Okuno O, Ishikawa S, Imuro F T, Kinouchi Y, Yamada H, Nakano T, Hamanaka H, Ishihata N, Mizutani H, Ai M
Tokyo Medical and Dental University.
Dent Mater J. 1991 Dec;10(2):172-4. doi: 10.4012/dmj.10.172.
The purpose of this study was to develop a small cup type yoke magnetic attachment sealed from oral fluid. The magnetic device forms a closed circuit between the magnet, yokes, and keeper. A 3.2 mm phi x 1.4 mm SmCO5 magnet was put into a cup yoke of 447J1 stainless steel and covered by 447J1 stainless steel disk yoke with a 316L stainless steel ring. To protect the magnet from corrosion, the connection was sealed by laser welding. The optimum dimensions were figured out by a finite element method. The performance of the magnetic attachment was investigated. As a result, a magnet device 4.4 mm in diameter and 2.1 mm in height was developed. The breakaway retention when the keeper touched it was 341 gf on average.
本研究的目的是开发一种小型杯型轭铁磁性附着体，其与口腔液体密封隔离。该磁性装置在磁体、轭铁和衔铁之间形成闭合回路。将一个直径3.2毫米×高1.4毫米的钐钴5磁体放入由447J1不锈钢制成的杯形轭铁中，并用带有316L不锈钢环的447J1不锈钢圆盘轭铁覆盖。为保护磁体不受腐蚀，连接处采用激光焊接密封。通过有限元方法确定了最佳尺寸。对磁性附着体的性能进行了研究。结果，开发出了一种直径4.4毫米、高2.1毫米的磁体装置。当衔铁接触时，其平均分离保持力为341克力。
