinging 55b, the projecting height of the unit 55 projecting further downward from the sole portion 12c can be adjusted, that is, the loft angle θ is a reference value having a predetermined size (FIG. 4). to when in the state) of the show in FIG. 9 (slightly protrude the unit 55 as shown in a) (protrusion amount t _1), when setting a large loft angle theta (state of FIG. 5) As shown in FIG. 9B, when the loft angle θ is set small (state of FIG. 6) when the unit 55 is not retracted and protruded as shown in FIG. unit (Indicating the amount of projection at _{t 2, t 2> t 1} ) to further protrude to the 55 magnitude of the loft angle θ by selectively used according to the magnitude of the loft angle θ so called head either case body 12 It is possible to stabilize the degree of sitting on the ground plane.

  For this reason, as shown in FIG. 7, a screw hole 52 for screwing the fixing screw 60 is provided on the bottom surface of the concave unit housing space 51 at a position on the hitting surface side. The mounting angle of the unit 55 is changed stepwise by engaging the other end portion 55b of the head seat adjustment unit 55 at the bottom surface of the concave-shaped unit accommodating space 51 on the side of the hitting spherical surface. An engaging portion 53 is provided for defining in 5 stages. Since the head-sitting adjustment unit 55 slides on the bottom surface of the concave unit housing space 51, the depth of the concave unit housing space 51 is such that the protruding height gradually increases when sliding from the toe side to the heel side. It is set so that it gradually becomes shallower from the toe side to the heel side. Further, as shown in FIG. 8, a screw insertion hole 56 for inserting the fixing screw 60 and a head of the fixing screw 60 are accommodated in one end portion 55a of the frame-shaped head seat adjustment unit 55 having a substantially fan shape. A recess 57 is provided. Since one surface of the head sitting adjustment unit 55 forms a part of the sole surface, it is a smooth surface 58. A recess 59 for adjusting the unit weight is provided on the other surface of the head sitting adjustment unit 55.

DESCRIPTION OF SYMBOLS 1 Golf club 11 Head 12 Head main body 15 Hitting surface 16 Hosel part 17 Shaft insertion hole 21 Shaft sleeve 27 Radial gap 27a Wide part 28 End surface part 31 Adjusting unit 34 Spacer part 34a Thick part 41 Fixed screw 51 Unit accommodation space 55 Head sitting adjustment unit

Claims (4)

A hosel part provided integrally or separately with the head body and provided with a shaft insertion hole in the form of a through hole, a bottomed cylindrical shaft sleeve fixed to the tip part of the shaft and inserted into the shaft insertion hole, An angle adjustment unit that is inserted into the shaft insertion hole from its lower end opening and provided with a retaining engagement portion so that it does not come out upward, and is inserted through a screw insertion hole provided in the angle adjustment unit and A fixing screw that removably fixes the angle adjusting unit and the shaft sleeve to the hosel part by being screwed into a female screw part provided on an end surface part of the shaft sleeve;
A spherical bearing structure is provided on the peripheral edge of the upper end opening of the shaft insertion hole and the shaft sleeve corresponding thereto, and a detent structure is provided between the hosel part and the shaft sleeve, and is inserted into the shaft insertion hole. A radial gap is set between the outer peripheral surface of the lower end portion of the shaft sleeve and the corresponding inner peripheral surface of the shaft insertion hole, and a part of the spacer portion on the circumference provided in the angle adjusting unit is A golf club in which the head body is swingable relative to the shaft sleeve by being inserted into the radial gap,
Further, the shaft insertion hole and the shaft sleeve inserted into the shaft insertion hole are different from each other in that the inner diameter surface cross-sectional shape of the shaft insertion hole and the outer diameter surface cross-sectional shape of the shaft sleeve are different from each other in combination of an ellipse and a perfect circle. The head body swinging direction relative to the shaft sleeve is defined in a direction orthogonal to the striking surface provided on the head body, and only the loft angle of the head body can be adjusted. The golf club characterized by being said. The golf club according to claim 1,
The shaft sleeve has an elliptical surface or an eccentric shape with respect to the central axis of the shaft sleeve, and a tapered surface that is tapered downward is provided on the outer peripheral surface of the lower end of the shaft sleeve. The radial gap between the outer peripheral surface of the lower end portion of the shaft sleeve and the inner peripheral surface of the shaft insertion hole has a shape in which the gap width gradually narrows from both the wide part of the circumference to the circumferential direction. Provided,
The spacer portion provided in the angle adjustment unit is located in the wide portion in the initial state of the loft angle adjustment, the thick portion at the center in the circumferential direction,
When the angle adjusting unit is rotated in one circumferential direction from the initial state, the spacer portion rotates in the same direction, and the thick wall portion enters into a gradually narrowing shape in the radial gap, and the shaft sleeve When the lower end part is pressed relatively, the head main body swings in the direction of increasing the loft angle, and when the adjusting unit is rotated 90 degrees or substantially 90 degrees in the same direction, the thick wall part becomes the shaft sleeve The lower end of the lower end of the ball hits the ball striking surface, and at this time, the loft angle is maximized, and when the shaft sleeve reaches one end of the relative swingable range, the angle adjusting unit does not rotate any more.
When the angle adjusting unit is rotated in the other circumferential direction from the initial state, the spacer portion rotates in the same direction, and the thick wall portion enters into a gradually narrowing shape in the radial gap, and the shaft sleeve When the lower end part is pressed relatively, the head body swings in the direction of decreasing the loft angle, and when the angle adjusting unit is rotated 90 degrees or substantially 90 degrees in the same direction, the thick wall part becomes the shaft sleeve The lower end portion of the lower end portion of the ball hits to the side of the hitting spherical surface, and at this time, the loft angle is minimized, and when the shaft sleeve reaches the other end of the relative swingable range, the angle adjusting unit does not rotate any more,
The golf club according to claim 1, wherein the angle adjustment unit has a rotatable range of 180 degrees to about 180 degrees. In the golf club according to claim 1 or 2,
The screw insertion hole provided in the angle adjusting unit has an elliptical shape extending in a direction away from the spacer portion, so that the fixing screw can be fixed in an eccentric state with respect to the angle adjusting unit. Thus, the adjustable angle of the loft angle is expanded thereby. The golf club according to claim 1, 2, or 3,
A concave unit housing space is provided in the heel side portion of the sole portion of the head body, and a head seat adjustment unit is assembled in the unit housing space, and the unit housing space is provided with a depth from the toe side to the heel side. The head-sitting adjustment unit is formed so as to be gradually shallower, and the other end of the head-sitting adjustment unit swings with respect to one end of the unit that is screwed to the sole portion, and the toe-heel direction is along the bottom surface of the unit housing space. A golf club characterized in that the projecting height of the unit projecting further downward from the sole portion can be adjusted by sliding toward the bottom.

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