Automatic weight detecting device
First Claim
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1. A weight detecting device, comprising:
- a plate for receiving an object to be measured;
a rotatable shaft supporting said plate and movable a predetermined amount along a thrust axis of said rotatable shaft;
a leaf spring receiving and supporting a lower end of said rotatable shaft, said leaf spring movable in the direction of said thrust axis of said rotatable shaft at the point on said leaf spring supporting said lower end of said rotatable shaft, said leaf spring having opposite ends;
a support means for horizontally supporting said opposite ends of said leaf spring;
a load detecting means disposed below said leaf spring for detecting a composite load of said object on said plate, via said rotatable shaft and said leaft spring, and the stress on said leaf spring, and for outputting an electrical signal corresponding to said composite load; and
a weight detecting circuit for detecting the weight of said object from said electrical signal of said load detecting means.
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Abstract
An automatic weight detecting device is provided with a platform on which an object to be measured is placed, a supporting shaft for supporting the platform is rotatable and smoothly movable in the supporting direction. A driving motor rotates the supporting shaft, and an elastic member supports the supporting shaft. A load detecting device converts the load of the object, transmitted in the supporting direction of the rotatable supporting shaft through the elastic member into a given electrically physical amount and a weight detecting circuit integrates to obtain the average of the electrically physical amount while the shaft rotates, so that the weight of the object is detected.
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Citations
12 Claims
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1. A weight detecting device, comprising:
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a plate for receiving an object to be measured; a rotatable shaft supporting said plate and movable a predetermined amount along a thrust axis of said rotatable shaft; a leaf spring receiving and supporting a lower end of said rotatable shaft, said leaf spring movable in the direction of said thrust axis of said rotatable shaft at the point on said leaf spring supporting said lower end of said rotatable shaft, said leaf spring having opposite ends; a support means for horizontally supporting said opposite ends of said leaf spring; a load detecting means disposed below said leaf spring for detecting a composite load of said object on said plate, via said rotatable shaft and said leaft spring, and the stress on said leaf spring, and for outputting an electrical signal corresponding to said composite load; and a weight detecting circuit for detecting the weight of said object from said electrical signal of said load detecting means. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification