Patent ID: 8853568

Claim:
A platform scale for weighing an object to be weighed by supporting it with one or a plurality of load detection section characterized in that the load detection section comprises: a load sensor including a tuning fork vibrator and a block body coupled to the tuning fork vibrator for transmitting an applied load by reducing the load; a circuit board mounting thereon circuitry for converting a signal from the tuning fork vibrator into a digital signal; and a sensor case for accommodating the load sensor and the circuit board; wherein the sensor case is made of casting stainless material by a lost wax process and is directly coupled to parallel base frames in a manner to maintain the distance between the base frames, wherein said sensor case and said parallel base frames together form a substantially rigid base, with said sensor case having sufficient rigidity to serve as a structural member for maintaining the distance between the base frames; wherein the sensor case comprises a load sensor chamber for containing the load sensor, a circuit board chamber for containing the circuit board and an isolation wall for preventing air flow between the load sensor chamber and the circuit board chamber and ventilation of the load sensor chamber is carried out only through an air hole in the bottom of the load sensor chamber.