JPS6344877Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an electric horn installed in automobiles, etc., and particularly relates to a fixing structure between a body and a diaphragm of the electric horn.

DESCRIPTION OF THE RELATED ART Conventionally, as shown in FIG. 1, for example, an electric horn is known which has a structure in which the peripheral edge of a diaphragm 3 is caulked and fixed to a flange 2 of a body 1 by a ring member 4.

However, in the above-mentioned conventional electric alarm,
It is difficult to set the caulking pressure of the diaphragm 3,
It has the disadvantage that the range of sound pressure and blowable voltage tends to vary due to excess or deficiency of caulking pressure.

The purpose of this invention is to eliminate the above-mentioned conventional drawbacks, and the flange part of the body is formed with a rising part, and the height of the rising part makes the caulking pressure for fixing the diaphragm to the body constant. The present invention is characterized in that it is configured so that variations in the width of the sound pressure and blowable voltage due to excess or deficiency of caulking pressure do not occur.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in FIGS. 2 and 3.

In the figure, reference numeral 1 denotes a substantially cup-shaped body, and a known excitation device comprising an excitation coil, a current interrupter, etc. is housed inside the body 1. A flange 2 is formed around the opening of the body 1,
Further, a rising portion 2a having a certain height is integrally formed at the tip of the flange 2. 3
is a diaphragm disposed in the opening of the body 1, and the periphery of the diaphragm 3 is surrounded by gaskets 5a, 5.
It is caulked and fixed to the flange 2 of the body 1 by a ring member 4 via b. Here, the gasket 5 is properly caulked and fixed.
The thicknesses of a, 5b and the diaphragm 3 are set to be equal to the height of the rising portion 2a of the flange 2. Reference numeral 6 denotes an armature fixed to the center of the diaphragm 3, 7 a disk arranged substantially parallel to the diaphragm 3, and the disk 7 fixed to the threaded portion 6a of the armature 6. Therefore, when the armature 6 is intermittently attracted by an excitation device (not shown) housed in the body 1, the diaphragm 3 and the disk 7 vibrate, producing a blowing sound.

Therefore, in the electric alarm configured as described above, when the ring member 4 is pressed from above and below as indicated by arrows P and Q in FIG. 3 to caulk and fix the periphery of the diaphragm 3, The caulking width is regulated to be constant by the rising portion 2a perpendicular to the direction. Therefore, the caulking pressure acting on the periphery of the diaphragm 3 due to the caulking fixation is reduced to the rising portion 2.
It becomes a constant value set by a, and there is no variation in the crimping pressure between individual products.

As is clear from the above explanation, in the electric alarm of the present invention, a raised part is formed in the flange part of the body, and the caulking pressure for fixing the diaphragm to the body is constant depending on the height of the raised part. The diaphragm caulking pressure can be easily set, and
The simple configuration can prevent variations in sound pressure and blowable voltage range, and has excellent practical effects.

[Brief explanation of the drawing]

FIG. 1 is a partially cutaway side view showing a conventional example.
FIG. 2 is a partially cutaway side view showing an embodiment of the present invention;
FIG. 3 is an enlarged sectional view of the main part. Explanation of symbols: 1...Body, 2...Flange, 2a...Rising portion, 3...Diaphragm, 4...Ring member, 5a, 5b...Gasket.

Claims (1)

[Scope of utility model registration request] In an electric alarm equipped with a body in which an excitation device is housed and a diaphragm whose periphery is crimped and fixed to a flange provided at the periphery of the body opening, there is a crimping width regulation at the tip of the flange of the body opening. An electric alarm is formed integrally with the rising part of the body, and the periphery of the diaphragm is caulked and fixed to the flange of the body integrally with the rising part by a ring member.