JPH0420463Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] This invention is a golf club, in particular, a golf club, in which the angle at which the club head is attached to the club shaft is varied in multiple steps, so that one club can be used for multiple purposes. The present invention relates to an improvement in a golf club having a variable club head.

[Conventional technology]

In the past, many variable head golf clubs have been known in which the angle at which the club head is attached to the club shaft is selectively varied so that one club can be used for multiple purposes.

Among these variable head clubs, one that is particularly well known has a cylindrical portion on the back of the head, and a support shaft protruding from the base end of the shaft that is inserted into the cylindrical portion. When inserting the support into the cylinder, a gear-shaped angle selector is interposed between the shaft base end and the cylinder, and the support is inserted into the cylinder so that it passes through the coil spring stored in the cylinder and reaches the outer end of the cylinder. Some have a set screw fixed to the tip of the shaft (Utility Model No. 50-84140, Utility Model No. 52-44869)
issue).

[Problem that the invention attempts to solve]

In a type of variable head club in which a gear-shaped angle selector is interposed between the base end of the shaft and the cylindrical portion, when attempting to change the angle of the head, the set screw at the outer end of the cylindrical portion must be loosened. Rotate it so that the tightening force between the selector and the inner end of the cylinder part is loosened by the elasticity of the spring. In this state, adjust the mounting angle between the shaft base end and the cylinder part to the position of another tooth on the selector, and then turn it again. Tighten the set screw to fix the angle between the shaft and head. That is, in this type of club, as an operation for selectively varying the mounting angle of the head,
It is necessary to use your fingertips to loosen or tighten the set screw screwed onto the tip of the support shaft at the outer end of the cylinder.

However, as a practical matter, each time you change the angle of the club head during play, it is not only extremely cumbersome to loosen and tighten the set screw with your fingertips, but also the tightening force of the set screw after setting the angle is extremely low. If this is not sufficient, the meshing connection between the selector and the cylindrical body will loosen and come off due to the impact when the ball is hit, resulting in the disadvantage that the ball cannot be shot accurately.

[Means for solving problems]

In order to solve the above-mentioned problems with conventional variable head clubs, the present invention allows the head installation angle to be easily changed without the trouble of loosening or tightening the set screw at the tip of the spindle. This is what I did. As a specific means for this purpose, the present invention provides a cylindrical part on the back of the head that has internal teeth on a part of its inner peripheral surface and a slit cut out at the outer end, and has external teeth that mesh with the internal teeth. A support shaft at the proximal end of the club shaft, which is provided in a portion, is inserted into the cylindrical portion, a coil spring having one end abutting the internal teeth is fitted on the outer periphery of the support shaft within the cylindrical portion, and a coil spring is fitted at the outer periphery of the shaft within the cylindrical portion, and the outer end of the cylindrical portion A boss provided with a protrusion that engages with the outer end of the cylindrical portion is fitted onto the support shaft, and the inner end of the boss and the other end of the coil spring are brought into contact with each other, and the support shaft is It is characterized in that a locking nut is fixed to the tip to hold the boss on the support shaft against the biasing force of the coil spring.

[Effect]

In the club of this invention, when the entire spindle is inserted into the cylindrical part and the external teeth on the spindle mesh with the internal teeth at predetermined positions in the cylindrical part, the boss fitted on the tip of the spindle is The piece engages with the outer end of the cylindrical portion to securely hold the head at a predetermined angle without the spindle being pulled out of the cylindrical portion.

When changing the angle of the head to another angle, the protrusion that is locked to the outer end of the cylindrical portion is rotated to the position of the slit in the cylindrical portion, and the head and the base end of the shaft are pulled together. Pull it apart. As a result, the boss at the tip of the support shaft is drawn into the cylindrical portion while compressing the spring as the protruding piece moves along the slit, so that the external teeth on the support shaft are disengaged from the internal teeth of the cylindrical portion. With the inner and outer teeth disengaged, change the angle of the head with respect to the spindle as appropriate and bring the base end of the shaft and the head together so that the entire spindle returns to the inside of the cylinder. The teeth and the internal teeth of the barrel engage at different positions, and the head is at the selected angle of inclination. In this state, the protruding piece of the boss protrudes again to the outer end of the cylinder outside the slit, so the protruding piece is rotated so as to be removed from the slit, and the protruding piece is locked to the outer end of the cylinder, and the support shaft is pulled again. Prevent it from being returned.

〔Example〕

Next, a preferred embodiment of the golf club according to the present invention will be described with reference to the drawings. As shown in FIG. a support shaft 6 protruding from the base end 5 of the support shaft 6 to be inserted into the cylindrical portion 2; and a protrusion rotatably fitted to the tip of the support shaft 6 via a nut 7. 9 and a boss 8.

The cylindrical part 2 provided on the back surface of the head 1 has internal teeth 10 on a part of the inner peripheral surface, that is, in a part near the heel 1b.
is provided around the periphery, and a slit 11 is cut out along the length direction in a part of the outer end 3.

On the other hand, a support shaft 6 protruding from the shaft base end 5
is slightly longer than the cylindrical portion 2, and is provided with external teeth 12 that mesh with the internal teeth 10 within the cylindrical portion 2 on a part of the outer circumferential surface, that is, a portion closer to the base end 5. There is. Further, this support shaft 6 is thinner than the inner diameter of the cylindrical portion 2, and has a female thread 13 on the inner periphery of the tip.
is provided.

As shown in FIG. 2, when the entire length of the support shaft 6 is inserted into the cylindrical portion 2, the external teeth 12 mesh with a portion of the internal teeth 10, and the head 1 is moved at a predetermined loft angle with respect to the shaft 4. In this state, the coil spring 14 is inserted into the outer periphery of the support shaft 6 inside the cylindrical portion 2 from the outer end opening of the cylindrical portion 2. This spring 14 has a length that occupies a space between the inner end of the internal teeth 10 and the outer end 3 of the cylindrical portion, and after this spring 14 is inserted, the spring 14 is compressed at the tip of the support shaft 6. In this manner, the boss 8 is fitted, and the nut 7 for holding the boss 8 at the tip of the spindle 6 is screwed onto the female thread 13 at the tip of the spindle 6. The outer diameter of the head of the nut 7 is approximately the same as the outer diameter of the boss 8, and the protruding piece 9 protruding from the outer periphery of the boss 8 is thick enough to freely move along the slit 11 of the cylindrical portion 2. It has a certain quality.

As shown in FIG. 2, when the boss 8 is attached to the tip of the support shaft 6 with the nut 7, the projection 9 of the boss 8 engages with the outer end 3 of the cylindrical portion, and the support shaft 6 is moved inside the cylindrical portion 2. movement is prevented. Therefore, the head 1 is firmly held and fixed with a predetermined loft angle given to the shaft 4 by the meshing of the internal teeth 10 and the external teeth 12.

To change the loft angle of the head 1, use your fingertips to pick up the protrusion 9 of the boss 8 that is engaged with the outer end 3 of the cylindrical portion and rotate it until it fits into the slit 11 of the cylindrical portion 2. The proximal end portion 5 and the head 1 are separated from each other to separate the engagement between the internal teeth 10 and external teeth 12. When the internal teeth 10 and external teeth 12 are separated, the loft angle of the head 1 can be varied, so the angle of the head 1 with respect to the shaft base end 5 is changed, and in that state, the internal teeth 10 and external teeth 12 mesh again. , the support shaft 6 is pulled back into the cylindrical part 2 by the elasticity of the spring 14, and the protruding piece 9 of the boss 8 is inserted into the slit 11.
It is engaged with the outer end 3 of the outer cylindrical part.

In the embodiment described above, the internal teeth 10 of the cylindrical portion 2 and the external teeth 12 of the support shaft 6 are provided in a portion close to the shaft base end 5, and as an operation for changing the angle of the head 1, Although the inner and outer teeth were removed by pulling the shaft base end 5, the inner and outer teeth and the boss were provided in the opposite parts from those in the previous embodiment to change the angle of the head. In this operation, the inner and outer teeth may be removed by pushing the head toward the proximal end of the shaft.

〔effect〕

In the golf club of the present invention, the loft angle of the head 1 relative to the shaft 4 is set by meshing the internal teeth 10 provided on the inner peripheral surface of the cylindrical portion 2 with the external teeth 12 provided on the spindle 6 as described above. At the same time, in this state, the protrusion 9 of the boss 8 fitted to the tip of the support shaft 6
is engaged with the outer end 3 of the cylindrical portion, so that the support shaft 6 and the cylindrical portion 2
Rotation and sliding between the shaft 4 and the shaft 4 are reliably prevented.
A reliable connection between the head 1 and the head 1 at a predetermined angle can be obtained. Therefore, in order to change the loft angle of the head 1, the protrusion 9 on the outer end 3 of the cylindrical portion is pinched and the slit 1 of the cylindrical portion is adjusted.
Rotate to position 1, and connect shaft base end 5 and head 1.
This can be done by a simple operation of pulling the head 1, changing the angle of the head 1, returning it to its original position, and engaging the projection 9 with the outer end 3 of the cylinder outside the slit 11. As a result, with this invention, the inclination angle of the head can be changed efficiently and easily during play, compared to the uncertain and complicated switching means of tightening and loosening a set screw as in conventional clubs of this type. Go to
The practicality of this type of golf club can be improved.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway rear view showing the components of the golf club according to the present invention in an exploded manner, FIG.
The figure is a sectional view taken along the - line in Fig. 2, and Fig. 4 is a sectional view taken along the - line in Fig. 3, showing the state when the head angle is changed.
It is a sectional view seen from a line direction. 1...Head, 2...Cylinder part, 3...Cylinder part outer end,
4... Shaft, 5... Shaft base end, 6...
Support shaft, 7...nut, 8...boss, 9...protrusion,
10...Internal tooth, 11...Slit, 12...External tooth, 13...Female thread, 14...Spring.

Claims (1)

[Scope of utility model registration request] A cylindrical portion having internal teeth on a part of the inner peripheral surface and a slit cut out at the outer end is provided on the back side of the club head, and a part of the proximal end of the club shaft is provided with external teeth that mesh with the internal teeth. A support shaft is inserted into the cylindrical portion, and a coil spring is fitted on the outer periphery of the support shaft inside the cylindrical portion, one end of which abuts against the inner teeth, and a coil spring that engages with the outer end of the cylindrical portion is fitted inside the outer end of the cylindrical portion. A boss provided with a mating protrusion is fitted onto the support shaft, the inner end of the boss and the other end of the coil spring are brought into contact, and the tip of the support shaft is provided with a portion that resists the biasing force of the coil spring. and a locking nut that holds the boss on the support shaft.