Mitsui Mining & Smelting has been granted a patent for a door latch device featuring two position switches that operate simultaneously. The device includes a common pin and signal pins for electrical connections, enhancing functionality and coordination in switch operations related to a specific detection target. GlobalData’s report on Mitsui Mining & Smelting gives a 360-degree view of the company including its patenting strategy. Buy the report here.

According to GlobalData’s company profile on Mitsui Mining & Smelting, Hydrogen storage alloys was a key innovation area identified from patents. Mitsui Mining & Smelting's grant share as of July 2024 was 47%. Grant share is based on the ratio of number of grants to total number of patents.

Door latch device with synchronized position switches

Source: United States Patent and Trademark Office (USPTO). Credit: Mitsui Mining & Smelting Co Ltd

The patent US12071792B2 describes a door latch device that integrates a dual switch mechanism for enhanced operational efficiency. The device features two position switches, each equipped with a first contact hole, a second contact hole, and a common contact hole, all aligned linearly. These switches are strategically positioned and stacked to facilitate simultaneous operation in response to a predetermined detection target. The design includes a common pin and two signal pins that connect to the respective contact holes, ensuring synchronized switch operations. This configuration aims to improve the reliability and responsiveness of the door latch mechanism.

Additionally, the door latch device incorporates a circuit board from which the pins extend, allowing for effective electrical connections. The design includes a partition plate that separates the circuit board from the switches, with waterproof treatment applied around the pin holes to enhance durability. The operation detection target is defined by two cams that interact with the switches, indicating the state of a lock mechanism that can toggle between locked and unlocked states. The device also features a latch mechanism, an electric release unit, and a manual release unit, collectively designed to secure a vehicle door while providing multiple release options. This comprehensive approach aims to enhance both security and user convenience in vehicle door operations.

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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.