Portable golf swing exerciser and golf swing motion information providing device having the same

A golf swing motion information providing device for providing information on a shape of rotational motion of a user's body during a golf swing practice, the device comprising:

• a portable golf swing exerciser configured to be worn on the user's body during the golf swing practice performed by holding and swinging a golf club to recognize rotational motion of the user's body, the exerciser being separate from the golf club, the exerciser comprising:
• a shaft body configured to be positioned to be extended left and right near pelvises or shoulders of the user when the portable golf swing exerciser is worn;
• a first extension shaft coupled to one end of the shaft body to be extendable;
• a second extension shaft coupled to another end of the shaft body to be extendable;
• two connection belts, each belt having an end connected to the shaft body to tightly attach the shaft body to the user's body when tightened;
• a support pad connected to the two connection belts to be tightly attached to a back side of the user's body opposite to a front side of the user's body onto which the shaft body is attached as the two connection belts are tightened;
• and
• two laser generators, one of the two laser generators disposed at an end portion of the first extension shaft and the other of the two laser generators disposed at an end portion of the second extension shaft, each laser generator being configured for emitting a beam in a longitudinal direction of the shaft body,
• the device further comprising:
• a trajectory sensor for sensing trajectories of the end portion of the first extension shaft and the end portion of the second extension shaft;
• and
• a control unit for analyzing the sensed trajectories and transferring an analysis result to the user,
• wherein the trajectory sensor has a sensing surface for sensing a beam emitted from the two laser generators, and
• wherein the control unit is configured to generate rotational motion shape information including at least one of rotation angles of both knees, rotation angles of pelvises, rotation angles of shoulders, and a rotation order of the knees, the pelvises, and the shoulders from information of the user's body provided in advance and the sensed trajectories, and to transmit the rotational motion shape information to a user's terminal.