Bat gripping structure and bat structure provided with same

A bat grip structure which includes a bat head H, a bat barrel portion, a bat throat portion T, a bat grip portion G and a grip end E, characterized by the provision of:

• 1) a gravitational center position changing structure for displaying the original position of a bat center of gravity C, which lies at the bat barrel portion B, in a batting centroid Pc direction by adding an additional weight ΔM to the bat head, the grip portion has a sectional shape perpendicular to the longitudinal axis of the bat, which shape is represented by a generally oval shape suited for gripping with a palm, in which when the grip center Gc is moved to Gc1, the batting centroid Pc is adjustable to Pc1 while securing the palm grip of the bottom hand is secured,
• and in that 2) the grip end is inclined forwards at an angle within the range of 20 to 30 relative to a plane perpendicular to the longitudinal axis of the bat, and has a lock structure capable of turning about the hand wrist of the bottom hand to urge towards a thumb side
• and 3) the grip end bulges, laterally outwardly at least one side of an end inclined face over the generally oval section of the grip portion to form a Japanese OTAFUKU shaped bulge portion having a step portion between the grip end and the grip portion G for engaging with the little finger tip and/or the palm edge adjacent to the little finger third joint of the bottom hand in a manner to prevent the bottom hand edge from slipping out from the grp end during the swinging,
• and a function of transmitting the batting centroid Pc˜Pc1 where the maximum moment ω imposed on the center of gravity that is obtained at the maximum angular velocity ω brought about by the grip structure.