What is the structure and principle of the car electric horn?

The electric horn consists of a horn barrel.

It is composed of sounding plate, diaphragm, base plate, iron core, spring sheet, armature, center rod, coil, fixed contact, movable contact, capacitor, button, etc. The structure and working principle of the electric horn is: press the steering wheel.

When the horn button is on, its power circuit is the positive pole of the battery, the line of the movable contact arm, the contact of the fixed contact arm, the button of the negative pole of the battery. When the current passes through the coil, the iron core magnetizes and absorbs the armature, so the adjustment nut on the center rod presses down on the movable contact arm, so that the contacts are separated and cut off the open circuit, and then the electromagnetic force is followed.

disappears, and under the action of the spring plate and the elastic force of the vibrating membrane, the armature falls back into place, the contact is closed, and the circuit is turned on again. In this cycle, the diaphragm vibrates continuously to emit a tonal sound wave, which is reinforced by the horn barrel.

Car horns emit only a single tone, and its construction is different from that of audio speakers (speakers). Audio speakers are sounded by the vibration of a paper disc diaphragm, while car horns are sounded by a metal diaphragm.

There are two kinds of car horns: electric horns and air horns, the electric horns are constantly energized and powered off through the electromagnetic coil, so that the metal diaphragm vibrates and produces sound, and the sound is pleasant. The shape of the electric horn is mostly spiral and basin shape, which is widely used in various automobiles. Light passenger cars are equipped with electric horns.

The air horn uses the airflow of compressed air to make the metal diaphragm vibrate, the shape is mostly long horn (cylindrical), the sound is loud and the sound tone is high, the propagation distance is long, and it is mostly used in large and medium-sized cars that run long distances, and it is forbidden in the city.

The spiral car horn comes with a speakerphone, which is rolled into a spiral shape to compress the volume, and the sound quality is beautiful and loud. The basin car horn does not have a speaker, the shape is flat, the volume is small, the weight is light and easy to install, the sound quality is slightly inferior but it is widely used.

What is the structure and principle of the car horn It has an electric coil that is charged and vibrated to occur.

Under normal circumstances, I think that if the car electric horn is encountered, if this situation is encountered, this principle is mainly in three aspects, and the cost performance is still very good.

The structure and principle of the electric horn of the car are actually the same, and you should choose a more convenient structural principle to use.

1. Function. Signal pedestrians and other vehicles to attract attention and ensure driving safety.

2. Types. Classification by energy used:

Air horn: the use of air flow to vibrate the metal diaphragm to make a sound, used in trucks with air brakes;

Electric horn: The use of electromagnetic coils to vibrate the metal diaphragm to produce sound, is widely used at present.

Horn: A multivibrator and power amplifier composed of transistors are used to push the diaphragm to move and make sounds.

Classified by shape:

Cylindrical: With the speaker as the resonant body, the sound efficiency is high, the timbre is beautiful, the installation space is large, and it is mostly used for air horns.

Spiral: The principle is the same as that of the barrel, but with a beautiful timbre and a small footprint.

Basin: small size, light weight, good directionality, low noise.

Generally, in addition to the nominal voltage (such as 12V, 24V), there is also an indicator of the car horn is the volume, that is, the speaker decibels. And we choose the horn is also the main consideration of the decibel value, the higher the decibel value, the louder the horn.

General electric horn, 80 110 decibels belong to the tweeter; 80 50 dB belongs to the woofer.

Don't worry about the power when choosing the speaker, all the speaker power is below 30W.

The current value of the horn is around 2 3A.

Working principle: The car electric horn relies on the vibration of the metal diaphragm to produce sound. The automotive electric horn is composed of an iron core, a magnetic coil, a contact, an armature, a diaphragm, etc.

When the driver presses the horn switch, the current passes through the coil through the contact, the coil produces a magnetic force to attract the armature, forces the diaphragm to move, the armature moves to disconnect the contact, the current is interrupted, the magnetic force of the coil disappears, the diaphragm recovers its original position together with the armature under the action of its own elasticity and spring sheet, the contact closure circuit is turned on again, and the current flows through the contact through the empty mass chaotic coil to generate magnetic force, repeat the above action.

This is repeated and the diaphragm vibrates continuously, resulting in a sound sound. The resonance or rigid connection between the plate and the diaphragm makes the vibration smooth and more pleasant to the ear (i.e., the bucket magnet principle).

The electric horn of the automobile is to use the current through the contact through the coil, the coil produces a magnetic force to absorb the armature, force the diaphragm to move, the armature moves to break the contact with the disadvantages, the current is interrupted, the magnetic force of the coil disappears, the diaphragm recovers its original position together with the armature under the action of its own elasticity and spring sheet, the contact closed circuit is turned on again, and the current flows through the contact through the coil to generate magnetic force, repeating the above action. This is repeated and the diaphragm vibrates continuously, resulting in a sound sound.

The working principle of the car horn is: the car electric horn makes sound through the vibration of the metal diaphragm, which is composed of an iron core, a magnetic coil, a contact, an armature, a diaphragm, etc. When the driver presses the horn switch, current flows through the contacts through the coil, which creates a magnetic force that pulls on the armature, forcing the diaphragm to move.

When the armature moves, the contact is disconnected, the current is interrupted, the magnetic force of the coil disappears, the diaphragm returns to its original position with the armature under the action of its own elasticity and spring sheet, the contact closure circuit is turned on again, and the current flows through the contact through the coil to generate magnetic force, which produces sound.

Car horns are divided into air horns and electric horns according to sound power; Depending on its appearance, it can be divided into three types: cylindrical, spiral, and basin. Depending on the frequency of vocalization, there are two types: treble and bass.

The working principle of the air horn is to use the air flow of compressed air to vibrate the metal diaphragm and make sound, so it is necessary to use an air compressor above the car. Generally, buses and heavy trucks are equipped with air horns, especially when long-distance transport vehicles are driving in mountainous areas or curves, air horns can effectively remind pedestrians and drivers coming from the other side to pay attention. Because the air horn has a large volume, good after-effect, good sound, and long distance.

Air horns are generally cylindrical, and tweeters and woofers are used to work together.

The working principle of the electric horn is to use electromagnetic attraction to make the metal diaphragm vibrate and make sound. This is a type of horn that is widely used in automobiles. According to the structural form, it is divided into three types: cylindrical, spiral and basin, and is usually made into a spiral or basin.

The working principle of the car horn is: the car horn is made by the vibration of the metal diaphragm, and the car horn is composed of an iron core, a magnetic coil, a contact, an armature, a diaphragm, etc. When the driver presses the horn switch, the current passes through the coil through the contact, the coil generates a magnetic force to attract the armature, forces the diaphragm to move, the armature moves to disconnect the contact, the current is interrupted, the magnetic force of the coil disappears, the diaphragm recovers in place with the armature under the action of its own elasticity and spring sheet, the contact closure circuit is turned on again, and the current flows through the contact through the coil to generate magnetic force, so as to emit sound.

Car horns are divided into two types: air horns and electric horns according to sound power; According to its shape, it is divided into three types: cylindrical, spiral and basin; According to the frequency of sound, there are two types: tweeter and woofer.

The air horn works by using the air flow of compressed air to make the metal diaphragm vibrate and make a sound, so it must be able to be used above a car with an air compressor. Generally, buses and heavy trucks are equipped with air horns, especially when long-distance transport vehicles are driving in mountainous areas or curves, they use air horns to raise their horns, which can effectively remind pedestrians and other oncoming drivers to pay attention. Because the air horn has a loud volume, the aftersound is good, the sound is pleasant and spreads far.

The air horn is generally cylindrical and uses two horns, the treble and the bass, to work together.

The working principle of the electric horn is to use electromagnetic attraction to vibrate the metal diaphragm to produce sound. It is a kind of horn widely used in automobiles, which is divided into three types: cylindrical, spiral and basin according to the structural form, and is generally made into a spiral or basin. (Photo by photo:.)

Zeng Caihong) @2019