Kiyosi Funai

Title: **Kiyosi Funai: A Pioneer in Disc Technology**

Introduction

Kiyosi Funai, an accomplished inventor based in Amagasaki, Japan, has significantly contributed to the field of disc technology. With a total of three patents to his name, Funai is recognized for his innovative designs that improve the efficiency and functionality of disc operating apparatuses.

Latest Patents

Among his latest patents is the invention of a carriage recording head sandwiched by electromagnetic coil sections. This groundbreaking design includes a frame with a carriage that is movable relative to the disc, equipped with an optical lens or magnetic head for recording and reproducing information. The unique radial guide arrangement allows the carriage to move smoothly in a radial direction, while the electromagnetic coil and permanent magnet collaboration drives the carriage effectively. The hexagonal cross-section of the electromagnetic coil reduces dimensions, enhancing the overall carriage assembly.

Another notable patent is for the head positioning assembly for magnetic disc apparatus. In this design, the carriage is strategically positioned along the edge of a magnetic disc to prevent contact with it. This innovative approach enables the lengthening of the winding bobbin of the voice coil, thereby generating a more robust driving force. As a result, the magnetic read and write head can swiftly position itself over the desired track on the magnetic disc, improving the speed and reliability of data retrieval.

Career Highlights

Kiyosi Funai is currently associated with Mitsubishi Electric Corporation, a leading figure in electronics and technology industries. His work has focused on developing advanced methods and designs that contribute to the efficiency of disc-related technologies.

Collaborations

During his career, Funai has collaborated with notable colleagues, including Takashi Yumura and Tetsu Yamamoto. Together, they have worked on various projects that push the boundaries of current technology, leading to innovations that enhance user experiences.

Conclusion

Kiyosi Funai's contributions to disc technology through his patents reflect his dedication to innovation and improvement in the field. His inventive spirit and collaborative efforts continue to shape the future of data storage and retrieval systems. As an influential figure at Mitsubishi Electric Corporation, he remains a key innovator, driving advancements that benefit both the industry and consumers alike.