An exercise device for performing exercises suitable to strengthen thigh and hip muscles such as a leg press machine, a total hip, a stationary bicycle, or a moving bicycle, and more particularly provides an exercise device for strengthening thigh and hip muscles while protecting the knees and ankle joints by enabling a user to locate a lower end of an arm on the user's thighs in a sitting, prone or supine position and move the user's legs in order to minimize a load or stress added to the knee and ankle joints.

An exercise device for performing exercises suitable to strengthen thigh and hip muscles such as a leg press machine, a total hip, a stationary bicycle, or a moving bicycle, and more particularly provides an exercise device for strengthening thigh and hip muscles while protecting the knees and ankle joints by enabling a user to locate a lower end of an arm on the user's thighs in a sitting, prone or supine position and move the user's legs in order to minimize a load or stress added to the knee and ankle joints.

A reciprocating mechanism includes a first connecting element, a crankshaft and a second connecting element. The crankshaft includes a rotation shaft, a first following element and a second following element. The first following element is pivotally disposed on one side of the rotation shaft and movably coupled to the first connecting element. The second following element is pivotally disposed on the other side of the rotation shaft, and a first angle is formed between the first following element and the second following element. The second connecting element is movably coupled to the second following element. The first following element and the second following element are configured to rotate around the rotation shaft so as to be movably coupled to and cause each of the first connecting element and the second connecting element to reciprocate and cyclically pivot along an arc-shaped trajectory.

A scooter has a front wheel at a proximal end of a platform and a rear wheel at opposing distal end of the platform. A shaft extends upward from the proximal end of the platform. The shaft terminating in a handle bar. A friction motor propels one of the front wheel or the rear wheel of the scooter the scooter.

A locking/unlocking system for traction systems actuated by pedal levers, which includes: a blocking element (1); a receiving element (10); an automatic activation means (3) for coupling and uncoupling the blocking element (1) of the receiving element (10); at least, a control means (16) for controlling the automatic activation means (3); at least, a switch (15a, 15b) for turning the control means on and/or off (16); and at least, a power source (17). A pedal lever (9) for traction systems actuated by pedal levers, which includes: a locking/unlocking system, in accordance with this invention. A traction system actuated by pedal levers, which in turn includes: a pedal lever (9) in accordance with this invention on each of the two ends of the central axis (8), which is introduced and fastened to the adapter (7) of the freewheel (6), or directly onto the freewheel (6) of the lever (9).

A locking/unlocking system for traction systems actuated by pedal levers, which includes: a blocking element (1); a receiving element (10); an automatic activation means (3) for coupling and uncoupling the blocking element (1) of the receiving element (10); at least, a control means (16) for controlling the automatic activation means (3); at least, a switch (15a, 15b) for turning the control means on and/or off (16); and at least, a power source (17). A pedal lever (9) for traction systems actuated by pedal levers, which includes: a locking/unlocking system, in accordance with this invention. A traction system actuated by pedal levers, which in turn includes: a pedal lever (9) in accordance with this invention on each of the two ends of the central axis (8), which is introduced and fastened to the adapter (7) of the freewheel (6), or directly onto the freewheel (6) of the lever (9).

A transmission mechanism includes: a main shaft, a power input member, a gear component, and a one-way transmission component. The gear component is arranged on the main shaft. The one-way transmission component is sleeved on the main shaft. The one-way transmission component is connected with the power input member and the gear component. The one-way transmission component enables the gear component to perform one-way transmission under the action of the power input member. The gear component is connected with a power output member in a transmission way to change a rotation speed transmitted from the power input member to the power output member. The power input member performs reciprocating motion with the main shaft as an axis to drive the power output member to move. By arranging the one-way transmission component, the transmission mechanism can perform arc reciprocating motion, thereby improving transmission efficiency.

A reciprocating action drive is disclosed in which a pair of magnetically sprung over-running clutches, each in overrunning connection with a driven shaft, and attached to a reciprocating lever, are joined via a direction reversing mechanism. In one embodiment, the direction reversing mechanism uses bevel gears, two of which are connected to the outer shells of the overrunning clutches. One or more intermediate bevel gears, mounted orthogonally to the axis of the driven shaft, mesh with the others to form the reversing mechanism. In a further embodiment, the reciprocating action drive is used to power a bicycle using a standard chain ring and chain arrangement and a cadence equalizing 3× epicyclic gear train. In a still further embodiment, sprung limit stops limit the range of motion of the reciprocating levers to 60-degrees, and make stopping at the end of the tread less abrupt.

A vehicle propellable by a human comprising a front assembly having a front wheel and a pair of hand pedals connect thereto; a rear assembly having a first rear wheel and a second rear wheel rotatably connected thereto; a chest rest located between the front assembly and the rear assembly, the chest rest configured to support the chest of a rider lying forward on the vehicle; and a first foot support structure operatively coupled to rotate the first rear wheel, and a second foot support operatively coupled to rotate the second rear wheel wherein the first rear wheel and second rear wheel are independently rotated by opposite feet of a rider when said feet are within said first and second foot support, respectively.

The invention discloses a ratchet-driven self-propelled scooter, comprising a scooter body and a transmission mechanism set on the scooter body; the invention provides a manpower self-propelled scooter with simple structure, light weight and low cost; step on a driving pedal to put a driving clamp in motion, thereby a pressing arm wheel drives a ratchet arm, then a ratchet pawl leads an axle to drive the rear traveling wheels to rotate, so that the scooter body moves; after releasing the driving pedal, the driving pedal is reset through a torsion spring, likewise repeatedly stepping to increase the driving force for the scooter body; the device possesses a complete scheme, simple structure, convenient operation, low cost, which is worthy of widespread promotion.