JP5391693B2 - Golf club head - Google Patents

Description

  The present invention relates to a golf club head, and more particularly to a golf club head in which a weight member for adjusting the weight and center of gravity of a head body can be attached and detached in a short time.

  2. Description of the Related Art Conventionally, it has been widely practiced to adjust the weight and center of gravity of a head body by attaching a weight member to the head body of a golf club head. This weight member is usually fixed to the head body with screws so that it does not fall off during swinging. For example, Patent Document 1 proposes a golf club head in which a weight portion having a male screw portion is screwed and fixed in a recess of a head body having a female screw portion.

  However, in the golf club head described above, when attaching or removing the weight member, it is necessary to turn the weight member several times using a jig, so there is a problem that it takes time to attach and detach the weight member. .

JP-T-2006-505367

  An object of the present invention is to provide a golf club head in which a weight member for adjusting the weight of a head body can be attached and detached in a short time.

The golf club head of the present invention to achieve the above object, together with the mounting holes provided (7) a head body having a hollow structure (5) comprises a weight member (6) which is mounted to the mounting hole (7) in and a golf club head, respectively on one end surface fitted with a magnet (8, 9) of said weight member abutting the bottom surface to the bottom surface and the time of attachment of the mounting hole (7) (6), said magnet (8, 9) While at least one set of N pole and S pole appears on the surface of the weight member, the other end face of the weight member (6) is provided with an engagement hole (15) having a partly widened bottom, and the engagement A substantially L-shaped drawing jig (16) whose tip is engaged with the widened portion (17) of the hole (15) is provided .

The golf club head preferably includes means for preventing the weight member (6) from falling out of the mounting hole (7), and the means for preventing the drop from the one end to the other end of the side surface of the weight member (6). A longitudinal groove (11) that extends and a protrusion (12) that is formed in the opening of the mounting hole (7) and fits into the longitudinal groove (11) can be formed.

As for the above-described golf club heads, it is preferable to cover the surface thereof a magnet (8,9) in plastic film even without low.

  According to the golf club head of the present invention, the magnet is attached to the bottom surface of the mounting hole provided in the portion excluding the face portion of the head main body and the one end surface of the weight member in contact with the bottom surface, and at least 1 is attached to the surface of the magnet. Since the pair of N poles and S poles appears, the weight member can be attached to and detached from the mounting member in a short time because the magnet attracting force or repulsive force is generated by rotating the weight member halfway within the mounting hole. Can be done easily.

1 is a bottom view of a golf club head according to an embodiment of the present invention. FIG. 2 is a partial cross-sectional view taken along line AA in FIG. 1. It is an assembly drawing of the weight member to the mounting hole. It is a top view of a magnet, Comprising: (a) shows the case where N pole and S pole are 1 set, (b) shows the case where N pole and S pole are 2 sets, respectively. The structure of the weight member in an example of a drop-off prevention means is shown, (a) shows a side view and (b) shows a BB arrow in (a). The structure of the mounting hole in an example of a drop-off prevention means is shown, (a) shows a cross-sectional view of the side, and (b) shows a CC arrow view in (a). The attachment process of the weight member in an example of a drop prevention means is shown, (a) shows the process of inserting the weight member into the mounting hole, and (b) shows the process of fixing the weight member. The attachment process of the weight member in the other example of drop-off prevention means is shown, (a) shows the process of inserting the weight member into the mounting hole, and (b) shows the process of fixing the weight member. The other example of the structure of a weight member is shown, (a) shows a side view, (b) shows DD arrow in (a), respectively. FIG. 10 is a partial cross-sectional view showing the weight member removal step of FIG. 9, wherein (a) shows a step of inserting a jig, (b) shows a step of engaging the jig, and (c) shows a jig. The process of pulling out the weight member is shown respectively.

  Embodiments of the present invention will be described below with reference to the drawings.

  1 and 2 show a golf club head according to an embodiment of the present invention.

  This golf club head has a hollow portion in which a crown portion 2 is connected to an upper edge portion of a face portion 1 for hitting a golf ball, a sole portion 3 is connected to a lower edge portion, and a hosel 4 is formed in a part of the crown portion 2. A head body 5 having a structure is configured. A mounting hole 7 for mounting a weight member 6 for adjusting the weight and center of gravity of the head main body 5 is formed in the sole portion 3. The weight member 6, which is separate from the head main body 5, The mounting hole 7 is fixed by a magnetic force.

  Details of the weight member 6 and the mounting hole 7 are shown in FIG. The weight member 6 has a cylindrical shape made of a metal having a large specific gravity such as iron or tungsten, and a plurality of types are prepared according to weight within a range of about 3 g to 20 g. Further, the mounting hole 7 of the head main body 5 has a size that can accommodate the weight member 6. The number and positions of the mounting holes 7 are not limited to those shown in FIGS. 1 and 2, but need to be provided at least in a portion excluding the face portion 1. Magnets 8 and 9 are respectively attached to the bottom surface of the mounting hole 7 and one end surface of the weight member 6 that contacts the bottom surface when mounting. The material of the magnets 8 and 9 is not particularly limited, but it is preferable to use a material that generates a strong magnetic force such as neodymium or samarium cobalt. These magnets 8 and 9 have at least one pair of N and S poles appearing on the surface, but from the viewpoint of manufacturing cost and generated magnetic force, one set as shown in FIG. It is preferable that two sets of N poles and S poles appear as shown in 4 (b).

  As described above, the magnets 8 and 9 are attached to the bottom surface of the mounting hole 7 provided in the portion excluding the face portion 1 of the head body 5 of the golf club head and the one end surface of the weight member 6 contacting the bottom surface, respectively. Since at least one pair of N pole and S pole appears on the surfaces of the magnets 8 and 9, if the weight member 6 inserted into the mounting hole 7 of the head body 5 is rotated halfway at most, the weight member 6 Since the magnet 9 and the magnet 8 in the mounting hole 7 are attracted or repelled by magnetic force, the weight member 6 can be easily mounted and removed in a short time.

  At this time, it is preferable to form a radial groove 10 into which a toe, a coin or the like is engaged on the other end surface of the weight member 6 so that the player can easily rotate the weight member 6.

  In the above golf club head, it is desirable to provide a drop prevention means so that the weight member 6 mounted and fixed in the mounting hole 7 does not fall off during play.

  An example of the drop-off prevention means is shown in FIGS. The drop-off preventing means is formed on the side surface of the weight member 6, formed in the vertical groove 11 (FIG. 5) extending from one end portion to the other end portion, and in the opening portion of the mounting hole 7. It is comprised from the protrusion 12 (FIG. 6) to fit. With this configuration, the weight member 6 is inserted into the mounting hole 7 while fitting the protrusion 12 of the mounting hole 7 into the vertical groove 11 of the weight member 6 (FIG. 7A), and the vertical groove 11 When the weight member 6 is rotated after the fitting of the protrusion 12 is released, the magnets 8 and 9 are attracted to each other and the weight member 6 is supported on the protrusion (FIG. 7B). It is possible to prevent the weight member 6 from falling off during play. The circumferential positions of the longitudinal grooves 11 and the protrusions 12 are not particularly limited, but it is preferable to provide 2 to 4 positions symmetrically with respect to the center. Further, the positions of the N pole and S pole appearing on the surfaces of the magnets 8 and 9 need to be shifted from each other in the circumferential direction with respect to the positions of the longitudinal grooves 11 and the protrusions 12.

  Another example of the drop-off preventing means is shown in FIG. The drop-off prevention means includes a male screw portion 13 formed on the side surface near one end of the weight member 6 and a female screw portion 14 formed on the inner surface near the bottom surface of the mounting hole 7. 13 and the female screw portion 14 are screwed to each other when they are half-rotated at most. With this configuration, when the weight member 6 is inserted into the mounting hole 7 and rotated, the magnets 8 and 9 are attracted to each other and the weight member 6 is screwed into the mounting hole 7. The weight member 6 can be prevented from falling off.

Golf club heads of the present invention, in order to facilitate removal of the weight member 6, as shown in FIG. 9, the other end surface of the weight member 6, provided with engagement holes 15 were widened part of the bottom Yes . By doing so, the substantially L-shaped extraction jig 16 is inserted into the engagement hole 15 (FIG. 10A), and the extraction jig 16 is rotated to engage the leading end portion with the widening portion 17. (FIG. 10 (b)), the weight member 6 can be easily pulled out of the mounting hole 7 (FIG. 10 (c)).

  Since the golf club head of the present invention uses the magnets 8 and 9, a magnetic material such as iron sand is adsorbed during play, which may cause a decrease in magnetic force and deterioration in appearance. Therefore, it is desirable to cover at least the surfaces of the magnets 8 and 9, preferably the entire weight member 6 and the mounting hole 7, with a thin plastic film in advance so that the adsorbed magnetic body can be easily removed.

DESCRIPTION OF SYMBOLS 1 Face part 2 Crown part 3 Sole part 4 Hosel 5 Head main body 6 Weight member 7 Mounting hole 8 Magnet of (mounting hole) Magnet 10 (Weight member) Magnet 10 Radial direction groove 11 Vertical groove 12 Projection part 13 Male thread part 14 Female Screw part 15 Engagement hole 16 Pull-out jig 17 Widened part

Claims (4)

Provided with a mounting hole (7) to the head main body having a hollow structure (5), the golf club head with a weight member (6) which is mounted to the mounting hole (7) in,
Magnets (8, 9) are respectively attached to the bottom surface of the mounting hole (7) and one end surface of the weight member (6) that comes into contact with the bottom surface when mounted, and at least one set is attached to the surface of the magnet (8, 9). N while the so-pole and S-pole appears in,
The weight member (6) is provided with an engagement hole (15) having a part of the bottom widened on the other end surface, and a substantially L-shaped portion with a distal end engaged with the widened part (17) of the engagement hole (15). Golf club head provided with a drawing jig (16) . The golf club head according to claim 1, further comprising means for preventing the weight member (6) from falling out of the mounting hole (7) . The drop-off preventing means, a longitudinal groove (11) extending one end and the other end side of the weight member (6), wherein formed in the opening portion of the mounting hole (7), wherein the longitudinal grooves (11) The golf club head according to claim 2, comprising a protrusion (12) to be fitted. The golf club head according to claim 1, wherein at least a surface of the magnet (8, 9) is covered with a plastic film.

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