Lens device and method of assembly of lens device

A method of assembling a flexible printed circuit board in a lens device that includes a lens barrel defining an optical axis direction and a through-channel on a portion of the lens barrel, said through-channel having a length direction parallel to said optical axis direction and a width direction perpendicular to said length direction, wherein said through-channel includes a first tier and a second tier adjacent one another formed by a first partition that extends at least most of the way across the width direction of said through-channel so that said first tier extends across the width direction of said through-channel and a second partition perpendicular to said first partition that divides said second tier in the width direction so as to form said separate through-channels in said second tier, the method comprising the following steps:

• inserting the flexible printed circuit board into said first tier from one end of said through-channel;
• folding the flexible printed circuit board at the other end of said through-channel into a folded part of the flexible printed circuit board;
• and
• inserting said folded part of the flexible printed circuit board into one of said separate through-channels of said second tier from said other end of said through-channel.