| 摘要 |
<p>PURPOSE:To prevent a proximity switch including a coil case fitted in a case body from setting-off of the coil case out of the case body or breakage of a circuit board and/or electronic parts mounted thereon resulting from thermal expansion of a soft resin which is used to fill the inside for protecting the circuit board. CONSTITUTION:A coil case 2 fitted interiorly with a sensor part 3 is interiorly fitted at and supported by the front extremity of a case body 1, and a circuit board 4 furnished in the sensor part 3 is covered with a soft resin with which the case body 1 is filed. A cord 8 connected with the circuit board 4 and led out from the rear end of the case body 1 is sealed fast with a hard resin 14 as filling at the rear end of the case body 1, and a space 13 is formed between the soft resin material 10 and hard resin material 14.</p> |
