Weighing scales – Self-positioning – Electrical current generating or modifying
Patent
1995-07-03
1998-03-03
Gellner, Michael L.
Weighing scales
Self-positioning
Electrical current generating or modifying
177229, G01G 314, G01G 308
Patent
active
057238260
ABSTRACT:
A load cell unit in accordance with the present invention comprises a load cell and a wiring board. The load cell comprises a flexible member provided with a through hole formed between the fixed end and the moving end thereof so as to form four flexible portions, and strain gages attached to the flexible portions, respectively. The wiring board is provided with a circuit connected to the strain gages of the load cell so as to form a bridge circuit including the strain gages, and a processing circuit connected to the bridge circuit. The wiring board has a first major surface mounted with at least film capacitors among the circuit elements of the processing circuit, and a second major surface. A first shield cover is attached to the first major surface of the wiring board so as to cover the circuit elements mounted on the first major surface, and a second shield cover is attached to the second major surface of the wiring board so as to cover the circuit elements mounted on the second major surface of the wiring board. The wiring board is disposed beside the load cell with the first shield cover disposed in the through hole of the load cell. The wiring board of the load cell unit is shielded effectively and the load cell unit has a compact construction.
REFERENCES:
patent: 3867759 (1975-02-01), Siefker
patent: 4146291 (1979-03-01), Goff et al.
patent: 5353201 (1994-10-01), Maeda
JP 63-52026, Mar. 5, 1988 English Abstract.
JP 63-52025, Mar. 5, 1988 English Abstract.
Kitagawa Tohru
Nishiyama Yoshihisa
Takabayashi Shuji
Gellner Michael L.
Hayes Michael J.
Kabushiki Kaisha TEC
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