JP2016010632A - Golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a golf club enabling easiness of bending a shaft to be changed without changing a neck length.SOLUTION: A golf club comprises: a shaft 2 having a tip and a rear end; a golf club head having a hosel part 3 including an opening to attach the shaft 2; a first adjusting mechanism including an insert member 5 formed in a cylindrical shape and covering the outer peripheral surface of the shaft 2, and formed so as to adjust a length in the axial direction of restricting the shaft 2 on the basis of the insert member 5; and a second adjusting mechanism continuously provided on the rear end of the shaft 2, including an extension member 7 attachable/detachable to/from the rear end of the shaft 2, and formed so as to adjust a length in the axial direction of the shaft 2 on the basis of the extension member 7. The second adjusting mechanism is formed so as to increase/decrease a length in the axial direction of the shaft 2, by the amount of increase/decrease of a length in the axial direction of restricting the tip of the shaft 2 by the first adjusting mechanism.

Description

  The present invention relates to a golf club.

  In recent years, golf clubs capable of exchanging shafts have been proposed in response to user requests. In addition to changing the length, the shaft is exchanged to change the deflection by changing to a shaft having a different hardness. However, if the shaft itself is replaced to change the deflection, there is a problem that the cost increases. Thus, Patent Document 1 proposes a golf club that can change the hardness without replacing the shaft.

  That is, in the golf club of Patent Document 1, the length of the hosel (hereinafter referred to as “the hosel part”) is obtained by attaching the shaft to the hosel part of the golf club head as it is and attaching the cylindrical extension member to the opening of the hosel part. It is configured to be able to take a second mode in which the shaft is attached after lengthening the hosel length). Thereby, since the hosel length can be changed, the ease of bending of the shaft can be changed without changing the shaft itself.

Japanese Patent No. 5447141

  However, in the golf club as described above, the easiness of bending of the shaft is changed by extending the hosel from the upper end of the hosel portion of the head body toward the shaft end by attaching the extension member. Therefore, in the region above the upper end of the hosel part of the head body, the length of the portion that connects the shaft and the head (hereinafter also referred to as “neck”) is increased by the length of the extension member. There is a problem that the change in the length of the neck makes the user feel uncomfortable.

  In one aspect, the present invention has been made in consideration of such points, and an object of the present invention is to provide a golf club that can change the flexibility of the shaft without changing the length of the neck. That is.

  A golf club according to an aspect of the present invention is disposed in a shaft having a front end portion and a rear end portion, a golf club head having a hosel portion including an opening for attaching the shaft, and an internal space of the hosel portion, A shaft fixing member to which a tip end portion of the shaft is fixed, a cylindrical engaging member configured to be engaged with an opening of the hosel portion, and covering an outer peripheral surface of the shaft, and a cylindrical shape covering an outer peripheral surface of the shaft And an insert member that can be disposed between the shaft fixing member and the engagement member, and is configured to be capable of adjusting an axial length for restraining the shaft based on the insert member. An adjustment mechanism, and an extension member that is continuously provided at a rear end portion of the shaft and is attachable to and detachable from the rear end portion of the shaft. A second adjustment mechanism configured to be adjustable in length in the direction, wherein the second adjustment mechanism is an amount by which an axial length for restraining the tip end portion of the shaft is increased or decreased by the first adjustment mechanism. Only the axial length of the shaft can be increased or decreased.

  In the golf club according to this configuration, the length in the axial direction that restrains the tip of the shaft is adjusted by the first adjustment mechanism. Specifically, the insert member can be disposed between the engaging member that engages with the opening of the hosel portion of the golf club head and the fixing member that fixes the tip end portion of the shaft. Therefore, in the golf club according to the configuration, the shaft is inserted into the hosel portion by attaching / detaching the insert member or exchanging between the insert members having different lengths without changing the positional relationship between the opening of the hosel portion and the engaging member. The depth can be changed.

  That is, the position of the neck does not change because the positional relationship between the opening of the hosel part and the engaging member does not change depending on whether the insert member is attached or detached or exchanged between insert members having different lengths. On the other hand, since the depth at which the shaft is inserted into the hosel part can be changed by attaching or detaching the insert member or exchanging between insert members having different lengths, the length of the constrained portion at the tip of the shaft can be changed. it can. The length of the restraining portion at the tip portion of the shaft corresponds to the length of the portion that does not bend at the tip portion of the shaft. Therefore, according to the golf club which concerns on the said structure, the easiness of bending of a shaft can be changed, without changing the length of a neck.

  However, when the depth at which the shaft is inserted into the hosel portion by the first adjustment mechanism changes, the length from the grip end to the golf club head (hereinafter also referred to as “club length”) also changes. This change in club length may make the user feel uncomfortable. Therefore, in the golf club according to the configuration, the second adjustment mechanism that can increase or decrease the axial length of the shaft is provided by the amount by which the depth of inserting the shaft into the hosel portion is increased or decreased by the first adjustment mechanism. . Since the club length can be kept constant by the second adjusting mechanism, it is possible to provide a golf club that can change the ease of bending of the shaft without making the user feel uncomfortable.

  Further, as another form of the golf club according to the one aspect, an axial length of the extension member may be configured to correspond to an axial length of the insert member, and the first adjustment The mechanism takes a first aspect in which the engagement member is attached to the shaft fixing member and a second aspect in which the insert member is disposed between the shaft fixing member and the engagement member. The second adjusting mechanism may include a first mode in which the extension member is removed from a rear end portion of the shaft, and a second mode in which the extension member is attached to the rear end portion of the shaft. It may be configured to be able to take

  As another form of the golf club according to the one aspect, the second adjusting mechanism may include a plurality of extension members having different axial lengths, and the axial lengths of the plurality of extension members. The difference in height may be configured to correspond to the length of the insert member in the axial direction. Furthermore, the first adjustment mechanism includes a first mode in which the engagement member is attached to the shaft fixing member, and a second mode in which the insert member is disposed between the shaft fixing member and the engagement member. The second adjustment mechanism may be configured to selectively attach one of the plurality of extension members to the rear end of the shaft, thereby The length in the axial direction may be adjustable.

  As another form of the golf club according to the one aspect, the first adjusting mechanism may include a plurality of the insert members having different axial lengths, and the axial length of the extending member is The plurality of insert members may be configured to correspond to a difference in length in the axial direction. In addition, the first adjustment mechanism selectively disposes one of the plurality of insert members between the shaft fixing member and the engagement member, thereby restraining the shaft in the axial direction. The second adjustment mechanism may include a first aspect in which the extension member is removed from a rear end portion of the shaft, and the extension member is attached to the rear end portion of the shaft. You may be comprised so that the 2nd aspect can be taken.

  As another form of the golf club according to the one aspect, the first adjustment mechanism may include a plurality of the insert members having different axial lengths, and the second adjustment mechanism is A plurality of the extending members having different lengths may be included. Furthermore, the difference in the axial length of the plurality of extension members may be configured to correspond to the difference in the axial length of the plurality of insert members. The first adjustment mechanism selectively disposes one of the plurality of insert members between the shaft fixing member and the engagement member, thereby restraining the shaft in the axial direction. The second adjusting mechanism is configured to selectively attach one of the plurality of extending members to the rear end portion of the shaft, so that the axial length of the shaft can be adjusted. May be configured to be adjustable.

  Further, as another form of the golf club according to the one aspect, a concave portion that opens to the rear end portion side may be provided, and one end portion of the extension member is formed so as to be fitted into the concave portion. A convex part may be provided,

  As another form of the golf club according to the one aspect, the shaft has a hollow portion that opens to the rear end portion side, and the hollow portion is radially outward at the rear end portion of the shaft. An annular outer wall portion may be provided that surrounds. In addition, an outer ring portion that can be fitted to the outer wall portion from the radially outer side is disposed at one end portion of the extension member, and a hollow portion of the shaft that is disposed radially inward of the outer ring portion. An inner ring portion that can be inserted into the inner ring portion may be provided.

  The insert member may be configured to take a cylindrical state covering the outer peripheral surface of the shaft and a divided state where the insert member is divided in the circumferential direction and separated from the outer peripheral surface of the shaft. Further, the engaging member may be configured to be movable in the axial direction of the shaft. And after an engaging member moves to an axial direction along a shaft from a 1st aspect, a 2nd aspect is taken by arrange | positioning an insert member between a shaft fixing member and an engaging member. Also good.

  ADVANTAGE OF THE INVENTION According to this invention, the golf club which can change the ease of bending of a shaft can be provided, without changing the length of a neck.

FIG. 1 is a perspective view illustrating the overall structure of a golf club according to an embodiment. FIG. 2 is a plan view illustrating the golf club head according to the embodiment. FIG. 3 is an exploded view illustrating a connection structure between the golf club head and the shaft according to the embodiment. FIG. 4 is a cross-sectional view schematically illustrating the internal space of the hosel part according to the embodiment. FIG. 5 is a front view schematically illustrating the shaft fixing member according to the embodiment. FIG. 6 is a front view schematically illustrating the engaging member according to the embodiment. FIG. 7A is a front view schematically illustrating the insert member (cylindrical state) according to the embodiment. FIG. 7B is a perspective view schematically illustrating the insert member (divided state) according to the embodiment. FIG. 8 is a cross-sectional view schematically illustrating the extension member according to the embodiment. FIG. 9 shows a comparative example of club lengths in two aspects of the golf club according to the embodiment. FIG. 10 shows a comparative example of club lengths in two modes of a golf club according to a modification. FIG. 11 shows a comparative example of club lengths in two modes of a golf club according to a modification. FIG. 12 shows a comparative example of club lengths in two modes of a golf club according to a modification. FIG. 13 is a front view schematically illustrating a shaft fixing member according to a modification. FIG. 14A schematically illustrates an insert member (cylindrical state) according to a modification. FIG. 14B is a perspective view schematically illustrating an insert member (divided state) according to a modification. FIG. 15 illustrates a method for fixing an insert member and a shaft fixing member according to a modification. FIG. 16 illustrates an extension member according to a modification. FIG. 17A shows a modification of the mechanism for attaching the extension member to the shaft (with the extension member removed). FIG. 17B shows a modification of the mechanism for attaching the extension member to the shaft (a state in which the extension member is attached). FIG. 18A shows a modification of the mechanism for attaching the extension member to the shaft. FIG. 18B illustrates an extension member according to a modification.

  Hereinafter, an embodiment according to an aspect of the present invention (hereinafter, also referred to as “this embodiment”) will be described with reference to the drawings. However, this embodiment described below is only an illustration of the present invention in all respects. Various improvements and modifications may be made without departing from the scope of the present invention. That is, in implementing the present invention, a specific configuration according to the embodiment may be adopted as appropriate. In the following description, for convenience of description, the description will be made with reference to the direction in the drawing.

§1. Overall Structure of Golf Club First, the overall structure of a golf club will be described with reference to FIGS. FIG. 1 is a perspective view illustrating the overall structure of a golf club 100 according to this embodiment. FIG. 2 is a plan view illustrating the golf club head 1 according to this embodiment. FIG. 3 is an exploded view illustrating a connection structure between the shaft 2 and the golf club head 1.

  As illustrated in FIGS. 1 and 2, the golf club 100 according to this embodiment includes a shaft 2 and a golf club head 1 (hereinafter simply referred to as “head”) connected to an end portion (lower end portion 21) thereof. For example). As illustrated in FIG. 3, the shaft 2 and the golf club head 1 are connected via a first adjusting mechanism (an engaging member 4, an insert member 5, and a shaft fixing member 6) described later. The grip end 231 of the shaft 2 is configured to be connectable with a second adjusting mechanism (extension member 7) described later. Thereby, in this embodiment, the ease of bending of the shaft can be changed without changing the club length and the neck length. The club length may not be strictly defined as long as it can indicate the approximate length from the end of the shaft 2 on the grip end 231 side to the bottom surface of the head 1. The club length can be measured by, for example, the 60-degree method, the heel end method, or the like prescribed in the golf rules. Further, the neck length may not be strictly defined as long as it can indicate the approximate length from the upper end (upper end portion 36) of the hosel portion 3 to the upper end (upper end portion 43) of the engaging member 4.

  The shaft 2 includes a shaft main body 20 formed in a hollow cylindrical shape and a cylindrical grip 23 opened to the lower end side. The shaft body 20 has a lower end portion 21 and an upper end portion 22 at both ends in the axial direction, and is configured such that the outer shape becomes thicker from the lower end portion 21 toward the upper end portion 22. The golf club head 1 is connected to the lower end portion 21 of the shaft body 20. Further, as illustrated in FIG. 3, a grip 23 made of rubber or the like is fixed to the upper end portion 22 of the shaft body 20. An extension member 7 described later can be attached to the grip end 231 of the grip 23.

  The material of the shaft body 20 may be appropriately selected according to the embodiment. For example, CFRP (carbon fiber reinforced plastic), steel, or the like may be used. The lower end portion 21 of the shaft body 20 corresponds to the “tip portion of the shaft” of the present invention. The grip end 231 corresponds to the “rear end portion of the shaft” of the present invention. Further, the extending direction of the shaft 2 (shaft body 20) corresponds to the “axial direction” of the present invention. However, the “axial direction” may not be strictly defined as long as it can indicate a direction connecting the upper end portion and the lower end portion of each member.

  The golf club head 1 has a hollow structure. As illustrated in FIGS. 1 and 2, the outer surface of the golf club head 1 is formed by a face portion 11, a crown portion 12, a sole portion 13, a side portion 14, and a hosel portion 3. The face portion 11 has a face surface that is a surface for hitting a golf ball. The crown portion 12 is adjacent to the face portion 11 and constitutes the upper surface of the head 1. The sole portion 13 constitutes the bottom surface of the head 1 and is adjacent to the face portion 11 and the side portion 14. The side portion 14 is a portion between the crown portion 12 and the sole portion 13 and extends from the toe side of the face portion 11 to the heel side of the face portion 11 through the back side of the head 1.

  Further, the hosel portion 3 is a cylindrical portion provided adjacent to the heel side of the crown portion 12, and has an attachment hole (opening) 31 for attaching the shaft 2. Specifically, a shaft fixing member 6 (described later) fixed to the tip end portion of the shaft 2 is inserted into the mounting hole 31 together with the shaft 2. The internal structure of the hosel part 3 will be described in detail later. The head 1 described in the present embodiment is a wood type such as a driver (# 1) or a fairway wood, but the type is not limited, and various types such as a so-called utility type, hybrid type, and iron type are available. There may be.

§2 Connecting structure of shaft and golf club head (first adjusting mechanism)
Next, a connection structure between the shaft 2 and the golf club head 1 will be described with reference to FIGS. 3 and 4 to 7B. As illustrated in FIG. 3, the lower end portion 21 of the shaft body 20 is fixed by the shaft fixing member 6. An engaging member 4 is disposed on the upper end side of the shaft fixing member 6, and an insert member 5 can be disposed between the engaging member 4 and the shaft fixing member 6. Thereby, the length which fixes (restrains) the lower end part 21 of the shaft main body 20 can be extended.

  The insert member 5 and the shaft fixing member 6 are configured to be insertable into the mounting hole 31 of the hosel portion 3, but the engaging member 4 is engaged with the upper end of the hosel portion 3 (opening edge of the mounting hole 31). Configured to match. Therefore, whether the insert member 5 is attached or not, the shaft fixing member 6 is inserted into the attachment hole 31 until the engagement member 4 engages with the upper end of the hosel portion 3, and the shaft The lower end 21 of the main body 20 can be inserted into the internal space of the hosel part 3. At this time, the shaft fixing member 6 (and the insert member 5) can be fixed using the washer 93 and the fixture 9 while being accommodated in the internal space of the hosel portion 3. Thereby, the shaft 2 (shaft main body 20) and the golf club head 1 are connected. Hereafter, each component of this connection structure is demonstrated.

[Hosel part]
First, the internal space of the hosel part 3 in which the insert member 5 and the shaft fixing member 6 are inserted will be described with reference to FIG. FIG. 4 is a cross-sectional view schematically illustrating the internal space of the hosel portion 3. As illustrated in FIG. 4, the internal space of the hosel portion 3 according to the present embodiment includes, in order from the upper end portion 36 side, a first diameter portion 32, a second diameter portion 33, a third diameter portion 35, It consists of

  The first diameter portion 32 is formed in a cylindrical shape and is open to the upper end portion 36 side. The second diameter portion 33 is continuous with the first diameter portion 32 and is formed in a cylindrical shape having a slightly smaller diameter than the first diameter portion 32. A plurality of grooves corresponding to a plurality of protrusions 621 formed on the outer peripheral surface of the second cylindrical portion 62 of the shaft fixing member 6 to be described later are provided on the inner peripheral surface of the second diameter portion 33 (not shown). (Illustrated). In the present embodiment, the first diameter portion 32 and the second diameter portion 33 as described above form an attachment hole 31 that opens to the upper end portion 36 side.

  A cylindrical third diameter portion 35 is disposed on the lower end side of the second diameter portion 33, and a partition wall 341 is provided between the third diameter portion 35 and the second diameter portion 33. The partition wall 341 is provided with a circular opening 34 having a smaller diameter than the second diameter part 33 and the third diameter part 35, and the opening part 34 penetrates in the vertical direction. Therefore, the partition wall 341 is formed in an annular shape, and the second diameter portion 33 and the third diameter portion 35 communicate with each other through the opening portion 34. In addition, the 3rd diameter part 35 is opened to the lower end part 37 side. Thereby, the internal space of the hosel part 3 penetrates to the side part 14 side and the sole part 13 side of the head 1 substantially parallel to the axial direction of the shaft 2.

  When the golf club 100 is assembled, the shaft fixing member 6 (and the insert member 5) is inserted into the first diameter portion 32 and the second diameter portion 33 of the hosel portion 3 from the upper end portion 36 side. The engaging member 4 is disposed on the upper end side of the shaft fixing member 6 (and the insert member 5), and the outer diameter of the engaging member 4 is formed larger than the first diameter portion 32. Therefore, the shaft fixing member 6 (and the insert member 5) can be inserted downward in the axial direction until the lower end portion 44 of the engagement member 4 engages with the upper end (upper end portion 36) of the hosel portion 3. On the other hand, the washer 93 and the screw-shaped fixture 9 are inserted into the third diameter portion 35 from the lower end portion 37 side. The fixture 9 and the shaft fixing member 6 are fastened with screws. Thereby, the shaft 2 and the golf club head 1 are detachably fixed.

  As illustrated in FIG. 3, the fixture 9 is formed by a head 91 and a screw portion 92 connected to the head 91. The screw portion 92 is formed to have a smaller diameter than the diameter of the opening portion 34 so that the screw portion 92 can be inserted into the opening portion 34 and reach the second diameter portion 33 from the lower end portion 37 side. On the other hand, the outer diameter of the head 91 is formed larger than the diameter of the opening 34 so that the entire fixture 9 does not pass through the opening 34. The head 91 is formed with a rectangular recess into which a wrench is inserted (not shown). Therefore, the user can fix or remove the golf club head 1 and the shaft 2 by fitting and operating a wrench in the recess.

[Shaft fixing member]
Next, the shaft fixing member 6 according to the present embodiment will be described with reference to FIG. FIG. 5 is a front view schematically illustrating the shaft fixing member 6 according to this embodiment. As illustrated in FIG. 5, the shaft fixing member 6 according to the present embodiment has an upper end portion 65 and a lower end portion 66 at both ends in the axial direction (vertical direction in the drawing). And the shaft fixing member 6 is provided with the convex part 67, the 1st cylindrical part 61, and the 2nd cylindrical part 62 in order from the upper end part 65 side.

  The first cylindrical portion 61 is a portion inserted through the first diameter portion 32 of the hosel portion 3. The outer diameter of the first cylindrical portion 61 is larger than the inner diameter of the second diameter portion 33 of the hosel portion 3 and is formed so as to be inserted into the first diameter portion 32 of the hosel portion 3. Therefore, when the engagement member 4 to be described later is not taken into consideration, the shaft fixing member 6 has an end surface 611 on the lower end portion 66 side of the first cylindrical portion 61 between the first diameter portion 32 and the second diameter portion 33. It can be inserted into the internal space of the hosel portion 3 until it abuts against the stepped portion formed therebetween.

  The second cylindrical portion 62 disposed on the lower end side of the first cylindrical portion 61 is a portion that passes through the second diameter portion 33 of the hosel portion 3. Therefore, the outer diameter of the second cylindrical portion 62 is smaller than the outer diameter of the first cylindrical portion 61 and is formed so as to be inserted into the second diameter portion 33 of the hosel portion 3. A plurality of protrusions 621 extending in the axial direction are formed on the outer peripheral surface of the second cylindrical part 62, and the plurality of protrusions 621 are formed on the inner peripheral surface of the second diameter part 33 of the hosel part 3. It corresponds to the groove to be made.

  Therefore, when the shaft fixing member 6 is inserted into the mounting hole 31 of the hosel part 3 along the axial direction, the plurality of protrusions 621 formed on the second cylindrical part 62 of the shaft fixing member 6 and the first of the hosel part 3 A plurality of grooves formed in the two-diameter portion 33 are engaged. As a result, the shaft fixing member 6 and the hosel portion 3 are connected so as to be non-rotatable about the axis (circumferential direction). Note that the “connection” here may be at least in contact with each other so as not to move, and is not required until they do not separate even when an external force is applied. The same applies to “connection” used below.

  A cylindrical convex portion 67 that protrudes upward is formed on the upper end side of the first cylindrical portion 61. The outer diameter of the convex portion 67 is smaller than the outer diameter of the first cylindrical portion 61. And the external thread part for connecting with the recessed part 42 of the engaging member 4 mentioned later and the recessed part 54 of the insert member 5 is formed in the outer peripheral surface of the convex part 67. As shown in FIG.

  The shaft fixing member 6 has an outer shape extending in the vertical direction, and is a shaft recess that opens on the upper end 75 side in a region from the upper end of the projection 67 to the vicinity of the lower end of the first cylindrical portion 61. 63. The shaft recess 63 has a cylindrical inner peripheral surface extending along the vertical direction. The lower end 21 of the shaft body 20 is inserted into the shaft recess 63. And the shaft main body 20 is fixed to the recessed part 63 for shafts by fixing means, such as an adhesive agent. Thus, the shaft center S (see FIGS. 1 and 2) of the shaft 2 is fixed so as to extend along the direction in which the shaft recessed portion 63 extends (the vertical direction in FIG. 5). In addition, the adhesive agent which fixes the shaft main body 20 may not be specifically limited, According to embodiment, you may select suitably.

  Further, the shaft fixing member 6 is provided with a fixing tool recess 64 that opens to the lower end 66 side in a region where the second cylindrical portion 62 exists. The inner diameter of the fixing tool recess 64 corresponds to the outer diameter of the screw portion 92 of the fixing tool 9, and a male screw (not shown) formed on the outer peripheral surface of the screw portion 92 is screwed onto the inner peripheral surface thereof. A female screw (not shown) is formed. Therefore, after inserting the shaft fixing member 6 into the mounting hole 31 of the hosel part 3, the fixing tool 9 is inserted into the internal space from the lower end 37 side of the hosel part 3, and the screw part 92 of the fixing tool 9 is connected to the shaft fixing member. 6, the fixture 9 and the shaft fixing member 6 can be screwed together.

[Engagement member]
Next, the engaging member 4 according to the present embodiment will be described with reference to FIG. FIG. 6 is a front view schematically illustrating the engaging member 4 according to this embodiment. As illustrated in FIG. 6, the engaging member 4 according to the present embodiment is formed in a cylindrical shape so as to cover the outer peripheral surface of the shaft body 20, and the convex portion 67 of the shaft fixing member 6 or It attaches to the convex part 51 of the insert member 5 mentioned later.

  The engagement member 4 includes a cylindrical through hole 41 that is open on both the upper end 43 side and the lower end 44 side and penetrates in the vertical direction. The inner diameter of the region on the upper end portion 43 side of the through hole 41 is formed so that the shaft body 20 can be inserted. On the other hand, a cylindrical recess 42 having a larger inner diameter than the region on the upper end 43 side is formed on the lower end 44 side of the through hole 41.

  A convex portion 67 of the shaft fixing member 6 and a convex portion 51 of the insert member 5 described later are fitted into the concave portion 42. Therefore, the inner diameter of the concave portion 42 is formed such that both convex portions (51, 67) can be inserted. In addition, the internal peripheral surface of this recessed part 42 is formed with the internal thread part screwed together with the external thread part formed in each convex part (51, 67).

  On the other hand, the outer peripheral surface 45 of the engaging member 4 is formed in a taper shape whose outer diameter increases toward the lower end 44 side. The outer diameter of the outer peripheral surface 45 at the lower end of the engaging member 4 is formed larger than the inner diameter of the first diameter portion 32 of the hosel portion 3. Accordingly, the engaging member 4 is not fitted into the first diameter portion 32 of the hosel portion 3, and the end surface 441 on the lower end portion 44 side of the engaging member 4 is engaged with the upper end portion 36 (opening edge) of the hosel portion 3. To do.

  The engaging member 4 is inserted into the shaft body 20 in advance. That is, the engagement member 4 is inserted into the shaft body 20 before the shaft fixing member 6 is attached to the lower end portion 21 of the shaft body 20, and then the shaft fixing member 6 is attached to the lower end portion 21 of the shaft body 20 and fixed. To do. Therefore, unless the insert member 5 to be described later is taken into account, the engaging member 4 has the shaft main body 20 unless the female screw portion of the concave portion 42 and the male screw portion of the convex portion 67 of the shaft fixing member 6 are screwed together. It can move in the axial direction along.

[Insert material]
Next, the insert member 5 will be described with reference to FIGS. 7A and 7B. FIG. 7A is a front view schematically illustrating the insert member 5 in a cylindrical state. FIG. 7B is a perspective view schematically illustrating the insert member 5 in a divided state.

  The insert member 5 is disposed between the engaging member 4 and the shaft fixing member 6 when attached to the shaft main body 20, and has a longer axial length than the engaging member 4. Can be configured. However, the length of the insert member 5 in the axial direction may not be limited to such an example, and may be appropriately determined according to the embodiment. As illustrated in FIG. 7A, the insert member 5 is formed in a cylindrical shape so as to cover the outer peripheral surface of the shaft main body 20, and in order from the upper end portion 55 side, the convex portion 51, the main body portion 52, It has.

  The convex portion 51 is a portion that fits into the concave portion 42 of the engaging member 4 as described above, and is configured in the same manner as the convex portion 67 of the shaft fixing member 6. That is, the convex portion 51 is formed in a cylindrical shape, and a male screw portion that is screwed into the female screw portion of the concave portion 42 is formed on the outer peripheral surface of the convex portion 51.

  On the other hand, the main body portion 52 is a portion that passes through the first diameter portion 32 of the hosel portion 3 when the insert member 5 is attached to the shaft main body 20, and is similar to the first cylindrical portion 61 of the shaft fixing member 6. Composed. That is, the main body portion 52 is formed in a cylindrical shape, and the outer diameter of the main body portion 52 is substantially the same as the outer diameter of the first cylindrical portion 61 and is formed so as to be able to be inserted into the first diameter portion 32 of the hosel portion 3. ing.

  The main body portion 52 corresponds to a portion that extends a length for fixing the lower end portion 21 of the shaft main body 20 when the insert member 5 is disposed between the engagement member 4 and the shaft fixing member 6. Therefore, the axial length of the main body 52 corresponds to an increase in the axial length that restrains the lower end 21 of the shaft main body 20 when the insert member 5 is mounted.

  The insert member 5 is open on both the upper end 55 side and the lower end 56 side, and includes a columnar through-hole 53 penetrating in the vertical direction. Similar to the through hole 41 of the engaging member 4, the inner diameter of the region on the upper end 55 side of the through hole 53 is formed so that the shaft body 20 can be inserted. On the other hand, a cylindrical recess 54 having an inner diameter larger than the region on the upper end 55 side is formed on the lower end 56 side of the through hole 53.

  The recess 54 is configured in substantially the same manner as the recess 42 of the engagement member 4. When the insert member 5 is disposed between the engaging member 4 and the shaft fixing member 6, the convex portion 67 of the shaft fixing member 6 is fitted into the concave portion 54. Therefore, the inner diameter of the concave portion 54 is formed so that the convex portion 67 can be inserted, and a female screw portion that can be screwed with the male screw portion formed in the convex portion 67 is formed on the inner peripheral surface of the concave portion 54. ing.

  Therefore, the concave portion 54 (female screw portion) of the insert member 5 and the convex portion 67 (male screw portion) of the shaft fixing member 6 are screwed together, and the convex portion 51 (male screw portion) of the insert member 5 and the engaging member 4 are engaged. The recess 42 (female screw portion) can be screwed together. Thus, the insert member 5 can be disposed between the engaging member 4 and the shaft fixing member 6 and the insert member 5 can be attached to the shaft body 20.

  Here, the lower end 21 of the shaft body 20 is inserted and fixed in the shaft recess 63 of the shaft fixing member 6. That is, the shaft recess 63 of the shaft fixing member 6 restrains a region above the lower end 21. Further, the engaging member 4 restrains the shaft body 20 by covering the outer peripheral surface of the shaft body 20 with the through holes 41. Furthermore, the insert member 5 restrains the shaft body 20 by covering the outer peripheral surface of the shaft body 20 with the through holes 53.

  Therefore, when the engaging member 4 is attached to the convex portion 67 of the shaft fixing member 6, the shaft concave portion 63 of the shaft fixing member 6 and the axial length of the engaging member 4 are equal to the length of the shaft main body 20. The lower end 21 is constrained in the axial direction. On the other hand, when the insert member 5 is attached to the shaft body 20, the lower end portion 21 of the shaft body 20 is further restrained in the axial direction by the length of the insert member 5 in the axial direction. Therefore, in this embodiment, the length of the axial direction of the part which restrains the shaft main body 20 can be adjusted by attaching or detaching the insert member 5. That is, in the present embodiment, the engagement member 4, the insert member 5, and the shaft fixing member 6 constitute a first adjustment mechanism that can adjust the length in the axial direction that restrains the shaft 2.

  Moreover, this insert member 5 can be divided | segmented into two in the circumferential direction so that it may be illustrated by FIG. 7B. More specifically, the cylindrical insert member 5 is formed by combining two insert pieces 50 having a circular arc cross section. In addition, it can also comprise so that insert piece 50 may be fixed. For example, one insert piece 50 may be provided with a convex portion and the other insert piece 50 may be provided with a concave portion, and these may be engaged. Alternatively, a key groove may be provided in one insert piece 50 and a key may be provided in the other insert piece 50, and these may be engaged. The method for fixing both the insert pieces 50 may not be particularly limited, and may be appropriately selected according to the embodiment. A specific method for attaching and detaching the insert member 5 will be described later.

  Note that the materials of the engagement member 4, the insert member 5, and the shaft fixing member 6 may be appropriately selected according to the embodiment, and for example, metal, resin, FRP, or the like may be used. Further, the engaging member 4 may be configured to serve as a decorative member generally called a socket, a ferrule, a ferrule or the like.

§3 Shaft length extension mechanism (second adjusting mechanism)
Next, a mechanism for extending the length of the shaft 2 (second adjusting mechanism) according to the present embodiment will be described with reference to FIG. FIG. 8 is a cross-sectional view schematically illustrating the extending member 7 and the rear end portion of the shaft 2 according to this embodiment. As illustrated in FIG. 8, the grip end 231 of the shaft 2 is provided with a cylindrical recess 24. As illustrated in FIG. 8, the inner peripheral surface of the recess 24 may be covered with a coating member 240 made of resin, metal, or the like that is harder than the grip 23. A screw part may be formed.

  On the other hand, the extending member 7 includes a main body portion 71 and a convex portion 72 from the upper end side. The outer diameter of the main body 71 is approximately the same as the outer diameter of the grip 23 in the vicinity of the grip end 231 so that the outer shape of the shaft 2 and the extension member 7 is continuous when the extension member 7 is attached to the grip end 231 of the shaft 2. It is constituted similarly. Further, the convex portion 72 is formed in a columnar shape corresponding to the concave portion 24 of the shaft 2, and a male screw portion that is screwed into the female screw portion of the concave portion 24 is formed on the outer peripheral surface of the convex portion 72. In addition, the material of the extending member 7 may be appropriately selected according to the embodiment. For example, the extension member 7 may be formed of rubber, resin, or the like. Further, the outer peripheral surface of the convex portion 72 may be coated with a resin, metal, or the like that is harder than the material of the extension member 7, similarly to the concave portion 24.

  Therefore, in this embodiment, the extension member 7 is attached to the grip end 231 of the shaft 2 by screwing the convex portion 72 (male screw portion) of the extension member 7 into the recess 24 (female screw portion) of the shaft 2. Can do. As a result, the axial length of the shaft 2 is increased by the axial length of the extension member 7 (main body portion 71). Therefore, in this embodiment, the axial length of the shaft 2 can be adjusted by attaching and detaching the extension member 7. That is, in the present embodiment, the extension member 7 constitutes a second adjustment mechanism that can adjust the length of the shaft 2 in the axial direction. In the present embodiment, the shaft 2 and the extension member 7 are detachably configured by the male screw portion and the female screw portion. However, the attachment / detachment mechanism of the shaft 2 and the extension member 7 may not be limited to such an example, and may be appropriately selected according to the embodiment.

§4 Usage Method Next, the usage method of each adjusting mechanism configured as described above will be described with reference to FIG. In the first adjustment mechanism according to the present embodiment, the engaging member 4 is attached to the shaft fixing member 6 as it is, in other words, the first aspect in which the insert member 5 is not attached, the shaft fixing member 6 and the engaging member 4. The 2nd aspect which has arrange | positioned the insert member 5 between can be taken. Similarly, the second adjustment mechanism according to the present embodiment has the extension member 7 not attached to the grip end 231 of the shaft 2, in other words, the first aspect in which the extension member 7 is removed from the grip end 231 of the shaft 2. The second mode in which the extension member 7 is attached to the grip end 231 of the shaft 2 can be taken. FIG. 9 shows a comparative example of club lengths in the two modes of the first mode and the second mode in both adjustment mechanisms.

  In FIG. 9A, the first adjustment mechanism and the second adjustment mechanism both take the first mode. In this aspect, the engaging member 4 is fixed to the shaft fixing member 6. Here, the engaging member 4 is inserted through the shaft body 20, and the shaft fixing member 6 is fixed to the lower end portion 21 of the shaft body 20. Therefore, the engaging member 4 is moved along the shaft body 20, and the concave portion 42 of the engaging member 4 is screwed to the convex portion 67 of the shaft fixing member 6, so that the engaging member 4 is engaged with the shaft fixing member 6. Can be fixed. Moreover, in this aspect, when the extension member 7 is attached to the grip end 231 of the shaft 2, the extension member 7 is removed from the grip end 231 of the shaft 2.

  In this state, the lower end 21 side portion (length B1 + B2) constrained by the engaging member 4 and the shaft fixing member 6 does not bend when the user swings. Therefore, in the shaft 2, the range (length L1) from the upper end portion 43 (neck end surface) of the engaging member 4 to the grip end 231 of the shaft 2 is a range in which bending occurs during the user's swing, in other words, the shaft 2 This is a range related to the bending of. Specifically, the portion above the upper end portion 22 of the shaft body 20 and the portion gripped by the user are not bent. Therefore, when the user swings while gripping the grip 23 of the golf club 100, the range of the shaft 2 from the upper end portion 43 of the engaging portion 4 to the end of the range gripped by the user is bent.

  Next, the second mode illustrated in FIG. 9B will be described. In order to shift from the first mode to the second mode in the first adjustment mechanism, first, the engaging member 4 is removed from the shaft fixing member 6. Next, the engaging member 4 is moved along the shaft body 20 and separated from the shaft fixing member 6. Then, as illustrated in FIG. 9B, the insert member 5 is attached to the shaft body 20.

  Here, in order to attach the insert member 5 to the shaft main body 20, first, the insert member 5 is formed by combining the pair of insert pieces 50 on the outer periphery of the shaft main body 20 so as to be cylindrical. At this time, the position in the axial direction in which both the insert pieces 50 are arranged is between the shaft fixing member 6 and the engaging member 4. Next, the concave portion 54 (female screw portion) on the lower end portion 56 side of the insert member 5 is screwed into the convex portion 67 (male screw portion) of the shaft fixing member 6. Thereby, the insert member 5 and the shaft fixing member 6 are fixed. Finally, the concave portion 42 (female screw portion) of the engaging member 4 is screwed into the convex portion 51 (male screw portion) on the upper end portion 55 side of the insert member 5. Thereby, the first adjustment mechanism shifts to the second mode.

  In order to shift from the first mode to the second mode in the second adjustment mechanism, the extension member 7 is attached to the grip end 231 of the shaft 2. The extension member 7 is attached to the grip end 231 of the shaft 2 by screwing the convex portion 72 (male screw portion) of the extension member 7 into the recess 24 (internal thread portion) provided in the grip end 231 of the shaft 2. Can do.

  In this state, the depth at which the shaft 2 (shaft body 20) is inserted into the hosel portion 3 is increased by the amount of the insert member 5 (length D) attached. Therefore, the length L2 from the upper end portion 43 of the engaging member 4 to the grip end 231 of the shaft 2 is shorter by D than the length L1 of the first mode. That is, when the insert member 5 is attached, the club length is shortened by the length D of the insert member 5.

  Therefore, in this embodiment, the extension member 7 is attached to the grip end 231 of the shaft 2 to extend the axial length of the shaft 2. Specifically, by making the length A and the length D the same so that the axial length A of the extension member 7 corresponds to the axial length D of the insert member 5, the engaging member 4. The length from the upper end portion 43 to the end on the grip end 231 side of the shaft 2 can be kept constant in the first mode and the second mode. If the length from the upper end 43 of the engaging member 4 to the end of the shaft 2 on the grip end 231 side is the same, the neck length and the size of the head 1 are the same in the first mode and the second mode. So the club head is the same. Therefore, according to this embodiment, the club length can be kept constant by using the extension member 7 having a length corresponding to the length of the insert member 5.

  Further, in this state, the portion (B1 + B2 + D) on the distal end portion 21 side that is restrained by the engaging member 4, the insert member 5, and the shaft fixing member 6 does not bend during the swing of the user. That is, in the tip portion of the shaft 2, the portion that does not bend at the time of the user's swing is increased by the length D in the axial direction of the insert member 5 compared to the first mode. However, the length A of the extension member 7 attached to the grip end 231 of the shaft 2 is the same as the length D of the insert member 5. Therefore, if it is assumed that the user grips the same range from the rear end side of the shaft 2, the length of the portion related to the bending of the shaft 2 is constant in the first mode and the second mode. .

  However, even if the length of the portion related to the bending of the shaft 2 is kept constant, the ease of bending of the shaft 2 changes for the following reason. That is, the shaft 2 is formed such that the bending rigidity changes from the front end portion to the rear end portion depending on the configuration method. Generally, the shaft body 20 is configured such that the lower end 21 side is more easily bent than the upper end 22 side. Then, as illustrated in FIG. 9, when compared between the first mode and the second mode, the length of the portion involved in the bending of the shaft 2 is kept constant. The portion involved in the bending of the lens shifts along the axial direction. Therefore, even if the length of the portion related to the bending of the shaft 2 does not change, the bending rigidity is different between the front end portion side and the rear end portion side of the shaft 2, and thus the ease of bending of the shaft 2 changes. Therefore, according to the present embodiment, the ease of bending of the shaft 2 can be changed by changing the length of the restriction range at the tip of the shaft 2. Specifically, the golf club 100 according to the second aspect is less likely to bend than the first aspect because the restraint range at the tip of the shaft 2 is longer.

  Furthermore, in the second mode, compared with the first mode, the portion that does not bend at the time of swing is increased, but the neck length from the upper end portion 36 of the hosel portion 3 to the upper end portion of the engaging member 4 is increased. (B1) has not changed. Therefore, according to this embodiment, the ease of bending of the shaft 2 can be changed without changing the neck length.

  As described above, according to the present embodiment, the ease of bending of the shaft 2 can be changed without changing the neck length and the club length. Therefore, the ease of bending of the shaft 2 can be changed without causing the user to feel uncomfortable due to changes in the neck length and club length. In addition, the insert member 5 may prepare not only one type but a plurality of types having different lengths in the axial direction. In response to this, the extension member 7 may be prepared in a plurality of types having different lengths in the axial direction. Thereby, the ease of bending of the shaft 2 can be changed stepwise.

  Even when the first mode in which the length inserted into the internal space of the hosel part 3 is relatively short is selected, the second cylindrical part 62 of the shaft fixing member 6 is the second part of the hosel part 3. It is configured to reach the diameter portion 33. Therefore, even in this case, the plurality of protrusions 621 formed on the second cylindrical portion 62 of the shaft fixing member 6 are engaged with the plurality of grooves formed on the second diameter portion 33 of the hosel portion 3. Thus, the shaft fixing member 6 can be connected to the hosel portion 3 so as not to rotate about the axis. In this case, the screw portion 92 of the fixture 9 inserted from the lower end portion 37 side is configured to be screwed into the female screw portion of the fixture recess 64 of the shaft fixing member 6. Therefore, the shaft 2 and the head 1 can be appropriately fixed.

  Even when the second mode in which the length inserted into the internal space of the hosel portion 3 is relatively long is selected, the lower end portion 66 of the shaft fixing member 6 is the second diameter portion of the hosel portion 3. It is comprised so that the lower end of 33 may not be reached. In this case, the end surface 611 between the first cylindrical portion 61 and the second cylindrical portion 62 of the shaft fixing member 6 is a stepped portion between the first diameter portion 32 and the second diameter portion 33 of the hosel portion 3. Configured to not reach. Therefore, even when the second mode in which the length inserted into the internal space of the hosel portion 3 is relatively long is selected, the portion below the lower end portion 44 (end surface 441) of the engagement member 4 is All are accommodated in the internal space of the hosel part 3.

§5 Modifications While the embodiment of the present invention has been described above, the above description is only an example of the present invention in all respects. It goes without saying that various improvements and modifications can be made without departing from the scope of the present invention. For example, with respect to each component of the golf club 100, omission, replacement, and addition of components may be appropriately performed according to the embodiment. In addition, the shape and size of each component of the golf club 100 may be appropriately set according to the embodiment. For example, the following changes can be made. For convenience of explanation, the same reference numerals as those in the above embodiment are used for the components that are configured in the same manner as in the above embodiment with respect to each of the components in the modification described below. The contents similar to those in the above embodiment are omitted as appropriate.

<5.1>
For example, in the above-described embodiment, the first adjustment mechanism has an axial length that restrains the shaft 2 in an aspect that uses the insert member 5 (second aspect) and an aspect that does not use the first member (first aspect). Adjusted. However, the adjustment method of the first adjustment mechanism may not be limited to such an example. For example, by using a plurality of insert members 5 having different lengths in the axial direction, an axial direction that restrains the shaft 2 is used. The length may be adjusted. Hereinafter, an example in which two insert members (5A, 5B) are used will be described with reference to FIG. However, the number of insert members 5 is not limited to two, and may be three or more. Both the insert members (5A, 5B) are configured in the same manner as the insert member 5 of the above embodiment except that the length of the main body portion 52 in the axial direction is different.

  FIG. 10 shows a comparative example of club lengths in two modes according to this modification. In this case, the first adjustment mechanism according to the present modification includes the first aspect in which the insert member 5A (length D1) having a relatively short axial length is attached, and the relatively long axial length. It can take with the 2nd mode which attached long insert member 5B (length D2).

  In FIG. 10A, both the first adjustment mechanism and the second adjustment mechanism are in the first mode. In order for the first adjustment mechanism to take the first mode, the insert member 5A having a relatively short axial length may be attached to the shaft body 20 by the above-described attachment method. In this state, in the shaft 2, the range (length L <b> 3) from the upper end portion 43 of the engaging member 4 to the grip end 231 of the shaft 2 is a range that causes the deflection when the user swings, in other words, the deflection of the shaft 2. To be involved in

  On the other hand, in FIG.10 (b), both the 1st adjustment mechanism and the 2nd adjustment mechanism have taken the 2nd aspect. In order to shift from the first mode to the second mode in the first adjusting mechanism, the insert member 5A having a relatively short axial length is removed from the shaft 2, and the relatively long axial length is removed. The insert member 5B may be attached to the shaft body 20. In this state, the length L4 of the portion of the shaft 2 from the upper end portion 43 of the engaging member 4 to the grip end 231 of the shaft 2 is larger than the length L3 in the first aspect in the axial direction of the insert member 5A. The length D1 of the insert member 5B is shortened by a difference D3 between the axial length D2 of the insert member 5B. On the other hand, by attaching the extension member 7 to the grip end 231 of the shaft 2, the axial length of the shaft 2 is increased by the length A of the extension member 7 in the axial direction. Therefore, in the present embodiment, the length A and the difference D3 are the same so that the axial length A of the extension member 7 corresponds to the axial length difference D3 of both insert members (5A, 5B). By doing so, the club length can be kept constant in the first mode and the second mode.

  Here, since the length of the extension member 7 and the difference D3 between the both insert members (5A, 5B) are the same, the lengths of the portions involved in bending are the same in the first mode and the second mode. is there. However, in the golf club 100 according to the second aspect, the length of the restraint portion at the lower end 21 of the shaft body 20 is increased by D3 based on the same principle as in the above embodiment, so that the golf club 100 according to the second aspect is longer than the first aspect. It is difficult to bend. Note that the neck length is kept constant in the first mode and the second mode based on the same principle as in the above embodiment.

<5.2>
Further, for example, in the above-described embodiment, the length of the shaft 2 in the axial direction of the second adjustment mechanism is different depending on whether the extension member 7 is used (second mode) or not (first mode). Adjusted. However, the adjustment method of the second adjustment mechanism may not be limited to such an example. For example, by using a plurality of extension members 7 having different axial lengths, the axial length of the shaft 2 is used. May be adjusted. Hereinafter, an example in which two extending members (7A, 7B) are used will be described with reference to FIGS. However, the number of the extending members 7 is not limited to two, and may be three or more. Both extension members (7A, 7B) are configured in the same manner as the extension member 7 according to the above-described embodiment except that the length of the main body 71 in the axial direction is different.

  Here, regardless of the adjustment method of the second adjustment mechanism, as the adjustment method of the first adjustment mechanism, any of the method of the above embodiment and the method of the above modification <5.1> may be adopted. FIG. 11 shows an example in which the first adjustment mechanism adopts the same method as in the above embodiment. On the other hand, FIG. 12 shows an example in which the first adjustment mechanism adopts the method of the above-described modification <5.1>.

  First, an example will be described in which the first adjustment mechanism adopts the same method as in the above embodiment. FIG. 11 shows a comparative example of club lengths in two modes according to this modification. In this case, the second adjustment mechanism according to the present modification includes the first aspect in which the extension member 7A (length A1) having a relatively short axial length is attached, and the relatively long axial length. It can take the 2nd mode which attached long extension member 7B (length A2).

  In FIG. 11A, both the first adjustment mechanism and the second adjustment mechanism are in the first mode. In order for the second adjustment mechanism to take the first mode, the extension member 7A having a relatively short axial length may be attached to the grip end 231 of the shaft 2 by the above-described attachment method. In this state, the length from the upper end portion 43 of the engaging member 4 to the end of the shaft 2 on the grip end 231 side is (L1 + A1). In addition, the range which brings about bending at the time of a user's swing is the range (length L1) from the upper end part 43 of the engaging member 4 to the grip end 231 of the shaft 2 like the said embodiment.

  On the other hand, in FIG.11 (b), both the 1st adjustment mechanism and the 2nd adjustment mechanism have taken the 2nd aspect. In order to shift from the first mode to the second mode in the second adjusting mechanism, the extension member 7A having a relatively short axial length is removed from the grip end 231 of the shaft 2, and the relatively axial direction is removed. The extending member 7B having a long length may be attached to the grip end 231 of the shaft 2. In this state, in the shaft 2, the length L2 of the portion from the upper end portion 43 of the engaging member 4 to the grip end 231 of the shaft 2 is larger than the length L1 in the first aspect in the axial direction of the insert member 5. Is shortened by the length D. On the other hand, when the extension member 7 having a relatively long axial length is attached to the grip end 231 of the shaft 2, the axial length of the shaft 2 is larger than that of the first embodiment. The length is increased by the difference A3 between the length A1 and the length A2 of the extending member 7B. Therefore, in this embodiment, the difference A3 and the length D are the same so that the difference A3 in the axial length of both extension members (7A, 7B) corresponds to the axial length D of the insert member 5. By doing so, the club length can be kept constant in the first mode and the second mode.

  Further, since the length D of the insert member 5 and the difference A3 between the two extending members (7A, 7B) are the same, the lengths of the portions involved in the bending are the same in the first mode and the second mode. It is. However, the golf club 100 according to the second aspect is based on the same principle as in the above embodiment, and the length of the restraint portion at the lower end 21 of the shaft body 20 is increased by D, so that it is compared with the first aspect. It is difficult to bend. In this modified example, the neck length is kept constant in the first mode and the second mode based on the same principle as in the above embodiment.

  Next, an example will be described in which the first adjustment mechanism adopts the same method as that of the modified example <5.1>. FIG. 12 shows a comparative example of club lengths in two modes according to this modification.

  In FIG. 12A, both the first adjustment mechanism and the second adjustment mechanism are in the first mode. In this state, the length from the upper end 43 of the engaging member 4 to the end of the shaft 2 on the grip end 231 side is (L3 + A1). It should be noted that the range that causes the bending at the time of the user's swing is the grip from the portion (length L3) from the upper end 43 of the engaging member 4 to the grip end 231 of the shaft 2 as in the modification <5.1>. This is a range excluding 23.

  On the other hand, in FIG.12 (b), both the 1st adjustment mechanism and the 2nd adjustment mechanism have taken the 2nd aspect. In this state, the length L4 of the portion of the shaft 2 from the upper end portion 43 of the engaging member 4 to the grip end 231 of the shaft 2 is larger than the length L3 in the first aspect in the axial direction of the insert member 5A. The length D1 of the insert member 5B is shortened by a difference D3 between the axial length D2 of the insert member 5B. On the other hand, when the extension member 7 having a relatively long axial length is attached to the grip end 231 of the shaft 2, the axial length of the shaft 2 is longer than that of the first embodiment. The length A1 is increased by a difference A3 between the length A2 and the length A2 of the extending member 7B. Therefore, in this embodiment, the difference A3 is such that the difference A3 in the axial length of both extension members (7A, 7B) corresponds to the difference D3 in the axial length of both insert members (5A, 5B). By making the difference D3 the same, the club length can be kept constant in the first mode and the second mode.

  In addition, since the difference D3 between the two insert members (5A, 5B) and the difference A3 between the two extension members (7A, 7B) are the same, the portion involved in bending in the first mode and the second mode. The length is the same. However, in the golf club 100 according to the second aspect, the length of the restraint portion at the lower end 21 of the shaft body 20 is increased by D3 based on the same principle as in the above embodiment, so that the golf club 100 according to the second aspect is longer than the first aspect. It is difficult to bend. In this modified example, the neck length is also kept constant in the first mode and the second mode based on the same principle as in the above embodiment.

<5.3>
Further, for example, in the above embodiment, the engaging member 4, the insert member 5, and the shaft fixing member 6 are fixed by screws, but the relationship between the male screw (convex portion) and the female screw (concave portion) is opposite. There may be. For example, FIGS. 13, 14 </ b> A, and 14 </ b> B show an example in which the convex portion and the concave portion are interchanged between the insert member 5 and the shaft fixing member 6.

  FIG. 13 illustrates a shaft fixing member 6A according to this modification. 14A and 14B illustrate an insert member 5C according to this modification. As illustrated in FIG. 13, in the shaft fixing member 6 </ b> A according to this modification, a recess 631 having an inner diameter larger than that of the region 632 on the lower end side is formed on the upper end side of the shaft recess 63. A female screw portion is formed on the inner peripheral surface of the recess 631.

  On the other hand, as illustrated in FIGS. 14A and 14B, in the insert member 5 </ b> C according to this modification, a convex portion 57 that protrudes downward in the axial direction is formed on the lower end portion 56 side. The outer diameter of the convex portion 57 is formed to correspond to the inner diameter of the concave portion 631, and a male screw portion that is screwed into the female screw portion formed in the concave portion 631 is formed on the outer peripheral surface of the convex portion 57. . Thereby, the insert member 5C can be attached to the shaft fixing member 6A by screwing the convex portion 57 (male screw portion) of the insert member 5C into the concave portion 631 (female screw portion) of the shaft fixing member 6A. Such replacement of the convex portion and the concave portion may be performed between the members.

<5.4>
For example, in the said embodiment, although the engaging member 4, the insert member 5, and the shaft fixing member 6 are being fixed with the screw, fixation other than a screw is also possible. The method of fixing each member may be appropriately selected according to the embodiment as long as it is a method of detachably fixing. For example, as illustrated in FIG. 15, a snap-type attachment mechanism may be provided.

  FIG. 15 shows an example in which a snap-type attachment mechanism is used between the insert member 5 </ b> D and the shaft fixing member 6. In FIG. 16, an annular protrusion 58 that sandwiches the convex portion 67 of the shaft fixing member 6 from the radially outer side is provided at the lower end portion of the insert member 5D. On the inner peripheral surface of the protrusion 58, a retaining piece 581 for retaining the engagement with the convex portion 67 of the shaft fixing member 6 is provided. The projecting piece 501 is made of an elastically deformable material. Thereby, the insert member 5D can be fixed regardless of screwing. This mechanism may be used for fixing the engaging member and the insert member.

<5.5>
Further, for example, in the above embodiment, the extension member 7 is integrally formed. However, the structure of the extension member 7 may not be limited to such an example, and may be appropriately selected according to the embodiment. For example, as illustrated in FIG. 16, the extension member 7 may be formed by combining different members.

  FIG. 16 illustrates an extension member 7C according to this modification. As illustrated in FIG. 16, the main body portion 71 </ b> C and the convex portion 72 </ b> C of the extension member 7 </ b> C may be composed of different members. Here, for example, the main body 71C may be made of a relatively soft material such as rubber or resin. The convex portion 72C may be made of a material that is relatively harder than the main body portion 71C, such as metal or resin. Note that an insertion hole 711 for inserting a wrench such as a hexagon wrench is provided in the main body 71C of the extension member 7C illustrated in FIG. When attaching the extension member 7C to the shaft 2, first, the user inserts a wrench into the insertion hole 711 and inserts it into a polygonal recess (not shown) such as a hexagon provided at the upper end of the projection 72C. Insert a wrench. The user can attach the extension member 7C to the shaft 2 by operating the wrench.

<5.6>
Further, for example, in the above embodiment, the grip end of the shaft 2 is engaged by screwing the convex portion 72 (male screw portion) of the extension member 7 into the concave portion 24 (female screw portion) provided in the grip end 231 of the shaft 2. The extension member 7 is attached to 231. However, the structure for attaching the extension member 7 to the shaft 2 may not be limited to such an example, and may be appropriately selected according to the embodiment. Below, two modifications which attach the extension member 7 to the shaft 2 are shown.

  First, an example in which the extension member 7D is attached to the shaft 2A using the fixture 26 will be described with reference to FIGS. 17A and 17B. FIG. 17A illustrates the rear end portion of the shaft 2A in a state where the extension member 7D is not attached. FIG. 17B illustrates the rear end of the shaft 2A in a state where the extension member 7D is attached.

  In the shaft 2A exemplified in FIGS. 17A and 17B, the fitting member 25 is fitted to the upper end portion 22 of the shaft body 20. The fitting member 25 has a through hole 251 penetrating in the vertical direction, and a female screw that is screwed into a screw portion 262 (male screw portion) of the fixture 26 described later on the inner peripheral surface of the through hole 251. The part is formed. In addition, this fitting member 25 is formed with a metal, resin, etc., for example.

  The grip 23 covers the upper end portion 22 of the shaft body 20 together with the fitting member 25. The grip end 231 of the grip 23 is provided with a recess 24A corresponding to the shape of the head 261 of the fixture 26 described later. The recess 24 is connected to a through hole 241 penetrating in the vertical direction. Therefore, the grip end 231 communicates with the hollow portion of the grip 23 via the recess 24 and the through hole 241.

  On the other hand, the fixture 26 includes a columnar head portion 261 and a columnar screw portion 262 having a smaller diameter than the head portion 261. On the outer peripheral surface of the screw portion 262, a male screw portion that is screwed into the female screw portion formed on the inner peripheral surface of the through hole 251 of the fitting member 25 is formed. Therefore, in a state where the extension member 7D is not attached, the fixing tool 26 is inserted into the through hole 241 until the head 261 of the fixing tool 26 is fitted into the recess 24A of the grip end 231, and the screw portion 262 of the fixing tool 26 is inserted. It can be screwed into the through hole 251 of the fitting member 25. Thereby, the fixture 26 can be attached to the grip end 231 as illustrated in FIG. 17A.

  The extension member 7D is provided with a through-hole penetrating in the vertical direction over the main body portion 71D and the convex portion 72D. The through hole has a large diameter portion 712 having the same diameter as the concave portion 24A of the shaft 2 and a small diameter portion 713 having the same diameter as the through hole 241 of the concave portion 24A. The convex portion 72 </ b> D is formed to have the same diameter as the head portion 261 of the fixture 26. Therefore, the convex portion 72D of the extending member 7D can be inserted into the concave portion 24A of the grip end 231. The screw portion 262 of the fixture 26 is inserted into the small diameter portion 713 of the extension member 7D until the head portion 261 of the fixture 26 is fitted into the large diameter portion 712 of the extension member 7D, and the screw portion 262 of the fixture 26 is inserted. It can be screwed into the through hole 251 of the fitting member 25. Thereby, the extension member 7D can be attached to the shaft 2 as illustrated in FIG. 17B.

  Note that, as illustrated in FIGS. 17A and 17B, in this modification, the screw portion 262 of the fixture 26 is the cylindrical hollow portion 201 of the shaft body 20 regardless of whether or not the extension member 7D is attached. Is configured to reach. Accordingly, it is possible to appropriately ensure a length in which the screw portion 262 (male screw portion) of the fixture 26 and the female screw portion of the fitting member 25 are screwed together.

  Next, an example in which the grip end 231B is formed in a convex shape and the lower end portion of the extending member 7E is formed in a concave shape is shown using FIG. 18A. FIG. 18A illustrates the rear end portion of the shaft 2B according to this modification. In the shaft 2B illustrated in FIG. 18A, the hollow portion 201 of the shaft body 20 is open to the grip end 231B side. An annular outer wall portion 232 that surrounds the hollow portion 201 from the outside in the radial direction is provided in a predetermined region from the grip end 231B. The outer diameter of the outer wall portion 232 is smaller than the outer diameter of the other region of the grip 23B so as to correspond to an outer ring portion 73 of the extension member 7E described later. An external thread portion may be formed on the outer peripheral surface of the outer wall portion 232.

  On the other hand, an annular outer ring portion 73 extending along the axial direction and an annular inner ring portion 74 disposed inside the outer ring portion 73 are provided on the lower end side of the extending member 7E. ing. The inner diameter of the inner peripheral surface 731 of the outer ring portion 73 is formed to match the outer diameter of the outer wall portion 232 so that the outer ring portion 73 can be fitted to the outer wall portion 232 of the shaft 2B from the outside in the radial direction. Further, the inner ring portion 74 is longer in the axial direction than the outer ring portion 73, and can be inserted into the hollow portion 201 of the shaft 2B. As illustrated in FIG. 18A, the inner ring portion 74 may be formed of a member that is different from the member that forms the main body portion 71E. In this case, the inner ring portion 74 is made of a material harder than the material of the main body portion 71E. For example, the inner ring portion 74 is formed of metal, resin, or the like.

  Therefore, by inserting the inner ring portion 74 of the extension member 7E into the hollow portion 201 of the shaft 2 and fitting the outer ring portion 73 of the extension member 7E into the outer wall portion 232 formed in the grip end 231B, the extension member 7E is inserted into the shaft. 2 can be attached. Specifically, the extension member 7E is attached to the shaft 2 in a state where the outer wall portion 232 of the shaft 2B is sandwiched between the inner ring portion 74 and the outer ring portion 73 of the extension member 7E.

  Thereby, in this modification, the following effects can be acquired. That is, in the above embodiment, as illustrated in FIG. 8, when the extension member 7 and the shaft 2 are attached, the width of the step formed between the main body portion 71 and the convex portion 72 (left-right direction). A groove having a depth corresponding to the length of the extension member 7 and the shaft 2 may be formed. On the other hand, in this modification, the depth of the groove formed at the boundary between the extension member 7E and the shaft 2B is the width of the step formed between the other region of the grip 23 and the outer wall portion 232 (the length in the left-right direction). Only). Therefore, in this modification, the depth of the groove that can be formed at the boundary between the extension member 7E and the shaft 2B can be reduced, and the appearance of the portion to which the extension member 7E is attached can be improved.

  Here, when the shaft 2B is configured in this way, the outer wall portion 232 protrudes upward on the grip end 231B side of the shaft 2B. Therefore, such an attachment mechanism is used in the above example <5.2> for selectively attaching one of a plurality of extension members 7E having different axial lengths to the grip end 231B of the shaft 2B. Is preferred.

  The extension member 7E may be configured to be detachable from the shaft 2B, and a mechanism for fixing the extension member 7E to the shaft 2B may be appropriately selected according to the embodiment. For example, a male screw part may be formed on the outer wall part 232 of the shaft 2B, and a female screw part screwed into the male screw part may be formed on the inner peripheral surface 731 of the outer ring part 73 of the extension member 7E. Thereby, the extension member 7E can be fixed to the shaft 2B by screwing the outer wall portion 232 of the shaft 2B and the outer ring portion 73 of the extension member 7E. Similarly, a male screw portion may be formed on the outer peripheral surface of the inner ring portion 74 of the extension member 7E, and a female screw portion may be formed on the inner peripheral surface of the shaft body 20 on the grip end 231B side.

  Moreover, as illustrated in FIG. 18B, the members constituting the inner ring portion 74 of the extension member 7E may penetrate the extension member 7E in the vertical direction. FIG. 18B illustrates an extension member 7E according to this modification. As described above, the inner ring portion 74 is formed of a material harder than the material of the main body portion 71E. Therefore, the extension member 7E can be made difficult to deform by passing the inner ring portion 74 in the vertical direction in this way.

<5.7>
Further, for example, in the above embodiment, the insert member 5 is configured to be divided into two in the circumferential direction. However, the number of insert members 5 that can be divided is not limited to two, and may be three or more. In any case, when the insert member 5 is configured to be separable as described above, the insert member 5 can be assembled from the radial direction without covering the shaft main body 20 to cover the outer peripheral surface of the shaft main body 20. it can.

<5.8>
Further, for example, in the above embodiment, the engagement member 4 is formed in an annular shape. However, the configuration of the engaging member 4 is not limited to such an example, and may be configured to be separable like the insert member 5, for example.

<5.9>
Further, for example, in the above embodiment, the extension member 7 is formed by one member. However, the number of members constituting the extension member may not be limited to one, and one extension member may be formed by a plurality of members. For example, by configuring the extension members 7 according to the above embodiment to be connectable, the extension member 7 can be handled as one member, and one extension member can be formed by a plurality of members.

  In addition, the structure which connects the extension members 7 can be suitably selected according to embodiment. For example, by providing a recess similar to the recess 24 formed in the grip end 231 of the shaft 2 at the upper end of the extension member 7, a plurality of extension members 7 can be connected. Thereby, one extension member may be formed by a plurality of members.

<5.10>
Further, for example, in the above-described embodiment, the shaft recess 63 is formed so as to extend along the axis of the shaft fixing member 6 (vertical direction in FIG. 5). However, the shape of the recess 63 for the shaft may not be limited to such an example, and may be appropriately designed according to the embodiment. For example, the shaft recess 63 may be formed so as to extend obliquely from the axis of the shaft fixing member 6. Thereby, the shaft center S (see FIGS. 1 and 2) of the shaft main body 20 can be fixed so as to extend obliquely from the axis of the shaft fixing member 6.

<5.11>
For example, the golf club head 1 according to the above embodiment has a hollow structure. Therefore, this golf club head 1 may be manufactured by joining two or more members. That is, the golf club head 1 may be manufactured by joining a head body in which one or more openings leading to the hollow portion are formed and another member that closes the openings. For example, the head 1 can be configured by configuring the crown portion 12 and the face portion 11 as separate members and combining them with the head body. Moreover, the head 1 can also be configured by forming a head body having an opening in the sole portion 13 or the side portion 14 and closing the opening with another member. Such a head body can be manufactured by casting such as a known lost wax precision casting method.

DESCRIPTION OF SYMBOLS 1 ... Golf club head, 100 ... Golf club 11 ... Face part, 12 ... Crown part, 13 ... Sole part, 14 ... Side part,
2 ... shaft,
20 ... Shaft body, 201 ... Hollow part, 21 ... Lower end part (tip part), 22 ... Upper end part,
23 ... Grip, 231 ... Grip end (rear end), 232 ... Outer wall,
24 ... concave portion, 241 ... through hole, 25 ... fitting member, 251 ... through hole,
26 ... Fixing tool, 261 ... Head, 262 ... Screw part,
3… Hosel part,
31 ... Insertion hole (opening), 32 ... 1st diameter part, 33 ... 2nd diameter part, 34 ... Opening part, 341 ... Partition wall,
35 ... 3rd diameter part, 36 ... Upper end part, 37 ... Lower end part,
4 ... engaging member,
41 ... Through-hole, 42 ... Recess, 43 ... Upper end, 44 ... Lower end, 45 ... Outer peripheral surface,
441 ... the end face,
5 ... Insert member, 50 ... Insert piece,
51 ... convex part, 52 ... main body part, 53 ... through hole, 54 ... concave part, 55 ... upper end part, 56 ... lower end part,
57 ... convex part,
6 ... Shaft fixing member,
61 ... 1st cylindrical part, 611 ... End face,
62 ... 2nd cylindrical part, 621 ... ridge,
63 ... Recess for shaft, 631 ... First diameter part, 632 ... Second diameter part,
64: concave portion for fixture, 65 ... upper end portion, 66 ... lower end portion, 67 ... convex portion,
7 ... Extension member, 71 ... Body part, 711 ... Insertion hole, 712 ... Large diameter part, 713 ... Small diameter part,
72 ... convex part, 73 ... outer ring part, 731 ... inner peripheral surface, 74 ... inner ring part,
8 ... insert member, 81 ... slit,
9 ... Fixing device, 91 ... Head, 92 ... Screw part, 93 ... Washer

Claims (7)

A shaft having a front end and a rear end;
A golf club head having a hosel portion including an opening for attaching the shaft;
A shaft fixing member that is disposed in the internal space of the hosel part and to which a tip end part of the shaft is fixed; a cylindrical engagement member configured to be engageable with an opening of the hosel part; and covering an outer peripheral surface of the shaft; And an axial length that includes an insert member that can be disposed between the shaft fixing member and the engagement member, and that restrains the shaft based on the insert member. A first adjustment mechanism configured to be adjustable,
The shaft is provided continuously with the rear end portion of the shaft, and includes an extension member that can be attached to and detached from the rear end portion of the shaft, and is configured to be capable of adjusting the axial length of the shaft based on the extension member. Two adjustment mechanisms;
With
The second adjustment mechanism is configured to be able to increase or decrease the axial length of the shaft by an amount corresponding to an increase or decrease in the axial length that restrains the tip of the shaft by the first adjustment mechanism.
Golf club. The axial length of the extension member is configured to correspond to the axial length of the insert member,
The first adjustment mechanism includes a first aspect in which the engagement member is attached to the shaft fixing member, and a second aspect in which the insert member is disposed between the shaft fixing member and the engagement member. And is configured to take
The second adjustment mechanism can take a first mode in which the extension member is removed from the rear end portion of the shaft and a second mode in which the extension member is attached to the rear end portion of the shaft. It is configured,
The golf club according to claim 1. The second adjustment mechanism includes a plurality of the extending members having different axial lengths,
The difference in the axial length of the plurality of extension members is configured to correspond to the axial length of the insert member,
The first adjustment mechanism includes a first aspect in which the engagement member is attached to the shaft fixing member, and a second aspect in which the insert member is disposed between the shaft fixing member and the engagement member. And is configured to take
The second adjustment mechanism is configured to be capable of adjusting the axial length of the shaft by selectively attaching one of the plurality of extending members to the rear end portion of the shaft.
The golf club according to claim 1. The first adjustment mechanism includes a plurality of the insert members having different axial lengths,
The length of the extension member in the axial direction is configured to correspond to a difference in length in the axial direction of the plurality of insert members,
The first adjusting mechanism selectively disposes one of the plurality of insert members between the shaft fixing member and the engaging member, thereby increasing an axial length for restraining the shaft. Configured to be adjustable,
The second adjustment mechanism can take a first mode in which the extension member is removed from the rear end portion of the shaft and a second mode in which the extension member is attached to the rear end portion of the shaft. It is configured,
The golf club according to claim 1. The first adjustment mechanism includes a plurality of the insert members having different axial lengths,
The second adjustment mechanism includes a plurality of the extending members having different axial lengths,
The difference in the axial length of the plurality of extension members is configured to correspond to the difference in the axial length of the plurality of insert members,
The first adjusting mechanism selectively arranges one of the plurality of insert members between the shaft fixing member and the engaging member, thereby adjusting an axial length of restraining the shaft. Configured and possible
The second adjustment mechanism is configured to be capable of adjusting the axial length of the shaft by selectively attaching one of the plurality of extending members to the rear end portion of the shaft.
The golf club according to claim 1. The rear end of the shaft is provided with a recess that opens to the rear end,
One end portion of the extension member is provided with a convex portion that can be fitted into the concave portion.
The golf club according to claim 1. The shaft has a hollow portion that opens to the rear end side,
The rear end portion of the shaft is provided with an annular outer wall portion that surrounds the hollow portion from the outside in the radial direction,
At one end of the extension member, an outer ring part formed so as to be fitted to the outer wall part from the radially outer side, and a radially inner side of the outer ring part, and inserted into the hollow part of the shaft An inner ring part that can be provided,
The golf club according to claim 3 or 5.