JP2012016560A - Weight for golf club - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a weight for a golf club which is capable of adding comparatively heavy weight, capable of being easily and certainly installed to a shaft of the golf club such as a putter, and does not impair outward appearance of the golf club.SOLUTION: This weight W1 for the golf club includes a weight body, a first fixing means, and a second fixing means. The weight body has a rod shape, and can be inserted into the shaft of the golf club. The first fixing means is provided in one end of the weight body, and has a press face pressing the inner face of the shaft, for fixing the one end side of the weight body to the shaft. The second fixing means is provided in the other end of the weight body, and has a press face pressing the inner face of the shaft, for fixing the other end side of the weight body to the shaft.

Description

  The present invention relates to a golf club, and more particularly to a weight attached to a shaft of a putter.

  Usually, golf clubs manufactured by manufacturers, especially putters, are set to only a few types of weights that are judged to be most appropriate based on their own research and development. Therefore, it can never be said that the putter provided by the manufacturer meets all the user requirements regarding weight.

  Under such circumstances, additional weights to be attached to the sole of a putter have been developed and sold. However, the weight of this type of additional weight is about 10 to 20 g even if it is relatively heavy, and there is a significant limitation on the weight. For example, a weight of 100 to 200 g is added to the putter. I can't. Further, since this type of weight is attached to the sole of the putter, the appearance of the putter tends to be impaired.

  In addition, by requesting a specialized contractor to remodel the putter and increase the total weight, it is also done in some cases, but in general, when remodeling to match the individual putter customization, The costs were often very high.

  On the other hand, it is expected to perform a stable stroke by adding a weight of 100 to 200 g or more to the putter and greatly increasing the total weight.

Japanese Patent Laid-Open No. 2007-82605 discloses a putter characterized by externally fixing a weight formed in a cylindrical shape that is long in the axial direction.

  However, in the putter of Patent Document 1, it is possible to add a relatively heavy weight, but since the weight is attached to the outside of the shaft, the appearance of the putter may be impaired.

  Such a weight that can add a relatively heavy weight, can be easily and securely attached to a shaft of a golf club such as a putter, and does not impair the appearance of the golf club has been developed in the past. Was not.

  The object of the present invention is to solve the above-mentioned problems of the prior art, add a relatively heavy weight, and can be easily and securely attached to a shaft of a golf club such as a putter. An object of the present invention is to provide a weight for a golf club that does not impair the appearance of the golf club.

  In order to solve the above-described problems, a golf club weight according to a first aspect of the present invention is provided with a rod-shaped weight body that can be inserted into a shaft of a golf club, one end of the weight body, and the shaft. A first fixing means having a pressing surface for pressing the inner surface of the weight main body to fix the one end side of the weight main body to the shaft, and provided on the other end of the weight main body to press the inner surface of the shaft. And a second fixing means having a pressing surface for fixing the other end side of the weight body to the shaft.

  In the weight for a golf club according to the second aspect of the present invention, each of the first fixing means and the second fixing means is an internal thread formed at an end portion of the weight main body in the axial direction of the weight main body. It is composed of a male screw to be screwed in and an elastic sleeve attached to the shank portion of the male screw, and the elastic sleeve is sandwiched between the head of the male screw and the end surface of the weight main body, according to the screwing amount of the male screw The outer diameter of the elastic sleeve can be changed, and a predetermined tightening torque can be applied to the male screw.

  In the golf club weight according to the third aspect of the present invention, the male screw of the first fixing means and the male screw of the second fixing means are configured to have a screw thread in the same direction and the same pitch, In an initial state before the golf club weight is inserted into the shaft, the outer diameter of the elastic sleeve of the first fixing means is equal to or smaller than the outer diameter of the elastic sleeve of the second fixing means. Further, it is possible to set the tightening torque of the male screw of the first fixing means to be smaller than the tightening torque of the male screw of the second fixing means.

  According to the golf club weight according to the first aspect of the present invention, the first and second fixing means are respectively provided at one end and the other end of the weight main body that can be formed of a material having a relatively heavy weight. When the pressing surface of the first fixing means is pressed against the inner surface of the shaft of the golf club, one end side of the weight body is fixed to the shaft, and the pressing surface of the second fixing means is pressed against the inner surface of the shaft. Thus, the other end side of the weight body is fixed to the shaft. Therefore, a relatively heavy weight can be easily added to the shaft of a golf club such as a putter without impairing the appearance of the golf club.

  According to the golf club weight according to the second aspect of the present invention, each of the first fixing means and the second fixing means is screwed into the female screw formed in the axial direction of the weight body at the end of the weight body. It is composed of a male screw and an elastic sleeve attached to the shank of the male screw. The elastic sleeve is sandwiched between the head of the male screw and the end surface of the weight body, and the outer diameter of the elastic sleeve is set according to the screwing amount of the male screw. In addition to being changed, since a predetermined tightening torque is applied to the male screw, the overall structure is simple, and attachment and removal operations can be easily performed.

  According to the golf club weight according to the third aspect of the present invention, the male screw of the first fixing means and the male screw of the second fixing means are configured to have a screw thread in the same direction and the same pitch, In an initial state before the golf club weight is inserted into the shaft, the outer diameter of the elastic sleeve of the first fixing means is set to be the same as or smaller than the outer diameter of the elastic sleeve of the second fixing means. Further, since the tightening torque of the male screw of the first fixing means is set to be smaller than the tightening torque of the male screw of the second fixing means, the operating force applied to the male screw of the second fixing means is set to the weight body. Thus, the weight can be transmitted to the first fixing means, and the one end side of the weight main body can be firmly fixed by the shaft.

1 is a partial front view of a putter equipped with a golf club weight according to a first embodiment of the present invention. It is a front view of the weight for golf clubs concerning a 1st embodiment of the present invention. FIG. 3 is a partial cross-sectional view showing first fixing means of the golf club weight shown in FIG. 2. FIG. 3 is a partial cross-sectional view showing second fixing means of the golf club weight shown in FIG. 2. It is a fragmentary sectional view which shows the state by which the 1st fixing means shown in FIG. 3 was fixed to the shaft. It is a fragmentary sectional view which shows the state by which the 2nd fixing means shown in FIG. 3 was fixed to the shaft. It is a fragmentary sectional view showing the 1st fixing means of the weight for golf clubs concerning a 2nd embodiment of the present invention. It is a fragmentary sectional view showing the 2nd fixing means of the weight for golf clubs concerning a 2nd embodiment of the present invention. It is a fragmentary sectional view which shows the state by which the 1st fixing means shown in FIG. 7 was fixed to the shaft. It is a fragmentary sectional view which shows the state by which the 2nd fixing means shown in FIG. 8 was fixed to the shaft. It is a fragmentary sectional view showing the modification of the 1st fixing means of the weight for golf clubs concerning a 1st embodiment. It is a fragmentary sectional view which shows the state by which the 1st fixing means shown in FIG. 11 was fixed to the shaft. It is a fragmentary sectional view showing the 1st fixing means of the weight for golf clubs concerning a 3rd embodiment of the present invention. It is a fragmentary sectional view showing the 2nd fixing means of the weight for golf clubs concerning a 3rd embodiment of the present invention.

(First embodiment)
As shown in FIG. 1, the golf club weight W <b> 1 according to the first embodiment of the present invention is attached to the grip G side end portion inside the shaft S of the putter P.

  Hereinafter, the golf club weight W1 according to the first embodiment of the present invention will be described with reference to FIGS.

  As shown in FIG. 2, the weight W1 of the present invention includes a weight main body 1, first fixing means 2 provided at one end thereof, and second fixing means 3 provided at the other end thereof.

  The weight body 1 is made of a metal bar, and has a predetermined outer diameter and a predetermined length that can be inserted from the rear end of the shaft S of the putter P. As will be described later, female threads 1a and 1b for the first fixing means 2 and the second fixing means 3 are formed at both ends of the weight body 1, respectively. In order to easily form such female threads, It is preferable to use a soft iron bar as the metal bar. As an example, a rod of soft iron having a length of 200 to 300 mm, an outer diameter of 10 mm, and a weight of 200 g is used as the weight body 1.

  The first fixing means 2 includes a male screw 4 screwed into one end of the weight body 1 and an elastic sleeve 6 attached to the male screw 4. The male screw 4 is screwed into a female screw 1 a formed in the central axis direction of the weight body 1. The elastic sleeve 6 is formed in a cylindrical shape from an elastic material such as synthetic resin or synthetic rubber, and is attached to the shank portion 4 a of the male screw 4. The elastic sleeve 6 has an outer diameter substantially the same as the outer diameter of the weight body 1. The elastic sleeve 6 is sandwiched between the head of the male screw 4 and the end surface of the weight main body 1, and the outer diameter of the elastic sleeve changes according to the screwing amount of the male screw 4, and a predetermined tightening torque is applied to the male screw 4. Give. That is, the elastic sleeve 6 is sandwiched between the head of the male screw 4 and the end surface of the weight main body 1 by tightening the male screw 4 to the weight main body 1, and is elastically deformed to increase the outer diameter. The outer surface 6a of the elastic sleeve 6 acts as a pressing surface for fixing the one end side of the weight body 1 to the shaft S by pressing the inner surface of the shaft S (see FIG. 5) with such elastic deformation. To do. On the other hand, the elastic sleeve 6 that is elastically deformed between the head of the male screw 4 and the end surface of the weight main body 1 generates a reaction force, which gives the male screw 4 a predetermined tightening torque. In order to prevent damage to the elastic sleeve 6 during the screwing operation of the male screw 4, as shown in FIG. 3, between the one end of the elastic sleeve 6 and the head of the male screw 4 and the elastic sleeve 6. Washers 7 and 8 are disposed between the other end and the end surface of the weight body 1, respectively. However, these washers are not necessarily required when the elastic sleeve 6 has sufficient durability.

  The second fixing means 3 is configured similarly to the first fixing means 2. That is, the second fixing means 3 includes a male screw 5 screwed into the other end of the weight body 1 and an elastic sleeve 11 attached to the male screw 5. The male screw 5 is screwed into a female screw 1 b formed in the central axis direction of the weight body 1. The elastic sleeve 11 is formed in a cylindrical shape from an elastic material such as synthetic resin or synthetic rubber, and is attached to the shank portion 5 a of the male screw 5. The elastic sleeve 11 has an outer diameter that is substantially the same as the outer diameter of the weight body 1. The elastic sleeve 11 is sandwiched between the head of the male screw 5 and the end surface of the weight main body 1, and the outer diameter of the elastic sleeve changes according to the screwing amount of the male screw 5, and a predetermined tightening torque is applied to the male screw 5. Give. That is, the elastic sleeve 11 is sandwiched between the head of the male screw 5 and the end surface of the weight main body 1 by tightening the male screw 5 to the weight main body 1, and is elastically deformed to increase the outer diameter. The outer surface 11a of the elastic sleeve 11 acts as a pressing surface for fixing the one end side of the weight body 1 to the shaft S by pressing the inner surface of the shaft S (see FIG. 6) with such elastic deformation. To do. On the other hand, the elastic sleeve 11 that is elastically deformed between the head of the male screw 5 and the end surface of the weight main body 1 generates a reaction force, which gives the male screw 5 a predetermined tightening torque. In order to prevent the elastic sleeve 11 from being damaged during the screwing operation of the male screw 5, as shown in FIG. 4, between the one end of the elastic sleeve 11 and the head of the male screw 5 and the elastic sleeve 11. Washers 9 and 10 are respectively disposed between the other end and the end surface of the weight body 1. However, these washers are not necessarily required when the elastic sleeve 11 has sufficient durability.

  Next, a method of mounting the golf club weight W1 according to the first embodiment of the present invention on the shaft S of the putter P will be described with reference to FIGS.

  First, the grip G is removed from the putter P. Next, the golf club weight W1 is arranged on the outer peripheral surface of the shaft S, and this is moved along the shaft S, and is disposed at a position where it is desired to be mounted (hereinafter referred to as “mounting desired position”). At this time, the outer diameter of the shaft S is measured at a position corresponding to the elastic sleeve 6 of the first fixing means of the golf club weight W1.

  Next, the male screw 4 of the first fixing means 2 in the golf club weight W1 is tightened with respect to the weight body 1, the elastic sleeve 6 is elastically deformed as shown in FIG. 5, and the outer diameter thereof is measured as described above. The shaft S is increased to a value slightly smaller than the outer diameter of the shaft S. In such a state, the golf club weight W1 is inserted into the shaft S from the first fixing means 2 side. The shaft S is tapered so that the head side becomes thinner, and the elastic sleeve 6 of the first fixing means 2 with the increased outer diameter comes into contact with the inner surface of the shaft S, making further insertion impossible. In the shaft S, the vicinity of the desired mounting position is reached. In this state, the golf club weight W <b> 1 is further pushed into the shaft S to ensure that the first fixing means 2 is firmly fixed in the shaft S.

  Next, as shown in FIG. 6, the male screw 5 of the second fixing means 3 is tightened. When such tightening is performed, the elastic sleeve 11 of the second fixing means 3 is sandwiched between the head of the male screw 5 and the end surface of the weight main body 1 and is elastically deformed to increase the outer diameter. Press the inner surface of S. If the tightening operation of the male screw 5 is performed to such an extent that the elastic sleeve 11 cannot be substantially deformed between the head of the male screw 5 and the end surface of the weight body 1, further tightening of the male screw 5 becomes difficult. The tightening operation is finished, and the second fixing means 3 is firmly fixed to the shaft S.

  After the golf club weight W1 is mounted in the shaft S, the grip G is attached to the shaft by a known method.

  Thus, by attaching the golf club weight W1 in the shaft S, a weight of about 200 g can be added to the putter P without impairing the appearance, and a stable stroke can be performed.

  Of course, when removing the golf club weight W1 from the shaft S, the golf club weight W1 can be easily removed by an operation reverse to that described above.

(Second Embodiment)
Next, a golf club weight according to a second embodiment of the present invention will be described below with reference to FIGS.

  In the weight for a golf club according to the second embodiment of the present invention, the male screw 4 of the first fixing means 2 and the male screw 5 of the second fixing means 3 have a thread in the same direction and the same pitch. In the initial state before the golf club weight is inserted into the shaft S, the outer diameter of the elastic sleeve 6 of the first fixing means 2 is the same as the outer diameter of the elastic sleeve of the second fixing means 3. Alternatively, the tightening torque of the male screw 4 of the first fixing means 2 is set to be smaller than the tightening torque of the male screw 5 of the second fixing means 3. Except for the features described above, the weight is the same as that for the golf club according to the first embodiment of the present invention. Accordingly, the same components are denoted by the same reference numerals, and descriptions thereof are omitted.

  In order to achieve the above-described features, the first fixing means 2 uses a single elastic sleeve 6 as shown in FIG. 7, while the second fixing means 3 shows as shown in FIG. In addition, two elastic sleeves, that is, an elastic sleeve 11 as an inner layer and an elastic sleeve 12 as an outer layer are used. The elastic sleeve 12 of the second fixing means 3 has the same size as that of the elastic sleeve 6 of the first fixing means 2, and therefore both of them are mutually different in outer diameter, inner diameter, length and thickness. Are the same. The elastic sleeve 11 of the second fixing means 3 reinforces the elastic sleeve 12 to provide a large tightening torque, and has an outer diameter slightly smaller than the inner diameter of the elastic sleeve 12 as an outer layer. In addition, the elastic sleeve 12 has a thickness slightly smaller than the thickness of the elastic sleeve 12. Various conditions such as the outer diameter of the elastic sleeves 11 and 12 are determined according to the tightening torque to be applied by the entire second fixing means 3.

  Next, a method for mounting the golf club weight according to the second embodiment of the present invention on the shaft of the putter will be described below.

  As in the first embodiment described above, first, the grip G is removed from the putter P. Next, the golf club weight W1 is arranged on the outer peripheral surface of the shaft S, and this is moved along the shaft S, and is disposed at a position where it is desired to be mounted (hereinafter referred to as “mounting desired position”). At this time, the outer diameter of the shaft S is measured at a position corresponding to the elastic sleeve 6 of the first fixing means 2 of the weight W for the golf club.

  Next, the male screw 4 of the first fixing means 2 in the weight for the golf club is tightened with respect to the weight body 1 to elastically deform the elastic sleeve 6, and the outer diameter thereof is measured as described above. To a slightly smaller value. In such a state, the golf club weight is inserted into the shaft S from the first fixing means 2 side. The shaft S is tapered so that the head side becomes thinner, and the elastic sleeve 6 of the first fixing means 2 with the increased outer diameter comes into contact with the inner surface of the shaft S, making further insertion impossible. In the shaft S, the vicinity of the desired mounting position is reached. In this state, a screwdriver or the like is set on the male screw 5 of the second fixing means 3 to apply a rotational force. The male screw 4 of the first fixing means 2 and the male screw 5 of the second fixing means 3 are configured to have the same thread direction and the same pitch, and the golf club weight is inserted into the shaft S. Since the tightening torque of the male screw 4 of the first fixing means 2 is set to be smaller than the tightening torque of the male screw 5 of the second fixing means 3 in the initial state before When the rotational force is applied, the male screw 5 of the second fixing means 3 and the weight main body 1 are integrally rotated with respect to the male screw 4 of the first fixing means 2. Thereby, the elastic sleeve 6 of the 1st fixing means 2 further elastically deforms, and the outer diameter further increases. The elastic sleeve 6 is firmly fixed to the inner surface of the shaft S in a state where the increase in the outer diameter of the elastic sleeve 6 reaches the maximum, and the male screw 4 and the weight main body 1 are connected to the elastic sleeve 6 via the elastic sleeve 6. Are locked together.

  In such a state, when a rotational force is continuously applied to the male screw 5 of the second fixing means 3, the male screw 5 of the second fixing means 3 is screwed into the weight body 1, and tightening in the second fixing means 3 is executed. Is done. When such tightening is performed, the elastic sleeves 11 and 12 of the second fixing means 3 are sandwiched between the head of the male screw 5 and the end surface of the weight main body 1 and elastically deformed. Each outer diameter increases, and the elastic sleeve 12 as an outer layer presses the inner surface of the shaft S. If the tightening operation of the male screw 5 is performed to such an extent that the elastic sleeves 11 and 12 cannot be substantially deformed between the head of the male screw 5 and the end surface of the weight main body 1, it is difficult to further tighten the male screw 5. In this state, the tightening operation is finished, and the second fixing means 3 is firmly fixed to the shaft S.

  After the golf club weight is mounted in the shaft S, the grip G is attached to the shaft by a known method.

  Thus, by attaching the weight for the golf club in the shaft S, a weight of about 200 g can be added to the putter P without impairing the appearance, and a stable stroke can be performed.

  Of course, when the golf club weight is removed from the shaft S, it can be easily removed by the reverse operation to that described above.

  According to the golf club weight according to the second embodiment of the present invention described above, the first fixing means is first applied by applying a rotational force to the male screw 5 of the second fixing means 3 after being inserted into the shaft S. The male screw 4 of the second fixing means 3 is continuously tightened after the male screw 4 of the second fixing means 3 is tightened, and the male screw 5 of the second fixing means 3 is continuously tightened. It can be carried out.

  In the first fixing means 2 of the golf club weight according to the first embodiment described above, the elastic sleeve 6 is elastically deformed and the outer diameter thereof increases as the male screw 4 is tightened. When the contact resistance between the head of the male screw 4 and each of the end surfaces of the weight body 1 is relatively large, the elastic sleeve 6 itself may be twisted. Of course, even in this case, there is no problem because the outer diameter of the elastic sleeve 6 increases with elastic deformation. However, the outer diameter of the elastic sleeve 6 can be minimized to stabilize the outer diameter. Is preferably increased. Such twisting of the elastic sleeve may occur similarly in the second fixing means 3 of the golf club weight according to the first embodiment, and the first of the golf club weight according to the second embodiment. This may also occur in the fixing means 2 and the second fixing means 3. FIG. 11 shows a modified example of the first fixing means of the weight for a golf club according to the first and second embodiments for preventing the twisting of the elastic sleeve 6.

  In the first fixing means 2, a deformation restraining ring 13 is fitted at the substantially central portion of the outer periphery of the elastic sleeve 6. The deformation restraining ring 13 has an inner diameter slightly smaller than the outer diameter of the elastic sleeve 6, and is forcibly fitted at the above-described position of the elastic sleeve 6. The deformation restraining ring 13 restrains the deformation of the elastic sleeve 6 at the mounting position. In this way, the action of restraining the change of the elastic sleeve 6, in other words, the axial length of the elastic sleeve is shorter than the axial length of the elastic sleeve. As long as it has the property to give a restraining force, the material of the deformation | transformation restraint ring 13 is arbitrary, For example, it forms from a metal, a synthetic resin, etc. Moreover, the attachment position of the deformation | transformation restraint ring 13 with respect to the elastic sleeve 6 is also arbitrary. Furthermore, the cross-sectional shape of the deformation restraining ring 13 is also arbitrary. For example, it may have a rectangular cross-section or an elliptical cross-section as well as the circular cross-section shown in FIG.

  Next, the operation of the deformation restraining ring 13 will be described below with reference to FIG.

  As in the first embodiment described above, when the male screw 4 of the first fixing means 2 is fastened to the weight body 1, the elastic sleeve 6 is elastically deformed. Here, when the contact resistance between the elastic sleeve 6 and each of the head of the male screw 4 and the end surface of the weight main body 1 is relatively large, the elastic sleeve 6 has the male screw 4 attached thereto as the male screw 4 is tightened. A force that deforms the elastic sleeve 6 acts along the thread direction. However, the deformation restraining ring 13 restrains the deformation of the elastic sleeve 6 at the mounting position and disperses the above-described force up and down. As a result, it is avoided that the elastic sleeve 6 itself is largely twisted, and the elastic sleeve 6 is substantially divided into two vertically in FIG. 12 with the deformation restraining ring 13 as a boundary, and each elastically deforms. , Its outer diameter increases.

  11 and 12, the deformation restraining ring 13 has been described as an example applied to the first fixing means 2 of the weight for a golf club according to the first embodiment, but the second fixing means 3 according to the first embodiment is described as an example. It can also be applied, and can also be applied to the first fixing means 2 and the second fixing means 3 of the golf club weight according to the second embodiment.

  11 and 12 illustrate the case where the single deformation restraining ring 13 is attached to the elastic sleeve 6, but it is also possible to attach a plurality of deformation restraining rings to the elastic sleeve.

(Third embodiment)
Next, a golf club weight according to a third embodiment of the present invention will be described with reference to FIGS.

  In the golf club weight according to the third embodiment of the present invention, the first fixing means 2 has two deformation restricting rings 14 and 15, and the second fixing means 3 has three deformation restricting rings 16, 17, 18 is the same as the golf club weight according to the first embodiment shown in FIGS. Accordingly, the same components are denoted by the same reference numerals and detailed description thereof is omitted.

  As shown in FIG. 13, in the golf club weight according to the third embodiment of the present invention, the elastic sleeve 6 of the first fixing means 2 has two deformation restraining rings 14 at the upper and lower ends on the outer periphery. 15 are respectively fitted. The deformation restraining rings 14 and 15 are obtained by cutting a tube made of a synthetic resin into a predetermined length, and have a rectangular cross section as shown in FIG.

  On the other hand, as shown in FIG. 14, in the golf club weight according to the third embodiment of the present invention, the elastic sleeve 11 of the second fixing means 2 has an upper end, a central portion, and a lower end on the outer periphery. Three deformation restraining rings 16, 17 and 18 are respectively fitted. Similar to the deformation restraining rings 14 and 15, the deformation restraining rings 16, 17 and 18 are obtained by cutting a tube made of synthetic resin into a predetermined length, and have a rectangular cross section as shown in FIG. have.

  According to the weight for a golf club according to the third embodiment of the present invention, when the male screw 4 of the first fixing means 2 is fastened to the weight main body 1, the elastic sleeve 6 has the head of the male screw 4 and the end surface of the weight main body 1. Is elastically deformed by being sandwiched between the two, increasing the outer diameter. During the elastic deformation, the deformation restraining rings 14 and 15 restrain the deformation at the upper end and the lower end of the elastic sleeve 6, and the entire elastic sleeve 6 is prevented from being greatly twisted and deformed. As a result, the elastic sleeve 6 is uniformly deformed between the deformation restraining rings 14 and 15, and accordingly, the outer diameter of the elastic sleeve 6 is increased uniformly.

  Further, according to the golf club weight according to the third embodiment of the present invention, when the male screw 5 of the second fixing means 3 is fastened to the weight main body 1, the elastic sleeve 11 is attached to the head of the male screw 5 and the weight main body 1. It is sandwiched between the end face and elastically deforms, increasing the outer diameter. During this elastic deformation, the deformation restraining rings 16 and 18 restrain the deformation at the upper and lower ends of the elastic sleeve 11, while the elastic restraining ring 17 deforms the elastic sleeve 11 between the deformation restraining rings 16 and 18. The force to be distributed is distributed up and down, so that the entire elastic sleeve 11 is avoided from being largely twisted and deformed. As a result, the elastic sleeve 11 is uniformly deformed between the deformation restraining rings 16 and 17 and between the deformation restraining rings 17 and 18, and accordingly, the outer diameter of the elastic sleeve 11 is uniformly increased.

In the third embodiment, the first fixing means 2 is provided with the two deformation restricting rings 7 and 8, and the second fixing means 3 is provided with the three deformation restricting rings 16, 17 and 18. The application of the present invention is not limited to this. That is, three deformation restraining rings may be provided for the first fixing means 2 as shown in FIG. 14, or two deformation restricting rings may be provided for the second fixing means 3 as shown in FIG. Also good.
13 and 14, the deformation restraining ring is described as an example applied to the first fixing means 2 and the second fixing means 3 of the golf club weight according to the first embodiment. The present invention can also be applied to the first fixing means 2 and the second fixing means 3 of the golf club weight according to the second embodiment.

(Other application examples)
In the above description of the first to third embodiments, the golf club weight is described as being attached to the shaft of the putter. However, the golf club weight is attached to a shaft of another club such as a wood club or an iron club. It is also possible to do.

W1 Weight for golf club 1 Weight body 2 First fixing means 3 Second fixing means 4, 5 Male threads 6, 11, 12 Elastic sleeve

Claims (3)

A rod-shaped weight body that can be inserted into the shaft of the golf club;
A first fixing means provided at one end of the weight main body and having a pressing surface for pressing the inner surface of the shaft and fixing the one end side of the weight main body to the shaft;
A second fixing means provided on the other end of the weight body and having a pressing surface for pressing the inner surface of the shaft and fixing the other end side of the weight body to the shaft. weight.   Each of the first fixing means and the second fixing means includes a male screw screwed into an internal thread formed in an axial direction of the weight main body at an end portion of the weight main body, and an elastic sleeve attached to the shank portion of the male screw. The elastic sleeve is sandwiched between the head of the male screw and the end surface of the weight body, and the outer diameter of the elastic sleeve changes according to the screwing amount of the male screw, and the male screw 2. The golf club weight according to claim 1, wherein a predetermined tightening torque is applied.   Each of the first fixing means and the second fixing means further includes a deformation restraining ring that is fitted to a predetermined portion of the elastic sleeve and restricts deformation of the predetermined portion. The weight for golf clubs according to 2.

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