Piezoelectric sounding body

1. A piezoelectric sounding body, comprising:

a piezoelectric vibrating plate;

a case housing the piezoelectric vibrating plate;

a first conductive terminal electrically connected to one electrode in the piezoelectric vibrating plate; and

a second conductive terminal electrically connected to the other electrode in the piezoelectric vibrating plate,

wherein at least one of the first conductive terminal and the second conductive terminal including:

a first terminal portion arranged inside the case;

a second terminal portion arranged on the outside of the case; and

a third terminal portion arranged in a terminal insertion hole formed on a bottom surface being parallel to the piezoelectric vibrating plate in the case to connect the first terminal portion and the second terminal portion, and

the first terminal portion includes a sandwiching portion configured to extend along a plane parallel to a plane of the second terminal portion and sandwich a part of the bottom surface of the case between the sandwiching portion and the second terminal portion.

2. The piezoelectric sounding body according to claim 1 , wherein the first terminal portion includes:

a contacting part configured to extend in the same plane as the sandwiching portion and be fixed in a caulking manner so as to contact an inner wall surface at the bottom surface of the case; and

a contact-point part configured to connect the contacting part and the piezoelectric vibrating plate.

3. The piezoelectric sounding body according to claim 2 , wherein the contact-point part extends a direction crossing a first direction defined as an arrangement direction of the sandwiching portion and the contacting part when the first terminal portion is viewed from a normal direction of an arrangement surface of the sandwiching portion and the contacting part.

4. The piezoelectric sounding body according to claim 2 , wherein the contacting part is in contact with a portion of the inner wall surface positioned at one side to the terminal insertion hole, and the sandwiching portion is in contact with a portion of the inner wall surface positioned at the other side to the terminal insertion hole.

5. The piezoelectric sounding body according to claim 3 , wherein the contacting part is in contact with a portion of the inner wall surface positioned at one side to the terminal insertion hole, and the sandwiching portion is in contact with a portion of the inner wall surface positioned at the oside to the terminal insertion hole.

6. The piezoelectric sounding body according to claim 2 , wherein the contact-point part has a shape configured to become narrower from the contacting part toward the piezoelectric vibrating plate.

7. The piezoelectric sounding body according to claim 3 , wherein the contact-point part has a shape configured to become narrower from the contacting part toward the piezoelectric vibrating plate.

8. The piezoelectric sounding body according to claim 4 wherein the contact-point part has a shape configured to become narrower from the contacting part toward the piezoelectric vibrating plate.

9. The piezoelectric sounding body according to claim 5 , wherein the contact-point part has a shape configured to become narrower from the contacting part toward the piezoelectric vibrating plate.

10. The piezoelectric sounding body according to claim 2 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

11. The piezoelectric sounding body according to claim 3 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

12. The piezoelectric sounding body according to claim 4 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

13. The piezoelectric sounding body according to claim 5 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

14. The piezoelectric sounding body according to claim 6 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

15. The piezoelectric sounding body according to claim 7 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

16. The piezoelectric sounding body according to claim 8 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

17. The piezoelectric sounding body according to claim 9 , wherein a caulking projection configured to form a plurality of fixing holes on the contacting part and to fix the contacting part to the inner wall surface is inserted into the fixing hole.

18. The piezoelectric sounding body according to claim 1 , wherein the second terminal portion includes:

a downside part configured to be parallel to the sandwiching portion and to contact an outer wall surface of the case; and

a lateral part configured to be parallel to the third terminal portion and to contact the outer wall surface.

19. The piezoelectric sounding body according to claim 1 , wherein a through hole corresponding to a shape of the sandwiching portion is formed on the third terminal portion.

20. The piezoelectric sounding body according to claim 1 , wherein the case includes:

a lower case where the first conductive terminal and the second conductive terminal are fixed; and

an upper case configured to be fixed in a caulking manner to the lower case and to sandwich the piezoelectric vibrating plate between the upper case and the lower case.