Embodiments include strollers having removable seats. An example stroller may include rear wheels, front wheels, and a frame including a handle portion, a rear wheel support portion, a front wheel support portion and a folding mechanism connecting the front wheel support portion and the handle portion in both an unfolded configuration and in a folded configuration. The frame may include a stroller seat support portion positioned at a first vertical position adjacent the handle portion, and a front seat attachment configured for attachment to the front wheel support portion at a second vertical position substantially lower than the first vertical position. The front seat attachment may be configured to support the front stroller seat substantially over the front wheels so that a center of gravity of the stroller system is between the front wheels and the rear wheels.

A limiting structure of a bicycle includes a handlebar, a rotating member, a front fork, and a frame. The frame is provided with a mounting portion. The handlebar is partially accommodated at one end of the mounting portion, and the front fork is partially accommodated at the other end of the mounting portion. The rotating member is accommodated in the mounting portion. Two ends of the rotating member are movably connected to the front fork and the handlebar, respectively. An annular movable groove is formed between an inner wall of the mounting portion and the rotating member. The front fork is provided with a first limiting block, and the first limiting block is movably accommodated in the movable groove. The frame further includes a second limiting block, and the second limiting block is fixedly accommodated in the movable groove.

A limiting structure of a bicycle includes a handlebar, a rotating member, a front fork, and a frame. The frame is provided with a mounting portion. The handlebar is partially accommodated at one end of the mounting portion, and the front fork is partially accommodated at the other end of the mounting portion. The rotating member is accommodated in the mounting portion. Two ends of the rotating member are movably connected to the front fork and the handlebar, respectively. An annular movable groove is formed between an inner wall of the mounting portion and the rotating member. The front fork is provided with a first limiting block, and the first limiting block is movably accommodated in the movable groove. The frame further includes a second limiting block, and the second limiting block is fixedly accommodated in the movable groove.

Disclosed is a children's vehicle, which comprises a main vehicle frame extending in a front-rear direction, two front wheels disposed respectively on the left and right sides of the bottom-front portion of the main vehicle frame, a joystick extending upwardly inclined from front to rear, a sliding member slidingly disposed on the main vehicle frame, and a connecting bar rotatably connected between the joystick and the sliding member, wherein a lower portion of the joystick is connected to rotatably a front portion of the main vehicle frame. The children's vehicle further comprises first connecting rods, one end of each of which is rotatably connected on the main vehicle frame, and second connecting rods rotatably connected between the first connecting rods and the sliding member, the front wheels are mounted on the other ends of the first connecting rods. When the children's vehicle switches from an unfolded state to a folded state, the joystick is folded close to the main vehicle frame, the second connecting rods drive the first connecting rods to close to the main vehicle frame, and the two front wheels are folded close to the left and right sides of the main vehicle frame. When folded, the children's vehicle is very flat and compact, and the overall height and width thereof are greatly reduced.

Disclosed is a children's vehicle, which comprises a main vehicle frame extending in a front-rear direction, two front wheels disposed respectively on the left and right sides of the bottom-front portion of the main vehicle frame, a joystick extending upwardly inclined from front to rear, a sliding member slidingly disposed on the main vehicle frame, and a connecting bar rotatably connected between the joystick and the sliding member, wherein a lower portion of the joystick is connected to rotatably a front portion of the main vehicle frame. The children's vehicle further comprises first connecting rods, one end of each of which is rotatably connected on the main vehicle frame, and second connecting rods rotatably connected between the first connecting rods and the sliding member, the front wheels are mounted on the other ends of the first connecting rods. When the children's vehicle switches from an unfolded state to a folded state, the joystick is folded close to the main vehicle frame, the second connecting rods drive the first connecting rods to close to the main vehicle frame, and the two front wheels are folded close to the left and right sides of the main vehicle frame. When folded, the children's vehicle is very flat and compact, and the overall height and width thereof are greatly reduced.

A leg actuator mechanism, a method of manufacturing the leg actuator mechanism, and a doll implementing a leg actuator mechanism is provided. The leg actuator includes an upper leg mechanism comprising a hip end and an opposing knee end. The leg actuator also includes a lower leg mechanism comprising a first end and an opposing second end, wherein the first end of the lower leg portion is operably coupled to the knee end of the upper leg portion. The leg actuator further includes a follower mechanism. The follower mechanism includes a mounting defining a follower pathway configured to receive a follower joint. The follower mechanism also includes an upper follower connector and a lower follower connector. The follower mechanism moves at least one of the upper leg mechanism or the lower leg mechanism when activated.

A detachable seat assembly, including: a handle member, a seat member and a saddle member, the handle member including a mounting portion at a bottom side thereof, the mounting portion including an inner threaded hole at a front side thereof and a buckling member; the seat member and the handle member being detachably connected, the seat member including a mounting hole within which the mounting portion is inserted, the seat member further including a knob and a first hole, the knob including a handle and a threaded section, the threaded section being screwed to the inner threaded hole, the buckling member being disposed through the first hole; the saddle member being mounted on the handle member and the seat member.

A detachable seat assembly, including: a handle member, a seat member and a saddle member, the handle member including a mounting portion at a bottom side thereof, the mounting portion including an inner threaded hole at a front side thereof and a buckling member; the seat member and the handle member being detachably connected, the seat member including a mounting hole within which the mounting portion is inserted, the seat member further including a knob and a first hole, the knob including a handle and a threaded section, the threaded section being screwed to the inner threaded hole, the buckling member being disposed through the first hole; the saddle member being mounted on the handle member and the seat member.

A training bicycle with a removably attachable pedal unit enabling adjustment of chain slack by a simple method is provided. The detachable pedal unit is configured to enable attachable/detachable connection of a pedal crank to a bicycle body. The pedal unit includes a unit body having a unit connector for rotatably retaining and fastening to a bicycle body a pedal crank axially supporting a chain wheel. A unit receiving member fixedly installed on the bicycle body to interconnect with the unit connector. A sliding adjustment mechanism provided on the unit receiving member and the unit connector to vary and fix mutual fore-aft connection position of the unit receiving member and the unit connector in order to adjust fore-aft connection position of the bicycle detachable pedal unit relative to the bicycle body and thereby adjusting the chain tension.

A ride-on vehicle for children comprising a main body that includes one or more built-in toy vehicle tracks that allow a toy vehicle to travel on the main body. A wheel assembly comprising a plurality of wheels is coupled to the main body. A drive assembly is operatively coupled to the wheel assembly and is configured to drive two or more wheels of the wheel assembly. A steering assembly is also operatively coupled to the wheel assembly and is configured to steer the vehicle based on a received user input.