Lever-arm displacement-increasing device

Abstract

In a lever-arm displacement-increasing device, two lever arms are joined at one end. The other end of one of the lever arms is connected to a fixed portion that supports the rear end of an actuator element, and the other end of the other lever arm is connected to a rigid connecting portion connected to the front end of the actuator element. The displacement force of the actuator element is transmitted to the lever arms through the connecting portion, and is further transmitted to a joint between the lever arms. The joint functions as an output displacing portion. The joint changes the displacing direction of the actuator element to a direction orthogonal thereto, and produces a displacement larger than the displacement of the actuator element.

1 . A lever-arm displacement-increasing device comprising: 
 an actuator element;    a first lever arm connected at one end to the actuator element by a connecting portion; and    a second lever arm joined at one end to the other end of the first lever arm by a junction,    wherein the displacing direction of the junction is orthogonal to the displacing direction of the actuator element.    
   
   
       2 . The lever-arm displacement-increasing device according to  claim 1 , wherein a fulcrum is provided at the other end of the second lever arm, and is fixed offset from the connecting portion toward the actuator element.  
   
   
       3 . The lever-arm displacement-increasing device according to  claim 1 , wherein the junction functions as a displacing portion.  
   
   
       4 . The lever-arm displacement-increasing device according to  claim 1 , wherein a displacing portion protrudes from the joint.  
   
   
       5 . The lever-arm displacement-increasing device according to  claim 1 , wherein the first lever arm and the second lever arm are parallel to each other.  
   
   
       6 . The lever-arm displacement-increasing device according to  claim 1 , wherein a plurality of units each including the first lever arm, the second lever arm, and the junction are provided.  
   
   
       7 . A lever-arm displacement-increasing device comprising: 
 an actuator element;    a fixed portion for fixing a rear end of the actuator element;    a first lever arm connected at one end to a front end of the actuator element by a connecting portion;    a second lever arm connected at one end to a fulcrum; and    a junction for joining the other end of the first lever arm and the other end of the second lever arm,    wherein the displacing direction of the junction is orthogonal to the displacing direction of the actuator element.    
   
   
       8 . The lever-arm displacement-increasing device according to  claim 7 , wherein the fulcrum is fixed offset from the connecting portion toward the actuator element.  
   
   
       9 . The lever-arm displacement-increasing device according to  claim 7 , wherein the junction functions as a displacing portion.  
   
   
       10 . The lever-arm displacement-increasing device according to  claim 7 , wherein a displacing portion protrudes from the joint.  
   
   
       11 . The lever-arm displacement-increasing device according to  claim 7 , wherein the fulcrum is fixed to the fixed portion.  
   
   
       12 . The lever-arm displacement-increasing device according to  claim 7 , wherein the first lever arm and the second lever arm are parallel to each other.  
   
   
       13 . The lever-arm displacement-increasing device according to  claim 7 , wherein a plurality of units each including the first lever arm, the second lever arm, and the junction are provided.