Abstract: A form changing toy includes a power source, a power transmission mechanism, an operation part, a switch, a movable part, a locking mechanism, and a connecting part. The operation part is configured to perform a predetermined operation by the power. The switch is configured to be moved between a first position to a second position, and being urged to the second position. The locking mechanism is configured to lock the movable part at the first position when the movable part is manually moved from the second position to the first position, and is configured to release locking by the power when the predetermined operation continues. The connecting mechanism is configured to operate the movable part by connecting the movable part and either one of the power transmission mechanism and the operation part when the movable part moves to the second position.

Abstract: A form changing toy is provided with a power source being configured to provide power, a first power transmission mechanism, a second power transmission mechanism, a third power transmission mechanism, a connection switching mechanism, and a form switching mechanism. The connection switching mechanism is configured to alternatively switch between a first connection and a second connection. The first connection is between the first power transmission mechanism and the second power transmission mechanism. The second connection is between the first power transmission mechanism and the third power transmission mechanism. The form switching mechanism is configured to switch between a first form and a second form of the form changing toy. The second power transmission mechanism is configured to perform a first operation when the form switching mechanism switches. The third power transmission mechanism is configured to perform a second operation when the form switching mechanism switches.

Abstract: A form changing toy includes a power source, an operation part, a movable part, a switch, and an operation mechanism. The operation part is connected to the power source to perform a predetermined movement by power from the power source. The switch is configured to be reversibly moved between a first position and a second position manually. The operation mechanism is configured to move, by the power, the movable part by making the movable part abut the power source or by making the movable part abut the operation part when the switch is at the second position, and is configured to separate the movable part from the power source or the movable part from the operation part when the switch is at the first position.

Abstract: A golf swing measurement device is placed in front of a golfer when the golfer swings a golf club to hit a golf ball. The golf swing measurement device includes a sidewall portion extending substantially in parallel to a swing path of the club head; a first sensor coil and a second sensor coil disposed along the sidewall portion for detecting a club head with a permanent magnet on a distal thereof passing therethrough; a calculation unit for calculating a swing time from a start moment of a backswing to a moment of an impact, a head speed upon the impact, and a total flying distance; a display unit for displaying the swing time, the head speed, and the total flying distance; a memory unit for storing measurement data including the swing time, head speed, and the total flying distance; and a transmission unit for sending the measurement data.

Abstract: A performance measuring device for a golf club that measures a motion state of a golf ball hit by the golf club and displays a measurement result, includes a camera part that takes a picture of the hit golf ball, a sensor part that detects a passage of the golf club hitting the golf ball and sends a trigger signal of deciding a photographing timing of the golf ball to the camera part, a control box having storage unit that stores an image of the golf ball photographed by the camera part and a USB interface that sends the image, and a mobile type computer having an arithmetical operation unit that analyzes the image, and a liquid crystal monitor that displays an analytic result. The mobile type computer includes a central processing unit having a clock frequency of 500 MHz or more, and a basic software achieving multitask and multiwindow.

Abstract: A golf swing measurement device is placed in front of a golfer when the golfer swings a golf club to hit a golf ball. The golf swing measurement device includes a sidewall portion extending substantially in parallel to a swing path of the club head; a first sensor coil and a second sensor coil disposed along the sidewall portion for detecting a club head with a permanent magnet on a distal thereof passing therethrough; a calculation unit for calculating a swing time from a start moment of a backswing to a moment of an impact, a head speed upon the impact, and a total flying distance; a display unit for displaying the swing time, the head speed, and the total flying distance; a memory unit for storing measurement data including the swing time, head speed, and the total flying distance; and a transmission unit for sending the measurement data.

Abstract: A method for selecting a golf club suitable for a golfer includes the steps of (a) obtaining at least one of head speed and hit-ball data (initial velocity, launch angle, backspin, side spin, and travel distance) when a golfer hits a golf ball with a golf club; (b) obtaining ideal hit-ball data of the golfer on the basis of the at least one of head speed and hit-ball data obtained in step (a); and (c) selecting a golf club suitable for the golfer on the basis of the ideal hit-ball data obtained in step (b).

Abstract: A performance measuring device for a golf club that measures a motion state of a golf ball hit by the golf club and displays a measurement result, includes a camera part that takes a picture of the hit golf ball, a sensor part that detects a passage of the golf club hitting the golf ball and sends a trigger signal of deciding a photographing timing of the golf ball to the camera part, a control box having storage unit that stores an image of the golf ball photographed by the camera part and a USB interface that sends the image, and a mobile type computer having an arithmetical operation unit that analyzes the image, and a liquid crystal monitor that displays an analytic result. The mobile type computer includes a central processing unit having a clock frequency of 500 MHz or more, and a basic software achieving multitask and multiwindow.

Abstract: A method for selecting a golf ball suitable for a golfer, comprising the steps of (i) obtaining head speed and backspin when a golfer hits a golf ball with a golf club; (ii) obtaining from the golfer ball-type selection data for determining which among a plurality of ball types is suitable for the golfer; and (iii) selecting a golf ball of a type (e.g., a distance-type ball or a control-type ball) suitable for the golfer on the basis of the head speed and backspin obtained in step (i) and the ball-type selection data obtained in step (ii), in such a manner that the selected golf ball produces backspin close to optimal backspin corresponding to the above-described head speed.

Abstract: A method for selecting a golf club suitable for a golfer includes the steps of (a) obtaining at least one of head speed and hit-ball data (initial velocity, launch angle, backspin, side spin, and travel distance) when a golfer hits a golf ball with a golf club; (b) obtaining ideal hit-ball data of the golfer on the basis of the at least one of head speed and hit-ball data obtained in step (a); and (c) selecting a golf club suitable for the golfer on the basis of the ideal hit-ball data obtained in step (b).

Abstract: A method for selecting a golf ball suitable for a golfer, comprising the steps of (i) obtaining head speed and backspin when a golfer hits a golf ball with a golf club; (ii) obtaining from the golfer ball-type selection data for determining which among a plurality of ball types is suitable for the golfer; and (iii) selecting a golf ball of a type (e.g., a distance-type ball or a control-type ball) suitable for the golfer on the basis of the head speed and backspin obtained in step (i) and the ball-type selection data obtained in step (ii), in such a manner that the selected golf ball produces backspin close to optimal backspin corresponding to the above-described head speed.

Abstract: In an iron club set, the lie angle of each iron club in an iron club set is selected to be 61 degrees or larger. The lie angles of the iron clubs are set at a fixed value for every type of the iron clubs including a short iron to a long iron or progressively increase in angle value from the short iron to the long iron. Further, a ratio (L/H) of the minimum height (L) of the face at the heel to the maximum height (H) of the face of the club head, progressively increase in value in going to the long irons.