JPH0562280U - Golf club head - Google Patents

Abstract

(57) [Summary] [Object] To provide a golf club head which has excellent workability in assembling and which can prevent the sole plate from peeling due to impact. [Structure] A recess 3 into which a sole plate 2 is fitted is formed on the bottom surface of a head body 1, and an engagement hole 4 is formed on the bottom surface of the recess.
The sole plate is provided with a projection 5 which is loosely fitted into an engagement hole on the bottom surface of the recess when the sole plate is fitted into the recess of the head body.
The sole plate is fixed to the recess of the head main body with the adhesive 6, and the gap between the engagement hole and the protrusion on the bottom of the recess is filled with the adhesive.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a golf club head, and more particularly to a structure for attaching a sole plate to a head body.

[0002]

[Prior Art]

 Conventionally, in golf club heads in which the head body and the sole plate are formed separately, it is common to fix the sole plate to the bottom surface of the head body by screwing, but in recent years, the sole plate has been used. A method of adhering to the bottom surface of the main body with an adhesive is also being discussed.

[0003]

[Problems to be solved by the device]

 However, in the case of screwing, there are drawbacks that the number of head components increases and that it takes time to form a screw hole and attach a screw. On the other hand, when the sole plate is bonded to the bottom surface of the head body with an adhesive, a strong shearing force is applied to the joint surface between the head body and the sole plate due to the impact when the head collides with the ground, and the sole plate is peeled off. There was a risk of it getting lost.

Therefore, an object of the present invention is to provide a golf club head which has excellent workability in assembling and can prevent the sole plate from peeling off due to an impact.

[0005]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention forms a recess on the bottom surface of a head body into which a sole plate fits, an engaging hole is formed on the bottom surface of the recess, and the sole plate includes the sole plate. When the plate is fitted into the recess of the head body, a protrusion is formed that loosely fits into the engaging hole on the bottom surface of the recess, and the sole plate is fixed to the recess of the head body with adhesive and A golf club head characterized in that a gap between an engagement hole and a protrusion is filled with the adhesive.

According to the above configuration, the sole plate is fitted in the recess of the head body and adhered by the adhesive, and the projection of the sole plate loosely fits in the engaging hole formed in the recess. Since the gap between them is filled with adhesive, these fitting parts resist the shear impact force applied to the adhesive surface between the head body and the sole plate, and the sole plate peels from the adhesive surface. Can be prevented. Therefore, screwing is not required, and the sole plate can be easily fixed to the head main body only by the adhesive bonding process.

Preferably, a fitting portion between the engagement hole and the protrusion is provided near the leading edge of the face surface of the head body. Since the shearing impact force between the head body and the sole plate is strong especially on the leading edge side of the face surface of the head body, the above-mentioned peeling is caused by arranging the fitting portion of the engaging hole and the protrusion in the vicinity thereof. Preventive effect is further enhanced.

Further, preferably, a plurality of fitting portions between the engagement hole and the protrusion are provided. This can more effectively prevent separation due to rotation of the sole plate.

More preferably, a head larger than the root is formed at the tip of the protrusion. This makes it difficult for the protrusion to come off from the engaging hole of the head main body, and the above-mentioned peeling prevention effect is further enhanced.

[0010]

【Example】

 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 6 show an embodiment of the present invention. Referring to these drawings, the golf club head has a hollow head body 1 and a sole plate 2. A recess 3 into which the sole plate 2 is fitted is formed on the bottom surface of the head body 1, and two bottomed engagement holes 4 are further formed on the bottom surface of the recess 3. The engagement hole 4 is provided near the leading edge of the face surface 1 a of the head body 1. Corresponding to these two engaging holes 4, as shown in FIGS. 5 and 6, the sole plate 2 is recessed when the sole plate 2 is fitted into the recess 3 of the head body 1. Protrusions 5 that are loosely fitted in the engaging holes 4 on the bottom surface are formed. Then, the sole plate 2 is fitted in the recess 3 of the head body 1, the sole plate 2 and the head body 1 are fixed by the adhesive 6, and the gap between the engaging hole 4 and the protrusion 5 is bonded. The golf club head is completed in the state of being filled with the agent 6.

According to the above configuration, the sole plate 2 is fitted into the recess 3 of the head body 1 and is adhered thereto with the adhesive 6, and the sole plate 2 is further fitted into the engaging hole 4 formed in the recess 3. Since the protrusions 5 are loosely fitted and the gap between them is filled with the adhesive 6, these fitting parts are not affected by the shear impact force applied to the bonding surface between the head body 1 and the sole plate 2. It is possible to resist and prevent the sole plate 2 from peeling off from the adhesive surface. Therefore, screwing becomes unnecessary, and the sole plate 2 can be easily fixed to the head main body 2 only by the step of adhering with the adhesive 6. Generally, the shearing impact force between the head body 1 and the sole plate 2 is strongly generated especially on the leading edge side of the face surface 1a of the head body 1, but in this embodiment, the engagement hole 4 and the protrusion 5 are fitted together. Since the portion is provided in the vicinity of the leading edge of the face surface 1a of the head body 1, the effect of preventing the sole plate 2 from peeling is further enhanced. Further, since a plurality of fitting portions (two here) are provided between the engagement holes 4 and the projections 5, the sole plate 2 can be more effectively prevented from being peeled off due to rotation.

The head body 1 of the golf club head having the above-described structure is made of a fiber reinforced plastic obtained by appropriately mixing long carbon fibers, glass fibers, etc. in a thermosetting resin such as ABS, polycarbonate, etc., and is formed by molding. However, it is also possible to use other materials, for example, a fiber reinforced resin having a matrix of vinyl ester, epoxy, or the like. Further, the sole plate 2 is made of polyarylate as a resin having excellent wear resistance and slipperiness and high strength, and is formed by molding, but it may be made of another material having similar properties. ..

As shown in FIGS. 2 and 3, on the rear side and the heel side of the head body 1, weight bodies 7, 8 and 9 are integrally provided inside by insert molding. These weight bodies 7, 8 and 9 are not exposed on the outer surface of the head body 1, but are insert-molded on the head body 1 while being exposed on the inner surface of the hollow portion of the head body 1. Since these weight bodies 7, 8 and 9 are embedded in a direction substantially orthogonal to the ball striking direction of the head body 1, the weight bodies 7, 8 and 9 are separated from the wall portion of the head body 1 by the impact at the time of hitting the ball. Less likely. The hollow portion of the head body 1 may be filled with a lightweight foam material (not shown). In this case, the filled foam material prevents the weight bodies 7, 8 and 9 from coming off more reliably. The Rukoto. As shown in FIGS. 3 and 4, a weight body accommodating hole 10 that opens into the recess 3 is formed on the toe side of the head body 1. Since a weight body having a required weight can be attached to the accommodation hole 10 as needed, the weight balance can be easily adjusted. Further, by disposing the weight bodies 7, 8 and 9 along the peripheral surface of the head body 1 as in the illustrated embodiment, the polar moment of inertia around the center of gravity of the head can be increased, so that the ball jumps. The direction of is improved.

As shown in FIGS. 2 and 3, between the face wall and the rear wall of the head body 1, a power bridge rod 11 for applying a high repulsive force to the face wall is installed by insert molding. .. It is preferable that the power bridge rod 11 is formed of a member having high compressive strength, which is formed by bundling long fibers such as glass and carbon and solidifying them with resin.

A shaft mounting hole 1c is formed in the neck portion 1b of the head body 1, and a reinforcing pipe 12 made of a metal such as aluminum is embedded in the mounting hole 1c by insert molding. The hole 12a is a through hole through which a pin (not shown) for fixing the shaft and the neck portion 1b of the head body 1 is inserted.

8 and 9 show a molding core 13 for molding the head main body 1 having the above-described structure. The core 13 is made of a metal having a low melting point which melts at a temperature of 400 to 500 ° C. The power bridge rod 11 and the weights 7, 8 and 9 described above are incorporated in the core 13. Then, the core 13 is set in a mold (not shown), and the fiber reinforced resin to be the head main body 1 is injected and solidified. Then, the core 13 is melted and taken out from the mold to obtain the head main body 1 having the above-mentioned structure Be done. The plurality of through holes 14 appearing in FIG. 1 are holes formed by a support body that supports the core 13 in the mold. These through holes 14 are formed by melting the core 13 and It is also used when exporting to the outside.

FIG. 7 shows another embodiment of the present invention in which the protrusion 5 of the sole plate 2 is modified. That is, in this embodiment, the head portion 5a larger than the root portion is formed at the tip of the protrusion 5. By forming the protrusion 5 in such a shape, the protrusion 5 is less likely to come off from the engagement hole 4 of the head body 1, and the effect of preventing the sole plate 2 from peeling is further enhanced.

FIG. 10 shows a modification of the metal reinforcing pipe 12 provided on the neck portion 1b of the head body 1. The reinforcing pipe 12 of this embodiment is tapered in a curve shape toward the tip, and an axial slit 12a is formed on the tip side. When the reinforcing pipe 12 is inserted into the shaft mounting hole 1c of the neck portion 1b and fixed, and then the shaft is inserted, the tip side of the reinforcing pipe 12 expands and presses against the inner surface of the mounting hole 1c. Since there is no step at the joint with the neck portion 1b, the risk of neck breakage due to stress concentration is reduced.

FIG. 11 shows another modification of the reinforcing pipe 12. In this embodiment, since the outer peripheral surface 12b of the reinforcing pipe 12 is made uneven by knurling, the coupling strength of the reinforcing pipe 12 to the neck portion 1b of the head body 1 is increased. In general, the head tends to rotate around the axis of the shaft when hitting a ball. Therefore, by knurling the reinforcing pipe 12 in this way, it is possible to prevent separation between the neck portion 1b and the reinforcing pipe 12. ..

Although some embodiments have been described above, the present invention is not limited to the above-mentioned embodiments, and each configuration is within the scope of the invention described in the claims for utility model registration. Further changes can be made to the element. For example, it is easy to change the shapes of the sole plate 2 and the recess 3, and the shapes, positions, and numbers of the engaging holes 4, the projections 5, the weight bodies 7, 8, 9 and the power bridge rod 11, etc. is there. Further, the illustrated embodiment is a case where the present invention is applied to a so-called wood club head, but the present invention can be similarly applied to an iron club head.

[0022]

[Effect of the device]

 As is apparent from the above description, according to the present invention, the sole plate is fitted in the recess of the head body and adhered with the adhesive, and the protrusion of the sole plate is loosened in the engaging hole formed in the recess. Since they are fitted and the gap between them is filled with an adhesive, these fitting parts resist the shearing impact force applied to the adhesive surface between the head body and the sole plate, and the sole from the adhesive surface The peeling of the plate can be prevented. Therefore, screwing is not required, and the sole plate can be easily fixed to the head main body only by the adhesive bonding step, so that the assembling workability is excellent and the sole plate can be prevented from peeling due to impact. Can be provided.

[Brief description of drawings]

FIG. 1 is a bottom view of a head body of a golf club head showing an embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view of the golf club head.

FIG. 3 is a partial horizontal cross-sectional plan view of the golf club head.

FIG. 4 is a vertical sectional front view of the golf club head.

FIG. 5 is a vertical cross-sectional front view of essential parts of the golf club head.

FIG. 6 is a plan view of a sole plate of the golf club head.

FIG. 7 is a vertical sectional front view of a main part of a golf club head showing another embodiment of the present invention.

FIG. 8 is a vertical cross-sectional side view of a core used when molding the head body of the golf club head.

9 is a front view of the core shown in FIG. 8. FIG.

FIG. 10 is a partial vertical sectional front view of a neck portion of a golf club head showing another embodiment of the present invention.

FIG. 11 is a schematic end view of a neck portion of a golf club head showing still another embodiment of the present invention.

[Explanation of symbols]

 1 Head Main Body 1a Face Surface 1b Neck Part 1c Shaft Mounting Hole 2 Sole Plate 3 Recess 4 Engagement Hole 5 Protrusion 5a Head 6 Adhesive 7, 8, 9, Weight 11 Power Bridge Rod 12 Reinforcement Pipe

Claims (4)

[Scope of utility model registration request] 1. A recess in which a sole plate is fitted is formed on a bottom surface of a head main body, an engaging hole is formed on a bottom surface of the recess, and the sole plate is formed in a recess of the head main body. A protrusion is formed that loosely fits into the engagement hole on the bottom surface of the recess when fitted, and the sole plate is fixed to the recess of the head body with an adhesive, and the gap between the engagement hole and the protrusion is formed. A golf club head, wherein a golf club head is filled with the adhesive. 2. The golf club head according to claim 1, wherein a fitting portion between the engagement hole and the protrusion is provided near a leading edge of a face surface of the head body. 3. The golf club head according to claim 1, wherein a plurality of fitting portions for fitting the engagement holes and the protrusions are provided. 4. The golf club head according to claim 1, wherein a head larger than a root portion is formed at a tip of the protrusion.