Device for inserting a needle for dispensing a product in a site

A device for inserting a needle into a site, comprising:

• a support wall on the site,
• a receiving body having a guiding housing,
• a needle housing, on which an insertion needle is mounted, movably mounted in the guiding housing between
• a pre-insertion position in which the needle is retracted with respect to the support wall,
• at least one insertion position in which the needle protrudes with respect to the support wall, and
• at least one retracted position, in which the needle is again retracted with respect to the support wall,
• a first return member, configured to be stressed when the needle housing is in the pre-insertion position and to drive the needle housing from the pre-insertion position to the at least one insertion position in released state,
• a second return member, configured to be stressed when the needle housing is in the pre-insertion position and in the at least one insertion position and to drive the needle housing from the at least one insertion position to the at least one retracted position in released state,
• a catheter movably mounted with respect to the needle and a catheter holder configured to move the catheter with the needle when the needle housing moves from the pre-insertion position to the at least one insertion position and to separate the catheter from the needle so that the catheter movement remains locked when the needle housing moves from the at least one insertion position to the at least one retracted position, and
• a first rod movably mounted in rotation about an axis of rotation (R) in a first rod housing of the receiving body, the axis of rotation (R) being parallel to a guiding axis (G) of the guiding housing receiving the needle housing,
• the catheter holder and the first rod comprising a first releasable blocking member which, when released, allows the needle housing to move from the pre-insertion position to the at least one insertion position.