| 摘要 |
PROBLEM TO BE SOLVED: To provide a dispenser device which has excellent dispensation accuracy and in which piston friction can be reduced and lives of parts can be elongated. SOLUTION: In a dispenser device equipped with plural dispenser nozzles by which a liquid sample is sucked, the upper ends of pistons 5, moving up and down in plural cylinders 4a jointed to these dispenser nozzles 8, are connected by a piston head 6. Springs 17, as a buffer member for mitigating a shock at the time of moving a piston head 6 in the direction of puling out the pistons 5 from the cylinders 4a, are installed between the piston head 6 and the edges on the other side of each piston 5. Hereby, a shock at the time of starting a motor is mitigated, and inhalation of air caused by sudden suction is prevented to thereby secure dispensation accuracy, and besides, abnormal wear of sliding parts, caused by an error of working accuracy of the cylinders 4a or the piston head 6, can be prevented. |
