Thermal bend actuator for a micro electro-mechanical device

B - Operations – Transporting – 81 – B

Patent

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B81B 3/00 (2006.01) B41J 2/045 (2006.01) B41J 2/14 (2006.01) B81B 7/02 (2006.01)

Patent

CA 2414736

Thermal bend actuator (28) has two spaced arms (31, 32) which are connected via rod elements (102). The rod elements (102) are themselves connected via torsion bars (110, 112, 114, 116, 118). One arm (32) is conductively heatable to cause bending of the actuator (28) on the application of an electrical current. The rod elements (102) and torsion bars (110, 112, 114, 116, 118) reduce the likelihood of unwanted bending modes taking place that could cause improper movement of the actuator (28). The actuator (28) may be used for moving an ink displacing paddle in the nozzle chamber of an ink jet device.

L'invention concerne un actionneur à flexion thermique (28) comprenant deux bras espacés (31, 32) reliés au moyen de tiges (102). Ces tiges (102) sont elles-mêmes reliées au moyen de barres de torsion (110, 112, 114, 116, 118). Un bras (32) peut être chauffé par conduction de manière à entraîner une flexion de l'actionneur (28) lorsqu'un courant électrique est appliqué. Les tiges (102) et les barres de torsion (110, 112, 114, 116, 118) diminuent la probabilité de survenue de modes de flexion non souhaités qui pourraient entraîner un mouvement inadéquat de l'actionneur (28). Cet actionneur (28) peut servir à déplacer une palette de déplacement de l'encre dans la chambre de gicleur d'un dispositif à jet d'encre.

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