Switch mechanism for a flashlight
US4939628A · kind A · utility
Inventor
Key dates
| Filing date | Nov 21, 1989 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Nov 21, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V23/0421
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A switch mechanism for a flashlight is disposed in an end cap on a rear end of the flashlight. The switch mechanism includes a plunger cylinder fitted within the end cap, an annular ring being force-fitted on a front end of the plunger cylinder, a guide with a number of guide blocks and a cam surface being slidable in the plunger cylinder, a plunger with a number of ribs and a cam surface being slidable in the guide, a contact element passing through the annular ring, and a spring being biased between a rearmost battery and the contact element. The contact element is pushed to overcome a biasing force of the spring and is contactable with the annular ring by depressing the guide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.