JP3074598U - Golf club head - Google Patents

Abstract

(57) [Problem] To provide a golf club head having high accuracy in shape and weight. A golf club head (10) has a shell (2).
0, a neck tube 30 and a panel body 40. The shell 20 is made of a metal casting, is hollow, and has a heel 201,
It has a toe 202, a crown 203, a sole 204 and a back 205, and an opening 21 is provided in the front. Tube seat 2 at the position corresponding to heel 201 on crown 203
2 are provided. The through hole extends from the tube seat 22 to the shell 20.
Formed inward. The neck tube 30 is manufactured by machining a metal material, and is inserted into a through hole of the shell 20. The inner end of the neck tube 30 extends to the inside of the shell 20, and the outer end is exposed to form a neck of the head 10 together with the tube seat 22. The neck tube 30 has an insertion hole 31. The panel plate 40 is formed by forging or pressing a metal, and is welded so as to cover the opening 21.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a golf club head.

[0002]

[Prior art]

 A method of manufacturing a metal golf club head which is often used at present is to weld two or three shells to form a hollow head. For example, Japanese Patent Application Laid-Open Nos. -317466, and Patent No. 3009833. Since the head manufactured by such a manufacturing method is manufactured by welding a plurality of shells, the shape of the completed product is displaced and deformed. Therefore, recently, for example, an improved structure as shown in FIG. 1 has appeared. In this method, a hollow shell 91 having a head body shape is integrally formed by a dewaxing casting method, and a panel plate 92 for hitting a ball is welded to a front opening 93 of the shell 91 to form a hollow head. is there. The shell 91 is cast only once, and the shape is more stable than before.

[0003] Inside the shell 91, there is an extension post 95 corresponding to the neck 94 of the head, and the shaft rod of the golf club is fitted (or screwed) deeper in order to secure joint strength. As a casting technique, generally, the injection port selects a complex part with a casting shape. When casting the shell 91, the molten metal liquid is injected from the heel of the head. After the shell 91 is formed, it is polished or modified in an orderly manner.

[0004]

[Problems to be solved by the invention]

 However, it is not easy to remove the casting sand or the metal bump 96 between the extension column inside the head of the conventional golf club described above and the shell wall, so that the casting sand or the metal bump 96 becomes an extra weight. In addition, the weight distribution of the head is destroyed, and the accuracy of the head is reduced. Accordingly, it is a primary object of the present invention to provide a golf club head having high accuracy in shape and weight.

[0005]

[Means for Solving the Problems]

 A golf club head according to the present invention for achieving the above object includes a shell, a neck tube and a panel. The shell is made by casting metal, has a substantially head shape and is hollow, and has a heel, a toe, a crown, a sole, and a back portion on the outside thereof, and corresponds to the front side of the swing, that is, the front side of the head. An opening is set up in the place where it was. A tube seat protrudes from the crown corresponding to the heel. The through hole is formed so as to penetrate from the tube seat to the inside of the shell. The neck tube is manufactured by machining using a metal material and is inserted into the through hole of the shell and tightened. The inner end of the neck tube extends to the inside of the shell, the outer end is exposed and forms the neck of the head with the tube seat. The neck tube has an insertion hole extending from the outside to the inside. Further, the panel plate for hitting the ball is formed by forging or pressing a metal, and is welded to the opening so as to correspond to the opening in the front of the shell and cover the opening.

[0006]

[Embodiment of the invention]

 Hereinafter, embodiments of the present invention will be described with reference to the drawings. (First Embodiment) First, FIGS. 2 to 4 show a first embodiment of the present invention. The golf club head 10 according to the first embodiment includes a shell 20, a neck tube 30, and a panel plate for hitting a ball.

The shell 20 is made of stainless steel, is integrally formed by a dewaxing casting method, and is hollow. On its outside, it has the heel 201, toe 202, crown 203, sole 204 and back 205 of the head. An opening 21 is provided at a position corresponding to the front of the head. In the crown 203, a substantially flat cylindrical tube seat 22 protrudes obliquely upward at a position corresponding to the heel 201 (that is, at the neck position of the general head). The through hole 23 is formed so as to penetrate from the tube seat 22 to the inside of the shell 20. The cross section of the through hole 23 is substantially circular, and there is a flat surface 24 on one side of the hole wall. A transmission hole 25 is formed at the center of the back 205 of the shell 20. An annular flange 26 is formed on the inner wall surface of the shell 20 at the periphery of the transmission hole 25. The through hole 25 has an outwardly facing annular shoulder surface 27, the inner surface of which comes into contact with the shoulder surface 27 when the correspondingly shaped ped flake 28 is welded to the permeable hole 25. . The surface of the pedicle 28, when modified, becomes integral with the back of the shell. In the casting process, the permeation hole 25 has the same shape as the hole provided for the flow of the sand paste as a design of the shell brazing die. The flange 26 is manufactured by increasing the peripheral edge thickness of the shell for flowing the sand paste to form the shoulder surface 27 in order to prevent the deformation of the brazing die.

The neck tube 30 is manufactured by machining using a metal material, and has an insertion hole 31 penetrating along the diameter direction. A large diameter portion 32 is formed at one end of the neck tube 30. The large diameter portion 32 is conical and the inner end is roughly equal to the outer diameter of the tube seat 22 of the shell 20. In the middle of the neck tube 30 itself, there is a slightly thicker joint 33 near the large diameter portion 32. By providing the flat surface 34 on one side of the joint 33, the cross section of the joint 33 corresponds to the through hole 23 of the shell 20, and the neck tube 30 is inserted into the through hole 23 of the shell 20. The inner end of the neck tube 30 is extended to the inside of the shell 20, and the large-diameter portion 32 at the outer end is locked to the tube seat 22, and together with the tube seat 22, forms a head neck shape. The neck tube 30 is joined to the hole wall of the through hole 23 by the joining portion 33 and is fastened to the shell 20. In the present embodiment, there is a weld bonding layer 35 between the joint 33 and the hole wall of the through hole 23 in order to securely weld the neck tube 30 and the shell 20. The weld bonding layer 35 is formed by cooling and condensing a welding material (for example, a material based on a silver component) from a molten state. The joint 33, the through-hole 23, and the mutually engaged flat surfaces 34, 24 prevent the neck tube 30 from rotating out of position. This prevents the welded structure from being destroyed due to the torsional force when hitting the ball. Also, a joining method of screwing the neck tube 30 into the shell is possible, but care must be taken in the direction of the screw. In that case, the torsional force generated when the ball is hit tightens the two instead of loosening them.

The panel board 40 for hitting the ball is made by forging (press forming) using a titanium alloy (which may be maraging steel or other metal material). Its shape is slightly larger than the front opening 21 of the shell 20 and is welded to the opening 21 so as to cover the opening 21 as shown in FIG. In this embodiment, there is a weld bonding layer 41 on the annular joint surface between the panel plate 40 and the shell 20. Inside the shell 20, an annular welded bar 42 having a substantially triangular cross section is formed at the edge of the opening 21. The annular welding connection bar 42 has a concave side at the hypotenuse, and the other two sides are welded to the shell and the panel plate, respectively. The welding connection layer 41 and the welding connection bar 42 are formed by cooling and condensing a welding material from a molten state. As a manufacturing method, first, the panel plate 40 is put on the shell 20 and positioned. Then, apply a paste-like welding material along the seam on the surface of the head and heat it in a high-temperature oven. As a result, when the welding material melts and bleeds, cools, and congeals, it forms a weld bond layer 41 and a weld bond bar 42. As an actual operation, the shell 20, the neck tube 30, the panel plate 40, and the pad plate of the present embodiment employ the above-described welding method, and the welding is completed at the same time.

The golf club head 10 formed by the above-described structure uses the insertion hole 31 of the neck tube 30 to insert and connect the shaft rod of the golf club. The shaft rod and the golf club head 10 have a long and large joint so that a strong and firm connection can be achieved. In this embodiment, since the shell 20 is cast only once, the shape is stable, and the accuracy of the produced head is high. With the current casting technology, the thickness of the shell 20 is only 0.55 mm 0.9 mm, so a large volume head body is constructed with the same weight limit, and the advantage of improving the inertia of the head and the area to hit the ball is improved. There is.

The most distinctive feature of this embodiment is that since the neck tube 30 and the shell 20 are separately manufactured and then joined together, the inside of the head is sufficiently clean, and the blind spot of the conventional structure described above is eliminated. There is no problem of remaining casting sand and metal residue. That is, the weight of the head according to the present embodiment is accurately controlled, and there is excellent completion. In this embodiment, the inner surface of the panel plate 40 for hitting a ball is flatly adhered to the shell 20, and the two are positioned before welding. As shown in FIG. 4, a plurality of positioning bars 29 are integrally formed around the periphery of the opening 21 of the shell 20. After the positioning bar 29 is bent by pressure, its tail end is hooked and welded to the peripheral edge of the panel plate 40, and then it is polished off.

(Second Embodiment) FIG. 5 shows a second embodiment of the present invention. In the second embodiment, the head 50 of the golf club is composed of the shell 51, the neck tube 52, the panel plate 53 for hitting the ball and the like in the same manner as the first embodiment. It is formed by a similar structure. The difference is that an annular groove 55 is provided on the outer edge of the opening 54 of the shell 51, and an annular protruding bar 56 corresponding to the annular groove 55 is provided on the peripheral edge of the rear surface of the panel plate 53. Since both are fitted with each other, the positioning can be performed on the shell 51 without the positioning bar in the first embodiment. Moreover, excellent bonding strength is obtained after welding and bonding.

Third Embodiment FIG. 6 shows a third embodiment of the present invention. As in the third embodiment, an annular protruding bar 63 may be provided on the periphery of the opening of the shell 61, and an annular groove 65 may be provided on the panel plate 64.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an exploded state of a conventional golf club head.

FIG. 2 is a perspective view showing a golf club head according to a first embodiment of the present invention;

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is an exploded perspective view illustrating a golf club head according to a first embodiment of the present invention;

FIG. 5 is a sectional view showing a golf club head according to a second embodiment of the present invention;

FIG. 6 is a cross-sectional view illustrating a golf club head according to a third embodiment of the present invention.

[Explanation of symbols]

 10, 50, 60 Golf club head 20, 51, 61 Shell 21, 54, 62 Opening 22 Tube seat 23 Through hole 30, 52 Neck tube 31 Insertion hole 40, 53, 64 Panel plate 201 Heel 202 Toe 203 Crown 204 Sole 205 back

Claims (8)

[Utility model registration claims] 1. A hollow, substantially head-shaped, heel, toe, crown, sole, and back portion having a tube seat at a location corresponding to the heel. A shell body is provided so as to protrude, has a through hole formed so as to penetrate from the tube seat to the inside, and has an opening formed on the front side of the swing. A neck tube having an insertion hole extending toward the inside, being inserted into the through hole and tightened, an inner end extending to the inside of the shell, and an outer end exposed to form a neck with the tube seat; Used to strike a ball, manufactured by forging or pressing of metal, corresponding to the opening of the shell, and welded to the opening to cover the opening The golf club head characterized in that it comprises the that panel board, the. 2. The tube seat has a substantially flat cylindrical shape, and the neck tube has a large-diameter portion fixed to the tube seat at an outer end, and the large-diameter portion has a conical inner shape. 2. The golf club head according to claim 1, wherein the end is rough and the inner end has an outer diameter equal to the outer diameter of the tube seat. 3. The through-hole has a substantially circular cross-section and a flat surface is formed on one side of the hole wall, and the neck tube has a shape in which a cross-section of a joint with the through-hole corresponds to the through-hole. 2. The golf club head according to claim 1, wherein: 4. The golf club head according to claim 1, wherein a welding connection layer formed by welding the neck tube and the shell is provided on a wall surface of the through hole of the shell. . 5. An annular groove is formed at an outer edge of the opening of the shell, and an annular protruding bar fitted into the annular groove is provided at a peripheral edge of a rear surface of the panel plate. 2. The golf club head according to 1. 6. An annular protruding bar is provided at a periphery of an opening of the shell, and an annular groove is formed in the panel plate so as to be fitted with the annular protruding bar. 2. The golf club head according to 1. 7. A welding joint layer for joining the panel plate and the shell to a joint surface between the panel plate and the shell, and an annular welding having a substantially triangular cross section inside the shell. A coupling bar is provided along the periphery of the opening;
The golf club according to claim 1, wherein the annular welding connection bar has a hypotenuse in a hypotenuse and two sides welded to the shell and the panel plate, respectively. head. 8. The golf club head according to claim 1, wherein a permeation hole is formed in a back portion of the shell, and a thin pad is fitted and welded into the permeation hole.