CN1254151C - Pointsound-source spiral-casing sound box and its making method thereof - Google Patents
Pointsound-source spiral-casing sound box and its making method thereof Download PDFInfo
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- CN1254151C CN1254151C CN 03103087 CN03103087A CN1254151C CN 1254151 C CN1254151 C CN 1254151C CN 03103087 CN03103087 CN 03103087 CN 03103087 A CN03103087 A CN 03103087A CN 1254151 C CN1254151 C CN 1254151C
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Abstract
The present invention relates to a point sound source volute sound box and a manufacturing method thereof. The present invention solves the problem that the tone quality effect of the existing surface sound source sound box is not ideal, provides a point sound source volute sound box with the advantages of reasonable structure of a box body and high property of a loudspeaker, and also provides a manufacturing method with the advantage of accurate and convenient manufacture. The sound box of the present invention is composed of a spiral cavity and a loudspeaker, wherein the extended length of the cavity is from 500 to 5000mm, and the dimension of a silencing outlet of the cavity is from 20 to 70mm; the dimension of an installing opening of the loudspeaker is the same as the dimension of the installed loudspeaker, the dimension of a spiral gap is from 3 to 40mm, the installing opening of the loudspeaker is provided with a section of compensating volume, and the loudspeaker is arranged in the compensating volume. The sound box of the present invention has the manufacturing method: 1, a primary box body curve diagram and a compression primary box body curve diagram of a base circle evolvent are made, a semi-product box body curve diagram is made, and a compensating sound box cavity is made; 2, a finished product box body is manufactured according to a finished product box body curved diagram. The method has steps of the manufacture of a framework of the box body, the casting of the box body, the surface painting of the box body, and the installation and the debugging of a base of the box body and a loudspeaker unit.
Description
(1) technical field:
The present invention relates to a kind of point sound source spiral case audio amplifier and preparation method thereof.
(2) background technology:
Conventional audio amplifier all belongs to the area source of sound audio amplifier, and more or less there is following some inadequate natural endowment in they:
(1) there is the sound waves cross-infection in the panel of casing.
(2) the deadweight deficiency of casing.
(3) there is the sound waves cross-infection in the box house wallboard.
(4) body structure design itself has restricted giving full play to of speaker performance.
Above-mentioned four point defects make the tamber effect of audio amplifier not reach the performance requirement of loud speaker.
(3) summary of the invention:
The invention solves the existing unfavorable defective of area source of sound audio amplifier tamber effect, provide a kind of body structure reasonable, make that the performance of loud speaker is given full play to, and cost of manufacture is cheap, point sound source spiral case audio amplifier handsome in appearance, and provide a kind of energy accurate, convenient manufacture method of making.
The technical scheme of sound box structure of the present invention is as follows: it is to be made of spiral helicine cavity and loud speaker, the spread length 500mm-5000mm of cavity, the size 20-70mm of noise reduction outlet, the size of loud speaker installing port is measure-alike with the loud speaker of being installed, gap between screw 3--40mm, be provided with one section in the installing port end of loud speaker and remedy volume, in remedying volume, be provided with loud speaker.
The manufacture method of sound box of the present invention is as follows:
The cavity of casing is designed for the medium and low spectrum loudspeaker unit, the overall dimension of bass unit and recommend the casing net volume during the design of point sound source spiral case audio amplifier is mainly considered, the requirement during according to the box house special construction and the demoulding and determining.According to the installation place diameter dimension of selected loud speaker, determine that this audio amplifier installs the size of speaker port, determine the net volume and the noise reduction outlet diameter size of casing according to needed acoustics, the casing spread length obtains following formula:
Li＝Li
Di＝(Di-D*)×Li+1/Li+D*
Vi＝π×(Di+D*)×Li×10-6
Ln＝π×Di
Illustrate: the cavity circular diameter on the Di-circle directrix, the D*-noise reduction exports initial circular diameter, circumference on the Ln-circle directrix, initial circle on the preliminary curve cavity of the Li-directrix and the distance between the current circle constitute the volume of curve cavity between initial circle of Vi-and the current circle.Wherein, long measure is mm, and volume unit is L.
Concrete manufacture method is as follows:
1, mapping:
(1) preliminary casing curve chart: selected basic circle is made involute, and base circle diameter (BCD) is to determine according to size, the installation dimension of selected loud speaker and the development length of the diameter of the audio amplifier net volume of recommendation, selected iron wire or other wire rods, concrete thickness and casing thereof of audio amplifier noise reduction outlet.On involute uniformly-spaced to make the centre point of each cavity circle successively, the needs of neglecting manufacture craft greatly, esthetic requirement and demands of individuals at interval and deciding, cross the cavity circle centre point and the basic circle center of circle and make ray, obtain the directrix of each cavity circle, determine each cavity diameter of a circle Di according to above-mentioned formula, each cavity circle is connected the preliminary casing curve chart that constitutes thus according to the involute work.
(2) semi-finished product casing curve chart: four end points up and down by each cavity circle connect respectively, obtain lineback, linea ventralis and left and right side line on the preliminary curve cavity.Because the gap between screw of preliminary curve cavity is bigger, volume is little in order to obtain, the casing of compact conformation, with each cavity circle on the preliminary casing curve along directrix to the translation of the basic circle center of circle (regarding involute as receives in basic circle), each cavity circle after the translation is reconnected, gap between screw is equal to, or greater than be used to the twice of the diameter of making audio amplifier skeleton wire rod, so just obtains semi-finished product casing curve chart.
(3) remedy the audio amplifier cavity: because involute is to the interior receipts of basic circle, make the volume of the volume of semi-finished product curve casing less than preliminary curve casing, the volume of the preliminary curve casing that equals to set for the volume that guarantees the finished product casing is provided with in the port of the audio amplifier curve that loud speaker is installed and remedies the audio amplifier cavity.Finally obtain complete finished product casing curve chart.
2, the concrete making:, make the finished product casing according to above-mentioned complete finished product casing curve chart.
(1) box frame is made:
Making cavity circle:, make the back of the body, abdomen, left and right side line and series circle according to above-mentioned cavity diameter of a circle dimension D i and the back of the body, abdomen, the blanking of left and right side line Ln parameter; Greatest circle and smallest circle are fixed in the two ends of the back of the body, abdomen, left and right side line inboard; According to drawing each is justified the corresponding position that is fixed in order in the back of the body, abdomen, the left and right side line again, form the casing basic framework.After welding basic framework,, make an iron hoop the same, the needs that the thickness of ring enough is threaded with the installation position according to the installation position size of selected loud speaker.The relevant position is drilled with through hole on ring, is used to install loud speaker; After installing ring was carried out, with the round tip-off of maximum, installing ring in the replacement made box frame.
(2) casing casting:
The distributed filled internal mold of in the skeleton cavity, packing into; Loud speaker is installed port seal with loess, use rapid condensation cement then, cast at twice by two halves up and down, after cement is solid, take out loess and internal mold, the screw of installing ring is with sealing with wax, and with the immersion of whole box body submerged, casing is further strong.
(3) casing lacquer painting:
Putty on tank surface makes casing circularity and smoothness can meet designing requirement, japanning light face behind the upward intact putty.
(4) cabinet base:
Because the designed tank floor out-of-shape and the modeling requirement of casing itself are provided with corresponding base in the bottom of casing.
The advantage of sound box of the present invention is as follows:
1, the casing external form is the helical type of gradually closing, finish coat varnish on the shell, and numberization sound to greatest extent weakens the intensity of injurious sound, and the sound of desalination loud speaker periphery and noise reduction outlet is at the sound field inconsistent phenomenon in audio amplifier front.
2, the weight of casing self is enough, and its material is a concrete, and is more firm at homotype loud speaker and volume lower box, need not to add other materials to gain in weight.
3, cabinet wall is indenting state, sound by the time produce natural scattering, the intensity of cutting down noise reduction exit sound to greatest extent, noise reduction part is unified whole with shell, has avoided the different frequency responses performances of different materials in same acoustic field.
4, the optimal design of body structure makes the performance of loud speaker be not fully exerted.
5, manufacture craft is simple, with low cost, and is durable, handsome in appearance.
(4) description of drawings:
Fig. 1 is preliminary casing curve chart.Fig. 2 is a semi-finished product casing curve chart.
(5) embodiment:
1, inventive principle and characteristics
(1) Principles of Acoustics:
Novel audio amplifier is a point sound source spiral case audio amplifier, the two sides of separating loud speaker by casing, intensity of sound with the inner special construction reduction back side, angle with the noise reduction outlet changes its phase place, the area of loud speaker front panel only is the size of loud speaker itself simultaneously, the finish coat varnish of tank surface also can participate in the reduction process with turning bane into boon, thereby loud speaker can show its performance better and needn't be limited by casing.
(2) cabinet design:
The cavity of casing be for the medium and low spectrum loudspeaker unit designed, the high pitch loudspeaker unit can be without cavity, and voice unit and casing are discrete, thereby the design of point sound source spiral case audio amplifier mainly consider in bass unit overall dimension and recommend the casing net volume, the requirement of the size of audio amplifier noise reduction outlet during according to the size of box inner structure and the demoulding determined.According to the mounting groove diameter dimension of selected loud speaker, determine net volume, noise reduction outlet diameter size and the casing spread length of casing to obtain following table according to needed acoustics:
Li Li
Di (Di-D*)×Li+1/Li+D*
Vi ∏×(Di+D*)×Li×10-6
Ln π×Di
Illustrate: the cavity circular diameter on the Di-circle directrix, the D*--noise reduction exports initial circular diameter, circumference on the Ln-circle directrix, initial circle on the preliminary curve cavity circle of the Li-directrix and the distance between the current circle constitute the volume of curve cavity between initial circle of Vi-and the current circle.Wherein, long measure is mm, and volume unit is L.
According to last table gained data mapping.Select for use the basic circle of deciding diameter to make involute, base circle diameter (BCD) is mainly considered the factors such as the concrete thickness of diameter and casting back of selected iron wire or other wire rods.
1. as shown in Figure 1, the circle of aforementioned selected diameter is made involute for basic circle, and amount is made each round centre point successively at certain intervals, crosses the center of circle and makes the directrix that the line of each point obtains each circle, serial number successively.Mapping obtains the preliminary casing curve chart according to the involute work.
2. because the requirement of actual welding technology, each cavity circle is in the inboard of the curve cavity back of the body, abdomen, left and right side line, and the gap between screw of curve cavity will be considered the size of selected iron wire or other gauge or diameter of wires, welded gaps, follow-uply greasy giving and the gap of japanning etc., obtain rational gap between screw.As shown in Figure 2, with this gap between screw be as the criterion the mapping obtain new curve cavity, retouch out its profile with thick line, with dashed lines is made the center line of new curve cavity again, has so just obtained the back of the body, abdomen, the left and right side line of semi-finished product casing curve chart and cavity thereof.In order to remedy the minimizing of the dischargeable capacity that produces because of new and old casing curve cavity adjustment, and the installation site that makes loud speaker is on the cavity circle tangent line, the harmony that keeps casing integral body, set up the rectangular coordinate system in the basic circle center of circle according to the casing curve of gained, mapping obtains adjusting round directrix, adjusting diameter of a circle is the maximum installation diameter dimension of selected loud speaker, finally obtains complete finished product casing curve chart.The installation place with dashed lines of curve cavity loud speaker is made the overall dimensions figure of selected loud speaker in the drawings, and is more directly perceived like this.
2, casing is made:
(1) making of box frame:
Make material with selected iron wire or other wire rods, select appropriate electrical welding machine and welding rod for use, weld with suitable current.Ln parameter blanking according in the last table curves circle with wire bending machine, guarantees circularity, and the seam points that each is round welds, and according to the thick line cavity curve of drawing, according to 1: 1 ratio blanking, curved line, attention will guarantee the curvature of curve each point again, and this point is most important! Two of cavity side lines (dotted line among the figure), each one of lineback, linea ventralis, totally 4.Because the material that is adopted is thinner, easy deformation during welding, thereby the method that will adopt control to be out of shape, be to weld after the first colligation, method is: minimum and maximum circle is the welding location earlier, complies with the size packets order colligation of circle again, note preventing walking of basic bone line, just welding can effectively prevent distortion like this, lose shape then, raises the efficiency.After welding 4 this bone of foundation lines, weld the reinforcing bone line of 4-16 root again, require on the uniform circle of 8-20 root bone line.After welding basic framework,, make an iron hoop the same with the installation position according to the installation position size of selected loud speaker, the thickness of ring should guarantee the needs that are threaded, bore equally distributed several through holes on ring, its position, size, quantity are the same with the loud speaker installation position, open screw thread.After installing ring is carried out, with the round tip-off of maximum, installing ring in the replacement, that notes during welding guaranteeing encircling is smooth.
(2) casing casting:
Because designed box-shaped is the class involute-type, the demoulding is inevitable very difficult, and concrete is exceeded sedimentation in the time of should guaranteeing to cast, and guarantees that again mould can take out smoothly, thereby adopts distributed filled internal mold.Comprehensive current material performance selects for use paper as packing material, and like this, existing intensity is taken out again easily, and simultaneously, after concrete was solid, the meeting nature formed the rough pattern of inwall, and this also helps the dissipation of loud speaker back side sound.During actual casting, the skeleton cavity internal mold of packing into, the compaction rate that internal mold is filled depends on thickness and the concavo-convex degree that inwall is required; Seal with loess the loud speaker installation place, mixes the system cement mortar with rapid condensation cement with certain proportion, casts at twice by two halves up and down.Should note guaranteeing the circularity of casing and the fineness on surface during casting, the faying face of branch half casting should smooth no gap.After cement is solid, take out loess and internal mold, the uniform screw of installing ring soaks whole concrete casing submerged with sealing with wax, and casing is further strong.
(3) casing lacquer painting:
Because unavoidable cause during casting, at this moment the inevitable coarse injustice of tank surface needs putty.With the floating not circle of commercially available putty place, doing the back ties with coarse sand cloth, if there is unsatisfied place to go up putty again one time, tie so 2---3 time after doing, casing can adhere to specification basically, begin japanning after having gone up putty, select common paint for use, modulate required color, as the step japanning of putty on the front, use fine sandpaper during polishing.At last, going up a varnish again gets final product.
(4) cabinet base:
Because the designed tank floor out-of-shape and the modeling requirement of casing itself so select for use the cuckoo tree root of root shape grace to manufacture base, also can adopt the way of solid wood engraving to make base.
(5) voice unit:
Voice unit does not need the noise reduction cavity, thereby installation is comparatively flexible, can be installed in the top or the side of spiral case casing, and this mainly depends on the needs.
3, casing debugging:
(1) loudspeaker unit is installed:
When installing, woofer should make sealing ring with periderm or other materials in the wheel earlier.Size, the degree of depth according to selected loud speaker installation place are cut the system sealing ring, on circle according to size, the orientation punching of installing hole.Weld built-in line, frequency divider, binding post is installed, the wiring of voice unit in like manner welds, require voice unit to install after should with the bass unit plane that exists together, both depend on the needs by distance between center line.
(2) audio amplifier debugging:
After all installing, can debug by high and low sound loud speaker.Make source of sound with suitable power amplifier, CD, VCD or DVD player and locate audition at casing in difference pendulum position repeatedly, add acoustical cotton (in general in loud speaker permanent magnet rearward end and cabinet wall as required, this casing does not need to place acoustical cotton), promptly finish speaker production after the satisfaction.
Embodiment:
Point sound source spiral case audio amplifier
1 cabinet design
(1) this Point source of sound speaker has the advantages that to make to measure, promptly according to the different model loud speaker of selected different manufacturers, according to the overall dimensions that it provided, recommend the casing net volume, and with reference to noise reduction outlet size and casing spread length and make, select different parameters for use, the box sizes of gained is different.
(2) selection of loudspeaker unit and accessory
Loud speaker adopts homemade favour prestige high pitch TN28 and middle bass M6N.High pitch TN28 is that ball is risen the sound unit, and its sound property is relatively good, and the influence of centering bass unit is less, and can independently install: effective work bandwidth of middle bass M6N is than broad, and low frequency is lower, and expressive force is horn of plenty more.Frequency divider adopts the special-purpose frequency divider of favour prestige Va2.1 audio amplifier, and inner sound source wire adopts silver jacketed wire, and external signal line adopts the special-purpose oxygen-free copper audio amplifier of favour prestige line, and binding post adopts common binding post.The unit is the configuration of Hui Wei Va2.1 audio amplifier, its objective is in order to do the acoustics contrast with commercially available favour prestige Va2.1 audio amplifier.
(3) cabinet design
The cavity of casing be for the medium and low spectrum loudspeaker unit designed, the high pitch loudspeaker unit can be without cavity, and voice unit and casing are discrete, thereby the design of spiral case audio amplifier mainly need consider in the overall dimension and the coupling casing dischargeable capacity thereof of bass unit, the size of audio amplifier noise reduction outlet during according to the size of the special noise-reducing structure of box house and the demoulding requirement and determine.According to favour prestige M6N loud speaker mounting groove diameter dimension 169mm, noise reduction outlet diameter size 30mm, Hui Wei M6N recommend casing net volume 12L, and casing spread length 1500mm obtains following concrete size:
Li 1500 1450 1400 1350 1300 1250 1200 1150 1100
Di 170.0 165.3 160.7 156.0 151.3 146.7 142.0 137.3 132.7
Vi 11.78 10.86 9.99 9.17 8.39 7.66 6.97 6.32 5.71
Ln 534.1 519.4 504.8 490.1 475.4 460.8 446.1 431.4 416.8
Li 1050 1000 950 900 850 800 750 700 650
Di 128.0 123.3 118.7 114.0 109.3 104.7 100.0 95.3 90.7
Vi 5.15 4.62 4.12 3.66 3.24 2.85 2.49 2.16 1.86
Ln 402.1 387.5 372.8 358.1 343.5 328.3 314.2 299.5 284.8
Li 600 550 500 450 400 350 300 250 200
Di 86.0 81.3 76.7 72.0 67.3 62.7 58.0 53.3 48.7
Vi 1.59 1.34 1.12 0.92 0.74 0.59 0.46 0.34 0.24
Ln 270.2 255.5 240.9 226.2 211.5 196.9 182.2 167.5 152.9
Li 150 100 50 0*
Di 44.0 39.3 34.7 30
Vi 0.16 0.09 0.04 0
Ln 138.2 123.6 108.9 94.2
Illustrate: the cavity circular diameter on the Di--circle directrix,
The D*--noise reduction exports initial circular diameter,
Circumference on the Ln--circle directrix,
Initial circle on the preliminary curve cavity circle of the Li--directrix and the distance between the current circle,
Constitute the volume of curve cavity between initial circle of Vi--and the current circle.
Wherein, long measure is mm, and volume unit is L.
According to last table mapping.As shown in Figure 1, select the involute of base circle diameter (BCD) 40 for use, diameter 40 main diameter and the concrete thickness of considering No. 5 iron wires.
1. as shown in Figure 1, the circle of diameter 40 is made involute for basic circle, measures the centre point of making each circle successively with the interval of 50mm, crosses the center of circle and makes the directrix that the line of each point obtains each circle, is followed successively by #1--#30.Round dot with this group circle is a benchmark, measures each diameter of a circle in the round dot both sides with divider through each round directrix and obtains two groups of intersection points, connects two groups of intersection points with the curve ruler slyness, obtains the preliminary curve cavity of doing according to involute.
Needs when 2. welding according to actual fabrication, circle is in the path inboard, and like this, the gap between screw of curve cavity need be considered the size (diameter 3.5mm) of No. 5 iron wires, welded gaps, gap between screw 10mm as shown in Figure 2, is got in follow-up gaps of going up putty and japanning etc.On #13 circle directrix, be as the criterion in #* circle points outside nearby and measure 10mm with the curve cavity, obtain the inboard point a of new curve cavity on #13 circle directrix, be as the criterion with a point, the #13 circular diameter is a line segment, on #13 circle directrix, measure this line segment, obtain the points outside A of new curve cavity on #13 circle directrix.Thereby obtain the outside intersection point % of preliminary curve cavity on the #13 circle directrix and this line segment of intersection point A Lm in the new curve cavity outside, measure this line segment Lm with divider, on #12, #11, #10, #9, #8 circle directrix, measure respectively, obtain points outside B, C, D, E, the F of new curve cavity, measure in circle directrix inboard inboard point b, c, d, e, the f of new curve cavity on each circle directrix.The intersection point of #1---#5 circle directrix and basic circle is inboard point m, l, k, j, the i of new curve cavity on each circle directrix.With slick and sly f, i 2 points of connecting of curve ruler, obtain new curve cavity at #6, inboard point h, g on the #7 circle directrix.Be benchmark with #7---#1 circle directrix g, h, i, j, k, l, m point respectively, with each circular diameter is line segment, measuring points outside G, H, I, J, K, L, the M of new curve cavity on #7---#1 circle directrix on each circle directrix with divider, with slick and sly G, H, I, J, K, L, the M each point of connecting of curve ruler.On #14---#26 circle directrix, be as the criterion respectively, measure 10mm, obtain inboard point n, o, p, q, r, s, t, u, v, w, x, y, the z of new curve cavity on #14---#26 circle directrix with new curve cavity intersection point thereon.Be as the criterion with these inboard points again, on #14---#26 circle directrix, measure each diameter of a circle, obtain the points outside N of new curve cavity on #14---#26 circle directrix, O, P, Q, R, S, T, U, V, W, X, Y, Z.Retouch the profile of the curve cavity that makes new advances with thick line, with dashed lines is made the center line of new curve cavity again.In like manner, make the part curve of new curve cavity on #27---#30 circle directrix.
According to the cavity curve of gained, be the rectangular coordinate system that benchmark was set up the basic circle center of circle with #10 circle directrix, #30 circle directrix is pulled to parallel with coordinate system+Y-axis, obtain new #30 and justify directrix.Nearby find out the solstics in coordinate system-X-axis, cross this point and make the parallel lines of coordinate system Y-axis, obtain adjusting round directrix, acting as of this adjustment circle: (1) installs favour prestige M6N loud speaker, (2) remedy the minimizing of the dischargeable capacity that produces because of new and old curve cavity adjustment, (3) loudspeaker position of installation is on the horizontal vertical plane, helps the perfect harmony of casing integral body, adjusting diameter of a circle is the maximum installation diameter dimension 179mm of favour prestige M6N loud speaker.Connect with curve ruler is slick and sly, finally obtain complete cavity curve.Loud speaker installation place with dashed lines is made the overall dimensions figure of Hui Wei M6N loud speaker in the drawings.
3, casing is made:
1. the making of box frame:
Select for use No. 5 iron wires to make material, select the dc welding machine that is easy to weld for use, common 422 diameters, 2.5 welding rods, electric current 90---120A welding.Ln parameter blanking according in the last table curves circle with wire bending machine, guarantees circularity, and the seam points that each is round welds.Again according to the thick line cavity curve of drawing, according to 1: 1 ratio blanking, curved line, two of cavity side lines (dotted line among the figure), each one of lineback, linea ventralis, totally 4.Because the material that is adopted is thinner, easy deformation during welding, thereby the method that will adopt control to be out of shape, be to weld after the first colligation, method is: minimum and maximum circle is the welding location earlier, complies with the size packets order colligation of circle again, note preventing walking of basic bone line, then just welding.Can effectively prevent distortion like this, lose shape, raise the efficiency.After welding 4 this bone of foundation lines, weld 4 again and reinforce the bone line, on 8 uniform circles of bone line.After welding basic framework, according to the installation position size of favour prestige M6N loud speaker, make an iron hoop the same with the installation position, require the thickness of ring to be not less than 5mm, 4 through holes of drill diameter 3mm on ring evenly distribute, and open the screw thread of diameter 4mm.
After installing ring is carried out, with the circle tip-off of maximum, installing ring in the replacement, that notes during welding guaranteeing encircling is smooth.
2. casing casting:
Because designed box-shaped is the class involute-type, the demoulding is inevitable very difficult, and concrete is exceeded sedimentation in the time of should guaranteeing to cast, and guarantees that again mould can take out smoothly.Unitary mould certainly can't the demoulding, thereby adopts the distributing filled internal mold.Present embodiment adopts old paper as filled internal mold, and existing intensity is taken out again easily, and simultaneously, after concrete was solid, the meeting nature formed the rough pattern of inwall, and this helps the dissipation of loud speaker back side sound.During actual casting, the skeleton cavity internal mold of packing into, seal with loess the loud speaker installation place, uses cement casting again.Adopt the label height, solidify the cement of typing easily, should note guaranteeing the circularity of casing and the fineness on surface during casting.After cement is solid, take out loess and internal mold, 4 screws of installing ring soak the whole box body submerged with sealing with wax, and casing is further strong.
3. casing lacquer painting:
Because unavoidable cause during casting, at this moment the inevitable coarse injustice of tank surface needs putty.With the floating not circle of commercially available putty place, doing the back ties with coarse sand cloth, if there is unsatisfied place to go up putty again one time, tie so 2---3 time after doing, casing can adhere to specification basically, begin japanning after having gone up putty, select common paint for use, modulate required color, as the step japanning of putty on the front, use fine sandpaper during polishing.At last, going up a varnish again gets final product.
4. nationality body base:
Because the designed tank floor out-of-shape and the modeling requirement of casing itself are so select for use the cuckoo tree root of root shape grace to manufacture base.Require the tree root jag graceful naturally, casing is placed on it steadily.Choose back tree root japanning light face.
5. voice unit:
Voice unit is that favour prestige TN28 ball is risen sound, and its installation is comparatively flexible, can be installed in the top or the side of spiral case casing, and this will depend on the needs.
4, nationality body debugging
(1) loudspeaker unit is installed:
When installing, woofer should make sealing ring with wheel inner tube of a tyre leather earlier.Size, the degree of depth according to favour prestige M6N loud speaker installation place deep gouge are cut the system sealing ring, and size, orientation according to installing hole on circle dash 4 apertures, need the folded mutually effect that could guarantee sealing of two circles.Weld built-in line, be positioned over rhododendron tree root base position at casing and chisel a hole, the built-in line other end that welds is passed, be welded on the frequency divider, frequency divider also is positioned over the idle place of tree root base.Through hole of sidetracking behind base is installed binding post, and frequency divider is welded on the binding post.The wiring of voice unit in like manner welds, require voice unit to install after should with the bass unit plane that exists together, both distances between center line are 150mm.
(2) audio amplifier debugging:
After all installing, can debug by high and low sound loud speaker, with sky ease AD--66H net work put, Malata's DVD player does source of sound audition, select for use be familiar with the CD sheet repeatedly at casing in the audition of difference pendulum position place, add acoustical cotton as required in loud speaker permanent magnet end, promptly finish speaker production after satisfied.
Claims (7)
1. point sound source spiral case audio amplifier, it is characterized in that: it is made of spiral helicine cavity and loud speaker, the spread length 500mm-5000mm of casing, the size 20-70mm of noise reduction outlet, gap between screw 3-40mm is provided with one section in the installing port end of loud speaker and remedies volume, in remedying volume, be provided with loud speaker, box shape is the scroll of gradually closing, increases the deadweight of casing, and cabinet wall is indenting state.
2. the manufacture method of a point sound source spiral case audio amplifier is characterized in that:
Li＝Li
Di＝(Di-D*)×Li+1/Li+D*
Vi＝π×(Di+D*)×Li×10-6
Ln＝π×Di
Illustrate: the cavity circular diameter on the Di-circle directrix, the D*--noise reduction exports initial circular diameter, circumference on the Ln-circle directrix, initial circle on the preliminary curve cavity of the Li-directrix and the distance between the current circle constitute the volume of curve cavity between initial circle of Vi-and the current circle; Wherein, long measure is mm, and volume unit is L;
Concrete manufacture method is as follows:
Concrete manufacture method is as follows:
A, mapping:
(1) preliminary casing curve chart: selected basic circle is made involute, on involute uniformly-spaced to make the centre point of each cavity circle successively, cross the cavity circle centre point and the basic circle center of circle and make ray, obtain the directrix of each cavity circle, determine each cavity diameter of a circle Di according to above-mentioned formula, each cavity circle is connected the preliminary casing curve chart that constitutes thus according to the involute work;
(2) semi-finished product casing curve chart: four end points up and down by each cavity circle connect respectively, obtain lineback, linea ventralis and left and right side line on the preliminary curve cavity.Because the gap between screw of preliminary curve cavity is bigger, volume is little in order to obtain, the casing of compact conformation, with each cavity circle on the preliminary casing curve along directrix to the translation of the basic circle center of circle, should regard involute as receives in basic circle, each cavity circle after the translation is reconnected, gap between screw is equal to, or greater than be used to the twice of the diameter of making audio amplifier skeleton wire rod, so just obtains semi-finished product casing curve chart;
(3) remedy the audio amplifier cavity: because involute is to the interior receipts of basic circle, make the volume of the volume of semi-finished product curve casing less than preliminary curve casing, the volume of the preliminary curve casing that equals to set for the volume that guarantees the finished product casing, be provided with in the port of the audio amplifier curve that loud speaker is installed and remedy the audio amplifier cavity, finally obtain complete finished product casing curve chart;
B, the concrete making:, make the finished product casing according to above-mentioned complete finished product casing curve chart;
(1) box frame is made:
Making cavity circle:, make the back of the body, abdomen, left and right side line and series circle according to above-mentioned cavity diameter of a circle dimension D i and the back of the body, abdomen, the blanking of left and right side line Ln parameter; Greatest circle and smallest circle are fixed in the two ends of the back of the body, abdomen, left and right side line inboard; According to drawing each is justified the corresponding position that is fixed in order in the back of the body, abdomen, the left and right side line again, form the casing basic framework; After welding basic framework,, make an iron hoop the same, the needs that the thickness of ring enough is threaded with the installation position according to the installation position size of selected loud speaker; The relevant position is drilled with through hole on ring, is used to install loud speaker; After installing ring was carried out, with the round tip-off of maximum, installing ring in the replacement made box frame;
(2) casing casting:
The distributed filled internal mold of in the skeleton cavity, packing into; Loud speaker is installed port seal, use rapid condensation cement then, cast at twice by two halves up and down with loess, after cement is solid, take out loess and internal mold, the screw of installing ring is with sealing with wax, whole concrete casing submerged is soaked, and casing is further strong;
(3) casing lacquer painting:
Putty on tank surface makes casing circularity and smoothness can meet designing requirement, japanning light face behind the upward intact putty;
(4) cabinet base:
Because the designed tank floor out-of-shape and the modeling requirement of casing itself are provided with corresponding base in the bottom of casing.
3. the manufacture method of point sound source spiral case audio amplifier according to claim 2, it is characterized in that: the iron wire that box frame is selected for use is made material, select dc welding machine for use, common 422 welding rods, curve circle with wire bending machine, guarantee circularity, the seam points of each circle is welded, again according to the thick line cavity curve of drawing, ratio blanking according to 1: 1, curved line, and the curvature of assurance curve each point, minimum and maximum circle welding earlier is positioned at two side lines of cavity and lineback, the two ends of linea ventralis, again according to the size of circle by every tetrad with each circle order colligation at cavity left and right sides side line and lineback, on the fixed position in the linea ventralis, just welding then, after welding 4 this bone of foundation lines, weld the reinforcing bone line of 4-16 root again, require the 8-20 root to reinforce on the uniform circle of bone line, weld basic framework after, installation position size according to selected loud speaker, make an iron hoop the same with the installation position, the thickness of ring should guarantee the needs that are threaded, 4 through holes of drill diameter 3mm on ring, evenly distribute, open the screw thread of diameter 4mm, after installing ring is carried out, with the round tip-off of maximum, installing ring in the replacement, that notes during welding guaranteeing encircling is smooth.
4. the manufacture method of point sound source spiral case audio amplifier according to claim 3, it is characterized in that: adopt paper as distributed filled internal mold, at the skeleton cavity paper internal mold of packing into, seal with loess the loud speaker installation place, use rapid condensation cement, mix the system cement mortar by a certain percentage, cast at twice by two halves up and down, should guarantee the circularity of casing and the fineness on surface during casting, the faying face of branch half casting should smooth no gap.
5. the manufacture method of point sound source spiral case audio amplifier according to claim 4, it is characterized in that: putty on outside the concrete loudspeaker box of casting, floating not circle place, doing the back ties with coarse sand cloth, so 2---3 time, fine sandpaper is used in japanning, polishing again behind the upward intact putty during polishing, at last, going up a varnish again gets final product.
6. the manufacture method of point sound source spiral case audio amplifier according to claim 5 is characterized in that: select for use the cuckoo tree root of root shape grace or solid wood engraving to manufacture base.
7. the manufacture method of point sound source spiral case audio amplifier according to claim 6, it is characterized in that: should make sealing ring with periderm or other materials in the wheel earlier when woofer is installed, size, orientation according to installing hole on sealing ring dash 4 apertures, weld built-in line, frequency divider, binding post is installed, the wiring of voice unit in like manner welds, require voice unit to install after should with the bass unit plane that exists together.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03103087 CN1254151C (en) | 2003-01-29 | 2003-01-29 | Pointsound-source spiral-casing sound box and its making method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03103087 CN1254151C (en) | 2003-01-29 | 2003-01-29 | Pointsound-source spiral-casing sound box and its making method thereof |
Publications (2)
| Publication Number | Publication Date |
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| CN1438818A CN1438818A (en) | 2003-08-27 |
| CN1254151C true CN1254151C (en) | 2006-04-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 03103087 Expired - Fee Related CN1254151C (en) | 2003-01-29 | 2003-01-29 | Pointsound-source spiral-casing sound box and its making method thereof |
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| Country | Link |
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| CN (1) | CN1254151C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103236224A (en) * | 2013-04-12 | 2013-08-07 | 贵州大学 | Publicity and display instrument |
| US10547933B2 (en) | 2015-07-21 | 2020-01-28 | Novel Acoustics Ltd. | Loudspeaker and method of its manufacture |
| EP3469808A4 (en) | 2016-01-05 | 2020-03-25 | Novel Acoustics Ltd | Headphone or earphone device |
| GB2620430A (en) * | 2022-07-08 | 2024-01-10 | Nisim Dahan Midbar | An enclosure for an electroacoustic transducer |
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2003
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| CN1438818A (en) | 2003-08-27 |
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