| 摘要 |
A dual hand control actuation mechanism for a manually actuated device has a pair of opposed actuating rods that have wedge shaped ends defining forward and rearward camming surfaces to interact with forward and rearward cam surfaces on a cam member positioned between the actuating rods. If both of the actuating rods are pushed simultaneously, their forward cam surfaces engage the rearward cam surfaces of the cam member and move the cam member to cause it to engage a switch to actuate the device. If one of the actuating rods is pushed before the other, its forward camming surface engages the rearward camming surface on the cam member and pivots the cam member preventing the other actuating member from engaging the cam member in a manner that will move the cam member against the switch, thereby preventing actuation of the device.
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