| 摘要 |
PURPOSE:To insulate the base plates of an electronic circuit without any insulating member, while maintaining the strength, by integrally constructing a metal plate which has the functions of both an indirect base plate holding plate formed with an aperture, while avoiding the outside element and pattern wiring on the base plate of the electronic circuit, and a direct base plate holding plate. CONSTITUTION:A base plate 5 of an electronic circuit having a reference vibration source integrally attached is held by means of a base plate holding plate 1 which is composed of indirect and direct base plate holding plates 2 and 3. The indirect holding plate 2 is equipped with a cylindrical wall 2b around a battery 4 and is formed with apertures 2e and 2d, into which such a testing terminal can be inserted as can receive a chip resistor 6, its attaching portions 6a and 6b and time function testing patterns 5f, 5i and 5k. On the other hand, the direct holding plate 3 is formed with an aperture 3b which avoids the wiring patterns 5h-5i, 5j-5k, 5f-5l and 5e-6b other than the pattern 5a relating the power source earth on the aforementioned substrate including the chip resistor and the testing terminal insertion portion. These two metal plates are welded or adhered into a unitary struction so that the strength as a holding plate can be obtained. |
