Lens barrel made by injection molding
US4826424A · kind A · utility
31Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 18, 1986 |
| Grant date | May 2, 1989 |
| Priority date | — |
| Expiry date | Sep 18, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31507
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A lens barrel member in which an equally divided helicoid portion is provided on the inner periphery or the outer periphery of a cylinder member forming a lens barrel, and an engaging portion engaged with another lens barrel component is provided at the end of the outer periphery of the cylinder member coaxially with the helicoid portion, the cylinder member being of a sandwich-molded structure comprising a core layer and a skin layer. Also disclosed is a method of molding such lens barrel member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.