| 摘要 |
An injection device (210; 110) is provided that includes a housing (212; 112) adapted to receive a syringe (214; 114) that is movable between a retracted position, in which its needle (218; 118) is contained within the housing, and an extended position, in which its needle (218; 118) extends from the housing (212; 112) through an exit aperture (228; 128). The device (210; 110) includes a drive (230, 231, 232, 234; 130, 131, 132, 134) that acts upon the syringe (214; 114) to advance it from its retracted position to its extended position and to discharge its contents through its needle (218; 118). A syringe carrier (222; 122) is advanced with the syringe (214; 114) and a sleeve (219; 119) restrains the advancement of the syringe carrier (222; 122) as the syringe (214; 114) reaches its extended position. A damping element (225; 125) acts between the syringe carrier (222; 122) and the sleeve (219; 119) to cushion the impact as they come into contact, thereby reducing the transmission of energy from the impact to the components of the drive (230, 231, 232, 234; 130, 131, 132, 134) and preventing their fracture. The damping element (225; 125) also reduces the noise, which may be distressing to a user of the device (210; 110), produced when the syringe carrier (222; 122) and the sleeve (219; 119) come into contact and reduces the pain suffered by a user upon operation of the device (210; 110). |
