| 摘要 |
<p>The invention concerns a device for locking a dental instrument characterized in that it consists of: a rotating spindle (4), formed by a hollow spindle (8), adapted to receive the head of an instrument; a locking spring (5) formed by a lower ring (21) extending on a common side by two branches, or a plurality of elastic branches, each provided with a pin engaged in an annular groove (20) provided in the head of the instrument; a push-button (6) including in its underside a central conical pressure head (33) adapted to space apart radially the branches of the locking spring (5) to release the pins (28, 29) from the annular groove of the instrument. Further, the locking branches are housed in the slots provided in the rotary spindle to lock in rotation the spring relative to the rotary spindle, the spring being moreover maintained axially between the push-button and a shoulder of the rotary spindle.</p> |
