| 摘要 |
<p>There is disclosed a dental handpiece having a bur-receiving chuck (20) with spring jaws (24) which exert a strong clamping force on the shank of a bur (22) for operatively securing the bur (22) to the handpiece rotor, such handpiece also having a lever-actuated bur release mechanism (30, 31, 36) for forcing the jaws apart when removal and replacement of a bur (22) is desired. A force-multiplying control lever (36) for camming open the clamping jaws (24) is an integrated part of the handpiece assembly and may be rotatably positioned about the head (12) of the handpiece into any location most convenient for user operation.</p> |
