Golf clubs, golf practice systems, and mobile devices

Abstract

A golf club (1) of the present disclosure is provided with: a head (3) having a striking surface (2) for striking a golf ball; a shaft (5) having a shaft shape; a hosel (4) connecting the head (3) to one end of the shaft (5); and a grip (6) that is provided at the other end of the shaft (5) and is to be gripped by a user. The hosel (4) is integrally formed with the head (3) and the shaft (5) in a non-replaceable state. A first cavity (9) formed in a hollow space inside the shaft (5). A second cavity (10) that communicates with the first cavity (9) is formed in a hollow space in the grip (6). A vibration transmission member (20) is provided that is formed in an elongated shape, has one end fixed to the hosel (4), is built inside the first cavity (9) and the second cavity (10), and transmits vibration generated at the striking surface (2) to the grip (6). Attachment members (23, 24) for linking the grip (6) to the other end of the vibration transmission member (20) are provided inside the second cavity (10).

Description

Technical Field

[0001] The present invention relates to a golf club for hitting a golf ball, a detachable unit for a vibration transmission member, a detachable unit for a tuning fork-type sounding body, a detachable unit for a reinforcing member, a golf practice system applying the golf club, a grip of the golf club, and a portable mobile terminal.

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 detachably fixed 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).

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.

[0005] One of the objectives of this invention is to provide a golf club designed to improve the feel of the ball, a detachable unit for a vibration transmission member, a detachable unit for a tuning fork-type sound-producing body, a detachable unit for a reinforcing member, a golf practice system, a golf club grip, and a portable mobile terminal, all of which were devised in light of the aforementioned problems. Furthermore, not limited to this objective, another objective of this invention is to achieve effects and benefits derived from each configuration shown in the "Modes for Carrying Out the Invention" described later, which cannot be obtained with conventional technology. [Means for solving the problem]

[0006] This can be realized in the manner or application described below. The disclosed golf club solves 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, and a hosel connecting one end of the shaft to the head, The device comprises a grip provided at the other end of the shaft for the user to grasp, the hosel being integrally formed with the head and the shaft in a non-replaceable manner, the shaft having a first hollow cavity inside, the grip having a second hollow cavity inside that communicates with the first cavity, the grip being integrally formed with the shaft, elongated and with one end fixed to the hosel, and housed in the first and second cavities, and comprising a vibration transmission member that transmits vibrations generated on the striking surface to the grip, and a mounting member provided inside the second cavity that connects the other end of the vibration transmission member to the grip.

[0007] (2) The disclosed golf club also 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, the shaft has a first hollow cavity formed inside, the grip has a second hollow cavity formed inside that communicates with the first cavity, the grip is formed integrally with the shaft, one end of which is fixed to the hosel, and at least one end of which is housed in the first cavity, and the grip also comprises a tuning fork-type sound-producing element that vibrates in response to the impact of striking the golf ball with the striking surface to produce sound.

[0008] (3) Furthermore, the detachable vibration transmission unit disclosed 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 gripping by the user, wherein the shaft has a first hollow cavity formed inside, and the grip has a second hollow cavity formed inside that communicates with the first cavity, and is detachably attached to a golf club, a main body that is built into the first cavity and the second cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference shape of the first cavity and the second cavity, and has a hollow cavity formed inside, and a vibration transmission member that is formed in an elongated shape, has one end fixed to the lower end of the main body, is built into the hollow cavity, and transmits vibrations generated on the striking surface to the grip. (4) The detachable vibration transmission unit disclosed 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, wherein the shaft has a first hollow cavity formed inside, and the grip has a second hollow cavity formed inside that communicates with the first cavity, and is detachably attached to a golf club, a main body that is housed in the first cavity and the second cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity and the second cavity, and has a hollow cavity formed inside, and a vibration transmission member that is formed in an elongated shape, has one end fixed to the lower end of the main body, is housed in the hollow cavity, and transmits vibrations generated on the striking surface to the grip.

[0009] (5) The disclosed detachable unit of a tuning fork-type sound-producing body 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 grasp, and the shaft having a first hollow part formed inside, and is detachably attached to a golf club having a first hollow part formed inside, and is housed in the first hollow part, extends in the axial direction of the shaft and has a cylindrical shape that conforms to the inner circumference shape of the first hollow part and has a hollow part formed inside, and a tuning fork-type sound-producing body formed in an elongated shape with one end fixed to the lower end of the main body and housed in the hollow part, and vibrates in response to the impact of striking the golf ball with the striking surface to produce sound. (6) The detachable unit of the tuning fork-type sound-producing body disclosed comprises a head having a striking surface for striking a golf ball, a shaft formed in an axial shape, a grip provided at the other end of the shaft for being held by the user, and the shaft having a first hollow part formed inside, and a main body that is built into the first hollow part, extends in the axial direction of the shaft and has a cylindrical shape that conforms to the inner circumference shape of the first hollow part and has a hollow part formed inside, and a long, elongated tuning fork-type sound-producing body that is fixed at one end to the lower end of the main body and built into the hollow part, and vibrates in response to the impact of striking the golf ball with the striking surface to produce sound.

[0010] (7) The disclosed reinforcing member detachable unit 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, a grip provided at the other end of the shaft for gripping by the user, and a main body which is detachably attached to a golf club having a first hollow part formed inside the shaft, is housed in the first hollow part, extends in the axial direction of the shaft and has a cylindrical shape that conforms to the inner circumference shape of the first hollow part and has a hollow part formed inside, and a reinforcing member which is housed in the hollow part and reinforces the strength of the shaft. (8) The detachable reinforcing member unit disclosed comprises a head having a striking surface for striking a golf ball, a shaft formed in an axial shape, a grip provided at the other end of the shaft for being held by the user, and the shaft having a first hollow part formed inside, and is detachably attached to a golf club having a first hollow part formed inside, and is housed in the first hollow part, extends in the axial direction of the shaft and has a cylindrical shape that conforms to the inner circumference shape of the first hollow part and has a hollow part formed inside, and a reinforcing member housed in the hollow part and reinforcing the strength of the shaft.

[0011] (9) The disclosed golf practice system includes: a cup provided on the rolling surface (golf ball rolling surface) of a golf ball struck by the golf club described in (1) or (2); a hitting area located away from the cup and having the golf ball rolling surface; a rod-shaped pin erected in a removable manner in relation to the cup and serving as a marker for the cup; a first irradiator attached to the pin and irradiating a guide laser beam that shows a straight line from the pin toward the hitting area; a first receiver attached to the golf club and capable of receiving the guide laser beam from the first irradiator; a second irradiator attached to the golf club and irradiating a guide sub-laser beam from the golf club toward the pin; a second receiver attached to the pin and capable of receiving the guide sub-laser beam from the second irradiator; and a display that indicates when the first receiver receives the guide laser beam and when the second receiver receives the guide sub-laser beam.

[0012] (10) The disclosed golf practice system includes a cup provided on the rolling surface (golf ball rolling surface) of a golf ball struck by the golf club described in (1) or (2), and a hitting area spaced apart from the cup and having the golf ball rolling surface, wherein a user standing in the hitting area strikes the golf ball with the golf club toward the cup; a pin unit having a first shooting means attached to a rod-shaped pin that marks the cup and takes images from the pin toward the hitting area, a second transmitting device that transmits the first image data taken by the first shooting means to the outside, and a first irradiator that irradiates a guide laser beam from the pin toward the hitting area; a vibration detection means attached to the golf club used by the user in the hitting area and detecting vibration information relating to the vibration transmitted by the vibration transmission member; a second detection means built into the head and detecting impact information relating to the impact of the golf ball; and A club unit having a second shooting means for shooting images from the head toward the front, a second irradiator for irradiating guide sub-laser light toward the head toward the front, and a third transmitting device for transmitting the vibration information, the impact information, and the second video data captured by the second shooting means to the outside; a control unit having a first receiving device for receiving the cup-in information transmitted from the first transmitting device, the first video data transmitted from the second transmitting device, and at least one of the vibration information, the impact information, and the second video data transmitted from the third transmitting device as monitor information, a control device for generating guide information to provide guidance for the user's golf play based on the monitor information, and a fourth transmitting device for transmitting the guide information to the outside; and a terminal device that the user can carry, having a second receiving device for receiving the guide information transmitted from the fourth transmitting device, and a presenter for presenting guidance for golf play based on the guide information.

[0013] (11) The disclosed golf club grip comprises a shaft formed in an axial shape, a head provided on one end of the shaft and having a striking surface for striking a golf ball, and a grip provided on the other end of the shaft and held by the user, wherein the grip is provided with a grip member made of a mesh member formed from resin fibers in a net shape.

[0014] (12) The disclosed golf club is the golf club described in (1) above, wherein the head has a weight member for changing the center of gravity of the head. (13) The disclosed golf club is the golf club described in (12) above, wherein the weight member is provided inside a hollow cylindrical recess formed in the upper surface of the head, and comprises a drive source for moving the weight member, and a control unit for controlling the drive source so that the drive source rotates the weight member along the inner circumferential surface of the recess. (14) The disclosed golf club is the golf club described in (12) above, wherein the weight member is provided inside a linear recess formed in the upper surface of the head, and comprises a drive source for moving the weight member, and a control unit for controlling the drive source so that the drive source slides the weight member along the inner circumferential surface of the recess. (15) The disclosed portable mobile terminal is a portable mobile terminal that exchanges control signals with the control unit of the golf club described in (13) or (14) above, and comprises an input unit for inputting instructions to move the weight member to a desired position, and a display unit for monitoring and displaying the position of the weight member after it has moved in response to the movement instructions from the input unit. [Effects of the Invention]

[0015] According to the disclosed golf club, by providing a vibration transmission member in the hosel, the vibrations generated when the golf ball is struck can be efficiently transmitted to the shaft, thereby improving the feel of the shot. Furthermore, according to the disclosed golf club, the striking surface has a tuning fork-shaped sound-producing element that vibrates and emits sound in response to the impact of hitting the golf ball, thus enhancing the sound produced when hitting the golf ball. Therefore, the feel of hitting the golf ball is improved, and the overall feel of the shot can be enhanced.

[0016] According to the disclosed vibration transmission member attachment / detachment unit, the vibration transmission member can be easily attached to and detached from the golf club. Furthermore, the detachable tuning fork-shaped sound-producing unit disclosed makes it easy to attach and detach the tuning fork-shaped sound-producing unit from the golf club. Furthermore, the detachable reinforcing member unit disclosed can reinforce the shaft of a golf club. The detachable vibration transmission member unit and the detachable tuning fork-type sound-producing unit can also reinforce the shaft of a golf club. When the shaft is reinforced with a detachable unit, the shaft's thickness can be reduced while maintaining its strength, thereby improving the shaft's vibration transmission. This allows for increased impact vibration and improved feel.

[0017] According to the disclosed golf practice system, it is possible to improve the effectiveness of practice. Furthermore, according to the disclosed golf practice system, the monitor information includes vibration information related to the vibration transmission member, making it possible to provide guidance based on vibration information. For example, it is possible to analyze the correlation between vibration information and impact information (other monitor information) (e.g., the relationship between vibration and the quality of the impact), present the analysis results, accumulate these analysis results, and provide feedback to the user. It is also possible to visualize (make visible) the vibration information using numerical values ​​or graphs, or to accumulate the vibration information as big data.

[0018] According to the disclosed golf club grip, the grip material is made of a mesh member formed from resin fibers in a net-like structure, which tends to easily transmit vibrations from the shaft to the user's hand through the grip material. Therefore, the feel of the ball can be improved. In addition, according to the disclosed mobile terminal, the position adjustment of the weight member can be easily and visually understood.

Brief Description of the Drawings

[0019] [Figure 1] (A) is a perspective view illustrating a golf club as a first embodiment, and (B) is a perspective view for explaining a modification example of a hosel in the golf club as the first embodiment. [Figure 2] (A) to (C) are perspective views for explaining the types of heads of a golf club. [Figure 3] (A) to (F) are perspective views for explaining modification examples regarding the connection between the hosel and the shaft of a golf club. [Figure 4] (A) to (D) are perspective views for explaining modification examples of the hosel of a golf club. [Figure 5] (A) to (C) are cross-sectional views illustrating the internal structure of the golf club shown in Fig. 1(A). [Figure 6] (A) to (C) are cross-sectional views illustrating the internal structure of the golf club shown in Fig. 1(B). [Figure 7] (A) and (B) are cross-sectional views for explaining a modification example of the internal structure of the golf club shown in Fig. 1(A). [Figure 8] (A) and (B) are cross-sectional views for explaining a modification example of the internal structure of the golf club shown in Figs. 7(A) and (B). [Figure 9] (A) to (C) are cross-sectional views for explaining a modification example of the internal structure of a golf club. [Figure 10] (A) and (B) are cross-sectional views for explaining a modification example of the internal structure of the golf club shown in Figs. 9(B) and (C). [Figure 11] (A) and (B) are cross-sectional views for explaining a modification example of the internal structure of the golf club shown in Fig. 10(B). [Figure 12] (A) and (B) are cross-sectional views for explaining a modification example of the internal structure of the golf club shown in Figs. 11(A) and (B). [Figure 13] (A) to (C) are explanatory diagrams illustrating variations in the internal structure of a golf club. [Figure 14] (A) and (B) are cross-sectional views illustrating a modified example of the vibration transmission member. [Figure 15] (A) to (G) are explanatory diagrams illustrating modified examples of vibration transmission members. [Figure 16] (A) to (F) are cross-sectional views illustrating modified examples of vibration transmission members. [Figure 17] (A) and (B) are cross-sectional views illustrating a modified example of the vibration transmission member. [Figure 18] (A) to (D) are cross-sectional views illustrating variations of a golf club. [Figure 19] (A) to (E) are explanatory diagrams illustrating variations of the hosel of a golf club. [Figure 20] (A) to (E) are cross-sectional views illustrating a modified example of the vibration transmission member. [Figure 21] This is a cross-sectional view illustrating a modified internal structure of a golf club. [Figure 22] (A) and (B) are perspective views illustrating variations of a golf club head. [Figure 23] This is a perspective view illustrating variations of a golf club. [Figure 24] This is an explanatory diagram illustrating a modified version of the golf club shown in Figure 23. [Figure 25] (A) and (B) are diagrams illustrating variations of a golf club. [Figure 26] This is a block diagram illustrating the configuration of a golf practice system using golf clubs. [Figure 27] (A) and (B) are diagrams illustrating variations of a golf club. [Figure 28] (A) to (E) are explanatory diagrams illustrating variations of a golf club. [Figure 29](A) to (D) are explanatory diagrams illustrating variations of a golf club. [Figure 30] (A) to (D) are explanatory diagrams illustrating variations of a golf club. [Figure 31] (A) to (F) are explanatory diagrams illustrating the detachable unit for the vibration transmission member / tuning fork-type sound-producing body. [Figure 32] (A) to (E) are explanatory diagrams illustrating variations of a golf club. [Figure 33] Figures 23 and 24 are processing block diagrams related to the golf club. [Figure 34] Figure 22 is a block diagram of the processing related to a golf club. [Figure 35] (A) and (B) are diagrams illustrating variations of a golf club. [Figure 36] Figure 35 is a block diagram of the processing related to a golf club. [Figure 37] (A) to (C) are explanatory diagrams illustrating variations of a golf club. [Figure 38] (A) and (B) are explanatory diagrams illustrating modified versions of the detachable unit. [Modes for carrying out the invention]

[0020] [I. Description of the First Embodiment] [1. 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 the golf ball. The hosel 4 is a connecting member that connects the lower end (one end) of the shaft 5 to the head 3. By connecting the lower end of the shaft 5 and the head 3 via the hosel 4, it is easier to connect the lower end of the shaft 5 and the head 3 compared to a structure without a hosel. The shape of the hosel 4 is not particularly limited and can be any well-known shape. In the golf club 1 shown in Figure 1(A), as an example of a hosel 4, a crank-shaped hosel 4A is provided, which has a crank shape with a first bend 4F and a second bend 4R (two bends) in the middle of the upper end 4U and the lower end 4D. In the golf club 1 shown in Figure 1(B), as another example of a hosel 4, a flat plate-shaped hosel 4B is provided, which extends in a plane direction parallel to the striking surface 2 and is formed in a rectangular plate shape with a certain thickness. In the following description, unless it is necessary to distinguish between them, the term "hosel 4" will be used as a general term for hosels of various shapes.

[0021] Figures 2(A) to 2(C) are perspective views illustrating different types of putter heads 3. The shape of the 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). In Figures 2(A) to 2(C), a golf club 1 having a flat hosel 4B as shown in Figure 1(B) is used as an example, but the shape of the hosel 4 may be any shape, including the crank-shaped hosel 4A in Figure 1(A).

[0022] 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 shape of the lower end of the shaft 5 fixed to the hosel 4 may be straight, as shown in Figures 1(A) and (B), or it may be a crank shape with two or more bends where the upper end is located further forward than the lower end (see Figure 4(A) described later), or it may be a bent shape (curved shape). In this specification, the direction in which the striking surface 2 faces when using the golf club 1 is referred to as "forward," and the opposite side is referred to as "rear."

[0023] The cross-sectional shape of shaft 5 may be circular, elliptical, or polygonal. Furthermore, 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.

[0024] The hosel 4 is formed integrally with the head 3 and shaft 5, for example, in a non-replaceable state. Figures 3(A) to 3(F) are perspective views illustrating some specific examples of connection configurations between the rectangular flat hosel 4B (hosel 4) and the shaft 5. 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). The hosel 4 may be detachably attached to the head 3 and shaft 5.

[0025] 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.

[0026] 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).

[0027] The hosel 4 may be formed in a flat or curved shape. If it is formed in a flat shape, it may be formed in a rectangular shape as shown in Figure 4(A), or in a polygonal shape (triangular or pentagonal). If it is formed in a curved shape, 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. Furthermore, the hosel 4 may be formed in an irregular quadrilateral shape that mimics the side shape of a horseshoe, as shown in Figure 4(D).

[0028] Furthermore, the hosel 4 and head 3 may be positioned flush with the striking surface 2 (forming the same plane), as shown in Figure 1(B), or they may be positioned as not flush with the striking surface 2 (the hosel 4 is positioned behind the striking surface 2), as shown in Figures 3(A) to (F). It goes without saying that in the various configurations of the hosel 4 and head 3 shown in Figures 3(A) to (F), the hosel 4 and head 3 may also be positioned flush with the striking surface 2, as shown in Figure 1(B).

[0029] <Cavity part> Of the head 3, hosel 4, shaft 5, and grip 6 included in the golf club 1, the shaft 5 and grip 6 are formed to be hollow (having a cavity inside). On the other hand, the head 3 and hosel 4 may be formed to be hollow (having a cavity inside) or solid (not having a cavity inside). Figures 5(A), (B), and (C) are cross-sectional views showing the longitudinal section of the golf club 1 in Figure 1(A), illustrating the case where hollows are formed inside the shaft 5 and grip 6, and the crank-shaped hosel 4A (hosel 4) and shaft 5 are solid.

[0030] The golf clubs 1 shown in Figures 5(A), (B), and (C) are all the same except for the way the hosel 4 and shaft 5 are connected. Specifically, in the golf club 1 of Figure 5(A), the upper end of the hosel 4 and the lower end of the shaft 5 are butted together and connected. In the golf club 1 of Figure 5(B), the inner circumference of the upper end of the hosel 4 is set to be larger than the outer circumference of the lower end of the shaft 5, and the lower end of the shaft 5 is inserted into the upper end of the hosel 4 for connection. In the golf club 1 of Figure 5(C), the outer circumference of the upper end of the hosel 4 is set to be smaller than the inner circumference of the lower end of the shaft 5, and the upper end of the hosel 4 is inserted into the lower end of the shaft 5 for connection.

[0031] The shaft 5 has a hollow shaft cavity 9 (first cavity) inside, and the grip 6 has a hollow grip cavity 10 (second cavity) inside that communicates with the shaft cavity 9. Both the upper and lower ends of the shaft 5 are open. The upper end of the grip 6 is closed by a grip upper end plate 21 that forms the grip end, and the lower end is open. The shaft cavity 9 and the grip cavity 10 are in communication with each other. The head 3 and hosel 4 are formed from solid material with a dense cross-section.

[0032] <Vibration transmission member> A vibration transmission member 20 is built into the inside of the golf club 1. The vibration transmission member 20 is a member that transmits vibrations generated at the striking surface 2 to the grip 6. The vibration transmission member 20 is formed in a long 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, wide straps, mesh straps), rod members (e.g., rod members made from rod-shaped metal or wood), linear elastic members (e.g., linear elastic members made from rubber or resin), and long coil springs. Examples of fibers include cellulose, nanocellulose, and cellulose nanofibers. Figures 5(A), (B), and (C) show an example where the vibration transmission member 20 is formed from a rod member.

[0033] One end of the vibration transmission member 20 (the lower end in Figures 5(A), (B), and (C)) is directly fixed to the hosel 4 via a fastener 22. On the other hand, the other end of the vibration transmission member 20 (the upper end in Figures 5(A), (B), and (C)) is attached to the inner surface of the grip 6 via an internal grip plate 23 and an internal grip fastener 24 (mounting member). The fastener 22 is, for example, a member attached to the upper end 4U of the hosel 4, and can have any structure as long as it can fix the lower end of the vibration transmission member 20. In this case, the vibration transmission member 20 is arranged linearly between the fastener 22 and the internal grip fastener 24. A mass member 26, which acts as a weight to amplify vibrations, may be attached to the vibration transmission member 20, as shown by the dashed line in Figure 5(A). 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, for example, the mass member 26 may be added according to the user's preference. The mass member 26 is not limited to the golf club 1 shown in Figure 5(A), but may be attached to any golf club 1.

[0034] Each golf club 1 shown in Figures 6(A), (B), and (C) is the same as each golf club 1 shown in Figures 5(A), (B), and (C), except that it has a flat hosel 4B as the hosel 4. That is, in each golf club 1 shown in Figures 6(A), (B), and (C), one end of the vibration transmission member 20, which is disposed inside the shaft cavity 9 and the grip cavity 10, is fixed to the flat hosel 4B via a fixing device 22.

[0035] Figures 7(A) and 7(B) show an example of the configuration of a golf club 1 in which the inside of the crank-shaped hosel 4A (hosel 4) is formed to be hollow. In Figures 7(A) and 7(B), a hosel cavity 8 (third cavity) is provided inside the hosel 4. The hosel 4 shown in Figure 7(A) is provided with a hosel cavity 8 formed to connect the upper end 4U and the lower end 4D. In this case, the hosel cavity 8 has a crank shape with two bends corresponding to the two bends 4F and 4R of the crank-shaped hosel 4A.

[0036] On the other hand, the hosel 4 shown in Figure 7(B) has a hosel cavity 8 in a portion of the hosel 4 located on the shaft 5 side (upper side), and the rest of the hosel 4, excluding the portion on the shaft 5 side (upper side), is solid. Specifically, the hosel 4 shown in Figure 7(B) has a hosel cavity 8 extending from the upper end portion 4U to the first bend portion 4F, and the portion located on the head 3 side of the first bend portion 4F, that is, the portion including the second bend portion 4R and the lower end portion 4D, is solid. In this case, the hosel cavity 8 is formed in a straight line from the upper end portion 4U to the first bend portion 4F.

[0037] In each golf club 1 shown in Figures 7(A) and (B), one end of the vibration transmission member 20, which is disposed inside the shaft cavity 9 and grip cavity 10, is fixed to the hosel 4 via a fastener 22. Figures 7(A) and (B) show an example where one end of the vibration transmission member 20 is fixed to the inner circumferential surface of the hosel cavity 8 via the fastener 22. Specifically, the fastener 22 is located at the first bend 4F and is disposed on the surface 8A of the inner circumferential surface of the hosel cavity 8 that faces the upper end portion 4U. In this case, one end of the vibration transmission member 20 is below the upper end portion 4U of the hosel 4 and is fixed inside the hosel cavity 8.

[0038] In the golf clubs 1 shown in Figures 5(A)-(C), 6(A)-(C), and 7(A)-(B) above, 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 hosel 4 and vibration transmission member 20. By incorporating the vibration transmission member 20 into the shaft 5 and grip 6 in this way, the vibration transmission paths can be increased, and vibrations generated on the striking surface of the head 3 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.

[0039] Figures 8(A) and 8(B) show modified versions of the golf club 1 shown in Figures 7(A) and 7(B), where the mounting structure of the lower end (one end) of the vibration transmission member 20 differs from that of Figures 7(A) and 7(B). In the crank-shaped hosel 4A (hosel 4) of the golf club 1 shown in Figures 8(A) and 8(B), a hole 8B is provided at the first bend 4F, on the inner circumferential surface 8A of the hosel cavity 8 facing the upper end 4U, connecting the hosel cavity 8 to the outside. The hole 8B is the mounting hole for the vibration transmission member 20. Specifically, the vibration transmission member 20 is inserted into the hosel cavity 8 from the outside of the hosel 4 through the hole 8B. The lower end 20D of the vibration transmission member 20 is formed wider than the diameter of the hole 8B, so that the lower end 20D of the vibration transmission member 20 is locked and mounted on the outside of the hole 8B.

[0040] In addition, in each of the golf clubs 1 shown in Figures 5(A)-(C), 6(A)-(C), 7(A),(B), and 8(A),(B), the grip internal plate 23 and grip internal fixing device 24 (mounting member) provided at the other end (upper end in the figures) of the vibration transmission member 20 may be provided so as to be able to adjust the position of the grip 6 in the extending direction. In this case, by adjusting the position of the grip internal plate 23 and grip internal fixing device 24 (mounting member) in the extending direction of the grip 6, the tension of the vibration transmission member 20 can be adjusted, and vibrations can be efficiently transmitted to the grip 6. Furthermore, the grip inner plate 23 may be formed as a film 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 inner plate 23 as a film, the grip inner plate 23 can be made to vibrate on a surface (film vibration), thereby improving the vibration transmission efficiency.

[0041] <Example of attachment to the grip end> Figures 9(A) and 9(B) show modified examples in which the mounting structure of the upper end (other end) of the vibration transmission member 20 differs from that of each golf club 1 shown above. In the golf club 1 shown in Figure 9(A), the other end of the vibration transmission member 20 (the upper end in the figure) is attached to the inner circumferential surface of the grip 6 via the grip upper end plate 21 and the grip internal fixing member 24 (mounting member).

[0042] <Example of a winding device> In the golf club 1 shown in Figure 9(B), a motor 43 and a winding device 44 are provided at the other end (upper end in the figure) of the vibration transmission member 20. The motor 43 and winding device 44 are mechanisms that allow the position of the other end of the vibration transmission member 20 to be adjusted in the extending direction of the grip 6. Here, the vibration transmission member 20 is formed of a windable member, and specifically consists of one of the following: a wire, a string, a linear elastic member, or a long coil spring. Figure 9(C) is a cross-sectional view of the golf club 1 as seen from the line X1-X1 in Figure 9(B). As shown in Figure 9(C), the winding device 44 is formed as a rod-shaped body extending along the cross-section of the grip 6, with a motor 43 connected to one end.

[0043] As shown in Figure 9(B), a pinion 42 is rotatably mounted on the motor 43. 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.

[0044] 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. Furthermore, in the golf club 1 shown in Figure 9(B), the rack and pinion may be omitted, and a mechanism may be formed to adjust the tension of the vibration transmission member 20 by winding / unwinding the other end of the vibration transmission member 20 using a motor 43 and a winding device 44.

[0045] The golf club 1 shown in Figure 10(A) is a modified example of the golf club 1 shown in Figure 9(B), and has an adjustment mechanism 44A (shown by a dashed line in the figure) that adjusts the position of the vibration transmission member 20 along an intersecting direction that intersects the extending direction of the grip 6. The intersecting direction adjustment mechanism 44A is built into the winding device 44 and includes, for example, a rack along the intersecting direction, a pinion meshed with the rack, and a motor that rotates the pinion. In this case, in addition to adjusting the position of the other end of the vibration transmission member 20 along the vertical direction shown by arrow AX in the figure, the position of the other end of the vibration transmission member 20 can also be adjusted along the intersecting direction shown by arrow CX in the figure.

[0046] <Example of providing multiple vibration transmission members> The golf club 1 shown in Figure 10(B) is another modified example of the golf club 1 shown in Figure 9(B). This golf club 1 has two (or more) vibration transmission members 20, 20' mounted in parallel to a set of racks 41, pinions 42, motors 43, and winding devices 44. The other ends (upper ends in the figures) of the two vibration transmission members 20, 20' are mounted in parallel to one winding device 44. One end (lower end, not shown) of the two vibration transmission members 20, 20' is attached to a fixing device 22 [such as in Figure 5(A)]. In this case, one fixing device 22 [such as in Figure 5(A)] may be provided corresponding to each of the lower ends of the two (or more) vibration transmission members 20, 20'. By providing two (or more) vibration transmission members 20, 20', vibrations are transmitted more efficiently to the shaft 5 and grip 6, allowing the user to feel precise and subtle vibrations.

[0047] <Example of arranging multiple winding devices in parallel> The golf club 1 shown in Figures 11(A) and 11(B) is a modified version of the golf club 1 shown in Figure 10(B), and has two sets of racks 41, 41', pinions 42, 42', motors 43, 43', and winding devices 44, 44' corresponding to two (or more) vibration transmission members 20, 20'. Figure 11(B) is a cross-sectional view of the golf club 1 taken along the line X2-X2 in Figure 11(A). As shown in Figure 11(B), the winding devices 44, 44' are arranged in a position parallel to each other.

[0048] <Example of arranging multiple winding devices in a cross pattern> The golf club 1 shown in Figures 12(A) and (B) is a modified version of the golf club 1 shown in Figures 11(A) and (B), and the arrangement of the two sets of racks 41, 41', pinions 42, 42', motors 43, 43', and winding devices 44, 44' differs from that in Figures 11(A) and (B). Specifically, as shown in Figures 12(A) and (B), the two sets of racks 41, 41', pinions 42, 42', motors 43, 43', and winding devices 44, 44' are arranged in a position where the winding devices 44, 44' intersect. In this case, the angle at which the winding devices 44, 44' intersect may be manually or electrically adjustable by an adjustment mechanism (not shown). Note that Figure 12(B) is a cross-sectional view of the golf club 1 as seen from the line X3-X3 in Figure 12(A).

[0049] <Disc-shaped mounting member> The golf club 1 shown in Figure 13(A) is a modified example of a mounting structure for two (or more) vibration transmission members 20, 20'. This golf club 1 is provided with a lower mounting member 27D (hosel-side plate) for attaching one end (lower end in the figure) of each of the two (or more) vibration transmission members 20, 20', and an upper mounting member 27U (grip-side plate) for attaching the other end (upper end in the figure). The lower mounting member 27D is attached to the upper end 4U of the hosel 4. That is, one end of each of the vibration transmission members 20, 20' is indirectly fixed to the upper end 4U of the hosel 4 via the lower mounting member 27D. The upper mounting member 27U is fixed to the inner circumferential surface of the grip 6 and is a mounting member that connects the upper ends of the vibration transmission members 20, 20' to the grip 6.

[0050] Figures 13(B) and (C) are plan views of the upper mounting member 27U and the lower mounting member 27D, respectively, as viewed from the direction of extension of the vibration transmission members 20 and 20'. As shown in Figures 13(B) and (C), the upper mounting member 27U and the lower mounting member 27D are each formed of a circular plate-shaped member having a surface that intersects the extending direction of the vibration transmission members 20 and 20'. As shown in Figure 13(A), the upper mounting member 27U and the lower mounting member 27D are arranged so that their plate surfaces intersect the extending direction of the vibration transmission members 20 and 20' and are parallel to each other.

[0051] As shown in Figures 13(B) and (C), the upper mounting member 27U and the lower mounting member 27D are each provided with multiple connecting holes 28U and 28D that penetrate from one surface to the other. The multiple connecting holes 28U and 28D are connecting parts for connecting the ends of each vibration transmission member 20 and 20'. One end of the vibration transmission member 20 is connected to one connecting hole 28D in the lower mounting member 27D, and one end of the vibration transmission member 20' is connected to another connecting hole 28D in the lower mounting member 27D. The other end of the vibration transmission member 20 is connected to one connecting hole 28U in the upper mounting member 27U, and the other end of the vibration transmission member 20' is connected to another connecting hole 28U in the upper mounting member 27U.

[0052] In a golf club 1 having an upper mounting member 27U and a lower mounting member 27D, one vibration transmission member 20, 20' can be attached to each of the connecting holes 28U, 28D of the upper mounting member 27U and the lower mounting member 27D. Therefore, multiple vibration transmission members 20, 20' can be provided, equal to the number of connecting holes 28U, 28D. It is preferable that the connecting holes 28U, 28D to which the multiple vibration transmission members 20, 20' are attached are arranged in a straight line so that the multiple vibration transmission members 20, 20' are parallel to each other. In this case, since multiple vibration transmission members 20, 20' are arranged in a forest-like fashion, it can be said that the multiple vibration transmission members 20, 20' are arranged in a harp-like shape.

[0053] The upper mounting member 27U may be attached to the upper end plate 21 (grip end). Alternatively, the upper end plate 21 itself may function as the upper mounting member 27U; that is, the upper end plate 21 may be provided with a plurality of connecting holes 28U. If the hosel 4 has a hosel cavity 8, the lower mounting member 27D may be attached to the inner circumferential surface of the hosel 4 within the hosel cavity 8. Alternatively, the lower mounting member 27D and the winding device 44 may be combined. In this case, the lower ends of the vibration transmission members 20, 20' are attached to the lower mounting member 27D, and their upper ends are attached to the winding device 44.

[0054] <Modified example of a vibration transmission member> Figures 14(A) and (B) are explanatory diagrams of modified examples of the vibration transmission member 20. The golf club 1 shown in Figures 14(A) and (B) differs from the golf club 1 shown in Figure 5(A) in the shape of the vibration transmission member 20, but is otherwise the same as the golf club 1 shown in Figure 5(A). The vibration transmission member 20 shown in Figure 14(A) has a wide portion 20A in the middle of its extension direction. The wide portion 20A is a part that is wider than its upper and lower portions. The wide portion 20A makes it possible to adjust the vibration transmission characteristics of the vibration transmission member 20 and improve the feel of the impact.

[0055] <Tuning fork type> The vibration transmission member 20 shown in Figure 14(B) has a tuning fork shape with its upper portion split into two (U-shaped) parts. In this case, one internal grip fixing device 24 is provided corresponding to each of the upper ends of the bifurcated vibration transmission member 20. The tuning fork shape of the vibration transmission member 20 allows vibrations of a specific frequency to be amplified by resonance.

[0056] <Tuning fork shape, Y-shape, ring shape> Figures 15(A) to (G) show examples of various shapes for the vibration transmission member 20. Here, a modified example is described in which the vibration transmission member 20 is composed of a rod member. Note that in Figures 15(A) to (G), only the vibration transmission member 20 is shown among the components of the golf club 1, and other elements are omitted. The vibration transmission member 20 shown in Figure 15(A) has a tuning fork shape with its lower portion split into two (U-shaped). In other words, it is the same shape as the vibration transmission member 20 shown in Figure 14(B) but inverted. In this case, one fixing device 22 [Figure 5(A), etc.] is provided corresponding to each of the lower ends of the bifurcated vibration transmission member 20.

[0057] The vibration transmission members 20 shown in Figures 15(B) and (C) have a Y-shape. The vibration transmission member 20 in Figure 15(B) has a Y-shape with the upper part split into two, and the vibration transmission member 20 in Figure 15(C) has a Y-shape with the lower part split into two. The vibration transmission member 20 shown in Figure 15(D) has an annular shape in the middle of its extension direction. The vibration transmission member 20 shown in Figure 15(E) is formed entirely in an annular shape and differs from the vibration transmission member 20 shown in Figure 15(D) in that it does not have linear sections on both the upper and lower sides. The vibration transmission members 20 shown in Figures 15(F) and (G) are modified examples of the tuning fork-shaped vibration transmission member 20 shown in Figures 14(B) and 15(A), and are formed entirely in a U-shape.

[0058] The vibration transmission members 20 shown in Figures 15(A) to (G) can be used to adjust the vibration transmission characteristics of the vibration transmission members 20 or to enhance vibrations by changing their shape, thereby providing the user with a better feel when hitting the ball. The shapes of the vibration transmission members 20 shown in Figures 15(A) to (G) are illustrative and not limited to those shown. For example, the entire vibration transmission member 20 may be formed in a V shape. Also, the upper or lower part of the vibration transmission member 20 may be branched into three or more prongs.

[0059] <Wire, string> The golf club 1 shown in Figures 16(A) and (B) is an example where the vibration transmission member 20 is made of a wire or string. The wire can be, for example, a steel wire or piano wire. The string can be, for example, a string made by weaving various fibers, or a string of various shapes such as a wide band, a mesh-like band, or a membrane-like band. In the vibration transmission member 20 shown in Figure 16(A), the lower end of the single wire or string that makes up the vibration transmission member 20 is fixed to a fixing device 22, and its upper end is fixed to a fixing device 24 inside the grip.

[0060] <Wire, string + sound-producing element> The vibration transmission member 20 shown in Figure 16(B) has multiple sound-emitting elements 20S attached along the direction of extension of the wire or string. Each sound-emitting element 20S is an object that emits sound in response to the vibration of the vibration transmission member 20. Examples of sound-emitting elements 20S include bells, beads, pieces of wood, metal pieces, and diaphragms. When multiple sound-emitting elements 20S are attached to the vibration transmission member 20 as shown in Figure 16(B), in addition to vibration, sound emitted from the sound-emitting elements 20S can be transmitted to the user. Furthermore, the structure for producing sound using a vibration transmission member 20 made of wire or string is not limited to a structure using a sound-producing body 20S, but can also be a structure (like a mukkuri or jaw harp) in which the sound generated by the vibration of the vibration transmission member 20 resonates within the shaft cavity 9 and the grip cavity 10.

[0061] The golf club 1 shown in Figure 16(C) is an example where the vibration transmission member 20 is composed of a chain. Here, a chain is a linkage member in which annular parts are connected in a linear fashion. The shape and connection configuration of the annular parts forming the chain can be any known type. Examples of chain types (shapes) include chain-like, armor-like, snake-like, and scale-like shapes.

[0062] <Coil spring> The golf club 1 shown in Figure 16(D) is an example where the vibration transmission member 20 is composed of a long coil spring. In this case, the lower end of the coil spring forming the vibration transmission member 20 is fixed to the fixing device 22, and its upper end is fixed to the internal grip fixing device 24. The coil spring forming the vibration transmission member 20 may be positioned so that its outer circumference is in contact with the inner surface of the shaft cavity 9, as shown in Figure 16(E), or it may be positioned so that its outer circumference is separated from the inner surface of the shaft cavity 9, as shown in Figure 16(F).

[0063] <Combination of multiple types of components> Furthermore, the vibration transmission member 20 may be composed of any combination of wires, strings, rod members, linear elastic members, or long coil springs (a structure made up of multiple members). For example, the vibration transmission member 20 shown in Figure 17(A) is constructed by connecting coil springs 20C to both the upper and lower sides of a rod member 20R. The tuning fork-type vibration transmission member 20 shown in Figure 17(B) is attached to a fixing device 22 and a grip-internal fixing device 24 via a wire 20W. In a structure in which the vibration transmission member 20 is made up of multiple members, the length ratio between each member is arbitrary.

[0064] <Opening, inspection window with cover> The golf club 1 shown in Figures 18(A) to (D) is an example in which the internal spaces of the hollow sections 8, 9, and 10 have openings that communicate with the outside. The golf club 1 shown in Figure 18(A) is a modified example of the golf club 1 shown in Figure 7(A). The crank-shaped hosel 4A (hosel 4) of this golf club 1 is provided with two openings 80A and 80B that connect the internal space of the hosel cavity 8 to the outside. The openings 80A and 80B are located in different positions. Opening 80A is provided between the upper end portion 4U and the first bend portion 4F. Opening 80B is provided between the second bend portion 4R and the lower end portion 4D.

[0065] Each of the openings 80A and 80B can be closed with a cover 81A or 81B. Each of the openings 80A and 80B can be considered a covered inspection window for visually checking the condition inside the hosel cavity 8 (hosel 4) from the outside. When using the device normally, other than for inspection, the user closes the openings 80A and 80B with the covers 81A and 81B, and removes the covers 81A and 81B to open the openings 80A and 80B when inspecting the inside. One example of what can be checked is the mounting condition of the vibration transmission member 20.

[0066] Furthermore, the openings 80A and 80B allow the reverberation sound generated within the hosel cavity 8 (hosel 4) when the head 3 strikes the ball to be transmitted to the outside of the hosel 4. This makes the sound heard by the user when the head 3 strikes the ball louder, further improving the feel of the shot. In other words, the openings 80A and 80B, which form inspection windows, also serve as openings for transmitting the reverberation sound from inside the hosel 4 to the outside. Although Figure 18(A) shows a golf club 1 with two openings 80A and 80B as an example, the hosel 4 may have one or more openings, and their locations may be arbitrarily set.

[0067] The shaft 5 of the golf club 1 shown in Figure 18(B) is provided with an opening 90 that connects the internal space of the shaft cavity 9 to the outside. The grip 6 of the golf club 1 shown in Figure 18(C) is provided with an opening 92 that connects the internal space of the grip cavity 10 to the outside. In Figures 18(B) and (C), each of the openings 90 and 92 functions as a covered inspection window that can be closed by covers 91 and 93. During normal use, except for inspections, the user closes the openings 90 and 92 with covers 91 and 93, and removes covers 91 and 93 to open the openings 90 and 92 when inspecting the inside of the shaft 5 or grip 6. These openings 90 and 92 also serve to transmit reverberant sounds from inside the shaft 5 and grip 6 to the outside.

[0068] The golf club 1 shown in Figure 18(D) is a modified example of the golf club 1 shown in Figure 1(B). The rectangular, flat hosel 4B (hosel 4) of this golf club 1 has a hosel cavity 8 inside, and an opening 80 is provided that connects the internal space of the hosel cavity 8 to the outside. The opening 80 functions as a covered inspection window that can be closed with a cover 81, and also serves as an opening for transmitting resonant sound from inside the hosel 4 to the outside. In this case, the fixing device 22 that fixes the lower end of the vibration transmission member 20 is attached to a fixing plate 22A that is installed inside the hosel cavity 8.

[0069] <Trapezoidal hosel> The golf club 1 shown in Figures 19(A) to (E) is a modified example relating to the shape of the hosel 4. In the golf club 1 shown in Figure 19(A), the hosel 4 is formed by a combination of a trapezoidal portion 4X that is trapezoidal (or roughly triangular) when viewed from the front, and a crank-shaped portion 4Y that extends upward from the top of the trapezoidal portion 4X. The crank-shaped portion 4Y has two bends in the middle of its extension direction. In this case, the head 3 is provided below the trapezoidal portion 4X, and the shaft 5 is provided above the crank-shaped portion 4Y. Here, as an example of the connection method between the crank-shaped portion 4Y (hosel 4) and the shaft 5, one end of the shaft 5 (the lower end in the figure) is inserted into the upper end of the crank-shaped portion 4Y (hosel 4) and connected. However, the connection method between the hosel 4 and the shaft 5 is not limited to this, and any of the connection methods exemplified in Figures 5(A) to (C) may be used.

[0070] Each golf club 1 shown in Figures 19(B) to (E) differs from the golf club 1 shown in Figure 19(A) in the detailed configuration of the hosel 4. Figures 19(B) to (E) show each golf club 1 in cross-sectional view. The golf club 1 shown in Figure 19(B) is constructed of solid material with a solid cross-section for both the trapezoidal portion 4X forming the hosel 4 and the crank-shaped portion 4Y. The lower end of the vibration transmission member 20 is fixed to the upper end of the crank-shaped portion 4Y via a fastener 22.

[0071] The golf club 1 shown in Figure 19(C) differs from the golf club 1 shown in Figure 19(B) in that it has a hosel cavity 8 in a part of the crank-shaped portion 4Y. That is, a hosel cavity 8 is provided in a part of the upper end of the crank-shaped portion 4Y, and the part other than the part in which the hosel cavity 8 is provided is made of a solid material with a solid cross-section. In this case, the lower end of the vibration transmission member 20 is fixed to the inner circumferential surface of the hosel cavity 8 via a fixing device 22.

[0072] The golf club 1 shown in Figure 19(D) differs from the golf club 1 shown in Figure 19(C) in that a hosel cavity 8 is provided along the entire length of the crank-shaped portion 4Y. In this case, the hosel cavity 8 is formed to connect the upper and lower ends of the crank-shaped portion 4Y. The lower end of the vibration transmission member 20 is fixed to the inner circumferential surface of the hosel cavity 8 via a fixing device 22.

[0073] The golf club 1 shown in Figure 19(E) differs from the golf club 1 shown in Figure 19(D) in that a hosel cavity 8 is provided in both the trapezoidal portion 4X and the crank-shaped portion 4Y that form the hosel 4. The lower end of the vibration transmission member 20 is fixed to the inner circumferential surface of the hosel cavity 8 via a fixing device 22. In the golf club 1 shown in Figure 19(E), the hosel cavity 8 is formed to connect the cavity in the trapezoidal portion 4X and the cavity in the crank-shaped portion 4Y, but the cavity in the trapezoidal portion 4X and the cavity in the crank-shaped portion 4Y may be separated and not connected.

[0074] <Example of a bent vibration transmission member> The golf clubs 1 shown in Figures 20(A) to (E) are modified examples of the configuration of the vibration transmission member 20. Each of the golf clubs 1 in Figures 20(A) to (C) has a crank-shaped hosel 4A similar to that in Figure 7(A), but the vibration transmission member 20 is different from that in Figure 7(A). In the golf club 1 shown in Figure 20(A), the vibration transmission member 20 has one bending point 29 and is bent at one point. In this case, the first vibration transmission member 20X, which is the portion of the vibration transmission member 20 that extends upward from the bending point 29, extends in the vertical direction. On the other hand, the second vibration transmission member 20Y, which is the portion of the vibration transmission member 20 that extends backward from the bending point 29, extends in the front-rear direction. In this vibration transmission member 20, the first vibration transmission member 20X and the second vibration transmission member 20Y are made of rod members.

[0075] In the golf club 1 shown in Figure 20(B), the vibration transmission member 20 differs from that in Figure 20(B) in that the second vibration transmission member 20Y, which extends rearward from the bending point 29, is composed of a long coil spring. The golf club 1 in Figure 20(C) has an auxiliary vibration transmission member 20Z installed in the hosel cavity 8, and a vibration transmission member 20 is attached to this auxiliary vibration transmission member 20Z via a connecting part 20K. The auxiliary vibration transmission member 20Z is positioned to extend in the front-rear direction within the hosel cavity 8 in the crank-shaped hosel 4A, and both ends of the auxiliary vibration transmission member 20Z are fixed to the inner circumferential surface of the hosel cavity 8 via fasteners. One end of the vibration transmission member 20 (the lower end in the figure) is attached to this auxiliary vibration transmission member 20Z. In other words, the vibration transmission member 20 can be said to be indirectly fixed to the hosel 4 via the auxiliary vibration transmission member 20Z. In each of the golf clubs 1 shown in Figures 20(A) to (C), vibrations from the striking surface 2 are transmitted from the hosel 4 through the vibration transmission member 20 to the grip 6, providing the user with a good feel and improving the feel compared to existing golf clubs. The auxiliary vibration transmission member 20Z shown in Figure 20(C) may also be attached to the hosel cavity 8 located inside the flat hosel 4B (hosel 4), as shown in Figure 18(D). In this case as well, a good feel can be provided to the user, improving the feel compared to existing golf clubs.

[0076] The golf club 1 shown in Figures 20(D) and (E) has a hosel 4 that combines a trapezoidal portion 4X and a crank-shaped portion 4Y, similar to that in Figure 19(D), but differs from Figure 19(D) in that a hosel cavity 8 is provided extending from within the crank-shaped portion 4Y and the upper portion (part) of the trapezoidal portion 4X. In Figure 20(D), the vibration transmission member 20 has two bending points 29 and is bent at two points along the bending shape of the hosel cavity 8.

[0077] In Figure 20(E), the vibration transmission member 20 is composed of a rod member 20R and a coil spring 20C. Specifically, the rod member 20R is disposed within the grip cavity (not shown) and the shaft cavity 9, and the coil spring 20C is disposed within the hosel cavity 8. The upper end of the coil spring 20C is connected to the lower end of the rod member 20R, and the lower end of the coil spring 20C is fixed to the upper part of the trapezoidal portion 4X. The coil spring 20C is disposed within the hosel cavity 8 in a shape that is bent at two points along the curved shape of the crank-shaped portion 4Y.

[0078] <Head cavity> The golf club 1 shown in Figure 21 has a head 3 with a hollow head cavity (fourth cavity) 7 inside, and the other components are the same as the golf club 1 shown in Figure 7(A). Because the head 3 has a head cavity 7, vibrations of the striking surface 2 are converted into vibrations of the air inside the cavity. As a result, vibrations generated on the striking surface 2 of the head 3 are transmitted to the grip 6 via the hosel 4 and vibration transmission member 20, providing the user with a good feel when hitting the ball, and the vibrations of the striking surface 2 can 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, and improve the feel when hitting the ball. Furthermore, in the golf club 1 shown in Figure 21, the head cavity 7, hosel cavity 8, shaft cavity 9, and grip cavity 10 are all connected, forming a single cavity, which allows the sound produced by the vibration of the striking surface to be transmitted more clearly to the user.

[0079] <Weight component> Figures 22(A) and (B) are perspective views illustrating modified heads 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 can also be adjusted manually by the user, or a weight motor 62 (drive source) can be provided to move the weight member 61. The golf club 1 equipped with the weight member 61 has a head 3, a hosel 4, a shaft 5, and a grip, with the grip 6 being integrally formed with the shaft 5, and vibration transmission members 20 being built into the shaft cavity 9 inside the shaft 5 and the grip cavity 10 inside the grip 6, the lower end of the vibration transmission member 20 being fixed to the hosel 4, and the grip cavity 10 having mounting members (internal grip plate 23 and internal grip fixing device 24) that connect the upper end of the vibration transmission member 20 to the grip 6.

[0080] Figure 22(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 recess. 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.

[0081] Figure 22(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.

[0082] <Vibration sensor> As a variation of the golf club 1 described above, various electrical devices, sensors, control devices (controllers), batteries, etc., may be built into the hosel 4. Figure 23 is a perspective view of the golf club 1 according to this modified example. The basic configuration of the golf club 1 in Figure 23 is the same as that of the golf club 1 shown in Figure 1(B) above, and it has a head 3, a hosel 4, a shaft 5, and a grip. The grip 6 is integrally formed with the shaft 5, and a vibration transmission member 20 is built into the shaft cavity 9 in the shaft 5 and the grip cavity 10 in the grip 6. The lower end of the vibration transmission member 20 is fixed to the hosel 4, and the grip cavity 10 has mounting members (internal grip plate 23 and internal grip fixing device 24) that connect the upper end of the vibration transmission member 20 to the grip 6. As shown in Figure 23, the golf club 1 may have a vibration sensor 95 built into the hosel 4 to detect vibrations transmitted from the hosel 4 to the vibration transmission member 20. The vibration sensor 95 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 95 may be placed inside it. By detecting vibrations with the vibration sensor 95, the magnitude and waveform of vibrations near the vibration source (striking surface 2) can be objectively captured, further improving the feel of the shot. Furthermore, the magnitude and waveform of the vibrations can be analyzed, and the results of this analysis can be used to enhance the effectiveness of golf practice.

[0083] Furthermore, a vibration device 96 (actuator) that vibrates based on vibration information detected by the vibration sensor 95 may be built into the hosel 4. If a hosel cavity 8 is formed inside the hosel 4, the vibration device 96 may be placed inside it. The vibration device 96 may function, for example, to amplify and output the vibration detected by the vibration sensor 95. By amplifying the vibration with the vibration device 96, the vibration actually transmitted to the user can be increased, further improving the feel of hitting the ball.

[0084] Furthermore, a speaker 96A that emits sound based on vibration information detected by the vibration sensor 95 may be built into the hosel 4. If a hosel cavity 8 is formed inside the hosel 4, the speaker 96A including an amplifier may be placed inside it. The speaker 96A may function, for example, to amplify and output the vibration detected by the vibration sensor 95 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 95 and can be heard as sound from the speaker 96A. At this time, the hollow hosel 4, shaft 5, and grip 6 function 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.

[0085] Furthermore, as shown in Figure 23, the grip 6 may also incorporate other vibration devices 97 (actuators) and a speaker 97A. The vibration devices 97 and speaker 97A are, for example, located inside the grip cavity 10 within the grip 6. Similar to the vibration devices 96 and speaker 96A described above, the vibration devices 97 and speaker 97A function to amplify and output the vibrations detected by the vibration sensor 95, or to amplify and output the vibrations detected by the vibration sensor 95 as sound. By generating vibrations and emitting sound within the grip 6, the vibrations and sounds actually transmitted to the user can be amplified, further improving the feel of the shot.

[0086] <Transmitter> The golf club 1 may further include a transmitter 101 for transmitting information detected by the vibration sensor 95 to an external device. The transmitter 101 may be built into, for example, the hosel 4. If a hosel cavity 8 is formed inside the hosel 4, the transmitter 101 may be placed inside it. The information detected by the vibration sensor 95 can be transmitted via the transmitter 101 to an external device, such as a computer (not shown), for example, by wireless or wired connection.

[0087] <Rhythm Box Function> The golf club 1 may be equipped with a controller 100 that has a rhythm box function for indicating the rhythm when the golf ball is launched, and a synthesized voice generation function. The controller 100 may be built into, for example, the hosel 4. If a hosel cavity 8 is formed inside the hosel 4, the controller 100 may be placed inside it. A speaker 96A is connected to the output side of the controller 100. Either the rhythm box function or the synthesized voice generation function of the controller 100 can output one of the rhythm sound or synthesized voice generated by the controller 100 from the speaker 96A when the golf ball is launched. The on / off switching of the rhythm box function and synthesized voice generation function of the controller 100, volume adjustment, and other various operations can be input from an indicator (not shown). The indicator may be built into the golf club 1. Alternatively, the indicator may be configured as an external device (e.g., a smartphone) connected by wireless connection. Furthermore, the various functions of the controller 100 may be configured as external devices (e.g., a smartphone) connected by wireless connection.

[0088] The golf club 1 shown in Figure 24 is a modified version of the golf club 1 shown in Figure 23. The vibration sensor 95, vibration device 96, speaker 96A, transmitter 101, and controller 100, which are built into the hosel 4 of the golf club 1 shown in Figure 23, may also be built into the shaft 5. Figure 24 shows an example configuration in which, in addition to the golf club 1 shown in Figure 23, a vibration sensor 95', a vibration device 96', and a speaker 96A' are built into the shaft 5. The vibration sensor, vibration device, speaker, transmitter, and controller may all be built into the shaft 5. In other words, the vibration sensor, vibration device, speaker, transmitter, and controller may be built into either the hosel 4 or the shaft 5, or into both. Alternatively, some of the vibration sensor, vibration device, speaker, transmitter, and controller may be built into one of the hosel 4 and the shaft 5, while the remaining parts are built into the other of the hosel 4 and the shaft 5 (distributed, combined).

[0089] Furthermore, each golf club 1 shown in Figures 23 and 24 may be equipped with a liquid crystal display 102 (display unit, electric display component) (display function). The liquid crystal display 102 is, for example, mounted on the upper side of the head 3 and connected to the output side of the controller 100. In this case, the liquid crystal display 102 can display vibration data detected by vibration sensors 95, 95' as numerical values, graphs, etc. The liquid crystal display 102 may also display the launch direction of the golf ball. In this case, the controller 100 transmits an instruction signal to the indicator (see reference numeral 103 in Figure 33) liquid crystal display 102 to display the launch direction of the golf ball, and controls the liquid crystal display 102 to display the launch direction of the golf ball. The indicator 103 (Figure 33) is an input means for inputting an instruction for the launch direction of the golf ball.

[0090] The display on the liquid crystal display 102 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 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 102. The indicator 103 and controller 100 can also be replaced with a smartphone. In this case, it is preferable to use a wireless connection between the controller 100 and the LCD display 102. Furthermore, the content of the instructions input to the indicator 103 may be input by, for example, the user of the golf club 1, an instructor (trainer), or an assistant (caddy).

[0091] In addition, in each golf club 1 shown in Figures 23 and 24, the mounting positions of the vibration sensor 95, vibration device 96, speaker 96A, transmitter 101, controller 100, vibration sensor 95', vibration device 96', speaker 96A', liquid crystal display 102, vibration device 97, and speaker 97A are not limited to the illustrated examples and may be at any position on the golf club 1.

[0092] <Adapter> Figures 25(A) and (B) are side views illustrating yet another modification of the golf club 1 described above. Figures 25(A) and (B) show a golf club 1 having a crank-shaped hosel 4A (hosel A) as shown in Figure 1(A), but the shape of the hosel 4 is not limited to this. 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, adapter 3A shown in Figure 25(B) is used when it is desired to increase the lie angle L compared to adapter 3B shown in Figure 25(A).

[0093] 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, the examples in Figures 25(A) and (B) can be applied to any of the golf clubs 1 described above, and in that case, it goes without saying that the configuration other than the adapters 3A and 3B and their mounting method will be the same as those in each embodiment and various modified examples.

[0094] [2. Effects] (1) The golf club 1 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 grip 6 is provided at the other end of the shaft 5 and is held by the user. The shaft 5 has a hollow shaft cavity 9 (first cavity) inside, and the grip 6 has a hollow grip cavity 10 (second cavity) inside that communicates with the shaft cavity 9 (first cavity). A vibration transmission member 20 is built into the shaft cavity 9 (first cavity) and the grip cavity 10 (second cavity). The vibration transmission member 20 is formed in an elongated shape, with one end fixed to the hosel 4 and the other end fixed to a grip internal plate 23 and a grip internal fixing member 24 (mounting member) provided inside the grip cavity 10 (second cavity). The vibration transmission member 20 transmits vibrations generated on the striking surface 2 to the grip 6. In this way, by incorporating the vibration transmission member 20 into the shaft 5 and grip 6, vibrations generated at the striking surface 2 of the head 3 can be efficiently transmitted to the grip 6 without attenuation, thereby improving the feel of the shot. Furthermore, the shaft cavity 9 and the grip cavity 10 allow vibrations to resonate, amplifying the sound audible to the user. Therefore, the feel and sound of the shot can be further improved.

[0095] (2) Furthermore, if the hosel 4 in this case is made of a solid material with a rectangular, flat cross-section and a solid interior, as shown in Figure 1(B), then by extending a flat hosel 4B (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. As a result, the vibration is efficiently transmitted to the vibration transmission member 20, allowing the user to feel accurate and delicate vibrations. (3) If the hosel 4 in this case is made of a solid material having two bends in the middle and a solid cross-section, as shown in Figure 1(A), then vibrations from the striking surface 2 are transmitted to the vibration transmission member 20 via the crank-shaped hosel 4A (hosel 4). Therefore, the crank shape improves the vibration transmission efficiency, and vibrations generated on the striking surface 2 of the head 3 can be efficiently transmitted to the grip 6 without attenuation, thus improving the feel of the shot.

[0096] (4), (5) The hosel 4 in this invention may have a hollow hosel cavity 8 (third cavity) formed inside. 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 shot. In this case, the hosel 4 may be crank-shaped with two bends in the middle section, or it may be a rectangular flat plate.

[0097] (6) For example, as shown in Figure 9(B), the mounting member (rack 41, pinion 42, motor 43, winding device 44 in the figure) 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 this 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.

[0098] (7) In the golf club 1 of this invention, the hosel 4 incorporates a vibration sensor 95 that detects vibrations generated on the striking surface 2, thereby enabling the vibrations to be processed electrically in addition to being transmitted by the vibration transmission member 20. For example, by amplifying the vibrations detected by the vibration sensor 95 as sound and outputting it, the user can confirm the vibrations of the striking surface 2 as sound, further improving the feel of the shot. (8) In the golf club 1 of this invention, the hosel 4 incorporates a vibration device 96 that vibrates based on information detected by a vibration sensor, or a speaker 96A that emits sound, thereby increasing the vibration and sound actually transmitted to the user and further improving the feel of the club. (9) By incorporating another vibration device 97 or speaker 97A into the grip 6, the vibration and sound can be amplified closer to the user's hands, further improving the feel of the shot.

[0099] (10) The vibration transmission members 20, 20' in this invention may be composed of a wire, a string, a rod member, a linear elastic member, or any combination thereof. This allows for the realization of the vibration transmission members 20, 20' with a simple configuration, and makes it easy to improve vibration transmission efficiency. Therefore, the feel of the ball can be further improved. (11) 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.

[0100] (12) As shown in Figure 5(A), a mass member 26 that acts as a weight to amplify vibration may be attached to the vibration transmission members 20, 20' in this case. By providing the mass member 26, the vibration of the vibration transmission member 20 can be easily amplified, or the damping of vibration can be suppressed, thereby improving the vibration transmission efficiency. Therefore, the feel when hitting the ball can be further improved. (13), (14) If the hosel 4 in this case has a hollow hosel cavity 8 (third cavity) formed inside, an auxiliary vibration transmission member 20Z may be provided inside the hosel cavity 8 (third cavity), for example as shown in Figure 20(C), to transmit vibrations generated on the striking surface 2 to the vibration transmission member 20. The auxiliary vibration transmission member 20Z allows vibrations generated on the striking surface 2 to be efficiently transmitted to the vibration transmission member 20 without dampening, further improving the feel of the strike.

[0101] (15) The head 3 in this invention may have a head cavity 7 (fourth cavity) inside. 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. (16) As shown in Figures 22(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.

[0102] (17) 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 ball can be further improved.

[0103] (18) As shown in Figures 23 and 24, the golf club 1 in this invention may be equipped with a controller 100 that has a rhythm box function for indicating the rhythm when the golf ball is launched and a synthesized voice generation function. This allows the controller 100 to output one of the rhythm sound and synthesized voice generated when the golf ball is launched from the speaker 96A, thereby providing the user of the golf club 1 with assistance in launching the golf ball. (19) As shown in Figures 25(A) and (B), one of several adapters 3A and 3B is detachably attached to the underside of the head 3 of the golf club 1. 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.

[0104] (20) The golf club 1 in this case may have a transmitter that transmits signals from the vibration sensors 95 and others to an external device. This makes it possible to use the vibration information (vibration data, vibration information) detected by the vibration sensors 95 on external devices (smartphones, computers, data servers, etc.).

[0105] (21)~(26) In the golf club 1 of this invention, if the hosel 4 has a hosel cavity 8 (third cavity) inside, it may have openings 80, 80A, and 80B that communicate the inside of the hosel cavity 8 with the outside. The openings 80, 80A, and 80B allow the reverberating sound inside the hosel cavity 8 to be transmitted to the outside of the hosel 4, thereby increasing the volume of sound audible to the user, further improving the feel of the shot, and allowing the sound of the shot to be fully confirmed. The openings 80, 80A, and 80B described above can be closed with covers 81, 81A, and 81B. In this case, by removing the covers 81, 81A, and 81B, the inside of the hosel 4 (for example, the vibration transmission member 20 inside the hosel 4) can be inspected from the openings 80, 80A, and 80B. In other words, the openings 80, 80A, and 80B also function as covered inspection windows for inspecting the inside of the hosel 4. It can also be said that the covered inspection windows also serve as openings that transmit resonant sounds from inside the hosel cavity 8 to the outside of the hosel 4. This makes it easy to inspect the condition inside the hosel 4.

[0106] (27) The golf club 1 may further have openings 90, 92 that connect the internal space of the shaft cavity 9 (first cavity) or the internal space of the grip cavity 10 (second cavity) to the outside, and covers 91, 93 that close the openings 90, 92. In this case, the openings 90, 92 and the covers 91, 93 form covered inspection windows for the vibration transmission member 20 inside the shaft 5 or grip 6. This allows for easy inspection of the condition of the vibration transmission member 20 inside the shaft 5 or grip 6.

[0107] (28), (29) In the golf club 1 of this invention, by providing multiple vibration transmission members 20, 20', the number of media for transmitting vibrations is increased, making it possible to transmit vibrations from the striking surface 2 to the grip 6 more efficiently. In this case, the multiple vibration transmission members 20, 20' may be attached together to one mounting member, or they may be individually attached to mounting members corresponding to each of the multiple vibration transmission members 20, 20'. (30) For example, multiple sets of racks 41, pinions 42, motors 43, and winding devices 44 may be provided as multiple mounting members corresponding to each of the multiple vibration transmission members 20, 20'. In this case, the position of each of the multiple vibration transmission members 20, 20' can be individually adjusted in the extending direction of the grip 6, and vibrations can be efficiently transmitted to the grip 6. Therefore, the feel of hitting the ball can be further improved. (31), (32) In the golf club 1 of this invention, the other ends of the multiple vibration transmission members 20, 20' are fixed to an upper mounting member 27U (mounting member, grip-side plate) provided inside the grip cavity 10 (second cavity), and one end is fixed to a lower mounting member 27D (mounting member, hosel-side plate). Each of the upper mounting member 27U and the lower mounting member 27D is disc-shaped and extends along a plane intersecting the extending direction of the vibration transmission members 20, 20', and is provided with multiple connecting holes 28U, 28D for connecting each of the multiple vibration transmission members 20, 20'. In this case, multiple vibration transmission members 20, 20' can be attached with a simple configuration.

[0108] [3. Others] 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.

[0109] For example, additional elements such as vibration sensors, vibration devices, speakers, controllers (rhythm box function, synthesized voice generation function), liquid crystal displays, weight members, and adapters can be applied to any of the golf clubs 1 described above. Also, various vibration transmission members 20 can be applied to any of the golf clubs described above. The shapes of the various vibration transmission members 20, as well as various components such as the upper mounting member 27U and lower mounting member 27D, fixing device 22, grip internal fixing device 24, and winding device 44, can be freely combined.

[0110] Furthermore, while a putter was used as an example of a golf club, this principle can of course be applied to other golf clubs as well (woods, hybrids, utilities, etc.). 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.

[0111] If some of the above controller functions (rhythm box function, synthesized voice generation function) are shared with a smartphone, the smartphone's battery will also serve as the battery for the above circuit. 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.

[0112] [II. Second Embodiment] [1. System Configuration] Next, we will explain a golf practice system that applies golf club 1(1′). Figure 26 is an explanatory diagram showing the overall configuration of the golf practice system. This golf practice system S includes a golf practice machine T for putting practice. In golf, putting, as is well known, is the act of using a golf club (typically a "putter") to hit a golf ball into a hole called a cup. The Golf Practice Machine T can be used not only for putting practice with a putter, but also for swing practice with other golf clubs such as drivers and irons.

[0113] The practice machine T includes a cup area T1 equipped with a cup C provided on the golf ball rolling surface, and a hitting area T2 located away from the cup C, which also has a golf ball rolling surface and forms the user's hitting position. The practice machine T is, for example, a practice green, in which case the cup C is recessed into the golf ball rolling surface of the cup area T1. Another example is a golf practice mat. In this case, the cup C is not recessed into the golf ball rolling surface but is provided as a predetermined area (flat surface) on the golf ball rolling surface. Also, in the case of a golf practice mat, the cup C may be formed as a shallow depression on the mat. That is, the cup C is not limited to a hole, but can be any target position for putting the golf ball into the cup. In the following description, we will mainly describe the case where the cup C is a hole recessed into the golf ball rolling surface. The practice machine T is a facility for practicing putting by having a user (golfer) standing in the hitting area T2 use a golf club 1' to hit a ball B towards a cup C located in the cup area T1. The golf ball rolling surface is the surface on which the hit ball B rolls, and is the floor surface of the cup area T1 and the hitting area T2.

[0114] In this embodiment, the directions used to describe the golf practice system S are defined as follows: With the user putting in the hitting area T2 as the reference point, the direction from the user toward the cup C is "forward" (indicated as "F" in the diagram), the opposite side of "forward" is "backward" (indicated as "B" in the diagram), and "left" and "right" (indicated as "L" and "R" in the diagram) are determined based on "forward". In addition, "up" and "down" (indicated as "U" and "D" in the diagram) are determined based on the direction in which gravity acts.

[0115] As shown in Figure 26, the cup C provided in the cup area T1 of the training machine T is positioned in front of the hitting area T2. A pin P made of a rod-shaped member is erected on the cup C. The pin P functions as a marker for the user in the hitting area T2.

[0116] The golf practice system S shown in Figure 26 includes a cup unit 200 attached to the cup C, a pin unit 500 attached to the pin P, a club unit 700 attached to the golf club 1', and a camera unit 600 positioned in the hitting area T2.

[0117] In addition to these units 200, 500, 600, and 700, System S includes a control unit 300 that manages System S as a whole, and a user-owned terminal device 400. Each device 200-700 within System S is connected via a wireless communication network to enable data exchange and can operate in cooperation with each other. The wireless communication network is a network compliant with well-known wireless communication standards such as Wi-Fi and Bluetooth®.

[0118] The outline of this system S is that, based on monitoring information acquired by units 200, 500, 600, and 700, the control unit 300 generates guide information to provide guidance for the user's golf play, the control unit 300 transmits the guide information to terminal devices 400, etc., and the terminal devices 400, etc., provide guidance based on the guide information, for example, in advance before the user takes a shot. In other words, this system S provides interactive guidance for the user's golf practice through the cooperation of each device 200 to 700 via a network. A guide provides users with advice and demonstrations on golf play. Specifically, this could include advice and demonstrations on things like batting form, swing rhythm, ball launch direction, and timing.

[0119] The monitoring information acquired by units 200, 500, 600, and 700 in this system S consists of measurement results related to the user's golf play. The monitoring information includes multiple video data, cup-in information, ball impact information, golf club head angle, etc. The cup unit 200, pin unit 500, club unit 700, and shooting unit 600 are monitor information sources that provide monitor information to the control unit 300.

[0120] <Cup Unit> The cup unit 200 is built into (attached to) cup C and is a mechanism provided to provide monitoring information from cup C to the control unit 300. The cup unit 200 includes a first control device (referred to as "control device" in the figure) 201, a first sensor (first detection means, referred to as "sensor" in the figure) 202, and a first communication device (first transmission device, referred to as "communication device" in the figure) 203. The first control device 201 is an electrical control device comprising a processor, a memory device, and the like, which controls the cup unit 200.

[0121] The first control device 201 is connected to the first sensor 202 and the first communication device 203 so that data can be exchanged between them. The first sensor 202 is a detection means provided to detect cup-in information indicating that golf ball B has gone into cup C. The first sensor 202 is, for example, an impact sensor that detects the impact of a golf ball B that has fallen into cup C.

[0122] The first communication device 203 is a wireless communication device connected to the control unit 300 (external) via a wireless communication network. The cup unit 200 can transmit detection signals (cup-in information) from the first sensor 202 to the control unit 300 (external) via the first communication device 203, and can also receive information from external sources.

[0123] In addition, the cup unit 200 includes additional devices such as a camera 205 for photographing the area around cup C, an acoustic device 206 including an amplifier, speaker, and microphone, a lighting device 207, a laser irradiator 208, and a power supply (not shown) for supplying power. These devices 201 to 208, as well as various devices not shown, may be detachably attached to or integrated with the cup unit 200. Furthermore, sensors such as a speed sensor, acceleration sensor, gyro sensor, magnetic sensor, biometric authentication sensor, barometric pressure sensor, temperature sensor, microphone (sound pressure sensor), orientation sensor, proximity sensor, brightness sensor (ambient light sensor), motion sensor, anemometer, wind vane, infrared sensor, infrared camera, and snow depth gauge (such as a snow depth gauge based on laser reflection or images captured by a camera) may be provided. In other words, cup C can be configured as an "AI cup" with multiple functions, such as automatically detecting when a golf ball B goes into the cup, outputting sound, performing predetermined functions in response to predetermined voice inputs such as "Alexa®", "OK Google®", and "Hey Siri®", emitting light, and individually identifying ball B. When identifying ball B that has fallen into cup C using cup unit 200, it is preferable to brighten the inside of cup C using a light source (lighting means, lighting device 207 in Figure 25) for illuminating the inside of cup C. This improves the identifiability when identifying ball B that has fallen into cup C using the camera 205 of cup unit 200.

[0124] <Pin unit> The pin unit 500 is attached to pin P and is a mechanism provided to provide monitoring information about the area around pin P to the control unit 300. The pin unit 500 includes a second control device (referred to as "control device" in the figure) 501, a first camera (referred to as "camera" in the figure) 502, a second communication device (referred to as "communication device" in the figure) 503, a first irradiator (referred to as "laser" in the figure) 504, and a second light receiver (referred to as "light receiver" in the figure) 505.

[0125] The second control device 501 is an electrical control device that includes a processor and memory device for controlling the pin unit 500. The second control device 501 is connected to the first camera 502, the second communication device 503, the first irradiator 504, and the second photodetector 505 so that data can be exchanged between them.

[0126] The first camera 502 is an image sensor provided to capture images (first image data) of the area around pin P. In this embodiment, the first camera 502 is a shooting means that captures images at least from pin P toward the striking area T2. For example, the first camera 502 may be configured as a "360-degree camera" capable of capturing images in all 360° directions, both vertically and horizontally, centered on pin P. Note that the first camera 502 is not limited to a 360-degree camera, but may be a camera that captures a narrower range than 360 degrees. Furthermore, the first camera 502 may be configured as a 3D camera.

[0127] The second communication device 503 is a wireless communication device connected to the control unit 300 (external) via a wireless communication network. The second communication device 503 can transmit video data captured by the first camera 502 to the control unit 300 (external) and receive information from external sources. The first irradiator 504 is a light source that emits a guide laser beam that shows a straight line from pin P to the striking area T2. The straight line indicates the rolling trajectory of ball B. The trajectory of the laser beam functions as a guide line that shows the trajectory of ball B. Here, the trajectory of ball B is the trajectory connecting cup C to a predetermined striking position. The second light receiver 505 is a light-receiving element (sensing device) for receiving (detecting) guide laser light (guide sub-laser light) from the second irradiator 705, which is located in the club unit 700 described later.

[0128] In addition, the pin unit 500 may be equipped with additional devices such as an acoustic device 506 including an amplifier, speaker, and microphone, a lighting device 507, a power supply (not shown) for supplying power, a laser irradiator, and an automatic operation mechanism for automatically operating various adjustments related to the shooting of the first camera 502 (for example, focusing, brightness adjustment, tracking of the target, switching of the shooting direction, etc.), which may be attached to or integrated with the pin unit 500. Furthermore, the sensor 508 may be equipped with, for example, a speed sensor, acceleration sensor, gyro sensor, magnetic sensor, biometric authentication sensor, barometric pressure sensor, temperature sensor, microphone (sound pressure sensor), direction sensor, proximity sensor, brightness sensor (ambient light sensor), human presence sensor, anemometer, wind direction indicator, infrared sensor, infrared camera, snow depth gauge (snow depth gauge based on laser reflection or images captured by the camera, etc.). In other words, pin P can be configured as a multi-functional "AI pin" that can automatically capture images of the surroundings, output sound, perform predetermined functions in response to predetermined voice inputs such as "Alexa®", "OK Google®", and "Hey Siri®", light up, and individually identify ball B. When identifying ball B that has fallen into cup C using the camera 502 of pin unit 500, it is preferable to brighten the inside of cup C with a light source (illumination means, illumination device 207 in Figure 25) attached to cup unit 200 (cup C) or the illumination device 507 of pin unit 500, as described above. This improves the identifiability when identifying ball B that has fallen into cup C using the first camera 502 or the camera 205 of cup unit 200. Furthermore, for example, in poor visibility conditions or during nighttime golf practice (night golf), the light-emitting function (lighting device 507) attached to the pin unit 500 can be used to improve the visibility of the pin P (in other words, to provide a lighthouse function to the pin P). The lighting provided by the lighting device 507 attached to the pin P can provide, for example, illumination around the pin P, illumination, neon, lights, spotlights, rotating spotlights, mirror balls, LED lighting, etc. The lighting device 507 attached to the pin P lights up, for example, when the motion sensor included in the sensor 508 of the pin unit 500 detects a person approaching the pin P. This lighting function can be switched on and off.

[0129] <Club Unit> The club unit 700 is attached to the golf club 1' and is a mechanism provided to provide monitoring information about the golf club 1's surroundings to the control unit 300. Here, the golf club 1' having the club unit 700 is configured in the same way as the golf club 1 described above with reference to Figures 1 to 25. That is, the golf club 1' has a head 3, a hosel 4, a shaft 5, and a grip, with the grip 6 being integrally formed with the shaft 5, and vibration transmission members 20 being built into the shaft cavity 9 in the shaft 5 and the grip cavity 10 in the grip 6, the lower end of the vibration transmission member 20 being fixed to the hosel 4, and the grip cavity 10 having mounting members (internal grip plate 23 and internal grip fixing device 24) that connect the upper end of the vibration transmission member 20 to the grip 6. Note that the golf club 1' having the club unit 700 can also be a golf club as described later with reference to Figures 27 to 38. The club unit 700 includes a third control device (referred to as "control device" in the figure) 701, a second camera (referred to as "camera" in the figure) 702, a third communication device (referred to as "communication device" in the figure) 703, a second sensor (referred to as "sensor" in the figure) 704, a second irradiator (referred to as "laser" in the figure) 705, a display device (referred to as "display" in the figure) 706, an acoustic device 707, a first light receiver (referred to as "light receiver" in the figure) 708, a lighting device 709, and a vibration sensor 710.

[0130] The third control unit 701 is an electrical control unit comprising a processor, memory device, and other components that control the club unit 700. The third control device 701 is connected to each of the elements 702 to 710 so that data can be exchanged between them. The second camera 702 is an image sensor provided to capture images (second image data) of the area around the golf club 1'. In this embodiment, the second camera 702 is a shooting means that captures images at least from the head of the club 1' toward the front.

[0131] The second sensor 704 is a detection means for detecting impact information related to the impact of a golf ball as one of the monitored pieces of information. The second sensor 704 is, for example, an impact sensor that detects impact data when the golf ball is struck on the impact surface, and an angle sensor that detects the angle of the head when striking the golf ball, and is built into the head 3 [Figure 1(A), etc.]. The vibration sensor 710 is a detection means for detecting vibration information related to the vibration of vibration transmission members 20, 20' (Figure 5(A), etc.) provided on the golf club 1' as one of the monitoring information. The vibration sensor 710 is built into the hosel 4, for example (see reference numeral 95 in Figure 23). The vibration sensor 710 may also be built into the shaft 5 or the grip 6. The second irradiator 705 is a light source that emits a guide laser beam forward from the head of the golf club 1'. The trajectory of the laser beam functions as a guide line indicating the trajectory of ball B. Here, the trajectory of ball B is a trajectory that is approximately perpendicular to the striking surface of the head and extends linearly forward from the striking surface. The display device 706 is a display unit that displays visual information. An example of the display device 706 is an LCD. The sound device 707 is an audio input / output device that includes an amplifier, speaker, and microphone, and reproduces audio signals and inputs audio. The first light receiver 708 is a light-receiving element (sensing device) for receiving (detecting) guide laser light from the first irradiator 504, which is provided on the pin unit 500.

[0132] The third communication device 703 is a wireless communication device connected to the control unit 300 (external) via a wireless communication network. The third communication device 703 can transmit video data captured by the second camera 702 and detection signals from the second sensor 704 to the control unit 300 (external), and can also receive information from external sources.

[0133] In addition, the club unit 700 may be equipped with a lighting device 709, a power supply (not shown), and an automatic operation mechanism for automatically performing various adjustments related to the shooting of the second camera 702 (e.g., focusing, brightness adjustment, tracking of the target, switching of the shooting direction, etc.), which is either detachable from or integrated with the club unit 700. Furthermore, sensors such as a speed sensor, acceleration sensor, gyro sensor, magnetic sensor, biometric authentication sensor, barometric pressure sensor, temperature sensor, microphone (sound pressure sensor), direction sensor, proximity sensor, brightness sensor (ambient light sensor), motion sensor, anemometer, wind direction indicator, infrared sensor, infrared camera, and snow depth gauge (such as a snow depth gauge based on laser reflection or images captured by a camera) may be provided. In other words, the golf club 1' can be configured as an "AI club" with multiple functions, such as automatically capturing images of the surroundings, detecting impact information, emitting laser light, outputting sound, and operating and emitting light in response to voice commands. The lighting provided by the lighting device 709 attached to the golf club 1' provides, for example, illumination, neon, lights, spotlights, rotating spotlights, mirror balls, LED lighting, etc., around the golf club 1'. The lighting device 709 attached to the golf club 1' turns on, for example, when a motion sensor mounted on the golf club 1' detects a person approaching the golf club 1'. This lighting function can be switched on and off.

[0134] <Photography Unit> The shooting unit 600 is attached to the hitting area T2 of the golf practice machine and is a mechanism provided to capture video of the user standing in the hitting area T2 and the surrounding area, and to provide the video data as monitor information to the control unit 300 and other devices within the system S, including the terminal device 400. The imaging unit 600 in Figure 26 includes multiple cameras 602. Specifically, the multiple cameras 602 include a left camera 602L (one of the third imaging means) and a right camera 602R (one of the third imaging means) located on both the left and right sides of the striking area T2, a rear camera 602B (one of the third imaging means) located behind the striking area T2, and a head-mounted head camera 602H (fourth imaging means) worn on the user's head.

[0135] The left and right cameras 602L and 602R and the rear camera 602B are imaging devices that capture images (third image data) of the user from both sides and the rear. The head camera 602H is an imaging device that captures images (fourth image data) of the direction the user is looking while practicing golf. The image data captured by the imaging unit 600 is transmitted via the communication device 601 (fifth transmission device) to devices within system S, such as the control unit 300 and the terminal device 400. The shooting unit 600 includes a control device (not shown) that allows for various adjustments related to the shooting of the camera 602 (for example, focusing, brightness adjustment, tracking of the subject, switching of the shooting direction, etc.).

[0136] <Control Unit> The control unit 300 is a computer that centrally manages the system S. The control unit 300 is installed at any location, such as near the training aircraft T or at a system base located remotely from the training aircraft T. The control unit 300 includes a control device 301, a receiving device (first receiving device, referred to as "receiving device" in the figure) 302, a first transmitting device (fourth transmitting device, referred to as "transmitting device" in the figure) 303, and a storage device 304. The receiving device 302 and the transmitting device 303 are devices for exchanging data with the outside world via a wireless communication network.

[0137] The control unit 300 receives various video data and sensor detection data acquired by each unit 200, 500, 600, and 700 within the system S as monitor information via the receiving device 302. The control device 301 is a device that generates predetermined guide information based on the above-mentioned monitoring information, and is, for example, a processor that implements a software program for generating guide information. The guide information is information that provides the user with guidance for playing golf as described above.

[0138] The storage device 304 is a storage device for storing various types of data. The storage device 304 includes a temporary storage device for temporarily storing received monitor information, as well as a database in which a history of monitor information over a certain period is stored and associated with each user's ID information. The history of monitor information is treated as so-called "big data."

[0139] In addition to monitor information, various other types of information are also stored in the memory device 304. Other types of information stored in the memory device include practice machine information such as the slope and grain of the golf practice machine T on which this system S is used, and personal information such as the user's age, gender, and golf skill level. When generating guide information, the control device 301 may take into account not only the received monitor information but also the history and other information mentioned above. This increases the amount and types of information taken into account when generating guide information, thereby enabling the provision of higher quality guides to the user.

[0140] The transmitting device 303 transmits the guide information generated by the control device 301 to the terminal device 400. Furthermore, the transmitting device 303 may transmit guide information to at least one of the cup unit 200, pin unit 500, club unit 700, and imaging unit 600 (i.e., any device in system S) in addition to or instead of the terminal device 400. Furthermore, various functions of the control unit 300, including the process of generating guide information in the control device 301, may be provided by cloud computing using computing services on a cloud environment (Internet environment).

[0141] <Terminal device> The terminal device 400 is a portable information terminal device that can be carried by the user. The terminal device 400 includes a fourth control device (referred to as "control device" in the figure) 401, a display device 402 (display device, referred to as "display (display) device" in Figure 26), a fourth communication device (second receiving device, referred to as "communication device" in the figure) 403, and an input device 404. The fourth control device 401 is an electrical control device comprising a processor and memory device, etc., which implement a software program for the overall control of the terminal device 400. The fourth communication device 403 is a wireless communication device connected to the control unit 300 (external) via a wireless communication network. Through the fourth communication device 403, it can receive guide information from the control unit 300 and transmit various types of information to external sources.

[0142] The display unit 402 is an example of a presenter that displays (presents) guides based on guide information to the user using some kind of visual image, such as moving images or still images. An example of the display unit 402 is an LCD. The input device 404 is, for example, a touch panel sensor or a button switch.

[0143] Examples of display devices other than the display unit 402 include an acoustic device 405 that outputs sound, a light-emitting illuminator (not shown), and a vibration generating mechanism (not shown) that generates vibration. When an audio device is used as a guide, it presents guidance for golf play using, for example, music, voice, electronic sounds, sound effects, or other sounds. When a lighting device is used as a guide, it displays the guide or support content by flashing lights or changing the color of the light. In the case of a vibration generating mechanism, it presents guidance for golf play through vibration.

[0144] In addition, the terminal device 400 may have various sensors built in. Examples of sensors include gyro sensors, magnetic sensors, GPS, biometric authentication sensors, radar sensors, barometric pressure sensors, temperature and humidity sensors, microphones (sound pressure sensors), compass sensors, proximity sensors, brightness sensors (ambient light sensors), image sensors (camera 406), vital sensors, pulse sensors, body temperature sensors, moisture level sensors, blood pressure sensors, distance sensors, tilt sensors, terrain sensors, motion sensors, anemometers, wind vanes, infrared sensors, infrared cameras, and snow depth gauges (such as snow depth gauges based on laser reflection or images captured by cameras).

[0145] Portable devices used in terminal device 400 include portable information terminal devices such as smartphones and tablet devices, as well as wearable devices that can be worn by the user. In addition, terminal device 400 may also be a well-known golf rangefinder that uses a laser to measure the distance from the user to the target. From the perspective of achieving a balance between golf play and display viewing, it is preferable to use a wearable device for the terminal device 400.

[0146] Examples of wearable devices include smart glasses, eyeglasses-type wearable devices, and smartwatches. Among wearable devices, head-mounted wearable devices such as smart glasses and glasses-type wearable devices are preferable because they allow golfers to view guides and support content without interrupting their golf game. When a head-mounted wearable terminal is used as the terminal device 400, the head camera 602H of the imaging unit 600 is composed of a camera 406 equipped on the head-mounted wearable terminal used as the terminal device 400. In addition, the terminal device 400 may also include an audio device (audio input / output device) 405, including earphones, headphones, microphones, etc. Furthermore, the terminal device 400 can be equipped with an executable application program for performing the functions of the control unit 300 described above (such as the overall management function of system S, the function of generating and providing guide information, etc.). In this case, the terminal device 400 can perform the overall management function of system S, the function of generating and providing guide information, etc., together with or in place of the control unit 300.

[0147] [2. Control] Next, we will describe a specific example of the control that provides guidance in this system S. In the control unit 300, the control device 301 constantly receives as monitoring information video data acquired from the camera 205 of the cup unit 200, the first camera 502 of the pin unit 500, the cameras 602L, 602R, 602B, and 602H of the shooting unit 600, and the second camera 702 of the club unit 700, as well as cup-in information from the first sensor 202 of the cup unit 200, impact information from the impact sensor and angle data from the angle sensor included in the second sensor 704 of the club unit 700, and vibration information from the vibration sensor 710 of the club unit 700.

[0148] The control device 301 stores the received video data, cup-in information, impact information, angle data, and vibration information (monitor information) in a storage device and accumulates them as big data. Based on this monitor information, it also generates guide information to provide guidance to the user during their golf play.

[0149] <Guide presentation> First, let's look at an example of a control that provides guidance on playing golf. The control device 301 analyzes video data acquired using well-known image analysis techniques to calculate estimated play status data. The estimated play status data is data estimated from the video to determine the current play status. The estimated data includes, for example, the user's current position, the user's posture before the swing, head-up analysis, head-up check, the user's eye level, head position, stance, and distance to the pin. Based on the estimated play status data, the control unit 300 can grasp (estimate) the play status based on the monitor information.

[0150] The control device 301 generates guide information based on the calculated estimated play situation data and sample (exemplary play) data. The guide information is advice (guide) to achieve better shots in relation to the current play situation (user's current position, user's posture before the swing, head-up analysis, head-up check, user's eye position, head position, stance, distance to the pin, etc.). Specifically, this involves presenting golf play tips such as exemplary swing path, exemplary form, swing rhythm, ball launch direction, stance, foot width, and accurate impact using illustrations, photographs, videos, audio, rhythm sounds, or text. In addition, the playing forms of masters and experts, such as professional golfers, can also be presented as exemplary play.

[0151] The storage device 304 pre-stores exemplary data that serves as a guide for golf play, as well as various video, image, and audio data for generating guide information. Examples of exemplary data include the user's posture before the swing, the position of the user's eyes, the position of their head, their stance, how to move their body, and the trajectory of the golf club.

[0152] The control device 301 transmits the generated guide information to the terminal device 400. The terminal device 400 outputs golf play guide content based on the guide information from the display 402 and the sound device 405. In addition to the terminal device 400, the destination of the guide information may also be the display device 706 and sound device 707 of the club unit 700, or other units 200, 500, etc.

[0153] Guide content consists of at least one of guide video and guide audio. The guide videos cover aspects such as the user's eye position, head position, posture, head-up analysis, head-up check, hitting form, golf club stroke trajectory, head angle, ball launch angle, head speed, impact strength, swing tempo, grab path (trajectory), and putter face direction (angle). Guide audio may include a metronome sound (including music, voice, and other rhythmic sounds) to guide the swing rhythm of the golf club, and advice (voice comments) to improve golf play. Alternatively, users may connect to interactive online golf lesson services via the internet.

[0154] As a guide for playing golf, you may present predicted outcomes based on the current playing situation. These predicted outcomes may include, for example, the expected ball trajectory, the expected swing path, and the expected form.

[0155] The control device 301 can take into account monitor information accumulated as big data, practice range information such as the slope and grain of the green, and personal information such as the user's age, gender, build, constitution, height, weight, and golf skill level when generating guide information. By taking into account various types of information, the accuracy of the golf play guidance provided by the guide information can be improved. Furthermore, by incorporating the user's golf play history into the guide information, the user's "habits" can be more easily reflected, and personalized golf play guidance can be provided. The control device 301 may also have a function (generation AI) that learns from various collected and accumulated data and automatically generates guide information.

[0156] <Laser light guidance> In this system S, a laser beam (guide laser beam) is projected from the first irradiator 504 of the pin unit 500 toward the hitting area T2. Meanwhile, the club unit 700 of the golf club 1' used by the user in the hitting area T2 is equipped with a first receiver 708. Therefore, when the user stands in the appropriate position relative to the pin unit 500, the first receiver 708 of the club unit 700 receives the laser beam from the first irradiator 504. When the first receiver 708 receives the guide laser beam, a display in the system S indicates this. Examples of displays include the display 402 of the terminal device 400 and the display device 706 of the club unit 700. Alternatively, when the first receiver 708 receives the guide laser beam, the system S may announce this via audio output from a speaker. Speakers within System S include the sound device 405 of terminal device 400, the sound device 206 of cup C, the sound device 506 of pin P, and the sound device 707 of club unit 700.

[0157] Furthermore, a laser beam (guide sub-laser beam) is emitted from the second irradiator 705 of the club unit 700. When the user is standing in the correct position relative to pin P, the laser beam from the second irradiator 705 is directed towards pin P (pin unit 500). On the other hand, the pin unit 500 is equipped with a second receiver 505. Therefore, when the user stands in the correct position relative to the pin unit 500, the second receiver 505 of the pin unit 500 receives the laser beam from the second irradiator 705 of the club unit 700. When the second receiver 505 receives the guide sub-laser beam, a display in the system S indicates this. Examples of displays include the display 402 of the terminal device 400 and the display device 706 of the club unit 700. Alternatively, when the second receiver 505 receives the guide sub-laser beam, the system S may announce this via audio output from a speaker. Speakers within System S include the sound device 405 of terminal device 400, the sound device 206 of cup C, the sound device 506 of pin P, and the sound device 707 of club unit 700.

[0158] As described above, when the first receiver 708 receives the guide laser beam, the display in the system S displays a message to that effect, and when the second receiver 505 receives the guide sub-laser beam, the display in the system S displays a message to that effect. This configuration allows the user to confirm through the display that they are standing in the correct position relative to the pin unit 500. The displayed content can be anything as long as it informs the user that they are standing in the correct position relative to the pin unit 500. The trajectories of the laser beam from the first receiver 708 and the laser beam from the second receiver 505 function as guide lines indicating the trajectory of ball B, allowing the user to stand in the appropriate position relative to the pin unit 500 and understand the launch direction of ball B. Thus, a visual guide regarding putting (hitting ball B) can be provided to the user.

[0159] Furthermore, by using the first irradiator 504 of the pin unit 500 and the second irradiator 705 of the club unit 700, it is possible to provide bidirectional guide light using laser light from the front and laser light from the rear. Bidirectional guide light can provide more reliable guidance. The irradiation angles of the first irradiator 504 of the pin unit 500 and the second irradiator 705 of the club unit 700 can be automatically adjusted based on the analysis results of the monitor information and video data mentioned above. This allows for adjustment of the direction of the laser beam, enabling accurate guidance that reflects the current playing situation.

[0160] <Feedback on the results of the current situation analysis> Furthermore, the control device 301 can provide feedback on the play result after the hit is finished, based on the results of analyzing the video data. In this case, the control device 301 identifies the swing performed by the user in the video based on the results of analyzing the video data, analyzes the identified swing, and tracks the struck golf ball B in the video to analyze the movement of the golf ball B. Here, analyzing and evaluating the swing includes analyzing the user's form and analyzing the movement of the golf club (head).

[0161] Examples of analysis items for user form include the user's eye position, head position, posture, head-up analysis, and head-up check. Examples of analysis items related to the movement of the golf club (head) include the golf club stroke trajectory, head angle, head speed, force of impact, putter face angle, ball launch angle, club path (in-out / out-in movement of the club head at impact), swing tempo, swing flow, and club head movement.

[0162] Examples of analysis items for the movement of golf ball B include the speed of golf ball B, the launch angle (direction) of golf ball B, and the distance golf ball B travels. The control device 301 calculates analysis result data for each of the above items by analyzing the video data, and generates the calculated analysis result data as support information for practice. The analysis results data generated as support information will be used to display the analysis results and evaluations of golf play for each of the above items.

[0163] The control device 301 transmits the analysis result data generated as support information to the terminal device 400. The fourth control device 401 of the terminal device 400 displays the analysis results and evaluations of the golf play for each of the above items on the display device 402 as support content for practice, based on the received analysis result data (support information). In other words, feedback on the results of golf play is provided. Such feedback contributes to improving the user's golf skills. Furthermore, the visualization of one's own play as numerical data and images also contributes to enhancing the enjoyment of golf.

[0164] Examples of golf play analysis results displayed as support content on display unit 402 are listed below. These include the speed of golf ball B, the launch angle (launch direction) of golf ball B, the distance of golf ball B, the spin rate of ball B, the spin direction of ball B, the spin speed, ball quality, spin quality, a video recording of the user's form during the swing, a series of high-speed photographs of the user's form during the swing, the user's eye position, head position, posture during the swing, head-up analysis, head-up check, golf club stroke trajectory, measured head angle, measured head speed, measured impact strength, swing tempo, swing flow, and club head movement. The golf club stroke trajectory includes the so-called grab path. The head angle includes the orientation (angle) of the putter face.

[0165] Feedback on golf play results is not limited to visual feedback as described above; it may also be provided through audio information (i.e., auditory feedback). Auditory feedback specifically refers to communicating the results of a golf play analysis via voice. Specifically, this could include outputting voice messages such as "Nice shot," "Wavy," "Hooked," "Open," "Wavy by n degrees," "Hooked by n degrees," or "Open by n degrees" in response to the user's swing. These voice messages can be combined with the visual feedback mentioned above.

[0166] In this case, the storage device 304 of the control unit 300 is provided with a database that stores various audio data used for auditory feedback. The control device 301 extracts audio data to be provided to the user from the database based on the various analysis result data calculated, and generates practice support information that includes this audio data. The terminal device 400 outputs audio based on the transmitted audio data. Headphones or earphones can be used for audio output, for example. However, audio output is not limited to the terminal device 400; any audio device within the system S may also perform the audio output.

[0167] <Banner Ad> The control device 301 may generate banner advertisement display information in conjunction with providing the above-mentioned guide information and feedback on golf play results, and transmit it to the user's terminal device 400.

[0168] Banner ad display information is information for displaying banner ad videos (small advertisements displayed on a portion of the screen). In this case, the terminal device 400 displays banner ads in conjunction with the provision of guide information and feedback on golf play results. The banner advertisement may be displayed on any display device within the system S, in addition to the terminal device 400. The control device 301 may generate advertising audio output information in place of, or in addition to, the banner advertising information and transmit it to the user's terminal device 400. In this case, the terminal device 400 outputs the advertising audio along with the feedback on the golf play results. The output video and audio content is not limited to advertisements; it can be any video or audio (such as ASMR).

[0169] Furthermore, the content provided by this system S from the control unit 300 to the terminal device 400 and other devices 200, 500, and 700 is not limited to the above. For example, the following may be provided: audio or video announcements for "prize giveaways," advertising videos, advertising audio, point rewards at shops and websites, miles, mileage, stay mileage, discount tickets, service vouchers, music, support audio, lighting effects, etc.

[0170] In this case, the storage device 304 of the control unit 300 is equipped with a database that stores a large amount of information (including advertising video signals) related to advertising videos, advertising audio, point accrual at shops and websites, music, support audio, and lighting effects. For example, depending on whether a ball is put in the cup, the control unit 300 extracts information related to advertising videos, advertising audio, point accrual at shops and websites, miles, mileage, stay mileage, discount tickets, service vouchers, music, support audio, and lighting effects from the database and transmits it to the terminal device 400. Support audio refers to sounds that enhance the enjoyment of golf, and specifically includes cheers, applause, and shouts from the gallery. Lighting effects are effects that enhance the user's enjoyment of golf by controlling the on / off, color, and brightness of light sources within the system S. Lighting can include illuminations, neon lights, spotlights, rotating spotlights, mirror balls, LED lighting, etc. Lighting effects may be accompanied by music playback. Users can select their desired music genre and songs, such as disco, club music, classical music, popular songs, and enka. For lighting effects, it is recommended to change the control of the light source according to the selected music genre.

[0171] The timing of providing banner ads, advertising audio, music, etc., is not limited to when a ball is put in the cup. Advertising videos, advertising audio, music, radio broadcasts, movies, etc., can be provided at any time while practicing with the practice machine T. The provision of "music" mentioned above includes playing music based on playlists of desired genres or songs created by the user, or playing music selected by a DJ (disc jockey). Regarding the DJ's selection, the user may request their desired songs. The music provided may also be so-called "karaoke." In this case, the user can sing along to the karaoke performance. Users can arbitrarily switch on and off the playback of audio and video content such as advertising videos, advertising audio, music, radio broadcasts, movies, television, and video streaming services. In other words, whether or not the various contents mentioned above are provided can be individually selected by the user from, for example, the terminal device 400.

[0172] In addition, the terminal device 400 may provide features such as competitive games linked to the acquired monitor information, putting games, and approach games. If the user's terminal device 400 is a wearable device worn on the head, such as smart glasses or glasses-type wearable devices (head-mounted wearable device), the various guide displays and support content images mentioned above are superimposed on the real world and displayed on the display unit 402 of the terminal device 400. By providing guide displays and support content as AR (Augmented Reality), VR (Virtual Reality), or MR (Mixed Reality) in this way, the user's enjoyment of playing golf can be further enhanced.

[0173] If the user's terminal device 400 is a wearable device worn on the head, such as smart glasses or glasses-type wearable devices (head-mounted wearable device), the user can use the display 402 of the terminal device 400 to play audio and video such as advertising videos, advertising audio, music, radio broadcasts, and movies, as well as browse websites and view various file documents while playing golf or moving between courses. In other words, the user can have auditory and visual experiences or perform auditory and visual tasks unrelated to golf while playing golf. The user can select the various guides and support content mentioned above from the terminal device 400 as appropriate and receive support content in their desired combination.

[0174] Furthermore, the analysis results of the video data and the generated support information may be stored as big data in the storage device of the control device 301 (control unit 300). By storing the analysis results of the video data and the generated support information as big data in the control unit 300, a data spreadsheet containing golf play information can be provided. This big data can be mutually utilized by multiple golf practice machines.

[0175] In the golf practice system S shown in Figure 26, a user display (monitor) 1M is installed in the hitting area T2. This monitor 1M is an example of a display device for showing various information and is installed near the user. The monitor 1M is equipped with a control device 901, a display device 902, a communication device 903, an input device 904, an acoustic device 905, a camera 906, a sensor 907, a lighting device 908, etc. As sensors, for example, a speed sensor, an acceleration sensor, a gyroscope, a magnetic sensor, a biometric authentication sensor, a barometric pressure sensor, a temperature sensor, a microphone (sound pressure sensor), a compass sensor, a proximity sensor, a brightness sensor (ambient light sensor), a motion sensor, an anemometer, a wind vane, an infrared sensor, an infrared camera, a snow depth gauge (such as a snow depth gauge based on laser reflection or images captured by a camera), etc. In other words, Monitor 1M functions as one of the devices within the training system S, and can be configured as a multi-functional AI device that can cooperate with other devices within the system S, display various information to the user, output sound, perform predetermined functions in response to predetermined voice inputs such as "Alexa®", "OK Google®", and "Hey Siri®", and also emit light.

[0176] Monitor 1M may display various guides, support content, video and still images of the user's form, as well as weather, current events, the user's score, and ranking. Monitor 1M allows the user to easily check the visual information provided by System S. In addition, Monitor 1M functions as an element within the golf practice system S in conjunction with other devices within System S. For example, the user may use Monitor 1M to connect to an interactive online golf lesson service via the internet.

[0177] Furthermore, an electronic display board 800 (showing device) may be installed at any location within the golf practice system S (for example, behind the cup area T1). The electronic display board 800 is an example of a showing device for displaying various information within the golf practice system S, and from the viewpoint of ensuring visibility, it is preferably a large display device. However, the size of the electronic display board 800 is not particularly limited. The electronic display board 800 may be configured as an information terminal device equipped with attached mechanisms such as a control device 801, a display device 802, a communication device 803, an input device 804, an acoustic device 805, a camera 806, a sensor 807, and a lighting device 808, and can function as one of the devices that make up the system S.

[0178] Sensors 807 may include, for example, a speed sensor, acceleration sensor, gyroscope, magnetic sensor, biometric authentication sensor, barometric pressure sensor, temperature sensor, microphone (sound pressure sensor), compass sensor, proximity sensor, brightness sensor (ambient light sensor), motion sensor, anemometer, wind vane, infrared sensor, infrared camera, snow depth gauge (such as a snow depth gauge based on laser reflection or images captured by a camera). In other words, the electronic display board 800 functions as one of the devices in the training system S and can be configured as a multi-functional AI device that can cooperate with other devices in the training system S, display various information to the user, output sound, perform predetermined functions or light up in response to predetermined voice inputs such as "Alexa®", "OK Google®", and "Hey Siri®".

[0179] The display of various information on the electronic display board 800 is controlled, for example, by the control unit 300. The electronic display board 800 may be controlled not only by the control unit 300, but also by any of the cup unit 200, control unit 300, terminal device 400, pin unit 500, shooting unit 600, or club unit 700 within the system S. The electronic display board 800 may display the various guides and support content described above. In addition to the guides and content described above, any information such as weather, current events, user scores, and rankings may be displayed on the electronic display board 800. Alternatively, a projector may be provided instead of, or in addition to, the electronic display board 800. The projector can project images using projection mapping into the system S.

[0180] All cameras installed within the golf practice system S may be composed of 3D cameras. Furthermore, each device within the golf practice system S may be configured to share its respective power status (e.g., battery level) and operating status (instruments). Furthermore, since the shooting unit 600 is positioned to surround the user standing in the hitting area T2, the shooting unit 600 can capture a full-body (all-around) image of the user. This image information can be used to obtain measurement data for custom-made golf wear, golf caps, golf shoes, golf clubs, and other clothing, accessories, and equipment. This image information can also be used to create icons, avatars, and characters (two-dimensional characters, three-dimensional characters) for use on social networking services (SNS) and other online platforms. The created avatars can be used in a three-dimensional virtual space constructed on a computer, such as a metaverse.

[0181] [3. Effects and Benefits] The golf practice system S of this embodiment has the above-described configuration and therefore produces the following effects.

[0182] (1) According to this system S, at least one of the following is acquired as monitor information: cup-in information from the first sensor 202 of the cup unit 200, video data captured by the first camera 502 of the pin unit 500 from the pin P toward the hitting area T2 (rear), video data captured by the second camera 702 of the club unit 700 from the head toward the front, impact data and head angle data detected by the second sensor 704 of the club unit 700, and vibration information detected by the vibration sensor of the club unit 700. The control unit 300 grasps the current playing situation based on the monitor information and generates guide information to provide guidance to the user's golf play according to the playing situation. The terminal device 400 provides the user with guidance according to the guide information in advance before the user makes a shot. The training machine T provides guidance based on monitor information obtained from multiple monitor information sources (cup unit 200, pin unit 500, club unit 700) positioned in front (cup C side) and behind (hitting area T2 side). The monitor information includes multiple types, such as video data, hitting information, vibration information, and cup-in information. Therefore, a highly accurate guide that takes into account numerous factors is provided, thereby enhancing the effectiveness of practice. Here, since the monitoring information includes vibration information related to the vibration transmission member 20, it becomes possible to provide guidance based on vibration information. For example, the correlation between vibration information and impact information (other monitoring information) (e.g., the relationship between vibration and the quality of the impact) can be analyzed and the analysis results can be presented, or these analysis results can be accumulated and fed back to the user. In addition, vibration information can be visualized (made visible) using numerical values ​​or graphs, or vibration information can be accumulated as big data. Furthermore, by using the first irradiator 504 of the pin unit 500 and the second irradiator 705 of the club unit 700, it is possible to present guide light in both directions using laser light from the front and laser light from the rear. Therefore, compared to a structure that irradiates guide light in one direction from the golf club, more accurate guidance is possible.

[0183] [III. Others] The following are variations of the golf clubs 1,1' used in each of the above embodiments. The golf club 1 shown in Figure 5(A) above is an example where one mass member 26 is attached to the vibration transmission member 20. However, as shown in Figure 27(A), for example, golf clubs 1 and 1' may have multiple mass members 26 attached to the vibration transmission member 20.

[0184] In the golf clubs 1 and 1', the hosel 4 may be fitted with various electrical devices such as a pickup to detect vibrations, an amplifier to amplify vibrations, a speaker and microphone to convert vibrations into audio signals and output them, an actuator to electrically vibrate the vibration transmission member 20, a communication device, and a battery. The specific mounting locations of these electrical devices are not particularly limited and they may be mounted anywhere on the golf clubs 1 and 1'. For example, as shown in Figure 27(B), the electrical devices 4E may be mounted on the upper end portion 4U of the hosel 4 of the golf club 1. The electrical devices 4E are not limited to this location and may also be provided on the shaft 5 or the grip 6.

[0185] Furthermore, as shown in Figure 28(A), a speaker 21S may be built into the upper end of the grip 6, facing upwards, instead of the grip upper end plate 21 (grip end). In this case, since the sound outlet of the speaker 21S faces upwards, it becomes easier to transmit sound to the user. Furthermore, as shown in Figure 28(B), the upper end of the grip 6 forms an opening 21Z that connects the grip cavity 10 to the outside, and the inner circumference shape of the grip cavity 10 including the opening 21Z may be formed into a horn shape that can emphasize (reverberate) sound. In this case, the opening 21Z becomes the sound emission port for the sound of the ball being struck, making it easier to transmit sound to the user. In addition, sound from a speaker built into the golf club (not shown in Figure 28(B)) may be output from the opening 21Z. Furthermore, sound collected by a microphone (pickup) (not shown in Figure 28(B)) may be output from the speaker built into the golf club via the opening 21Z. Golf clubs 1,1' having a microphone (pickup), a speaker, and an opening 21Z can be said to be equipped with a loudspeaker function.

[0186] Furthermore, if the upper end of the grip 6 forms an opening 21Z as shown in Figure 28(B) above, it is advisable to close the opening 21Z with a mesh-like cap 21X, for example, as shown in Figure 28(C). This ensures sound emission from the opening 21Z and prevents foreign matter from entering the inside of the grip 6. The mesh-like cap 21X can be made from any material, such as cloth or plastic. As shown in Figure 28(D), a detachable cap 21Y may be used as the cap to close the opening 21Z. The detachable cap 21Y can be attached using any known method, such as a screw type or a snap-in type. Providing a detachable cap 21Y makes it easier to inspect and maintain the inside of the golf club 1.

[0187] Furthermore, as shown in Figure 28(E), the motor 43 and winding device 44 may be incorporated into the detachable cap 21W. With this detachable cap 21W, the motor 43 and winding device 44 can be attached and detached together with the cap 21W, making inspection and maintenance work on the motor 43 and winding device 44 easier. Furthermore, in addition, the golf club 1,1' may have a hosel 4 and shaft 5 that are detachably attached, a shaft 5 and grip 6 that are detachably attached, or a head 3 and hosel 4 that are detachably attached. In other words, in the golf club 1,1', the head 3, hosel 4, shaft 5, and grip 6 may be detachable.

[0188] As shown in Figure 29(A), a tuning fork-shaped sound-producing element 20S may be attached to the golf clubs 1,1' instead of the vibration-transmitting member 20. In this case, the golf clubs 1,1' have a head 3, a hosel 4, a shaft 5, and a grip, with the grip 6 being integrally formed with the shaft 5, the vibration-transmitting member 20 being built into the shaft cavity 9 in the shaft 5 and the grip cavity 10 in the grip 6, and the lower end of the vibration-transmitting member 20 being fixed to the hosel 4. The tuning fork-shaped sound-producing element 20S is a component with a tuning fork shape, where the upper part is split into two (U-shaped) parts, and is formed as a sound-producing element that emits sound through vibration. The lower end (one end) of this tuning fork-shaped sound-producing element 20S is fixed to the hosel 4A (hosel 4) via a fixing device 22, and is housed in the shaft cavity 9. The tuning fork-shaped sound-producing element 20S is set to be shorter than the axial dimension of the shaft 5, and its upper end is not fixed to the shaft 5 or the grip 6. In this golf club 1,1', when the golf ball is struck by the striking surface 2 of the head 3, the impact and vibration are transmitted through the head 3 and hosel 4 to the tuning fork-shaped sound-producing element 20S. The impact and vibration cause the tuning fork-shaped sound-producing element 20S to vibrate and produce sound. As a result, the user can hear the sound associated with the impact. Therefore, the feel and sound of the impact can be improved.

[0189] The golf clubs 1 and 1' shown in Figure 29(B) differ from the golf clubs 1 and 1' shown in Figure 29(A) in that the hosel 4A has a hosel cavity 8, but are otherwise the same. In this case, the tuning fork-shaped sound-producing element 20S is fixed to the inner circumferential surface of the hosel cavity 8 via a fixing device 22. The golf clubs 1 and 1' shown in Figure 29(B) produce the same effect as the golf clubs 1 and 1' shown in Figure 29(A).

[0190] The golf clubs 1 and 1' shown in Figure 29(C) differ from the golf clubs 1 and 1' shown in Figure 29(A) in that string-like vibration transmission members 20 and 20' are connected to the upper end of the tuning fork-shaped sound-producing body 20S, and the upper ends of the vibration transmission members 20 and 20' are attached to the winding device 44. Otherwise, they are the same. In this case, in addition to the tuning fork-shaped sound-producing body 20S vibrating and producing sound, the vibrations are transmitted to the grip 6 by the vibration transmission members 20 and 20' to improve the feel of the shot, and the position can be adjusted with the winding device 44 to further improve the feel of the shot.

[0191] The golf clubs 1 and 1' shown in Figure 29(D) differ from those shown in Figure 29(B) in that the hosel 4 has an opening 8X that connects the hosel cavity 8 to the outside, allowing the tuning fork-shaped sound-producing element 20S to be inserted into and removed from the hosel cavity 8 and shaft cavity 9 through the opening 8X. Otherwise, they are the same. The opening 8X can be closed with a cover 8Y. In this case, the opening 8X becomes an insertion / removal port for inserting and removing the tuning fork-shaped sound-producing element 20S into and out of the hosel cavity 8 and shaft cavity 9. Therefore, the attachment and removal of the tuning fork-shaped sound-producing element 20S to and from the golf clubs 1 and 1' is easy. The tuning fork-shaped sound-producing element 20S may be mounted separately from the opening 8X within the hosel cavity 8 and the shaft cavity 9, or it may be mounted integrally with the opening 8X within the hosel cavity 8 and the shaft cavity 9. The statement that the tuning fork-shaped sound-producing body 20S and the opening 8X are separate means that the lower end (and fixing device 22) of the tuning fork-shaped sound-producing body 20S is not attached to the opening 8X, and the tuning fork-shaped sound-producing body 20S can be attached to and detached from the golf club 1,1' separately from the opening 8X. The statement that the tuning fork-shaped sound-producing body 20S is integrated with the opening 8X means that the lower end of the tuning fork-shaped sound-producing body 20S is attached to the opening 8X via a fixing device 22, and the tuning fork-shaped sound-producing body 20S is detachable from the golf club 1,1' together with the opening 8X (it is a retractable type).

[0192] The tuning fork-shaped sound-producing element 20S may be positioned so as to be separated from the inner circumferential surface of the shaft cavity 9, or it may be positioned so as to be in contact with the inner circumferential surface of the shaft cavity 9. When the tuning fork-shaped sound-producing element 20S is separated from the inner circumferential surface of the shaft cavity 9, the vibration of the tuning fork-shaped sound-producing element 20S is less attenuated and the sound becomes louder compared to when it is in contact with the shaft cavity 9. When the tuning fork-shaped sound-producing element 20S is in contact with the inner circumferential surface of the shaft cavity 9, the vibration of the tuning fork-shaped sound-producing element 20S is transmitted to the shaft 5, thereby strengthening the vibration transmitted to the grip 6. Furthermore, the orientation in which the tuning fork-shaped sound-producing element 20S is attached is not limited to the illustrated example; it may be in any orientation. For example, in Figures 29(A) and 29(B), the tuning fork-shaped sound-producing element 20S is installed with two U-shaped rods aligned in the front-to-back direction, but it may also be installed with the two U-shaped rods aligned along a plane extending parallel to the striking surface 2. The orientation in which the tuning fork-shaped sound-producing element 20S is attached may be freely adjusted and changed by the user.

[0193] The tuning fork-shaped sound-producing element 20S may be combined with other vibration transmission members, as shown in Figures 30(A) and (B). In Figure 30(A), a coil spring-shaped spring member 20S' is connected to the lower end of the tuning fork-shaped sound-producing element 20S and fixed to the fixing device 22 via the spring member 20S'. In Figure 30(B), the spring member 20S' and a rod-shaped rod member 20S''' are connected to the lower end of the tuning fork-shaped sound-producing element 20S and fixed to the fixing device 22 via the spring member 20S' and the rod-shaped rod member 20S''. The spring member 20S' and the rod member 20S'' function as vibration transmission members that transmit vibrations generated in the head 3 to the tuning fork-shaped sound-producing element 20S, or transmit vibrations from the tuning fork-shaped sound-producing element 20S to the golf club 1. In a structure combining the tuning fork-shaped sound-producing element 20S and a vibration transmission member, the length ratio of the tuning fork-shaped sound-producing element 20S to the other members is flexible.

[0194] Furthermore, as shown in Figure 30(C), the tuning fork-shaped sound-producing body 20S may be formed from a straight, rod-shaped member whose upper portion is not divided into two (U-shaped) parts. As shown in Figure 30(D), a string-shaped vibration transmission member 20 is connected to the upper end of a rod-shaped tuning fork-shaped sound-producing body 20S, and the upper end of the vibration transmission member 20 may be attached to a winding device 44. The tuning fork-shaped sound-producing element 20S is not limited to a rod shape; it can be any shape, such as a strip, chain, mesh, or net. Furthermore, a mechanism may be provided to detect the vibration of the tuning fork-shaped sound-producing element 20S and electrically amplify it to produce sound. A specific example of this mechanism is a structure in which the tuning fork-shaped sound-producing element 20S is formed in a net-like structure by weaving string-like metal (conductive) material into a net, and a pickup coil positioned close to the tuning fork-shaped sound-producing element 20S converts its vibration into an electrical signal, which is then amplified by an amplifier to produce sound. Of course, a golf club equipped with a tuning fork-shaped sound-producing element 20S may be applied to the golf practice system S shown in Figure 26.

[0195] The golf clubs 1 and 1' shown in Figure 31(A) are detachably fitted with a detachable unit 70 for detachably attaching a vibration transmission member 20. The golf clubs 1 and 1' to which this detachable unit 70 is fitted have a head 3, a hosel 4, a shaft 5, and a grip, and have a shaft cavity 9 inside the shaft 5 and a grip cavity 10 inside the grip 6. The detachable unit 70 has a main body portion 70A that is built into the shaft cavity portion 9 and the grip cavity portion 10. The main body portion 70A extends in the direction in which the shaft 5 extends (axial direction) and is a cylindrical member that conforms to the inner circumference shape of the shaft cavity portion 9 and the grip cavity portion 10. The main body portion 70A of the detachable unit 70 has its lower end (one end) fixed to the hosel 4 and its upper end (the other end) fixed to the grip upper end plate 21 inside the grip 6. A hollow portion 70B is provided inside the main body portion 70A. The vibration transmission member 20 (shown by a dashed line in the figure) is housed in this hollow portion 70B.

[0196] Within the hollow section 70B, the lower and upper ends of the vibration transmission member 20 are fixed to the main body section 70A. The lower end of the vibration transmission member 20 is fixed to the lower end of the main body section 70A. Specifically, the lower end of the vibration transmission member 20 may be fixed directly to the bottom surface of the main body section 70A on the inner circumferential surface of the hollow section 70B, or indirectly via a fixing device 22 (not shown). In other words, the lower end of the vibration transmission member 20 provided within the hollow section 70B of the detachable unit 70 can be said to be fixed to the hosel 4 via the main body section 70A. Therefore, vibrations caused by the impact of the golf ball are transmitted to the vibration transmission member 20 inside the detachable unit 70 through the hosel 4. The lower end of the main body section 70A may be positioned above the hosel 4 and supported on the inner circumferential surface of the shaft 5 by a support means such as an engaging projection. In that case, vibrations caused by the impact of the golf ball are transmitted to the vibration transmission member 20 inside the detachable unit 70 through the hosel 4 and the shaft 5. The upper end of the vibration transmission member 20 may be directly fixed to the upper end of the main body 70A, or it may be indirectly fixed via any mounting member such as a plate member or a winding device. Figure 31(A) shows an example where the upper end of the vibration transmission member 20 is attached to the winding device 44. Although not shown, in addition to the winding device 44, a motor, rack, and pinion are also built into the main body 70A.

[0197] The detachable unit 70 can be described as a housing that incorporates the vibration transmission member 20 and its fixing device. The shape of the main body 70A of the detachable unit 70 is cylindrical, following the inner circumference shape of the shaft cavity 9 and the grip cavity 10, and can be any shape as long as a hollow part 70B is formed inside. As an example, as shown in Figure 31(B), the main body 70A forms a framework structure combining a plurality of vertical beams 70V extending along the axial direction of the shaft 5 and a plurality of horizontal beams 70H along the axial cross-section. Each vertical beam 70V is arranged spaced apart from each other between its upper end 70U and lower end 70D. Each horizontal beam 70H is arranged perpendicular to each vertical beam 70V. Each vertical beam 70V and each horizontal beam 70H form a lattice-like framework structure.

[0198] In this case, the main body 70A (detachable unit 70) also functions as a reinforcing member that strengthens the shaft 5 from the inner circumferential surface side. By reinforcing the strength of the shaft 5 with the main body 70A (detachable unit 70), the thickness of the circumferential surface of the shaft 5 (the circumferential surface surrounding the shaft cavity 9) can be reduced. As a result, the shaft 5 becomes more permeable to vibration transmission, thereby strengthening the vibration transmitted to the grip 6. As a modified example of the main body 70A (detachable unit 70) shown in Figure 31(B), the horizontal beam 70H may be omitted and the main body 70A may be constructed with one or more vertical beams 70V. The shape of the main body 70A is not limited to the frame structure described above; it may also be a cylindrical structure surrounded by walls. Furthermore, it is not limited to a cylindrical shape; it may also be a rectangular tube.

[0199] The detachable unit (detachable unit for the tuning fork-type sound-producing element) 71 shown in Figure 31(C) has a tuning fork-type sound-producing element 20S built into the hollow part 71B of the main body 71A, and differs from the detachable unit 70 in Figure 31(A) in that the main body 71A is located inside the shaft cavity 9, but the other configurations are the same. The detachable unit 71 has a shorter extension direction (axial direction, vertical direction) compared to the detachable unit 70 in Figure 31(A). The extension direction dimension of the detachable unit 71 is set to correspond to the extension direction dimension of the tuning fork-type sound-producing body 20S. In other words, the detachable unit 71 only needs to be able to accommodate the tuning fork-shaped sound-producing element 20S, and is therefore built into at least the shaft cavity 9. In contrast, the detachable unit 70 [Figure 31(A)] extends from the shaft cavity 9 to the grip cavity 10 in order to transmit vibrations to the grip 6 via the vibration transmission member 20. A golf club equipped with the detachable unit 71 may have a shaft cavity 9 inside the shaft 5, or in other words, it may or may not have a grip cavity 10 inside the grip 6. Furthermore, if a grip cavity 10 is provided inside the grip 6, the detachable unit 71 may extend into the grip cavity 10, as shown by the dashed line in Figure 31(C).

[0200] The detachable units 70 and 71 shown in FIGS. 31(A) to (C) are cylindrical along the inner peripheral shape of the shaft cavity 9 (and the grip cavity 10), and can be said to be of a cartridge type that is inserted into and removed from the shaft cavity 9 (and the grip cavity 10). In this case, the golf clubs 1 and 1' can be said to have a double structure incorporating the detachable units 70 and 71. FIGS. 31(D) and (E) are modified examples of the shape of the detachable units 70 and 71. The shape of the detachable unit 70 shown in FIG. 31(D) is a capsule type with substantially hemispherical upper and lower ends. The shape of the detachable unit 70 shown in FIG. 31(E) is a modified example of the capsule type, and is a capsule type with a curved surface shape where the lower end (one end) is thicker than the upper end (the other end).

[0201] The detachable units 70 and 71 shown in FIGS. 31(A) to (E) may be detachably attached in a state where their lower ends are in contact with the hosel 4, or may be incorporated in the shaft cavity 9 (and the grip cavity 10) in a state separated above the hosel 4. The upper ends of the detachable units 70 and 71 shown in FIGS. 31(A) to (E) may be incorporated in the grip cavity 10 or may be incorporated in the shaft cavity 9. The position of the upper ends of the detachable units 70 and 71 may be located at the upper ends of the grip cavity 10 or the shaft cavity 9, or may be separated below the upper ends of the grip cavity 10 or the shaft cavity 9. Also, as shown in FIG. 31(F), when a hosel cavity 8 is provided inside the hosel 4, the detachable units 70 and 71 may extend into the hosel cavity 8.

[0202] The outer peripheral surface of the detachable units 70 and 71 may or may not be in contact with the inner peripheral surface of the shaft cavity 9 (and the grip cavity 10). When the outer peripheral surface of the detachable units 70 and 71 is not in contact with the inner peripheral surface of the shaft cavity 9 (and the grip cavity 10), for example, a resin ring may be provided on the outer peripheral surface of the detachable units 70 and 71 to fill the gap with the inner peripheral surface of the shaft cavity 9 (and the grip cavity 10). The attachment / detachment units 70 and 71 may incorporate various electrical devices 72 such as pickups, amplifiers, speakers, microphones, actuators, communication devices, batteries, motors, and vibration devices (actuators). Of course, a golf club provided with the attachment / detachment units 70 and 71 may be applied to the golf practice system S shown in FIG. 26. Also, in the various embodiments and modifications described above, the vibration transmission member 20 may be formed of a conductive member. In this case, electrical signals and power can be transmitted to various electrical devices such as pickups, amplifiers, speakers, microphones, actuators, communication devices, batteries, and motors through the vibration transmission member 20. In addition, in each of the above embodiments and modifications, the shapes (neck shapes) of the hosel 4 and the shaft 5 are not limited to those described above, and well-known shapes such as straight necks, goose necks, and crank necks can be freely applied. Also, in each of the above embodiments and modifications, the golf club is not limited to a putter, and may be of any type such as an iron or a driver.

[0203] In the golf clubs 1 and 1' of each of the above embodiments and modifications, the shape of the grip member 6 is not limited to the shape shown in the drawing, and may be any shape. Also, in the golf clubs 1 and 1', the shaft 5 and the grip 6 may be integrally formed. In this case, as shown in FIG. 32(A), the diameters of the shaft 5 and the grip 6 may be set to be the same. Also, the golf clubs 1 and 1' shown in FIG. 32(B) have the same diameters of the shaft 5 and the grip 6 as those shown in FIG. 32(A), and a grip member 6G that covers the periphery of the grip 6 is provided on the grip 6. Also, as shown in FIG. 32(C), the diameter of the grip 6 portion may be set to be larger than the diameter of the shaft 5. In this case, the grip 6 is easier to hold.

[0204] The material used for the grip member 6G is one that is soft and conforms well to the user's hand. Specifically, this includes rubber (natural rubber), elastomer (resin material), fiber-reinforced plastic (FRP), ultrafine resin fibers, and metal. In Figure 32(B), the grip member 6G is clearly shown in comparison to Figure 32(A), but the grip member 6G may be provided on the grip 6 of the golf club 1 according to each of the embodiments and modifications described above. As a grip member 6G using resin fibers such as fiber-reinforced plastic (FRP) or ultrafine resin fibers, a net-like (mesh-like) net member (mesh member) made of resin fibers such as fiber-reinforced plastic or ultrafine resin fibers can be applied. A specific example of a mesh member using fiber-reinforced plastic or ultrafine resin fibers is a mesh member made by weaving strings made of fiber-reinforced plastic into a flat net-like (mesh-like) structure. Another specific example is a mesh member made by intertwining ultrafine resin fibers in a three-dimensional structure. A sheet-like cover may also be provided around the net member (mesh member). In a golf club 1 having a grip member 6G made of a mesh member, vibrations from the shaft 5 tend to be easily transmitted to the user's hand through the grip member 6G. Therefore, the feel of the shot can be improved. In other words, the grip member 6G is provided on the grip 6 in a golf club that comprises a shaft 5 formed in an axial shape, a head 3 provided on one end of the shaft 5 and having a striking surface 2 for striking a golf ball, and a grip 6 provided on the other end of the shaft 5 and held by the user. Here, the golf clubs 1,1' equipped with the grip member 6G have a head 3, a hosel 4, a shaft 5, and a grip, with the grip 6 being integrally formed with the shaft 5, a vibration transmission member 20 being built into the shaft cavity 9 in the shaft 5 and the grip cavity 10 in the grip 6, the lower end of the vibration transmission member 20 being fixed to the hosel 4, and of course having mounting members (internal grip plate 23 and internal grip fixing device 24) inside the grip cavity 10 that connect the upper end of the vibration transmission member 20 to the grip 6. In that case, vibrations from striking the golf ball are transmitted to the grip 6 via the vibration transmission member 20, and these vibrations are more easily transmitted to the user's hand through the grip member 6G. Therefore, the feel of the shot can be further improved.

[0205] Furthermore, the material used for grip 6 may be rubber (natural rubber), elastomer (resin material), fiber-reinforced plastic (FRP), ultrafine resin fibers, metal, etc. These materials are merely examples, and the materials used for grip 6 and grip component 6G are not limited to these. Of course, a golf club equipped with grip component 6G may also be applied to the golf practice system S. The materials used for each part of the golf club 1,1′ (head 3, hosel 4, shaft 5, grip 6) may be any material, including various metals such as stainless steel, titanium, soft iron, bronze, aluminum, aluminum alloy, aluminum, and copper, as well as carbon, plastic, nanocellulose, carbon nanofiber, Japanese paper, leather, polyacetal, PET, glass, aluminum fiber, chemical fiber, resin, polypropylene, nanocellulose, and polyester.

[0206] In addition to the vibration transmission member 20 and the tuning fork-type sound-producing body 20S, a reinforcing member for strengthening the shaft 5 may be built into the detachable units 70 and 71 shown in Figures 31(A) to (E) above. In Figure 32(D), a truss-structured reinforcing member 73 is built into the detachable units 70 and 71. Instead of the detachable units 70 and 71, a reinforcing member to reinforce the strength of the shaft 5 may be built into the shaft cavity 9 of the shaft 5 (detachable unit for the reinforcing member). In Figure 32(E), a truss-structured reinforcing member 74 is built into the shaft cavity 9 of the shaft 5. Note that a golf club equipped with the detachable units 70 and 71 for the reinforcing member 74 may have a configuration that does not have a grip cavity 10, that is, a configuration that has at least a shaft cavity 9 inside the shaft 5. Furthermore, the thickness (wall thickness) of the shaft 5 may be reduced to make it easier for vibrations to be transmitted through the shaft 5 to the user's hand gripping the grip 6. In this case, the shaft 5 itself can be said to function as a vibration transmission member. Alternatively, the shaft 5 may have both thick and thin sections, ensuring vibration transmission in the thin section and strength in the thick section.

[0207] In addition, the golf club 1,1' may be equipped with the following functions: These functions may include an image system, vital data detection function, smartphone integration function, smartphone function, communication function, AI function, smart speaker function, display function, touch panel function, speech function (conversation function), GPS function, beacon function, etc.

[0208] Furthermore, regarding the display function using the liquid crystal display 102 described above, one or more impact sensors 104 (see Figure 33) can be provided in the head 3. When a golf ball hits the striking surface 2, the impact data is detected by the impact sensors 104 and collected by the controller 100, and this impact data can be displayed on the liquid crystal display 102 as numerical data, graphs, etc.

[0209] For example, if both the rhythm box function and the display function are included, the two functions can be switched using a toggle switch SW, as shown in Figure 33. In this case, if the switch SW is switched to connect to the liquid crystal display 102, the launch direction and digitized and graphed impact data will be displayed on the liquid crystal display 102. If the switch SW is switched to connect to speakers 96A and 96A', either the rhythm sound or synthesized voice generated by either the rhythm box function or the synthesized voice generation function of the controller 100 will be output from speakers 96A and 96A'. When the switch SW is used to connect to both the LCD display 102 and speakers 96A and 96A', the LCD display 102 displays the launch direction and digitized and graphed impact data, while speakers 96A and 96A' output either a rhythm sound or synthesized voice.

[0210] Furthermore, the movement of the weight member 61, as described with reference to Figures 22(A) and (B), may be controlled using the user's smartphone. Figure 34 is a processing block diagram illustrating a processing configuration for controlling the movement of the weight member 61 using the user's smartphone. The weight motor 62 is connected to the motor control unit 63 so as to be able to send and receive data. The motor control unit 63 is a computer device (control unit) that controls the weight motor 62 in order to move the weight member 61. The motor control unit 63 is wirelessly connected to a smartphone 65 via a communication unit 64, enabling data communication. The smartphone 65 is a portable terminal used by the user to instruct the movement of the weight member 61, and it exchanges control signals with the motor control unit 63 of the golf club 1. The smartphone 65 is equipped with a touch-input display 65A. The display 65A functions as an input unit for inputting instructions to move the weight member 61 to a desired position, and also functions as a display unit that monitors and displays the position of the weight member 61 after it has moved in response to the instruction. The wireless connection between the smartphone 65 and the motor control unit 63 may be based on a well-known wireless communication standard such as Bluetooth®.

[0211] An example of controlling the movement of a weight member 61 using a smartphone 65 is described below. First, a connection is established between the smartphone 65 and the motor control unit 63. After establishing the connection, the motor control unit 63 controls the weight motor 62 to move the weight member 61 to a predetermined initial position and supplies the smartphone 65 with information about the current position of the weight member 61. After moving the weight member 61 to a predetermined initial position, the user can input instructions for moving the weight member 61 from their smartphone 65. When a movement command is input from the smartphone 65, the motor control unit 63 controls the weight motor 62, which moves the weight member 61. Based on the current position information of the weight member 61 supplied by the motor control unit 63, the smartphone 65 can monitor and display an image on the display 65A showing the position of the weight member 61 after it has moved in response to the movement command. The user can check the current position of the weight member 61 or instruct the weight member 61 to move on the display 65A of the smartphone 65.

[0212] When a user inputs a movement instruction from their smartphone 65 to move the weight member 61 to a desired position, the smartphone 65 transmits an instruction signal to the motor control unit 63. Based on the instruction signal, the motor control unit 63 controls the weight motor 62 to move the weight member 61. When the weight member 61 moves, the position information of the weight member 61 is supplied to the smartphone 65 via the motor control unit 63, and the current position of the weight member 61 is updated on the smartphone 65's display 65A. In this case, the position of the weight member 61 can be easily and visually adjusted using the smartphone 65. Of course, a golf club that allows for the position adjustment of the weight member 61 using a smartphone 65 can also be applied to the golf practice system S shown in Figure 26.

[0213] Furthermore, as shown in Figures 35(A) and (B), the golf club 1 equipped with the vibration transmission member 20 and auxiliary vibration transmission member 20Z may also incorporate pickups 20P and 20ZP (first pickup 20P, second pickup 20ZP) to detect these vibrations. The first pickup 20P is a sensor that detects the vibration of the vibration transmission member 20 and converts it into an electrical signal, and is provided in close proximity to the vibration transmission member 20. Similarly, the second pickup 20PZ is a sensor that detects the vibration of the auxiliary vibration transmission member 20Z and converts it into an electrical signal, and is provided in close proximity to the auxiliary vibration transmission member 20Z. These pickups 20P and 20PZ generate electrical signals corresponding to the vibrations of the vibration transmission members 20 and 20Z, for example, as in an electric guitar.

[0214] The golf club 1 shown in Figure 35(A) comprises a shaft cavity 9, a grip cavity 10, a vibration transmission member 20, and a first pickup 20P. 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. The first pickup 20P is installed inside the grip cavity 10 and near the vibration transmission member 20. 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.

[0215] The golf club also comprises a hosel cavity 8, a shaft cavity 9, a vibration transmission member 20, an auxiliary vibration transmission member 20Z, and a second pickup 20ZP. Although not shown in the illustration, the golf club 1 shown in Figure 35(B) may also include a grip cavity 10 and a first pickup 20P. The auxiliary vibration transmission member 20Z is a member that transmits vibrations generated on the striking surface 2 to the vibration transmission member 20 and is provided inside the hosel cavity 8. The second pickup 20ZP is provided inside the hosel cavity 8 and near the auxiliary vibration transmission member 20Z. As a specific example of the auxiliary vibration transmission member 20Z, 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 mounting procedure for the vibration transmission members 20 and 20Z is as described in the above-mentioned embodiment. Furthermore, the placement of the first pickup 20P and the second pickup 20ZP is not limited to the locations described above; they may be placed anywhere near the vibration transmission member 20 and the auxiliary vibration transmission member 20Z.

[0216] The electrical signal detected by the first pickup 20P is amplified by an amplifier 90A built in the golf club 1 and transmitted to a speaker 90S, as shown in FIG. 36. Also, the electrical signal detected by the second pickup 20ZP may be amplified by, for example, the same amplifier 90A and transmitted to the speaker 90S. Alternatively, it may be amplified by an amplifier 90A' different from the amplifier 90A, or the amplified electrical signal may be transmitted to a speaker 90S' different from the speaker 90S. The speakers 90S, 90S' output the input electrical signal as sound. Thereby, a hitting sound is output from the speakers 90S, 90S'. This hitting sound can be adjusted by changing the amplification characteristics of the amplifiers 90A, 90A'. Incidentally, filters may be installed before and after the amplifiers 90A, 90A' as necessary to remove noise and unnecessary frequency components of the electrical signal.

[0217] In the golf club 1 shown in FIG. 35(A), the vibration generated on the hitting surface 2 of the head 3 is transmitted not only to the grip 6 via the hosel 4 and the shaft 5 but also to the grip 6 via the vibration transmission member 20. By incorporating the vibration transmission member 20 in the golf club 1, the vibration of the hitting surface 2 can be efficiently transmitted to the grip 6 without being attenuated. Therefore, a good hitting feeling can be provided to the user, and the hitting feeling can be improved as compared with existing golf clubs. Also, the vibration of the vibration transmission member 20 is detected by the first pickup 20P, converted into an electrical signal, amplified by the amplifier 90A, and then output as sound from the speaker 90S. Thereby, together with the above-described hitting feeling, a hitting sound is also output, and a good hitting feeling can be provided to the user by the synergistic effect.

[0218] In the golf club 1 shown in Figure 35(B), in addition to the vibration transmission member 20, an auxiliary vibration transmission member 20Z is built into the hosel cavity 8. By building the auxiliary vibration transmission member 20Z into the hosel 4 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. Furthermore, the vibration of the auxiliary vibration transmission member 20Z is detected by the second pickup 20ZP, and a sound corresponding to this vibration is output from the speakers 90S and 90S'. 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.

[0219] In particular, when a vibration transmission member 20 and an auxiliary vibration transmission member 20Z are provided, the vibrations transmitted by the vibration transmission member 20 and the auxiliary vibration transmission member 20Z are detected by the respective pickups 20P and 20ZP. The electrical signals resulting from these vibrations are amplified by amplifiers 90A and 90A′, filtered as appropriate, and emitted as impact sounds from speakers 90S and 90S′. This provides the user with an even better feel when hitting the ball.

[0220] 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 20P, 20ZP and the amplifiers 90A, 90A′, or between the amplifiers 90A, 90A′ and the speakers 9OS, 90S′. When the switch is ON, sound based on the detection information from the pickups 20P, 20ZP and the sensor is amplified by the amplifiers 90A, 90A′ and output from the speakers 9OS, 90S′. On the other hand, when the switch is OFF, no such sound is 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.

[0221] The golf club 1 shown in Figure 37(A) is a modified example of the golf club 1 shown in Figure 20(C). The golf club 1 shown in Figure 37(A) has a head 3 with a hollow head cavity 7 (fourth cavity) inside, and a head internal vibration transmission member 3Z is stretched in this head cavity 7. The hosel cavity 8 of the hosel 4 is provided with a first auxiliary vibration transmission member 20Z (auxiliary vibration transmission member) and a second auxiliary vibration transmission member 20Z' (auxiliary vibration transmission member). The lower end of the vibration transmission member 20 is connected to the first auxiliary vibration transmission member 20Z via a connecting part 20K. The first auxiliary vibration transmission member 20Z and the second auxiliary vibration transmission member 20Z' are connected via a connecting part 20K'. The second auxiliary vibration transmission member 20Z' and the head internal vibration transmission member 3Z are connected via a connecting part 20K''. According to this golf club 1, the vibrations generated when the golf ball is struck by the striking surface 2 of the head 3 are transmitted from the internal vibration transmission member 3Z of the head, through the first auxiliary vibration transmission member 20Z and the second auxiliary vibration transmission member to the vibration transmission member 20, and then transmitted to the grip 6 through the vibration transmission member 20. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0222] The golf club 1 shown in Figure 37(B) is a modified version of the golf club 1 shown in Figure 20(A), and its hosel 4 is a rectangular flat plate with a hollow hosel cavity 8 (third cavity) inside. An auxiliary vibration transmission member 20Z is provided inside this hosel cavity 8. The auxiliary vibration transmission member 20Z shown in Figure 37(B) is provided so as to extend along the vertical direction, its lower end is attached to the head 3, and its upper end is connected to the lower end of the vibration transmission member 20 via a connecting part 20K. According to this golf club 1, the vibrations generated when the golf ball is struck by the striking surface 2 of the head 3 are transmitted from the head 3 through the auxiliary vibration transmission member 20Z to the vibration transmission member 20, and then transmitted to the grip 6 through the vibration transmission member 20. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs.

[0223] The golf club 1 shown in Figure 37(C) is a modified example of the golf club 1 shown in Figure 37(B), in which the head 3 has a hollow head cavity 7 (fourth cavity) formed inside, and an internal head vibration transmission member 3Z is stretched in this head cavity 7. The lower end of the auxiliary vibration transmission member 20Z is connected to the internal head vibration transmission member 3Z via a connecting portion 20K'. The vibration transmission member 20 is connected to the upper end of the auxiliary vibration transmission member 20Z via a connecting portion 20K. According to this golf club 1, the vibrations generated when the golf ball is struck by the striking surface 2 of the head 3 are transmitted from the internal vibration transmission member 3Z through the auxiliary vibration transmission member 20Z to the vibration transmission member 20, and then transmitted to the grip 6 through the vibration transmission member 20. Therefore, a good feel can be provided to the user, and the feel can be improved compared to existing golf clubs. It goes without saying that the golf club described with reference to Figures 35 to 37 may also be applied to the golf practice system S shown in Figure 26.

[0224] The golf clubs 1 and 1' shown in Figure 38(A) are a modified version of the golf clubs 1 and 1' shown in Figure 31(A), and represent an example of a configuration in which a detachable unit 70 is attached to a golf club without a hosel. The golf clubs 1 and 1' shown in Figure 38(A) have a head 3, a shaft 5, and a grip 6. The shaft 5 has a shaft cavity 9 inside, and the grip 6 has a grip cavity 10 inside. The main body 70A of the detachable unit 70 is housed in the shaft cavity 9 and the grip cavity 10. The main body 70A of the detachable unit 70 is fixed to the head 3 at its lower end (one end) and to the grip upper end plate 21 inside the grip 6 at its upper end (the other end). A vibration transmission member 20 is provided in the hollow part 70B of the detachable unit 70. In other words, the configuration of the golf clubs 1 and 1' shown in Figure 38(A) is the same as that of the golf clubs 1 and 1' shown in Figure 31(A), except that they do not have a hosel. The lower end of the main body 70A may be positioned above the head 3.

[0225] The golf clubs 1 and 1' shown in Figure 38(B) are a modified version of the golf clubs 1 and 1' shown in Figure 31(C), and represent an example of a configuration in which a detachable unit 71 is attached to a golf club without a hosel. The golf clubs 1 and 1' shown in Figure 38(B) have a head 3, a shaft 5, and a grip 6. The shaft 5 has a shaft cavity 9 inside, and the grip 6 has a grip cavity 10 inside, with the main body 71A of the detachable unit 71 built into the shaft cavity 9. A tuning fork-shaped sound-producing element 20S is provided inside the hollow part 71B of the detachable unit 71. In other words, the configuration of the golf clubs 1 and 1' shown in Figure 38(B) is the same as the golf clubs 1 and 1' shown in Figure 31(C), except that they do not have a hosel. Note that in Figure 38(B), an example of a configuration in which the lower end of the main body 70A is fixed to the head 3 is shown, but the lower end of the main body 70A may be positioned above and separated from the head 3. Furthermore, as shown by the dashed line in Figure 38(B), the detachable unit 71 may extend into the grip cavity 10. Furthermore, in the detachable units 70 and 71 shown in Figures 38(A) and (B), a reinforcing member 73 shown in Figure 32(D) may be incorporated instead of the vibration transmission member 20 and the tuning fork-type sound-producing body 20S (detachable unit with reinforcing member). In this case as well, the shaft 5 can be reinforced by the detachable units 70 and 71 incorporating the reinforcing member 73.

[0226] Further details regarding the above embodiments are disclosed. <Vibration transmission member in hosel> [Note 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, The hosel is formed integrally with the head and the shaft in a manner that prevents replacement. The shaft has a first hollow cavity formed inside, The grip has a second hollow cavity inside that is hollow and communicates with the first cavity, The grip is formed integrally with the shaft, A vibration transmission member is formed in an elongated shape, with one end fixed to the hosel, and is housed in the first cavity and the second cavity, and transmits vibrations generated on the striking surface to the grip. The second cavity is provided with a mounting member that connects the other end of the vibration transmission member to the grip. A golf club characterized by the following features. <The hosel is flat.> [Note 2] The golf club according to Appendix 1, characterized in that the hosel is made of a solid material having a rectangular, flat cross-section with a solid interior. <The hosel is crank-shaped> [Note 3] The golf club as described in Appendix 1, characterized in that the hosel is made of a solid material having two bends in the middle and a solid cross-section. <The hosel is formed in a flat, hollow shape.> [Note 4] The golf club according to Appendix 1, characterized in that the hosel is rectangular in shape and has a third hollow cavity formed inside. <The hosel is crank-shaped and hollow.> [Note 5] The golf club as described in Appendix 1, characterized in that the hosel has two bends in the middle and a third hollow cavity formed inside. <Winding device> [Note 6] The golf club according to Appendix 1, characterized in that the mounting member comprises a winding device for winding the other end of the vibration transmission member manually or electrically, and a pinion that meshes with a rack fixed to the inner circumferential surface of the second cavity and is rotatably mounted to the winding device. <Built-in vibration sensor> [Note 7] The golf club according to Appendix 1, characterized in that the hosel incorporates a vibration sensor for detecting vibrations generated on the striking surface. <Built-in vibration device> [Note 8] The golf club according to Appendix 7, characterized in that the hosel is equipped with a vibration device that vibrates based on information detected by the vibration sensor, and the vibration from the vibration device is transmitted to the vibration transmission member. <Built-in speaker> [Note 9] The golf club as described in Appendix 7, characterized in that the hosel incorporates another vibrating device that vibrates based on information detected by the vibration sensor or a speaker that emits sound. <Types of vibration transmission members> [Note 10] The golf club as described in Appendix 1, characterized in that the vibration transmission member is composed of any one of a wire, a string, a rod member, a linear elastic member, or a long coil spring, or any combination of the wire, string, rod member, linear elastic member, or long coil spring. <Mounting component is membrane-like> [Note 11] The golf club according to Appendix 1, characterized in that the mounting member is formed in a membrane shape that unfolds in a direction intersecting the extending direction of the grip. <With mass component> [Note 12] The golf club according to Appendix 1, characterized in that the vibration transmission member has a mass member for amplifying vibrations. <Auxiliary vibration transmission member> [Note 13] The golf club as described in Appendix 4, characterized in that it is provided inside the third cavity and comprises an auxiliary vibration transmission member that transmits vibrations generated on the striking surface to the vibration transmission member. [Note 14] The golf club as described in Appendix 5, characterized in that it is provided inside the third cavity and comprises an auxiliary vibration transmission member that transmits vibrations generated on the striking surface to the vibration transmission member. <Forming the head into a hollow shape> [Note 15] The golf club according to Appendix 1, characterized in that the head has a fourth hollow cavity formed inside. <Weight attached to the head> [Note 16] The golf club according to Appendix 1, characterized in that the head has a weight member for changing the center of gravity of the head. <Weight details> [Note 17] The weight member is provided inside a hollow cylindrical recess formed in the upper surface of the head. A drive source for moving the weight member, The golf club according to Appendix 16, further comprising: a control unit that controls the drive source in order to rotate the weight member along the inner circumferential surface of the recess; <Rhythm Box Function> [Note 18] The golf club described in Appendix 1 is provided with a controller having a rhythm box function that indicates the rhythm when the golf ball is launched, 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. <Head adapter> [Note 19] The golf club as described in Appendix 1, characterized in that an adapter suitable for the user's physique and hitting form is detachably attached to the underside of the head. <Transmitter> [Note 20] The golf club according to Appendix 8 or Appendix 9, characterized by having a transmitter for transmitting signals from the vibration sensor to the outside. <Hosel opening> [Note 21] The golf club as described in Appendix 4, characterized in that the hosel has an opening that connects the internal space of the third cavity to the outside and transmits the resonant sound inside the hosel to the outside of the hosel. [Note 22] The golf club according to Appendix 4 or Appendix 21, characterized in that the hosel connects the internal space of the third cavity to the outside and has a covered inspection window for the vibration transmission member inside the hosel. [Note 23] The golf club as described in Appendix 22, citing Appendix 21, characterized in that the inspection window also serves as the opening for transmitting resonant sound from inside the hosel to the outside of the hosel. [Note 24] The golf club as described in Appendix 5, characterized in that the hosel has an opening that connects the internal space of the third cavity to the outside and transmits resonant sound from inside the hosel to the outside of the hosel. [Note 25] The golf club according to Appendix 5 or Appendix 24, characterized in that the hosel connects the internal space of the third cavity to the outside and has a covered inspection window for the vibration transmission member inside the hosel. [Note 26] The golf club as described in Appendix 25, citing Appendix 24, characterized in that the inspection window also serves as the opening for transmitting resonant sound from inside the hosel to the outside of the hosel. [Note 27] The golf club as described in Appendix 1, characterized in that it has a covered inspection window for the vibration transmission member inside the shaft or the grip, which connects the internal space of the first cavity or the internal space of the second cavity with the outside. <Multiple vibration transmission members> [Note 28] Multiple vibration transmission members are provided. A golf club as described in Appendix 1, characterized by the features described herein. <Multiple mounting components> [Note 29] Multiple mounting members are provided corresponding to each of the multiple vibration transmission members. A golf club as described in Appendix 28, characterized by the features described herein. [Note 30] Multiple vibration transmission members are provided, Multiple mounting members are provided corresponding to each of the multiple vibration transmission members. A golf club as described in Appendix 6, characterized by the features described therein. <Mounting plate for vibration transmission member> [Note 31] The mounting member is formed of a disc-shaped grip-side plate that extends along a surface intersecting the extending direction of the vibration transmission member. The grip-side plate is provided with a plurality of connecting holes for connecting each of the plurality of vibration transmission members. A golf club as described in Appendix 28, characterized by the features described herein. [Note 32] Each of the aforementioned plurality of vibration transmission members has one end fixed to the hosel via a disc-shaped hosel-side plate that extends along a plane intersecting the extending direction of the vibration transmission member. The hosel-side plate is provided with a plurality of connecting holes for connecting each of the plurality of vibration transmission members. A golf club as described in Appendix 28 or 31, characterized by the features described herein. <Tuning fork-type sound-producing device> [Note 33] 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, The hosel is formed integrally with the head and the shaft in a manner that prevents replacement. The shaft has a first hollow cavity formed inside, The grip has a second hollow cavity inside that is hollow and communicates with the first cavity, The grip is formed integrally with the shaft, It comprises a tuning fork-shaped sound-producing element, one end of which is fixed to the hosel and at least housed in the first cavity, which vibrates in response to the impact of striking the golf ball with the striking surface to produce sound. A golf club characterized by the following features. [Note 34] One end of the tuning fork-shaped sound-producing body is fixed to the hosel via a vibration transmission member. A golf club as described in Appendix 33, characterized by the features described herein. [Note 35] The other end of the tuning fork-shaped sound-producing body is provided with a mounting member located inside the second cavity, which connects the other end to the grip via a vibration transmission member. The mounting member comprises a winding device for winding the vibration transmission member manually or electrically, and a pinion that meshes with a rack fixed to the inner circumferential surface of the second cavity and is rotatably mounted relative to the winding device. A golf club as described in Appendix 33 or 34, characterized by the features described herein. <Cartridge / capsule containing vibration transmission element> [Note 36] A golf club comprising 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 shaft has a first hollow cavity formed inside, and the grip has a second hollow cavity formed inside that communicates with the first cavity, and which can be detachably attached to such a golf club. A main body portion is housed within the first cavity and the second cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity and the second cavity, and has a hollow portion formed inside, It comprises a vibration transmission member formed in an elongated shape, with one end fixed to the lower end of the main body, and built into the hollow portion, which transmits vibrations generated on the striking surface to the grip. A detachable unit for a vibration transmission member, characterized by the above. [Note 37] A golf club comprising 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 the user to hold, wherein the shaft has a first hollow cavity formed inside, and the grip has a second hollow cavity formed inside that communicates with the first cavity, and which can be detachably attached to the golf club. A main body portion is housed within the first cavity and the second cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity and the second cavity, and has a hollow portion formed inside, It comprises a vibration transmission member formed in an elongated shape, with one end fixed to the lower end of the main body, and built into the hollow portion, which transmits vibrations generated on the striking surface to the grip. A detachable unit for a vibration transmission member, characterized by the above. <Cartridge / capsule containing a tuning fork-shaped sound-producing element> [Note 38] A golf club comprising 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 shaft has a first hollow portion formed inside, is detachably attached to the golf club. A main body portion is housed in the first cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity, and has a hollow portion formed inside, It comprises a tuning fork-shaped sound-producing element, which is formed in an elongated shape, has one end fixed to the lower end of the main body, and is built into the hollow part, and vibrates in response to the impact of striking the golf ball with the striking surface to produce sound. A detachable unit for a tuning fork-shaped sound-producing body, characterized by the above features. [Note 39] A golf club comprising 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 the user to hold, wherein the shaft has a first hollow portion formed inside, is detachably attached to the golf club. A main body portion is housed in the first cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity, and has a hollow portion formed inside, It comprises a tuning fork-shaped sound-producing element, which is formed in an elongated shape, has one end fixed to the lower end of the main body, and is built into the hollow part, and vibrates in response to the impact of striking the golf ball with the striking surface to produce sound. A detachable unit for a tuning fork-shaped sound-producing body, characterized by the above features. <Cartridge / capsule containing reinforcing members> [Note 40] A golf club comprising 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 shaft has a first hollow portion formed inside, is detachably attached to the golf club. A main body portion is housed in the first cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity, and has a hollow portion formed inside, The hollow portion is equipped with a reinforcing member that reinforces the strength of the shaft. A detachable unit for reinforcing members, characterized by the above. [Note 41] A golf club comprising 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 the user to hold, wherein the shaft has a first hollow portion formed inside, is detachably attached to the golf club. A main body portion is housed in the first cavity, extends in the axial direction of the shaft, has a cylindrical shape that conforms to the inner circumference of the first cavity, and has a hollow portion formed inside, The hollow portion is equipped with a reinforcing member that reinforces the strength of the shaft. A detachable unit for reinforcing members, characterized by the above. <Golf practice system> [Note 42] A cup provided on the rolling surface of a golf ball struck by a golf club described in Appendix 1 or 33, or a golf club equipped with one of the detachable units described in any one of Appendix 36 to 41 (golf ball rolling surface), A striking area having the golf ball rolling surface and separated from the cup, and a rod-shaped pin that is erected in a removable manner relative to the cup and serves as a marker for the cup, A first irradiator attached to the pin irradiates a guide laser beam that shows a straight line from the pin toward the striking area, A first light receiver attached to the golf club and capable of receiving the guide laser light from the first irradiator, A second irradiator attached to the golf club, which irradiates a guide sub-laser beam from the golf club toward the pin, A second photodetector attached to the pin and capable of receiving the guide sub-laser light from the second irradiator, The system includes a display that indicates when the first light receiver receives the guide laser light and the second light receiver receives the guide sub-laser light. A golf practice system characterized by the following features. [Note 43] A golf practice machine comprising: a cup provided on the rolling surface (golf ball rolling surface) of a golf ball struck by a golf club described in Appendix 1 or 33, or a golf club equipped with any one of the detachable units described in Appendix 36 to 41; and a striking area located away from the cup and having the golf ball rolling surface, wherein a user standing in the striking area strikes the golf ball toward the cup with the golf club; A cup unit having a first detection means attached to the cup for detecting information about the golf ball going into the cup, and a first transmission device for transmitting the cup-in information to the outside, A pin unit comprising: a first imaging means attached to a rod-shaped pin that marks the cup, which captures an image from the pin toward the striking area; a second transmitting device that transmits the first image data captured by the first imaging means to an external device; and a first irradiator that irradiates a guide laser beam from the pin toward the striking area; A club unit comprising: a vibration detection means attached to the golf club used by the user in the hitting area for detecting vibration information transmitted by the vibration transmission member; a second detection means built into the head for detecting impact information related to the impact of the golf ball; a second shooting means for capturing an image from the head toward the front; a second irradiator for irradiating a guide sub-laser beam toward the head toward the front; and a third transmitting device for transmitting the vibration information, the impact information, and the second image data captured by the second shooting means to the outside; A control unit comprising: a first receiving device that receives the cup-in information transmitted from the first transmitting device, the first video data transmitted from the second transmitting device, and at least one of the vibration information, the impact information, and the second video data transmitted from the third transmitting device as monitor information; a control device that generates guide information to provide guidance for the user's golf play based on the monitor information; and a fourth transmitting device that transmits the guide information to an external source; The system comprises a second receiving device that receives the guide information transmitted from the fourth transmitting device, and a display device that presents a guide for playing golf based on the guide information, and includes a terminal device that is portable to the user. A golf practice system characterized by the following features. [Note 44] A golf club comprising a shaft formed in an axial shape, a head provided on one end of the shaft and having a striking surface for striking a golf ball, and a grip provided on the other end of the shaft and held by the user, The grip is provided with a grip member made of a mesh member formed by molding resin fibers into a net-like structure. A golf club grip characterized by the following features. [Note 45] The golf club described in Appendix 1, characterized in that an electric display member is provided on the upper surface of the head. [Note 46] The golf club as described in Appendix 45, characterized in that 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. [Note 47] The vibration transmission member is configured to contain a magnetic material, The golf club as described in Appendix 1, characterized in that a first pickup for detecting and electrically converting vibrations transmitted by the vibration transmission member is provided in close proximity to the vibration transmission member. [Note 48] The auxiliary vibration transmission member is configured to contain a magnetic material, The golf club according to Appendix 13 or 14, characterized in that a second pickup for detecting and electrically converting vibrations transmitted by the auxiliary vibration transmission member is provided in close proximity to the auxiliary vibration transmission member. [Note 49] The weight member is provided inside a linear recess formed in the upper surface of the head. A drive source for moving the weight member, The system includes a control unit that controls the drive source in order to slide the weight member along the inner circumferential surface of the recess. A golf club as described in Appendix 16, characterized by the features described herein. [Note 50] A portable mobile terminal that exchanges control signals with the control unit of the golf club described in Appendix 17 or 49, An input unit for inputting instructions to move the weight member to a desired position, The system includes a display unit that monitors and displays the position of the weight member after it has moved in response to the movement instruction from the input unit. A portable mobile terminal characterized by the following features. [Note 51] The head has a fourth hollow cavity formed inside, The golf club as described in Appendix 13, characterized by comprising an internal vibration transmission member provided inside the four cavities, which transmits vibrations generated on the striking surface to the auxiliary vibration transmission member. [Note 52] The head has a fourth hollow cavity formed inside, The golf club as described in Appendix 14, characterized by comprising an internal vibration transmission member provided inside the four cavities, which transmits vibrations generated on the striking surface to the auxiliary vibration transmission member. [Explanation of symbols]

[0227] 1. Golf club (putter) 2. Striking surface (face) 3 heads 3A, 3B adapter 4. Hosel 4A Crank-shaped hosel 4B Flat hosel 5 shafts 6 Grips 7. Head cavity (fourth cavity) 8 Hosel cavity (third cavity) 9. Shaft cavity (first cavity) 10. Grip cavity (second cavity) 20 Vibration transmission member 20X Auxiliary vibration transmission member 21. Upper end plate of the grip 22 Fixtures 23 Grip inner plate (mounting component) 24. Grip internal fixing device (mounting component) 26 Mass member 27U Upper mounting component (grip side plate) 27D Lower mounting component (hosel side plate) 28D connecting hole 28U connection hole 20S Tuning Fork Type Sounding Body 41,41′ Rack 42,42′ pinion 43,43′ Motor 44,44′ Winding device 61 Weight member 62. Motor for weights (drive source) 70 Cartridge-type detachable unit 71 Capsule-type detachable unit 80,80A,80B opening 81, 81A, 81B Lid 90,92 Opening 91,93 Lid 95,95′ Vibration sensor 96,96′: Vibration device 96A, 96A': Speakers 97 Vibration device 97A Speaker 100 controllers 101 Transmitter 102 LCD displays 200 cup unit 201 First Control Unit 202 First Sensor (First Detection Means) 203 First Communication Equipment (First Transmitter) 205 Camera 206 Sound equipment 207 Lighting equipment 208 Laser irradiator 300 control units 301 Control device 302 Receiving equipment (first transmitting equipment) 303 Transmitting device (Fourth transmitting device) 304 Storage device 400 terminal devices 401 Fourth Control Device 402 Display device (presenter) 403 Fourth communication device (second receiving device) 404 Input device 405 Sound equipment 406 Camera 500-pin unit 501 Second control unit 502 First camera (first shooting method) 503 Second communication device (second transmitter) 504 First irradiator 505 Second receiver 506 Sound equipment 507 Lighting equipment 508 Sensor 600 shooting units 601 Communication equipment 602 Camera 700 Club Unit 701 Third control unit 702 Second camera (second shooting method) 703 Third communication device (third transmitter) 704 Second sensor (second detection means) 705 Second irradiator (Second irradiator) 706 Display device 707 Sound equipment 708 First receiver 709 Lighting equipment 710 Vibration sensor (vibration detection means) 800 Electronic display board 801 Control Unit 802 Display 803 Communication equipment 804 Input device 805 Sound equipment 806 Camera 807 Sensor 808 Lighting device 901 Control Unit 902 Display device 903 Communication equipment 904 Input device 905 Sound equipment 906 Camera 907 Sensor 908 Lighting device S Golf Practice System T training aircraft T Golf Practice Machine T1 Cup Area T2 Hitting Area

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 at the other end and includes a grip that is held by the user, The hosel is formed integrally with the head and the shaft in a manner that prevents replacement. The shaft has a first hollow cavity formed inside, The grip has a second hollow cavity inside that is hollow and communicates with the first cavity, The grip is formed integrally with the shaft, A vibration transmission member is formed in an elongated shape, with one end fixed to the hosel, and is housed in the first cavity and the second cavity, and transmits vibrations generated on the striking surface to the grip. The second cavity is provided with a mounting member that connects the other end of the vibration transmission member to the grip, The mounting member comprises a winding device that winds the other end of the vibration transmission member manually or electrically, and a pinion that meshes with a rack fixed to the inner circumferential surface of the second cavity and is rotatably mounted relative to the winding device. A golf club characterized by the following features.

2. The golf club according to claim 1, characterized in that the hosel is rectangular in shape and has a third hollow cavity formed inside.

3. The golf club according to claim 1, characterized in that the hosel has two bends in the middle and a third hollow cavity formed inside.

4. The golf club according to claim 1, characterized in that the hosel incorporates a vibration sensor for detecting vibrations generated on the striking surface.

5. The golf club according to claim 4, characterized in that the hosel is equipped with a vibration device that vibrates based on information detected by the vibration sensor, and the vibration from the vibration device is transmitted to the vibration transmission member.

6. The golf club according to claim 4, characterized in that the hosel incorporates another vibrating device that vibrates based on information detected by the vibration sensor or a speaker that emits sound.

7. The golf club according to claim 1, characterized in that the head has a weight member for changing the center of gravity of the head.

8. The weight member is provided inside a hollow cylindrical recess formed in the upper surface of the head. A drive source for moving the weight member, The drive source comprises a control unit that controls the drive source in order to rotate the weight member along the inner circumferential surface of the recess. A golf club as described in claim 7, characterized in that it is a golf club.

9. The golf club according to claim 5 or claim 6, characterized in that it has a transmitter for transmitting signals from the vibration sensor to an external source.

10. The golf club according to claim 2, characterized in that the hosel connects the internal space of the third cavity to the outside and has a covered inspection window for the vibration transmission member inside the hosel.

11. The golf club according to claim 3, characterized in that the hosel connects the internal space of the third cavity to the outside and has a covered inspection window for the vibration transmission member inside the hosel.

12. The golf club according to claim 1, characterized in that it has a covered inspection window for the vibration transmission member inside the shaft or the grip, which connects the internal space of the first cavity or the internal space of the second cavity with the outside.

13. 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 at the other end and includes a grip that is held by the user, The hosel is formed integrally with the head and the shaft in a manner that prevents replacement. The shaft has a first hollow cavity formed inside, The grip has a second hollow cavity inside that is hollow and communicates with the first cavity, The grip is formed integrally with the shaft, It comprises a tuning fork-shaped sound-producing element, one end of which is fixed to the hosel and at least housed in the first cavity, which vibrates in response to the impact of striking the golf ball with the striking surface to produce sound, The other end of the tuning fork-shaped sound-producing body is provided with a mounting member located inside the second cavity, which connects the other end to the grip via a vibration transmission member. The mounting member comprises a winding device for winding the vibration transmission member manually or electrically, and a pinion that meshes with a rack fixed to the inner circumferential surface of the second cavity and is rotatably mounted relative to the winding device. A golf club characterized by the following features.

14. One end of the tuning fork-shaped sound-producing body is fixed to the hosel via a vibration transmission member. The golf club according to claim 13, characterized in that...

15. A cup provided on the rolling surface (golf ball rolling surface) of a golf ball struck by the golf club described in claim 1 or 13, A striking area located away from the cup and having the golf ball rolling surface, and a rod-shaped pin that is removably erected in relation to the cup and serves as a marker for the cup, A first irradiator attached to the pin irradiates a guide laser beam that shows a straight line from the pin toward the striking area, A first light receiver attached to the golf club and capable of receiving the guide laser light from the first irradiator, A second irradiator attached to the golf club, which irradiates a guide sub-laser beam from the golf club toward the pin, A second photodetector attached to the pin and capable of receiving the guide sub-laser light from the second irradiator, The system includes a display that indicates when the first light receiver receives the guide laser light and the second light receiver receives the guide sub-laser light. A golf practice system characterized by the following features.

16. A golf practice machine comprising: a cup provided on the rolling surface (golf ball rolling surface) of a golf ball struck by a golf club as described in claim 1 or 13; and a striking area located away from the cup and having the golf ball rolling surface, wherein a user standing in the striking area strikes the golf ball toward the cup with the golf club; A cup unit having a first detection means attached to the cup for detecting information about the golf ball going into the cup, and a first transmission device for transmitting the cup-in information to the outside, A pin unit comprising: a first imaging means attached to a rod-shaped pin that marks the cup, which captures an image from the pin toward the striking area; a second transmitting device that transmits the first image data captured by the first imaging means to an external device; and a first irradiator that irradiates a guide laser beam from the pin toward the striking area; A club unit comprising: a vibration detection means attached to the golf club used by the user in the hitting area for detecting vibration information transmitted by the vibration transmission member; a second detection means built into the head for detecting impact information related to the impact of the golf ball; a second shooting means for capturing an image from the head toward the front; a second irradiator for irradiating a guide sub-laser beam toward the head toward the front; and a third transmitting device for transmitting the vibration information, the impact information, and the second image data captured by the second shooting means to the outside; A control unit comprising: a first receiving device that receives the cup-in information transmitted from the first transmitting device, the first video data transmitted from the second transmitting device, and at least one of the vibration information, the impact information, and the second video data transmitted from the third transmitting device as monitor information; a control device that generates guide information to provide guidance for the user's golf play based on the monitor information; and a fourth transmitting device that transmits the guide information to an external source; The system comprises a second receiving device that receives the guide information transmitted from the fourth transmitting device, and a display device that presents a guide for playing golf based on the guide information, and includes a terminal device that is portable to the user. A golf practice system characterized by the following features.

17. The golf club according to claim 1, characterized in that an electric display member is provided on the upper surface of the head.

18. The golf club according to claim 17, characterized in that the above-mentioned electrical display member is a liquid crystal display capable of displaying at least one piece of information, such as 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.

19. The weight member is provided inside a linear recess formed in the upper surface of the head. A drive source for moving the weight member, The system includes a control unit that controls the drive source in order to slide the weight member along the inner circumferential surface of the recess. A golf club as described in claim 7, characterized in that it is a golf club.

20. A portable mobile terminal that exchanges control signals with the control unit of the golf club according to claim 8 or 19, An input unit for inputting instructions to move the weight member to a desired position, The system includes a display unit that monitors and displays the position of the weight member after it has moved in response to the movement instruction from the input unit. A portable mobile terminal characterized by the following features.