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2. 发明公开

EP1232731A1 Dental handpiece having improved bur release means 有权
标题翻译： ZahnärztlichesHandstückmit verbesserter Spannvorrichtung
公开(公告)号：EP1232731A1
公开(公告)日：2002-08-21
申请号：EP01103883.3
申请日：2001-02-16
申请人： Bowen, Stanley A.
发明人： Bowen, Stanley A.
IPC分类号： A61C1/14
CPC分类号： A61C1/144 , A61C1/14
摘要： A dental handpiece (1) to releasably retain a workpiece (e.g. a dental bur) (50) that is used to treat the teeth of a patient. The workpiece (1) is clamped within a hollow collet (4) between a pair of flexible clamping fingers (38) having a spring-like memory. A collet actuator (9) is arranged in spaced axial alignment with the collet (4). Both the collet (4) and collet actuator (9) are surrounded by a cylindrical spindle (14). An axial pushing force applied to a push-button (8) of the handpiece (1) causes the collet actuator (9) to slide through the spindle (14) towards the collet (4). A pair of wedge-shaped tips (32) having an angle of preferably 22 degrees are carried by the collet actuator (9) into the hollow collet (4) to stress the pair of flexible clamping fingers (38) thereof. Accordingly, the clamping fingers (38) are rotated outwardly and away from one another through a stroke gap (42) so as to be moved into contact with the spindle (14), whereby the workpiece (50) is released for removal from the collet (4).
摘要翻译：一种用于可释放地保持用于治疗患者牙齿的工件（例如牙科钻头）（50）的牙齿手柄（1）。工件（1）夹在具有弹簧状存储器的一对柔性夹紧指（38）之间的中空夹头（4）内。夹头致动器（9）以与夹头（4）间隔开的轴向对准地布置。夹头（4）和夹头致动器（9）都被圆柱形主轴（14）围绕。施加到手持件（1）的按钮（8）的轴向推力使得夹头致动器（9）朝着夹头（4）滑过主轴（14）。具有优选22度的角度的一对楔形尖端（32）由夹头致动器（9）承载到中空夹头（4）中以对其一对柔性夹紧指（38）施加应力。因此，夹持指（38）通过行程间隙（42）向外转动并远离彼此移动以与主轴（14）接触，由此工件（50）被释放以从夹头（4）。

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