CN2792070Y

CN2792070Y - High pitch loudspeaker with multiway diffusion function

Info

Publication number: CN2792070Y
Application number: CN 200520058503
Authority: CN
Inventors: 王富裕
Original assignee: DONGYUAN ELECTRONIC Co Ltd SHENZHEN
Current assignee: DONGYUAN ELECTRONIC Co Ltd SHENZHEN
Priority date: 2005-05-14
Filing date: 2005-05-14
Publication date: 2006-06-28
Anticipated expiration: 2015-05-14

Abstract

The utility model discloses a high pitch loudspeaker with multi-way diffusion function, which comprises a vocalization unit which converts an input high-frequency signal into an audio signal, wherein the front end of a vibrating diaphragm of the vocalization unit is also provided with a sound wave diffuser which comprises a plurality of phase plugs and cross grid plates, the phase plugs form a radial shape and the adjacent phase plugs are separated in different individual areas by the cross grid plate. After the utility model is adopted, each phase plug respectively becomes an independent sound source and the sound sources are in different directions and has tiny interference. All the orientation of the front end of the high pitch loudspeaker can receive the sound with consistent sound pressure level. The utility model has the advantages of wide sound source directionality, uniform sound field distribution and extensive high pitch coverage area.

Description

High pitch loudspeaker with multidirectional diffusion function

Technical field

The utility model relates to a kind of loud speaker, relates in particular to a kind of high pitch loudspeaker.

Background technology

The vibrating diaphragm of existing high pitch loudspeaker can be regarded the result of the some cell area addition integrations in the vibrating diaphragm as to the contribution of space sound field, because each cell area arrives the distance and the direction of space point and all there are differences, this just forms the directive property characteristic of loud speaker, the different directions that promptly departs from the speaker center reference axis has different sound pressure sensitivities, it is big more to depart from this central shaft angle, and pressure response sensitivity is low more; And this directive property and sound frequency are also closely related, and frequency is high more, and off-axis is when equal angular, and pressure response sensitivity is low more, and just directive property is strong more.So the directive property broad of woofer,, promptly off-axis to the time, acoustic pressure decay is less, high pitch loudspeaker then directive property is narrower, promptly off-axis to the time decay big, concrete variation can be referring to Fig. 1 and Fig. 2.Fig. 1 is the formation schematic diagram of the angle theta of the central axis of high pitch loudspeaker and off-axis, and wherein, setting off-axis is θ with respect to the angle of central reference axis.Fig. 2 is the directive property frequency response curve schematic diagram of existing loud speaker, upper, middle and lower three variations line is represented θ=0 degree, θ=30 degree, the frequency response curve when θ=60 are spent respectively among the figure, as seen, the high frequency attenuation of θ=30 degree is bigger, and the high frequency attenuation of θ=60 degree is bigger.When the directive property broad of sound system, sound field is evenly distributed, and coverage is big, and Sensurround (presence) is good; Then opposite when directive property is narrower, therefore, when there is a lot of audience at the audition scene, the particular importance but the coverage of high pitch loudspeaker just seems, the acoustics of the high pitch loudspeaker that directive property is too narrow will be very poor.

Produce above-mentioned phenomenon reason we can understand by " duality principle " principle of sonic propagation: because frequency of sound wave that high pitch loudspeaker sent is higher, sound wave has more " corpuscular property ", when propagating, more approach linearly to propagate along the central axis of the diaphragm of loudspeaker, the amplitude that is difficult for diffraction or diffraction is less, thereby in that to deviate from the sound pressure that can receive on this central axial direction then lower, frequency is high more, deviation angle is big more, and the aforementioned sound pressure that can receive then decays soon more, obvious more.For this reason, the vibrating diaphragm of common high pitch loudspeaker all is designed to spherical or ellipsoid is crown, so that the distribution of the sound field around the vibrating diaphragm is more even, nonetheless, the narrower defective of the directive property of above-mentioned high pitch loudspeaker has still been failed thorough change, reason be the vibrating diaphragm of this structure still exist one from the center to the limit central axis, receivable sound is the strongest on this direction, and in the zone of departing from this direction owing to the phase difference of sound source or the reasons such as synthetic angle increasing of motion, offseting phenomenon in various degree can appear in receivable intensity of sound, causes on these directions, still exists certain acoustic pressure poor, and deviation angle is big more, and correspondingly the acoustic pressure difference is also big more.In fact, at present higher and need the occasion of broad directive property at frequency of source, basically all adopt and at the sound source place a plurality of high pitch loudspeakers are set and work simultaneously, the central axis direction of each high pitch loudspeaker is different separately, the service zones of different is to improve high pitch sound field uniformity that distributes and the coverage that enlarges high pitch.

But this to utilize the defective of the technical scheme that a plurality of high pitch loudspeakers work simultaneously also be apparent in view: complex structure, not compact; Install inconvenient; Cost is higher.

Summary of the invention

For overcoming the defective of above-mentioned prior art, technical problem to be solved in the utility model is intended to provide a kind of high pitch loudspeaker that can on a plurality of directions sound source can relatively evenly be spread.

For solving the problems of the technologies described above, the utility model proposes a kind of high pitch loudspeaker with multidirectional diffusion function, comprise the pronunciation unit that the high-frequency signal of input is converted to sound signal by lead, vibrating diaphragm front end in described pronunciation unit also is provided with the sound wave diffuser, and described sound wave diffuser comprises a plurality of phase plugs that radially distribute and is used for adjacent described each phase plug is separated in the intersection screen of different isolated areas.

Further, the bottom of the bottom of described each phase plug and described intersection screen can be interconnected by intercell connector and one-body molded, cover the front end of the vibrating diaphragm of described pronunciation unit by the merging that matches of the bottom of described each phase plug, the vibrating diaphragm shape of bottom surface and described pronunciation unit of the bottom of screen and the sound wave diffuser that each intercell connector constitutes jointly of intersecting.

That the shape of described each phase plug is preferably is spherical, ellipsoid is crown or bullet-headed.

On the aforementioned structure basis, described each phase plug can more specifically be divided into the top phase plug and, the side phase plug that a plurality of and described top phase plug shape is identical, be uniformly distributed in the top periphery, described intersection screen also correspondingly is distributed in the centre position of described each adjacent phase plug.

After adopting said structure, be positioned at different isolated areas and the phase plug that radially distributes owing to being provided with at the vibrating diaphragm front end, make each phase plug become separately one independently, different point to, the very little sound source that influences each other, like this, on a plurality of orientation of high pitch loudspeaker front end, all can receive sound pressure sound unanimous on the whole, that is to say, high pitch loudspeaker as one on the whole, the directive property of sound source is wideer, being more evenly distributed of sound field, the coverage of high pitch is wider.

To and be elaborated to the utility model in conjunction with the accompanying drawings by embodiment below.

Description of drawings

Fig. 1 is the formation schematic diagram of the angle theta of the central axis of high pitch loudspeaker and off-axis;

Fig. 2 is the directive property frequency response curve schematic diagram of existing loud speaker;

Fig. 3 is the structural representation of the sound wave diffuser in the high pitch loudspeaker described in the utility model;

Fig. 4 is the plan structure schematic diagram of sound wave diffuser shown in Figure 3

Fig. 5 is the cross-sectional view of high pitch loudspeaker described in the utility model.

Embodiment

With reference to accompanying drawing 3, Fig. 4 and Fig. 5, in a kind of embodiment of the present utility model, high pitch loudspeaker specifically comprises the pronunciation unit 1 that the high-frequency signal of input is converted to sound signal by lead 11, vibrating diaphragm 12 in pronunciation unit 1 is generally spherical crown, ellipsoid hat etc. is beneficial to the shape of sound source piston vibration sounding and diffusion propagation, at vibrating diaphragm 12 front ends, also be provided with sound wave diffuser 2 especially, this sound wave diffuser 2 mainly comprises a plurality of phase plugs that radially distribute and is used for adjacent described each phase plug is separated in the intersection screen of different isolated areas, so that becoming, disperses each phase plug, the high pitch sound source that radiation direction is different separately, obviously, the concrete quantity of intersection screen will be determined according to the quantity of phase plug, as long as can make each phase plug be positioned at an independently emitting area.

Generally speaking, phase plug adopts as far as possible that diffuse sound may efficient is higher, the loss materials with smaller is made, in order to make that to become each phase plug of new sound source better to the dispersing of sound, radiation effect, the shape of each phase plug preferably also is spherical or ellipsoid is crown or bullet-headed, with the higher sound of full and uniform ground frequencies of propagation in wider zone.

Usually, the sound wave diffuser 2 that is made of each phase plug, the screen that intersects can directly be fixed on the support 13 of the vibrating diaphragm 12 that is used for fixing in the pronunciation unit 1 and be arranged at the front end of this vibrating diaphragm, in fact this is not to be unique connection mode, for some specific high pitch loudspeaker, can sound wave diffuser 2 be fixed on the front end of vibrating diaphragm 12 in indirect mode fully, as long as make the bottom surface of sound wave diffuser 2 can press close to the sound source that also can successfully receive vibrating diaphragm 12 at the front end of vibrating diaphragm 12.

In order to reduce the cost that designs and produces and assemble, the bottom 220 of each phase plug 22 and the bottom 250 of intersection screen 23 can be connected together by intercell connector 24, and make each phase plug, each intersects screen and injection moulding of intercell connector one or die cast, at this moment, bottom by each phase plug, intersecting the bottom surface of the bottom of screen and the common sound wave diffuser 2 that constitutes of each intercell connector preferably matches with vibrating diaphragm 12 shapes of pronunciation unit 1 as far as possible and merges the front end that covers this vibrating diaphragm, such as: as shown in Figure 5, if the surface configuration of vibrating diaphragm 12 is spherical, then by the bottom of each phase plug, intersecting the bottom surface of the bottom of screen and the sound wave diffuser 2 that each intercell connector forms naturally also is designed to bigger spherical of radius, can cover the surface of vibrating diaphragm 12 just, make when structure of the present utility model is quite compact, can also be coupled as far as possible expeditiously, transmission is from the sound source energy of vibrating diaphragm 12.

It is more even for sound field is distributed, on the aforementioned structure basis, each phase plug can more specifically be distributed as make the more uniform top of sound field phase plug and, the side phase plug that a plurality of and described top phase plug shape is identical, be uniformly distributed in the top periphery, each intersection screen also correspondingly is distributed in the centre position of each adjacent phase plug, to avoid the forming different sound field effect of directive property artificially.

Claims

1. high pitch loudspeaker with multidirectional diffusion function, comprise the pronunciation unit that the high-frequency signal of input is converted to sound signal by lead, it is characterized in that: the vibrating diaphragm front end in described pronunciation unit also is provided with the sound wave diffuser, and described sound wave diffuser comprises a plurality of phase plugs that radially distribute and is used for adjacent described each phase plug is separated in the intersection screen of different isolated areas.

2. the high pitch loudspeaker with multidirectional diffusion function as claimed in claim 1, it is characterized in that: the bottom of the bottom of described each phase plug and described intersection screen interconnects and one-body molded by intercell connector, by the bottom of described each phase plug, the vibrating diaphragm shape of bottom surface and described pronunciation unit of the bottom of screen and the sound wave diffuser that each intercell connector constitutes jointly of intersecting match merging cover described pronunciation unit the front end of vibrating diaphragm.

3. the high pitch loudspeaker with multidirectional diffusion function as claimed in claim 1 or 2 is characterized in that: being shaped as of described each phase plug is spherical, ellipsoid is crown or bullet-headed.

4. the high pitch loudspeaker with multidirectional diffusion function as claimed in claim 3, it is characterized in that: described each phase plug comprise the top phase plug and, the side phase plug that a plurality of and described top phase plug shape is identical, be uniformly distributed in the top periphery, described intersection screen also correspondingly is distributed in the centre position of described each adjacent phase plug.