Patent ID: 11949825
Assignee: CANON KABUSHIKI KAISHA
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 5:
6. A scanning optical device according to claim 1, wherein when said bearing surface of the one set of the combination is a first bearing surface and a second bearing surface, said bearing surface of the other set of the combination is a third bearing surface, a ridge line between said second surface and said third surface is a first ridge line, a ridge line between said second surface and said fourth surface is a second ridge line, a ridge line between said first surface and said third surface is a third ridge line, and a ridge line between said first surface and said fourth surface is a fourth ridge line, and
when a distance between said third bearing surface and said first regulating portion in the mirror widthwise direction is a,
a distance between said third bearing surface and said second regulating portion in the mirror widthwise direction is b,
a projecting amount of said third bearing surface projecting toward said second surface is c, and
a width of said reflecting mirror is d,
a distance L1 from said first regulating portion to said third ridge line in a mirror thickness direction satisfies

L1≥c×b/(d−b),

a distance L2 from said first regulating portion to said first ridge line in the mirror thickness direction satisfies

L2≥c×b/(d−b),

a distance L3 from said second regulating portion to said second ridge line in the mirror thickness direction satisfies

L3≥c×a/(d−a), and

a distance L4 from said second regulating portion to said fourth ridge line in the mirror thickness direction satisfies

L4≥c×a/(d−a).