CN218122981U - Electric motor car horn device - Google Patents
Electric motor car horn device Download PDFInfo
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- CN218122981U CN218122981U CN202221943385.1U CN202221943385U CN218122981U CN 218122981 U CN218122981 U CN 218122981U CN 202221943385 U CN202221943385 U CN 202221943385U CN 218122981 U CN218122981 U CN 218122981U
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Abstract
The utility model relates to an electric motor car technical field, concretely relates to electric motor car horn device, including triggering detection circuit, audio frequency generating circuit, audio frequency amplifying circuit and DC converter, triggering detection circuit is used for detecting the loudspeaker button and whether triggered, audio frequency generating circuit is used for producing audio drive signal, audio frequency amplifying circuit includes one-level amplifying circuit and second grade amplifying circuit, one-level amplifying circuit is with audio drive signal's current amplification, amplify audio drive signal's voltage to fundamental voltage simultaneously, fundamental voltage is provided by the output of DC converter, second grade amplifying circuit amplifies one-level amplifying circuit's output voltage and drives loudspeaker work, loudspeaker are piezoelectric type buzzing piece. The utility model provides a pair of electric motor car horn device, loudspeaker adopt piezoelectric type buzzing piece, and drive circuit simple structure, the low power dissipation to sound loudness is big, and the product is small.
Description
Technical Field
The utility model relates to an electric motor car technical field, concretely relates to electric motor car horn device.
Background
The electric bicycle is popular with people who travel in short distance due to the advantages of lightness, energy conservation, environmental protection and the like, and the quantity of the electric bicycle in China currently exceeds 2.5 hundred million and is in a situation of increasing year by year. The electric bicycles on the market have various types and brands, but the electric systems of the electric bicycles are basically the same.
Wherein, the loudspeaker of electric motor car generally adopts electromagnetic vibration formula, and its inside has a set of coil, and the coil circular telegram back produces magnetic field, and the actuation vibrating diaphragm sound production, though this kind of loudspeaker have advantages such as simple structure, sound are big, easy warranty, still have certain problem: 1. the working current is large, and the power consumption is high; 2. the contact is easy to corrode and oxidize, and the horn switch and the circuit thereof are easy to damage; 3. when the electromagnetic interference is large, other equipment of the vehicle is easy to work abnormally.
The utility model discloses a utility model patent that publication number is CN203456089U discloses a loudspeaker of motorcycle electric motor car low-power consumption, through time base circuit IC1 output low-power audio signal, then drive high pitch moving coil loudspeaker YS sound production through the compound pipe power amplifier circuit amplification that three triode is constituteed, though reduced power to a certain extent, the reduction range is less, and the consumption of loudspeaker itself is still higher, and the drive circuit structure is also comparatively complicated.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve technical problem such as the consumption height that electric motor car loudspeaker exist among the prior art, structure complicacy, provide an electric motor car loudspeaker device, loudspeaker adopt piezoelectric type buzzing piece, drive circuit simple structure, the low power dissipation to sound volume is big, and the product is small.
The utility model adopts the technical proposal that:
an electric vehicle horn device comprising:
the trigger detection circuit is used for detecting whether the horn key is triggered or not and sending a trigger signal to the audio generation circuit when the horn key is triggered;
an audio generation circuit for generating an audio drive signal;
the audio amplifying circuit comprises a primary amplifying circuit and a secondary amplifying circuit, the primary amplifying circuit amplifies the current of the audio driving signal and amplifies the voltage of the audio driving signal to a basic voltage, the secondary amplifying circuit amplifies the output voltage of the primary amplifying circuit and drives a loudspeaker to work, and the loudspeaker is a piezoelectric buzzer;
the input end of the DC converter is connected with a storage battery of an electric vehicle, and the output end of the DC converter is connected with the primary amplifying circuit to provide the basic voltage.
Further, the first-stage amplifying circuit comprises a triode Q3, the second-stage amplifying circuit comprises a transformer U3, the triode Q3 is an NPN triode, a base of the triode Q3 is connected with the audio generating circuit and receives the audio driving signal, an emitter of the triode Q3 is grounded, a collector of the triode Q3 is connected with one end of an input side of the transformer U3, the other end of the input side of the transformer U3 is connected with an output end of the DC converter, and two ends of an output side of the transformer U3 are connected with the horn.
Further, the trigger detection circuit adopts negative control triggering.
Further, the trigger detection circuit comprises a resistor R17, a resistor R18, a diode D4 and a voltage regulator tube D3, wherein a first end of the resistor R17 is connected to an output end of the DC converter, a second end of the resistor R17 is connected to a first end of the resistor R18, a cathode of the voltage regulator tube D3 and a power supply end of the audio generation circuit, an anode of the voltage regulator tube D3 is grounded, a second end of the resistor R18 is connected to an anode of the diode D4 and an input detection IO port of the audio generation circuit, and a cathode of the diode D4 is connected to the horn key.
Further, the trigger detection circuit adopts positive control triggering.
Further, the trigger detection circuit comprises a resistor R7, a first end of the resistor R7 is connected with the horn key, and a second end of the resistor R7 is connected with a power supply end of the audio generation circuit.
Furthermore, the audio frequency generation circuit adopts a timer, an oscillator or a singlechip.
Further, a resistor R9 is arranged between the base of the triode Q3 and the audio generating circuit, and a resistor R19 is arranged between the base and the emitter of the triode Q3.
Further, the output side of the transformer U3 is further provided with a resistor R16, and the resistor R16 is connected in parallel with the horn.
Further, the DC converter includes a switch control chip U1, the switch control chip U1, a switching device, a diode, an inductor, and a capacitor form a step-down circuit, and the DC converter converts the voltage of the battery into a 12V voltage.
The utility model has the advantages that: the utility model discloses an electric motor car horn device drives the loudspeaker sound production through setting up trigger detection circuit, audio frequency generating circuit and audio amplification circuit, and loudspeaker are piezoelectricity buzzing piece, and power is very little, and its electric current only is 0.1A, and the electric current of loudspeaker reduces to 0.1A, power greatly reduced from 3A. And, the utility model provides an audio amplification circuit passes through triode Q3 and enlargies audio drive signal, triode Q3's load is a transformer U3 that steps up, the signal after will enlarging further steps up, make the voltage at piezoelectricity buzzing piece both ends rise, sound is louder, can reach electromagnetic horn's effect, regard the output voltage of DC converter as transformer U3 input side's the enlarged basic voltage, make loudspeaker work more stable, and because loudspeaker are piezoelectricity buzzing piece, low power, make the power of DC converter also synchronous reduction, the product volume also reduces greatly.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic block diagram of the horn device of the electric vehicle of the present invention;
fig. 2 is a schematic circuit diagram of the trigger detection circuit, the audio generation circuit and the audio amplification circuit of the present invention;
fig. 3 is a schematic circuit diagram of the DC converter of the present invention.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in fig. 1-3, the present embodiment provides an electric vehicle horn device, which includes a trigger detection circuit, an audio generation circuit, and an audio amplification circuit, wherein the trigger detection circuit is configured to detect whether a horn button on an electric vehicle is triggered to determine whether a horn sounds, a triggering manner is selectable but not limited to ground triggering (negative control) or voltage triggering (positive control), and a trigger signal is sent to the audio generation circuit when triggered; the audio generating circuit is used for generating an audio driving signal when receiving the trigger signal; the audio amplification circuit amplifies the audio driving signal and then drives the loudspeaker to work, specifically, the audio amplification circuit comprises a primary amplification circuit and a secondary amplification circuit, the primary amplification circuit amplifies the current of the audio driving signal and amplifies the voltage of the audio driving signal to a basic voltage, the secondary amplification circuit further amplifies the output voltage of the primary amplification circuit and drives the loudspeaker to work, and the loudspeaker is a piezoelectric buzzer; the electric vehicle horn device of the embodiment further comprises a DC converter, wherein the input end of the DC converter is connected with a storage battery of the electric vehicle, and the output end of the DC converter after voltage reduction is connected with a first-level amplifying circuit to provide the basic voltage.
The DC converter of electric motor car, its main effect be with electric motor car battery voltage for external electrical appliances such as lamps and lanterns, instrument and loudspeaker use as 12V voltage conversion, the DC converter on the existing market mostly is 12V 6A output, wherein 3A reserves for the loudspeaker, and the operating current of visible loudspeaker is big, and power is big to it is also great to lead to the power of converter.
The electric vehicle horn device of the embodiment drives the piezoelectric buzzer piece to sound by setting the trigger detection circuit, the audio generation circuit and the audio amplification circuit, the piezoelectric buzzer piece is used for sticking the piezoelectric ceramic piece after high-voltage extreme pressure is formed on the vibrating metal piece, and after voltage is added, mechanical deformation extension and contraction can be generated due to piezoelectric effect, and the metal piece is vibrated by utilizing the characteristic to make a sound. The power of the piezoelectric buzzer is very low, the current of the piezoelectric buzzer is only 0.1A, the current of the horn is reduced from 3A to 0.1A, the power is greatly reduced, the service life is long, and the normal work of other devices cannot be influenced. Further, audio amplifier circuit in this embodiment passes through one-level amplifier circuit and enlargies audio drive signal, with its current amplification and rise its voltage to basic voltage, audio amplifier circuit still includes second grade amplifier circuit, further rise one-level amplifier circuit's output voltage, make the voltage at piezoelectricity buzzing piece both ends higher, sound is louder, can reach electromagnetic horn's effect, and regard the output voltage of DC converter as above-mentioned basic voltage, make loudspeaker work more stable, and because loudspeaker are piezoelectricity buzzing piece, low power, make the power of DC converter also synchronous reduction, the product volume also reduces greatly.
As a specific implementation manner of this embodiment, the first-stage amplifying circuit in the audio amplifying circuit includes a transistor Q3, the second-stage amplifying circuit includes a transformer U3, the transistor Q3 is an NPN transistor, a base of the transistor Q3 is connected to the audio generating circuit and receives the audio driving signal, an emitter of the transistor Q3 is grounded, a collector of the transistor Q3 is connected to one end of an input side of the transformer U3, the other end of the input side of the transformer U3 is connected to an output end of the DC converter, and two ends of an output side of the transformer U3 are connected to a speaker. Like this, one-level amplifier circuit passes through triode Q3 and enlargies audio drive signal to with the voltage rise to basic voltage, triode Q3's load is the transformer U3 that a boosts after that, further boosts one-level amplifier circuit's output voltage, makes the voltage at piezoelectricity buzzer piece both ends rise, and sound is more loud, can reach electromagnetic horn's effect.
As an implementation manner of this embodiment, the trigger detection circuit adopts a negative control trigger manner, the audio generation circuit adopts a single chip microcomputer U2, and specifically, as shown in fig. 2, the trigger detection circuit includes a resistor R17, a resistor R18, a diode D4, and a voltage regulator tube D3, but does not include a resistor R7 and a resistor R20 (that is, the resistor R7 and the resistor R20 are not attached and are open-circuited in this implementation manner), a first end of the resistor R17 is connected to an output end of the DC converter, a second end of the resistor R17 is connected to a cathode of the voltage regulator tube D3 and a power supply end of the audio generation circuit, an anode of the voltage regulator tube D3 is grounded, the voltage regulator tube D3 is 5V, the voltage regulator tube provides a working voltage for the audio generation circuit, and a capacitor C6 is further connected in parallel at two ends of the voltage regulator tube D3, so that the working voltage is stable. Further, a second end of the resistor R17 is further connected to a first end of the resistor R18, a second end of the resistor R18 is connected to an anode of the diode D4 and an input detection IO port of the audio generation circuit, a cathode of the diode D4 is connected to one end of the horn key, the other end of the horn key is grounded, when the horn key is not triggered, the input detection IO port of the single chip microcomputer U2 is at a high level, and at this time, an audio driving signal is not output; when the loudspeaker button triggered, singlechip U2's input detection IO mouth was the low level, and output audio drive signal this moment can prevent through diode D4 that external voltage from pouring into singlechip U2 into.
As another embodiment of this embodiment, the trigger detection circuit adopts a positive control trigger mode, the audio generation circuit adopts a single chip microcomputer U2, and specifically, as shown in fig. 2, the trigger detection circuit includes a resistor R7 and a voltage regulator tube D3, but does not include a resistor R17, a resistor R18 and a diode D4 (i.e., the resistor R17, the resistor R18 and the diode D4 are not attached and are open-circuited in this embodiment), the first end of the resistor R7 is connected to one end of the horn button, the other end of the horn button is connected to a power supply, the second end of the resistor R7 is connected to a power supply end of the audio generation circuit, at this time, the single chip microcomputer U2 is not in a pin check state, when the horn button is not triggered, the single chip microcomputer U2 is not in a voltage, and at this time, an audio driving signal is not output; when the horn key is triggered, the singlechip U2 is powered on, and at the moment, an audio driving signal is output. The circuit is simple in the mode, and the number of components is less.
For the audio generating circuit, the specific model of the single chip microcomputer U2 is HS2300-PE in this embodiment, and certainly, in other embodiments, single chip microcomputers of other models may be selected, and the above functions may be implemented, or in other embodiments, a timer or an oscillator may be used to provide a required driving waveform signal.
For the audio amplifying circuit, a resistor R9 and a current-limiting protection triode Q3 are also arranged between the base electrode of the triode Q3 and the audio generating circuit; a resistor R19 is also arranged between the base electrode and the emitting electrode of the triode Q3, and the pull-down grounding can prevent misoperation. Further, the output side of the transformer U3 is also provided with a resistor R16, the resistor R16 is connected with the loudspeaker in parallel, the counter electromotive force is consumed, the high-frequency response is improved, and the safety of the output side circuit is protected.
As shown in fig. 3, the DC converter includes a switching control chip U1 and a peripheral circuit thereof, the model of the switching control chip U1 is U3500, and the switching control chip U1, a switching device Q1, a diode Q2, an inductor, a capacitor, and other peripheral circuits form a step-down circuit to convert the battery voltage to 12V.
In conclusion, the electric vehicle horn device provided by the embodiment can be used for an electric two-wheel vehicle or an electric three-wheel vehicle, the horn adopts the piezoelectric buzzer, the driving circuit is simple in structure, low in power consumption, large in sound loudness, and small in product size.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing circuits, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and various modifications and improvements made by the technical solutions of the present invention by those skilled in the art should fall within the protection scope defined by the claims of the present invention without departing from the design spirit of the present invention.
Claims (10)
1. An electric vehicle horn device, comprising:
the trigger detection circuit is used for detecting whether the horn key is triggered or not and sending a trigger signal to the audio generation circuit when the horn key is triggered;
an audio generation circuit for generating an audio drive signal;
the audio amplifying circuit comprises a primary amplifying circuit and a secondary amplifying circuit, the primary amplifying circuit amplifies the current of the audio driving signal and amplifies the voltage of the audio driving signal to a basic voltage, the secondary amplifying circuit amplifies the output voltage of the primary amplifying circuit and drives a loudspeaker to work, and the loudspeaker is a piezoelectric buzzer;
the input end of the DC converter is connected with a storage battery of the electric vehicle, and the output end of the DC converter is connected with the primary amplifying circuit to provide the basic voltage.
2. The electric vehicle horn device of claim 1, wherein the primary amplifying circuit comprises a transistor Q3, the secondary amplifying circuit comprises a transformer U3, the transistor Q3 is an NPN transistor, a base of the transistor Q3 is connected to the audio generating circuit and receives the audio driving signal, an emitter of the transistor Q3 is grounded, a collector of the transistor Q3 is connected to one end of an input side of the transformer U3, the other end of the input side of the transformer U3 is connected to an output end of a DC converter, and two ends of an output side of the transformer U3 are connected to the horn.
3. The electric vehicle horn device according to claim 1 or 2, wherein the trigger detection circuit employs a negative control trigger.
4. The electric vehicle horn device according to claim 3, wherein the trigger detection circuit comprises a resistor R17, a resistor R18, a diode D4 and a voltage regulator tube D3, a first end of the resistor R17 is connected with an output end of the DC converter, a second end of the resistor R17 is connected with a first end of the resistor R18, a cathode of the voltage regulator tube D3 and a power supply end of the audio generation circuit, an anode of the voltage regulator tube D3 is grounded, a second end of the resistor R18 is connected with an anode of the diode D4 and an input detection IO port of the audio generation circuit, and a cathode of the diode D4 is connected with the horn key.
5. The electric vehicle horn device of claim 1 or 2, wherein the trigger detection circuit employs positive control triggering.
6. The electric vehicle horn device according to claim 5, wherein the trigger detection circuit comprises a resistor R7, a first end of the resistor R7 is connected to the horn button, and a second end of the resistor R7 is connected to a power supply end of the audio generation circuit.
7. The electric vehicle horn device of claim 1, wherein the audio generating circuit employs a timer, an oscillator, or a single chip microcomputer.
8. The electric vehicle horn device according to claim 2, wherein a resistor R9 is further provided between the base of the transistor Q3 and the tone generating circuit, and a resistor R19 is provided between the base and the emitter of the transistor Q3.
9. The electric vehicle horn device according to claim 2, wherein a resistor R16 is further provided at the output side of the transformer U3, and the resistor R16 is connected in parallel with the horn.
10. The electric vehicle horn device according to claim 1 or 2, wherein the DC converter comprises a switching control chip U1, the switching control chip U1 and a switching device, a diode, an inductor, and a capacitor constitute a step-down circuit, and the DC converter converts the voltage of the secondary battery into a 12V voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221943385.1U CN218122981U (en) | 2022-07-26 | 2022-07-26 | Electric motor car horn device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221943385.1U CN218122981U (en) | 2022-07-26 | 2022-07-26 | Electric motor car horn device |
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| Publication Number | Publication Date |
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| CN218122981U true CN218122981U (en) | 2022-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221943385.1U Active CN218122981U (en) | 2022-07-26 | 2022-07-26 | Electric motor car horn device |
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| CN (1) | CN218122981U (en) |
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- 2022-07-26 CN CN202221943385.1U patent/CN218122981U/en active Active
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