Instrument panel having pointer driven by stepping motor
US6356046B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 13, 2000 |
| Grant date | Mar 12, 2002 |
| Priority date | — |
| Expiry date | Oct 13, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02K37/14
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An instrument panel for use in an automobile includes a speedometer, an engine rotational speed meter and other indicators. A pointer of each meter is driven by a stepping motor via a reduction gear train made of synthetic resin. Terminals of the stepping motor field coils are soldered on a circuit board. After the heat of the soldering is dissipated, the heat-sensitive gear train is assembled to the circuit board. Thus, the resin gears are protected from being damaged by the soldering heat. The soldering is performed under an automatic refolw-soldering or flow-soldering process. As long as the soldering is performed before assembling the resin gears, all the components of the stepping motor and the reduction gear train may be contained in a casing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.