JPS6035119Y2 - electric horn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electric horn, and more particularly to an electric horn that can simultaneously generate two or more tones of alarm from a single horn.

2. Description of the Related Art Vehicles such as automobiles are usually equipped with a horn that emits a warning sound with only one type of tone, but vehicle drivers often feel the need to generate a warning sound with a variety of tones.

Therefore, conventionally, in order to satisfy such desires, vehicle drivers have equipped their vehicles with two or more warning horns as options.
These horns were operated simultaneously or sequentially to generate alarm sounds of various tones.

However, equipping a vehicle with two or more horns increases the price of the vehicle, and also increases the number of operating devices in the vehicle driver's seat, making it easier to make mistakes in driving operations. There are drawbacks.

The present invention has been made in view of the above-mentioned circumstances, and it is an object of the present invention to provide an improved electric alarm system that can simultaneously generate alarm sounds of two or more tones.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

In the accompanying drawings, reference numeral 1 indicates a casing of an electric horn according to the present invention, and a solenoid coil 2 is fixed within the casing 1.

A solenoid core 3 is arranged at the center of the solenoid coil 2, and a single diaphragm 5 is fixed to a center shaft 4 that is integrated with the solenoid core 3.

The diaphragm 5 is fixed to the casing 1 at its outer peripheral edge,
It can move together with the center shaft 4 only in its central portion.

An armature 6 is also attached to the center shaft 4 and is sandwiched between the solenoid core 3 and the diaphragm 5, and the armature 6 is configured to engage with a contact 7a of a interrupter 7 fixed in the casing 1. is placed inside the casing.

The interrupter 7 is electrically connected to the excitation circuit of the solenoid coil 2 by a lead wire 8, and the interrupter 7 is connected to its contact 7.
When a engages the armature 6, the solenoid coil 2
is operated to cut off the input current to the

A first sounding plate 10 is also attached to the center shaft 4 with a buffer material 9 (this may be made of a flexible material such as rubber) interposed between the center shaft 4 and the diaphragm 5. A second resonance plate 12 is attached between the two and a vibration interference prevention member 11.

Of these resonators, the first resonator 10 has a relatively low fundamental frequency, for example between 1400H2 and 150H2.
0Hz), the second sounding plate 12 has a relatively high fundamental frequency (
For example, it has a frequency of 1800 Hz).

On the other hand, the diaphragm 5 that causes these resonance plates 10 and 12 to vibrate has a fundamental frequency much lower than the fundamental frequency of these resonance plates 10 and 12 (for example, 340H2 to 360H2).
Hz).

The vibration interference prevention member 11 desirably has a fundamental frequency lower than the fundamental frequency of the diaphragm 5, and is manufactured from an appropriate material.

The operation of each part of the inventive horn having the structure described above is almost the same as that of a known electric horn, and the operation will be briefly explained as follows.

When the alarm switch (not shown) is turned on, current flows from the power supply to the solenoid coil 2, and the solenoid core 3, armature 6, and diaphragm 5 are moved downward in the figure, and the armature that was not in contact with it until then is moved downward. 6 and the contact 7a come into contact, and as a result, the contact 7a in the excitation circuit of the solenoid coil 2 is opened, and the solenoid coil 2 is demagnetized.

Therefore, the diaphragm 5, which was once displaced downward in the figure along with the armature 6, returns to its original position due to its own elasticity, and at the same time, the solenoid core 3 and armature 6 also return to their original positions, and the contact points 7a and armature 6
The engagement with is also released.

Therefore, the solenoid coil 2 is connected to the power supply again and the above operation is repeated.

As a result, the diaphragm 5 is vibrated, and the sound waves generated as a result of the vibration of the diaphragm 5 cause the first resonance plate 10 to resonate and generate a sound of a first tone.

As the first sounding plate 10 vibrates, the second sounding board 1
2 is vibrated, so that the second sounding plate 1
2 also vibrates and a second tone of sound is generated.

At this time, the vibration interference prevention member 11 interposed between the two resonance plates 10 and 12 prevents both the resonance plates from dissipating, thereby preventing both the resonance plates from vibrating at the same frequency.

As explained above, according to the present invention, it is possible to obtain an electric alarm horn that is inexpensive and capable of simultaneously generating alarm sounds of two or more tones.

[Brief explanation of the drawing]

The accompanying drawing is a longitudinal sectional view of the electric horn according to the present invention, with the front cover removed. 1...Casing, 2...Solenoid coil, 3...Solenoid core, 4...
・Center shaft, 5... Vibration plate, 6...
... Armature, 7 ... Interrupter, 10,1
2... Resonance plate, 11... Interference prevention member.

Claims (1)

[Scope of utility model registration request] a horn casing, a solenoid coil fixed in the horn casing, a solenoid core driven by excitation of the solenoid coil, and a center shaft fixed to a center shaft integrated with the solenoid core and driven by excitation of the solenoid coil. an armature that is driven in the axial direction of the center shaft in response to the current, and an interrupter that is electrically connected to the solenoid coil and contacts the armature when the solenoid coil is energized to interrupt the input current to the solenoid coil. and a single diaphragm fixed to the center shaft,
An electric alarm horn characterized in that two or more sounding plates having mutually different fundamental frequencies are fixed to the center shaft via a vibration interference prevention member.