CN2330043Y - Electric horn for vehicle - Google Patents

Abstract

The utility model relates to an electric horn for vehicle, belonging to the sound production instrument in the physical department of the international patent classification. The utility model comprises an IC which is NE555, a square wave oscillator which is composed of C < 1 >, C < 2 >, R < 1 > and W, an amplifier which is composed of T < 1 > and T < 2 > and is used for amplifying an output current, a loudspeaker S < 1 > and a digital sound integrated circuit B. The electric horn for vehicle has the advantages of simple structure, low cost, stable and reliable performance, adjustable tone and convenient use, and can not need debugging. The electric horn for vehicle can be connected with a digital sound IC to play the action of switching power amplifier.

Description

A kind of automobile-used electric horn

The utility model " a kind of automobile-used electric horn " belongs to sound equipment in the International Classification of Patents physical department.

Known Chinese utility model patent ZL95246637.2 number digital multi-tone contactless electronic vehicle horn is disclosed, it comprises king oscillator, frequency divider, pulse width former, power amplifier and sound generator, and this electronic horn duty is stable, tonequality is graceful, loudness is higher.

The purpose of this utility model provides a kind of stable performance, can exempt from debugging, cost is low, tone stablize adjustable, and can connect with other digital sounds IC, play the electric horn of close power amplifier effect.

The concrete structure of this electric horn as shown in Figure 1, wherein IC is NE555, in circuit with C ₁, C ₂, R ₁, W forms square-wave oscillator, the output of 3 pin, T ₁And T ₂Constitute amplifier in order to amplify output current, A point the right meets loudspeaker S among the figure ₁, also can add piezoelectric ceramics loudspeaker S by the transformer among the right figure ₂Replace, B is the digital sound integrated circuit.

The advantage of this automobile-used electric horn:

1, stable and reliable for performance;

2, can exempt from debugging;

3, with low cost;

4, tone is stablized adjustable, easy to use;

5, can connect with other digital sounds IC, play the effect of close power amplifier.

Description of drawings: Fig. 1 is the circuit diagram of automobile-used electric horn, and wherein B is the digital sound integrated circuit, S ₁Be loudspeaker, S ₂For transformer adds the piezoelectric ceramics loudspeaker.

This automobile-used electric horn embodiment: IC is NE555, C ₂Be 103, C ₃Be 104,, C ₄=220-1000 μ F, T ₁And T ₂For IC more than or equal to 2A, β is more than or equal to 20 npn, pnp transistor, S=4.

Claims (2)

1, a kind of automobile-used electric horn is characterized in that it comprises that IC is NE555, by C ₁, C ₂, R ₁, W forms square-wave oscillator, T ₁And T ₂The amplifier that constitutes in order to the amplification output current, loudspeaker S and digital sound integrated circuit B.

2,, it is characterized in that loudspeaker S can add piezoelectric ceramics loudspeaker S with transformer according to the described automobile-used electric horn of claim 1 ₂Replace.

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