Safety injection needle assembly

A safety injection needle assembly (100), said safety injection needle assembly (100) comprising:

• an injection needle (110) affixed to a hub (120), wherein said hub (120) having a stud (130) and a receiving means (140) for receiving a syringe, and said hub (120) is affixed to a proximal end of an injection site of said injection needle (110);
• an inner sheath (150) having a slit (190) for receiving said stud (130), thereby positioning and retaining said injection needle (110) within said inner sheath (150);
• and
• an outer sheath (220) and a cap (240) for housing said inner sheath (150), wherein said inner sheath (150) houses said injection needle (110);
• characterized in that;
• said inner sheath (150) having a pair of outer studs (170);
• said outer sheath (220) having an outer sheath inlet (230) and said cap (240) comprises a cap inlet (250), wherein said inlets configured to complement and removably engage with said pair of outer studs (170), thereby locking said inner sheath (150) with said outer sheath (220);
• and
• said slit (190) of said inner sheath (150) having a plurality of terminal ends (200a, 200b, 200c) for receiving said stud (130), thereby positioning said injection needle (110) and locking said stud (130) to retain said injection needle (110);
• said outer sheath inlet (230) and said cap inlet (250) are separately and independently engageable with said inner sheath (150), each of said outer sheath inlet (230) and said cap inlet (250) independently comprising a temporary locking means (210a) and a permanent locking means (210b)
• wherein engagement of said temporary locking means (210a) provides a releasable locking position, and engagement of said permanent locking means (210b) provides an irreversible end-use locking position, such that each of the outer sheath (220) and the cap (240) is selectively lockable to the same pair of outer studs (170) of said inner sheath (150).