CN2052137U - Aatomatic sound-changeable contactless electronic loudspeaker - Google Patents

Abstract

A horn of vehicle is necessary equipment for all means of communication on road, and the annual consumption is very large. The utility model provides a horn which is controlled by an electronic device. The horn of the utility model is not provided with contacts, the tone is changeable, and the tone can be automatically changed or intermittently played. Thus, the operation is simple, and the frequency of actions of a horn relay is reduced. When automatically changing the tone, a bass tone can be created by pressing with a short time, and a high tone can be automatically converted by pressing with a longer time. Parameters can be properly selected, and then long and short 'Du-Du' tones can be created by continuously pressing. In addition, the tone can be once changed at a time, a short tone can be created at first, and then the tone is converted into a long tone until a hand moves away. Therefore, the horn is a multifunctional automatic acoustic horn, and the cost is similar to normal non-contact horns.

Description

Aatomatic sound-changeable contactless electronic loudspeaker

The invention belongs to a kind of automobile-used loudspeaker of blowing a trumpet.

Loudspeaker are devices of vehicles indispensability such as a kind of automobile, are used for sending warning signal when driving, with plan safety.Electric horn at present commonly used is a kind ofly to come the vibration sound-producing device of control coil electric current with pair of contact, because the big contact of electric current is damaged easily, uses not really desirable.In addition, it can only send the sound of certain frequency, certain sound level.Chinese patent " contactless electronic loudspeaker " (87214386.4) has proposed the different loudspeaker of a kind of principle of work, adopt electronic installation to come drive coil to make it sounding, thereby fully phased out contact system, solved the problem of spark ablation contact, improved reliability and prolonged the life-span.Because the parameter of electronic circuit can meticulously be regulated, therefore can cooperate well with the natural frequency of vibration of loudspeaker housing, make sound loud and clear melodious, can be adjusted in several different resonance point places consciously simultaneously, make it to send the sound of different sound levels and different frequency, to satisfy various needs.Can use high pitch when for example travelling in the open air, in the urban district or night running can use bass, to reduce city noise and environmental interference as far as possible.In view of the above, Chinese patent " multitone contactless electronic loudspeaker " (88201308) has proposed a kind of variable announcement loudspeaker, makes same loudspeaker to send out high pitch or bass according to different needs.But when operating, this loudspeaker need or stir reversing switch by different knobs, therefore slightly inconvenience in operation, and also inconvenient to some extent during installation, need carry out some repackings to vehicle.

The object of the present invention is to provide a kind of automatic sound change loudspeaker, its not only contactless, variable announcement, but and automatic sound change or automatic clipped.When pressing in short-term, for example in 1 second, it sends out lower sound, and the time is long slightly above 1 second, promptly transfers high pitch automatically to.Be adjusted to as two kinds of sound comparatively approximate, length sent out interrupted by loudspeaker when then pressing continuously " pouting ... pout ... " sound meets ordinary practice and has simplified operation, reduces the action frequency of knob and electric horn breaker point unit.Because loudspeaker all are paired uses, to produce the complex tone effect, the electric current about 3A is arranged during double horn work, and the loudspeaker that pipe all are intermittently to carry out usually, electric horn breaker point unit acts frequently and fragile.

Purpose proposed by the invention reaches like this: in electronic control system, installs a control generator additional and controls king oscillator, i.e. and the condition of work of the oscillator of drive coil, thus change the sound of loudspeaker.The degree of audible difference is by the parameter of control generator output pulse and the starting condition decision of king oscillator, can be very big also can be very little, the high and low sound of sending out interrupted when very big, then send out interrupted when very little " pouting ... pout ... " sound.The time of pressing is a bill sound very in short-term.Structure to control generator changes slightly, makes it to become the single oscillator, and then loudspeaker are only changed voice once.Not working as not installing control generator or making it, then is exactly common contactless high and low sound or the variable loudspeaker of high and low sound.

From the above mentioned as seen, loudspeaker provided by the present invention are actually a kind of multi-functional robotization loudspeaker, it has whole advantages of contactless loudspeaker, increase some automatic control function and obtained multiple effect, satisfy various needs, can simplify the operation again, prolong the term of life of electric horn breaker point unit.These functions can partly be selected for use or all keep.Because control generator is to utilize the vacant assembly of integrated package to form, no matter be to increase or reduce function, its difference is some resistances, hold element and diode etc., and how much cost only changes in the scope.

Below in conjunction with accompanying drawing loudspeaker provided by the present invention are described in further detail.

Accompanying drawing 1 is the horn structure sectional view.

Accompanying drawing 2 is control system schematic diagrams of loudspeaker.

In the accompanying drawing 1, the 1st, fixed core, the 2nd, set nut, the 3rd, support, the 4th, solenoid, the 5th, bonnet, the 6th, pressing plate, the 7th, moving unshakable in one's determination, the 8th, diaphragm, the 9th, resonance cover, the 10th, flat-top nut, the 11st, top, the 12nd, packing ring, the 13rd, front shroud, the 14th, screw, the 15th, electronic circuit board, the 16th, insulating mat, the 17th, lug plate, the 18th, yoke ring, the 19th, fixed core seat.Dynamic and static 7,1 usefulness permeability magnetic material unshakable in one's determination is made, and attracted and percussion mutually by the alternation of solenoid 4, makes diaphragm 8 produce high vibrations and pronounces.Fixed core 1 screws in from fixed core seat 19, regulate with moving unshakable in one's determination 7 between distance after, lock with set nut 2, support 3 also is fixed simultaneously.Solenoid 4 places bonnet 5, compresses with pressing plate 6.Two ends of pressing plate 6 are fixed on the bonnet 5.Diaphragm 8, moving unshakable in one's determination 7 is fixed together through packing ring 12 and resonance cover 9 usefulness flat-top nuts 10, with moving 7 motions unshakable in one's determination.Form a cavity between resonance cover 9 and the diaphragm 8, produce the resonance effect, add strong sound wave.Usefulness front shrouds 13 such as diaphragm 8 and resonance cover 9 compress the back and are fixed together with bonnet 5.Affixed method can be used screw, rivet or crimping, and rivet and crimping are affixed to be non-disconnectable type.Yoke ring 18 is made by permeability magnetic material pure iron, high permeability high resistivity ferrite or silicon steel sheet, is enclosed within outside the solenoid 4, with bonnet 5 driving fits, its effect is except that strengthening magnetic field, improving the volume, zinc is Mian horn housing physique amount slightly, reduces the natural frequency of vibration, enriches bass.Cavity between diaphragm 8 and the bonnet 5 completely cuts off with extraneous, as long as underwater paint is noted smearing in terminal screw 14, fixed core 1 and places such as front shroud 13 and bonnet 5 fixing positions or marine glue can prevent the moisture intrusion, do not make the damages of making moist such as electronic circuit board 15, solenoid 4.Top 11 is a kind of ornaments, and to beautify outward appearance, it can be made by chromatic ceramics, organic glass etc., and different colours can be represented the loudspeaker of different cultivars.

In the accompanying drawing 2, the 20th, switch, the 21st, control generator, the 22nd, king oscillator, the 23rd, reversing switch, the 24, the 25th, the oscillating element of king oscillator, they can be resistance or electric capacity, their parameter has nothing in common with each other.When king oscillator 22 was voltage controlled oscillator, then 24,25 was voltage divider, and their intrinsic standoff ratio has nothing in common with each other.26 is power transistor, and it can be single pipe, also can be complex pipe.The oscillation frequency of king oscillator 22 changes the oscillating element parameter by reversing switch 23 and changes, and is corresponding with the main point of self-oscillation and time point of self-oscillation of loudspeaker housing, thereby changes the volume and the frequency of sound, sends high pitch or bass respectively.Except frequency, the width or the symmetry of king oscillator 22 output pulses also have very big influence to sound.When pulse width or symmetry not simultaneously, the DC component that flows through solenoid 4 electric currents is different, thereby moving unshakable in one's determination 7 mobile equilibrium position is also different, the distance between dynamic and static unshakable in one's determination 7,1 is also different, thereby pronunciation is exerted an influence.Influence neglect the size that DC component changes greatly, i.e. the change degree of pulsewidth or symmetry and deciding.The different pulse of control generator 21 output width makes the width or the symmetry generation respective change of king oscillator 22 output pulses, thereby changes DC component, makes sound variation.The duration of two kinds of sound, one wide one is narrow by the output pulse width decision of control generator 21, and just one is long and the other is short for sound.If regulate to such an extent that make two kinds of audible difference little, just become automatic clipped, if difference is very big, just become high and low changing voice automatically.So, by control generator 21 control king oscillators 22, again by king oscillator 22 control control power transistors 26, with regard to may command sound.Control generator 21 output pulses can directly be sent into power transistor 26 with king oscillator 22, and its effect is the same.Control generator 21 can be an asymmetrical multivibrator, it is also unprincipled different with common multivibrator, just the charge and discharge road of electric capacity is separated, can be set up, the charge and discharge time as required respectively to obtain required gating pulse width with diode.Cut off its backfeed loop with switch 20, then no longer vibration just no longer changes after threshold values makes the output counter-rotating when electric capacity is charged to, and at this moment the working condition of loudspeaker is to send out bass earlier, then transfers high pitch to, up to loosing one's grip.As the time of pressing is very short, then only sends out bass.

Electronic circuit board 15 can be contained in loudspeaker inside, also can be contained in the outside.When being contained in the outside for avoiding lead-in wire too much, 20,23 2 kind of switch can only select a kind ofly, at this moment loudspeaker need 4 lead-in wires altogether: 2 power leads, 2 control lines.Can install whole switches when being contained in the outside, make loudspeaker both can make high and low sound, also can make automatic sound change and interrupted tone or the single usefulness of changing voice.At this moment loudspeaker only need two lead-in wires that connect solenoid 4.

Embodiment

Adopt 324 tetrad integrated packages, utilize wherein the bigeminy assembly to form a multivibrator as king oscillator, oscillation frequency 400HZ.Utilize other bigeminy to form an asymmetrical multivibrator as control generator, its broad pulse is 1 second, and burst pulse is 0.5 second, will send into power transistor with king oscillator output behind its output buck.Loudspeaker are sent out " pouting ... pout ... " when pressing continuously pulsed sound, loudness are 102 and 103 decibels, electric current 1.4A, solenoid parameter 2 * 0.35 enameled wires, 220 circles.

Claims (6)

1, a kind of automatic sound change contactless electronic loudspeaker of forming by dynamic and static iron core [7,1], solenoid [4], diaphragm [8], resonance cover [9], front shroud [13], bonnet [5], support [3] and electronic circuit board [15] etc., it is characterized in that outside solenoid [4], setting up a yoke ring [18], with bonnet [5] driving fit, a control generator [21] is set up in the front of the king oscillator [22] in the control system of being made up of electronic circuit board [15], with king oscillator [22] power controlling transistor [26].

2, according to the automatic sound change contactless electronic loudspeaker of claim (1), it is characterized in that described yoke ring (18) made by pure iron, or make by high permeability high resistivity Ferrite Material, also can build up by silicon steel sheet.

3,, it is characterized in that described control generator (21) control king oscillator (22), again by king oscillator (22) power controlling transistor (26) according to the automatic sound change contactless electronic loudspeaker of claim (1).

4,, it is characterized in that described control generator (21) is with the direct power controlling transistor (26) of king oscillator (22) according to the automatic sound change contactless electronic loudspeaker of claim (1).

5, according to the automatic sound change contactless electronic loudspeaker of claim (1), it is characterized in that described control generator (21) is made up of asymmetrical multivibrator, in the control generator (21), also be to be provided with switch (20) in the feedback circuit of asymmetrical multivibrator.

6,, it is characterized in that described power transistor (26) is made up of single tube or complex pipe according to the automatic sound change contactless electronic loudspeaker of claim (1).

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