Safety needle

A needle and body technology, applied in the field of improved safety injection needles, can solve the problems of difficult assembly of safety injection needles, fragile guide rails and locking mechanisms, and difficulty in molding collars, etc., and achieves robust design, easy assembly, and reduced assembly. effect of difficulty
CN1819852AInactive Publication Date: 2006-08-16NMT GRP PLC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NMT GRP PLC
Publication Date
2006-08-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A safety needle (20) for use with a syringe including a casing (30) in which a needle (28) for injections or blood drawing is mounted. A sleeve (22) is slidably mounted in the casing (30). The sleeve (22) is biased by a spring (42) into a partially extended position, exposing only the sharp tip (26) of the needle. As the needle (28) is inserted into a patient, the sleeve (22) retracts into the casing. When the needle (28) is removed, the sleeve (22) returns to a fully extended position and by operation of a locking mechanism locks into place. The locking mechanism includes a plurality of fingers (62), at least one of which has a projection (64) formed thereon. The projection (64) travels along a track system (66) integrally formed in the inner wall (56) of the casing (30) to move from the initial sleeve position to the retracted position and then back to a locked position in which contact with the used needle (28) and reuse of the safety needle (20) is prevented.
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Description

technical field

[0001] The present invention relates to an improved safety injection needle for use with a syringe and its accessories. Background technique

[0002] In the medical industry, injection devices such as syringes and needles are used every day. Safety precautions should be taken to protect users, phlebotomists, nurses, doctors, or medical technicians from being stuck with used needles and to prevent possible transmission of blood-related diseases. Additionally, precautions must be taken to avoid the same needle being used more than once.

[0003] The prior art has provided safety injection needles comprising a slidable sleeve surrounding the needle, such as described in US Patents 4,813,940 and 5,104,384, assigned to the assignee of the present invention. A sleeve covers the shaft of the needle, leaving the tip of the needle exposed prior to use. When the needle is inserted into a patient, the cannula contacts the patient and retracts into the safety needle s...

Claims

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