Jumping mechanism

Machine element or mechanism – Mechanical movements – Rotary to intermittent unidirectional motion

Patent

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Details

446312, F16H 2704, A63H 1302

Patent

active

052791700

ABSTRACT:
A jumping mechanism includes a support frame and a swing arm pivoted to the support frame. A U-shaped leg has a pair of vertically extending parts which are mounted pivotally to the swing arm. The support frame is movable relative to the vertically extending parts in a vertical direction. A jumping control unit has a rotary cam plate which is mounted on the support frame and which rotates in a predetermined direction. The cam plate is disposed below and has a periphery which abuts with an outward projection of the swing arm. One end of a tension spring is hooked to an upper rear end of the swing arm, while the other end thereof is hooked to an upper front end of the support frame. Rotation of the cam plate initially causes the cam plate to urge the outward projection upward so as to cause the swing arm to pivot upwardly from a first position relative to the support frame. Pivoting movement of the swing arm causes the tension spring to stretch and further causes the support frame to move vertically downward relative to the U-shaped leg. Further rotation of the cam plate eventually causes the cam plate to cease upward urging of the outward projection, thereby causing the tension spring to contract instantaneously. The swing arm pivots instantaneously back to the first position and lifts the U-shaped leg so as to enable the jumping mechanism to execute a jumping movement.

REFERENCES:
patent: 2253183 (1941-08-01), Le Count
patent: 3452613 (1969-07-01), Steinke
patent: 4308686 (1982-01-01), Ikeda

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