| 摘要 |
PROBLEM TO BE SOLVED: To prevent a printed board from parting in the mounting process of a piezoelectric oscillator. SOLUTION: This piezoelectric oscillator, which has an electronic component soldered and fixed onto the top surface of a printed board 21 and a piezoelectric vibrator 22 soldered and fixed onto the reverse surface of the printed board, electromagnetically shield a space on the top surface of the printed board by surrounding it with a metallic lid 27, surrounds the piezoelectric vibrator on the reverse surface of the printed board with a resin base 28, and has the upper end part of a lead terminal 25 fixed to a pattern on the printed board, by soldering after the lower end part of the lead terminal 24 united through the resin base is inserted into a through-hole 24 formed in the printed board is characterized by that a fall preventive piece 30 is formed by deforming the upper end part of the lead terminal and can be inserted into the through-hole by elastic deformation in its shrinking direction, and then expands after passing through the through-hole to prevent the lead terminal from falling from the through-hole.
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