Patent ID: 7588257

Claim:
A trammer comprising: a panel ( 1 ), a handspike ( 2 ), a handspike slot ( 11 ) corresponding to the handspike ( 2 ), the handspike being located on both lateral sides of the panel ( 1 ), a locating device connected with the handspike ( 2 ) and located on the panel ( 1 ), the locating device including a location hole ( 21 ) at the inside bottom of the handspike ( 2 ), an elastic fastener corresponding to the location hole ( 21 ), the elastic fastener including a slipper slot ( 13 ), a slipper ( 15 ) provided in the slipper slot, and a slot cover ( 14 ) provided over the slipper slot, an elastic piece is provided on one lateral side of the slipper ( 15 ), a location piece is located on an opposite lateral side of the slipper ( 15 ), a handspike connector including a locating slot ( 12 ), and a handspike cover ( 22 ) and a slip unit disposed inside the locating slot ( 12 ), wherein the slip unit is adapted to make the handspike cover ( 22 ) slip up and down, and the location piece is engaged with the location hole ( 21 ) via the slipper slot ( 13 ) and locating slot ( 12 ).