| 摘要 |
PURPOSE:To prevent the dropping of a removed piece from a narrow groove by the heat of soldering by half-cutting both the ends of the narrow groove provided along the dividing position of a printed board integrated with a plurality of the printed boards and by recessing the center of the removed piece downwards from both the ends. CONSTITUTION:Two grooves (f) and three connecting bridges (g) are formed along the dividing position of a printed board 1 integrated with two after press- cutting and holes (e) for inserting parts are formed on each printed board 1a, 1b. The removed piece (d) of the above-mentioned narrow groove (f) is so formed that both the ends of the piece are made to have an inclined surface (h) inclined downwards toward the center (i) and the center (i) which connects both the ends to the inclined surfaces (h) is recessed downwards than the above- mentioned both the ends. The above-mentioned removed piece (d) is also half-cut at both the ends and is prevented from dropping from the narrow groove (f). When the connecting bridge (g) is cut after soldering, the two printed boards 1a, 1b are separated.
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