Mechanism for detecting load
First Claim
1. A mechanism for detecting a load comprisingmeans including a load shaft member extending in a first direction in which a load to be detected is exerted;
- andmeans including at least one double link mechanism which comprisesa common link member extending substantially in parallel with said load shaft member,first and second arm members each of which extends in a second direction substantially perpendicular to said first direction, the ends of said first arm member being connected to one end of said load shaft member and one end of said common link member, respectively, and the ends of said second arm member being connected to opposite ends of said load shaft member and common link member, respectively,third and fourth arm members extending substantially in parallel with said first and second arm members, respectively, one end of said third and fourth arm members being connected to said ends of said common link member, respectively, and the opposite ends of said third and fourth arm members being connected to a fixed member positioned near said load shaft member,fifth and sixth arm members having one end of each connected to said ends of said common link member, respectively, and the opposite ends of each connected to a fixed member near said load shaft member,said first, third and fifth arm members and said second, fourth and sixth arm members being postioned in first and second planes, respectively, said first and second planes being perpendicular to a plane including said first and second directions, whereby said first and second arm members extend between said third and fifth arm members and between said fourth and sixth arm members, respectively,flexure members formed in each of said arm members at said ends thereof, whereby said first and second arm members and common link member form a first parallelogram link mechanism, said third and fourth arm members and common link member form a second parallelogram link mechanism having substantially the same dimension as that of the first parallelogram link mechanism, and said fifth and sixth arm members and common link member form a third parallelogram link mechanism having substantially the same dimension as that of the first parallelogram link mechanism.
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Accused Products
Abstract
A mechanism for detecting a load including a load shaft connected to a pan receiving rod and extending vertically, a first arm plate having integrally formed arms whose one ends are connected to each other, a second arm plate having integrally formed arms whose one ends are connected to each other, and a vertical link connected between the one ends of the arms of first and second arm plates, the other ends of the arms of first and second arm plates being connected to the load shaft and to a fixed member. When a load is applied to the load shaft, the load shaft is moved linearly in the vertical direction without being affected by a force exerted to the load shaft in the horizontal direction.
39 Citations
19 Claims
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1. A mechanism for detecting a load comprising
means including a load shaft member extending in a first direction in which a load to be detected is exerted; - and
means including at least one double link mechanism which comprises a common link member extending substantially in parallel with said load shaft member, first and second arm members each of which extends in a second direction substantially perpendicular to said first direction, the ends of said first arm member being connected to one end of said load shaft member and one end of said common link member, respectively, and the ends of said second arm member being connected to opposite ends of said load shaft member and common link member, respectively, third and fourth arm members extending substantially in parallel with said first and second arm members, respectively, one end of said third and fourth arm members being connected to said ends of said common link member, respectively, and the opposite ends of said third and fourth arm members being connected to a fixed member positioned near said load shaft member, fifth and sixth arm members having one end of each connected to said ends of said common link member, respectively, and the opposite ends of each connected to a fixed member near said load shaft member, said first, third and fifth arm members and said second, fourth and sixth arm members being postioned in first and second planes, respectively, said first and second planes being perpendicular to a plane including said first and second directions, whereby said first and second arm members extend between said third and fifth arm members and between said fourth and sixth arm members, respectively, flexure members formed in each of said arm members at said ends thereof, whereby said first and second arm members and common link member form a first parallelogram link mechanism, said third and fourth arm members and common link member form a second parallelogram link mechanism having substantially the same dimension as that of the first parallelogram link mechanism, and said fifth and sixth arm members and common link member form a third parallelogram link mechanism having substantially the same dimension as that of the first parallelogram link mechanism. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification