JPH11244430A - Iron head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To facilitate production of an iron head which is hardly breakable and is usable for a long period by installing weight members to a part of the front surface of a sole wall part forming the lower edge of a recessed part or the entire part thereof. SOLUTION: The iron head has a head body A having the recessed part 1 on the rear surface side of the head. The weight members 9, 9 are installed to a part of the rear surface 5 of the sole wall part 3 forming the lower edge of the recessed part 1. The iron head is designed to a low centroid while the sweat area is expanded. In addition, the weight members 9, 9 are disposed on the front surface 5 side of the sole wall part 3, by which these members are made contactless from a ground contact surface S. Since the iron head does not receive external force directly from the ground contact surface S, the desorption from the fitting recessed parts 8, 8 does not arise any more. Further, there is no worry about the damage by the wear of the weight members 9, 9 and, therefore, the degree of freedom in selecting metallic materials constituting the weight members 9 is widened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to an unhead.

[0002]

2. Description of the Related Art As shown in FIG. 6, a conventional iron head (a so-called cavity-back type iron head) having a concave recess b on the back surface side of a face wall portion a is provided with a back surface e of the face wall portion a. In most cases, the angle α formed between the sole wall c and the upper surface d is an obtuse angle of 90 ° or more. Recently, with the improvement of manufacturing technology, FIG.
As shown in the figure, an iron head having an undercut shape in which the angle α formed between the back surface e of the face wall portion a and the upper surface d of the sole wall portion c is an acute angle of less than 90 ° is manufactured.

In this conventional undercut iron head, the volume of the concave portion b is increased and the thickness distribution of the head is dispersed to the periphery, thereby increasing the moment of inertia around the center of gravity of the head. It had a function to widen the sweet area and reduce the distance of the ball and the poor directionality due to a golfer's hitting mistake.

[0004] By the way, in the iron head, the position of the center of gravity being low makes it easy to hit the ball high when hitting the ball. In other words, it is more difficult for a general golfer to launch a ball higher as an iron club having a smaller loft angle called a long iron and a longer club length, and it is more difficult to increase the flight distance. By lowering the ball height, the ball can be launched higher. However, in an iron head having an undercut shape (FIG. 7),
Since the weight of the sole wall c decreases and the position of the center of gravity of the head increases, the weight member h is fitted to the fitting recess g provided on the bottom surface f of the sole wall c.
(Brass, copper alloy, tungsten, etc.) is fitted to lower the center of gravity of the head. Alternatively, a weight member having a higher specific gravity is sandwiched between the weight member h and the fitting concave portion g. For example, if the head is stainless steel or a titanium alloy, tungsten or lead having a large specific gravity is sandwiched between the brass weight member h and the fitting recess g.

[0005]

However, the iron club shown in FIG. 7 has a configuration in which the weight member h made of a dissimilar metal is fitted into the bottom surface f of the sole wall portion c. There was a problem that it was complicated and the manufacturing cost was high. Further, since the weight member h is exposed on the bottom surface f side of the sole wall portion c, the external force from the ground contact surface k is directly received and the weight member h is easily detached from the fitting recess g. h
In the case where is made of a soft metal, there is a problem that the exposed surface of the weight member h is scraped off (damaged) due to earth and sand wear.

Accordingly, an object of the present invention is to provide an iron head which is easy to manufacture, hardly damaged, and can be used for a long time.

[0007]

In order to achieve the above object, an iron head according to the present invention comprises an iron head having a concave portion on the back side of the head. A weight member is provided on a part or the entire upper surface of the wall.

Further, a weight member is fitted into a fitting concave or a concave groove formed on the upper surface of the sole wall. The angle formed between the back surface of the face wall and the upper surface of the sole wall is set to less than 90 °.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing embodiments.

FIGS. 1 and 2 show an embodiment (first embodiment) of an iron head according to the present invention. This iron head has a concave portion 1 (so-called cavity back structure) on the back side of the head. A weight member 9 is attached to a part of the upper surface 5 of a sole wall 3 which includes a head main body A and forms a lower edge of the concave recess 1. Reference numeral 2 denotes a face wall of the head body A.

More specifically, the iron head comprises a back surface 4 of the face wall 2 and an upper surface 5 of the sole wall 3.
Is formed in a so-called undercut shape in which the angle θ (see FIG. 4) is set to less than 90 °.

On the upper surface 5 of the sole wall portion 3, near the toe portion 6 and near the heel portion 7, fitting recesses 8, 8 which are deeper toward the face wall portion 2 are formed. The weight members 9, 9 (for example, heavy metals such as brass, copper alloy, tungsten, and lead) formed in a shape corresponding to the concave portions 8, 8 are bonded to the fitting concave portions 8, 8 by bonding or caulking. Are fitted (joined). At this time, the upper surfaces 10, 10 of the joined weight members 9, 9 and the upper surface 5 of the sole wall portion 3 are flush with each other.

The iron head of the present invention thus configured is designed to have a low center of gravity while enlarging the sweet area, and the weight members 9, 9 are arranged on the upper surface 5 side of the sole wall portion 3. Non-contact from the ground plane S,
Since no external force is directly applied from the ground contact surface S by the swing, it does not come off from the fitting concave portions 8. Further, since there is no fear of damage due to wear of the weight members 9, 9, a metal material (heavy metal) constituting the weight members 9 is used.
The degree of freedom of choice increases. That is, the weight member 9 made of a soft metal can be used.

In a state where the iron club is normally addressed to the ground plane S, the weight member 9 is disposed at a position lower than the center of gravity of the iron head.

FIG. 3 shows a second embodiment of the iron head according to the present invention, in which a weight member 9 is attached to the entire upper surface of the sole wall 3.
That is, a fitting recess 8 is formed on the entire upper surface of the sole wall portion 3 of the head body A, and the weight member 9 formed in a shape corresponding to the fitting recess 8 is bonded, swaged, screwed, or the like. It is fixed to the fitting recess 8.

FIG. 4 shows a third embodiment. In this iron head, a fitting groove 11 having a V-shaped cross section is formed in the upper surface 5 of the sole wall 3 on the side of the face wall 2. In addition, a weight member 9 having a triangular cross section is fitted into the fitting concave groove 11 by bonding or plastic deformation (caulking or press-fitting). In this case, the weight member 9 and the fitting groove 11
And the bonding area of the weight member 9 is increased (the adhesion is good), and the bonding strength of the weight member 9 is increased (it is difficult to separate).

FIG. 5 shows a fourth embodiment. In this iron head, a fitting concave groove 11 having a U-shaped cross section is formed on the face wall 2 side of the upper surface 5 of the sole wall 3. At the same time, a weight member 9 having a rectangular cross section is fitted into the fitting concave groove 11 by bonding, plastic deformation, or the like.
In this case, the joint area between the weight member 9 and the fitting groove 11 is further increased, and the joint strength of the weight member 9 is further increased.

In the case of the iron head described with reference to FIGS. 4 and 5, the fitting grooves 11 may be formed near the toe portion and / or near the heel portion to fix the weight members 9, 9 (see FIG. 2). ). Alternatively, one fitting groove 11 from the toe portion to the heel portion may be formed to fix the weight member 9 (see FIG. 3). In this case, for example, in order to set the center of gravity of the head to the toe portion side, the front-rear width and the vertical depth of the fitting concave groove 11,
The weight member 9 is formed larger toward the toe portion.
May be formed in a shape corresponding to the fitting concave groove 11 and fitted.

The present invention is not limited to the above-described embodiment. For example, the weight member 9 may be provided on the upper surface 5 of the sole wall 3.
May be closed with a cover member (not shown). That is, the present invention is also applicable to the hollow head body A. Further, the fitting recess 8 and the fitting recess groove 11 on the upper surface 5 of the sole wall portion 3 are omitted, and the weight member 9 is directly bonded to the upper surface 5 of the sole wall portion 3 and the back surface 4 of the face wall portion 2 by bonding or welding. It may be fixed.

[0020]

Since the present invention is configured as described above, the following effects can be obtained.

(According to claim 1), it is easy to manufacture,
Manufacturing costs are reduced. In addition, since the weight member 9 is disposed on the upper surface 5 side of the sole wall portion 3, the weight member 9 does not come into contact with the ground surface S at the time of swing, so that the weight member 9 is not directly subjected to external force, and the weight member 9 is fitted. Since the weight member 9 is not detached from the joint concave portion 8 and the weight member 9 is not damaged due to earth and sand wear, the function as an iron head can be maintained and used for a long time. Further, since there is no need to worry about earth and sand abrasion of the weight member 9 at the design stage, the metal material (heavy metal) constituting the weight member 9 can be freely selected (for example, a soft material having a relative importance). .

(According to the second aspect) The weight member 9 can be firmly fixed to the sole wall portion 3, and it becomes more difficult to separate. By adopting a so-called undercut shape, the moment of inertia around the center of gravity of the head is increased, and the sweet area is widened to reduce the flight distance and poor directionality due to a golfer's hitting mistake. An iron head having a function of relaxing can be obtained.

[Brief description of the drawings]

FIG. 1 is a cross-sectional side view showing a first embodiment of an iron head according to the present invention.

FIG. 2 is an explanatory view showing a state in which a weight member is attached to a fitting recess.

FIG. 3 is a rear view showing the second embodiment.

FIG. 4 is a cross-sectional side view showing a third embodiment.

FIG. 5 is a cross-sectional side view showing a fourth embodiment.

FIG. 6 is a cross-sectional side view showing a conventional example.

FIG. 7 is a sectional side view showing another conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concave concave part 2 Face wall part 3 Sole wall part 4 Back surface 5 Top surface 8 Fitting concave part 9 Weight member 11 Fitting concave groove θ angle

Claims (3)

[Claims] 1. An iron head having a concave portion 1 on the back side of a head, a weight member 9 is attached to a part or entire surface of an upper surface 5 of a sole wall portion 3 forming a lower edge of the concave portion 1. Iron head characterized by doing. 2. The iron head according to claim 1, wherein a weight member is fitted into the fitting concave portion or the fitting concave groove formed on the upper surface of the sole wall portion. 3. The back surface 4 of the face wall portion 2 and the sole wall portion 3.
3. The iron head according to claim 1, wherein an angle θ formed with the upper surface 5 is set to less than 90 °. 4.