Printed circuit board and method for attaching movable switch thereto
AssigneeFuji Photo Film Co., Ltd.
InventorSeiji Asano
Life of this patent
Estimating the term…
Abstract
A printed circuit board is provided with two soldering land portions on respective lead lines. Each of the soldering land portions has two sub-soldering land portions and a narrow connecting portion for connecting the sub-soldering portions, so that the land portions are substantially H-shaped. When the printed circuit board is dip soldered after being coated with a solder-proof layer exposing the soldering land portions, solder sticks to the soldering land portions in such a way that it is thicker on the sub-soldering land portions but thinner on the narrow connecting portions. Thereafter, the synchro contacts of a camera flash unit are positioned on the respective narrow connecting portions and soldered to the lead lines by a soldering iron or hot air.
Claims17
A method for attaching a pair of switch contacts to a printed circuit board having at least two lead lines, comprising the steps of:
- providing a soldering land portion on each of said lead lines by coating a surface of said lead lines with a solder-proof layer while leaving uncoated said soldering land portions, each of said soldering land portions having two sub-soldering land portions and a narrow connecting portion interconnecting middle portions of said sub-soldering land portions;
- coating each of said soldering land portions with solder;
- attaching a holder with said switch contacts to said printed circuit board such that one end of each of said switch contacts is positioned on a respective one of said narrow connecting portions;
- and
- soldering said switch contacts to said lead lines by melting the solder on said soldering land portions.
A printed circuit board having at least two lead lines thereon and a holder with a pair of switch contacts secured to said board, comprising:
- a soldering land portion provided on each of said lead lines to solder said switch contacts to respective ones of said lead lines, each of said soldering land portions having two sub-soldering land portions and a narrow connecting portion interconnecting middle portions of said sub-soldering land portions, said narrow connecting portions being in electrical contact with respective ones of said switch contacts.
A printed circuit board having at least two lead lines thereon and a soldering land portion provided on each of said lead lines, each of said soldering land portions having two sub-soldering land portions and a narrow connecting portion interconnecting middle portions of said sub-soldering land portions.
Dependencies are inferred from the claim text.