JP7433670B2 - headset - Google Patents

Description

The present invention relates to a headset including at least three heads for iron clubs with different counts.

An iron club set is composed of at least three iron clubs having different loft angles. The difference in loft angle is expressed as the count. The smaller the count, the smaller the loft angle. In addition, a small count is also called "low count." A large count is also called a "high count."

Patent Document 1 proposes that in such an iron club set, the center of gravity distance is set smaller as the iron club becomes lower (and larger as the iron club becomes higher). Here, the center of gravity distance is the distance from the center line of the shaft to the center of gravity of the face.

Patent Document 2 proposes setting the height of the center of gravity higher as the count increases. Here, the height of the center of gravity is the distance from the center to the leading edge. The center is the point where the face intersects a line drawn from the center of gravity to the face when looking at the club head from the toe side.

Japanese Patent Application Publication No. 9-271545 Japanese Patent Application Publication No. 8-112378

When hitting a ball using any one of the iron club sets described above, not all players find the shot easy. In other words, there are quite a few players who find it difficult to make shots.

The present invention aims to solve the above-mentioned problems.

According to an embodiment of the invention, a first head for a first iron club having a minimum iron club size, a second head for a second iron club having a larger iron club size than the first head, and a second head for a second iron club having a maximum iron club size. A third head for a third iron club, the headset comprising:
comprising a first weight and a second weight having a different mass from the first weight,
Each of the first head, the second head, and the third head has a sole part, a toe part, a heel part, a face part, and a neck part,
In each of the first head, the second head, and the third head, a linearly extending toe-side pocket is formed in a portion close to the toe portion, and the toe-side pocket is formed in a portion close to the toe portion. One or more weights selected from the weight and the second weight can be accommodated in a state arranged along the extending direction of the toe side pocket,
When the sole portion of each of the first head, the second head, and the third head extends along the horizontal direction, the extending direction of the toe side pocket is a direction inclined with respect to the horizontal direction. and
A headset is provided, in which an intersecting angle between the extending direction of the toe-side pocket and the horizontal direction increases in the order of the first head, the second head, and the third head.

In the present invention, it is possible to change the weight accommodated in the toe side pocket as appropriate. With this change, the height of the center of gravity or the distance between the centers of gravity of the first to third heads can be adjusted as desired. That is, the player can individually set the height or distance of the center of gravity of the first to third heads according to his/her preference. As a result, shots that satisfy various players can be obtained.

FIG. 1 is a front view of main parts of a first iron club including a first head. FIG. 2 is a rear view of the main parts of the first iron club. FIG. 3 is a side view of the main parts of the first iron club seen from the first toe portion of the first head. FIG. 4 is a front view of main parts of a second iron club including a second head. FIG. 5 is a rear view of the main parts of the second iron club. FIG. 6 is a side view of the main parts of the second iron club seen from the second toe portion of the second head. FIG. 7 is a front view of main parts of a third iron club including a third head. FIG. 8 is a rear view of the main parts of the third iron club. FIG. 9 is a side view of the main parts of the third iron club seen from the third toe portion of the third head. FIG. 10 is a chart showing the count, loft angle, intersecting angle between the toe side pocket and the horizontal direction, and neck length of the headset according to the example. FIG. 11 is a chart showing the arrangement of weights, the height of the center of gravity, and the distance of the center of gravity in the club set tried by the first player. FIG. 12 is a chart showing the arrangement of weights, the height of the center of gravity, and the distance of the center of gravity in the club set tried by the second player. FIG. 13 is a chart showing the arrangement of weights, the height of the center of gravity, and the distance of the center of gravity in the club set tried by the third player.

1 to 9 show a club set including a headset according to this embodiment. The club set includes at least a first iron club 10a shown in FIGS. 1 to 3, a second iron club 10b shown in FIGS. 4 to 6, and a third iron club 10c shown in FIGS. 7 to 9. The first iron club 10a to the third iron club 10c will be explained below. Note that in the second iron club 10b and the third iron club 10c, components corresponding to those of the first iron club 10a may only be briefly described.

FIG. 1 is a front view of the main parts of the first iron club 10a, and FIG. 2 is a rear view of the main parts of the first iron club 10a. The first iron club 10a includes a first head 12a and a first shaft 14a. The first head 12a has a first sole portion 16a, a first toe portion 18a, a first heel portion 20a, a first face portion 22a, a first back face portion 24a, and a first neck portion 26a. Note that FIG. 1 shows the first head 12a viewed from the first face portion 22a, and FIG. 2 shows the first head 12a viewed from the first back face portion 24a. The first iron club 10a is configured by attaching the first shaft 14a to the first neck portion 26a.

A horizontal line H shown in FIGS. 1 and 2 represents a line extending in the horizontal direction through the first sole portion 16a. At this time, the first neck portion 26a extends in a direction inclined with respect to the horizontal line H. The intersection angle α1 of the first neck portion 26a with respect to the horizontal line H is the lie angle at the first head 12a. Further, the length N1 from the upper end of the first neck portion 26a to the horizontal line H is defined as the length of the first neck portion 26a.

As shown in FIG. 2, the back of the first head 12a includes a first toe side thick part 28a adjacent to the first toe part 18a, and a first toe side thick part 28a adjacent to the first heel part 20a and the first sole part 16a. A heel side thick portion 30a is provided. The thickness of the first toe-side thick portion 28a and the thickness of the first heel-side thick portion 30a are larger than the thickness from the first face portion 22a to the first back face portion 24a.

A first toe side pocket 32a is formed in the first toe side thick portion 28a. The first toe-side pocket 32a is a bottomed hole shaped like a cylindrical body hollowed out from the first toe-side thick portion 28a. When the first sole portion 16a extends along the horizontal line H, the first toe side pocket 32a extends linearly in a direction inclined with respect to the horizontal line H. The first toe side pocket 32a and the horizontal line H intersect at an intersecting angle γ1. A female thread (not shown) is formed on the inner circumferential wall of the first toe-side pocket 32a near the opening.

A first window 36 and a second window 38 are formed in the first toe-side thick portion 28a. The first window 36 is closer to the first sole portion 16a than the second window 38 is. The first window 36 and the second window 38 penetrate to the first toe side pocket 32a. That is, the player can visually check the inside of the first toe side pocket 32a through the first window 36 and the second window 38.

A first heel side pocket 40a is formed in the first heel side thick portion 30a. The first heel-side pocket 40a is a bottomed hole shaped like a cylindrical body hollowed out from the first heel-side thick portion 30a. When the first sole portion 16a extends along the horizontal line H, the first heel side pocket 40a extends linearly substantially parallel to the horizontal line H. A female thread (not shown) is formed on the inner circumferential wall of the first heel side pocket 40a near the opening.

A third window 44 and a fourth window 46 are formed in the first heel side thick portion 30a. The third window 44 is closer to the first heel portion 20a than the fourth window 46 is. The third window 44 and the fourth window 46 penetrate to the first heel side pocket 40a. That is, the player can visually check the inside of the first heel side pocket 40a through the third window 44 and the fourth window 46.

FIG. 3 is a side view of the main part of the first iron club 10a viewed from the first toe portion 18a. A vertical line V shown in FIG. 3 represents a line extending along the vertical direction. FIG. 3 shows a state in which the first neck portion 26a and the first shaft 14a extend along the vertical line V. At this time, the first face portion 22a extends in a direction inclined with respect to the vertical line V. The intersection angle β1 of the first neck portion 26a with respect to the vertical line V is the loft angle of the first head 12a.

FIG. 4 is a front view of the main parts of the second iron club 10b, and FIG. 5 is a rear view of the main parts of the second iron club 10b. The second iron club 10b includes a second head 12b and a second shaft 14b. The second head 12b has a second sole portion 16b, a second toe portion 18b, a second heel portion 20b, a second face portion 22b, a second back face portion 24b, and a second neck portion 26b. The second iron club 10b is configured by attaching the second shaft 14b to the second neck portion 26b.

The intersection angle α2 of the second neck portion 26b with respect to the horizontal line H is the lie angle at the second head 12b. Further, the length N2 from the upper end of the second neck portion 26b to the horizontal line H represents the length of the second neck portion 26b.

As shown in FIG. 5, the back of the second head 12b includes a second toe side thick part 28b close to the second toe part 18b, and a second toe side thick part 28b close to the second heel part 20b and the second sole part 16b. A heel side thick portion 30b is provided. A second toe side pocket 32b having the same diameter and the same length as the first toe side pocket 32a is formed in the second toe side thick portion 28b. When the second sole portion 16b extends along the horizontal line H, the second toe side pocket 32b linearly extends in a direction inclined with respect to the horizontal line H. The second toe side pocket 32b and the horizontal line H intersect at an intersection angle γ2. A female thread (not shown) is formed on the inner circumferential wall of the second toe-side pocket 32b near the opening.

A second heel side pocket 40b having the same diameter and the same length as the first heel side pocket 40a is formed in the second heel side thick portion 30b. When the second sole portion 16b extends along the horizontal line H, the second heel side pocket 40b extends linearly substantially parallel to the horizontal line H. A female screw (not shown) is formed on the inner circumferential wall of the second heel side pocket 40b near the opening.

A first window 36 and a second window 38 are formed in the second toe side thick portion 28b. A third window 44 and a fourth window 46 are formed in the second heel side thick portion 30b.

FIG. 6 is a side view of the main parts of the second iron club 10b viewed from the second toe portion 18b. The intersection angle β2 of the second neck portion 26b with respect to the vertical line V is the loft angle of the second head 12b.

FIG. 7 is a front view of the main parts of the third iron club 10c, and FIG. 8 is a rear view of the main parts of the third iron club 10c. The third iron club 10c includes a third head 12c and a third shaft 14c. The third head 12c has a third sole portion 16c, a third toe portion 18c, a third heel portion 20c, a third face portion 22c, a third back face portion 24c, and a third neck portion 26c. The third iron club 10c is configured by attaching the third shaft 14c to the third neck portion 26c.

The intersection angle α3 of the third neck portion 26c with respect to the horizontal line H is the lie angle of the third head 12c. Further, the length N3 from the upper end of the third neck portion 26c to the horizontal line H represents the length of the third neck portion 26c.

As shown in FIG. 8, the back of the third head 12c includes a third toe side thick portion 28c adjacent to the third toe portion 18c, and a third toe side thick portion 28c adjacent to the third heel portion 20c and third sole portion 16c. A heel side thick portion 30c is provided. A third toe side pocket 32c having the same diameter and the same length as the first toe side pocket 32a and the second toe side pocket 32b is formed in the third toe side thick portion 28c. When the third sole portion 16c extends along the horizontal line H, the third toe side pocket 32c linearly extends in a direction inclined with respect to the horizontal line H. The third toe side pocket 32c and the horizontal line H intersect at an intersecting angle γ3. A female thread (not shown) is formed on the inner circumferential wall of the third toe side pocket 32c near the opening.

A third heel side pocket 40c having the same diameter and length as the first heel side pocket 40a and the second heel side pocket 40b is formed in the third heel side thick portion 30c. When the third sole portion 16c extends along the horizontal line H, the third heel side pocket 40c extends linearly substantially parallel to the horizontal line H. A female screw (not shown) is formed on the inner circumferential wall of the third heel side pocket 40c near the opening.

A first window 36 and a second window 38 are formed in the third toe side thick portion 28c. A third window 44 and a fourth window 46 are formed in the third heel side thick portion 30c.

FIG. 9 is a side view of the main parts of the third iron club 10c viewed from the third toe portion 18c. The intersection angle β3 of the third neck portion 26c with respect to the vertical line V is the loft angle of the third head 12c.

The headset according to the present embodiment includes at least three iron club heads, the first head 12a, the second head 12b, and the third head 12c described above. The number increases in the order of the first head 12a, the second head 12b, and the third head 12c. That is, the number of the first head 12a is the smallest among the three, and the number of the third head 12c is the largest among the three. The number of the second head 12b is between the number of the first head 12a and the number of the third head 12c. Examples of the numbers of the first head 12a, second head 12b, and third head 12c are number 5, number 8, and number 11, respectively.

However, the respective counts of the first head 12a, the second head 12b, and the third head 12c are not particularly limited to this example. The headset may include another head with a count between the first head 12a and the second head 12b. The headset may include another head with a count between the second head 12b and the third head 12c. When the first head 12a is, for example, the seventh head, the headset may include the fifth or sixth head. When the third head 12c is, for example, the ninth head, the headset may include the tenth or eleventh head.

The first head 12a to the third head 12c are manufactured, for example, by precision casting using molten metal. Specific examples of the metal that becomes the molten metal include stainless steel, titanium, and the like. In precision casting, the first toe-side thick portion 28a to third toe-side thick portion 28c and the first heel-side thick portion 30a to third heel-side thick portion 30c are molded. At the same time, a first toe side pocket 32a to a third toe side pocket 32c, a first window 36, and a second window 38 are formed in the first toe side thick part 28a to the third toe side thick part 28c, respectively. Further, a first heel side pocket 40a to a third heel side pocket 40c, a third window 44, and a fourth window 46 are formed in the first heel side thick part 30a to the third heel side thick part 30c, respectively.

In the above configuration, when comparing the sizes of loft angle β1 (see Fig. 3), loft angle β2 (see Fig. 6), and loft angle β3 (see Fig. 9), it is found that loft angle β1, loft angle β2, and loft angle β3 are increasing in order. That is, the higher the count, the higher the loft angle.

Also, when comparing the magnitudes of crossing angle γ1 (see Figure 2), crossing angle γ2 (see Figure 5), and crossing angle γ3 (see Figure 8), it is found that crossing angle γ1, crossing angle γ2, and crossing angle γ3 are higher in the order. It becomes an angle. In other words, in the first head 12a to the third head 12c, as the count and the loft angle increase, the intersection angle between each extending direction of the first toe side pocket 32a to the third toe side pocket 32c and the horizontal line H increases. becomes larger. That is, the following relationship holds true.
Intersection angle γ1<intersection angle γ2<intersection angle γ3

Furthermore, in this embodiment, the length N1 of the first neck portion 26a (see FIG. 1), the length N2 of the second neck portion 26b (see FIG. 4), and the length N3 of the third neck portion 26c (see FIG. 7) are explained. ), the length N1 of the first neck portion 26a becomes larger, the length N2 of the second neck portion 26b increases, and the length N3 of the third neck portion 26c increases in that order. That is, the following relationship holds true.
Length N1 of the first neck portion 26a<Length N2 of the second neck portion 26b<Length N3 of the third neck portion 26c

Additionally, in this embodiment, as the count increases, the heel side pocket moves closer to the toe side. That is, the distance D2 between the second heel side pocket 40b and the second heel portion 20b (see FIG. 5) is longer than the distance D1 between the first heel side pocket 40a and the first heel portion 20a (see FIG. 2). big. The separation distance D3 (see FIG. 8) between the third heel side pocket 40c and the third heel portion 20c is larger than the separation distance D2 (see FIG. 5) between the second heel side pocket 40b and the second heel portion 20b.

The headset according to this embodiment further includes a first weight 60 and a second weight 62 shown in FIGS. 2, 5, and 8. The first weight 60 and the second weight 62 are cylindrical bodies having substantially the same diameter and height. However, the first weight 60 and the second weight 62 are made of metals having different specific gravities. Therefore, the masses of the first weight 60 and the second weight 62 are different from each other. To give an example of a combination of the first weight 60 and the second weight 62, the first weight 60 is made of a tungsten alloy and has a mass of 5.0 g. The second weight 62 is made of aluminum alloy and has a mass of 1.0 g.

Each of the first toe side pocket 32a to third toe side pocket 32c can accommodate two weights. The two weights are arranged along the extending direction of each of the first toe side pocket 32a to the third toe side pocket 32c. Here, for example, two first weights 60 may be selected as the two weights. Alternatively, two second weights 62 may be selected as the two weights. Alternatively, the two weights may be a combination of one first weight 60 and one second weight 62. In this case, for example, first the first weight 60 is stored in the first toe side pocket 32a to the third toe side pocket 32c, and then the second weight 62 is stored in the first toe side pocket 32a to the third toe side pocket 32c. It can be accommodated in the pocket 32c. On the contrary, the second weight 62 is first stored in the first toe side pocket 32a to the third toe side pocket 32c, and then the first weight 60 is stored in the first toe side pocket 32a to the third toe side pocket 32c. It may be stored in the side pocket 32c.

In this way, there are four combinations of the two weights accommodated in the first toe side pocket 32a. There are also four combinations of the two weights accommodated in the second toe side pocket 32b, and there are also four combinations of the two weights accommodated in the third toe side pocket 32c. Therefore, the total number of weights accommodated in the first toe side pocket 32a to the third toe side pocket 32c is six, and there are 64 combinations.

The player can visually recognize the weights housed in each of the first toe side pocket 32a to third toe side pocket 32c through the first window 36 and the second window 38. A portion of the weight previously accommodated in the first toe side pocket 32a to third toe side pocket 32c is visible through the first window 36. A portion of the weight later accommodated in the first toe-side pocket 32a to third toe-side pocket 32c is visible through the second window 38. Therefore, the player can see through the first window 36 and the second window 38 whether the first weight 60 or the second weight 62 is stored in the first toe side pocket 32a to the third toe side pocket 32c in any order. You can check if there are any.

A first male threaded plug 64 is screwed into each of the female threads of the first toe side pocket 32a to third toe side pocket 32c. The first male threaded plug 64 transfers the two weights housed in each of the first toe side pocket 32a to third toe side pocket 32c to each of the first toe side pocket 32a to third toe side pocket 32c. Press it against the bottom wall. As a result, the two weights are positioned inside each of the first toe side pocket 32a to third toe side pocket 32c. In addition, since the first male threaded plug 64 closes each opening of the first toe side pocket 32a to third toe side pocket 32c, the two weights close the openings of the first toe side pocket 32a to third toe side pocket 32c. Falling off is avoided.

By changing the type and position of the weights stored in the first toe side pocket 32a to third toe side pocket 32c, the center of gravity heights GH1, GH2, and GH3 of the first head 12a to third head 12c can be adjusted to the player's height. It is possible to adjust it according to your preference. Here, as described above, in the first head 12a to the third head 12c, as the count and the loft angle increase, the respective extending directions of the first toe side pocket 32a to the third toe side pocket 32c and the horizontal line H The intersection angle with Therefore, as the count increases, the heights of the center of gravity GH1, GH2, and GH3 can be efficiently increased. Note that the center of gravity heights GH1, GH2, and GH3 are shown in FIGS. 3, 6, and 9, respectively. Reference symbols G1, G2, and G3 in FIGS. 3, 6, and 9 indicate the centers of gravity of the first head 12a, the second head 12b, and the third head 12c, respectively.

The value obtained by subtracting the crossing angle γ1 from the crossing angle γ3 is preferably 4° or more. If the value obtained by subtracting the crossing angle γ1 from the crossing angle γ3 is less than 4°, it will not be easy to make the center of gravity heights sufficiently different between the first head 12a to the third head 12c. An example of a combination of γ1, γ2, and γ3 is, for example, 50°, 61.5°, and 70°. At this time, the value obtained by subtracting the crossing angle γ1 from the crossing angle γ3 is 20°.

Furthermore, in this embodiment, as described above, the relationship of length N1 of the first neck portion 26a<length N2 of the second neck portion 26b<length N3 of the third neck portion 26c holds true. In other words, in the first head 12a to the third head 12c, the length of the neck portion increases as the count and loft angle increase. In this way, by increasing the length of the neck portion as the count increases, it is also possible to efficiently increase the height of the center of gravity as the count increases. An example of a combination of N1, N2, and N3 is 63 mm, 66 mm, and 69 mm.

Each of the first heel side pocket 40a to third heel side pocket 40c can also accommodate two weights. The two weights are arranged along the extending direction of each of the first heel side pocket 40a to the third heel side pocket 40c. Similarly to the above, the two first weights 60 or the two second weights 62 can be selected as the two weights. Alternatively, the two weights may be a combination of one first weight 60 and one second weight 62. In this case, for example, the first weight 60 is first stored in the first heel side pocket 40a to the third heel side pocket 40c, and then the second weight 62 is stored in the first heel side pocket 40a to the third heel side pocket 40c. It is stored in the pocket 40c. On the contrary, as shown in FIGS. 2, 5, and 8, the second weight 62 is first stored in the first heel side pocket 40a to the third heel side pocket 40c, and then the second weight 62 is stored in the first heel side pocket 40a to the third heel side pocket 40c. The weight 60 may be stored in the first heel side pocket 40a to the third heel side pocket 40c.

In this way, there are four combinations of the two weights accommodated in the first heel side pocket 40a. There are also four combinations of the two weights accommodated in the second heel side pocket 40b, and there are also four combinations of the two weights accommodated in the third heel side pocket 40c. Therefore, the total number of weights accommodated in the first heel side pocket 40a to the third heel side pocket 40c is six, and there are 64 combinations.

The player can visually recognize the weights housed in each of the first heel side pocket 40a to third heel side pocket 40c through the third window 44 and the fourth window 46. Part of the weight previously accommodated in the first heel side pocket 40a to third heel side pocket 40c is visible through the fourth window 46. A portion of the weight later accommodated in the first heel side pocket 40a to third heel side pocket 40c is visible through the third window 44. Therefore, the player can see through the third window 44 and the fourth window 46 whether the first weight 60 or the second weight 62 is stored in the first heel side pocket 40a to the third heel side pocket 40c in any order. You can check if there are any.

A second male threaded plug 66 is screwed into each female thread of the first heel side pocket 40a to third heel side pocket 40c. The second male threaded plug 66 allows two weights housed in each of the first heel side pocket 40a to third heel side pocket 40c to be inserted into each of the first heel side pocket 40a to third heel side pocket 40c. Press it against the bottom wall. As a result, the two weights are positioned inside each of the first heel side pocket 40a to the third heel side pocket 40c. In addition, since the second male threaded plug 66 closes each opening of the first heel side pocket 40a to the third heel side pocket 40c, the two weights close the openings of the first heel side pocket 40a to the third heel side pocket 40c. Falling off is avoided.

By changing the type and position of the weights stored in the first heel side pocket 40a to third heel side pocket 40c, the center of gravity distances GL1, GL2, and GL3 of the first head 12a to third head 12c can be adjusted to the player's preference. It is possible to adjust it accordingly. Here, as described above, in the first head 12a to the third head 12c, the heel side pocket is closer to the toe portion as the count and loft angle become larger. Therefore, as the count increases, the center of gravity distances GL1, GL2, and GL3 can be efficiently increased. Note that the center of gravity distances GL1, GL2, and GL3 are shown in FIGS. 1, 4, and 7, respectively. The symbols G1, G2, and G3 in FIGS. 1, 4, and 7 indicate the respective centers of gravity of the first head 12a, the second head 12b, and the third head 12c, as described above.

As understood from the above, the total number of weights accommodated in the first toe side pocket 32a to third toe side pocket 32c and the first heel side pocket 40a to third heel side pocket 40c is 12. . Further, there are 4096 combinations of weights accommodated in the first toe side pocket 32a to third toe side pocket 32c and the first to third heel side pocket 40a to 40c. By changing the type and position of the weights accommodated in the first toe side pocket 32a to third toe side pocket 32c and the first heel side pocket 40a to third heel side pocket 40c, the first head 12a to third head It is possible to adjust the height and distance of the center of gravity of the head 12c according to the player's preference.

In the embodiment described above, there are two types of weights, the first weight 60 and the second weight 62, but there may be three or more types. In this case, the three types of weights have different specific gravity (mass). Further, the number of weights accommodated in the first toe side pocket 32a to third toe side pocket 32c and the first heel side pocket 40a to third heel side pocket 40c may be one or three or more. It may be.

[Example 1]
The first head, the second head, and the third head are the 5th, 7th, and 10th heads, respectively, and the first, second, and third necks are provided with the first shaft, the second shaft, and the third head. I installed each of the 3 shafts. Through the above steps, a first iron club, a second iron club, and a third iron club were obtained. FIG. 10 shows the loft angle β of each of the first to third heads. The loft angle β increases in the order of the first head, second head, and third head. The loft angle β corresponds to the loft angles β1, β2, and β3 shown in FIGS. 3, 6, and 9.

FIG. 10 also shows the intersection angle γ between the toe side pocket and the horizontal direction (horizontal line H) in each of the first to third heads. The intersection angle γ increases in the order of the first head, second head, and third head. The crossing angle γ corresponds to the crossing angles γ1, γ2, and γ3 in FIGS. 2, 5, and 8.

FIG. 10 also shows the length N of the neck portion of each of the first to third heads. The length N of the neck portion increases in the order of the first head, second head, and third head. The length N of the neck portion corresponds to the lengths N1, N2, and N3 in FIGS. 1, 4, and 7.

A heel side pocket was formed in each of the first head, second head, and third head. The heel side pocket approaches the toe side as the count increases. That is, the distance between the heel portion and the heel side pocket increases in the order of the first head, second head, and third head. The distance between the heel portion and the heel side pocket corresponds to the distances D1, D2, and D3 shown in FIGS. 2, 5, and 8. However, FIG. 10 does not show the numerical value of the distance between the heel portion and the heel side pocket.

For each of the above first to third iron clubs, two selected from two first weights and two second weights were stored in the toe side pocket. Similarly, two weights selected from two first weights and two second weights were accommodated in the heel side pocket. Here, both the first weight and the second weight are cylindrical bodies with a height (length in the axial direction) of 10 mm and a bottom diameter of 6.7 mm. The first weight is made of tungsten alloy and has a mass of 5.0 g. The second weight is made of aluminum alloy and has a mass of 1.0 g.

The combination and arrangement of the weights in the toe side pocket and the heel side pocket are also shown in FIG. 11. Also shown are the heights and distances of the centers of gravity of each of the first to third heads at this time. However, the numerical values are not actually measured values, but relative values with each of the height and distance of the center of gravity of the first head as 100. The height of the center of gravity corresponds to the heights of the center of gravity GH1, GH2, and GH3 shown in FIGS. 3, 6, and 9. The center of gravity distances correspond to center of gravity distances GL1, GL2, and GL3 shown in FIGS. 1, 4, and 7, respectively. In this club set, the first head to the third head all have a low center of gravity, and the distance between the centers of gravity is set to be short. In other words, the center of gravity is closer to the heel.

A first player tried hitting the first to third iron clubs to which the weights were attached as described above. That is, a golf ball was hit using the first to third iron clubs. As a result, shots that satisfied the first player were obtained with any of the first to third iron clubs.

[Example 2]
A second player, who is different from the first player, made test hits in the same manner as above, except that the combination and arrangement of the weights in the toe side pocket and the heel side pocket were changed as shown in FIG. Note that the center of gravity height and center of gravity distance of each of the first to third heads at this time were as shown in FIG. However, the numerical values are not actually measured values, but relative values, with each numerical value of the height and distance of the center of gravity of the first head of Example 1 being 100. In this club set, each of the first head to the third head has a high center of gravity, and the distance between the centers of gravity is set to be relatively long.

In this case as well, shots that the second player was satisfied with were obtained with all of the first to third iron clubs.

[Example 3]
A third player, who is different from the first and second players, made a test shot in the same manner as above, except that the combination and arrangement of the weights in the toe side pocket and heel side pocket were changed as shown in Figure 13. did. Note that the height and distance of the center of gravity of each of the first to third heads at this time were as shown in FIG. However, the numerical values are not actually measured values, but relative values, with each numerical value of the height and distance of the center of gravity of the first head of Example 1 being 100. In this club set, the first head has a low center of gravity and a short distance between the centers of gravity, whereas the second and third heads have high centers of gravity and relatively long distances between the centers of gravity.

In this case as well, shots that the third player was satisfied with were obtained with all of the first to third iron clubs.

As understood from the above, by changing the combination and position of the weights, the height and distance of the center of gravity can be changed according to the player's preference. As a result, shots that satisfy a variety of players can be obtained.

Note that the present invention is not limited to the disclosure described above, and can take various configurations without departing from the gist of the present invention.

10a to 10c...first to third iron clubs 12a to 12c...first to third heads 14a to 14c...first to third shafts 16a to 16c...first to third sole parts 18a to 18c...first to third 3 toe parts 20a to 20c...first to third heel parts 22a to 22c...first to third face parts 24a to 24c...first to third back face parts 26a to 26c...first to third neck parts 32a to 32c...first to third toe side pockets 36, 38, 44, 46...windows 40a to 40c...first to third heel side pockets 60, 62...first and second weights

Claims (4)

A first head for a first iron club having the smallest number, a second head for a second iron club having a larger number than the first head, and a third head for a third iron club having the largest number. A headset comprising:
comprising a first weight and a second weight having a different mass from the first weight,
Each of the first head, the second head, and the third head has a sole part, a toe part, a heel part, a face part , a back face part , and a neck part,
In the back face portion of each of the first head, the second head, and the third head, a toe side extending linearly from the sole portion toward the toe portion is provided in a portion close to the toe portion. A pocket is formed, and the toe side pocket accommodates one or more weights selected from the first weight and the second weight arranged along the extending direction of the toe side pocket. is possible,
When the sole portions of each of the first head, the second head, and the third head extend horizontally when viewed from the back face portion , the direction in which the toe side pocket extends is as follows: a direction from the sole portion toward the toe portion and inclined with respect to the horizontal direction;
A headset, wherein an intersection angle between the extending direction of the toe-side pocket and the horizontal direction increases in the order of the first head, the second head, and the third head. 2. The headset according to claim 1, wherein a value obtained by subtracting the crossing angle at the first head from the crossing angle at the third head is 4 degrees or more. The headset according to claim 1, wherein the length of the neck portion increases in the order of the first head, the second head, and the third head. 4. The headset according to claim 1, wherein the back face portion of each of the first head, the second head, and the third head is close to the heel portion and the sole portion. A linearly extending heel side pocket is formed in the region, and the heel side pocket carries one or more weights selected from the first weight and the second weight in the extending direction of the heel side pocket. It is possible to accommodate it as being arranged along the
In the headset, the heel side pocket is located closer to the toe portion in the order of the first head, the second head, and the third head.

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