CN2226332Y

CN2226332Y - Contactless electronic vehicle hooter

Info

Publication number: CN2226332Y
Application number: CN 95211936
Authority: CN
Inventors: 颜本善
Original assignee: Individual
Current assignee: Individual
Priority date: 1995-05-22
Filing date: 1995-05-22
Publication date: 1996-05-01
Anticipated expiration: 2005-05-22

Abstract

The utility model discloses a contactless electronic vehicle hooter, which comprises a DC power supply, a loudspeaker and an electronic circuit which is composed of an oscillator and a power amplifier. The output end of the oscillator is connected with the input end of the power amplifier, the output end of the power amplifier is connected with the loudspeaker, and the DC power supply is respectively connected with the oscillator, the power amplifier and the loudspeaker. The utility model is widely applied to vehicles.

Description

The contactless electronic loudspeaker that is used for automobile

The utility model relates to a kind of contactless electronic loudspeaker that is used for automobile.

The electric horn that is used for automobile at present all is to adopt the contact electric horn basically, contact and loudspeaker that this contact electric horn is made up of two sheet metals are formed by connecting, on the contact that described two sheet metals are formed, also be welded with platinum, therefore this contact electric horn has the cost height, rapid wear, shortcoming such as serviceable life is short.

The purpose of this utility model is to provide a kind of cost lower, the contactless electronic loudspeaker of long service life.

The purpose of this utility model is achieved in that this contactless electronic loudspeaker comprises a direct current power supply and a loudspeaker, it is characterized in that it also comprises the electronic circuit that an oscillator and a power amplifier are formed, the output terminal of described oscillator is connected with the input end of described power amplifier, the output terminal of described power amplifier is connected with described loudspeaker, described direct supply respectively with described oscillator, power amplifier is connected with speaker.

The utility model is owing to establish an electronic circuit of being made up of oscillator and power amplifier in car horn, substituting original mechanical contact and to send the satisfactory audio frequency and the sound intensity by loudspeaker, thus the utility model not only to have a cost low but also have advantage such as long service life.

Concrete structure of the present utility model is provided by following embodiment and accompanying drawing thereof.

Fig. 1 is the electrical schematic diagram according to the contactless electronic loudspeaker that the utility model proposes.

Describe structure in detail below in conjunction with Fig. 1 according to the concrete contactless electronic loudspeaker that the utility model proposes.

This contactless electronic loudspeaker is by a loudspeaker RfZ, and a direct current power supply also comprises a current-limiting resistance R in this power supply ₄With a voltage stabilizing diode D ₁, an oscillator is by time integrated circuit IC ₁, resistance R ₁, R ₂And capacitor C ₁Form and by resistance R ₃With a Darlington transistor BG ₁The power amplifier of forming is formed; Described resistance R ₄An end link to each other this resistance R with the input end of described direct supply ₄The other end and voltage stabilizing diode D ₁Negative pole join described voltage stabilizing diode D ₁Plus earth;

Described resistance R ₁, R ₂And capacitor C ₁Series connection successively, described time integrated circuit IC ₁Pin 7, pin 2 and pin 6 are connected to described resistance R ₂Two ends, described resistance R ₁An end and time integrated circuit IC ₁Pin 4 and pin 8 all be connected described resistance R ₄With voltage stabilizing diode D ₁Negative pole between, described capacitor C ₁The other end and integrated circuit (IC) ₁Pin 1 ground connection, described time integrated circuit IC ₁Pin 3 as the output terminal of described oscillator and the resistance R in the described power amplifier ₃One end links to each other, this resistance R ₃The other end and described Darlington transistor BG ₁Base stage join, the collector of described Darlington transistor links to each other with described loudspeaker RfZ, this manages BG ₁Grounded emitter, or described Darlington transistor BG ₁Emitter link to each other with described loudspeaker RfZ, this manages BG ₁Grounded collector.

Described time integrated circuit IC ₁Can adopt NE7555 or NE555; Or SG207; DWL9100, DWL9101, BA225F, BA226F etc.

The principle of work of this contactless electronic loudspeaker is described below:

When the moment of energized, the IC of described time integrated circuit ₁Pin 3 output high level, power supply is to capacitor C simultaneously ₁Capacitor C is worked as in charging ₁On voltage when reaching certain value, described integrated circuit (IC) ₁Pin 3 outputs transfer low level to, make described IC simultaneously ₁Pin 7 conductings, capacitor C ₁Capacitor C is worked as in discharge ₁After the discharge, when voltage is reduced to certain value, described integrated circuit pin 3 transfers high level output to by low level again, fast charging and discharging like this, form one and simulate sound signal on described integrated circuit pin 3, its audio frequency can be set in 300-400Hg, simulates sound signal and amplifies through Darlington transistor described, electric current can be amplified to about 3 amperes from 2.5 milliamperes, and the big like this power that electric current produced is enough to promote the sound film of loudspeaker sounding.

Claims

1. contactless electronic loudspeaker that is used for automobile, comprise a direct current power supply, with a loudspeaker, it is characterized in that it also comprises the electronic circuit that an oscillator and a power amplifier are formed, the output terminal of described oscillator is connected with the input end of described power amplifier, and the output terminal of described power amplifier is connected with described loudspeaker, described direct supply is connected with described oscillator, power amplifier and loudspeaker respectively.

2. electronic horn according to claim 1 is characterized in that also being provided with in the described direct supply current-limiting resistance R ₄With a voltage stabilizing diode D ₁, described resistance R ₄An end link to each other this resistance R with the input end of described direct supply ₄The other end and voltage stabilizing diode D ₁Negative pole join described voltage stabilizing diode D ₁Plus earth.

3. electronic horn according to claim 1 is characterized in that described oscillator is by time integrated circuit IC ₁, resistance R ₁, R ₂And capacitor C ₁Form; Described resistance R ₁, R ₂And capacitor C ₁Series connection successively, described time integrated circuit IC ₁Pin 7, pin 2 and pin 6 are connected to described resistance R ₂Two ends, described resistance R ₁An end and time integrated circuit IC ₁Pin 4 and pin 8 all be connected described resistance R ₄With voltage stabilizing diode D ₁Negative pole between, described capacitor C ₁The other end and integrated circuit (IC) ₁Pin 1 ground connection, described time integrated circuit IC ₁Pin 3 link to each other with the input end of described power amplifier as the output terminal of described oscillator.

4. electronic horn according to claim 1 is characterized in that described power amplifier is by resistance R ₃With a Darlington transistor BG ₁Form; Described resistance R ₃An end and described Darlington transistor BG ₁Base stage link to each other this resistance R ₃The other end and described time integrated circuit IC ₁Pin 3 link to each other described Darlington transistor BG ₁Collector link to each other with the described electrical equipment RfZ that raises, this manages BG ₁Grounded emitter, perhaps described Darlington transistor BG ₁Emitter link to each other with described loudspeaker RfZ, this manages BG ₁Grounded collector.