| 摘要 |
PURPOSE:To eliminate boding work of inner case and make said case thin by abutting projection provided at the external bottom part of inner case against the internal surface of mold and simultaneously closely making contact the inner cases through the circumferences at the end surface of apertures. CONSTITUTION:A tuning folk vibrator 11 is covered with the inner cases 14, 15 through matching of the circumferences of apertures 14a, 15a, the temporary fixing projection 14c and temporry fixing hole 14d are respectively engaged with the temporary fixing hole 15d and temporary fixing projection 15c, after the inner cases 14 and 15 are mutually fixed temporarily under the condition that the lead terminals 12, 13 are protruded to the outside from the cut-away part 22, the entire part is loaded within the metal molds 31, 32. Then they are tightened in the directions of arrows Ar1, Ar2, the end surfaces of the projections 14b, 15b of the inner cases 14, 15 respectively abut against the internal surfaces 31a, 32a of the metal mold and the circumferential edges 14a, 15a of apertures are mutually placed in the close contact, sealing the inside. Then, the mold resin 34 is supplied to the metal molds 31, 32 and it is hardened. Thereby, the tuning folk type vibrator 11 is supported within the vibrating space 33 and a tuning folk vibrating part 35 which is molded by the resin 34 in such a thickness as is equal to the height of protrusions 14b, 15b can be obtained. |
