Title:
LIGHT SHIELDING STRUCTURE FOR FILM UNIT WITH LENS
Document Type and Number:
Japanese Patent JP3737178
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To surely shield a film roll chamber from light even in a state where a gap by pawl-engagement is exposed to external light in spite of simple structure.
SOLUTION: Plural ribs 50 having a slope 50a are formed along a groove 47 on the outer part of the inner wall 47a of the groove 47 of a back cover 23. A projected line part 48 is integrally formed on the inner wall 47b on the film roll chamber 32 side on the deepest part of the groove 47. By covering a main body base part 21 with the back cover 23 and pressing it, the edge part 46 of the base part 21 gets in the groove 47 and comes close to the chamber 32 side along the slope 50a of the rib 50 and is brought into contact with the inner wall 47b of the wall 47 as soon as an engaging pawl 45 is engaged with an engaging hole 44, then the top of the edge part 46 abuts on the projected line part 48. External light made incident from the gap by pawl-engagement is damped by space formed between the edge part 46 and the inner wall 47a. Recessed parts are formed in the upper and the lower corners of the roll chamber 32 and the upper and the lower ends of the rib 53 forming the groove 47 with an outer wall 23a in between are fit in the recessed parts, so that the external light is prevented from entering from the upper and the lower corners of the chamber 32.
Inventors:
Mitsuhiro Moriya
Osamu Noguchi
Osamu Noguchi
Application Number:
JP3094896A
Publication Date:
January 18, 2006
Filing Date:
February 19, 1996
Export Citation:
Assignee:
Fuji Photo Film Co., Ltd.
International Classes:
G03C3/00; (IPC1-7): G03C3/00; G03C3/00
Domestic Patent References:
| JP8022103A |
Attorney, Agent or Firm:
Kazunori Kobayashi