CN2420181Y

CN2420181Y - Digital electronic contactless car horn

Info

Publication number: CN2420181Y
Application number: CN 00217529
Authority: CN
Inventors: 马建华
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-08
Filing date: 2000-05-08
Publication date: 2001-02-21
Anticipated expiration: 2010-05-08

Abstract

The utility model relates to a digital electronic automobile horn without contacts, which comprises a horn, a casing body, a sounding device arranged in the casing body, a static iron core, a movable iron core, a winding, an oscillating film positioned on the movable iron core, a steel screen arranged on the oscillating film, an electronic oscillator positioned in the casing body, and a wire holder of the electronic oscillator. The utility model is characterized in that the movable iron core is fixed under the center of the oscillating film; a gap exists between the movable iron core and the static iron core; a bulge is formed at the middle part of the oscillating film; the periphery of the oscillating film is provided with a fold ring; the fold ring contacts a bottom cover of the casing body; the center of the steel screen is provided with a central sound releasing hole for the steel screen; a sound releasing and press collecting ring is formed and extended along the periphery of the central sound releasing hole upwards.

Description

Digital and electronic formula contactless automobile loudspeaker

The utility model relates to a kind of dynamic loud-speaker that is used for automobile, relates in particular to a kind of digital and electronic formula contactless automobile loudspeaker.

At present, prior art automobile electrical loudspeaker are traditional contact electromagnetic type loudspeaker that have.Contact electromagnetic type automobile loudspeaker are arranged usually by vibrating diaphragm, reed, contact, frequency and sensitivity (comprising working current and magnetic air gap) setting device, compositions such as electromagnetic system and shell, horn.Owing to adopt on the structure contact electromagnetic type is arranged, therefore, when loudspeaker are worked, because of required working current big (during operating voltage 12V, electric current approaches about 5A usually), so the electric arc that produces makes it to reduce greatly its service life easily with pitting of contact; During use, because the elasticity modulus that burns the malleable reed of electric arc and the gap (magnetic gap) of contact, make frequency of operation and sound level can not get guaranteeing, performance on the tonequality is unsatisfactory, for this reason, must often adjust its working current, magnetic air gap and polishing erosion point etc., from and make loudspeaker be in the blowing-by state, can not be moistureproof, can not be damp proof and electromagnetic spectrum that electric arc produces is extremely wide, the high frequency radiation that brings therefrom and current supply circuit caused the pollution that is difficult to eliminate, and bring certain interference for the electronic system in the modern automobile.

The purpose of the utility model utility model is to provide a kind of improved digital and electronic formula contactless automobile loudspeaker, it can solve prior art horn trumpet electric arc and the width of cloth and problem such as penetrate, thereby make pure soft, the compact conformation of horn trumpet tonequality, and can be fit to various vehicles.

The purpose of this utility model is achieved in that

A kind of digital and electronic formula contactless automobile loudspeaker comprise: a horn; With the housing that horn links together, this housing is synthetic by top cover and bottom; Be arranged on the sound-producing device in the housing, this sound-producing device comprises: be fixedly installed on the bottom middle part static iron core, be positioned at moving iron core on the static iron core, be linked in the outer coil of static iron core, be positioned at the vibrating diaphragm that is arranged on the moving iron core on the housing bottom, be arranged on the steel screen on the vibrating diaphragm; Be positioned at the electron oscillator of housing; The junction block that housing is outer and captive joint with bottom is set, and be positioned at junction block and with electron oscillator bonded assembly blade tereminal; Be characterized in:

Described moving iron core is fixed on the below at vibrating diaphragm center, is provided with certain clearance between moving iron core and static iron core; The middle part of described vibrating diaphragm forms bump, is provided with ring at the periphery of this vibrating diaphragm, and this ring contacts with housing bottom vibrating diaphragm base; The center of described steel screen is provided with steel screen center sound releasing hole, and extends upward along the periphery of this center sound releasing hole and to form one and release sound collection trim ring.

In above-mentioned digital and electronic formula contactless automobile loudspeaker, wherein, described electron oscillator is made up of mu balanced circuit, frequency generator, charging and discharging circuit and amplifying circuit, and described mu balanced circuit connects to form by dropping resistor R, with zener diode DW; Described frequency generator is that 7555 integrated circuit is formed by model; Described charging and discharging circuit is connected and composed by crystal triode GB1, diode D, resistance R 2 and cond C1; Described amplifying circuit is connected to form by divider resistance R3, R4, fet power pipe IRF and magnet coil L.

In above-mentioned digital and electronic formula contactless automobile loudspeaker, wherein, in the described electron oscillator, be connected to a bypass capacitor C 2, a protection capacitor C 3 in parallel at the magnet coil L place of amplifying circuit at 5 pin places of frequency generator integrated circuit 7555.

In above-mentioned digital and electronic formula contactless automobile loudspeaker, wherein, described steel screen middle part protuberance forms arc, is provided with certain distance between the arc middle part of steel screen and the vibrating diaphragm.

In above-mentioned digital and electronic formula contactless automobile loudspeaker, wherein, on the described bottom with under the steel screen waterproof paper and waterproof paper are being set respectively.

In above-mentioned digital and electronic formula contactless automobile loudspeaker, wherein, described bottom extends to form a flanging downwards along its neighboring, and described steel screen along its neighboring downwards and extend upward and form a packing limit that is coated on outside the flanging.

The utility model digital and electronic formula contactless automobile loudspeaker make it compared with prior art owing to adopted above-mentioned technical scheme, have following advantage and good effect:

1. the utility model is owing to having adopted the electron oscillator that forms based on frequency generator integrated circuit " 7555 ", what thereby contact electromagnetic type loudspeaker will be arranged changes into contact pointless electromagnetic type loudspeaker, thereby solved that produce because of electric arc a series of make that the lost of life of loudspeaker, sound level are unreliable, the performance on the tonequality is unsatisfactory, and brought all drawbacks of certain interference to electronic system.

2. the utility model replaces mechanical contact owing to having adopted with Eltec, what make contact electromagnetic type loudspeaker changes into contact pointless electromagnetic type loudspeaker, thereby the width of cloth that has solved the prior art horn trumpet is penetrated phenomenon, thereby it is pollution-free to electric power system, it is stable to make it reliable operation, frequency sound level, thermal adaptability is good, long service life, can directly replace other all kinds of horn trumpeies.

3. the utility model is owing to adopted the protuberance formation of steel screen middle part arc, make the bottom and the steel screen of loudspeaker form resonator, the center sound releasing hole of steel screen, when the sound film vibrates, form a very high acoustic pressure in the resonator, simultaneously, extend upward along the periphery of this center sound releasing hole and to form one and release sound collection trim ring, thereby make pronunciation directive property good, and efficient height, tonequality are clear and melodious.

4. the utility model is made vibrating diaphragm owing to having adopted with the high-quality elastomeric material, simultaneously, forms bump in the middle of the vibrating diaphragm, has increased the rigidity of sound film thus, has improved the diffusion effect of sound, and the steel that makes it to pronounce is gentle to get both, soft and graceful limpid; And the peripheral upper punch at vibrating diaphragm is torn ring open, and the compliance that improves vibrating diaphragm has thus promptly improved frequency response curve.In

By the description of a following embodiment to the utility model digital and electronic formula contactless automobile loudspeaker, can further understand the purpose of this utility model, specific structural features and advantage in conjunction with its accompanying drawing.Wherein, accompanying drawing is:

Fig. 1 is the structural representation according to the digital and electronic formula contactless automobile loudspeaker that the utility model proposes;

Fig. 2 is the electrical schematic diagram of electron oscillator in the utility model digital and electronic formula contactless automobile loudspeaker.

As shown in Figure 1, the utility model digital and electronic formula contactless automobile loudspeaker comprise: a horn 1 with the housing 2 that horn 1 links together, is arranged on the sound-producing device 3 in the housing 2, be positioned at the electron oscillator 4 of housing 2, and fixedly install housing 2 external connection seats 5.Wherein,

This horn 1 can adopt the horn of various forms and material, and what adopt in the utility model is the automobile horn of general-duty plastic material.

This housing 2 links together with horn 1, and it is united two into one by the bottom 22 that is converx top cover 21 and spill and forms.

This sound-producing device 3 comprises: be fixedly installed on the static iron core 31 at bottom 22 middle parts, be sheathed with a coil 33 outside this static iron core 31; On the moving iron core 2 promptly housing 2 bottoms 22 be provided with a vibrating diaphragm 34, the middle part of this vibrating diaphragm 34 forms bump, below vibrating diaphragm 34 centers, fixedly install a moving iron core 32, should move between iron core 32 and the static iron core 31 and have certain clearance, periphery at vibrating diaphragm 34 is provided with ring 341, this ring 341 contacts with housing 2 bottoms 22, in the utility model, 35 times a

waterproof paper

361 and 362 are set respectively with steel screen on bottom 22, ring 341 just is resisted against on the waterproof paper 361 on the vibrating diaphragm base 23; On vibrating diaphragm 34, be provided with steel screen 35, the periphery of this steel screen 35 is identical closely by waterproof paper 362 and vibrating diaphragm 34, and the middle part protuberance of steel screen 35 forms arc, make steel shield between 35 arc middle parts and the vibrating diaphragm 34 and be provided with certain distance, be provided with steel screen center sound releasing hole 351 at the center of steel screen 35, and, extend upward formation one collection trim ring 352 along this center sound releasing hole periphery; Extend to form a flanging 221 downwards in the neighboring of housing 2 bottoms 22, in the neighboring of steel screen 35 downwards and extend upward and form a packing limit 353 that is coated on closely outside bottom 22 flangings 221, thus, make steel screen 35 and housing 2 bottoms 22 leak-tight joints together.

This junction block 5 is fixedly installed on outside housing 2 bottoms 22, is provided with the blade tereminal 51 that is connected with interior electron oscillator 4 at junction block 5, with this and power connection, provides the working power of electron oscillator 4.

Shown in Fig. 2 (please cooperating referring to Fig. 1 simultaneously), this is the electrical schematic diagram of electron oscillator in the utility model digital and electronic formula contactless automobile loudspeaker.Described electron oscillator 4 is made up of mu balanced circuit, frequency generator, charging and discharging circuit and amplifying circuit; Described mu balanced circuit connects to form by dropping resistor R, with zener diode DW, and it provides whole electron oscillator 4 one stable operating voltage; The core of electron oscillator 4 is frequency generators, and it is that 7555 integrated circuit is formed by model, in the utility model, is connected to a bypass capacitor C 2 at 5 pin places of frequency generator integrated circuit 7555, makes frequency generator work comparatively stable; Charging and discharging circuit is is then connected and composed by crystal triode GB1, diode D, resistance R 2 and cond C1, also has been connected in series a semifixed resistor W in the utility model, to adjust to desirable frequency; Described amplifying circuit is connected to form by divider resistance R3, R4, fet power pipe IRF and magnet coil L; in the utility model; the protection capacitor C 3 in parallel at the magnet coil L place of amplifying circuit; it can absorb the counter potential of moment, with protection fet power pipe IRF not by moment counter potential puncture.

The principle of work of electron oscillator is as follows: oscillating circuit provides stable operating voltage Vc by dropping resistor R, zener diode DW.Crystal triode GB1; diode D; semifixed resistor W; resistance R 2 and capacitor C 1 constitute charging and discharging circuit; C1 resistance R 1 when charging provides bias voltage for crystal triode BG1; make the abundant conducting of crystal triode BG1; electric current is through GB1; semifixed resistor W; R2 charges to C1; when capacitor C 1 voltage reach power line voltage VC 2/3rds the time; frequency generator is that model is " 3 " pin output low level of 7555 integrated circuit; " 7555 " internal discharge pipe conducting simultaneously; capacitor C 1 is passed through R2; semifixed resistor W; diode D; " 7 " pin discharge of integrated circuit; when capacitor C 1 terminal voltage is reduced to three of VC/for the moment; frequency generator is that model is the existing high level of " 3 " pin output of 7555 integrated circuit; this moment, the IC interior discharge bulb was by (new round discharges and recharges beginning); frequency can be set according to the required frequency of sound matrix; formula is f=0.722/ (w+R2) C; this circuit is the square wave oscillation ripple of width symmetry; its dutycycle is 50%; the square-wave signal of integrated circuit " 7555 " output is directly coupled to the not utmost point after R3 and R4 dividing potential drop; fet power pipe IRF by good temp characteristic serves as amplifying circuit; drive magnet coil; produce alternating magnetic field; drive the vibration of sound film; because power-amplifier stage is operated under the open and-shut mode; and make the coil in the loudspeaker will produce self-induced emf; form reverse pointed pulse; capacitor C 3 plays protection IRF power tube in the circuit; capacitor C 3 is when absorbing reverse pointed pulse; inductance L is compensated, increase work efficiency.

The utility model is to make like this: vibrating diaphragm 34 is made with the high-quality elastomeric material, it is straight through setting separately according to different automobile types is required for φ, for satisfying the needs on the frequency, vibrating diaphragm 34 will adapt on the selection of material and thickness therewith, for the compliance that improves vibrating diaphragm 34 is a frequency response curve, vibrating diaphragm 34 is carried out special process to be handled, wherein tear ring 341 open in the peripheral upper punch of vibrating diaphragm 34, and at the centre of vibrating diaphragm 34 formation bump, made it to increase the rigidity of sound film, and its sound has reached the effect of diffusion, not only makes gentle the getting both of steel of pronunciation, and soft and graceful limpid.Iron core is that the soft iron that permeability is big and magnetic hysteresis loss is little is made, and divides static iron core 31 on the structure, and moving iron core 32 two parts form same rotational symmetry.The static iron core 31 that is arranged in coil 33 is fixedly installed on bottom 22 middle parts, and moving iron core 32 is fixedly installed on the below at vibrating diaphragm 34 centers, leaves air gap between the quiet moving

iron core

31 and 32, satisfies the stroke of moving iron core 32.During loudspeaker 1 work, when the high level pulse electric current passed through coil 33, static iron core 31 produced magneto motive forces, and moving iron core 32 just drives vibrating diaphragm 34 and moves to static iron core 31 directions fast, when frequency generator is that model is when being 7555 integrated circuit output low voltage, power tube IRF ends, no current in the coil 33, and magneto motive force rapidly disappears, vibrating diaphragm 34 drives moving iron core 32 and resets fast, so, go round and begin again, form acoustic mechanism.For the sound film, there is intrinsic amplitude versus frequency characte in it, and moving iron core 32 directly loads on the vibrating diaphragm 34, its quality size has the adjusting shock damping action, in other words plays negative feedback, it can extend the frequency response of vibrating diaphragm 34, absorbed moving shaking and disturbed, and, vibrating diaphragm 34 was operated in the range of linearity owing to utilized the shock damping action of moving iron core 32.And bottom 22 is formed resonator with steel screen 35, and the center sound releasing hole 351 of steel screen 35 when vibrating diaphragm 34 vibrations, forms a very high acoustic pressure in the resonator, and its characteristics are the efficient height, tonequality is clear and melodious, directive property good.

In sum, the utility model digital and electronic formula contactless automobile loudspeaker are owing to replace mechanical contact with Eltec, what make contact electromagnetic type loudspeaker changes into contact pointless electromagnetic type loudspeaker, fundamentally solve the drawback of orthodox car electromagnetic type loudspeaker thus, its no electric arc, the no width of cloth is penetrated, pollution-free to electric power system, reliable operation, the frequency sound level is stable, thermal adaptability is good, long service life, and in the loudspeaker life span, must adjust (can have parameter all when dispatching from the factory, once to set up), and tonequality is pure soft, acoustic pressure is big, power consumption is little, the efficient height, compact conformation, be fit to various vehicles, can directly replace other all kinds of loudspeaker.

Claims

1. digital and electronic formula contactless automobile loudspeaker comprise:

One horn (1); With the housing (2) that horn (1) links together, this housing (2) is synthetic by top cover (21) and bottom (22); Be arranged on the sound-producing device (3) in the housing (2), this sound-producing device (3) comprising: be fixedly installed on bottom (22) middle part static iron core (31), be positioned at moving iron core (32) on the static iron core (31), be linked in the outer coil (33) of static iron core (31), be positioned at the vibrating diaphragm (34) that is arranged on the moving iron core (2) on housing (2) bottom (22), be arranged on the steel screen (35) on the vibrating diaphragm (34); Be positioned at the electron oscillator (4) of housing (2); The junction block (5) that housing (2) is outer and captive joint with bottom (22) is set, and be positioned at junction block (5) and with electron oscillator (4) bonded assembly blade tereminal (51);

It is characterized in that:

Described moving iron core (32) is fixed on the below at vibrating diaphragm (34) center, is provided with certain clearance between moving iron core (32) and static iron core (31);

The middle part of described vibrating diaphragm (34) forms bump, is provided with ring (341) at the periphery of this vibrating diaphragm (34), and this ring (341) contacts with housing (2) bottom (22);

The center of described steel screen (35) is provided with steel screen center sound releasing hole (351), and extends upward along the periphery of this center sound releasing hole (351) and to form one and release sound collection trim ring (352).

2. digital and electronic formula contactless automobile loudspeaker as claimed in claim 1, it is characterized in that: described electron oscillator (4) is made up of mu balanced circuit, frequency generator, charging and discharging circuit and amplifying circuit, and described mu balanced circuit connects to form by dropping resistor R, with zener diode DW; Described frequency generator is that 7555 integrated circuit is formed by model; Described charging and discharging circuit is connected and composed by crystal triode GB1, diode D, resistance R 2 and cond C1; Described amplifying circuit is connected to form by divider resistance R3, R4, fet power pipe IRF and magnet coil L.

3. digital and electronic formula contactless automobile loudspeaker as claimed in claim 1; it is characterized in that: in the described electron oscillator (4); 5 pin places in frequency generator integrated circuit 7555 are connected to a bypass capacitor C 2, the protection capacitor C 3 in parallel at the magnet coil L place of amplifying circuit.

4. digital and electronic formula contactless automobile loudspeaker as claimed in claim 1 is characterized in that: described steel screen (35) middle part protuberance forms arc, is provided with certain distance between the arc middle part of steel screen (35) and the vibrating diaphragm (34).

5. digital and electronic formula contactless automobile loudspeaker as claimed in claim 1 is characterized in that: a waterproof paper (361) and waterproof paper (362) are set respectively on described bottom (22) and under the steel screen (35).

6. digital and electronic formula contactless automobile loudspeaker as claimed in claim 1, it is characterized in that: described bottom (22) extends to form a flanging (221) downwards along its neighboring, and described steel screen (35) along its neighboring downwards and extend upward and form a packing limit (353) that is coated on outside the flanging (221).