Mitsumi Electric Company Ltd.

Masahiko Aranai

Shigenori Inamoto

Chikara Sekiguchi

Yukihiro Takimoto

An optical element driving apparatus includes: a coil and a magnet separately disposed at a movable part configured to hold an optical element and a fixing part configured to support the movable part, the coil and the magnet being configured to operate in conjunction with each other to move the movable part with respect to the fixing part; and a magnetic sensor configured to detect a position of the movable part based on a relative position with respect to the magnet. The magnetic sensor is mounted on a magnetic sensor substrate, the magnetic sensor substrate is housed in a recess provided in the fixing part.

Optical element driving apparatus, camera module and camera-equipped apparatus

Provided is a dome-shaped spring for placing on a substrate having stationary contacts, and a circumferential edge of the dome-shaped spring is continuously in contact with the stationary contacts. At least a part of a neutral plane has a shape defined by an even function of at least eighth-order. Angle &#x3b1; of the neutral plane of the dome-shaped spring to the substrate at a second inflection point that exists at a second-positioned inflection point from the circumferential edge, angle &#x3b2; of the neutral plane to the substrate at a first inflection point, and angle &#x3b3; of the neutral plane at the circumferential edge of the dome-shaped spring to the substrate satisfy following inequalities of &#x3b1; &#x3b2; and &#x3b2; &#x3b3;.

Dome-shaped spring and switch using the same

Disclosed is a dome shaped spring including: a dome shaped spring section in which buckling occurs by pushing, wherein at least a portion of a neutral face of a movable portion when buckling of the dome shaped spring section occurs is an aspherical shape.

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Tendo, Japan

Masahiko Aranai