Abstract: An electrolyte solution containing a compound (1) represented by the formula (1), (wherein R101 and R102 are each individually a substituent such as a C1-C7 alkyl group, and the substituent optionally contains at least one divalent to hexavalent hetero atom in a structure or optionally has a structure obtained by replacing at least one hydrogen atom by a fluorine atom or a C0-C7 functional group) and at least one compound (11) selected from compounds such as a compound represented by formula (11-1) (wherein R111 and R112 are the same as or different from each other and are each a hydrogen atom or the like, and R113 is an alkyl group free from a fluorine atom or the like):

Abstract: There is disclosed a torsional rocking structural component comprising: a movable plate; an elastic member for rockably supporting the movable plate, the elastic member having a rectangular parallelepiped shape, and a rectangular surface; a support for holding the elastic member; and a wiring passing through the elastic member, disposed in the vicinity of a surface of the elastic member and passing through a portion in which a stress generated during torsional deformation of the elastic member is small.

Abstract: There is disclosed a torsional rocking structural component comprising: a movable plate; an elastic member for rockably supporting the movable plate, the elastic member having a rectangular parallelepiped shape, and a rectangular surface; a support for holding the elastic member; and a wiring passing through the elastic member, disposed in the vicinity of a surface of the elastic member and passing through a portion in which a stress generated during torsional deformation of the elastic member is small.

Abstract: There is disclosed a torsional rocking structural component comprising: a movable plate; an elastic member for rockably supporting the movable plate, the elastic member having a rectangular parallelepiped shape, and a rectangular surface; a support for holding the elastic member; and a wiring passing through the elastic member, disposed in the vicinity of a surface of the elastic member and passing through a portion in which a stress generated during torsional deformation of the elastic member is small.

Abstract: A torsional rocker used in an optical scanner comprises a movable element, a pair of torsion spring structures or elastic members for rockably supporting the movable element, and a stationary element which fixes or holds the torsion spring structures. The movable element includes a coil which surrounds its edges and a mirror inside the coil. The opposite ends of the coil are connected individually to electrode pads on the stationary element by means of wires. The torsion spring structure includes a pair of leaf springs which extend parallel to each other, and the torsion spring structure also includes another pair of leaf springs which extend parallel to each other. The four leaf springs have the same thickness.