Rotary positioning dumbbell combination structure and dumbbell
A rotary positioning dumbbell combination structure and a dumbbell adopting the combination structure, and the rotary positioning dumbbell combination structure comprises at least one dumbbell plate body, and at least one of at least one radial protrusion or at least one radial groove is arranged on left and right sides of the at least one dumbbell plate body; at least one radial groove and at least one radial protrusion are matched; the at least one positioning protrusion is provided in the at least one radial groove; at least one radial elastic sheet is provided on the at least one radial protrusion; and the at least one positioning groove is provided on the at least one radial elastic sheet at a position facing the at least one positioning protrusion.
1 . A rotary positioning dumbbell combination structure, comprising at least one dumbbell plate body, including at least one radial protrusion located on a first side of the plate body and at least one radial groove located on a second, opposing side of the plate body;
an inner periphery of the at least one radial groove and an outer periphery of the at least one radial protrusion are defined in terms of blocking plates and corresponding insertion grooves; at least two axial blocking plates at the second side of the plate body are uniformly arranged on at least one outer end surface of the at least one radial groove; at least one internal insertion groove is arranged at inner sides of the axial blocking plates at the second side of the plate body; at least two axial blocking plates at the first side of the plate body are uniformly distributed on the at least one outer end surface of the at least one radial protrusion; and at least one external insertion groove is provided on inner sides of the axial blocking plates at the first side of the plate body; and
at least one positioning protrusion is provided in the at least one radial groove; at least one radial elastic sheet is provided on the at least one radial protrusion; at least one positioning groove is provided on the at least one radial elastic sheet at a position opposite to the at least one positioning protrusion; and at least one first anti-dropping protrusion and at least one second anti-dropping protrusion are respectively provided on the left and right sides of the at least one positioning groove.
2 . The rotary positioning dumbbell combination structure according to claim 1 , wherein at least one fixing frame is provided in the at least one dumbbell plate body; at least one elastic component is radially fixed in the at least one fixing frame; and at least one end of the at least one elastic component contacts with the at least one radial elastic sheet and exerts force on the at least one radial elastic sheet.
3 . The rotary positioning dumbbell combination structure according to claim 1 , wherein the at least one radial elastic sheet is designed integrally with the at least one radial protrusion; at least one blocking part is provided on at least one side panel provided with the at least one radial protrusion; and an outer side of the at least one radial elastic sheet is limited by the at least one blocking part.
4 . The rotary positioning dumbbell combination structure according to claim 1 , wherein at least one positioning gap is arranged between the at least one positioning protrusion and the axial blocking plates at the second side of the plate body; and the at least one positioning gap is filled by the at least one first anti-dropping protrusion at an edge of the at least one positioning groove.
5 . The rotary positioning dumbbell combination structure according to claim 1 , wherein the axial blocking plate of the radial groove is arranged at at least one end of the at least one internal insertion groove.
6 . The rotary positioning dumbbell combination structure according to claim 1 , wherein the axial blocking plate of the protrusion is provided on at least one end of the at least one external insertion groove.
7 . A dumbbell, wherein joints between middle dumbbell plate bodies, inner dumbbell plate bodies and end dumbbell plate bodies adopt the rotary positioning dumbbell combination structure according to claim 1 .