Patent ID: 11933663
Assignee: METTLER TOLEDO INSTRUMENT (SHANGHAI) COMPANY LIMITED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. An internal calibration mechanism of a weigh module having a load-receiving portion, a fixing portion, a parallel guide portion, and a lever, the mechanism comprising:
an internal calibration driving structure;
an internal calibration weight; and
an internal calibration weight support frame that is symmetrically arranged at a left and right side of the load-receiving portion and connected at a connecting portion to the load receiving portion such that:
an opening or groove, configured for loading the internal calibration weight, is provided on a side of the internal calibration weight support frame that faces away from the fixing portion, the opening or the groove arranged for loading the internal calibration weight; and
the internal calibration driving structure is arranged for lifting the internal calibration weight away from the internal calibration weight support frame or for placing the internal calibration weight in the opening or the groove;

joints having a thin sheet structure that directly connect the internal calibration weight support frame to the left and right side of the load receiving portion at the connecting portion; and
joints having a thin sheet structure that directly connect the internal calibration weight support frame to an extending portion of the fixing portion that extends towards the load-receiving portion at a fulcrum connecting portion connected to the fixing portion;
wherein the internal calibration weight support frame, the load-receiving portion and the fixing portion are integrally formed;
wherein the joints form part of a force transmission pathway for the internal calibration weight when the internal calibration weight is placed in the opening or the groove, said force transmission pathway extending between the opening or the groove, the extending portion of the fixing portion, and the load-receiving portion.