Portable projection screen device
US8526109B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 29, 2012 |
| Grant date | Sep 3, 2013 |
| Priority date | — |
| Expiry date | Jun 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG03B21/58
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A portable projection screen has a carrying frame, a movable frame, an elastically-rotating reel, a projection screen and two linkages. The carrying frame has a chamber communicating with an opening; the reel is coupled between two ends of the carrying frame in an elastically rotatable manner and is located in the chamber of the carrying frame; the projection screen is arranged via the opening between the movable frame and the carrying frame; the projection screen upper side connects to the movable frame and the lower side connects to the reel; the linkages arranged between the movable frame and the carrying frame, each linkage end respectively pivots to the movable frame and the carrying frame to form a first and a second pivoting part respectively; a third pivoting part is arranged between the two ends of each linkage; the pivoting parts of each linkage is provided an antislip structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.