| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a piezoelectric buzzer capable of securing airtightness of a resonance room, and obtaining a desired frequency characteristic. <P>SOLUTION: A press fit section 3a is press-fit between a step section 2c and a contact face 2f by inserting the press fit section 3a into an outer case 2. Thereby, tight contact between a tip face and the contact face 2f of an inner wall 3h for constituting the resonance room 8 is carried out by press fitting. Consequently, the tip face of the inner wall 3h of the press fit section 3a is contacted to the contact face 2f of the outer case 2 without leaving a gap, and there is no leak through the gap between the tip face of the inner wall 3h and the contact face 2f of the outer case 2, and the resonance room 8 is specified for a desired volume. Thereby, it is possible to obtain a frequency characteristic required for buzzer performance. As it is plane press fit in which the tip face of the inner wall 3h of the press fit section 3a is tightly contacted to the contact face 2f of the outer case 2, when compared with line press fit, tighter contact is attained. <P>COPYRIGHT: (C)2011,JPO&INPIT |
