Abstract: 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.

Abstract: The lens drive device is provided with: a flat AF coil, having a first linear part positioned on the light-receiving side in the optical axis direction, and a second linear part positioned on the image-forming side in the optical axis direction; a single-surface-two-pole AF magnet, configured with a first magnet facing the first linear part and a second magnet facing the second linear part; and a yoke arranged so as to cover the surface of the first magnet on the light-receiving side in the optical axis direction. The surface area of the first magnet surface facing the first linear part is greater than the surface area of the second magnet surface facing the second linear part, and the magnetic flux that crosses the first linear part is greater than the magnetic flux that crosses the second linear part across the entire movable range of an AF moving part.

Abstract: 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 ? 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 ? of the neutral plane to the substrate at a first inflection point, and angle ? of the neutral plane at the circumferential edge of the dome-shaped spring to the substrate satisfy following inequalities of ? ? and ? ?.

Abstract: 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.

Abstract: 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 ? 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 ? of the neutral plane to the substrate at a first inflection point, and angle ? of the neutral plane at the circumferential edge of the dome-shaped spring to the substrate satisfy following inequalities of ? ? and ? ?.

Abstract: 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.

Abstract: Upper and lower leaf springs linear-movably support a sub movable portion with respect to a sub fixed portion. Each of the upper and lower leaf springs has a substantially symmetrical shape, which is symmetric with respect to a center portion thereof, so as to be mounted on the sub fixed portion at the center portion and so as to be mounted on the sub movable portions at both end portions thereof. Each of the upper and lower leaf springs has at least one pair of bending portions, which is symmetric with respect to the center portion, between the center portion and the both end portions.