Wheeled platform and wheeled platform system

A wheeled platform system comprising:

• a wheeled platform;
• a striker that is fixed;
• a fixed side terminal disposed on a member to which the striker is fixed;
• a fixed side terminal holder configured to hold the fixed side terminal;
• a lock device disposed on the wheeled platform and including a latch that is lockable to the striker;
• a guide member disposed on the wheeled platform and configured to guide the striker to a position where the striker is lockable to the latch;
• a wheeled platform side terminal disposed on the wheeled platform and situated in a position contactable with the fixed side terminal when the latch locks the striker;
• a wheeled platform side terminal holder disposed on the wheeled platform and configured to hold the wheeled platform side terminal;
• a spring disposed on at least either one of the wheeled platform or the member to which the striker is fixed and configured to cause an elastic force oriented to enhance a contact surface pressure between the wheeled platform side terminal and the fixed side terminal to act on at least one of the wheeled platform side terminal or the fixed side terminal;
• and
• a magnet disposed on at least either one of the wheeled platform side terminal holder or the fixed side terminal holder and configured to generate a magnetic attraction force that enhances a contact surface pressure between the wheeled platform side terminal and the fixed side terminal when the wheeled platform side terminal contacts the fixed side terminal;
• wherein, when directions in which the base is moved when the latch and the striker are locked to each other are lock directions, at least one of the wheeled platform side terminal or the fixed side terminal holder is slidable in the lock directions, and
• wherein the wheeled platform is configured such that the guide member contacts the striker before the wheeled platform side terminal contacts the fixed side terminal.