| 摘要 |
PROBLEM TO BE SOLVED: To provide a calibrating weight device for an electronic balance that is compact and freely applicable to various devices and also have a driving source with few influence to a reference value to be decided and a weighing result. SOLUTION: The calibrating weight device includes a calibrating weight that is connected to a force measurement cell 6. The calibrating weight 14 is moved vertically, by a conveyance mechanism and a driving source 118, not only to achieve the force transmitting contact between the weight 14 and the measurement cell 6 but also to release the force transmitting contact. The conveyance mechanism includes at least one reset member 122 and a lifting device 100 that is formed as a knee joint linkage 117, in which a first stable state defines a calibration position 132, and an actuator 118 provides power only when the conveyance mechanism is moved, by feedback from a multi-position stabilizing positioning member 115 for which a second stable state defines a reset position of the conveyance mechanism. COPYRIGHT: (C)2007,JPO&INPIT
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