Needle protection device for a medical injection unit having a needle protection sleeve, protection spring and push switch activation element that moves the sleeve against the spring force to unlock it

摘要

Needle protection device for an injection unit has a needle protection sleeve (1), a needle protection spring (2) and an activation element (3) with which the needle protection sleeve can be released. The activation element and the needle protection spring are arranged so that activation element must be moved against the force applied by the needle protection spring in order to unlock the protection sleeve. The invention also relates to an injection device with an inventive needle protection device and a method for releasing or unlocking a needle protection device of an injection device.