Thread transmission structure, optical system and spotlight using the thread transmission structure
US11268677B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 11, 2019 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Oct 11, 2039 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF21V5/048
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
The present disclosure discloses a thread transmission structure, and an optical system and a spotlight using the transmission structure. The thread transmission structure includes a sliding element and a rotation adjustment ring sleeved on an outer ring of the sliding element, the rotation adjustment ring being sleeved on an outer side of the sliding element and coupled to the sliding element, the rotation adjustment ring includes an internal thread, the sliding element includes an external thread, the sliding element includes a plurality of thread segments spaced along a circumferential direction, the plurality of thread segments forming at least one round of interrupted external thread, a thread form of the internal thread and the external thread being trapezoidal or rectangular, and the rotation adjustment ring being rotatable relative to the sliding element to push the sliding element to slide in an axial direction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.