OPTICAL INFORMATION REPRODUCING DEVICE

PURPOSE:To hold the arrangement of optical parts correctly even in case the temperature varies by bringing the fixing spring part of a united leaf spring which fixes an optical part in the U-shaped groove of a PU case into contact with a reference fitting surface so that optical axes of optical parts are aligned on a straight line, and structuring a positioning claw spring part so that the optical parts are positioned at correct positions in the direction of the optical axes. CONSTITUTION:Optical parts 11-14 are fitted in the U-shaped groove 19 and pressed by the united leaf spring 40 from above, and the united leaf spring 40 is inserted into the U-shaped groove 19. Leaf spring parts 40-1-40-3 of the united leaf spring 40 grip the optical parts while center lines of a couple of leaf springs are aligned with the center axes of the optical parts respectively; and a leaf spring part 40-4 grips the optical parts while its center line is aligned with the center axis of the optical parts. Claw parts 40-5-40-8 press the united leaf spring 40 which grip the optical parts against the horizontal reference fitting surface 19-1 and fitting-side reference surfaces 19-2 and 19-3 of the U-shaped groove 19 and fix them so that the optical axes of the optical parts are aligned with an optical axis k-k.