| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a syringe drive apparatus with a safety device for automatically adjusting a syringe internal pressure when the syringe has an internal pressure considerably higher than the atmospheric pressure. <P>SOLUTION: The syringe drive apparatus 10 includes a support portion 15 for supporting the piston 14 of a syringe 11, and an operation portion 19 for transmitting movement signals so as to push out or pull out the support portion 15. The support portion 15 has a free movement section forming portion for the free translation movement of the piston 14 for a certain section without being affected by a motor portion 17, a return signal for reversely rotating the motor portion 17 is transmitted so that the piston can perform the free translation movement by the free moving section forming portion when the operation portion 19 ends the transmission of the moving signal, and thus the piston is freely moved to automatically adjust the syringe internal pressure by the balance of the syringe internal pressure and the atmospheric pressure. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
