Abstract: Formation of a pool of liquid around a locking pin is inhibited when a protector is provided around the locking pin. The protector is provided with projecting side surfaces that are connected to the upper surface and the lower surface and are provided above and below the locking pin. The projecting side surfaces project to the inside of the recess to an extent greater than the maximum protrusion length of the locking pin at which the locking pin protrudes to the inside of the recess to the maximum extent. The lower surface of the protector is sloped downward toward the inside of the recess from the rear side wall on which the locking pin is provided.

Abstract: Formation of a pool of liquid around a locking pin is inhibited when a protector is provided around the locking pin. The protector is provided with projecting side surfaces that are connected to the upper surface and the lower surface and are provided above and below the locking pin. The projecting side surfaces project to the inside of the recess to an extent greater than the maximum protrusion length of the locking pin at which the locking pin protrudes to the inside of the recess to the maximum extent. The lower surface of the protector is sloped downward toward the inside of the recess from the rear side wall on which the locking pin is provided.

Abstract: The invention makes easy acquisition of depth distance information of a subject possible by a small-sized device. In a compound eye imaging system comprising a compound eye optical system having a plurality of optical blocks and an imaging element for picking-up object images formed by the optical blocks in imaging ranges provided for each optical block, the optical axes of the optical blocks are made to intersect each other at the object side.