Acceleration switch and electronic device
AssigneesSeiko Instruments Inc., Kazuo Toda
InventorsSadashi Shimoda, Kazuo Toda
Life of this patent
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Abstract
An acceleration switch has a frame fixed to a first substrate, a beam positioned inside the frame and supported by the frame, and a mass body supported by the beam and having a hole portion at substantially a center thereof. A central body is positioned inside the hole portion and fixed to the first substrate. The hole portion or the central body are suitably configured, or the position of the hole portion or the position of the center body is suitably selected, so that the acceleration switch is capable of detecting a predetermined acceleration irrespective of the influence of gravity acceleration.
Claims20
An acceleration switch, comprising:
- a first substrate made of an insulating material;
- a frame fixed to the first substrate;
- a beam positioned inside the frame and supported by the frame;
- a mass body supported by the beam and having a hole portion at substantially a center thereof;
- and
- a central body positioned inside the hole portion and fixed to the first substrate,
- wherein a center of the mass body and a center of the central body coincide, and a center of the hole portion does not coincide with the center of the mass body and the center of the central body, when the first substrate is placed substantially horizontal.
An acceleration switch, comprising:
- a first substrate made of an insulating material;
- a frame fixed to the first substrate;
- a beam positioned inside the frame and supported by the frame;
- a mass body supported by the beam and having a hole portion at substantially a center thereof;
- and
- a central body positioned inside the hole portion and fixed to the first substrate,
- wherein a center of the mass body and a center of the hole portion coincide, and a center of the central body does not coincide with the center of the mass body and the center of the hole portion, when the first substrate is placed substantially horizontal.
An acceleration switch, comprising:
- a first substrate made of an insulating material;
- a frame fixed to the first substrate;
- a beam positioned inside the frame and supported by the frame;
- a mass body supported by the beam and having a hole portion at substantially a center thereof;
- and
- a central body positioned inside the hole portion and fixed to the first substrate,
- wherein a center of the central body and a center of the hole portion coincide when a predetermined acceleration other than gravity acceleration is applied to the acceleration switch.
Dependencies are inferred from the claim text.