| 摘要 |
PURPOSE:To miniaturize a watch with high magnetism resistance by constituting the middle and back of the watch by inner and outer middles and back gasket and body respectively and using ''Permalloy'' for the inner middle and the back gasket and stainless steel with high magnetic permeability for the outer middle and the back body. CONSTITUTION:The middle part and the back part are constituted of two parts respectively. ''Permalloy'' or pure ion with high magnetic permeability is used for the inner middle 21b and the back gasket 22a as the material and ferritic stainless steel with superior corrosion resistance and high magnetic permeability protecting the external view are used for the outer body 21b and the back cover body 22b. The inner middle 21a and the outer middle 21b and the back gasket 22a and the back body 22b are joined and fixed respectively by using an epoxy or acrylic bonding agent or brazing or screwing. Consequently, the middle and back with constant thickness can be obtained and the magnetism resistance can be extremely improved. |
