Optical unit with shake correcting function with flexible circuit board having folded-back portions

摘要

Provided is an optical unit with shake correction function wherein it is possible to accurately swing the movable module even when a flexible wiring substrate is connected to the fixing element and movable module. In an optical unit with shake correction function, folding portions, the extending direction of which is reversed towards the vicinity of the swinging support point of a movable module, are provided at the midway portion of a flexible wiring substrate that is connected to the movable module and to a fixing element. In the folding portions, the overlapping portions of the flexible wiring substrate are fixed.

主权项

1. An optical unit with a shake correcting function comprising:
a fixed body; a movable module which holds an optical element; a flexible circuit board which is connected with the movable module and the fixed body; and a movable module drive mechanism for shake correction which swings the movable module with respect to the fixed body; wherein the flexible circuit board is formed in a Z character shape, the flexible circuit board comprising:
a first connected portion connected with the movable module;a first extended part, a first end of the first extended part being connected to the first connected portion;a first folded-back portion continuously connected to a second end of the first extended part, wherein the flexible circuit board becomes folded back under the first extended part at the first folded-back portion;a second extended part, a first end of the second extended part being continuously connected to the first folded-back portion;a second folded-back portion continuously connected to a second end of the second extended part, wherein the flexible circuit board becomes folded back under the second extended part at the second folded-back portion;a third extended part, a first end of the third extended part being continuously connected to the second folded-back portion; anda second connection portion connected to the fixed body, wherein the second connected portion is connected to a second end of the third extended part; wherein portions of the first folded-back portion which are superposed on each other are fixed to each other; wherein portions of the second folded-back portion which are superposed on each other are fixed to each other;wherein a swing support point structured to swing the movable module, the swing support point is provided between the fixed body and the movable module on a side where the flexible circuit board is provided;
wherein the first connected portion is disposed to a first side of the swing support point in a first direction perpendicular to an optical axis direction; wherein the second connected portion is disposed to a second side of the swing support point in a second direction perpendicular to an optical axis direction and opposite to the first direction; wherein the first folded-back portion is disposed to the second side of the swing support point in the second direction; wherein the second folded-back portion is disposed to the first side of the swing support point in the first direction; wherein a first space is provided between the first folded back portion and the movable body in the optical axis direction; wherein a second space is provided between the second folded back portion and the fixed body in the optical axis direction; and wherein the second folded-back portion and a swing center of the swing support point are located at a same position in the optical axis direction.