Auto injector with automatic needle retraction

The application relates a disposable to anal and automatic soil covering device (10), the injection device to operate automatic opening reliably for injection a dosage automatic the medicine, and with the shell (12), wherein the shell is a support: With the needle (20) injector (18), wherein the injector to locate and second positions of the first position movably, wherein the shell, wherein the first position; the needle is located in the shell, wherein the second position; the needle is supported with the shell prominently (12) is; And a driver, wherein the driver is constructed to a a power wherein the injector, so it is an injector from and first from the position with the second position; and driver is further square for when the user operation release component (42), exerted the power wherein the injector, thus covered with the injector from and second from the position of the child position, wherein a position; the needle is located in the shell.