Golf club

Abstract

To improve a hitting feel regarding a golf club and an insert for the golf club.SOLUTION: A golf club 1 of the disclosure comprises a head 3 that has a hitting surface 2 for hitting a golf ball, a shaft 5 that is formed like a shaft, a hosel 4 for connecting one end of the shaft 5 and the head 3 together, and a grip 6 that is provided at the other end of the shaft 5 so as to be held by a user. The hosel 4 is formed integrally with the head 3 and the shaft 5 in an unreplaceable state.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a golf club for hitting a golf ball and an insert for a golf club that is detachably provided on the golf club.

Background Art

[0002] Conventionally, in golf clubs such as woods, irons, hybrids, utilities, and putters, those in which a shaft provided with a grip and a head are connected by a hosel are known. The hosel is fixed detachably to, for example, the shaft or the head. With such a structure, it becomes easy to replace the shaft or the head (see Patent Documents 1 and 2). Also, golf clubs without a hosel, that is, golf clubs in which a shaft with a grip and a head are connected, have been generally known conventionally.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the case of a golf club with a hosel, the vibrations generated in the club head when the golf ball is struck are transmitted through the shaft to the user's (golfer's) palm as they grip the club, and are perceived as part of the feel of the club. On the other hand, the hosel, which is interposed between the shaft and the head, can act to hinder the transmission of such vibrations. Therefore, golf clubs with hosels have the challenge of making it more difficult to achieve a good feel compared to golf clubs without hosels. The term "feel" refers to the sensation or shot feel that the user experiences when striking the golf ball. Generally, the feel of a golf club includes not only physical vibrations but also sensory pleasures (feelings) such as the feel of the shot, the sense of control, and the sense of accomplishment. Furthermore, even with golf clubs that lack a hosel, there is the challenge of not being able to achieve a good feel without some kind of modification.

[0005] One of the objectives of this invention is to provide a golf club and a golf club insert that improve the feel of the ball, as devised in light of the above-mentioned problems. In addition, other objectives of this invention include achieving effects that cannot be obtained with conventional technology, derived from the various configurations shown in the "Modes for Carrying Out the Invention" described later. [Means for solving the problem]

[0006] This can be realized in the manner or application described below. The disclosed golf club and golf club insert solve at least part of the above-mentioned problems. (1) The disclosed golf club comprises a head having a striking surface for striking a golf ball, a shaft formed in an axial shape, a hosel connecting one end of the shaft to the head, and a grip provided at the other end of the shaft for the user to hold, wherein the hosel is formed integrally with the head and the shaft in a non-replaceable manner.

[0007] (2) It is preferable that the hosel is formed in a plate shape that is extended in a plane direction parallel to the striking surface and has a certain thickness. (3) It is preferable that the hosel is formed in the shape of a rectangular flat plate. (4) It is preferable that the hosel is formed in a curved plate shape such that the side closer to the striking surface is on the inside in a longitudinal cross section perpendicular to the striking surface.

[0008] (5) Preferably, the hosel incorporates a vibration sensor that detects vibrations generated on the striking surface. (6) It is preferable that the hosel has a first hollow cavity formed inside. It is also preferable to form an opening for transmitting the resonant sound inside the hosel to the outside of the hosel.

[0009] (7) Preferably, the shaft has a second hollow cavity inside which is formed to communicate with the first cavity. (8) Preferably, the grip has a third hollow cavity inside which is formed to communicate with the second cavity. (9) Preferably, the grip is formed integrally with the shaft.

[0010] (10) Preferably, the grip incorporates a vibration device that vibrates based on information detected by the vibration sensor or a speaker that emits sound. (11) Preferably, the device comprises a vibration transmission member formed in an elongated shape, with one end fixed to the head, and housed in the second cavity and the third cavity, which transmits vibrations generated on the striking surface to the grip, and a mounting member provided inside the third cavity, which connects the other end of the vibration transmission member to the grip.

[0011] (12) Preferably, the mounting member is provided so as to be adjustable in the extending direction of the grip. (13) Preferably, the vibration transmission member is composed of a wire, a string, a rod member, or a linear elastic member. (14) Preferably, the mounting member is formed in a film-like shape that unfolds in a direction intersecting the extending direction of the grip.

[0012] (15) Preferably, the vibration transmission member has a mass member for amplifying vibrations. (16) Preferably, the head has a fourth hollow cavity inside which is formed to be in communication with the first cavity. (17) Preferably, an auxiliary vibration transmission member is provided inside the four cavities and transmits vibrations generated on the striking surface to the vibration transmission member.

[0013] (18) Preferably the head has a weight member for changing the center of gravity of the head. (19) Preferably, the head is provided with a drive source for moving the weight member, wherein the weight member is located inside a hollow cylindrical recess formed in the upper surface of the head, and the drive source rotates the weight member along the inner circumferential surface of the recess.

[0014] (20) The disclosed golf club comprises a shaft, a head provided at one end of the shaft and having a surface for striking a golf ball, and a grip provided at the other end of the shaft, wherein the shaft has a hollow shaft cavity inside, and the grip has a hollow grip cavity inside that communicates with the shaft cavity, and comprises a vibration transmitting member formed in an elongated shape with one end fixed to the head, and built into the shaft cavity and the grip cavity, which transmits vibrations generated on the striking surface to the grip, and a mounting member provided inside the grip cavity which connects the other end of the vibration transmitting member to the grip.

[0015] (21) Preferably, the mounting member is provided so as to be adjustable in the extending direction of the grip. (22) Preferably, the vibration transmission member is composed of a wire, a string, a rod member, or a linear elastic member. (23) Preferably, the attachment member is formed in a film shape that is deployed in a direction intersecting the extending direction of the grip. (24) Preferably, the vibration transmission member has a mass member for amplifying vibration.

[0016] (25) Preferably, the head has a head cavity formed hollow and communicating with the shaft cavity inside, and an auxiliary vibration transmission member provided inside the head cavity for transmitting the vibration generated on the striking surface to the vibration transmission member. (26) The disclosed golf club is a golf club comprising a shaft, a head provided at one end of the shaft and having a striking surface for a golf ball, and a grip provided at the other end of the shaft, wherein the shaft has a shaft cavity formed hollow inside, the grip has a grip cavity formed hollow and communicating with the shaft cavity inside, is formed in a long shape and one end is fixed to the head, includes a vibration transmission member built in the shaft cavity and the grip cavity for transmitting the vibration generated on the striking surface to the grip, and an attachment member provided inside the grip cavity for connecting the other end of the vibration transmission member and the grip, the vibration transmission member is configured to contain a magnetic material, and a first pickup for detecting the vibration transmitted by the vibration transmission member and electrically converting it is provided close to the vibration transmission member.

[0017] (27) Preferably, the attachment member is provided such that its position can be adjusted in the extending direction of the grip. (28) Preferably, the attachment member is formed in a film shape that is deployed in a direction intersecting the extending direction of the grip. (29) Preferably, the vibration transmission member has a mass member for amplifying vibration.

[0018] (30) The head has a head cavity formed to be hollow and communicating with the shaft cavity, and includes an auxiliary vibration transmission member provided inside the head cavity and configured to transmit vibrations generated on the hitting surface to the vibration transmission member. The auxiliary vibration transmission member is composed of a magnetic material, and a second pickup for detecting vibrations transmitted by the auxiliary vibration transmission member and converting them into electrical signals is preferably provided close to the auxiliary vibration transmission member.

[0019] (31) A first amplifier for amplifying the electrical signal detected by the first pickup is preferably provided inside or outside the golf club. (32) A second amplifier for amplifying the electrical signal detected by the second pickup is preferably provided inside or outside the golf club.

[0020] (33) The disclosed golf club is a golf club including a shaft, a head provided at one end of the shaft and having a hitting surface for a golf ball, and a grip provided at the other end of the shaft. The golf club includes an insert composed of a surface vibration member provided on the hitting surface, which vibrates in a plane due to a collision with the golf ball and applies a reaction force to the golf ball.

[0021] (34) The surface vibration member preferably has a net member formed by knitting strings in a net shape inside a frame. (35) The string preferably includes at least one of natural fiber, synthetic fiber, and elastic fiber. (36) The surface vibration member preferably has a film member attached to the hitting surface.

[0022] (37) The film member preferably includes at least one of a metal plate, a resin plate, a rubber film, and a leather film. (38) The surface vibration member is preferably provided detachably with respect to the head. (39) The head preferably has a head cavity formed to be hollow inside. (40) Preferably, the head has an internal wire that is stretched inside the head cavity and connected to the surface vibrating member via a connecting wire.

[0023] (41) It is preferable that the shaft has a shaft cavity formed to be hollow inside. (42) Preferably, the head has a shaft wire that is stretched inside the shaft cavity and connected to the head's internal wire. (43) Preferably, the wire inside the shaft is stretched so as to connect the grip and the wire inside the head, thereby transmitting the vibration of the surface vibrator to the grip.

[0024] (44) The disclosed golf club comprises a head having a striking surface for striking a golf ball, a shaft formed in an axial shape, a hosel connecting one end of the shaft to the head, and a grip provided at the other end of the shaft for the user to hold, with a fin or plate member between the head and the hosel. (45) The disclosed golf club comprises a head having a striking surface for striking a golf ball, a shaft formed in an axial shape, and a grip provided at the other end of the shaft for being held by the user, with a fin or plate member between the head and one end of the shaft.

[0025] (46) It is preferable that the lighting members are arranged in a planar or chain-like manner on the top surface of the fin or plate member described above. (47) It is preferable that fins are erected on the upper surface of the head. (48) It is preferable that the lighting members are arranged in a planar or chain-like manner on the top surface of the fins described above.

[0026] (49) Preferably, an electric display member is provided on the upper surface of the head. (50) Preferably, the display member is a liquid crystal display capable of displaying at least one piece of information from the launch direction of the golf ball and the impact data when the golf ball hits the striking surface, in response to an external instruction. (51) When the golf ball is launched, it is preferable to provide a controller having a rhythm box function that indicates the rhythm, and a speaker that outputs either a rhythm sound or a synthesized voice generated by either the rhythm box function or the synthesized voice generation function of the controller. (52) It is preferable that an adapter suitable for the user's physique and batting form be detachably attached to the lower surface of the head.

[0027] (53) The disclosed golf club insert is an insert detachably provided on the striking surface of a golf club comprising a shaft, a head provided at one end of the shaft and having a striking surface for a golf ball, and a grip provided at the other end of the shaft, and has a planar vibrating member that vibrates upon collision with the golf ball and provides a reaction force to the golf ball. (54) Preferably, the surface vibrating member of this insert has a net member formed by weaving strings in a net-like manner inside the frame.

[0028] (55) Preferably, the string of this insert contains at least one of natural fibers, synthetic fibers, or elastic fibers. (56) Preferably, the surface vibrating member of this insert has a film member that is attached to the striking surface. (57) Preferably, the film member of this insert includes at least one of a metal plate, a resin plate, a rubber film, and a leather film. (58) It is preferable that the surface vibrating member of this insert is configured as a vibrating member having a gong structure that is attached to the head by a suspension structure. [Effects of the Invention]

[0029] According to the disclosed golf club, by integrally integrating the hosel between the head and shaft in a non-replaceable manner, vibrations generated in the head when the golf ball is struck can be efficiently transmitted to the shaft, thereby improving the feel of the shot.

[0030] Furthermore, according to the disclosed golf club, even without a hosel, various modifications to the golf club can efficiently transmit vibrations generated in the head when hitting the golf ball to the shaft, thereby improving the feel of the shot.

[0031] Furthermore, according to the disclosed golf club insert, in a golf club without a hosel, by providing this insert on the head striking surface, vibrations generated in the head during impact can be efficiently transmitted to the shaft, thereby improving the feel of the shot. [Brief explanation of the drawing]

[0032] [Figure 1] (A) is a perspective view illustrating a golf club as a first embodiment, and (B) is a side view illustrating a modified example of the golf club as a first embodiment. [Figure 2] (A) to (C) are perspective views illustrating the types of golf club heads as a first embodiment. [Figure 3] Figures (A) to (F) are perspective views illustrating a modified example of a golf club hosel as a first embodiment. [Figure 4] (A) to (D) are perspective views illustrating a modified example of a golf club hosel as a first embodiment. [Figure 5] (A) to (E) are side views illustrating a modified example of a golf club hosel as a first embodiment. [Figure 6] (A) and (B) are cross-sectional views illustrating the internal structure of a golf club as a first embodiment. [Figure 7] (A) and (B) are cross-sectional views illustrating a modified version of the golf club as a first embodiment. [Figure 8] (A) and (B) are cross-sectional views illustrating a modified version of the golf club as a first embodiment. [Figure 9] (A) and (B) are cross-sectional views illustrating a modified version of the golf club as a first embodiment. [Figure 10] This is a cross-sectional view illustrating a modified example of a golf club as a first embodiment. [Figure 11] This is a cross-sectional view illustrating a modified example of a golf club as a first embodiment. [Figure 12] This is a cross-sectional view illustrating a modified example of a golf club as a first embodiment. [Figure 13] This is a cross-sectional view illustrating a modified example of a golf club as a first embodiment. [Figure 14] (A) and (B) are perspective views illustrating a modified golf club head as a first embodiment. [Figure 15] This is a perspective view illustrating a modified example of a golf club as a first embodiment. [Figure 16] Figures (A) to (E) are perspective views illustrating a modified version of the golf club as a first embodiment. [Figure 17] (A) to (H) are top views illustrating a modified version of the golf club as a first embodiment. [Figure 18] (A) and (B) are cross-sectional views illustrating a modified version of the golf club as a first embodiment. [Figure 19] This is a cross-sectional view illustrating a golf club as a second embodiment. [Figure 20] This is a cross-sectional view illustrating a modified example of a golf club as a second embodiment. [Figure 21] This is a cross-sectional view illustrating a modified example of a golf club as a second embodiment. [Figure 22] This is a cross-sectional view illustrating a modified example of a golf club as a second embodiment. [Figure 23] This is a disassembled perspective view of a golf club as a third embodiment. [Figure 24] This is a perspective view of a golf club net component as a third embodiment. [Figure 25] This is a cross-sectional view of a golf club as a third embodiment. [Figure 26] This is a cross-sectional view illustrating a modified example of a golf club as a third embodiment. [Figure 27] This is a perspective view illustrating a golf club as a fourth embodiment. [Figure 28] (A) and (B) are perspective views illustrating a modified version of the golf club as a fourth embodiment. [Figure 29] This is a cross-sectional view illustrating a golf club as a fifth embodiment. [Figure 30] This is a cross-sectional view illustrating a modified example of a golf club as a fifth embodiment. [Figure 31] This is a cross-sectional view illustrating a modified example of a golf club as a fifth embodiment. [Figure 32] This is a cross-sectional view illustrating a modified example of a golf club as a fifth embodiment. [Figure 33] This is a cross-sectional view illustrating a modified example of a golf club as a fifth embodiment. [Figure 34] This is a cross-sectional view illustrating a modified example of a golf club as a fifth embodiment. [Figure 35] This is a cross-sectional view illustrating a modified example of a golf club as a fifth embodiment. [Figure 36] This is a processing block diagram applied to a golf club as a fifth embodiment. [Figure 37] (A) is a partial perspective view showing a golf club as the sixth embodiment, and (B) is a partial perspective view showing a modified example of the golf club as the sixth embodiment. [Figure 38] This is a processing block diagram applied to a golf club as the sixth embodiment. [Figure 39] (A) and (B) are side views illustrating a golf club as a modified example of the first to sixth embodiments. [Modes for carrying out the invention]

[0033] [I. Description of the First Embodiment] [1.Basic structure] Figure 1(A) is a perspective view illustrating a golf club 1 (putter) as a first embodiment. This golf club 1 comprises a head 3, a hosel 4, a shaft 5, and a grip 6. The side of the head 3 is provided with a striking surface 2 (face) for striking a golf ball. As shown in Figure 1(B), the hosel 4 and the head 3 may be arranged to be flush with the striking surface 2 (forming the same plane). It goes without saying that in the following examples of various arrangements of the hosel 4 and the head 3, the hosel 4 and the head 3 may also be arranged to be flush with the striking surface 2 as shown in Figure 1(B). Figures 2(A) to 2(C) are perspective views illustrating the different types of putter heads 3. The shape of head 3 may be a pin type as shown in Figure 2(A), a mallet type as shown in Figure 2(B), or a neo-mallet type as shown in Figure 2(C).

[0034] The shaft 5 is formed in an axial shape (a long, slender rod shape), and one end of it (the lower end in Figure 1) is connected to the head 3 via the hosel 4. The cross-sectional shape of the shaft 5 may be circular, elliptical, or polygonal. The grip 6, which is the part held by the user, is provided at the other end of the shaft 5 (the upper end in Figure 1). Similar to the shaft 5, the cross-sectional shape of the grip 6 may be circular, elliptical, or polygonal.

[0035] The hosel 4 is formed in a plate shape with a constant thickness, extending in a plane parallel to the striking surface 2. The hosel 4 is formed integrally with the head 3 and shaft 5, for example, in a non-replaceable state. The shaft 5 may be connected to the end face of the hosel 4, as shown in Figure 3(A), or to the plate surface of the hosel 4, as shown in Figure 3(B). The thickness of the hosel 4 (dimension in the plate thickness direction) can be set independently of the diameter of the shaft 5. If the shaft 5 is thicker than the thickness of the hosel 4, the cross-sectional area of ​​the lower end of the shaft 5 may be reduced, as shown in Figure 3(C).

[0036] The width dimension of the hosel 4 when viewed from the front can also be set independently of the diameter of the shaft 5. For example, as shown in Figure 3(D), the width dimension of the hosel 4 may be set to a dimension approximately the same as the diameter of the shaft 5. Alternatively, the hosel 4 may be formed in a shape where the width dimension is smaller only at the upper end connected to the shaft 5. In this case, as shown in Figure 3(E), the width dimension of the upper end of the hosel 4 may be set to a dimension approximately the same as the diameter of the shaft 5. Or, as shown in Figure 3(F), the upper end of the hosel 4 may be thinner than the shaft 5.

[0037] The orientation of the hosel 4, which is fixed to the head 3, is set to extend in a plane parallel to the striking surface 2. For example, as shown in Figure 4(A), the hosel 4 may be positioned parallel to the striking surface 2. Alternatively, as shown in Figure 4(B), the flat hosel 4 may be tilted at an angle (for example, with the upper part tilted toward the striking surface 2). Furthermore, the shape of the lower end of the shaft 5 fixed to the hosel 4 may be crank-shaped, straight, or bent, as shown in Figure 4(A).

[0038] The shape of the hosel 4 may be formed as a flat plate or as a curved plate. If it is formed as a flat plate, it may be formed as a rectangular flat plate as shown in Figure 4(A), or as a polygonal flat plate (triangular or pentagonal). If it is formed as a curved plate, as shown in Figure 4(C), it may be curved so that the side closer to the striking surface 2 is on the inside in a vertical cross section perpendicular to the striking surface 2, or it may be curved so that the side closer to the striking surface 2 is on the outside. A side view of the golf club 1 shown in Figure 4(C) is illustrated in Figure 5(A).

[0039] Furthermore, the shape of the hosel 4 may be formed as an irregular quadrilateral flat plate. Figures 4(D) and 5(B) show a hosel 4 formed as an irregular quadrilateral flat plate that mimics the side shape of a horseshoe. The irregular quadrilateral of the hosel 4 shown in Figure 5(B) has a lower side 51 that is in contact with the upper surface of the head 3, a first side 52 and a second side 53, and an upper side 54 that is not parallel to the lower side 51. The first side 52 is formed to make an angle A with respect to the lower side 51 of 40 degrees or more and less than 50 degrees. The second side 53 is formed to make an angle B with respect to the lower side 51 of 120 degrees or more and less than 130 degrees.

[0040] As shown in Figure 5(C), the shaft 5 may also incorporate telescopic mechanisms 55 and 56. One telescopic mechanism 55 is a mechanism that can extend and retract in the extension direction of the shaft 5 (up and down direction in the figure) and is a mechanism for adjusting the vertical position of the head 3 relative to the grip 6. Similarly, the other telescopic mechanism 56 is a mechanism that can extend and retract in a direction perpendicular to the telescopic mechanism 55 (left and right direction in the figure) and is a mechanism for adjusting the left and right position of the head 3. In addition, the hosel 4 may also incorporate a telescopic mechanism 57. The telescopic mechanism 57 is a mechanism that can extend and retract in the up and down direction in the figure and is a mechanism for adjusting the vertical position of the head 3.

[0041] Furthermore, a sliding mechanism 58 may be incorporated at the connection point between the hosel 4 and the head 3. The sliding mechanism 58 is a mechanism for adjusting the horizontal position of the hosel 4 relative to the head 3 (or the horizontal position of the head 3 relative to the hosel 4). The sliding direction of the sliding mechanism 58 may be left-right in the figure, or perpendicular to the plane of the paper. Of course, as mentioned above, the positions of the hosel 4 and head 3 can also be adjusted so that they are flush with the striking surface 2, as shown in Figure 5(D). Alternatively, the positions of the hosel 4 and head 3 can also be adjusted so that they are flush with the surface 2' opposite to the striking surface 2 (this surface 2' can also be the striking surface 2), as shown in Figure 5(E). Furthermore, in the following embodiments as well, the surface opposite to the striking surface 2 can also be used as the striking surface.

[0042] As described above, by extending a planar hosel 4 of a certain thickness parallel to the striking surface 2, the vibration of the striking surface 2 is converted into surface vibration (membrane vibration) of the hosel 4. This allows the vibration to be efficiently transmitted to the shaft 5 and grip 6, enabling the user to feel accurate and subtle vibrations. Therefore, a good feel can be provided to the user, improving the feel compared to existing golf clubs.

[0043] The head 3, hosel 4, shaft 5, and grip 6 may be formed as a single unit. However, the grip 6 may be formed separately from the other components 3 to 5. Figures 6(A) and (B) are cross-sectional views of a golf club 1 in which the head 3, hosel 4, and shaft 5 are formed as a single unit. Such a golf club 1 may be formed, for example, by casting, or by seamlessly joining separately formed individual parts by welding or brazing. That is, the hosel 4 may be formed integrally with the head 3 and shaft 5 in a way that makes it irreplaceable.

[0044] The interiors of the head 3, hosel 4, shaft 5, and grip 6 may be hollow (having a cavity inside) or solid (not having a cavity inside). Figures 7(A) and 7(B) are cross-sectional views of a golf club 1 in which hollows are formed inside the head 3, hosel 4, and shaft 5. Here, the hosel 4 has a hollow hosel cavity 8 (first cavity) inside. Similarly, the shaft 5 has a hollow shaft cavity 9 (second cavity) inside, and the head 3 has a hollow head cavity 7 (fourth cavity) inside. The head cavity 7 and the shaft cavity 9 are in communication with the hosel cavity 8.

[0045] Figures 8(A) and 8(B) are cross-sectional views of a golf club 1 in which the hosel 4 is hollow and the head 3 and shaft 5 are solid. Figures 9(A) and 9(B) are also cross-sectional views of a golf club 1 in which the hosel 4 and shaft 5 are hollow and the head 3 is solid. The cavity can be formed in any of the head 3, hosel 4, shaft 5, or grip 6.

[0046] By creating cavities inside the head 3, hosel 4, shaft 5, grip 6, etc., the vibrations of the striking surface 2 are converted into vibrations of the air inside the cavities. This allows the vibrations of the striking surface 2 to be transmitted to the user not only as physical vibrations but also as sound. In other words, the user can perceive the vibrations of the striking surface as sound, improving the feel of the shot. Furthermore, as shown by the dashed lines in Figures 7(B), 8(B), and 9(B), an opening 11 may be formed that connects the internal space of the hosel cavity 8 to the outside of the hosel 4, or a head opening 12 may be formed that connects the internal space of the head 3 to the outside. This can amplify the sound that reaches the user's ears, further improving the feel of the shot. The positions of the opening 11 and the head opening 12 may be on the side where the striking surface 2 is formed (front), on the opposite side (back), or on the side. Note that there may be only one of the openings 11 or 12, or the openings 11 and 12 may not exist (they may not be formed).

[0047] [2. Vibration transmission members] A vibration transmission member 20 may be built into the inside of the golf club 1. Figure 10 is a cross-sectional view illustrating the internal structure of a golf club 1 with a vibration transmission member 20 built in. Inside this golf club 1, in addition to the hosel cavity 8 and the shaft cavity 9, there is also a grip cavity 10. The grip cavity 10 is a hollow (third hollow) formed inside the grip 6 and is in communication with the shaft cavity 9. The upper end of the grip 6 is closed by a grip upper end plate 21.

[0048] The vibration transmission member 20 is a member that transmits vibrations generated on the striking surface 2 to the grip 6. The vibration transmission member 20 is formed in a long shape and is installed inside the hosel cavity 8, the shaft cavity 9, and the grip cavity 10. Specific examples of the vibration transmission member 20 include wires (e.g., steel wires or piano wires), strings (e.g., strings made by weaving various fibers), rod members (e.g., rod members formed from rod-shaped metal or wood), linear elastic members (e.g., linear elastic members made from rubber or resin), and long coil springs.

[0049] One end of the vibration transmission member 20 (the lower end in Figure 10) is fixed to the head 3 via a fixing device 22. The other end of the vibration transmission member 20 (the upper end in Figure 10) is attached to the inner surface of the grip 6 via an internal grip plate 23 and an internal grip fixing device 24 (mounting member). As shown in Figure 10, a mass member 26 that acts as a weight to amplify vibrations may be attached to the vibration transmission member 20. The position of the mass member 26 may be fixed relative to the vibration transmission member 20, or it may be movable (its fixed position may be adjustable). In addition, for example, the mass member 26 may be made available according to the user's preference.

[0050] Vibrations generated on the striking surface of the head 3 are transmitted not only to the grip 6 via the hosel 4 and shaft 5, but also to the grip 6 via the vibration transmission member 20. By incorporating the vibration transmission member 20 into the shaft 5 in this way, the vibration transmission paths can be increased, allowing vibrations generated on the striking surface of the head 3 to be efficiently transmitted to the grip 6 without attenuation. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0051] The grip internal plate 23 and grip internal fixing device 24 (mounting member) provided at the other end of the vibration transmission member 20 (upper end in Figure 10) may be provided so as to be able to adjust the position in the extending direction of the grip 6 by an electrically or manually operated adjustment mechanism (not shown). This allows the tension of the vibration transmission member 20 to be adjusted, and vibrations can be efficiently transmitted to the grip 6. In addition, the grip internal plate 23 may be formed in a membrane shape that unfolds in a direction intersecting the extending direction of the grip 6 (for example, a direction perpendicular to the extending direction of the grip 6). By making the grip internal plate 23 in a membrane shape, the grip internal plate 23 can be made to vibrate as a surface (membrane vibration), and the vibration transmission efficiency can be improved.

[0052] Figure 11 is a cross-sectional view illustrating the internal structure of a golf club 1 with a vibration transmission member 20 and an auxiliary vibration transmission member 30 built in. A head cavity 7 is provided inside the head 3 of the golf club 1, and the auxiliary vibration transmission member 30 is installed inside it. The auxiliary vibration transmission member 30 is a member that transmits vibrations generated on the striking surface 2 to the vibration transmission member 20. Specific examples of the auxiliary vibration transmission member 30 include wires, strings, rod members, linear elastic members, long coil springs, etc., similar to the vibration transmission member 20.

[0053] The end of the head tip portion 31 (left side in Figure 11) of the auxiliary vibration transmission member 30 is attached to the inner circumferential surface of the head 3 via a head tip side fixing device 33. The end of the head base portion 32 (right side in Figure 11) is attached to the inner circumferential surface of the head 3 via a head base side fixing device 34. The middle portion of the auxiliary vibration transmission member 30 is attached to the inner circumferential surface of the head 3 via an internal head plate 35 and an internal head fixing device 36. The auxiliary vibration transmission member 30 and the internal head fixing device 36 are fastened together with a binding portion 37. A hole is drilled in the internal head plate 35 into which the auxiliary vibration transmission member 30 is loosely inserted. The position of the internal head plate 35 is set, for example, near the striking surface 2.

[0054] One end of the vibration transmission member 20 (the lower end in Figure 11) is fixed to the auxiliary vibration transmission member 30 via a connecting fitting 27. The other end of the vibration transmission member 20 (the upper end in Figure 11) may have the structure shown in Figure 10, or it may be fixed to the upper end plate 21 of the grip via an upper end fixing device 28. In the example shown in Figure 11, the middle portion of the vibration transmission member 20 is attached to the inner surface of the grip 6 via an internal grip plate 23 and an internal grip fixing device 24. The vibration transmission member 20 and the internal grip fixing device 24 are fastened together with a binding portion 25. The internal grip plate 23 has a hole into which the vibration transmission member 20 is loosely inserted. Two pairs of internal grip plates 23 and internal grip fixing devices 24 are provided.

[0055] Vibrations generated on the striking surface of the head 3 are transmitted not only to the grip 6 via the hosel 4 and shaft 5, but also to the grip 6 via the auxiliary vibration transmission member 30 and vibration transmission member 20. By incorporating the auxiliary vibration transmission member 30 into the head 3 in this way, the vibrations transmitted to the vibration transmission member 20 can be amplified, and these vibrations can be efficiently transmitted to the grip 6. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0056] Figure 12 is a cross-sectional view illustrating the internal structure of a golf club 1, which is provided with three pairs of vibration transmission members 20 and auxiliary vibration transmission members 30. By providing multiple vibration transmission members 20 and auxiliary vibration transmission members 30 in this way, vibrations generated on the striking surface of the head 3 can be efficiently transmitted to the grip 6. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0057] Figure 13 is a cross-sectional view showing an example of a structure for adjusting the position of the other end (upper end in Figure 13) of the vibration transmission member 20 in the extending direction of the grip 6. Here, the vibration transmission member 20 is composed of one of the following: a wire, a string, a linear elastic member, or a long coil spring. A motor 43 and a winding device 44 are provided at the other end of the vibration transmission member 20. A pinion 42 is rotatably attached to the motor 43.

[0058] Furthermore, a rack 41 that meshes with the pinion 42 is fixed to the inner circumferential surface of the grip cavity 10. The pinion 42 is biased upward relative to the rack 41 by a biasing member (e.g., a spring or rubber) not shown. By rotating the motor 43 and winding the other end of the vibration transmission member 20 with the winding device 44, the pinion 42 is moved downward along the rack 41. Conversely, by unwinding the motor 43, the pinion 42 is moved upward along the rack 41. With this configuration, the position to which vibration is transmitted can be easily adjusted in the extending direction of the grip 6, and vibration can be efficiently transmitted to the grip 6.

[0059] Alternatively, a manually operated winding device 44 may be used instead of the motor 43. The winding device 44 may be provided so that it can be rotated from the outside using a jig such as a Phillips screwdriver or a flathead screwdriver. In this case, by manually rotating the winding device 44 to wind up the other end of the vibration transmission member 20, the pinion 42 is moved downward along the rack 41. Conversely, by unwinding the winding device 44 in the reverse direction, the pinion 42 is moved upward along the rack 41. With this configuration, the position to which vibration is transmitted can be easily adjusted manually in the direction of extension of the grip 6, and vibration can be efficiently transmitted to the grip 6.

[0060] [3. Head] Figures 14(A) and (B) are perspective views illustrating modified versions of the head 3. As shown in these figures, the head 3 may incorporate a weight member 61 for changing the center of gravity of the head 3. In this case, the center of gravity can be changed by making the mounting state (position and angle) of the weight member 61 adjustable. The mounting state of the weight member 61 may be manually adjustable by the user, or a weight motor 62 (drive source) may be provided to move the weight member 61.

[0061] Figure 14(A) is a perspective view showing the head 3 with two sets of weight members 61 and a weight motor 62 built into its upper surface. The weight members 61 are made of a material with a different density than the material that makes up the head 3, and are installed inside hollow cylindrical recesses formed in the upper surface of the head 3. The weight motor 62 changes the position of each weight member 61 by rotating them along the inner circumferential surface of the recesses. With this configuration, the position of the weight members 61 can be easily changed to shift the center of gravity of the head 3, providing a good feel when hitting the ball.

[0062] Figure 14(B) is a perspective view showing a head 3 with weight members 61 provided inside a linear recess formed in the upper surface of the head 3. The weight motor 62 changes the position of each weight member 61 by sliding it along the inner circumferential surface of the recess. Even with this configuration, the position of the weight members 61 can be easily changed to shift the center of gravity of the head 3, providing a good feel when hitting the ball.

[0063] [4. Effects] (1) The golf club 1 in this case comprises a head 3, a shaft 5, a hosel 4, and a grip 6. The head 3 has a striking surface 2 for striking a golf ball. The shaft 5 is formed in an axial shape. The hosel 4 integrally connects one end of the shaft 5 to the head 3 in a non-replaceable manner. The grip 6 is provided at the other end of the shaft 5 and is held by the user. By forming the hosel 4 integrally with the head 3 and shaft 5 in a non-replaceable manner, the damping of vibrations passing through the hosel 4 can be suppressed, and vibrations can be efficiently transmitted to the grip 6. Therefore, the feel of the shot can be further improved.

[0064] (2) The hosel 4 is formed in a plate shape with a constant thickness, stretched in a planar direction parallel to the striking surface 2. By stretching the planar hosel 4 with a constant thickness parallel to the striking surface 2 in this way, the vibration of the striking surface 2 is converted into surface vibration (membrane vibration) of the hosel 4. As a result, the vibration is efficiently transmitted to the shaft 5 and grip 6, allowing the user to feel accurate and delicate vibrations. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0065] (3) The hosel 4 in this case can be formed in the shape of a rectangular flat plate, for example, as shown in Figures 2(A)-(C), 3(A)-(F), and 4(A)-(B). By forming the hosel 4 in the shape of a rectangular flat plate in this way, the vibration transmission efficiency can be improved with a simple configuration. Therefore, the feel of the club can be further improved.

[0066] (4) The hosel 4 in this case can be formed in the shape of a curved plate, such that in a vertical cross section perpendicular to the striking surface 2, the side closer to the striking surface 2 is on the inside. This shape improves vibration transmission efficiency while bringing the connection position between the shaft 5 and the hosel 4 closer to the striking surface in a top view. Therefore, a good feel can be provided. It is also possible to position the golf ball at the point of contact with the striking surface 2 on the extension of the shaft 5.

[0067] Furthermore, the hosel 4 in this case can also be formed in the shape of an irregular quadrilateral flat plate that mimics the side shape of a horseshoe, as shown in Figures 4(D) and 5(B). This irregular quadrilateral has a lower side 51 that is in contact with the top surface of the head 3, a first side 52 that forms an angle of 40 degrees or more and less than 50 degrees with respect to the lower side 51, a second side 53 that forms an angle of 120 degrees or more and less than 130 degrees with respect to the lower side 51, and an upper side 54 that connects the first side 52 and the second side 53 and is not parallel to the lower side 51. By adopting an irregular quadrilateral flat shape that mimics the side shape of a horseshoe as the shape of the hosel 4, it is possible to provide a good feel while ensuring the strength and rigidity of the hosel 4.

[0068] (5) The hosel 4 in this case may have a hollow hosel cavity 8 (first cavity) inside, as shown in Figures 7 to 9, for example. By forming such a hosel cavity 8 inside the hosel 4, sound can be generated in the hosel cavity 8. This allows the user to perceive the vibration of the striking surface 2 as sound, further improving the feel of the strike. Furthermore, by forming an opening 11 to transmit the resonant sound of the hosel cavity 8 to the outside of the hosel 4, the sound audible to the user can be amplified, further improving the feel of the strike and allowing the user to fully perceive the sound of the strike.

[0069] (6) The shaft 5 in this invention may have, for example, a hollow shaft cavity 9 (second cavity) that communicates with the hosel cavity 8 (first cavity) inside, as shown in Figures 7 and 9. By forming such a shaft cavity 9 inside the shaft 5, vibrations can be reflected in the shaft cavity 9 as well, and the sound audible to the user can be amplified. Therefore, the feel and sound of impact can be further improved.

[0070] (7) The grip 6 in this invention may have, for example, a hollow grip cavity 10 (third cavity) that communicates with the shaft cavity 9 (second cavity) inside, as shown in Figures 10 to 13. By forming such a grip cavity 10 inside the grip 6, vibrations can be reflected in the grip cavity 10 as well, and the sound audible to the user can be amplified. Therefore, the feel and sound of impact can be further improved.

[0071] (8) The grip 6 in this case may be formed integrally with the shaft 5, for example, as shown in Figures 10 to 13. If the shaft 5 and the grip 6 are separate components, vibrations may be attenuated as they pass through the joint between them, potentially reducing the vibrations transmitted to the grip 6. To address this issue, forming the shaft 5 and the grip 6 integrally allows for more efficient transmission of vibrations to the grip 6. Therefore, the feel of the ball can be further improved.

[0072] (9) The golf club 1 in this case may be fitted with a vibration transmission member 20 that transmits vibrations generated on the striking surface 2 to the grip 6, for example, as shown in Figure 10. The vibration transmission member 20 is formed in an elongated shape, with one end fixed to the head 3 and built into the shaft cavity 9 (second cavity) and the grip cavity 10 (third cavity). In addition, a grip internal plate 23 and a grip internal fixing device 24 (mounting member) that connect the other end of the vibration transmission member 20 to the grip 6 may be fitted inside the grip cavity 10 (third cavity). By building the vibration transmission member 20 into the shaft 5 and the grip 6 in this way, vibrations generated on the striking surface 2 of the head 3 can be efficiently transmitted to the grip 6 without attenuation, further improving the feel of the shot.

[0073] (10) For example, as shown in Figure 13, the mounting member (pinion 42, motor 43, winding device 44 or manually operated winding device 44 in Figure 13) that connects the other end of the vibration transmission member 20 to the grip 6 may be provided so that its position can be adjusted in the extending direction of the grip 6. With such a configuration, the position to which the vibration of the vibration transmission member 20 is transmitted can be adjusted, and the vibration can be efficiently transmitted to the grip 6. Therefore, the feel of hitting the ball can be further improved. Furthermore, the internal plate 23 and internal fixing device 24 (mounting member) shown in Figure 10 may be provided so as to be able to adjust the position of the grip 6 in the extending direction by an adjustment mechanism (not shown). This allows the tension of the vibration transmission member 20 to be adjusted, and vibrations can be efficiently transmitted to the grip 6.

[0074] (11) The vibration transmission member 20 in this invention may be composed of a wire, a string, a rod member, or a linear elastic member. This allows the vibration transmission member 20 to be realized with a simple configuration, and the vibration transmission efficiency can be easily improved. Therefore, the feel of hitting the ball can be further improved.

[0075] (12) Furthermore, the internal grip plate 23 (mounting member) in this case may be formed in a film-like shape that unfolds in a direction intersecting the extending direction of the grip 6. By making the internal grip plate 23 (mounting member) in a film-like shape, surface vibration (film vibration) can be made possible, and the vibration transmission efficiency can be improved. Therefore, the feel of the ball can be further improved.

[0076] (13) As shown in Figures 10 and 11, a mass member 26 that acts as a weight to amplify vibrations may be attached to the vibration transmission member 20. By providing the mass member 26, the vibration of the vibration transmission member 20 can be easily amplified, or the damping of vibrations can be suppressed, thereby improving the vibration transmission efficiency. Therefore, the feel of hitting the ball can be further improved.

[0077] (14) The head 3 in this invention may have a hollow head cavity 7 (fourth cavity) inside that communicates with the hosel cavity 8 (first cavity). By forming such a head cavity 7 inside the head 3, vibrations can be reflected in the head cavity 7 as well, and the sound audible to the user can be amplified. Therefore, the feel of hitting the ball can be further improved.

[0078] (15) The golf club 1 in this case may be fitted with an auxiliary vibration transmission member 30 that transmits vibrations generated on the striking surface 2 to the vibration transmission member 20, for example, as shown in Figures 11 and 12. The auxiliary vibration transmission member 30 is provided inside the head cavity 7 (fourth cavity). By incorporating the auxiliary vibration transmission member 30 into the head 3 in this way, vibrations generated on the striking surface 2 of the head 3 can be efficiently transmitted to the vibration transmission member 20 without attenuation, further improving the feel of the shot.

[0079] (16) As shown in Figures 14(A) and (B), a weight member 61 can be applied to the head 3 in this invention to change the center of gravity of the head 3. By changing the mounting position and mounting angle of such a weight member 61, the center of gravity of the head 3 can be easily moved, providing a good feel when hitting the ball.

[0080] (17) As shown in Figure 14(A), a weight motor 62 may be provided as a drive source for moving the weight member 61. In this case, the weight member 61 is provided, for example, inside a hollow cylindrical recess formed in the upper surface of the head 3. The weight motor 62 rotates the weight member 61 along the inner circumferential surface of the recess. With this configuration, the center of gravity of the head 3 can be easily adjusted using the weight motor 62. Therefore, the feel of the shot can be further improved.

[0081] [5. Variant] The embodiments of the first embodiment described above are merely illustrative examples, and there is no intention to exclude various modifications or applications of techniques not explicitly shown in these embodiments. Each configuration of the embodiments of the first embodiment can be modified in various ways without departing from their spirit. Furthermore, they can be selected or combined as needed.

[0082] For example, as shown in Figure 15, a vibration sensor 81 for detecting vibrations generated at the striking surface 2 may be built into the hosel 4. The vibration sensor 81 may be attached to the outer surface of the hosel 4 or built into it. If a hosel cavity 8 is formed inside the hosel 4, the vibration sensor 81 may be placed inside it. By detecting vibrations with the vibration sensor 81, the magnitude and waveform of vibrations near the vibration source (striking surface 2) can be objectively captured, further improving the feel of the shot. In addition, the magnitude and waveform of vibrations can be analyzed, and the effectiveness of golf practice can be enhanced by utilizing the analysis results. The information detected by the vibration sensor 81 may be transmitted to a computer (not shown) by, for example, wireless or wired connection.

[0083] Alternatively, a vibration device 82 that vibrates based on vibration information detected by the vibration sensor 81 may be built into the grip 6. If a grip cavity 10 is formed inside the grip 6, the vibration device 82 may be placed inside it. The vibration device 82 may function, for example, to amplify and output the vibration detected by the vibration sensor 81. By amplifying the vibration with the vibration device 82, the vibration actually transmitted to the user can be increased, further improving the feel of hitting the ball.

[0084] Furthermore, a speaker 82A that emits sound based on vibration information detected by the vibration sensor 81 may be built into the grip 6. If a grip cavity 10 is formed inside the grip 6, the speaker 82A including an amplifier may be placed inside it. The speaker 82A may function, for example, to amplify and output the vibration detected by the vibration sensor 81 as sound. As a result, when a golf ball is struck with one of the hitting surfaces of the golf club, the vibration at that time is detected by the vibration sensor 81 and can be heard as sound from the speaker 82A. At this time, the hollow shaft 5 acts as a speaker box, amplifying and outputting the sound related to the vibration. As a result, the golf club 1 can function as a kind of electronic musical instrument. Of course, both the vibration device 82 and the speaker 82A may be attached to the grip 6.

[0085] Furthermore, as shown in Figures 16(A) and (B), thin plate-shaped fins 13 may be erected on the upper surface of the head 3. The fins 13 are thin plate-shaped or hollow plate-shaped parts that function to amplify vibrations generated in the head 3 and hosel 4. The number of fins 13 can be set appropriately according to the size of the head 3 and hosel 4, and there may be one or two or more. Also, the fins 13 may be positioned on the side closer to the striking surface 2, or on the side further away from the striking surface 2, with reference to the position of the hosel 4 to which the shaft 5 is connected.

[0086] As shown in Figures 16(A) and (B), the height of the fin 13 may be set to the same (or approximately the same) height as the hosel 4. Alternatively, as shown in Figures 16(C), (D), and (E), the height of the fin 13 may be different from that of the hosel 4, or it may be set to, for example, about half the height of the hosel 4. In this way, the relative sizes (thickness, height, and depth) of the hosel 4 and the fin 13 can be set as appropriate. Furthermore, the fin 13 positioned near the hosel 4 may be formed integrally with the hosel 4 or as a separate part.

[0087] Furthermore, a lighting element 13B, for example, containing an LED or fluorescent material, can be placed on the top surface 13A of the fin 13. Alternatively, a lighting element 4B similar to the lighting element 13B may be placed on the top surface 4A of the hosel 4. The lighting elements 4B and 13B may be one or more, and may be arranged in a planar manner, in rows, or in a chain. In this way, the trajectory of the head 3 can be clearly seen even when practicing in the dark. Note that the lighting element 4B can be omitted.

[0088] Furthermore, the fin 13 can be shaped as follows: as shown in Figures 17(A), (B), and (C), it can be curved (crescent-shaped) when viewed from above; or as shown in Figures 17(D), (E), and (F), it can be shaped as a wave when viewed from above. Of course, the fin 13 can also be shaped in combination with curved or wave-shaped fins, and other shapes can also be used when viewed from above. When using fins 13 of such shapes, the hosel 4 can also be shaped as curved or wave-shaped at the same time. By making the hosel 4 curved or wave-shaped when viewed from above, a wavering effect is created, which can give the user a sense of balance.

[0089] Furthermore, as shown in Figures 17(G) and (H), the longitudinal direction of the head 3 may be formed to coincide with the swing direction of the head 3 in a top view (see solid or dashed arrow), or U-shaped fins 13 may be provided on the upper surface of the head 3. The number of fins 13 may be one or multiple. The orientation of the fins 13 is preferably set so that the U shape opens towards the striking surface 2 in a top view. Note that the positions of the hosel 4 and the head 3 can also be flush with the striking surface 2, as shown in Figures 17(C), (F), and (H).

[0090] Figures 18(A) and (B) are cross-sectional views illustrating the internal structure of the golf club 1 shown in Figure 16(A). By providing fins 13 on the upper surface of the head 3, vibrations can be easily amplified. Furthermore, if multiple fins 13 are provided (these fins 13 can be straight, curved, or wave-shaped when viewed from above), vibrations can resonate between them and be further amplified. Therefore, a good feel and sound can be provided to the user, and a structure that produces the same effects as the embodiment described above can be provided.

[0091] [II. Description of the Second Embodiment] The second embodiment differs from the first embodiment in that it does not have a hosel 4. In the second embodiment, the golf club 1 has a hollow shaft 5 and grip 6, and a vibration transmission member 20 is provided in these hollow portions.

[0092] In other words, a vibration transmission member 20 is built into the inside of the golf club 1, which does not have a hosel 4. Figure 19 is a cross-sectional view illustrating the internal structure of the golf club 1 in which the vibration transmission member 20 is built. Inside this golf club 1, there is not only a shaft cavity 9 (second hollow section) but also a grip cavity 10 (third hollow section). The grip cavity 10 is a hollow formed inside the grip 6 and is in communication with the shaft cavity 9. The upper end of the grip 6 is closed by a grip upper end plate 21.

[0093] The vibration transmission member 20 is a member that transmits vibrations generated on the striking surface 2 to the grip 6. The vibration transmission member 20 is formed in an elongated shape and is installed inside the shaft cavity 9 and the grip cavity 10. Specific examples of the vibration transmission member 20 include wires (e.g., steel wires or piano wires), strings (e.g., strings made by weaving various fibers), rod members (e.g., rod members formed from rod-shaped metal or wood), linear elastic members (e.g., linear elastic members made from rubber or resin), and elongated coil springs.

[0094] One end of the vibration transmission member 20 (the lower end in Figure 19) is fixed to the head 3 via a fixing device 22. The other end of the vibration transmission member 20 (the upper end in Figure 19) is attached to the inner surface of the grip 6 via an internal grip plate 23 and an internal grip fixing device 24 (mounting member). As shown in Figure 19, a mass member 26, which acts as a weight to amplify vibrations, may be attached to the vibration transmission member 20. The position of the mass member 26 may be fixed relative to the vibration transmission member 20, or it may be movable (its fixed position can be adjusted). In addition, the mass member 26 may be added, changed, or replaced according to the user's preference, for example.

[0095] Vibrations generated on the striking surface of the head 3 are transmitted not only to the grip 6 via the shaft 5, but also to the grip 6 via the vibration transmission member 20. By incorporating the vibration transmission member 20 into the shaft 5 in this way, the vibration transmission paths can be increased, allowing vibrations generated on the striking surface of the head 3 to be efficiently transmitted to the grip 6 without attenuation. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0096] The grip internal plate 23 and grip internal fixing device 24 (mounting member) provided at the other end of the vibration transmission member 20 (upper end in Figure 19) may be provided so as to be able to adjust the position in the extending direction of the grip 6 by an electric or manual adjustment mechanism (not shown). This allows the tension of the vibration transmission member 20 to be adjusted, and vibrations can be efficiently transmitted to the grip 6. In addition, the grip internal plate 23 may be formed in a membrane shape that unfolds in a direction intersecting the extending direction of the grip 6 (for example, a direction perpendicular to the extending direction of the grip 6). By making the grip internal plate 23 in a membrane shape, the grip internal plate 23 can be made to vibrate as a surface (membrane vibration), and the vibration transmission efficiency can be improved.

[0097] Figure 20 is a cross-sectional view illustrating the internal structure of a golf club 1 with a vibration transmission member 20 and an auxiliary vibration transmission member 30 built in. Inside the head 3 of this golf club 1, there is a head cavity 7 (fourth cavity), and the auxiliary vibration transmission member 30 is installed inside it. The auxiliary vibration transmission member 30 is a member that transmits vibrations generated on the striking surface 2 to the vibration transmission member 20. Specific examples of the auxiliary vibration transmission member 30 include wires, strings, rod members, linear elastic members, long coil springs, etc., similar to the vibration transmission member 20.

[0098] The head tip portion 31 (left side in Figure 20) of the auxiliary vibration transmission member 30 is attached to the inner circumferential surface of the head 3 via a head tip side fixing device 33. The head base portion 32 (right side in Figure 20) is attached to the inner circumferential surface of the head 3 via a head base side fixing device 34. The middle portion of the auxiliary vibration transmission member 30 is attached to the inner circumferential surface of the head 3 via an internal head plate 35 and an internal head fixing device 36. The auxiliary vibration transmission member 30 and the internal head fixing device 36 are fastened together with a binding portion 37. A hole is drilled in the internal head plate 35 into which the auxiliary vibration transmission member 30 is loosely inserted. The position of the internal head plate 35 is set, for example, near the striking surface 2.

[0099] One end of the vibration transmission member 20 (the lower end in Figure 20) is fixed to the auxiliary vibration transmission member 30 via a connecting fitting 27. The other end of the vibration transmission member 20 (the upper end in Figure 20) may have a structure as shown in Figure 19 or as shown in Figure 20, or it may be fixed to the grip upper end plate 21 via a grip upper end fixing device 28. In the example shown in Figure 20, the middle portion of the vibration transmission member 20 is attached to the inner circumferential surface of the grip 6 via a grip inner plate 23 and a grip inner fixing device 24. The vibration transmission member 20 and the grip inner fixing device 24 are also fastened together with a binding portion 25. The grip inner plate 23 has a hole in which the vibration transmission member 20 is loosely inserted. Two pairs of grip inner plates 23 and grip inner fixing devices 24 are provided.

[0100] Vibrations generated on the striking surface of the head 3 are transmitted not only to the grip 6 via the shaft 5, but also to the grip 6 via the auxiliary vibration transmission member 30 and the vibration transmission member 20. By incorporating the auxiliary vibration transmission member 30 into the head 3 in this way, the vibrations transmitted to the vibration transmission member 20 can be amplified, and these vibrations can be efficiently transmitted to the grip 6. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0101] Figure 21 is a cross-sectional view illustrating the internal structure of a golf club 1, which is provided with three pairs of vibration transmission members 20 and auxiliary vibration transmission members 30. By providing multiple vibration transmission members 20 and auxiliary vibration transmission members 30 in this way, vibrations generated on the striking surface of the head 3 can be efficiently transmitted to the grip 6. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0102] Figure 22 is a cross-sectional view showing an example of a structure for adjusting the position of the other end (upper end in Figure 22) of the vibration transmission member 20 in the extending direction of the grip 6. Here, the vibration transmission member 20 is composed of a wire, string, or linear elastic member. A motor 43 and a winding device 44 are provided at the other end of the vibration transmission member 20. A pinion 42 is rotatably attached to the motor 43.

[0103] Furthermore, a rack 41 that meshes with the pinion 42 is fixed to the inner circumferential surface of the grip cavity 10. The pinion 42 is biased upward relative to the rack 41 by a biasing member (e.g., a spring or rubber) not shown. By rotating the motor 43 and winding the other end of the vibration transmission member 20 with the winding device 44, the pinion 42 moves downward along the rack 41. Conversely, by unwinding the motor 43, the pinion 42 moves upward along the rack 41.

[0104] Alternatively, a manually operated winding device 44 may be used instead of the motor 43. The winding device 44 may be provided so that it can be rotated from the outside using a jig such as a Phillips screwdriver or a flathead screwdriver. In this case, by manually rotating the winding device 44 to wind up the other end of the vibration transmission member 20, the pinion 42 is moved downward along the rack 41. Conversely, by unwinding the winding device 44 in the reverse direction, the pinion 42 is moved upward along the rack 41. With this configuration, the position to which vibration is transmitted can be easily adjusted manually in the direction of extension of the grip 6, and vibration can be efficiently transmitted to the grip 6.

[0105] [III. Description of the Third Embodiment] The third embodiment relates to a golf club 1 characterized by an insert provided on the striking surface 2 of the head 3. As shown in Figure 23, this golf club 1 comprises a head 3, a shaft 5, and a grip 6.

[0106] The side of the head 3 is provided with a striking surface (face) 2 for striking the golf ball. The striking surface 2 is equipped with an insert consisting of a surface vibrating member 15 that is formed in a planar shape and vibrates upon impact with the golf ball, while also providing a reactive force to the golf ball. This allows for efficient application of reactive force to the ball with minimal effort, increasing distance. Surface vibration also improves the feel of the shot.

[0107] The surface vibration member 15 has, for example, a net member 16 formed by weaving a string 19 into a net shape inside the frame 18, as shown in Figure 24, and a membrane member 17 that covers the entire surface of the net member 16 and is attached to the striking surface 2. The net member 16 has a structure similar to that of a tennis racket, for example. This allows for efficient application of reaction force to the ball. Preferably, the net member 16 and the membrane member 17 can be individually attached to and detached from the striking surface 2 of the head 3.

[0108] The strings 19 constituting the net component 16 include at least one of the following: natural fibers (gut (cow, sheep intestines)), synthetic fibers (nylon fibers, polyester fibers), and elastic fibers (natural rubber fibers, synthetic rubber fibers). The membrane component 17 includes at least one of the following: metal plates, resin plates, rubber membranes, and leather membranes. This allows for the inexpensive realization of the net component by reusing existing strings (such as tennis strings or rubber belts), and also allows for the inexpensive realization of the membrane component by reusing existing membrane products (such as drumheads or the rubber membranes of table tennis rackets). Furthermore, the net component 16 and the membrane component 17 can be formed integrally to create a structure similar to the hitting surface structure of a table tennis racket, or drumheads can be stretched over a frame material as the net component 16. It is also possible to use metal inserts. In this case, the inserts may be formed in a grid pattern, similar to the lid of a grating.

[0109] Furthermore, the structure of the insert may be made to resemble that of a gong. That is, the striking surface 2 of the insert can be made to have a hanging structure, so that when a golf ball hits this gong-like striking surface 2, it will produce a sound similar to that of a gong. If a drumhead is stretched over the frame as the net component 16, or if the insert striking surface 2 is made of a gong structure, a vibration sensor that detects the vibration of the drumhead or the gong-structured insert can be installed, for example, inside the head of the golf club or integrated with or close to the insert. The vibration of the drumhead or the gong-structured insert can be amplified and output as sound through a speaker.

[0110] The surface vibration member 15 is detachably attached to the head 3. This allows it to be removed or attached according to the user's preference. The surface vibration member 15 can also be attached to an existing golf club. In addition, a head cavity 7 may be provided, similar to the head cavity 7 in the first embodiment, by forming the inside of the head 3 to be hollow. For example, as shown in Figures 23 and 25, a head cavity 7 may be formed inside the head body 14, and an opening may be provided on its side. The surface vibration member 15 (net member 16, membrane member 17) is attached so as to cover the opening in the head body 14. This allows the surface vibration of the surface vibration member 15 to resonate inside the head cavity 7, improving the feel of the shot.

[0111] Furthermore, an internal wire (auxiliary vibration transmission member) 30 may be installed inside the head cavity 7. The internal wire 30 is stretched inside the head cavity 7 and connected to the surface vibration member 15 via a connecting wire 40. This allows the surface vibration of the surface vibration member 15 to be amplified as vibration of the internal wire 30, thereby improving the feel of the ball.

[0112] Furthermore, as shown in Figure 25, a shaft cavity 9 may be provided, similar to the shaft cavity 9 in the first embodiment, by forming the inside of the shaft 5 to be hollow. With this configuration, surface vibrations can be reflected inside the shaft cavity 9, improving the feel of the ball. As shown in Figure 25, an internal shaft wire 20 may be provided inside the shaft cavity 9. The internal shaft wire 20 is stretched inside the shaft cavity 9 and connected to the internal head wire 30. With this configuration, the surface vibrations of the surface vibration member 15 can be amplified as vibrations of the internal shaft wire 20, improving the feel of the ball.

[0113] Furthermore, as shown in Figure 26, the shaft wire 20 may be stretched to connect the grip 6 and the head wire 30. In other words, the upper end of the shaft wire 20 may be fixed to the inside of the grip 6 to transmit the vibration of the surface vibration member 15 to the grip 6. With this configuration, vibration can be efficiently transmitted to the grip, further improving the feel of the shot.

[0114] When a golf club strikes a ball, if the golf ball hits the impact surface 2 of the insert, and the impact surface 2 hits the sweet spot, a chime, gong, or buzzer may sound as an electronic sound, or an audio notification may be given. The tone of the chime, gong, or buzzer may also differ depending on whether the impact is on the sweet spot or not, or the audio may be changed. In this case, a sensor may be provided to detect whether the golf ball has hit the sweet spot, or a sensor may be provided to detect whether it has missed the sweet spot. Based on the detection information from this sensor (or these sensors), an amplifier may be used to output the sound of a chime, gong, or buzzer, or an audio notification, through a speaker.

[0115] Of course, it is also possible to apply the golf club having the insert head according to this third embodiment to a golf club having a hosel, as in the first embodiment. That is, the insert shown in Figures 23 and 24 can be attached to the head of the hitting surface of a golf club with a hosel. Furthermore, as shown in Figure 25, the inner surface portion of the insert can be directly connected to the auxiliary vibration transmission member (internal head wire 30). In this way, vibrations from the insert are directly transmitted to the internal head wire 30, improving transmission efficiency and contributing to improved feel.

[0116] [IV. Description of the Fourth Embodiment] The fourth embodiment relates to a golf club 1 having a fin or plate member 86. The golf club 1 shown in Figure 27 comprises a head 3 having a striking surface 2 for striking a golf ball, a shaft 5 formed in an axial shape, a hosel 4 connecting one end of the shaft 5 to the head 3, and a grip 6 provided at the other end of the shaft 5 for the user to hold. A fin or plate member 86 is provided between the head 3 and the hosel 4.

[0117] The fin or plate member 86 is a flat plate-shaped member that is fixed to connect the head 3 and the hosel 4 in an orientation approximately parallel to the striking surface 2. The fin or plate member 86 shown in Figure 27 is formed in a triangular flat plate shape and is stretched between the upper surface of the head 3 and the end surface of the hosel 4. Although Figure 27 shows only one fin or plate member 86, the number of fins or plate members 86 is not limited, and multiple fins or plate members 86 may be provided.

[0118] The golf club 1 shown in Figures 28(A) and (B) is a golf club 1 without a hosel 4. That is, these golf clubs 1 comprise a head 3 having a striking surface 2 for striking a golf ball, a shaft 5 formed in an axial shape, and a grip 6 provided at the other end of the shaft 5 for the user to hold. The head 3 is connected to one end of the shaft 5. In addition, one (or more) fins or plate members 86 are provided between the head 3 and the shaft 5. With this configuration, the fins or plate members 86 vibrate on the surface when striking the golf ball, improving the feel of the shot, and also reinforcing the mounting strength of the head 3 to the shaft 5 or hosel 4. Furthermore, as shown in Figures 27, 28(A) and (B), a lighting member 86B containing an LED or fluorescent material may be placed on the top surface 86A of the fins or plate members 86. In this way, the trajectory of the head 3 can be clearly seen even when practicing in the dark.

[0119] [V. Description of the Fifth Embodiment] The fifth embodiment is a golf club 1 equipped with a vibration transmission member 20 and an auxiliary vibration transmission member 30, which incorporates pickups 20A and 30A (first pickup 20A, second pickup 30A) for detecting these vibrations. The first pickup 20A is a sensor that detects the vibration of the vibration transmission member 20 and converts it into an electrical signal, and is located in close proximity to the vibration transmission member 20. Similarly, the second pickup 30A is a sensor that detects the vibration of the auxiliary vibration transmission member 30 and converts it into an electrical signal, and is located in close proximity to the auxiliary vibration transmission member 30. These pickups 20A and 30A generate electrical signals corresponding to the vibrations of the vibration transmission members 20 and 30, for example, as in an electric guitar.

[0120] The golf club 1 shown in Figure 29 comprises a hosel cavity 8, a shaft cavity 9, a grip cavity 10, a vibration transmission member 20, and a first pickup 20A. The vibration transmission member 20 is a member that transmits vibrations generated on the striking surface 2 to the grip 6. The vibration transmission member 20 is formed in an elongated shape and is installed inside the hosel cavity 8, the shaft cavity 9, and the grip cavity 10. A specific example of the vibration transmission member 20 is a wire (for example, a linear member containing a magnetic material such as steel wire or piano wire). The procedure for installing the vibration transmission member 20 is as described in the above embodiment.

[0121] Furthermore, the golf club 1 shown in Figure 30 comprises a hosel cavity 8, a shaft cavity 9, a grip cavity 10, a vibration transmission member 20, an auxiliary vibration transmission member 30, a first pickup 20A, and a second pickup 30A. The auxiliary vibration transmission member 30 is a member that transmits vibrations generated on the striking surface 2 to the vibration transmission member 20, and is provided inside the head cavity 7. As a specific example of the auxiliary vibration transmission member 30, a wire similar to that of the vibration transmission member 20 (for example, a linear member containing a magnetic material such as steel wire or piano wire) is used. The procedure for attaching the vibration transmission members 20 and 30 is as described in the above embodiment.

[0122] The electrical signal detected by the first pickup 20A is amplified by the amplifier 90A built into the golf club 1, as shown in Figure 36, and then transmitted to the speaker 91A. The electrical signal detected by the second pickup 30A may also be amplified by the same amplifier 90A and transmitted to the speaker 91A. Alternatively, it may be amplified by a different amplifier 90B, or the amplified electrical signal may be transmitted to a different speaker 91B. Speakers 91A and 91B output the input electrical signal as sound. This produces a sound from the speakers 91A and 91B. This sound can be adjusted by changing the amplification characteristics of amplifiers 90A and 90B. Filters may be placed before and after amplifiers 90A and 90B as needed to remove noise and unwanted frequency components from the electrical signal.

[0123] In the golf club 1 shown in Figure 29, vibrations generated at the striking surface 2 of the head 3 are transmitted not only to the grip 6 via the hosel 4 and shaft 5, but also to the grip 6 via the vibration transmission member 20. By incorporating the vibration transmission member 20 into the golf club 1, vibrations from the striking surface 2 can be efficiently transmitted to the grip 6 without attenuation. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs. In addition, the vibration of the vibration transmission member 20 is detected by the first pickup 20A, this vibration is converted into an electrical signal, amplified by the amplifier 90A, and then output as sound from the speaker 91A. As a result, both the feel and the sound are output, and the synergistic effect provides the user with a good feel.

[0124] In the golf club 1 shown in Figure 30, not only are the vibration transmission members 20 built into the hosel cavity 8 and the shaft cavity 9, but an auxiliary vibration transmission member 30 is also built into the head cavity 7 (fourth cavity). By building the auxiliary vibration transmission member 30 into the head 3 in this way, vibrations generated at the striking surface 2 of the head 3 can be efficiently transmitted to the vibration transmission member 20 without attenuation, further improving the feel of the shot. In addition, the vibration of the auxiliary vibration transmission member 30 is detected by the second pickup 30A, and a sound corresponding to this vibration is output from speakers 91A and 91B. As a result, both the feel and the sound of the shot are output, and the synergistic effect provides the user with a good feel of the shot.

[0125] In particular, when a vibration transmission member 20 and an auxiliary vibration transmission member 30 are provided, the vibrations transmitted by the vibration transmission member 20 and the auxiliary vibration transmission member 30 are detected by the respective pickups 20A and 30A. The electrical signals resulting from these vibrations are amplified by amplifiers 90A and 90B, filtered as appropriate, and emitted as a sound from speakers 91A and 91B. This provides the user with an even better feel when hitting the ball.

[0126] Speakers 91A and 91B can be shared, and amplifiers 90A and 90B can also be shared as needed. As shown in Figure 31, in a golf club 1 equipped with multiple vibration transmission members 20 and auxiliary vibration transmission members 30, each pickup 20A, 30A may be provided separately for each vibration transmission member 20 and auxiliary vibration transmission member 30, or they may be used in common.

[0127] Furthermore, as shown in Figure 32, in a golf club 1 without a hosel 4, a first pickup 20A may be provided near the vibration transmission member 20. Also, as shown in Figures 33 and 35, in a golf club 1 without a hosel 4, a first pickup 20A may be provided near the vibration transmission member 20, and a second pickup 30A may be provided near the auxiliary vibration transmission member 30. Furthermore, as shown in Figure 34, in a golf club 1 equipped with a surface vibration member 15, the surface vibration member 15 and the head internal wire 30 (auxiliary vibration transmission member) may be connected by a connecting wire 40, and a third pickup 40A may be provided near the connecting wire 40. The third pickup 40A is a sensor with the same function as the other pickups 20A and 30A. In other words, the electrical signal detected by the third pickup 40A is amplified by the amplifier 90C built into the golf club 1, as shown in Figure 36, and then transmitted to the speaker 91C. In this case as well, speakers 91A to 91C can be shared, and amplifiers 90A to 90C can also be shared as needed. As shown in Figure 34, in a golf club 1 equipped with multiple connecting wires 40, a pickup 40A may be provided separately for each connecting wire 40, or it may be used for shared use.

[0128] In these golf clubs 1 as well, the same functions and effects as those described for the golf club 1 having the hosel 4 can be obtained. Of course, in these examples as well, the speakers 91A to 91C can be shared, and the amplifiers 90A to 90C can also be shared as needed. Furthermore, in the case where multiple vibration transmission members 20, auxiliary vibration transmission members 30, and connecting wires 40 are provided, each pickup 20A, 30A, and 40A may be provided separately for each vibration transmission member 20, auxiliary vibration transmission member 30, and connecting wire 40, or they may be used in common.

[0129] In this embodiment, the amplifiers 90A-90C and speakers 91A-91C may be replaced with smartphones or computers (information terminals, etc.). In this case, the speakers 91A-91C may be in the form of earphones or headphones and worn on the user's ears. Furthermore, the connection between each pickup 20A, 30A, 40A and the amplifiers 90A-90C may be a wired or wireless connection. Similarly, the connection between the amplifiers 90A-90C and the speakers 91A-91C may be a wired or wireless connection.

[0130] [VI. Description of the Sixth Embodiment] The sixth embodiment is a golf club 1 in which a liquid crystal display 100, which serves as an electrical display element capable of indicating the launch direction of the golf ball, is provided on the upper surface of the head 3. This liquid crystal display 100 is configured, for example, as a color liquid crystal display and is capable of displaying color images. Furthermore, the liquid crystal display 100 can be applied to a golf club 1 with a hosel 4, as shown in Figure 37(A), or to a golf club 1 without a hosel 4, as shown in Figure 37(B).

[0131] As shown in Figure 38, the liquid crystal display 100 is connected to the indicator 102 (input device) via the controller 101. When an instruction for display is given to the indicator 102, this instruction is transmitted to the liquid crystal display 100 via the controller 101, and the launch direction of the golf ball is displayed on the liquid crystal display 100. In this embodiment, the other components are substantially the same as those in the previously described embodiment, so a detailed explanation is omitted.

[0132] The display on the liquid crystal display 100 may be an arrow indicating the launch direction of the golf ball, or it may be a series of interconnected circles. In this case, the circles may become smaller as they move towards the tip indicating the direction. This configuration improves the feel of the shot and also enhances convenience by allowing the launch direction of the golf ball to be freely displayed on the liquid crystal display 100.

[0133] The indicator 102 and controller 101 can also be replaced with a smartphone. In this case, it is preferable to use a wireless connection between the controller 101 and the LCD display 100. Furthermore, the content of the instructions input to the indicator 102 may be input by, for example, the user of the golf club 1, an instructor (trainer), or an assistant (caddy).

[0134] In this embodiment, in addition to displaying the launch direction of the golf ball on the liquid crystal display 100, a rhythm box function can also be incorporated to indicate the rhythm when the golf ball is launched. In this case, a controller 101 having either a rhythm box function or a synthesized voice generation function is provided to indicate the rhythm when the golf ball is launched, and a speaker 100A is provided to output either the rhythm sound or the synthesized voice generated by either the rhythm box function or the synthesized voice generation function of the controller 101 (see Figure 38).

[0135] Furthermore, one or more impact sensors 103 can be installed inside the head 3, and when a golf ball hits the striking surface 2, the impact data can be detected by the impact sensors 103 and collected by the controller 101, and this impact data can be displayed on the liquid crystal display 100 as numerical values, graphs, etc. (see Figure 38).

[0136] Furthermore, if the system can detect the difference in impact data between the sweet spot and other areas of the hitting surface 2, the impact data for when the golf ball hits the sweet spot and when it does not can also be displayed numerically or graphically on the liquid crystal display 100 via the controller 101. In this case, it is preferable that the numerical or graphical impact data be displayed after the launch direction of the golf ball. Alternatively, the launch direction and impact data may be displayed alternately at a predetermined interval.

[0137] [VII. Others] Figures 39(A) and (B) are side views illustrating modified versions of the golf club 1 described in the first to sixth embodiments. One of several adapters 3A and 3B is detachably attached to the underside of the head 3 of the golf club 1. Multiple types of these adapters 3A and 3B are available, differing, for example, in shape, mass, center of gravity, etc. For example, the adapter 3A shown in Figure 39(B) is used when it is desired to increase the lie angle L compared to the adapter 3B shown in Figure 39(A). Although Figures 39(A) and (B) illustrate a golf club 1 without a hosel 4, the presence or absence of a hosel 4 is irrelevant.

[0138] Adapters 3A and 3B are intended to be attached to the underside of the head 3 by, for example, the user or instructor (trainer) of the golf club 1, by selecting one of them. Adapters 3A and 3B are preferably attached to the underside of the head 3 via an easily detachable locking structure (clip) or fastening structure (screw). By using adapters 3A and 3B that are suitable for the user's physique and swing form, it becomes easier to optimize the swing trajectory of the golf club 1, thereby improving the effectiveness of practice. The lie angle L refers to the angle that the shaft 5 makes with respect to the horizontal plane when the hitting surface 2 of the head 3 is viewed horizontally from the front, and the angle that is closer to the user than the shaft 5. Furthermore, as described above, the examples in Figures 39(A) and (B) can be applied to any of the golf clubs described in the first to sixth embodiments, and in that case, it goes without saying that the configuration other than the adapters 3A and 3B and their mounting method is the same as that of each embodiment.

[0139] In the first embodiment, the vibration sensor 81, vibration device 82, and speaker 82A described with reference to Figure 15 can be applied to any of the second to sixth embodiments. Furthermore, the various vibration transmission members 20 and auxiliary vibration transmission members 30 shown in the first and second embodiments can of course be applied to the golf clubs of the third, fourth, and sixth embodiments. In addition, the insert described in the third embodiment can of course be provided on the striking surface 2 of the head 3 of the first, second, fourth to sixth embodiments.

[0140] Furthermore, similar to the fourth embodiment, it goes without saying that in the first to third, fifth, and sixth embodiments, one or more fins or plate members 86 can be provided between the head 3 and one end of the shaft 5 or the hosel 4. Moreover, although a putter was used as an example of a golf club 1 in each of the first to sixth embodiments described above, the invention can of course be applied to other golf clubs (woods, hybrids, utilities, etc.). Note that in each of the first to sixth embodiments described above, members indicated by the same reference numerals refer to the same components. Furthermore, although not shown in the diagram, a battery for the circuit that amplifies the signals detected by the sensors and pickups and outputs them through the speaker can be provided inside or outside the golf club as needed. If a portion of the above circuit is shared with a smartphone, the smartphone's battery will also serve as the battery for the above circuit.

[0141] Furthermore, a switch SW1 (shown by a dashed line in Figure 36) may be interposed in the circuit shown in Figure 36. The position where the switch SW1 is interposed is, for example, set between the pickups 20A, 30A, 40A and the amplifiers 90A, 90B, 90C, or between the amplifiers 90A, 90B, 90C and the speakers 91A, 91B, 91C. When the switch is ON, sounds based on the detection information from the pickups 20A, 30A, 40A and the sensors are amplified by the amplifiers 90A, 90B, 90C and output from the speakers 91A, 91B, 91C. On the other hand, when the switch is OFF, no such sounds are output. The ON / OFF state of the switch SW1 can be selected by the user as appropriate. For example, the switch SW1 is positioned so that it can be operated from the outside of the golf club 1. Alternatively, a switch SW1 that can be switched on or off via wireless communication is used.

[0142] Furthermore, if a changeover switch SW2 is installed in the circuit shown in Figure 38, and this switch SW2 is switched to connect to the liquid crystal display 100, the liquid crystal display 100 will display the launch direction and digitized and graphed impact data. If the switch SW2 is switched to connect to the speaker 100A, either the rhythm sound or synthesized voice generated by either the rhythm box function or the synthesized voice generation function of the controller 101 will be output from the speaker 100A. If the switch SW2 is switched to connect to both the liquid crystal display 100 and the speaker 100A, the liquid crystal display 100 will display the launch direction and digitized and graphed impact data, and either the rhythm sound or synthesized voice will be output from the speaker 100A.

[0143] Of course, if you turn off both the LCD display 100 and speaker 100A using switch SW2, the LCD display 100 will not display anything, and the rhythm sounds and synthesized voices from speaker 100A will not be output. In Figure 38, if only the liquid crystal display 100 is provided, switch SW2 can be an on / off switch. Furthermore, this golf club 1 can employ various manufacturing methods in addition to, or instead of, the standard manufacturing methods for golf clubs. For example, the product can be manufactured using a 3D printer, seamless welding, casting, or a combination of these methods as appropriate. [Explanation of Symbols]

[0144] 1. Golf club (putter) 2.2′ Striking surface (face) 3 heads 3A, 3B adapter 4. Hosel 4A Top surface 4B Lighting components 5 shafts 6 Grips 7. Head cavity (fourth cavity) 8 Hosel cavity (first cavity) 9. Shaft cavity (second cavity) 10. Grip cavity (third cavity) 11 Opening 12 Head opening 13 fins 13A Top surface 13B Lighting component 14 Head body 15. Surface vibrating member 16 Net components 17 Membrane members 18 frames 19 string 20. Vibration transmission member (wire inside the shaft) 20A 1st Pickup 21. Upper end plate of the grip 22 Fixtures 23 Grip inner plate (mounting component) 24. Grip internal fixing device (mounting component) 25 Binding section 26 Mass member 27 Connecting fittings 28. Grip upper end fixing device 30. Auxiliary vibration transmission member (wire inside the head) 30A Second Pickup 31 Head tip 32 Head base 33 Head tip fixing device 34 Head base end fixing device 35. Head internal plate 36 Head internal fixing device 37 Binding section 40 connecting wires 40A 3rd pickup 41 racks 42 pinion 43 Motor 44. Winding device (mounting component) 51 Bottom edge 52 First side 53 Second side 54 Top 55 Telescopic mechanism 56 Telescopic mechanism 57 Telescopic mechanism 58. Slide mechanism 61 Weight member 62. Motor for weights (drive source) 81 Vibration Sensor 82 Vibration device 82A Speaker 86 Fin or plate member 86A Top 86B Lighting component 90A, 90B, 90C Amplifier 91A, 91B, 90C speakers 100 LCD displays 100A speaker 101 Controller 102 Indicator 103 Impact Sensor SW1, SW2 switches

Claims

1. A head having a striking surface for hitting a golf ball, A shaft formed in an axial shape, A hosel connecting one end of the shaft to the head, The shaft is provided with a grip at the other end for the user to hold, On the upper surface of the head, thin, plate-like fins are erected, extending in the direction in which the striking surface extends when viewed from above, and having a curved or corrugated shape. An illumination member is positioned on the top surface of the aforementioned fin. A golf club characterized by the following features.

2. A head having a striking surface for hitting a golf ball, A shaft formed in an axial shape, The shaft is provided with a grip at the other end for the user to hold, On the upper surface of the head, thin, plate-like fins are erected, extending in the direction in which the striking surface extends when viewed from above, and having a curved or corrugated shape. An illumination member is positioned on the top surface of the aforementioned fin. A golf club characterized by the following features.

3. The lighting member includes an LED or a fluorescent material. A golf club according to claim 1 or 2, characterized in that it is a golf club.

Images