Acceleration detecting device
AssigneeMitsubishi Denki Kabushiki Kaisha
InventorsEiichiro Murai, Tohru Matsumoto, Yuji Hiraoka
Life of this patent
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Abstract
An acceleration detecting device comprising a movable weight, a movable electric contact disposed on the weight, a fixed electric contact, an resilient member, and a friction creating mechanism. The movable electric contact slides on the fixed electric contact when a force is given to the weight for moving the weight in a first direction. The resilient member urges the weight continually in a second direction opposing to the first direction. The friction creating mechanism gives a frictional force to the weight when the weight travels a distance in excess of a certain amount in the first direction. The friction creating mechanism increases the frictional force as the weight continues to advance further in the first direction.
Claims12
An acceleration detecting device comprising:
- a movable weight;
- a movable electric contact disposed on the weight;
- a fixed electric contact on which the movable electric contact slides when a force is given to the weight for moving the weight in a first direction, wherein the movable electric contact first contacts the fixed electric contact after the weight travels a first predetermined distance in the first direction;
- a resilient member for urging the weight continually in a second direction opposing to the first direction;
- and
- a friction creating mechanism for initiating a frictional force to the weight when the weight travels a second predetermined distance in the first direction beyond the first predetermined distance, the friction creating mechanism increasing the frictional force as the weight continues to advance further in the first direction.
An acceleration detecting device comprising:
- a movable weight;
- a movable electric contact disposed on the weight;
- a fixed electric contact on which the movable electric contact slides when a force is given to the weight for moving the weight in a first direction;
- a resilient member for urging the weight continually in a second direction opposing to the first direction;
- and
- a friction creating mechanism for giving a frictional force to the weight when the weight travels a distance in excess of a certain amount in the first direction, the friction creating mechanism increasing the frictional force as the weight continues to advance further in the first direction;
- and
- wherein the friction creating mechanism includes:
- a protrusion fixedly arranged in place;
- a leaf spring disposed on the weight, the leaf spring coming into contact with the protrusion for commencing to deform elastically when the weight travels a distance in excess of a certain amount in the first direction;
- a fixed brake fixedly arranged in place;
- and
- a movable brake capable of being in contact with the fixed brake, the movable brake deforming and increasing the frictional force to the fixed brake in accordance with an increase of elastic deformation of the leaf spring.
An acceleration detecting device comprising:
- a housing having a cavity and a longitudinal axis;
- a weight movable within the cavity along the longitudinal axis;
- a movable electric contact disposed on the weight;
- a fixed electric contact on which the movable electric contact slides when a force is given to the weight for moving the weight in a first direction, wherein the movable electric contact first contacts the fixed electric contact after the weight travels a first predetermined distance in the first direction;
- and
- a friction creating mechanism for initiating a frictional force to the weight when the weight travels a second predetermined distance in the first direction beyond the first predetermined distance, the friction creating mechanism increasing the frictional force as the weight continues to advance further in the first direction.
Dependencies are inferred from the claim text.