JP2543172B2 - Piezoelectric sounder - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a piezoelectric sounding body used for sounding various alarms and key operation confirmation sounds.

2. Description of the Related Art Conventionally, this type of piezoelectric sounding body has a configuration as shown in FIGS. In FIGS. 3 and 4, reference numeral 1 is a piezoelectric vibrating plate having a structure in which a thin metal plate 2 and a thin piezoelectric ceramic plate 3 are bonded together. This piezoelectric vibrating plate 1 is adhered and fixed to a case 5 having a sound emission hole 4, and a projection 8 provided in a recess 7 of the case 5 is passed through the metal lead terminal 6 and the projection 8 is welded by heat. It was fixed. Further, the piezoelectric vibrating plate 1 and the metal lead terminal 6 were electrically connected by soldering 10 the tip of the section 9 integrally formed with the lead terminal 6.

SUMMARY OF THE INVENTION In such a conventional configuration, the metal lead terminal 6 has a configuration in which the convex portion 8 provided in the concave portion 7 of the case 5 is inserted through and the convex portion 8 is heat-welded and fixed. . Therefore, the portion fixed by welding is loosened due to changes in temperature, and the metal lead terminal 6
There was a problem of rattling.

The present invention solves such a problem, and an object thereof is to provide a piezoelectric sounding body in which the metal lead terminals do not rattle even when the temperature changes.

Means for Solving the Problem In order to solve this problem, the present invention inserts and fits a fixing portion of a metal lead terminal having a connecting piece electrically connected to a piezoelectric diaphragm into a fixing hole of a case. After that, the terminal portion is bent approximately 90 °, and the terminal portion is pushed and fixed to a fixing portion under the passage where both walls formed in the case are gradually narrowed.

Operation According to this configuration, the metal lead terminal has its fixing portion inserted into the fixing hole, and the terminal portion is bent and fixed by being bent approximately 90 ° into the fixing portion under the passage where both walls are gradually narrowed. Therefore, it is possible to provide a piezoelectric sounding body which does not come out in the upper passage direction after being pushed in and is therefore free from rattling.

Embodiment FIG. 1 shows an embodiment of the present invention. 1 (a) is a front view, FIG. 1 (b) is a bottom view, and FIG. 1 (c) is a sectional view taken along the line A-O-B in FIG. 1 (a). In FIG. It is a case made of an insulator. 12 is a metal plate 13
A piezoelectric vibrating plate in which a piezoelectric element 14 is bonded to the. 15,16
Is a metal lead terminal fixed to the case 11. 17,18
Is a gradually narrowing wall surface for fixing the fixing portion 19 of the metal lead terminals 15 and 16 shown in FIG.
Is provided.

In this embodiment, first, the case 11 is provided with a second fixing hole 20.
As shown in the figure, the fixing portions 19 of the flat metal lead terminals 15 and 16 are inserted and fixed by the spring portions 21 of the fixing portions 19 as shown in FIG. 1 (c). Then, fold the terminal part 22 by 90 degrees to form walls 17, 18
It is fixed by pushing it into the fixing portion 15A through the space. Here, 23 is a reinforcing rib for obtaining the strength of the terminal, and 24 is a terminal portion.
It is a slit that makes it easy to bend 22 at 90 °.

Further, 25 is a fixing piece to the piezoelectric vibrating plate 12, which is bent by 180 ° and soldered 26.

Effects of the Invention As described above, according to the present invention, after fixing and fixing the fixed portion of the metal lead terminal having the connecting piece electrically connected to the piezoelectric vibrating plate into the fixing hole of the case, the terminal portion is substantially removed. The terminal portion is bent 90 °, and the terminal portion is pushed and fixed to a fixing portion under a passage in which both walls formed in the case are gradually narrowed.

According to this structure, the metal lead terminal has its fixing portion inserted into the fixing hole, and the terminal portion is bent and fixed by being bent at about 90 ° into the fixing portion under the passage where both walls are gradually narrowed. It is possible to provide a piezoelectric sounding body which does not come out in the upper passage direction after being pushed in and is therefore free from rattling.

[Brief description of drawings]

1 (a) to 1 (c) are a front view and a bottom view showing a piezoelectric speaker according to an embodiment of the present invention, and A--O--B in FIG. 1 (a).
Sectional views, FIGS. 2 (a) and 2 (b) are front views of a metal lead terminal according to an embodiment of the present invention, right side views, FIG. 3 is a front view showing a conventional piezoelectric speaker, and FIG. It is sectional drawing which shows the conventional piezoelectric speaker. 11 ... Case, 12 ... Piezoelectric diaphragm, 13 ... Metal plate, 14 ...
… Piezoelectric element, 15,16 …… Metal lead terminal, 17,18 …… Wall,
19 …… Fixed part, 22 …… Terminal part.

Claims (1)

(57) [Claims] 1. A piezoelectric vibrating plate formed by bonding a piezoelectric element to a thin plate such as a metal plate, a case made of an insulator to which the piezoelectric vibrating plate is attached, and a connecting piece electrically connected to the piezoelectric vibrating plate. The metal lead terminal is connected to the metal lead terminal, and the fixing portion of the metal lead terminal is inserted and fitted into the fixing hole of the case to be fixed, and then the terminal portion is bent at about 90 ° to form the terminal portion on the case. Piezoelectric sounder fixed to the fixed part under the passage where both walls are gradually narrowed.