| 摘要 |
The functional portion of the instrument includes a pin and lever assembly. One end of the pin is received in an opening in the handle. The other end of the pin is bent into a "U" shape to form a plunger. The lever, which carries a cylinder, is mounted on and moveable relative to the pin. As the lever is moved relative to the pin, the plunger moves within the cylinder to dispense the amalgam. The lever is held on the pin by a bias spring which extends from the handle. A flexible element within the handle normally engages the pin end to retain the assembly on the handle. Depression of a button on the exterior of the handle causes the internal element to flex to disengage the pin end. The assembly may then be easily removed from the handle as a unit by disengaging the bias spring from the lever. This facilitates thorough cleaning of all parts of the instrument and reassembly thereof.
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