Power transmission mechanism between engine starting device and engine

A power transmission mechanism between an engine starting device and an engine, comprising:

• a first actuator storing an energy to start the engine through a first external operation;
• and
• a second actuator in which a damping and force accumulating means is interposed in a power transmission system between a rotation drive portion and a rotation driven portion, a power of the drive portion is accumulated between the damping and force accumulating means and the rotation driven portion, the accumulated force is released by canceling a lock of the rotation driven portion at a desired time, and the engine is started via an automatic connecting and disconnecting means arranged between the rotation driven portion and the engine, wherein
• the damping and force accumulating means has a power spring barrel drum and a power spring having one end supported to the barrel drum, and the rotation driven portion supports the other end of the power spring and is provided with a first engaging and disengaging lever engaging and disengaging in accordance with a second external operation so as to lock or unlock a rotation in one direction of the rotation driven portion, a first ratchet portion having a plurality of ratchet teeth engaging with and disengaging from the first engaging and disengaging lever, and a second ratchet portion having a plurality of ratchet teeth engaging with and disengaging from the automatic connecting and disconnecting means,
• the power spring barrel drum is provided with a second engaging and disengaging lever engaging and disengaging in cooperation with the first engaging and disengaging lever in accordance with the second external operation so as to lock or unlock a rotation in one direction of the power spring barrel drum, and a third ratchet portion having a plurality of outer peripheral ratchet teeth engaging with and disengaging from the second engaging and disengaging lever,
• the automatic connecting and disconnecting means is pivotally supported to a member working with an engine rotation in a pivotally attached portion, has an engaging and disengaging pawl portion in a leading end, has a lever-shaped engaging and disengaging member energized in such a direction that the engaging and disengaging pawl portion engages with the second ratchet portion, and is provided with a centrifugal clutch function such that when the crank shaft of the engine reaches a desired rotating speed, the lever-shaped engaging and disengaging member rotates against the energization on the basis of a centrifugal force, and the engagement between the engaging and disengaging pawl portion and the ratchet tooth of the second ratchet portion is automatically disconnected, and
• a side surface in a side facing to the ratchet tooth of the second ratchet portion of the lever-shaped engaging and disengaging member has a shape concaved in a direction opposite to the direction for energizing the engaging and disengaging pawl portion,
• wherein the first external operation and the second external operation are performed independently.