Summary "low cost single use injector" is an injection device (100, 200) including a safety guard (104, 204) and a housing (108, 208). the safety guard (104, 204) has a first end and a surface disposed at a second end thereof for contact with a patient's skin, and a protective flap (164, 240) extending from the same. the housing (108, 208) is slidably disposed relative to the security guard (104, 204) and includes a guide slot (172, 252) for engaging the guard flap (164, 240) to guide the movement of the housing (108, 208) relative to the security guard (104, 204). the guide groove (172, 252) has first (184, 256) and second (188, 260) axial parts and a substantially helical part (192, 264) that connects the first and second axial parts (184, 188, 256, 260). device (100, 200) also includes a medicine container (120, 220) connected to the housing (108, 208) and having a needle (124, 224) attached thereto in communication with a medicine disposed within the medicine container (120, 220). the medicament container (120, 220) is movable relative to the safety guard (104, 204) from an initial position to an injection position to a withdrawal position. the device (100, 200) additionally includes a biasing element (128, 228) which biases the medicine container (120, 220) away from the safety guard (104, 204) and an injector element (112, 212). ) slidably disposed relative to the medicament container (120, 220) to expel the medicament from the medicament container (120, 220).resumo “injetor de uso único de baixo custo” trata-se de um dispositivo de injeção (100, 200), que inclui um protetor de seguran-ça (104, 204) e um alojamento (108, 208). o protetor de segurança (104, 204) tem uma pri-meira extremidade e uma superfície disposta em uma segunda extremidade da mesma para o contato com uma pele do paciente, e uma aba de proteção (164, 240) que se estende a partir do mesmo. o alojamento (108, 208) é disposto de modo deslizante em relação ao pro-tetor de segurança (104, 204) e
