Piezoelectric mechanism for converting weight into frequency
First Claim
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1. A mechanism for converting a weight into a frequency comprising:
- a tuning fork vibrator including a pair of elongated plate-like vibrating strips extending in parallel with each other and a pair of bridging portions for coupling the vibrating strips with each other at their both ends, a natural resonance frequency of the tuning fork vibrator being changed in response to the weight applied there to in an axial direction of the tuning fork vibrator;
a lever unit having a power pivot, a load pivot and a fulcrum pivot;
a base portion having major surfaces extending in the axial direction of the tuning fork vibrator and connected to the fulcrum pivot of the lever unit;
a first plate-like portion for coupling one of the bridging portions with the power pivot of the lever unit;
a second plate-like portion for coupling the other bridging portion with the base portion; and
a third plate-like portion for coupling the load pivot with a weight receiving portion to which the weight to be converted is applied;
wherein all of said tuning fork vibrator, lever unit, base portion, first, second and third thin plate-like portions are formed integrally from a single plate in such a manner that the elongated plate-like vibrating strips extend perpendicularly to a major surface of said plate.
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Abstract
A mechanism for converting a weight into a frequency by means of a tuning fork vibrator having a pair of elongated plate-like vibrating strips extending in parallel with each other, a lever unit with a power pivot, fulcrum pivot and a load pivot, and a base portion, both ends of the tuning fork vibrator being coupled with the power pivot of the lever unit and the base portion, respectively by means of thin plate-like members. The weight to be converted is applied to the load pivot of the lever unit and is transferred to the tuning fork vibrator by means of the lever unit. All the parts of the mechanism are formed integrally from a single plate.
20 Citations
8 Claims
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1. A mechanism for converting a weight into a frequency comprising:
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a tuning fork vibrator including a pair of elongated plate-like vibrating strips extending in parallel with each other and a pair of bridging portions for coupling the vibrating strips with each other at their both ends, a natural resonance frequency of the tuning fork vibrator being changed in response to the weight applied there to in an axial direction of the tuning fork vibrator; a lever unit having a power pivot, a load pivot and a fulcrum pivot; a base portion having major surfaces extending in the axial direction of the tuning fork vibrator and connected to the fulcrum pivot of the lever unit; a first plate-like portion for coupling one of the bridging portions with the power pivot of the lever unit; a second plate-like portion for coupling the other bridging portion with the base portion; and a third plate-like portion for coupling the load pivot with a weight receiving portion to which the weight to be converted is applied;
wherein all of said tuning fork vibrator, lever unit, base portion, first, second and third thin plate-like portions are formed integrally from a single plate in such a manner that the elongated plate-like vibrating strips extend perpendicularly to a major surface of said plate. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification