Mitsubishi Electric has been granted a patent for a spark coil design. The coil includes a center core, primary coil, secondary coil, and an output terminal. The secondary coil features a tubular secondary bobbin with flanges, a secondary conductive wire, and a sheet-shaped secondary lead terminal. The lead terminal is positioned between the flanges, in contact with protrusions on the flanges. GlobalData’s report on Mitsubishi Electric gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Mitsubishi Electric, Smart climate control systems was a key innovation area identified from patents. Mitsubishi Electric's grant share as of September 2023 was 29%. Grant share is based on the ratio of number of grants to total number of patents.
Spark coil with improved secondary lead terminal contact
A recently granted patent (Publication Number: US11776740B2) describes a spark coil with improved design and functionality. The spark coil includes a center core, a primary coil, a secondary coil, and an output terminal. The secondary coil is made up of a tubular secondary bobbin with flanges, a secondary conductive wire wound around the bobbin, and a sheet-shaped secondary lead terminal. The secondary lead terminal is electrically connected to the secondary conductive wire and the output terminal.
One notable feature of the spark coil is that each flange of the secondary bobbin has a protrusion on its side surface. The secondary lead terminal is positioned between the flanges and is in contact with these protrusions. This design ensures a secure and reliable electrical connection between the secondary coil and the output terminal.
In one embodiment, the protrusions on the flanges are in the form of ribs, and the secondary lead terminal is in line contact with these ribs. This configuration further enhances the electrical connection and stability of the spark coil.
Additionally, the patent mentions that both the secondary lead terminal and the side surfaces of the flanges can have line-shaped protrusions or needle-shaped protrusions. These protrusions may contribute to improved electrical conductivity and mechanical strength of the spark coil.
Furthermore, the patent describes the presence of a cut portion in either the secondary bobbin or the secondary lead terminal, positioned where they oppose each other. This cut portion may facilitate assembly or disassembly of the spark coil, allowing for easier maintenance or replacement if needed.
Overall, the granted patent presents an innovative spark coil design that addresses issues related to electrical connection and stability. The inclusion of protrusions on the flanges and the use of a secondary lead terminal improve the reliability and performance of the spark coil. The various embodiments described in the patent offer flexibility in terms of design and manufacturing options.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
