Abstract: A recoil starter capable of introducing cooling air into an engine through the recoil starter and reducing a size and weight thereof. Annular recesses are formed in opposing joint surfaces of a rope reel and a cam, respectively, in a manner to face each other. A damper spring is received in the annular recesses while opposite ends thereof are respectively held at the rope reel and the cam so that the rope reel and the cam are rotationally coupled together via the damper spring. Air inlets for introducing air for cooling the engine are formed in a side wall of a casing. Air passages facing the air inlets of the casing are formed between a drum portion at an outer periphery of the rope reel and a boss portion forming the annular recess of the rope reel.

Abstract: A recoil starter having improved durability by inhibiting excessive deformation of a damper spring, and capable of receiving a damper spring with high shock-absorbing and force-storing capabilities. The recoil starter includes a rope reel and a cam which are rotated by pulling a recoil rope, so that a rotation of the cam is transmitted to an engine via a ratchet mechanism to start the engine. A damper spring which couples the rope reel and the cam to each other has, at opposite ends thereof, engaging portions radially movably supported by holding portions of the rope reel and the cam, respectively, so that substantially the overall length of the damper spring winds and tightens uniformly around outer peripheral surfaces of both bosses of the rope reel and the cam due to a startup resistance of the engine.

Abstract: A recoil starter capable of readily staring an engine and reducing the number of components and manufacturing costs thereof and reducing a size and weight thereof. The recoil starter is so constructed that a rotational force accumulated in a cushioning and force accumulating means interposed between a rope reel and a cam is transmitted via the cam to a drive pulley, to thereby start the engine. A ratchet mechanism is provided between the rope reel and the cam so as to uncouple the cam from the rope reel when the rope reel is rotated in an engine starting direction and so as to couple the cam to the rope reel when the rope reel is rotated in a direction opposite to the engine starting direction, thus rotating the cam and the rope reel together in said opposite direction.

Abstract: A recoil starter having improved durability by inhibiting excessive deformation of a damper spring, and capable of receiving a damper spring with high shock-absorbing and force-storing capabilities. The recoil starter includes a rope reel and a cam which are rotated by pulling a recoil rope, so that a rotation of the cam is transmitted to an engine via a ratchet mechanism to start the engine. A damper spring which couples the rope reel and the cam to each other has, at opposite ends thereof, engaging portions radially movably supported by holding portions of the rope reel and the cam, respectively, so that substantially the overall length of the damper spring winds and tightens uniformly around outer peripheral surfaces of both bosses of the rope reel and the cam due to a startup resistance of the engine.

Abstract: A recoil starter capable of starting an engine easily has a reduced number of components and a simple structure, and enables miniaturization and a cost reduction. A damper spring having one end thereof fixed to a reel and provided at the other end thereof with an operation section is arranged in such a manner that the operation section thereof is engageable with a centrifugal ratchet provided on a rotating member of the engine, so that a shock caused by the engine is absorbed by the damper spring and a rotating force from the reel is stored therein.

Abstract: A recoil starter capable of readily staring an engine and reducing the number of components and manufacturing costs thereof and reducing a size and weight thereof. The recoil starter is so constructed that a rotational force accumulated in a cushioning and force accumulating means interposed between a rope reel and a cam is transmitted via the cam to a drive pulley, to thereby start the engine. A ratchet mechanism is provided between the rope reel and the cam so as to uncouple the cam from the rope reel when the rope reel is rotated in an engine starting direction and so as to couple the cam to the rope reel when the rope reel is rotated in a direction opposite to the engine starting direction, thus rotating the cam and the rope reel together in said opposite direction.

Abstract: A recoil starter capable of introducing cooling air into an engine through the recoil starter and reducing a size and weight thereof. Annular recesses are formed in opposing joint surfaces of a rope reel and a cam, respectively, in a manner to face each other. A damper spring is received in the annular recesses while opposite ends thereof are respectively held at the rope reel and the cam so that the rope reel and the cam are rotationally coupled together via the damper spring. Air inlets for introducing air for cooling the engine are formed in a side wall of a casing. Air passages facing the air inlets of the casing are formed between a drum portion at an outer periphery of the rope reel and a boss portion forming the annular recess of the rope reel.

Abstract: A recoil starter has a starter case provided around a starter shaft. A one-way clutch mechanism is formed between one end of the starter shaft and an engine. A reel is mounted rotatably on the starter shaft and a rope is wound in a groove of the reel. A first spiral spring has its ends fixed respectively to the starter case and reel and urges the reel in the direction in which the rope is taken up. A second spiral spring has its ends fixed respectively to the reel and transmits a rotational force of the reel to the starter shaft when the rope is drawn out. The peak load at the engine starting time is absorbed in the second spiral spring.

Abstract: A recoil starter capable of starting an engine easily has a reduced number of components and a simple structure, and enables miniaturization and a cost reduction. A damper spring having one end thereof fixed to a reel and provided at the other end thereof with an operation section is arranged in such a manner that the operation section thereof is engageable with a centrifugal ratchet provided on a rotating member of the engine, so that a shock caused by the engine is absorbed by the damper spring and a rotating force from the reel is stored therein.

Abstract: A recoil starter has a starter case provided around a starter shaft. A one-way clutch mechanism is formed between one end of the starter shaft and an engine. A reel is mounted rotatably on the starter shaft and a rope is wound in a groove of the reel. A first spiral spring has its ends fixed respectively to the starter case and reel and urges the reel in the direction in which the rope is taken up. A second spiral spring has its ends fixed respectively to the reel and transmits a rotational force of the reel to the starter shaft when the rope is drawn out. The peak load at the engine starting time is absorbed in the second spiral spring.

Abstract: A starting apparatus for small-sized engines which is composed of a combination of a cell motor and a recoil starter is disclosed. A rotor gear is loosely fitted on a support shaft of the recoil starter on which a reel is supported, and the rotor gear is also meshed with a pinion gear constituting a reduction gear of the cell motor which is disposed side by side with the recoil starter. When the recoil starter is used, the rotor gear is rotated through the reel. When either the cell motor or the recoil starter is actuated, the rotor gear is rotated only in the forward direction by the function of a one-way clutch (including a ratchet type one-way clutch), whereas, when the reel or the pinion gear rotates reversely, they race but do not cause the rotor gear to rotate by the function of the one-way clutches. The forward rotation of the rotor gear is used to drive a pulley which is secured to the crankshaft, thus starting the engine.