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Patent US4811039A successfully refreshed from Google Patents.
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US4811039A Expired / Lapsed US ⏱️ 0.0 years remaining

Camera

Assignee: Canon Inc
•
Filing: 1986-05-30
•
Granted: 1989-03-07
•
Expires: 2006-05-30
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Abstract

Abstract In a camera having the body thereof molded with optical members inserted in a synthetic resin material, the parts of the resin material covering the periphery of each of the optical members on the inner and outer sides thereof are arranged to have a thickness ratio varying between about 1:0.5 and about 1:2. Each of chamfers "c" which are provided on the optical member in the direction of thickness "t" thereof is arranged to be about 0.1 (mm)≦c≦ about 0.2 t. Further, each intersecting angular part between two adjacent sides of the optical member is chamfered with the chamfer measuring about 0.1 l to 0.45 l or thereabout relative to the length l of the shorter of the two sides. The bevelling arrangement prevents the optical members from cracking due to uneven stress developing during the forming and contracting processes of insert molding.

Inventors

  • 👤 Hiroshi Maeno
  • 👤 Hideo Tamamura

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 18:05
CPC Classifications
G; G03; G03B; G03B17/00; G03B17/02; G03B17/08

Claims Analysis

Total Claims: 9
Claim 1
Independent Claim 69 words
A camera comprising: (a) each optical member having each intersecting angular part between two adjacent sides thereof chamfered, said chamfered part measuring approximately 0.1 l to 0.45 l relative to the length l of the shorter of said two adjacent sides; and (b) a camera body molded with a resin material with said optical member inserted in said resin material in molding said camera body with said resin material.
Claim 2
Dependent Claim 69 words
A camera comprising: (a) each optical member having each intersecting angular part between two adjacent sides thereof chamfered, said chamfered part measuring approximately 0.1 l to 0.45 l relative to the length l of the shorter of said two adjacent sides; and (b) a camera body molded with a resin material with said optical member inserted in said resin material in molding said camera body with said resin material.
Claim 3
Dependent Claim 14 words
A camera according to claim 1, wherein said optical member includes a glass material.
Claim 4
Dependent Claim 16 words
A camera according to claim 1, wherein said camera is arranged to be a water-proof camera.
Claim 5
Dependent Claim 52 words
A camera comprising: (a) an optical member, said optical member having chamfers c in the direction of the thickness t thereof, each of said chamfers being arranged to be approximately 0.1 (mm)≦c≦approximately 0.2 t; and (b) a camera body which is molded with a resin material, with said optical member inserted therein.
Claim 6
Dependent Claim 52 words
A camera comprising: (a) an optical member, said optical member having chamfers c in the direction of the thickness t thereof, each of said chamfers being arranged to be approximately 0.1 (mm)≦c≦approximately 0.2 t; and (b) a camera body which is molded with a resin material, with said optical member inserted therein.
Claim 7
Dependent Claim 14 words
A camera according to claim 4, wherein said optical member includes a glass material.
Claim 8
Dependent Claim 16 words
A camera according to claim 4, wherein said camera is arranged to be a water-proof camera.
Claim 9
Dependent Claim 49 words
A camera according to claim 4, further comprising holding pins for holding said optical member when said optical member is inserted in place, said holding pins having a chamfer measuring about 0.1 (mm) to about 0.2 (mm) at their end portions which come into contact with said optical means.

References Cited (Backward Citations)

US3065666A Cited
US3206017A Cited
US3906535A Cited
JPS59164539A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1992-03-06 1992-09-05 1993-03-07 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1996-03-06 1996-09-05 1997-03-07 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2000-03-06 2000-09-05 2001-03-07 $7700.00 Window Closed / Lapsed

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