| 摘要 |
A right angle safety needle (32) has a base (4) to which an arm (34) is hingedly mounted at a proximal portion. The base (4) has an opening (18) at its distal portion wherethrough the vertical portion of the right angle needle (32) extends. A well (20) is formed adjacent the opening (18) and a dam (22) is provided on the side of the well (20) away from the opening (18). To retract the needle (32) from the opening (18), the horizontal portion (26) of the needle (32), which may be encased in an arm (34), is rotated about the upright (56) to which it is hingedly connected so that the needle (32) is pivoted upwards and withdrawn from the opening (18). Once the tip of the needle (32) clears the opening (18), due to the tip of the needle (32) being offset from the body of the needle (32) and the fact that the needle (32) tends to flex forward, the tip of the needle (32) is entrapped in the well (20) adjacent to the opening (18). The dam (22) forward of the well (20) provides a backstop for any further forward movement of the tip of the needle (32), thereby fixedly retaining the needle (32) within the well (20). Stops (68) are provided in the device, at its arm (34) and base (4), to prevent the needle (32) from being further moved relative to the base (4) once the tip of the needle (32) is entrapped in the well (20) of the base (4).
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