CN201150124Y

CN201150124Y - Helical acoustic channel loudspeaker

Info

Publication number: CN201150124Y
Application number: CNU2008200306375U
Authority: CN
Inventors: 陈权江
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-01-11
Filing date: 2008-01-11
Publication date: 2008-11-12
Anticipated expiration: 2018-01-11

Abstract

The utility model relates to a loudspeaker, in particular to a spiral-shaped sound channel loudspeaker. The spiral-shaped sound channel loudspeaker comprises a sound producing unit and an acoustic horn, which is characterized in that the acoustic horn is arranged in the way that the tail part of the sound channel presents an open-linear shape, and the sound producing part of the sound producing unit is arranged in the base circle of the involute sound channel. The above structure can apply the involute principle to design the sound channel, when the sound is closed by the involute sound channel, the normal line part at any position can be tangent with the base circle, thus when the sound is passed by the sound channel, the resistance can be reduced to be the minimum. The power outputted by the sound can be greatly enhanced, the depreciation of the sound can be reduced, the spiral-shaped sound channel can greatly shorten the total length of the appearance of the acoustic horn, and the influence of the ambient operating force (such as the gale and the rainstorm etc) to the loudspeaker can be obviously weakened, because the loudspeaker can be directly made through a mold, the processing difficulty can be reduced, and the cost can also be debased.

Description

The helical form channel loudspeaker

Technical field

The utility model relates to a kind of loud speaker, especially a kind of helical form channel loudspeaker.

Background technology

At steamer, train, people's air defence, harbour, the mine, large-scale square, the grassland, places such as oil field generally all will be provided with a loud speaker and diffuse information, loud speaker is particularly important to boats and ships and people's air defence place, boats and ships at sea, the safe navigation in inland river is vital, the IMO of International Maritime Organization (International Marine Organization) has formulated a series of pact, rule, resolution, circular and proposal, wherein relate to the main rule of sound, pact has Rules of Navigation (Colreg), regulation will have very high sound pressure level, in the hope of being arranged, enough signals remind the other side, avoid collision, also stipulated much to represent the various meaning, and the people's air defence place is higher with the sound pressure level requirement of loud speaker by the voice signal of whistling length combination.

Employed loud speaker is generally horn-type in boats and ships and the people's air defence place at present, horn is long tube trumpet type, to reach certain sound pressure level like this and just need bigger power, traditional loudspeaker horn is longer, and because the reason of shape, reaching certain sound pressure level needs acoustical generator that very big power is arranged, and because horn is long, ratio is convenient when installing, outer its active force of bound pair is (as strong wind when especially being installed on the boats and ships, storms etc.) influence to it is very big, requires than higher for the process equipment of this loud speaker.

Summary of the invention

The purpose of this utility model is, a kind of horn weak point, consumed power helical form channel loudspeaker little, easy to process are provided.

The utility model is realized by following scheme: a kind of helical form channel loudspeaker, comprise pronunciation unit and horn, it is characterized in that: sound channel is made of tubaeform sound channel of front end and afterbody involute shape sound channel in the described horn, described afterbody involute shape sound channel cross section is circular, and the audible segment of pronunciation unit is arranged in the basic circle of afterbody involute sound channel.

Of the present utility modelly further be set to: described horn is made of horn-like front end and afterbody disc-shaped body, described loud speaker also comprises two hemispheres female cap body, the hemisphere lid is fixedly installed on the both sides of disc-shaped body respectively, the pronunciation unit is arranged in one of them hemisphere lid, and the disc-shaped body internal shaping has the involute of being shape pipeline to constitute the involute sound channel.

This is provided with the shape of the sound channel afterbody being arranged to involute, and an audible segment of pronunciation unit is arranged in the basic circle, when sound passes through the involute sound channel, the normal of any position is all tangent with basic circle, resistance when sound is through sound channel like this just is reduced to minimum, improve the power of voice output greatly, reduced the loss of power.The outward appearance total length of horn has been shortened in simultaneously such setting greatly, external world's (as strong wind, storm etc.) obviously weakens its active force when using like this, especially be applied on the boats and ships, effect is obvious especially, and the structure of employing disc body and hemisphere lid, in processing and fabricating, just can adopt the mould straight forming like this, reduce the difficulty of processing, reduce cost of manufacture.

Below in conjunction with the accompanying drawings and the specific embodiments the utility model is further described.

Description of drawings

Fig. 1 is the stereogram of embodiment;

Fig. 2 is the structural representation one of present embodiment;

Fig. 3 is the structural representation two of present embodiment;

Embodiment

With reference to figure 1, Fig. 2, Fig. 3 as can be known, a kind of helical form channel loudspeaker, comprise pronunciation unit 1 and horn, described horn afterbody sound channel is the involute shape setting, the sound channel cross section is circular, the audible segment of pronunciation unit 1 is arranged in the basic circle of involute sound channel, horn front end 4 is tubaeform, horn afterbody 5 is made of disc-shaped body 2 and hemisphere lid 3, hemisphere lid 3 is fixedly installed on the both sides of disc-shaped body 2 respectively, pronunciation unit 1 is arranged in one of them hemisphere lid 3, disc-shaped body 2 is a half slide structure, promptly involute by two slit bamboo or chopped woods, its facing surfaces of two slit bamboo or chopped woods is provided with outline line and is the semi arch groove formation afterbody involute shape sound channel 21 that involute distributes, another one hemisphere lid 3 is fixed on a side of disc body 2, and horn front end 4 is pegged graft with the afterbody involute shape sound channel 21 in the disc-shaped body 2.

Pronunciation of the present utility model unit 1 is behind sounding, sound blazes abroad by the involute sound channel of horn, because when sound passes through the involute sound channel, the normal of any position is all tangent with basic circle, resistance when sound is through sound channel like this just is reduced to minimum, improve the power of voice output greatly, reduced the loss of power.

The outward appearance of the horn afterbody in the utility model can have a variety of selections, as long as guarantee that inner sound channel is just passable with the involute shape setting, and the length of outward appearance can not be grown, as square, rhombus etc., and present embodiment is to adopt sphere, this is because the outward appearance total length of horn has been shortened in setting like this greatly, extraneous active force (as strong wind, storm etc.) just obviously weakens its influence, and owing to the utility model as long as by a mould, directly can make, therefore reduce the difficulty of processing, reduced cost.

The utility model can be applied in the place that steamer, train, people's air defence, harbour, mine, large-scale square, grassland, oil field etc. need high-power playback.

Claims

1. helical form channel loudspeaker, comprise pronunciation unit and horn, it is characterized in that: sound channel is made of tubaeform sound channel of front end and afterbody involute shape sound channel in the described horn, described afterbody involute shape sound channel cross section is circular, and the audible segment of pronunciation unit is arranged in the basic circle of afterbody involute sound channel.

2. according to the described helical form channel loudspeaker of claim 1, it is characterized in that: described horn is made of horn-like front end and afterbody disc-shaped body, described loud speaker also comprises two hemispheres female cap body, the hemisphere lid is fixedly installed on the both sides of disc-shaped body respectively, the pronunciation unit is arranged in one of them hemisphere lid, and the disc-shaped body internal shaping has the involute of being shape pipeline to constitute the involute sound channel.