| 摘要 |
A wristwatch case ( 11 ) and a method of manufacturing the case, the wristwatch case comprising a wristwatch case body ( 1 ) made of titanium or stainless steel and a crown pipe ( 3 ) fixed to each other, wherein a stem hole ( 2 ) corresponding to the crown pipe ( 3 ) is formed in the wristwatch case body ( 1 ), a small diameter part is formed in the crown pipe ( 3 ), and a small diameter part corresponding to the a small diameter part of the crown pipe is formed in the stem hole ( 2 ), the method comprising the step of fitting the crown pipe ( 3 ) into the stem hole ( 2 ) in the wristwatch case body ( 1 ) to form a solid phase diffusion joining part at a portion where the small diameter parts thereof are fitted closely to each other, and to form a brazed connection part at a portion other than that where the small diameter parts are fitted closely to each other, whereby a watch external part having excellent corrosion resistance and waterproof and a large number of design variations can be provided.
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