Lancet for blood collection and puncture needle unit
First Claim
1. A lancet for puncturing a human body to collect bodily fluids from the human body, comprising:
- a puncture needle;
a slider which is able to hold said puncture needle at one end, and is reversibly slidable in a linear direction so that a puncture operation by said puncture needle is carried out;
a cam ring which is flat-shaped and rotatable about an axis thereof, has a cam groove that is engaged with a cam follower provided on the slider within a rotation plane of the cam ring, and slides the slider by the rotation of the cam ring;
an elastic force application member for applying a rotation force in a predetermined direction to the cam ring to slide the slider in a puncture direction;
a stopper arm for stopping the rotation of the cam ring to which a force is applied by the elastic force application member, or releasing the stopping; and
an anti-reverse-rotation mechanism which is implemented by a ratchet mechanism for preventing reverse rotation of the cam ring after the puncture operation.
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0 Petitions
Accused Products
Abstract
A lancet having a slider with a puncture needle holding mechanism at one end thereof, and having a cam ring with a continuous cam groove, rotatable about a support shaft, and with a cam ring claw and an anti-return claw restricting the rotation. The lancet also having a ring spring applying a force to rotate the cam ring, having a rotatable stopper arm holding and releasing the rotation of the cam ring, and having a rotatable ratchet restricting the direction of rotation of the cam ring. A puncture needle unit including a puncture needle body integrally molded with a protrusion fitted to the lancet, a rotation stop rib, a puncture needle, and a puncture needle cap lightly pressed into the puncture needle body.
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Citations
14 Claims
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1. A lancet for puncturing a human body to collect bodily fluids from the human body, comprising:
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a puncture needle; a slider which is able to hold said puncture needle at one end, and is reversibly slidable in a linear direction so that a puncture operation by said puncture needle is carried out; a cam ring which is flat-shaped and rotatable about an axis thereof, has a cam groove that is engaged with a cam follower provided on the slider within a rotation plane of the cam ring, and slides the slider by the rotation of the cam ring; an elastic force application member for applying a rotation force in a predetermined direction to the cam ring to slide the slider in a puncture direction; a stopper arm for stopping the rotation of the cam ring to which a force is applied by the elastic force application member, or releasing the stopping; and an anti-reverse-rotation mechanism which is implemented by a ratchet mechanism for preventing reverse rotation of the cam ring after the puncture operation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification