Position detecting device, lens drive device, camera device, and electronic equipment

Abstract

The invention provides a position detecting device, a lens drive device, a camera device, and electronic equipment. The position detecting device is provided with a coil and a conductive part, and thecoil is formed in a plane which takes a direction M perpendicular to a moving direction (a direction L) as the normal direction, and has a curved wiring part. The curved wiring part is provided witha fold-back part formed at an end part, and fold-back width parts which extend from two ends of the fold-back part. The fold-back width parts are respectively provided with direct-entry parts which extend in a parallel manner. The conductive part and the coil are separated by a certain gap in the direction M, and are opposite to each other. Being observed in the direction M, the edge part of the conductive part is set to be opposite to the direct-entry parts of the curved wiring part, and extends in a direction which is not parallel to the extending direction of the direct-entry parts and thedirection L, and laterally passes through the plurality of direct-entry parts. According to the invention, the device can effectively change the size of the coil, is small, and can accurately reflectthe fixed length.

Description

technical field [0001] The present invention relates to a position detection device, a lens driving device including the position detection device, a camera device, and electronic equipment. Background technique [0002] Conventionally, as a position detection device, the structure is such that a substrate with a printed coil is placed parallel to the optical axis on an optical device having a moving frame that fixes a lens and moves in the direction of the optical axis of the lens, and at the same time, A flat conductive member facing the substrate is provided. The conductive member is formed in a trapezoidal shape, so that the width of the projected surface on the coil in the direction perpendicular to the optical axis changes with the position in the direction of the optical axis, and the inductance of the coil changes with the lens moving. For example, in the patent document (Japanese Patent Laid-Open No. 2006-178362 ), the position of the lens is detected according to ...

AI Technical Summary

Problems solved by technology

Therefore, there may be any one of the following problems: because only about half the size of the coil can be used, it is impossible to detect a position at a longer distance; because the remaining half of the coil cannot be used, the required coil area is larger ;If all the coils are to be utilized, the exact position cannot be detected, etc.

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