Golf club head

Abstract

To provide a golf club head having a novel heavy weight product fixing structure.SOLUTION: A golf club head 100 comprises a heavy weight product 200 and a heavy weight product attachment part 300 arranged at an outer face of the head 100, and accommodating at least a part of the heavy weight product 200. The heavy weight product 200 can transit between a fixing state and a non-fixing state at the heavy weight product attachment part 300. The heavy weight product 200 or the heavy weight product attachment part 300 has a deformation mechanism dm1 for deforming itself. The heavy weight product attachment part 300 has rotational force impartment parts T1, T2 for imparting rotational forces to the heavy weight product 200 by a reaction for push-pressing the heavy weight product 200 by the deformation, and rotation prohibition parts T3, T4 arranged in a position abutting on the heavy weight product 200 in a state that the rotational forces are imparted, and prohibiting the rotation of the heavy weight product 200 by receiving the rotation of the heavy weight product 200 which is generated by the rotational forces.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to golf club heads. [Background technology]

[0002] A golf club head equipped with a detachable weight is known. JP 2014-128312 A discloses a weight that can be attached by rotating it through an angle of +θ° and detached by rotating it through an angle of −θ°. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-128312 Summary of the Invention [Problem to be solved by the invention]

[0004] The present inventors have discovered a new fixing structure for fixing a heavy object to the head body, and have found that this fixing structure has effects not found in the past.

[0005] One of the objects of the present disclosure is to provide a golf club head having a new fixing structure for a heavy object. [Means for solving the problem]

[0006] In one aspect, a golf club head includes a weight and a weight attachment portion provided on the outer surface of the head to which the weight is attached. The weight can be transitioned between a fixed state and an unlocked state at the weight attachment portion. The weight or the weight attachment portion has a deformation mechanism that deforms itself. The weight attachment portion has a rotational force applying portion that applies a rotational force to the weight in reaction to the weight being pressed by the deformation, and a rotation preventing portion that is positioned to abut the weight when the rotational force is applied, and that receives the rotation of the weight due to the rotational force and prevents the rotation of the weight. The fixed state is achieved by maintaining the weight pressed against the rotation preventing portion by the rotational force. [Effects of the Invention]

[0007] In one aspect, a golf club head can be provided that includes a new fixing structure for a heavy object. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view of a golf club head according to a first embodiment. [Figure 2] FIG. 2 is a side view of the head of FIG. 1 as seen from the toe side. [Figure 3] FIG. 3 is an exploded perspective view of the head of FIG. [Figure 4] 4 is a bottom view of the head body of the head in FIG. 1 as viewed from the sole side. [Figure 5] FIG. 5 is a cross-sectional view of the head main body taken along the line AA in FIG. [Figure 6] Fig. 6 is a cross-sectional view taken along line BB in Fig. 1. Fig. 6 shows the non-fixed state. [Figure 7] FIG. 7 is a cross-sectional view of the embodiment of FIG. 6 when it is moved to a fixed state. [Figure 8] Figures 8(a) and 8(b) are cross-sectional views of a heavy load and a heavy load mounting portion in the second embodiment, where Figure 8(a) shows the non-fixed state and Figure 8(b) shows the fixed state. [Figure 9] FIG. 9(a) is a cross-sectional view of a weight mounting portion of a modified example, and FIG. 9(b) is a cross-sectional view of a weight mounting portion of another modified example. [Figure 10] Figures 10(a) to 10(d) show the heavy load and the heavy load mounting portion of the third embodiment. Figure 10(a) shows the dimensional relationship between the heavy load and the heavy load mounting portion, Figure 10(b) shows the non-fixed state, Figure 10(c) shows the fixed state, and Figure 10(d) shows the force acting on the heavy load in the fixed state. [Figure 11] Figures 11(a) to 11(d) show the heavy load and the heavy load mounting portion of the fourth embodiment. Figure 11(a) shows the dimensional relationship between the heavy load and the heavy load mounting portion, Figure 11(b) shows the non-fixed state, Figure 11(c) shows the fixed state, and Figure 11(d) shows the force acting on the heavy load in the fixed state. [Figure 12] Figures 12(a) to 12(d) show the weight load and the weight load mounting portion of the fifth embodiment. Figure 12(a) shows the dimensional relationship between the weight load and the weight load mounting portion, Figure 12(b) shows the non-fixed state, Figure 12(c) shows the fixed state, and Figure 12(d) shows the force acting on the weight load in the fixed state. [Figure 13] FIG. 13 is a cross-sectional view showing a heavy load and a heavy load mounting portion of the sixth embodiment. [Figure 14] FIG. 14 is a cross-sectional view showing a heavy load and a heavy load mounting portion of the seventh embodiment. [Figure 15] FIG. 15 is a cross-sectional view showing a heavy load and a heavy load mounting portion of the eighth embodiment. [Figure 16] Fig. 16(a) is an exploded cross-sectional view of the heavy load mounting portion of the ninth embodiment, and Fig. 16(b) is a cross-sectional view of the heavy load and the heavy load mounting portion of the ninth embodiment. Fig. 16(b) shows the fixed state. [Figure 17] FIG. 17 is a schematic diagram showing the mechanism of the ninth embodiment. [Figure 18] FIG. 18 is the same cross-sectional view as FIG. 10(c). [Figure 19] FIG. 19 is a conceptual diagram for explaining the reference state. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, the embodiments will be described in detail with reference to the drawings as appropriate.

[0010] In the present application, a reference state, a reference vertical plane, a toe-heel direction, a face-back direction, a top-sole direction, and a face center are defined.

[0011] The state in which the head is placed on the ground plane HP at a predetermined lie angle is defined as the reference state. As shown in Figure 19, in this reference state, the shaft axis Z is included in a plane VP perpendicular to the ground plane HP. The shaft axis Z is the center line of the shaft. Typically, the shaft axis Z coincides with the center line of the hosel hole. The plane VP is defined as the reference vertical plane. The predetermined lie angle is listed, for example, in a product catalog.

[0012] In this reference state, the face angle is set to 0 degrees. That is, in a plan view from above, the normal to the face center of the hitting face is set to be perpendicular to the toe-heel direction. The definitions of the face center and the toe-heel direction will be described later.

[0013] In the present application, the toe-heel direction is the direction of the intersection line NL between the reference vertical plane VP and the ground plane HP (see FIG. 19).

[0014] In this application, the face-back direction is a direction perpendicular to the toe-heel direction and parallel to the ground plane HP. The face side in the face-back direction is also simply referred to as the "face side." The back side in the face-back direction is also simply referred to as the "back side."

[0015] In the present application, the top-sole direction is a direction perpendicular to the toe-heel direction and perpendicular to the face-back direction. In other words, in the present application, the top-sole direction is a direction perpendicular to the ground plane HP.

[0016] In the present application, the face center is determined as follows. First, an arbitrary point Pr is selected that is approximately near the center of the striking face in the top-sole direction and the toe-heel direction. Next, a plane is determined that passes through this point Pr, extends along the normal to the striking face at point Pr, and is parallel to the toe-heel direction. An intersection line between this plane and the striking face is drawn, and its midpoint Px is determined. Next, a plane is determined that passes through this midpoint Px, extends along the normal to the striking face at point Px, and is parallel to the top-sole direction. An intersection line between this plane and the striking face is drawn, and its midpoint Py is determined. Next, a plane is determined that passes through this midpoint Py, extends along the normal to the striking face at point Py, and is parallel to the toe-heel direction. A line of intersection between this plane and the striking face is drawn, and its midpoint Px is newly determined. Next, a plane is determined that passes through this new midpoint Px, extends along the normal to the striking face at point Px, and is parallel to the top-sole direction. A line of intersection between this plane and the striking face is drawn, and its midpoint Py is newly determined. This process is repeated to sequentially determine Px and Py. During this process, the new position Py (last position Py) when the distance between the new midpoint Py and the previous midpoint Py is first 0.5 mm or less is the face center.

[0017] Fig. 1 is a perspective view of a head 100 of a first embodiment as seen from the sole side. Fig. 2 is a side view of the head 100 as seen from the toe side. Fig. 3 is an exploded perspective view of the head 100. Fig. 4 is a bottom view of a head body 102 of the head 100 as seen from the sole side.

[0018] The head 100 (head body 102) has a face portion 104, a crown portion 106, a sole portion 108, and a hosel portion 110. The hosel portion 110 has a hosel hole 112.

[0019] The head 100 has a heavy load 200. The head 100 is composed of the heavy load 200 and a head main body 102. As shown in FIG. 3, the heavy load 200 has an outer member 202, an inner member 204, and a connecting member 206. The outer member 202 is located outside the head 100 with respect to the inner member 204. The connecting member 206 connects the outer member 202 and the inner member 204. In this embodiment, the connecting member 206 is a screw. Furthermore, the heavy load 200 has a washer 208. The washer 208 is a C-shaped member. The connecting member 206 has a head 210 and a threaded portion 212. The threaded portion 212 forms a male thread. A circumferential groove 214 is formed on the outer peripheral surface of the head 210.

[0020] The terms "outer member" and "inner member" are used simply to distinguish one from the other. From this perspective, the "outer member" may simply be referred to as the first member, and the "inner member" may simply be referred to as the second member.

[0021] The head 100 has a weight attachment portion 300. The weight 200 is attached to the weight attachment portion 300. The weight attachment portion 300 is provided on the outer surface of the head 100. The weight attachment portion 300 is provided on the sole portion 108. The weight attachment portion 300 defines a groove 302. In a plan view (FIG. 4), the groove 302 extends along the periphery of the head 100. In a plan view (FIG. 4), the groove 302 extends along the periphery of the sole portion 108.

[0022] The weight attachment portion 300 may be provided in a portion other than the sole portion. For example, the weight attachment portion 300 may be provided in the crown portion, or in a side portion (skirt portion) between the crown portion and the sole portion.

[0023] When the weight load 200 is in an unfixed state, the weight load 200 can move (slide) within the groove 302. As will be described later, the weight load mounting portion 300 has a first wall portion 304 and a second wall portion 306 opposing the first wall portion 304. In an unfixed state, the weight load 200 can move within the weight load mounting portion 300, guided by the first wall portion 304 and the second wall portion 306. At each position (any position) in this movement direction, the weight load 200 can be in a fixed state. In the head 100, the weight load 200 is exposed to the outside.

[0024] 5 is a cross-sectional view taken along line AA in FIG. 4. The head 100 (head main body 102) has a hollow structure. The head 100 (head main body 102) has a head outer surface 100a and a head inner surface 100b. The head inner surface 100b faces the hollow portion of the head 100. The sole portion 108 has a sole outer surface 108a and a sole inner surface 108b. The weight attachment portion 300 is a recess provided in the head outer surface 100a. The weight attachment portion 300 is a recess provided in the sole outer surface 108a. The weight attachment portion 300 accommodates at least a portion of the weight 200.

[0025] The concepts of "one side" and "other side" are used with respect to the weight attachment portion 300. "One side" and "other side" are opposite sides to each other. "One side" and "other side" only mean that they are opposite sides to each other. There is no limitation on which direction the one side is. There is no limitation on which direction the other side is. In this embodiment (FIG. 5), the one side is the back side, and the other side is the face side.

[0026] Furthermore, the concepts of upper and lower sides are used with respect to the heavy load mounting portion 300. The upper and lower sides are opposite sides. In this embodiment (FIG. 5), the upper side is the opening side of the heavy load mounting portion 300, which is the outside of the head 100. The lower side is the bottom side of the heavy load mounting portion 300, which is the inside of the head 100.

[0027] The above four directions (one side, the other side, the upper side, and the lower side) with respect to the heavy load mounting part 300 also apply to the heavy load 200 accommodated in the heavy load mounting part 300. In this case, the rotation center line z1 of the connecting member 206 of the heavy load 200 can be considered to be oriented in the up-down direction (see FIG. 6 described later).

[0028] As shown in Figure 5, the heavy load mounting portion 300 has a first wall portion 304 and a second wall portion 306. The second wall portion 306 faces the first wall portion 304. The first wall portion 304 is a wall portion on one side. The second wall portion 306 is a wall portion on the other side. Furthermore, the heavy load mounting portion 300 has a bottom portion 308. The bottom portion 308 connects the lower ends of the first wall portion 304 and the second wall portion 306. The upper ends of the first wall portion 304 and the second wall portion 306 form an opening edge 310 of the heavy load mounting portion 300 (see Figure 4).

[0029] The first wall portion 304 has a vertical surface 312 facing the other side and a recessed portion 314 located below the vertical surface 312. The vertical surface 312 faces the second wall portion 306. The recessed portion 314 is recessed toward one side. The recessed portion 314 forms a downwardly facing surface 316 facing downward. The downwardly facing surface 316 faces the bottom portion 308.

[0030] The second wall portion 306 has a vertical surface 320 facing one side and an upward surface 322 located above the vertical surface 320. The vertical surface 320 faces the first wall portion 304. The upward surface 322 extends further to the other side than the vertical surface 320.

[0031] 6 and 7 are cross-sectional views of the heavy load mounting portion 300 on which the heavy load 200 is placed. Fig. 6 shows the non-fixed state, and Fig. 7 shows the fixed state.

[0032] The outer member 202 has a head accommodating hole 216 and a through-hole 218 that is coaxially connected to the head accommodating hole 216. The outer member 202 holds the head 210 of the connecting member 206 while allowing the threaded portion 212 to pass through. A washer 208 is fitted into a circumferential groove 217 provided on the inner circumferential surface of the head accommodating hole 216 of the outer member 202. The engagement between the washer 208 and the circumferential groove 214 prevents the connecting member 206 from falling off the outer member 202. The outer member 202 holds the connecting member 206 in a rotatable manner.

[0033] The inner member 204 has a female screw hole 220. The female screw hole 220 passes through the inner member 204. A screw portion 212 is screwed into the female screw hole 220. By rotating the connecting member 206, the relative positional relationship between the outer member 202 and the inner member 204 can be changed. As a result, the heavy load 200 is deformed. The heavy load 200 has a deformation mechanism dm1 that deforms itself.

[0034] As shown in Figure 6, in the unlocked state, the distance between the outer member 202 and the inner member 204 is relatively long. As shown in Figure 7, in the locked state, the distance between the outer member 202 and the inner member 204 is relatively short. The locked state is achieved by rotating the connecting member 206 and bringing the outer member 202 and the inner member 204 closer together.

[0035] The inner member 204 has an upward surface 222 on one side thereof. The inner member 204 has an extending portion 224 that fits into the recess 314 of the heavy load mounting portion 300. The extending portion 224 is an end portion on one side of the inner member 204. The extending portion 224 includes a portion that extends further to one side than the end on one side of the outer member 202. The upward surface 222 is the upper surface of the extending portion 224. In the unlocked state (FIG. 6), the upward surface 222 is positioned opposite the downward surface 316.

[0036] The outer member 202 has a downward surface 226 on the other side. The outer member 202 has an extending portion 228 that extends above the upward surface 322. The extending portion 228 is the other end portion of the outer member 202. The extending portion 228 includes a portion that extends further to the other side than the other end of the inner member 204. The downward surface 226 is the lower surface of the extending portion 228. In the unlocked state (FIG. 6), the downward surface 226 is positioned opposite the upward surface 322.

[0037] The outer member 202 has a vertical surface 230 on one side thereof. The vertical surface 230 faces one side. The vertical surface 230 is an end surface on one side of the outer member 202. In the unlocked state (FIG. 6), the vertical surface 230 is positioned opposite the vertical surface 312.

[0038] The inner member 204 has a vertical surface 232 on its other side. The vertical surface 232 faces the other side. The vertical surface 232 is the other end surface of the inner member 204. In the unlocked state (FIG. 6), the vertical surface 232 is positioned opposite the vertical surface 320.

[0039] In FIG. 6, the double-headed arrow E1 indicates the length from one end of the inner member 204 to the rotation center line z1. In FIG. 6, the double-headed arrow E2 indicates the length from the other end of the outer member 202 to the rotation center line z1. In FIG. 6, the double-headed arrow E3 indicates the length from one end of the outer member 202 to the rotation center line z1. In FIG. 6, the double-headed arrow E4 indicates the length from the other end of the inner member 204 to the rotation center line z1. Lengths E1 to E4 are measured along a direction perpendicular to the rotation center line z1. Length E1 is greater than length E3. Length E2 is greater than length E4. Length E1 is greater than length E4. Length E2 is greater than length E3.

[0040] In the unlocked state, the gap between the heavy load 200 and the heavy load mounting portion 300 is small. If the heavy load 200 is difficult to insert into the heavy load mounting portion 300, the distance between the outer member 202 and the inner member 204 can be increased, or the outer member 202 and the inner member 204 can be separated and the inner member 204 can be inserted first. Once inserted, the heavy load 200 will not fall off the heavy load mounting portion 300 in the unlocked state. As shown in FIG. 6 , in the unlocked state, due to gravity acting on the heavy load 200, the downward surface 226 abuts against the upward surface 322 and the vertical surface 230 abuts against the vertical surface 312. The upward surface 222 and the downward surface 316 are close to each other, and the vertical surface 232 and the vertical surface 320 are close to each other.

[0041] In this manner, the heavy load 200 is placed in the heavy load mounting portion 300 in an unlocked state. From this unlocked state, the deformation mechanism dm1 is activated. In this embodiment, the deformation mechanism dm1 is activated by rotating the connecting member 206 (turning the screw). Rotating the connecting member 206 brings the outer member 202 and the inner member 204 closer together. The inner member 204 is lifted upward, and the upward surface 222 contacts the downward surface 316, and the vertical surface 232 contacts the vertical surface 320, achieving contact at a total of four points simultaneously. Further tightening the connecting member 206 increases the contact pressure at each contact point, and the forces acting on the heavy load 200 from each part of the heavy load mounting portion 300 are balanced, thereby achieving the locked state. To transition from the locked state to the unlocked state, the connecting member 206 is rotated in the opposite direction to increase the distance between the outer member 202 and the inner member 204.

[0042] When the connecting member 206 is loosened in the fixed state, the inner member 204 separates from the outer member 202, and the state transitions to the unlocked state. When the connecting member 206 is tightened, the state transitions from the unlocked state to the fixed state. The weight load 200 can be transitioned between the fixed state and the unlocked state at the weight load mounting portion 300.

[0043] In the fixed state (FIG. 7), the heavy load 200 and the heavy load mounting part 300 are in contact at four points. The four points on the heavy load 200 are referred to as a first contact part S1, a second contact part S2, a third contact part S3, and a fourth contact part S4. The four points on the heavy load mounting part 300 are referred to as a first contact part T1, a second contact part T2, a third contact part T3, and a fourth contact part T4.

[0044] In this embodiment, the first contact portion S1 is located on the upward surface 222, the second contact portion S2 is located on the downward surface 226, the third contact portion S3 is located on the vertical surface 230, and the fourth contact portion S4 is located on the vertical surface 232. In this embodiment, the first abutment portion T1 is located on the downward surface 316, the second abutment portion T2 is located on the upward surface 322, the third abutment portion T3 is located on the vertical surface 312, and the fourth abutment portion T4 is located on the vertical surface 320.

[0045] The first contact portion S1 (first abutment portion T1) is located on one side of the connecting member 206. The second contact portion S2 (second abutment portion T2) is located on the other side of the connecting member 206. The third contact portion S3 (third abutment portion T3) is located on one side of the connecting member 206. The fourth contact portion S4 (fourth abutment portion T4) is located on the other side of the connecting member 206. The first abutment portion T1 (first contact portion S1) is located below the third abutment portion T3 (third contact portion S3). The first abutment portion T1 (first contact portion S1) is located below the second abutment portion T2 (second contact portion S2). The fourth abutment portion T4 (fourth contact portion S4) is located below the second abutment portion T2 (second contact portion S2). The fourth contact portion T4 (fourth contact portion S4) is located below the third contact portion T3 (third contact portion S3).

[0046] The first contact portion T1 is provided on the first wall portion 304 (see FIG. 5). The second contact portion T2 is provided on the second wall portion 306 (see FIG. 5). The third contact portion T3 is provided on the first wall portion 304. The fourth contact portion T4 is provided on the second wall portion 306.

[0047] 8(a) and 8(b) are cross-sectional views of the vicinity of the weight in the head 120 according to the second embodiment. Fig. 8(a) shows the non-fixed state, and Fig. 8(b) shows the fixed state. Except for the points described below, the head 120 is the same as the head 100.

[0048] The head 120 has a heavy load 400. The head 120 is composed of the heavy load 400 and a head main body 122. The heavy load 400 has an outer member 402, an inner member 404, and a connecting member 406. The outer member 402 is located outside the head 120 with respect to the inner member 404. The connecting member 406 connects the outer member 402 and the inner member 404. In this embodiment, the connecting member 406 is a screw. Furthermore, the heavy load 400 has a washer 408. Similar to the connecting member 206 described above, the connecting member 406 is rotatably held by the outer member 402. The inner member 404 is threadedly engaged with a threaded portion 412 of the connecting member 406.

[0049] The head 120 (head main body 122) has a heavy load mounting portion 500. The heavy load mounting portion 500 has a first wall portion 504 and a second wall portion 506. The second wall portion 506 faces the first wall portion 504. The first wall portion 504 is a wall portion on one side. The second wall portion 506 is a wall portion on the other side. Furthermore, the heavy load mounting portion 500 has a bottom portion 508. The bottom portion 508 connects the lower end of the first wall portion 504 and the lower end of the second wall portion 506.

[0050] The first wall portion 504 has an upward surface 512 facing upward and a recessed portion 514 located below the upward surface 512. The upward surface 512 is the upper end surface of the first wall portion 504. The recessed portion 514 is recessed toward one side. The recessed portion 514 forms a downward surface 516 facing downward. The downward surface 516 is located below the upward surface 512. The downward surface 516 faces the bottom portion 508. A vertical surface 518 is provided above the downward surface 516. The vertical surface 518 faces a vertical surface 520.

[0051] The second wall portion 506 has a vertical surface 520 facing one side. The vertical surface 520 faces the first wall portion 504. The vertical surface 520 is flat.

[0052] Rotating the connecting member 406 changes the relative positional relationship between the outer member 402 and the inner member 404. As a result, the weight 400 is deformed. The weight 400 has a deformation mechanism dm2 that deforms itself.

[0053] As shown in Figure 8(a), in the unlocked state, the distance between the outer member 402 and the inner member 404 is relatively long. As shown in Figure 8(b), in the locked state, the distance between the outer member 402 and the inner member 404 is relatively short. The locked state is achieved by rotating the connecting member 406 to bring the outer member 402 and the inner member 404 closer to each other and causing the connecting member 406 to protrude below the inner member 404.

[0054] The inner member 404 has a corner 422 on one side thereof. The corner 422 is a corner that faces one side and upward. The corner 422 is rounded. The inner member 404 has an extension 424 that fits into the recess 514 of the heavy load mounting part 500. The extension 424 is an end part on one side of the inner member 404. The corner 422 is a corner of the extension 424. In the non-fixed state ( FIG. 8( a) ), the corner 422 is positioned opposite the downward surface 516.

[0055] The outer member 402 has a vertical surface 426 on its other side. The vertical surface 426 faces the other side. The vertical surface 426 is the end surface on the other side of the outer member 402. The vertical surface 426 is positioned opposite the vertical surface 520.

[0056] The outer member 402 has a downward surface 430 on one side thereof. The downward surface 430 is a surface facing downward. The outer member 402 has an extending portion 431 on one side thereof. The extending portion 431 is an end portion on one side of the outer member 402. The extending portion 431 includes a portion that extends further to one side than one end of the inner member 404. The downward surface 430 is the lower surface of the extending portion 431. In the non-fixed state ( FIG. 8( a) ), the vertical surface 430 is positioned opposite the vertical surface 512. The vertical surface 520 extends from a position below the downward surface 516 to a position above the upward surface 512.

[0057] The inner member 404 has a vertical surface 432 on the other side. The vertical surface 432 faces the other side. The vertical surface 432 is the end surface on the other side of the inner member 404. In the unlocked state ( FIG. 8( a) ), the vertical surface 432 is positioned opposite the vertical surface 520. The vertical surface 432 is positioned (slightly) to one side compared to the vertical surface 426 of the outer member 402.

[0058] The heavy load 400 has a deformation mechanism dm2 that deforms itself. This deformation mechanism dm2 is a mechanism that changes the relative positional relationship between the outer member 402 and the inner member 404 while changing the protruding length V1 of the connecting member 406 from the inner member 404.

[0059] The fixed state is achieved by operating the deformation mechanism dm2. By rotating the connecting member 406, the protruding length V1 increases, and the tip 434 of the connecting member 406 abuts against the bottom 508, and the rising corner 422 of the inner member 404 abuts against the downward surface 516. At the same time, the lower end of the vertical surface 432 contacts the lower part of the vertical surface 520, the lower end of the vertical surface 426 contacts the upper part of the vertical surface 520, and one end of the downward surface 430 contacts the upward surface 512. When the connecting member 406 is further tightened, the contact pressure at each contact point increases, and the force that the weight load 400 receives from the weight load mounting portion 500 is balanced, thereby achieving the fixed state.

[0060] In this embodiment, the tip portion 434 (one end thereof) of the connecting member 406 is the first contact portion S1, the corner portion 422 is the second contact portion S2, one end of the downward surface 430 is the third contact portion S3, the lower end of the vertical surface 432 is the fourth contact portion S4, and the lower end of the vertical surface 426 is the fifth contact portion S5. A portion of the bottom portion 508 that abuts against the first contact portion S1 is the first abutment portion T1. A portion of the downward surface 516 that abuts against the second contact portion S2 is the second abutment portion T2. ​​A portion of the upward surface 512 that abuts against the third contact portion S3 is the third abutment portion T3. A portion of the vertical surface 520 that abuts against the fourth contact portion S4 is the fourth abutment portion T4. A portion of the vertical surface 520 that abuts against the fifth contact portion S5 is the fifth abutment portion T5.

[0061] Unlike other embodiments, in this embodiment, there are five contact points in the fixed state. By adjusting the dimensions of the heavy load 400 and the heavy load mounting portion 500, contact at more than five points is possible. The fifth contact point T5 contributes to receiving the rotation of the heavy load 400. The fifth contact point S5 and the fifth contact point T5 may be omitted.

[0062] 9(a) shows a modified heavy load mounting part 300a. The heavy load mounting part 300a has a simplified shape of the above-described heavy load mounting part 300, and has the same basic structure as the heavy load mounting part 300. Therefore, the heavy load mounting part 300a is given the same reference numeral as the heavy load mounting part 300.

[0063] As shown in FIG. 9(a), the heavy load mounting portion 300 has a first wall portion 304 and a second wall portion 306. The second wall portion 306 faces the first wall portion 304. The first wall portion 304 is a wall portion on one side. The second wall portion 306 is a wall portion on the other side. Furthermore, the heavy load mounting portion 300a has a bottom portion 308. The bottom portion 308 connects the lower end of the first wall portion 304 and the lower end of the second wall portion 306.

[0064] The first wall portion 304 has a vertical surface 312 facing the other side and a recessed portion 314 located below the vertical surface 312. The vertical surface 312 faces the second wall portion 306. The recessed portion 314 is recessed toward one side. The recessed portion 314 forms a downwardly facing surface 316 facing downward. The downwardly facing surface 316 faces the bottom portion 308.

[0065] The second wall portion 306 has a vertical surface 320 facing one side and an upward surface 322 located above the vertical surface 320. The vertical surface 320 faces the first wall portion 304. The upward surface 322 extends further to the other side than the vertical surface 320.

[0066] 9(b) shows a modified heavy load mounting part 500a. The heavy load mounting part 500a has a simplified shape of the above-described heavy load mounting part 500, and has the same basic structure as the heavy load mounting part 500. Therefore, the heavy load mounting part 500a is given the same reference numeral as the heavy load mounting part 500.

[0067] The heavy load mounting portion 500a has a first wall portion 504 and a second wall portion 506. The second wall portion 506 faces the first wall portion 504. The first wall portion 504 is a wall portion on one side. The second wall portion 506 is a wall portion on the other side. Furthermore, the heavy load mounting portion 500 has a bottom portion 508. The bottom portion 508 connects the lower end of the first wall portion 504 and the lower end of the second wall portion 506.

[0068] The first wall portion 504 has an upward surface 512 facing upward and a recessed portion 514 located below the upward surface 512. The upward surface 512 is the upper end surface of the first wall portion 504. The recessed portion 514 is recessed toward one side. The recessed portion 514 forms a downward surface 516 facing downward. The downward surface 516 faces the bottom portion 508.

[0069] The second wall portion 506 has a vertical surface 520 facing one side. The vertical surface 520 faces the first wall portion 504. The vertical surface 520 is flat.

[0070] Figures 10(a) to 10(d) show the heavy load 200a and the heavy load mounting portion 300a in the third embodiment. Figure 10(a) shows the dimensional relationship between the heavy load 200a and the heavy load mounting portion 300a, Figure 10(b) shows the non-fixed state, Figure 10(c) shows the fixed state, and Figure 10(d) shows the force acting on the heavy load 200a in the fixed state. Note that hatching is omitted in Figure 10(d).

[0071] The heavy load attachment portion 300a is as described above. The heavy load 200a is a simplified version of the heavy load 200 described above, and has the same basic structure as the heavy load 200. Therefore, the heavy load 200a is given the same reference numeral as the heavy load 200.

[0072] The weight 200a has an outer member 202, an inner member 204, and a connecting member 206. The outer member 202 rotatably holds the connecting member 206. The inner member 204 is threadedly engaged with the threaded portion of the connecting member 206. The outer member 202 has an extending portion 228 that extends to the other side beyond the other end of the inner member 204. The extending portion 228 is located opposite an upward surface 322. The inner member 204 has an extending portion 224 that extends to one side beyond one end of the outer member 202. The extending portion 224 is located opposite a downward surface 316.

[0073] In the unfixed state shown in FIG. 10(b), the weight 200a is held by the weight attachment portion 300a in a state of contact at three points due to the action of gravity.

[0074] When the connecting member 206 is rotated and the inner member 204 is brought closer to the outer member 202, the extension portion 224 comes into contact with the downward surface 316. When the connecting member 206 is further tightened, the axial force of the connecting member 206 presses the extension portion 224 against the downward surface 316 and the extension portion 228 against the upward surface 322. As a result, a rotational force is applied to the heavy load 200a. This rotational force presses one end of the outer member 202 against the vertical surface 312 and presses the other end of the inner member 204 against the vertical surface 320. In this way, the heavy load 200a is subjected to a rotational force from the first abutment portion T1 and the second abutment portion T2. ​​This rotational force is received by the third abutment portion T3 and the fourth abutment portion T4, and the heavy load 200a is fixed.

[0075] The four contact portions of the heavy load 200a in the fixed state are referred to as the first contact portion S1, the second contact portion S2, the third contact portion S3, and the fourth contact portion S4. A rotational force is applied at the first contact portion S1 and the second contact portion S2, and rotation is prevented at the third contact portion S3 and the fourth contact portion S4. The first contact portion S1 is located on one side of the inner member 204. The first contact portion S1 is a portion that abuts against (the edge of) the downward surface 316. The second contact portion S2 is located on the other side of the outer member 202. The second contact portion S2 is a portion that abuts against (the edge of) the upward surface 322. The third contact portion S3 is located on one side of the outer member 202. The third contact portion S3 is a portion that abuts against the vertical surface 312. The fourth contact portion S4 is located on the other side of the inner member 204. The fourth contact portion S4 is a portion that comes into contact with the vertical surface 320.

[0076] The first contact portion S1 and the third contact portion S3 are located on one side. A flat vertical surface 312 extends between the first contact portion S1 and the third contact portion S3. The weight attachment portion 300a does not exist between the first contact portion S1 and the third contact portion S3.

[0077] The second contact portion S2 and the fourth contact portion S4 are located on the other side. A flat vertical surface 320 extends between the second contact portion S2 and the fourth contact portion S4. No weight attachment portion 300a exists between the second contact portion S2 and the fourth contact portion S4.

[0078] In FIG. 10(a), the double-headed arrow D1 indicates the distance (shortest distance) between the vertical surface 320 and the vertical surface 312. In FIG. 10(a), the double-headed arrow W1 indicates the width between one end of the outer member 202 and the other end of the inner member 204. This width W1 is measured along a direction perpendicular to the rotation center line of the connecting member 206. In this embodiment, the width W1 is smaller than the distance D1. As a result, the weight 200a is fixed in a state tilted to one side.

[0079] Figures 11(a) to (d) show the heavy load 200b and the heavy load mounting portion 300a in the fourth embodiment. Figure 11(a) shows the dimensional relationship between the heavy load 200b and the heavy load mounting portion 300a, Figure 11(b) shows the non-fixed state, Figure 11(c) shows the fixed state, and Figure 11(d) shows the force acting on the heavy load 200b in the fixed state. Note that hatching is omitted in Figure 11(d).

[0080] In the fourth embodiment, the weight attachment portion 300a is the same as in the third embodiment, and only the weight 200b is different from the third embodiment. In the weight 200b, the width W1 is equal to the distance D1. As a result, the weight 200b is fixed without tilting.

[0081] As shown in Fig. 11(c), in the fixed state, all contact portions are in surface contact. However, as shown in Fig. 11(d), the positions where stress is concentrated are the same as the contact portions in the third embodiment shown in Fig. 10(d). In this embodiment, the positions where stress is concentrated can be considered to be contact portions S1 to S4 and abutment portions T1 to T4.

[0082] In this embodiment, the arrangement of the first contact portion S1 to the fourth contact portion S4 is the same. The first contact portion S1 is located on one side of the inner member 204. The second contact portion S2 is located on the other side of the outer member 202. The third contact portion S3 is located on one side of the outer member 202. The fourth contact portion S4 is located on the other side of the inner member 204. In this embodiment, too, a rotational force is applied at the first contact portion S1 and the second contact portion S2, and rotation is prevented at the third contact portion S3 and the fourth contact portion S4. In this way, a rotational force is applied to the heavy load 200b from the first abutment portion T1 and the second abutment portion T2. ​​This rotational force is received by the third abutment portion T3 and the fourth abutment portion T4, thereby fixing the heavy load 200b.

[0083] Figures 12(a) to 12(d) show the heavy load 200c and the heavy load mounting portion 300a in the fifth embodiment. Figure 12(a) shows the dimensional relationship between the heavy load 200c and the heavy load mounting portion 300a, Figure 12(b) shows the non-fixed state, Figure 12(c) shows the fixed state, and Figure 12(d) shows the force acting on the heavy load 200c in the fixed state. Note that hatching is omitted in Figure 12(d).

[0084] In the fifth embodiment, the weight attachment portion 300a is the same as in the third embodiment, and only the weight 200c is different from the third embodiment. In the weight 200c, the width W1 is greater than the distance D1. As a result, the weight 200c is fixed tilted to the other side.

[0085] Because the direction of inclination is different, the contact portions in the fixed state are slightly different from those in the third embodiment (FIG. 10(c)). However, the arrangement of the first contact portion S1 to the fourth contact portion S4 is the same in this embodiment as well. The first contact portion S1 is located on one side of the inner member 204. The second contact portion S2 is located on the other side of the outer member 202. The third contact portion S3 is located on one side of the outer member 202. The fourth contact portion S4 is located on the other side of the inner member 204. In this embodiment as well, a rotational force is applied at the first contact portion S1 and the second contact portion S2, and rotation is prevented at the third contact portion S3 and the fourth contact portion S4. In this way, a rotational force is applied to the heavy load 200c from the first abutment portion T1 and the second abutment portion T2. ​​This rotational force is received by the third abutment portion T3 and the fourth abutment portion T4, thereby fixing the heavy load 200c.

[0086] FIG. 13 shows a heavy load 200d and a heavy load mounting portion 300a in the sixth embodiment. FIG. 13 shows the fixed state. The heavy load mounting portion 300a is as described in FIG. 9(a) and is the same as those in the third to fifth embodiments. The heavy load 200d has a shorter outer member 202 on the other side. Unlike the heavy loads 200a to 200c, the heavy load 200d can fall into the bottom 308 of the heavy load mounting portion 300a in the unlocked state. When the connecting member 206 is rotated, the protruding length V1 of the connecting member 206 from the inner member 204 changes. The deformation mechanism dm3 of the heavy load 200d is a mechanism that changes the protruding length V1 of the connecting member 206 from the inner member 204 while changing the relative positional relationship between the outer member 202 and the inner member 204.

[0087] When the connecting member 206 is rotated, the inner member 204 rises and approaches the outer member 202, and the tip of the connecting member 206 abuts against the bottom portion 308. When the connecting member 206 is further tightened, the tip of the connecting member 206 presses against the bottom portion 308, and one end of the inner member 204 presses against the edge of the downward surface 316. A rotational force is applied to the heavy load 200d as a reaction to these pressing forces. The rotational direction of the heavy load 200d due to this rotational force is counterclockwise in FIG. 13, which is the same as in the first to fifth embodiments. The portions to which this rotational force is applied are the first contact portion S1 and the second contact portion S2, and it is the first abutment portion T1 and the second abutment portion T2 that apply the rotational force to the heavy load 200d from these contact portions. In this embodiment, the tip of the connecting member 206 is the first contact portion S1, and the portion of the bottom portion 308 that abuts against the first contact portion S1 is the first abutment portion T1. Also, the portion of the inner member 204 that abuts against the edge of the downward surface 316 is the second contact portion S2, and the edge of the downward surface 316 is the second abutment portion T2.

[0088] Rotation of the heavy load 200d due to the rotational force is received by the vertical surfaces 320 and 312. The contact portion between one end of the outer member 202 and the vertical surface 312 is the third contact portion S3 of the heavy load 200d and the third contact portion T3 of the heavy load mounting portion 300a. The contact portion between the other end of the inner member 204 and the vertical surface 320 is the fourth contact portion S4 of the heavy load 200d and the fourth contact portion T4 of the heavy load mounting portion 300a. Rotation of the heavy load 200d is prevented by the third contact portion T3 and the fourth contact portion T4. In this way, a rotational force is applied to the heavy load 200d from the first contact portion T1 and the second contact portion T2. ​​This rotational force is received by the third contact portion T3 and the fourth contact portion T4, thereby fixing the heavy load 200d.

[0089] In this embodiment, in the fixed state, the other end of the outer member 202 is not in contact with the heavy load mounting portion 300a and is not involved in fixing the heavy load 200d.

[0090] Fig. 14 is a cross-sectional view showing a weight 600 and a weight attachment portion 500a according to the seventh embodiment, in which the weight 600 and the weight attachment portion 500a are fixed.

[0091] Unlike the heavy load 200, the heavy load 600 does not have an outer member and an inner member. The heavy load 600 has a main member 602 and a connecting member 604. In this embodiment, the connecting member 604 is a screw. The connecting member 604 is movably connected to the main member 602. By rotating the connecting member 604, the connecting member 604 moves relative to the main member 602. The connecting member 604 has a head 606 and an externally threaded portion 608. The externally threaded portion 608 of the connecting member 604 threadably engages with the main member 602 and penetrates the main member 602. Furthermore, the heavy load 600 has a secondary member 610. The secondary member 610 is attached to the head 606.

[0092] The weight attachment portion 500a is as described in FIG. 9(b).

[0093] One side of the main member 602 has a vertical surface 612 and an extending portion 614 that is below the vertical surface 612 and extends further to one side than the vertical surface 612. The vertical surface 612 is a surface that faces one side. The extending portion 614 constitutes an end portion on one side of the main member 602. The extending portion 614 is positioned opposite the downward surface 516. The vertical surface 612 is positioned opposite the vertical surface 518. An end portion 616 on the other side of the main member 602 is positioned opposite the vertical surface 520.

[0094] The deformation mechanism dm4 of the heavy load 600 is a mechanism that changes the length of the connecting member 604 that protrudes from the main member 602. When the connecting member 604 is rotated, the tip 618 of the connecting member 604 abuts against the bottom portion 508, while the main member 602 rises and the extension portion 614 approaches the downward surface 516. When the connecting member 604 is further tightened, the tip 618 of the connecting member 604 presses against the bottom portion 508, and the extension portion 614 of the main member 602 abuts against and presses against the downward surface 516. A rotational force is applied to the heavy load 600 as a reaction to these pressing forces. The rotational direction of the heavy load 600 due to this rotational force is counterclockwise in FIG. 14 . The portions to which these rotational forces are applied are the first contact portion S1 and the second contact portion S2, and the portions that apply the rotational forces to the heavy load 600 from these contact portions are the first abutment portion T1 and the second abutment portion T2. ​​In this embodiment, the first contact portion S1 is located at the tip portion 618 of the connecting member 604, and the portion of the bottom portion 508 that abuts against the first contact portion S1 is the first abutment portion T1. In addition, the corner of the extending portion 614 that abuts against the downward surface 516 is the second contact portion S2, and the portion of the downward surface 516 that abuts against the second contact portion S2 is the second abutment portion T2.

[0095] The rotation of the heavy load 600 caused by the rotational force is received by the vertical surfaces 520 and 518. The contact area between the vertical surfaces 612 and 518 is the third contact point S3 on the heavy load 600 and the third contact point T3 on the heavy load mounting portion 500a. The contact area between the end portion 616 and the vertical surface 520 is the fourth contact point S4 on the heavy load 600 and the fourth contact point T4 on the heavy load mounting portion 500a. The rotation of the heavy load 600 is prevented by the third contact point T3 and the fourth contact point T4. In this way, the heavy load 600 is applied with a rotational force from the first contact point T1 and the second contact point T2, and this rotational force is received by the third contact point T3 and the fourth contact point T4. The heavy load 600 is fixed when these forces are balanced. The secondary member 610 is not involved in fixing the heavy load 600.

[0096] Fig. 15 is a cross-sectional view showing a weight 700 and a weight attachment portion 500a according to the eighth embodiment, in which the weight 700 and the weight attachment portion 500a are fixed.

[0097] The weight 700 has an outer member 702, an inner member 704, and a connecting member 706. In this embodiment, the connecting member 706 is a screw. The connecting member 706 connects the outer member 702 and the inner member 704. The connecting member 706 has a head 708 and an externally threaded portion 710. The externally threaded portion 710 of the connecting member 706 threadably engages with the inner member 704 and penetrates the inner member 704. The outer member 702 holds the connecting member 706 rotatably. By rotating the connecting member 706, the relative positional relationship between the outer member 702 and the inner member 704 changes, and the protruding length of the connecting member 706 from the inner member 704 changes.

[0098] The weight attachment portion 500a is as described in FIG. 9(b).

[0099] The outer member 702 has a downward extension 712 on the other side thereof. The downward extension 712 has a lower end 714 that is located on the other side of the other end of the inner member 704. The lower end 714 is located at a position facing the vertical surface 520.

[0100] One side of the inner member 704 has a vertical surface 716 and an extending portion 718 that is below the vertical surface 716 and extends to one side beyond the vertical surface 716. The vertical surface 716 is a surface that faces one side. The extending portion 718 constitutes an end portion on one side of the inner member 704. The extending portion 718 is disposed in a position facing the downward surface 516. The vertical surface 716 is disposed in a position facing the vertical surface 518.

[0101] The deformation mechanism dm5 of the heavy load 700 is a mechanism that changes the protruding length of the connecting member 706 from the inner member 704 while changing the relative positional relationship between the outer member 702 and the inner member 704. When the connecting member 706 is rotated, the inner member 704 rises, the extending portion 718 approaches the downward surface 516, and the tip portion 720 of the connecting member 706 abuts against the bottom portion 508. When the connecting member 706 is further tightened, the tip portion 720 presses against the bottom portion 508, and the extending portion 718 abuts against the downward surface 516, pressing against the downward surface 516. A rotational force is applied to the heavy load 700 as a result of the reaction of these pressing forces. The rotational direction of the heavy load 700 due to this rotational force is counterclockwise in FIG. 15 . The portions to which these rotational forces are applied are the first contact portion S1 and the second contact portion S2, and the portions that apply the rotational forces to the heavy load 700 from these contact portions are the first abutment portion T1 and the second abutment portion T2. ​​In this embodiment, the first contact portion S1 is located at the tip portion 720 of the connecting member 706, and the portion of the bottom portion 508 that abuts against the first contact portion S1 is the first abutment portion T1. In addition, the corner of the extending portion 718 that abuts against the downward surface 516 is the second contact portion S2, and the portion of the downward surface 516 that abuts against the second contact portion S2 is the second abutment portion T2.

[0102] Rotation of the heavy load 700 caused by the rotational force is received by the vertical surfaces 520 and 518. The contact area between the vertical surfaces 716 and 518 is the third contact portion S3 of the heavy load 700 and the third contact portion T3 of the heavy load mounting portion 500a. The contact area between the lower end portion 714 and the vertical surface 520 is the fourth contact portion S4 of the heavy load 700 and the fourth contact portion T4 of the heavy load mounting portion 500a. Rotation of the heavy load 700 is prevented by the third contact portion T3 and the fourth contact portion T4. In this way, a rotational force is applied to the heavy load 700 from the first contact portion T1 and the second contact portion T2. ​​This rotational force is received by the third contact portion T3 and the fourth contact portion T4, thereby fixing the heavy load 700.

[0103] Figures 16(a) and 16(b) are cross-sectional views showing a heavy load 800 and a heavy load mounting portion 900 according to the ninth embodiment. Figure 16(b) shows the fixed state.

[0104] In the first to eighth embodiments described above, the weight has a deformation mechanism, whereas in the ninth embodiment, the weight attachment portion 900 has a deformation mechanism.

[0105] The weight mounting part 900 has a fixed part 902 and a movable part 904. The fixed part 902 is part of the head body. The movable part 904 is detachably fixed to the fixed part 902. The movable part 904 moves in the process of being attached to the fixed part 902 (see the imaginary lines and arrows in Figure 16(b)). The movable part 904 is fixed to the fixed part 902 with a screw 906. The weight mounting part 900 moves relative to the fixed part 902 when the movable part 904 is attached or detached. This movement causes the weight mounting part 900 to deform.

[0106] When the movable part 904 is fixed, the shape of the heavy load mounting part 900 is the same as the above-mentioned heavy load mounting part 300 (Figure 5). Therefore, the same reference numerals as those of the heavy load mounting part 300 are used. The heavy load mounting part 900 has a first wall part 304 and a second wall part 306. The second wall part 306 faces the first wall part 304. The first wall part 304 is a wall part on one side. The second wall part 306 is a wall part on the other side. Furthermore, the heavy load mounting part 900 has a bottom part 308. The bottom part 308 connects the lower end of the first wall part 304 and the lower end of the second wall part 306. The upper end of the first wall part 304 and the upper end of the second wall part 306 form the opening edge 310 of the heavy load mounting part 900 (see Figure 4). The first wall portion 304 has a vertical surface 312 facing the other side and a recessed portion 314 located below the vertical surface 312. The vertical surface 312 faces the second wall portion 306. The recessed portion 314 is recessed toward one side. The recessed portion 314 forms a downward surface 316 facing downward. The downward surface 316 faces the bottom portion 308. The second wall portion 306 has a vertical surface 320 facing one side and an upward surface 322 located above the vertical surface 320. The vertical surface 320 faces the first wall portion 304. The upward surface 322 extends to the other side beyond the vertical surface 320.

[0107] The first wall portion 304 is formed by a movable portion 904 .

[0108] The heavy load 800 has an outer portion 802 and an inner portion 804. The heavy load 800 does not have a deformation mechanism for deforming itself. In the portion that can come into contact with the heavy load mounting portion 900, the outer shape of the heavy load 800 is the same as that of the heavy load 200 in the fixed state (FIG. 7). Therefore, the same reference numerals as those of the heavy load 200 are used below.

[0109] The inner portion 804 has an upward surface 222 on one side thereof. The inner portion 804 has an extending portion 224 that fits into the recess 314 of the heavy load mounting portion 900. The extending portion 224 is an end portion on one side of the inner portion 804. The extending portion 224 includes a portion that extends further to one side than the end on one side of the outer portion 802. The upward surface 222 is the top surface of the extending portion 224.

[0110] The outer portion 802 has a downward surface 226 on the other side. The outer portion 802 has an extending portion 228 that extends above the upward surface 322. The extending portion 228 is the other end portion of the outer portion 802. The extending portion 228 includes a portion that extends further to the other side than the other end of the inner portion 804. The downward surface 226 is the bottom surface of the extending portion 228.

[0111] The outer portion 802 has a vertical surface 230 on one side thereof. The vertical surface 230 is a surface facing one side. The vertical surface 230 is an end surface on one side of the outer portion 802.

[0112] The inner portion 804 has a vertical surface 232 on the other side. The vertical surface 232 is the surface facing the other side. The vertical surface 232 is the end surface on the other side of the inner portion 804.

[0113] To fix the heavy load 800, the heavy load 800 is placed on the fixed part 902, and then the movable part 904 is attached to the fixed part 902. During this attachment process, the movable part 904 moves. During this movement, the vertical surface 312 of the movable part 904 abuts against the vertical surface 230, while the downward surface 316 presses against the upward surface 222. Once the fixing of the movable part 904 is complete, the same force acts on the heavy load 800 as on the fixed heavy load 200 (FIG. 7). Therefore, the heavy load 800 is fixed.

[0114] FIG. 17 is a schematic diagram illustrating the ninth embodiment. The heavy load mounting unit 900 has a fixed unit 902 and a movable unit 904. The movable unit 904 is attached to the fixed unit 902 while moving relative to the fixed unit 902. During the process of attaching the movable unit 904, the first contact portion T1 of the movable unit 904 presses the first contact portion S1 of the heavy load 800, and simultaneously, the second contact portion T2 of the fixed unit 902 presses the second contact portion S2 of the heavy load 800. As a result, a rotational force is applied to the heavy load 800. This rotation of the heavy load 800 is received by the third contact portion T3 and the fourth contact portion T4, preventing the rotation of the heavy load 800. As a result, the movable unit 904 is fixed in a predetermined position, and at the same time, the fixed state of the heavy load 800 is achieved. In this way, the transformation mechanism dm6 of the ninth embodiment is a mechanism in which a part of the heavy load mounting unit 900 (the movable unit 904) moves. The first contact portion S1 and the third contact portion S3 are located on the movable portion 904. The second contact portion S2 and the fourth contact portion S4 are located on the fixed portion 902. When the movable portion 904 moves, the first contact portion S1 and the second contact portion S2 are pressed against the heavy load mounting portion 900, and as a reaction to this, a rotational force is applied to the heavy load 800 from the first abutment portion T1 and the second abutment portion T2.

[0115] As described above, in each embodiment, the heavy load or the heavy load mounting portion has a deformation mechanism that deforms itself. In the first to eighth embodiments, the heavy load has the deformation mechanism. In the ninth embodiment, the heavy load mounting portion has the deformation mechanism.

[0116] When deformation occurs due to the deformation mechanism, a predetermined part of the heavy load is pressed against a predetermined part of the heavy load mounting part, and the reaction exerts a rotational force on the heavy load. This rotational force causes the heavy load to rotate, but other parts of the heavy load mounting part prevent this rotation. The rotational force and the rotation-preventing force are kept in balance, so the heavy load is fixed in place.

[0117] The deformation mechanism changes the relative positional relationship between the two locations. This relative position change is used to press the heavy load against the heavy load mounting portion at each of the two locations. This pressing portion can be a rotational force applying portion. In the first to ninth embodiments, the first abutment portion T1 and the second abutment portion T2 are the rotational force applying portions. This rotational force is a reaction to the force with which the heavy load is pressed against the heavy load mounting portion due to deformation by the deformation mechanism. Simultaneously with the application of this rotational force, the heavy load and the heavy load mounting portion are brought into contact at a location other than the rotational force applying portion, thereby preventing rotation of the heavy load. A portion that receives the rotation of the heavy load due to the rotational force and prevents the rotation of the heavy load is called a rotation preventing portion. The rotation preventing portion is located at a position that abuts against the heavy load when the rotational force is applied. In the first to ninth embodiments, the third abutment portion T3 and the fourth abutment portion T4 are the rotation preventing portions.

[0118] Figures 10(d), 11(d), and 12(d) show forces F1 to F4 that the weight receives from the weight attachment portion. Forces F1 to F4 represent components related to the rotation of the weight.

[0119] The heavy load is applied with force F1 from the first contact portion T1 and with force F2 from the second contact portion T2. ​​Forces F1 and F2 are rotational forces received from the rotational force application portion. Forces F1 and F2 constitute a force couple that rotates the heavy load. Forces F1 and F2 are reaction forces to the pressing force that the heavy load applies to the heavy load mounting portion via the deformation mechanism. Meanwhile, force F3 is applied to the heavy load from the third contact portion T3 and force F4 is applied from the fourth contact portion T4. Forces F3 and F4 are rotation-preventing forces received from the rotation-preventing portion. The rotation-preventing portion has a shape that can physically prevent the rotation of the heavy load. Forces F3 and F4 are generated as a reaction to the third contact portion S3 and the fourth contact portion S4 being pressed against the rotation-preventing portion. Forces F3 and F4 constitute a force couple that prevents the rotation of the heavy load. The force moments are balanced between the couple (F1, F2) that rotates the heavy load and the couple (F3, F4) that prevents rotation. The forces that the heavy load receives from each contact point also include components that are not related to rotation, but these forces are also balanced for the heavy load as a whole. As a result, the heavy load comes to rest while being subjected to rotational forces and rotation-preventing forces, and a fixed state is achieved. In the fixed state, a pressing force acts on the contact points between the heavy load and the heavy load mounting part. Therefore, static frictional force is increased at these contact points due to the pressing force. This static frictional force increases the fixation strength of the fixed state.

[0120] In Figure 10(d), the reference symbol z2 indicates the center line of rotation of the heavy load 200a caused by the rotational force. This center line z2 is perpendicular to the plane of the paper in Figure 10(d), and is therefore indicated by a dot. The position of the center line z2 is determined by the positional relationship between the rotational force imparting units T1 and T2 and the rotation-preventing units T3 and T4. Even in a case where the heavy load does not rotate, as in the fourth embodiment (Figures 11(a) to 11(d)), the rotation center line z2 can be identified by the positional relationship between the rotational force imparting units T1 and T2 and the rotation-preventing units T3 and T4.

[0121] Note that the rotation angle of the heavy load is small even in embodiments other than the fourth embodiment. For example, in the third embodiment (FIGS. 10(a) to 10(d)), the rotation angle of the heavy load 200a is small when transitioning from the unlocked state (FIG. 10(b)) to the locked state (FIG. 10(c)). In the unlocked state, the heavy load 200a is positioned in a normal position that allows it to transition to the locked state simply by operating the deformation mechanism. In this unlocked state, the gap between the heavy load 200a and the heavy load mounting portion 300a is small. Therefore, simultaneous contact between the rotational force imparting portions T1 and T2 and the rotation-preventing portions T3 and T4 can be achieved with only slight deformation. This facilitates operation of the deformation mechanism (rotation of the screws). The minimum rotation angle of the heavy load 200a when transitioning between the locked state and the unlocked state may be, for example, 7° or less, or even 5° or less, or even 3° or less. This minimum rotation angle is the minimum rotation angle required to transition from the locked state to the unlocked state. In determining this minimum rotation angle, the transition to the unlocked state can be confirmed when the rotational force caused by the deformation by the deformation mechanism becomes zero. As described above, the lower limit of the minimum rotation angle can be set to 0°. A small minimum rotation angle makes it easy to transition between the locked state and the unlocked state.

[0122] From the viewpoint of effectively applying a rotational force, it is preferable to apply forces in opposite directions to the heavy object from two locations. In the first to ninth embodiments, the rotational force application portion is distributed to two locations (first abutment portion T1, second abutment portion T2). By distributing the force to two locations, the moment of the rotational force becomes larger. Furthermore, from the viewpoint of effectively blocking the rotational force, it is preferable to apply forces in opposite directions to the heavy object from two locations. By distributing the force to two locations, the rotation of the heavy object is stably prevented. In the first to ninth embodiments, the rotation prevention portion is distributed to two locations (third abutment portion T3, fourth abutment portion T4).

[0123] It is preferable to arrange the first contact portion S1 (first abutment portion T1) on one side and the second contact portion S2 (second abutment portion T2) on the other side. The moment of rotation increases as the distance between them increases. Arranging the third contact portion S3 (third abutment portion T3) on one side and the fourth contact portion S4 (fourth abutment portion T4) on the other side effectively blocks rotation. The stability of the rotation blocking increases as the distance between them increases. However, the present disclosure is not limited to these arrangements. For example, in the embodiment of FIG. 8(b), the first abutment portion T1 and the second abutment portion T2 are relatively close. However, the abutment portions T1 and T2 are spaced apart from each other, allowing a rotational force to be generated. That is, the first abutment portion T1 and the second abutment portion T2 do not need to be distributed to one side and the other side. Similarly, the third abutment portion T3 and the fourth abutment portion T4 can be arranged relatively close to each other. That is, the third contact portion T3 and the fourth contact portion T4 do not have to be distributed to one side and the other side.

[0124] In the first embodiment (FIG. 7), the third embodiment (FIG. 10(c)), the fourth embodiment (FIG. 11(c)), and the fifth embodiment (FIG. 12(c)), the following arrangements (a1) to (a4) are adopted. (a1) The first contact portion S1 (first abutment portion T1) is located on one side of the inner member. (a2) The second contact portion S2 (second abutment portion T2) is located on the other side of the outer member. (a3) The third contact portion S3 (third abutment portion T3) is located on one side of the outer member. (a4) The fourth contact portion S4 (fourth abutment portion T4) is located on the other side of the inner member.

[0125] In this configuration, the positions of the four contact portions are effectively dispersed. The distance between the first contact portion S1 and the second contact portion S2 is increased, and the distance between the third contact portion S3 and the fourth contact portion S4 is also increased. This increases the moment of the rotational force and the rotation-preventing force, improving the fixing force for the heavy object in the fixed state.

[0126] In the second embodiment (FIG. 8(b)) and the sixth embodiment (FIG. 13), the following arrangements (b1) to (b4) are adopted. (b1) The first contact portion S1 (first abutment portion T1) is located at the tip end of the connecting member. (b2) The second contact portion S2 (second abutment portion T2) is located on one side of the inner member. (b3) The third contact portion S3 (third abutment portion T3) is located on one side of the outer member. (b4) The fourth contact portion S4 (third contact portion T4) is located on the other side of the inner member.

[0127] In this configuration, the tip of the connecting member can be pressed against the heavy load attachment portion, and the axial force of the connecting member can be directly converted into the rotational force of the heavy load. Also, the distance between the third abutment portion T3 and the fourth abutment portion T4 is increased, so that rotation can be stably prevented.

[0128] In the second embodiment (FIG. 8(b)), a fifth contact portion S5 (fifth abutment portion T5) is further provided on the other side of the outer member. On the other hand, in the sixth embodiment (FIG. 13), the other side of the outer member does not abut on the heavy load attachment portion and is not involved in the fixed state. Various configurations are possible depending on the geometric relationship between the heavy load and the heavy load attachment portion.

[0129] In the eighth embodiment (FIG. 15), the following arrangements (c1) to (c4) are adopted. (c1) The first contact portion S1 (first abutment portion T1) is located at the tip end of the connecting member. (c2) The second contact portion S2 (second abutment portion T2) is located on one side of the inner member. (c3) The third contact portion S3 (third abutting portion T3) is located on one side of the inner member and above the second contact portion S2 (second abutting portion T2). (c4) The fourth contact portion S4 (fourth abutment portion T4) is located on the other side of the outer member.

[0130] In the eighth embodiment (FIG. 15), a downward extending portion 712 is provided on the other side of the outer member, thereby adjusting the position of the fourth contact portion S4 (fourth abutment portion T4).

[0131] In the seventh embodiment (FIG. 14), the following arrangements (d1) to (d4) are adopted instead of a combination of an inner member and an outer member. (d1) The first contact portion S1 (first abutment portion T1) is located at the tip of the connecting member. (d2) The second contact portion S2 (second abutment portion T2) is located on one side of the main member. (d3) The third contact portion S3 (third abutment portion T3) is located on one side of the main member and above the second contact portion S2 (second abutment portion T2). (d4) The fourth contact portion S4 (fourth abutment portion T4) is located on the other side of the main member.

[0132] In this way, various configurations can be adopted for the heavy load and the heavy load attachment part. The shape and dimensions of the heavy load and the heavy load attachment part can be determined taking into consideration the reliability of fixation, the posture of the heavy load in the fixed state, the ease of molding the heavy load attachment part, etc.

[0133] In a heavy object having an outer member and an inner member, it is preferable to dispose the first contact portion S1 and the second contact portion S2 separately on each member. That is, when the inner member has the first contact portion S1, it is preferable that the outer member has the second contact portion S2. In this configuration, the positional relationship between the first contact portion S1 and the second contact portion S2 can be changed by changing the positional relationship between the outer member and the inner member. This makes it easy to transition between a fixed state and an unlocked state.

[0134] In a heavy object having an outer member and an inner member, it is preferable to disperse the third contact portion S3 and the fourth contact portion S4 among the respective members. That is, when the outer member has the third contact portion S3, it is preferable that the inner member has the fourth contact portion S4. In this configuration, the positional relationship between the third contact portion S3 and the fourth contact portion S4 can be changed by changing the positional relationship between the outer member and the inner member. This makes it easy to transition between a fixed state and an unlocked state.

[0135] It is preferable that the first contact portion S1 is located on one side of the heavy object, and the second contact portion S2 is located on the other side of the heavy object. In this case, the distance between the first contact portion T1 and the second contact portion T2 is increased, and the moment of rotational force can be increased. As a result, the force pressing the heavy object at the rotation prevention portion increases, and the reliability of the fixed state can be improved.

[0136] It is preferable that the third contact portion S3 is located on one side of the heavy object and the fourth contact portion S4 is located on the other side of the heavy object. In this case, the distance between the third contact portion T3 and the fourth contact portion T4 is large, and rotation of the heavy object can be stably prevented. This increases the reliability of the fixed state.

[0137] From the viewpoint of increasing the rotational force, it is preferable to employ two rotational force application portions that generate forces in opposite directions. In the first embodiment (FIG. 7), the first contact portion S1 abuts against the first abutment portion T1 from below, while the second contact portion S2 abuts against the second abutment portion T2 from above. In the second embodiment (FIG. 8(b)), the first contact portion S1 abuts against the first abutment portion T1 from above, while the second contact portion S2 abuts against the second abutment portion T2 from below. Therefore, the force from the first abutment portion T1 and the force from the second abutment portion T2 contain components in opposite directions. As a result, a rotational force (couple) is effectively generated.

[0138] To easily achieve the fixed state, the heavy load and the heavy load mounting portion are configured so that contact at the rotational force applying portion and contact at the rotation-preventing portion occur simultaneously. That is, the rotation-preventing portion is disposed at a position where it contacts the heavy load when the rotational force is applied by the rotational force applying portion.

[0139] The rotation prevention portion preferably has a shape that physically prevents rotation of the heavy object due to the rotational force. FIG. 18 is a cross-sectional view of the third embodiment, similar to FIG. 10(c). In FIG. 18, the double-headed arrow Ls indicates the distance between the third contact portion S3 and the fourth contact portion S4 in the fixed state. The distance Ls is equal to the distance Lt between the third contact portion T3 and the fourth contact portion T4. The distance between the third contact portion T3 and the fourth contact portion T4 when the heavy object overrotates by a small angle Δθ after passing the fixed state is the overrotation distance Lt1. The overrotation distance Lt1 is smaller than the distance Lt. That is, the overrotation distance Lt1 is smaller than the distance Ls. Therefore, this overrotation is prevented. The third contact portion T3 and the fourth contact portion T4 function as rotation prevention portions. This is an example of a shape that physically prevents rotation of the heavy object due to the rotational force.

[0140] As can be seen from the third embodiment (FIG. 10(c)), fourth embodiment (FIG. 11(c)), and fifth embodiment (FIG. 12(c)), the posture of the heavy load in the fixed state can be adjusted by adjusting the dimension between the heavy load and the heavy load mounting portion. Also, as in the fourth embodiment (FIG. 11(c)), the fixed state can be achieved without rotating the heavy load 200. The fixing structure of the present disclosure has excellent design freedom in the fixed state.

[0141] In the first embodiment (FIG. 7), the fourth embodiment (FIG. 11(c)), and the ninth embodiment (FIG. 16), the contact at each contacting portion in the fixed state is surface contact. In other embodiments, the contact at each contacting portion in the fixed state is point contact in the drawings, but is actually line contact. Surface contact can be achieved by adjusting the shape of each contacting portion in consideration of the posture of the heavy object in the fixed state. Surface contact can suppress wear and damage at the contacting portion and can achieve stable fixation. Line contact (or point contact) can increase the contact pressure and improve the static friction force.

[0142] As described above, in the first embodiment, the heavy load mounting portion 300 forms the groove 302. The cross-sectional structure of the heavy load mounting portion 300 shown in FIG. 5 is the same at each position in the extension direction of the groove 302. Therefore, in the non-fixed state, the heavy load mounting portion 300 can move within the groove 302. Also, a fixed state can be achieved at each position in the groove 302. In the second to ninth embodiments, the fixing position of the heavy load can be changed by extending the heavy load mounting portion without changing the cross-sectional shape.

[0143] The greater the range of movement of the weight, the greater the degree of freedom in adjusting the center of gravity of the head. This range of movement preferably includes a position on the toe side of the center of gravity of the head to a position on the heel side of the center of gravity of the head. Also, this range of movement preferably includes a position on the toe side of the face center to a position on the heel side of the face center. The position of the weight can be the position of the center of gravity of the weight.

[0144] The direction of rotation of the weight caused by the rotational force is substantially perpendicular to the direction of movement of the weight. In other words, the rotation center line z2 (FIG. 10(d)) of the weight caused by the rotational force is substantially parallel to the direction of movement of the weight. The direction of movement of the weight can be taken as the direction of the locus line L1 of the weight's center of gravity (see FIG. 1). If the locus line L1 is a curve, the tangent to the locus line L1 is taken into consideration. For a weight at a predetermined position, the point on the locus line L1 closest to the center of gravity of the weight is determined. The angle formed between the tangent to the locus line L1 at that point and the center line z2 of the weight at the predetermined position is determined. If the absolute value of this angle is 10° or less, the rotation center line z2 can be taken as substantially parallel to the direction of movement of the weight.

[0145] A possible structure for fixing a heavy load is one in which the heavy load mounting portion is sandwiched between an outer member and an inner member. In this structure, it is necessary to form a protrusion on the heavy load mounting portion that is sandwiched between the outer member and the inner member. In this case, the shape of the heavy load mounting portion becomes complex, and the number of undercut portions may increase. As a result, the number of divisions in the mold for molding the heavy load mounting portion may increase. On the other hand, in the above embodiment, the structure of the heavy load mounting portion may be simplified.

[0146] In the second embodiment (FIG. 8(b)), the sixth embodiment (FIG. 13), the seventh embodiment (FIG. 14), and the eighth embodiment (FIG. 15), in the fixed state, the connecting member (or the joining member) abuts against the heavy load mounting portion. In this case, the axial force of the connecting member (or the joining member) can press against the heavy load mounting portion, and the abutment portion can be used as a rotational force imparting portion (first abutment portion T1).

[0147] In the first embodiment (FIG. 7), the third embodiment (FIG. 10(c)), the fourth embodiment (FIG. 11(c)), and the fifth embodiment (FIG. 12(c)), the connecting member does not abut against the heavy load mounting portion in the fixed state. In this case, the abutment portion with a portion other than the connecting member can be used as the rotational force applying portion (first abutment portion T1).

[0148] The deformation mechanism may be provided in the heavy load as in the first to eighth embodiments, or in the heavy load mounting portion as in the ninth embodiment. In the first to eighth embodiments, the heavy load is deformed by the screw mechanism to press the heavy load mounting portion, and a rotational force is obtained by the reaction of this pressure.

[0149] In the first embodiment (FIG. 7), the third embodiment (FIG. 10(c)), the fourth embodiment (FIG. 11(c)), and the fifth embodiment (FIG. 12(c)), a configuration is adopted in which the heavy load attachment portion is located on one side and above the inner member and on the other side and below the outer member. In this case, by reducing the distance between the inner member and the outer member, one side and above the inner member and the other side and below the outer member are pressed against the heavy load attachment portion, thereby generating a rotational force. Alternatively, for example, the rotational force can be generated by increasing the distance between the inner member and the outer member. In this case, for example, a configuration in which the heavy load attachment portion is located on one side and below the inner member and on the other side and above the outer member can be adopted. A rotational force is generated by configuring the heavy load attachment portion so that forces in opposite directions are applied at two locations spaced apart from each other. Then, a fixed state can be achieved by configuring the heavy load attachment portion to receive and block this rotational force. Heavy loads and heavy load attachment portions with various configurations can be designed based on the present disclosure.

[0150] The deformation mechanism that changes the relative positional relationship between the outer member and the inner member is not limited to a screw mechanism, and any known mechanism may be used. For example, an alternate mechanism that performs alternate operations may be used. This alternate mechanism is generally used with a push button or the like. This alternate mechanism allows the two members to be switched between a close state and a far state with a single touch.

[0151] As an example in which the weight attachment portion has a deformation mechanism, in addition to the ninth embodiment, a configuration in which the movable portion 904 of the ninth embodiment is attached so as to be slidable can be considered.

[0152] The following notes are part of the inventions contained in this disclosure. [Appendix 1] a weight and a weight mounting portion provided on an outer surface of the head to which the weight is attached, The weight can be shifted between a fixed state and an unfixed state at the weight attachment portion, The weight or the weight attachment portion has a deformation mechanism that deforms itself, The heavy object mounting portion is a rotational force applying unit that applies a rotational force to the heavy object in reaction to the weight being pressed by the deformation; a rotation prevention part that is disposed at a position that contacts the heavy object when the rotational force is applied, and that receives the rotation of the heavy object due to the rotational force and prevents the rotation of the heavy object; It has The fixed state is achieved by maintaining the state in which the heavy object is pressed against the rotation preventing portion by the rotational force. [Appendix 2] the weight has a first contact portion, a second contact portion, a third contact portion, and a fourth contact portion spaced apart from one another; the heavy load mounting portion has a first abutment portion and a second abutment portion that abut against the first contact portion and the second contact portion, respectively, in the fixed state to apply the rotational force to the heavy load, and a third abutment portion and a fourth abutment portion that are pressed against the third contact portion and the fourth contact portion of the heavy load, respectively, by the rotational force, thereby preventing the rotation of the heavy load, 2. The golf club head according to claim 1, wherein the first contact portion and the second contact portion are the rotational force imparting portion, and the third contact portion and the fourth contact portion are the rotation preventing portion. [Appendix 3] the heavy object has an outer member, an inner member, and a connecting member that connects the outer member and the inner member, the deformation mechanism is a mechanism that changes the relative positional relationship between the inner member and the outer member, the first contact portion is located on one side of the inner member, the second contact portion is located on the other side of the outer member, the third contact portion is located on one side of the outer member, the fourth contact portion is located on the other side of the inner member, A golf club head as described in Appendix 2, wherein the outer member and the inner member are configured to approach each other so that the rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion. [Appendix 4] the heavy object has an outer member, an inner member, and a connecting member that connects the outer member and the inner member, the weight has the deformation mechanism, the deformation mechanism is a mechanism that changes the relative positional relationship between the outer member and the inner member while changing the protruding length of the connecting member from the inner member, the first contact portion is located at a tip end of the connecting member, the second contact portion is located on one side of the inner member, the third contact portion is located on one side of the outer member, the fourth contact portion is located on the other side of the inner member, A golf club head as described in Appendix 2, wherein the outer member and the inner member are configured to approach each other so that the rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion. [Appendix 5] the heavy object has an outer member, an inner member, and a connecting member that connects the outer member and the inner member, the weight has the deformation mechanism, the deformation mechanism is a mechanism that changes the relative positional relationship between the outer member and the inner member while changing the protruding length of the connecting member from the inner member, the first contact portion is located at a tip end of the connecting member, the second contact portion is located on one side of the inner member, the third contact portion is located on one side of the inner member and above the second contact portion, the fourth contact portion is located on the other side of the outer member, A golf club head as described in Appendix 2, which is configured such that when the protruding length increases and the tip of the connecting member abuts against the weight mounting portion, a rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion. [Appendix 6] the weight has a main member and a connecting member movably connected to the main member, the deformation mechanism is a mechanism for changing the protrusion length of the connecting member from the main member, the first contact portion is located at a tip end of the coupling member, the second contact portion is located on one side of the main member, the third contact portion is located on one side of the main member and above the second contact portion, the fourth contact portion is located on the other side of the main member, A golf club head as described in Appendix 2, which is configured such that when the protruding length increases and the tip of the connecting member abuts against the weight mounting portion, a rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion. [Appendix 7] the weight attachment portion has a fixed portion and a movable portion, the deformation mechanism is a mechanism by which the movable part moves, the first contact portion and the third contact portion are located on the movable portion, the second contact portion and the fourth contact portion are located on the fixed portion, A golf club head as described in Appendix 2, in which the movement of the movable part presses the first contact part S1 and the second contact part S2 against the weight object mounting part, and the reaction thereto applies the rotational force from the first abutment part and the second abutment part to the weight object. [Appendix 8] The weight attachment portion forms a groove, In the non-fixed state, the weight can move within the groove, 8. The golf club head according to any one of claims 1 to 7, wherein the fixed state is achieved at each position in the groove. [Appendix 9] It has a sole part, 9. The golf club head according to any one of claims 1 to 8, wherein the weight attachment portion is provided on the sole portion. [Explanation of symbols]

[0153] 100···Golf club head 102, 122 Head body 104···Face part 106 Crown 108···Sole part 110···Hosel part 120···Golf club head 200, 200a, 200b, 200c, 200d...heavy weight 202...Outer member 204 Inner member 206 Connecting member 300, 300a... Heavy load mounting part 302...Groove 400...heavy load 402···Outer Components 404 inner material 406···Connecting Components 500, 500a···Heavy items collection and delivery department 600··· weight 602···Main parts 604···· Bonding Material 700··· weight 702···Outer Components 704 inner material 706···Connecting Components 800... weight 900···Heavy items collection and payment department 902···Fixed Part 904···Moveable Part S1···First Contact Section S2···Second Contact Section S3···Third Contact Section S4··· Fourth Contact Section T1···First Receiving Section T2···Second Receiving Section T3...The 3rd Reception Section T4...The 4th Reception Section dm1, dm2, dm3, dm4, dm5, dm6... transforming mechanisms z1···Return Centerline

Claims

1. a weight and a weight mounting portion provided on an outer surface of the head to which the weight is attached, The weight can be shifted between a fixed state and an unfixed state at the weight attachment portion, The weight or the weight attachment portion has a deformation mechanism that deforms itself, The heavy object mounting portion is a rotational force applying unit that applies a rotational force to the heavy object in reaction to the weight being pressed by the deformation; a rotation prevention part that is disposed at a position that contacts the heavy object when the rotational force is applied, and that receives the rotation of the heavy object due to the rotational force and prevents the rotation of the heavy object; It has the fixed state is achieved by maintaining a state in which the heavy object is pressed against the rotation preventing portion by the rotational force, the weight has a first contact portion, a second contact portion, a third contact portion, and a fourth contact portion spaced apart from one another; the heavy load mounting portion has a first abutment portion and a second abutment portion that abut against the first contact portion and the second contact portion, respectively, in the fixed state to apply the rotational force to the heavy load, and a third abutment portion and a fourth abutment portion that are pressed against the third contact portion and the fourth contact portion, respectively, of the heavy load by the rotational force, thereby preventing the rotation of the heavy load, The golf club head includes the first and second contact portions serving as the rotational force applying portions, and the third and fourth contact portions serving as the rotation preventing portions.

2. the heavy object has an outer member, an inner member, and a connecting member that connects the outer member and the inner member, the deformation mechanism is a mechanism that changes the relative positional relationship between the inner member and the outer member, the first contact portion is located on one side of the inner member, the second contact portion is located on the other side of the outer member, the third contact portion is located on one side of the outer member, the fourth contact portion is located on the other side of the inner member, 2. The golf club head of claim 1, wherein the outer member and the inner member approach each other so that the rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion.

3. the heavy object has an outer member, an inner member, and a connecting member that connects the outer member and the inner member, the weight has the deformation mechanism, the deformation mechanism is a mechanism that changes the relative positional relationship between the outer member and the inner member while changing the protruding length of the connecting member from the inner member, the first contact portion is located at a tip end of the connecting member, the second contact portion is located on one side of the inner member, the third contact portion is located on one side of the outer member, the fourth contact portion is located on the other side of the inner member, 2. The golf club head of claim 1, wherein the outer member and the inner member approach each other so that the rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion.

4. the heavy object has an outer member, an inner member, and a connecting member that connects the outer member and the inner member, the weight has the deformation mechanism, the deformation mechanism is a mechanism that changes the relative positional relationship between the outer member and the inner member while changing the protruding length of the connecting member from the inner member, the first contact portion is located at a tip end of the connecting member, the second contact portion is located on one side of the inner member, the third contact portion is located on one side of the inner member and above the second contact portion, the fourth contact portion is located on the other side of the outer member, 2. A golf club head as described in claim 1, wherein the protruding length is increased and the tip of the connecting member abuts the weight mounting portion, so that a rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion.

5. the weight has a main member and a connecting member movably connected to the main member, the deformation mechanism is a mechanism for changing the protrusion length of the connecting member from the main member, the first contact portion is located at a tip end of the coupling member, the second contact portion is located on one side of the main member, the third contact portion is located on one side of the main member and above the second contact portion, the fourth contact portion is located on the other side of the main member, 2. A golf club head as described in claim 1, wherein the protruding length is increased and the tip of the connecting member abuts the weight mounting portion, so that a rotational force is applied to the weight from the first abutment portion and the second abutment portion of the weight mounting portion.

6. the weight attachment portion has a fixed portion and a movable portion, the deformation mechanism is a mechanism by which the movable part moves, the first contact portion and the third contact portion are located on the movable portion, the second contact portion and the fourth contact portion are located on the fixed portion, 2. The golf club head of claim 1, wherein the first contact portion and the second contact portion are pressed against the weight mounting portion when the movable portion moves, and the rotational force is applied to the weight from the first abutment portion and the second abutment portion as a reaction to this.

7. The weight attachment portion forms a groove, In the non-fixed state, the weight can move within the groove, The golf club head of claim 1 , wherein the fixed state is achieved at each position in the groove.

8. It has a sole part, 8. The golf club head according to claim 1, wherein the weight attachment portion is provided on the sole portion.

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