Patent ID: 8849378

Claim:
A chemical liquid injector for operating a syringe, the syringe comprising a cylinder with a flange and a piston, the injector comprising: an injection head on which a syringe adapter is exchangeably mounted, the injection head comprising an upward-opening adapter receiving concave portion configured to receive a syringe in which the flange receiving member is inserted to mount the syringe with the syringe adapter interposed, and a piston driving mechanism configured to operate a piston of the syringe mounted with the syringe adapter interposed; and a syringe adapter comprising a flange receiving member configured to removably receive a flange of the syringe, the adapter positioned in the adapter receiving portion to secure the syringe to the injection head, wherein, in the syringe adapter, the flange receiving member comprises a pair of elastic arm portions extending in parallel from each end of the flange receiving member, the arm portions being configured to releasably secure the flange of the syringe received in the flange receiving member, the arm portions being supported to be elastically displaceable so that an interval between the arm portions can be changed.