Folding ladder and top tray thereof

A top tray of a folding ladder, comprising:

• a fixed plate, and
• a movable plate, wherein:
• the movable plate is disposed on a rear side of the fixed plate and is rotatably connected to the fixed plate,
• the movable plate is configured to be rotated to switch between an unfolded position and a folded position,
• each of at least one connection shaft is disposed along a left-right direction of the fixed plate at a position where a top surface of the fixed plate is connected to the rear side of the fixed plate,
• a top surface of the movable plate is disposed with at least one groove extending in a front-rear direction of the movable plate,
• a left side and a right side of each of the at least one groove are respectively disposed with a slide groove extending in the front-rear direction of the movable plate,
• the at least one connection shaft is disposed in the at least one groove and two ends of the at least one connection shaft are slidably and rotatably connected to a respective one of the slide grooves disposed on the left side and the right side of the at least one groove,
• the at least one connection shaft comprises two connection shafts,
• the two connection shafts are symmetrically disposed on two sides of the fixed plate,
• the at least one groove comprises two grooves,
• the two grooves are symmetrically disposed on two sides of the movable plate,
• at least one shaft sleeve is disposed at a position where the top surface of the fixed plate and the rear side of the fixed plate are connected,
• each of the at least one shaft sleeve is coupled to a corresponding one of the two grooves,
• each of the two connection shafts is disposed in a corresponding one of the at least one shaft sleeve,
• the two ends of each of the two connection shafts extend outwardly,
• when the movable plate is in the unfolded position:
• the at least one connection shaft is disposed at a front end of the at least one groove,
• the movable plate is horizontally arranged side-by-side with the fixed plate, and
• a rear surface of the fixed plate abuts a front surface of the movable plate to maintain the movable plate in a horizontal position and to resist a downward force of gravity, and
• when the movable plate is subjected to an upward pushing force and is rotated from the horizontal position to be folded into the folded position:
• the movable plate is configured to slide relative to the at least one connection shaft until the at least one connection shaft moves to a rear end of the at least one groove, and
• the movable plate abuts the rear side of the fixed plate.

A folding ladder, comprising:

• a front ladder frame,
• a rear ladder frame, and
• a top tray, wherein:
• the top tray comprises a fixed plate and a movable plate,
• the movable plate is disposed on a rear side of the fixed plate and is rotatably connected to the fixed plate,
• the movable plate is configured to be rotated to switch between an unfolded position and a folded position,
• each of two standing columns on a left side and a right side of the rear ladder frame is pivotally connected to a corresponding one of two standing columns on a left side and a right side of the front ladder frame,
• the fixed plate of the top tray is fixedly connected to a top end of each of the two standing columns on the left side and the right side of the front ladder frame,
• each of at least one connection shaft is disposed along a left-right direction of the fixed plate at a position where a top surface of the fixed plate is connected to the rear side of the fixed plate,
• a top surface of the movable plate is disposed with at least one groove extending in a front-rear direction of the movable plate,
• a left side and a right side of the at least one groove are respectively disposed with a slide groove extending in the front-rear direction of the movable plate,
• the at least one connection shaft is disposed in the at least one groove and two ends of the at least one connection shaft are slidably and rotatably connected to a respective one of the slide grooves disposed on the left side and the right side of the at least one groove,
• at least one shaft sleeve is disposed at a position where the top surface of the fixed plate and the rear side of the fixed plate are connected,
• the at least one connection shaft comprises two connection shafts,
• the two connection shafts are symmetrically disposed on two sides of the fixed plate,
• the at least one groove comprises two grooves,
• the two grooves are symmetrically disposed on two sides of the movable plate,
• each of the at least one shaft sleeve is coupled to a corresponding one of the two grooves,
• each of the two connection shafts is disposed in a corresponding one of the at least one shaft sleeve,
• the two ends of each of the two connection shafts extend outwardly, and
• when the movable plate is in the unfolded position:
• the at least one connection shaft is disposed at a front end of the at least one groove,
• the movable plate is horizontally arranged side-by-side with the fixed plate, and
• a rear surface of the fixed plate abuts a front surface of the movable plate to maintain the movable plate in a horizontal position and to resist a downward force of gravity, and
• when the movable plate is subjected to an upward pushing force and is rotated from the horizontal position to be folded into the folded position:
• the movable plate is configured to slide relative to the at least one connection shaft until the at least one connection shaft moves to a rear end of the at least one groove, and
• the movable plate abuts the rear side of the fixed plate.