Needle assembly
AssigneeTerumo Kabushiki Kaisha
InventorsKentaro NAKAJIMA, Yoichiro IWASE
Life of this patent
Estimating the term…
Abstract
A needle assembly is disclosed, which includes a needle protection member and a rotor. The rotor has a rotor body and a restriction portion. When the needle protection member in the initial state is displaced from the protection position to a use position and returns to a protection position, the restriction portion is displaced from the initial position to the lock position by the rotation of the rotor body with respect to the needle protection member. A needle hub has a displacement prevention portion that prevents the needle protection member from being displaced from the protection position to the use position again by contacting the restriction portion at the lock position.
Claims19
A needle assembly for injecting a drug intradermally, the needle assembly comprising;
- a tubular needle that includes a needle tip;
- a needle hub supporting the tubular needle;
- a displaceable needle protection member provided on the needle hub along an axial direction of the tubular needle;
- a rotor provided at a proximal end of the needle protection member, the rotor includes a rotor body and a restriction portion, the restriction portion being provided on the rotor body, and wherein the restriction portion is displaced from an initial position to a lock position by the rotor body rotating with respect to the needle protection member;
- and
- wherein the needle hub includes a displacement prevention portion configured to prevent the needle protection member from being re-displaced by contacting the restriction portion at the lock position.
A needle assembly for injecting a drug intradermally, the needle assembly comprising:
- a tubular needle that includes a needle tip;
- a needle hub supporting the tubular needle;
- a needle protection member displaceably provided on the needle hub along an axial direction of the tubular needle;
- a rotor provided at a proximal end of the needle protection member;
- an urging member provided on the needle hub to urge the rotor and the needle protection member toward a distal direction of the tubular needle;
- the needle protection member is located at a use position at which the needle tip is exposed when displaced in a proximal direction of the tubular needle from a protection position at which the needle tip is covered;
- the rotor includes a rotor body and a restriction portion, the restriction portion being provided on the rotor body, and wherein the restriction portion is displaced from an initial position to a lock position by the rotor body rotating with respect to the needle protection member when the needle protection member in an initial state is displaced from the protection position to the use position and returns to the protection position;
- and
- wherein the needle hub is provided with a displacement prevention portion configured to prevent the needle protection member from being re-displaced from the protection position to the use position by contacting the restriction portion at the lock position.
Dependencies are inferred from the claim text.