| CPC A61C 8/0089 (2013.01) [B25B 13/463 (2013.01); B25B 23/1427 (2013.01)] | 20 Claims |
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1. A torque wrench as a ratchet instrument for medical technology, the torque wrench comprising:
a head region including a receptacle opening,
a neck region which adjoins the head region,
a bar-shaped activation lever for applying a torque to the head region, the bar-shaped activation lever being fastened to the neck region and extending at least approximately in one plane,
a bezel which forms the receptacle opening of the head region and defines a rotation axis that runs so as to be at least approximately orthogonal to the plane, the bezel being configured to receive a driver instrument in a direction extending along the rotation axis, and
a spring bracket and a latching cam which is arranged on the spring bracket, wherein:
in a resting position of said latching cam, the latching cam protrudes into the receptacle opening,
the latching cam includes an entrainment portion that is configured to interact with a mating face of the driver instrument so as to transmit a torque to the driver instrument by way of entrainment when the driver instrument is inserted in the receptacle opening, and when the activation lever is rotated in a tightening direction in an entraining position of the latching cam,
the latching cam, when rotating counter to the tightening direction, is configured to move counter to a force of the spring bracket to a releasing position, so as to form a freewheeling mechanism between the head region and the driver instrument,
the bezel includes a cutout running across an entire cross section of the bezel and forms the spring bracket, and
the spring bracket includes a recess on a side of the spring bracket that faces the rotation axis, and, when viewed in the tightening direction, the recess leads an entrainment face of the entrainment portion and adjoins the entrainment face.
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