Disclosed is an electric surfboard that can determine whether or not a user is on board while the surfboard is working, and if not, can stop operation of the surfboard, and that can naturally cool heat generated from a control unit and a motor unit. The electric surfboard includes a surfboard housing, foot bindings which are put on a user, a step-out detecting unit for creating a magnetic field and attracted to the housing by a magnetic force, as well as being physically coupled to an ankle strap, in which if the user steps out of the surfboard, the step-out detecting unit being detached from the housing, thereby detecting step-out of the user, and a control unit receiving a step-out detecting signal outputted from the step-out detecting unit to send a signal for stopping operation of the surfboard.

Disclosed is an electric surfboard that can determine whether or not a user is on board while the surfboard is working, and if not, can stop operation of the surfboard, and that can naturally cool heat generated from a control unit and a motor unit. The electric surfboard includes a surfboard housing, foot bindings which are put on a user, a step-out detecting unit for creating a magnetic field and attracted to the housing by a magnetic force, as well as being physically coupled to an ankle strap, in which if the user steps out of the surfboard, the step-out detecting unit being detached from the housing, thereby detecting step-out of the user, and a control unit receiving a step-out detecting signal outputted from the step-out detecting unit to send a signal for stopping operation of the surfboard.

A jet propelled boat includes a boat body, a hatch, a pair of front end movement restrictors spaced apart from each other in a right-left direction in a vicinity of a front end of the hatch so as to restrict movement of the front end with respect to the deck, a rear end lock provided in a vicinity of a rear end of the hatch so as to restrict upward movement of the rear end, and a pair of rear end movement restrictors provided on both sides of the rear end lock in the right-left direction so as to restrict horizontal movement of the rear end.

A jet propelled boat includes a boat body, a hatch, a pair of front end movement restrictors spaced apart from each other in a right-left direction in a vicinity of a front end of the hatch so as to restrict movement of the front end with respect to the deck, a rear end lock provided in a vicinity of a rear end of the hatch so as to restrict upward movement of the rear end, and a pair of rear end movement restrictors provided on both sides of the rear end lock in the right-left direction so as to restrict horizontal movement of the rear end.

A jet propelled boat includes a boat body including a hull and a deck located above the hull, and a pair of frames, one frame provided on each of a right side and a left side of the deck so as to sandwich the deck in a right-left direction of the jet propelled boat. The deck includes an upper deck and a lower deck, and each of the pair of frames includes a connector that spans the upper deck and the lower deck so as to connect the upper deck to the lower deck.

A jet propelled boat includes a boat body including a hull and a deck located above the hull, and a pair of frames, one frame provided on each of a right side and a left side of the deck so as to sandwich the deck in a right-left direction of the jet propelled boat. The deck includes an upper deck and a lower deck, and each of the pair of frames includes a connector that spans the upper deck and the lower deck so as to connect the upper deck to the lower deck.

A large-scale, high-mobility all-terrain vehicle is equipped with at least two articulated front legs and at least two articulated rear legs. Each articulated leg is connected to the vehicle structure about two mutually orthogonal axes to allow a variation of the track width distance between each pair of track assemblies and a variation of the height of the vehicle structure with respect to each track assembly. Each track assembly is connected to the respective leg about a horizontal transverse axis and about a vertical axis, and about a longitudinal axis. The vehicle structure has a front module and a rear module articulated about a longitudinal axis and a driving cabin that can be rotated downwards to allow ample visibility of the ground in front. The track assemblies are connected to the respective articulated legs by quick coupling devices.

A large-scale, high-mobility all-terrain vehicle is equipped with at least two articulated front legs and at least two articulated rear legs. Each articulated leg is connected to the vehicle structure about two mutually orthogonal axes to allow a variation of the track width distance between each pair of track assemblies and a variation of the height of the vehicle structure with respect to each track assembly. Each track assembly is connected to the respective leg about a horizontal transverse axis and about a vertical axis, and about a longitudinal axis. The vehicle structure has a front module and a rear module articulated about a longitudinal axis and a driving cabin that can be rotated downwards to allow ample visibility of the ground in front. The track assemblies are connected to the respective articulated legs by quick coupling devices.

Disclosed is an electric surfboard that can determine whether or not a user is on board while the surfboard is working, and if not, can stop operation of the surfboard, and that can naturally cool heat generated from a control unit and a motor unit. The electric surfboard includes a surfboard housing, foot bindings which are put on a user, a step-out detecting unit for creating a magnetic field and attracted to the housing by a magnetic force, as well as being physically coupled to an ankle strap, in which if the user steps out of the surfboard, the step-out detecting unit being detached from the housing, thereby detecting step-out of the user, and a control unit receiving a step-out detecting signal outputted from the step-out detecting unit to send a signal for stopping operation of the surfboard.

Disclosed is an electric surfboard that can determine whether or not a user is on board while the surfboard is working, and if not, can stop operation of the surfboard, and that can naturally cool heat generated from a control unit and a motor unit. The electric surfboard includes a surfboard housing, foot bindings which are put on a user, a step-out detecting unit for creating a magnetic field and attracted to the housing by a magnetic force, as well as being physically coupled to an ankle strap, in which if the user steps out of the surfboard, the step-out detecting unit being detached from the housing, thereby detecting step-out of the user, and a control unit receiving a step-out detecting signal outputted from the step-out detecting unit to send a signal for stopping operation of the surfboard.