| 摘要 |
The cord-type mowing machine is configured as follows: a body has a pillar; a reel is interpolated to the pillar; a ratchet wheel is interpolated to the pillar, and is stored inside the reel, and is rotated in a direction same as that of the reel; a ring is attached to the upper side of the reel; an upper cap is fixed to the upper end of the pillar; noreturn projections are successively formed on the undersurface of the upper cap; the ratchet wheel has a gathering pallet and is pressed toward the upper cap by a coil spring and the gathering pallet of the ratchet wheel is locked in a noreturn projection toward the letting-out direction of the cord; when the ratchet wheel falls due to a shock, locking between the gathering pallet and the noreturn projection is unlocked and the reel becomes rotatable in the letting out direction; the ring has an unlocking projection; when the ring is rotated in a winding direction, the gathering pallet climbs over the noreturn projection and the reel rotates in the winding direction; when the ring is rotated in the letting-out direction, the unlocking projection comes into contact with the gathering pallet; with the ratchet wheel pushed downward, the locking between the gathering pallet and the noreturn projection is unlocked and the reel becomes rotatable in the letting-out direction. |
| 主权项 |
1. A cord-type mowing machine comprising:
a body; a reel; a ratchet wheel; a ring; and an upper cap, wherein the body is approximately cylindrically shaped, with an upper side thereof opened and with a pillar provided at a center of a bottom face thereof, the reel is an object around which a cord is wound, and is approximately annulus ring shaped, and is extrapolated to the pillar, and is stored inside the body so as to be rotatable, the ratchet wheel is approximately annulus ring shaped, and is extrapolated to the pillar, and is stored inside the reel, and engages with the reel so as to be rotated in a direction same as that of the reel, the ring is attached to an upper side of the reel, and covers an upper end of the body, the upper cap is approximately disk shaped, and is fixed to an upper end of the pillar from an upper side of the ring, on an undersurface of the upper cap, noreturn projections are formed successively around the pillar, the ratchet wheel has a gathering pallet in an outer circumference part thereof, and is pressed toward the upper cap by a coil spring extrapolated to the pillar, and the gathering pallet of the ratchet wheel is locked in a noreturn projection toward a letting-out direction of the cord, when the ratchet wheel falls, due to a shock from the outside, against an energizing force of the coil spring, locking between the gathering pallet and the noreturn projection is unlocked and the reel becomes rotatable in the letting-out direction of the cord, the ring can rotate only by a predetermined angle relative to the reel, and an unlocking projection is provided at a position of an outer circumference side of the noreturn projection of the upper cap, when the ring is rotated in a winding direction, the gathering pallet of the ratchet wheel climbs over the noreturn projection against the energizing force of the coil spring, and the reel rotates in the winding direction of the cord, when the ring is rotated in the letting-out direction of the cord, the unlocking projection of the ring comes into contact with the gathering pallet of the ratchet wheel, and with the ratchet wheel pushed downward against the energizing force of the coil spring, the locking between the gathering pallet and the noreturn projection is unlocked and the reel becomes rotatable in the letting-out direction of the cord. |
