Single use shieldable hypodermic syringe with a reusable handle

Syringe of the type with an injection needle (15) for single use, notably for dentistry and comprising:

• a syringe handle (1) having a plunger (6) and a support piece (2, 3) traversed by said plunger and movable along the plunger,
• a syringe body (11) provided at one of its ends with a base (14) carrying the injection needle (15) so as to define an active injection portion,
• a removable attachment means (4, 5, 16, 19) for attaching the syringe body (11) to the syringe handle (1),
• and a protective case (12) of a form adapted to shield the needle (15) and its base (14), said syringe being characterized in that:
• the means for removable attachment comprises:
• a tubular adapter (16) engagable to the syringe body (11) opposite the base (14), and provided with a fitting structure (19),
• a sleeve (4) integral with the support piece (2, 3) of the handle (1) so as to be traversed by the plunger (6), and provided with a fitting structure (5) matching that of the tubular adapter (16) of the syringe body (11), said tubular adapter (16) and sleeve (4) being of forms adapted to be able to penetrate one into the other so as to come into a fitted position where their fitting structures (5, 19) cooperate,
• the protective case (12) is tubular and has a diameter adapted to be able to slide externally along the syringe body (11), with a locking section (22) able to cap the tubular adapter (16) and the sleeve (4) of the syringe body (11) and handle (1), and to lock them in their fitted position,
• the protective case (12) and the syringe body (11) are provided with stop means (18, 21, 23) adapted to define two end positions;
• a forward position where the case (12) completely covers the needle (15) and the base (14), and a rear position where at least the active portion of the needle (15) is exposed and where the locking section (22) of the case (12) caps the fitted tubular adapter (16) and sleeve (4) of the syringe body (11) and handle (1) so as to ensure a locking of the syringe body/syringe handle union.