Device for delivering therapeutic fluid

A therapeutic agent delivery system (10) includes a housing (16) and a drive wheel (38) rotatably carried by the housing. The plunger rod (50) may rotate with the drive wheel relative to the housing from a first rotational configuration to a second rotational configuration. The plunger rod can be translated relative to the housing from a first translated configuration to a second translated configuration. A plunger limiter (58) may hold the plunger rod in the first translated configuration when the plunger rod is disposed in the first rotational configuration. The plunger restrictor may allow the plunger rod to translate to a second translated configuration when the plunger rod is disposed in the second rotational configuration. The plunger rod may move the needle from the concealed configuration to the extended configuration when the plunger rod is moved from the first translated configuration to the second translated configuration. 一种治疗剂输送系统(10)，包括壳体(16)和由壳体可旋转地承载的驱动轮(38)。柱塞杆(50)可以与驱动轮一起相对于壳体从第一旋转构型旋转到第二旋转构