1. An injection device, actuable by a torsion spring provided with a mechanism for reducing the previously selected dose and comprising a torsion spring (2) able to twist during dose setting relative to the housing in a first direction by rotation of proximally located button (30) and the dose to unwind when rotated in the same button (30) of the dose in a second direction opposite the first direction, wherein the dose reduction mechanism comprises: - the locking element (1), coupled to the housing and equipped with a toothing (6), and- ratchet (20) which has at least one ratchet portion (22) provided in engagement with the locking element (1) and operatively coupled to the button (30) of the dose, wherein at least a ratchet portion (22) brought into engagement with the toothing (6) the locking element (1) and is configured to prevent rotation of the ratchet wheel (20) relative to the locking element (1) in the second direction when the ratchet portion (22) is in engagement with toothing (6) Pull-e ementa (1) and the button (30) of the dose is arranged to during its rotation in a second direction directly enter into engagement with at least one ratchet portion (22), thereby releasing the at least one ratchet portion (22) of the toothed crown (6) the locking element (1) and allowing the ratchet wheel (20) under the action of the torsion spring (2) to turn relative to the locking element (1) in the second napravlenii.2. The apparatus of Claim. 1, wherein the locking element (1) is rigidly attached to korpusu.3. The apparatus of claim. 1, wherein the locking element (1) is associated with the housing with the possibility of releasing1. Инъекционное устройство, приводимое в действие торсионной пружиной, снабженное механизмом уменьшения ранее выбранной дозы и содержащее торсионную пружину (2), способную закручиваться во время установки дозы относительно корпуса в первом направлении посредством поворота проксимально расположенной кнопки (30) установки дозы и раскручиватьс
