CN1500364A - Loudspeaker - Google Patents

Abstract

A loudspeaker (104) comprising a box-form structure made from stiff lightweight sheet material to define a plurality of faces (34), at least one face (34) of the structure forming a panel-form bending wave acoustic radiator and having an electro-acoustic vibration transducer (106) coupled thereto to apply bending wave energy to the radiator to cause it to radiate an acoustic output when an input signal is applied to the traducer, the box-form structure being collapsible, so that the box-form structure can be stored and transported in a flat form and erected as a box when required as a loudspeaker.

Description

Loud speaker

Technical field

The present invention relates to loud speaker, particularly bending wave plate loudspeaker, for example type of general description in WO 97/09842.

Background technology

The structure dress mode of the plate loudspeaker of one distribution pattern wherein is provided by No. 97/09855, WO as can be known.

Summary of the invention

The invention provides a kind of loud speaker, described loud speaker comprises a case structure, this case structure is made to limit a plurality of panels by the rigid lightweight material plate, at least one panel of this structure forms a plate shape bending wave acoustic radiator and has a mutual with it electroacoustic vibration transducer that links so that crooked wave energy is added on the acoustic radiator, make its voice output of radiation when transducer is carried out an output signal, this case structure is a folding, so case structure can be stored and transport and uprightly become a casing when needed and use as loud speaker with folded flat form.

The material of hard material for supporting voluntarily, case structure can be made by folding rigid lightweight material plate, and this material has the pliability that is enough to do folded flat packing in burst.Therefore, case structure can be formed by can significantly simplifying the single-piece light material of making and assembling, crease between at least two adjacent surface plates can be for singly rolling over or comprise the crease of pair of parallel, described two-fold seam can provide extra flexibility and bigger separation between each panel, groove can be set with the formation crease on plate of material, and can groove be set by the part of plate of material is compressed.

Perhaps, when being made of a plurality of not collapsible rigid lightweight material plate plates as case structure especially, described plate can be linked by connectors such as for example adhesive tapes at the edge of plate, and preferable connector comprises hinge so that plate can move relative to each other.

Crease or connector can be continuous or discontinuous, and crease or connector can allow the crooked wave energy of transmission between panel, therefore, but described panel mechanicalness and acoustics combination.Utilize this mode, a transducer only need be attached to a panel, and adjacent panels just can be subjected to striding across the bending wave the subject of knowledge and the object of knowledge driving of crease transmission, if crease or connector have the deflection impedance, that is has residual bending strength after folding, then can utilize this mode.

Perhaps, crease or connector can have fully flexible, so that folding or connector is as a simple bearing edge terminal of an excited target plate.Therefore, the panel adjacent with acoustic radiator is mainly as baffle, can improve the bass response of acoustic radiator thus, and baffle may be roughly opening or closed.

Case structure can be any suitable geometry, for example cuboid, cube or prismatic and the possibility opening or sealing.For example, preferable case structure can be the rescinded angle taper with triangular base, triangular base means that the side panel adjacent with acoustic radiator is one to have effective baffle that the bigger degree of depth is arranged than other shapes bottoms such as rectangle with respect to acoustic radiator, and the surface plate of rescinded angle may be that the surface plate with the pyramid bottom is skewed for example 20 ° of angles.

The rigid lightweight material plate can be a kind of such as packaging material such as corrugated boxboard or analogs, and this corrugated boxboard can be the type that surperficial flaggy clamping has a corrugation central layer.Perhaps, the rigid lightweight material plate can be the vacuum forming plastics or extrude the double-walled polypropylene board, the plate that for example roughly is equal to corrugated boxboard and sells with " Kou Ruisi (Correx) " trade mark.The configuration of corrugated material is can be vertical extent with structural base or extend with an acute angle, and that these materials can produce is extremely light, the loud speaker of portability, low cost and disposable type.Perhaps, can use more durable, long-acting or more high performance plate of material, for example the plate of selling with " Zhuo Malaite (Traumalite) " trade mark.

Template bending wave acoustic radiator can be resonance and loud speaker can be to belong to distribution pattern (distributed mode) type, therefore, can select the character of template acoustic radiator that the resonance bending wave pattern of its acoustic radiator is roughly distributed on frequency equably.In other words, character that can be by selecting the template acoustic radiator or parameter be size, thickness, shape, material etc. for example, with " bearing against (bunching) " in the described pattern or assemble the frequency response peak value that is caused and smoothed.

Case structure can be accordion (concertina) or double spread (fold-out) form, and can be used for increasing the image width by the folding of the multiple accordion of designing, for example, one panel of case structure may be provided with crease one, so that this panel is folded in from one's body case structure being folded.The crease of described panel may roughly be positioned at the central authorities of panel, but make this panel doubling half with folding case structure.One plate possible configuration is in the contiguous place of crease and may combine with a panel of case structure, and plate is the extend through crease when structure is upright, to prevent the folding of described panel on a direction.Use this mode, therefore described panel only may can fold the loss of putting down the packing loud speaker and can not causing stability or intensity toward interior folding.

Case structure may comprise that one supports flap, and this supports on the panel that flap is connected to case structure and collapsiblely to support at least one adjacent panels case structure is kept upright.Supporting flap can support two adjacent panels (for example both sides panel) and can strengthen overall structure, supporting flap also can be as a separator between the inner surface plate of two adjacent surface plates when case structure is folding, providing a cavity to come receiving transducer, and has the transducer that combines on one of them inner surface plate.

Transducer can be a moving-coil inertia-powered device, and it comprises a magnet assemblies and a voice coil loudspeaker voice coil assembly.Because transducer is installed on the ramped surfaces plate, cause magnet assemblies to produce bad non axial moving so have uneven mass loading.Therefore, magnet assemblies can be supported in the transducer housing, this transducer housing is to be installed on the acoustic radiator, and housing is to make the transducer quality plastic cement support ring that do not interosculate of panel therewith, and magnet assemblies can be fixed to housing by the foam pad as radiator.Transducer housing can stop magnet assemblies to produce bad non axial moving, the therefore infringement that can alleviate voice coil loudspeaker voice coil, and can limit departing from of transducer.

Perhaps, transducer can be the transducer (for example WO disclosed for No. 01/54450 type) of inertia or ground connection formula vibration transducer, piezoelectric transducer, magnetostriction transducer, bending or warping property transducer (for example WO disclosed for No. 00/13464 type) or distribution pattern.

Can form a template bending wave acoustic radiator with not only panel, a transducer can be installed on each panel and form a template bending wave acoustic radiator, with the bending wave vibration in the excitation acoustic radiator.By transducer being arranged at not only on the panel, can obtain three-dimensional source of sound by single object.One transducer can be mounted to each panel of case structure, with the one-way of improvement high frequency.

Loud speaker can have spring up type (pop-up) design, assembles loud speaker so can push or pull action by one.Perhaps, loud speaker may have outer bullet formula (snap-out) design, to reduce assembling required time and energy.Can in putting, folded flat structure assembling use dump bolt to keep case structure, and outstanding right for spring up type or the design of outer bullet formula.Loud speaker can comprise ground connection formula engagement seats, can be to upspring or the clip bearing.

Therefore, the invention provides a kind of lightweight collapsible loud speaker, it can be used as a Hi-Fi, AV or performance loud speaker, because weight saving and volume reduce, can transport and warehouse cost provides the dispensing of improvement with lower, also loud speaker purposes from the table can be amplified becomes large floor formula case structure.

Technology is used and is comprised following collapsible form: lightweight mega bass loud speaker (subwoofer), be centered around for example multimedia monitor such as computer or notebook computer multimedia speaker on every side, the PA system, adopt the lectern of PA system, the multipole bar broadcast system of mount type on suspension or the bar, the music canopy, listen to the music/talk with Wendy's room (wendy house) for child, can be for the musical toy/model of children's assembling, loud speaker is showed in sales promotion, be used to improve the extensible baffle of the portable meeting/individual hands-free product of low frequency characteristic, bedside travelling unit with sound wafer, personal head-mounted system, Portable tone chamber and the lampshade that can tolerate towards others and enter into.

Exhibit generally need be transported in folded flat structure dress mode in " Point Of Purchase (point of purchase) " market, and especially for than wisp, for example when amplifier head room and battery life were difficult for obtaining, the low frequency performance of improvement will be of great use.For the businessman, the chance that image is covered whole body surface plate is also attractive.And, loud speaker can be made the outward appearance of product such as similar for example Hui Tebisi (Weetabix ) coverboard or holder Bai Rong  (Toblerone ) chocolate bars or packing.

Description of drawings

The present invention will be described by way of example and with reference to the accompanying drawings, wherein:

Fig. 1 is the perspective view according to the loud speaker of part assembling of the present invention;

Fig. 2 is in the perspective view of folded flat structure dress form for the loud speaker of Fig. 1;

Fig. 3 a to 3f is the perspective view according to the loud speaker of six alternate embodiments;

Fig. 4 is the perspective view according to a loud speaker of another kenel of the present invention;

But going up of the loud speaker of Fig. 4 a and 4b displayed map 4 reaches release type locking mechanism down;

Fig. 5 is the perspective view of one loud speaker of another kenel according to the present invention;

Fig. 5 a and 5b are the posterior spinal of loud speaker of Fig. 5 and the cutaway view of lateral ridge post;

Fig. 5 c is the surface plate figure of loud speaker before assembling of Fig. 5;

Fig. 5 d, 5e and 5f are the perspective view of the loud speaker of Fig. 5 in each stage of assembly process;

Fig. 5 g is in the perspective view that folded flat structure is adorned form for Fig. 5's through the assembling loud speaker;

Fig. 6 a is the perspective view according to a loud speaker of another kenel of the present invention;

Fig. 6 b is the cutaway view of a bearing of the loud speaker of Fig. 6 a;

Fig. 6 c and 6f are the perspective view and the end view of connector board of the loud speaker of Fig. 6 a;

Fig. 6 d and 6e are the transducer of loud speaker of Fig. 6 a and the surface plate and the end view of connector shell;

Fig. 7 a, 8a and 9a and 7b, 8b and 9b are respectively the view sub-anatomy that alternative linkage is in open and closure state;

Figure 10 a is the perspective view of one loud speaker of another kenel according to the present invention, wherein shows an alternative linkage;

Figure 10 b is the view sub-anatomy of a hinge, shows that wherein power transfer passes through hinge;

Figure 11,12a and 12b are the perspective view of alternative loud speaker;

Figure 13 is for being used in the mode profile of two bending wave plates in the loud speaker shown in Figure 4;

Figure 14 is for the voice response of the loud speaker of Fig. 5 (sound pressure decibel value vs. frequency).

Concrete enforcement

Fig. 1 and 2 shows that according to a loud speaker 10 of the present invention among Fig. 2, loud speaker 10 is for folded flat structure dress form, for example is used to transport and store usefulness.Among Fig. 1, loud speaker 10 has passed through partly assembling, wherein will go up and lower flap portion is converted into a rectangular structure roughly toward in, as box, to finish loud speaker 10.As shown in the figure, lower side flaps 14 and down preceding flap 16 are respectively with past invagination in arrow A and the B direction.Fig. 3 e shows the assembling form fully of the loud speaker with the box structure of a cuboid.

Loud speaker has a case structure, and this case structure has a plurality of panels that are used to define a volume.Front panel 12 formation one can be supported the several radiators of template bending wave of bending wave vibration (being preferably resonance bending wave pattern), and a transducer 18 is attached to front panel 12 to drive bending wave vibration to produce a voice output in plate.Transducer 18 shows with the point-like dotted line in the drawings and is installed on the inboard of front panel 12, that is is positioned at case.

Fig. 3 a to 3f shows six alternative upright case shape loud speakers, thereby each loud speaker can have the casing that a closure is defined in a bottom.Perhaps, the bottom may be defined by the surface plate that loud speaker is stood.Fig. 3 a, 3b, 3c and 3f show prism, and each prism has four side panels that extend from rectangle bottom.In each figure of Fig. 3 a, 3b and 3c, two relative side panels and bottom vertical, and prismaticly have by relative panel defined a fixing section.

Among Fig. 3 a, prism has a rectangle end face 20, and the four sides plate extends top panel so far and prismatic two opposite sides panel 22 for trapezoidal.Fig. 3 b shows the prism of a complexity, and the prism of this complexity is the prism that comprises Fig. 3 a that is installed on the cuboid.Fig. 3 c shows a prism, and its four side panel intersects on same line, and its two opposite sides panel 27 is triangular in shape.Fig. 3 f shows the prism be similar to Fig. 3 c but difference is each side panel is to be an inclined at acute angles with the rectangle bottom.Fig. 3 d shows a four sides plate body, and wherein each panel comprises that the bottom is all triangular in shape.

Fig. 4 is a loud speaker 30, it has the PYR upright case structure of rescinded angle of equilateral triangle bottom, the rescinded angle surface plate is that the surface plate bottom pyramid is 20 ° of angles approximately, the triangular base shape has provided the ratio of maximum side panel/whole case size, pyramid is made by a corrugated boxboard, the high-quality clay involucrum surface coating that this corrugated boxboard has high intensity/quality ratio and is particularly suitable for any needed design of printing on the pyramid panel, hardboard belongs to the type that is clamped a corrugation central layer by surface plate.

One transducer (not shown) is mounted to a panel of pyramid and is connected with an audio signal by audio frequency connecting portion 32, because have only a transducer, loud speaker only has a panel 34 to be subjected to direct-drive, and this panel constitutes a template bending wave acoustic radiator, both sides panel 36 in addition, bottom and top panel 38 are attached to the excited target panel by crease 40 mechanicalnesses, make the excited target panel be subjected to simple support with this along its all edges, in addition two side panels 36 for the excited target panel mainly as baffle, vibrational energy can be striden across crease 40 transmission, therefore make other panel, particularly both sides panel 36 also is attached to the front panel 34 of excited target acoustics and thereby is encouraged in addition.

For previous embodiment, case structure is converted into folded flat-shapedly conveniently to transport and/or to store, therefore connect into right panel as hinge and make two panels to rotate relative to one another by single continuous crease.But loud speaker 30 comprises and following release type locking mechanism 42,44, but go up and down release type locking mechanism 42,44 be connected to the flange 46 that extends along crease, this crease is used to engage both sides panel 36.Fig. 4 a figure shows the last mechanism 42 that comprises a flap 48, and this flap 48 is down rolled over and is fixed to flange 46 by a fixture from top panel 38 with the arrow A direction.Fig. 4 b shows the following mechanism 44 that comprises a flap 50, and this flap 50 plate was from the side rolled over and was fixed to flange 46 by a fixture, and fixture can be Velcro (VelcroTM) or analog or fixed disk, to be easy to assembling and to disassemble loud speaker.

Fig. 5 shows that one roughly is similar to the loud speaker 100 of Fig. 4, so common feature is to have identical numbering.Difference with Fig. 4 among Fig. 5 is that front panel 34 is connected to both sides panel 36 by a crease 102, these folding 102 creases with pair of parallel, and audio frequency connecting portion 32 is connected to a connector plate 108 (seeing Fig. 6 c).

Fig. 5 a shows the posterior spinal that is used to connect both sides panel 36, and this posterior spinal is to stitch 102 forms by a glue junction surface 114 permanent attached two-folds, and this glue junction surface 114 engages the flap on the side panel with the opposite side panel.Fig. 5 b shows that one is stitched the crease of 102 forms with front panel 34 with the two-fold that a side panel 36 is connected.

Fig. 5 c to 5f shows the loud speaker that is come shop drawings 5 by whole hardware slab material of a special shaping, the blank shown in Fig. 5 c comprise be roughly the rescinded angle triangle and before loud speaker forms it during uprightly as a casing with the integral slab of side panel 34,36.Be used to form that central flap 122 and central flap 124 become one on the plate and of front panel 34 once, go up central flap 122 and down central flap 124 are top and the bottom panels that form the loud speaker of having assembled respectively.Central flap 124 is provided with two holes 140 down, to guarantee that correctly aiming at a transducer installs jig, therefore can make transducer accurately be positioned on the front panel 34.Going up central flap roughly is the triangle with other two lateral plates and has an auxiliary medium pore 132 of assembling.

Each forms on the plate and of a side panel 36 and a downside flap 116,118 becomes one, and flap can be along single crease and side panel and relatively moves.One side panel 36 comprise a central crease 138 and towards the aperture 134 at panel top to help folding this case structure.Opposite side panel 36 comprises a hole 136, in the connector board patchhole 136 and this side panel become one with a side flap 120, side flap 120 turns over formation glue junction surface.Each lower side flaps 118 comprises a groove 130, and this groove 130 is corresponding to the plate 128 on the following central flap 124.The lower side flaps 118 that can become one with the side panel 36 with central crease 138 forms two, and wherein one has a plate 164 and moves outward along folding 138 preventing when case structure assemble, and an adhesive tape 126 is attached to and reaches lower flap portion on each.

Hardboard comprises two surface plate, the two panels skin clamps a corrugation central layer, this corrugation central layer contains two surge layer of being separated by the intermediate layer, last surge layer is by the white top panel brown paper of 180gsm, promptly have the high-load wood pulp and be mixed with the paper that reclaims paper and constitute, and surge layer is made of 190gsm soft clay coated paper down, and therefore, hardboard is BE 190Y 180W type.The bottom of the ripple of hardboard and front panel orientation is arranged perpendicular, make front panel in the direction parallel, have with the bottom than with the direction of bottom vertical in bigger rigidity.Because the cause of blank shape, can form the ripple of the hardboard in the plate of side panel and the bottom of each side panel and be an acute angle.

Constitute each crease between the plate by hardboard pressurization being formed groove or gauffer, utilize a round edge steel bar to dash and cut blanks in the time of can be die-cut, but only this steel bar is pushed the degree of depth wanted in the plate of material to make gauffer.Can use a rubber strip of putting on the press platen that forms other gauffers to extrude a gauffer, to form the central crease on the side plate.Central authorities' crease 138 is folded inverted with other crease between plate, form gauffer on the blank panel that therefore will be opposite with other gauffers.

The following assembling of the case structure of loud speaker, before the case structure assembling, transducer and connector board preferably are fixed on the relevant panel.

A) will go up and side panel 36 that lower side flaps 116,118 distinctly is folded on; Adhesive tape 126 is attached to flap on the described panel (sees Fig. 5 D), and an available heat is melted processing and reached same effect

B) will go up and down folding 122,124 foldings of central authorities live front panel 34, by turning down each flap, make the quantity of the cutting surface plate that exposes reduce.Therefore, to the loud speaker that constitutes by hardboard, can improve the water proofing property of loud speaker.

C) along having the folding crease 102 of pair of parallel with side panel 36 past invaginations.

D) form posterior spinal, this posterior spinal is that side flap 120 is glued to a side panel and has engaged both sides panel 34.

E) will descend central flap 124 to be pulled away from front panel with Fig. 5 E direction of arrow, and plate 128 is locked in each other groove 130, following central flap 124 is to be supported on both sides panel 36 and conduct support flap and reinforcement overall structure.

F) utilize medium pore 136 will go up central flap 122 and be pulled away from front panel, so the top panel lock in place is also finished whole assembling at this moment with Fig. 5 F direction of arrow.

Can be folded into the folded flat structure shown in Fig. 5 G through the loud speaker of assembling and adorn form, at first, via exerting pressure and make top panel shift out its latched position in the hole on side panel 36 134.Case structure is realized 180 ° folding along the crease 138 that extends along side panel toward interior folding then, side panel through folding defines a W type profile plate together with other panel, case structure can be by launching once again uprightly as a case, therefore this structure can be considered as the accordion pattern through folding folded formation.

Case structure selectively keeps folded level state by dump bolt 142 or other securing members, and following central flap 124 (or supporting flap) is as the distance piece between the inner surface plate of preceding and side panel, so that a cavity that is used to take in transducer to be provided.Perhaps, two-fold seam 102 may perhaps can portal in the side panel cutting as distance piece, being that transducer assemblies provides the gap when loud speaker is down folding.

Fig. 6 a shows that one roughly is similar to the loud speaker 104 of Fig. 4 and 5, so common trait is to have identical numbering.Fig. 6 a shows the position of the transducer 106 on the inner surface plate of the front panel 34 be installed in excited target.Transducer position can produce optimized voice output from loud speaker through selecting, and transducer 106 is connected to connector board 108 by connecting portion 110, and the ground connection bearing 112 shown in Fig. 6 b is attached to the bottom of loud speaker 104.

Fig. 6 c and 6f show connector board 108, and this connector board 108 comprises a roughly rounded plate 148, and plate 148 has three devices 144 that are fastened and connected connector board is fixed to a side panel of case structure.A plate 148 and a chamber shape member 150 are one-body molded, box-like frame members 150 is to have a Wiring area 146, Wiring area 146 is to supply the connecting portion of next audio frequency connecting portion in source and transducer to link from an audio frequency, and connecting portion can cooperate a rapid release connector in order to avoid be damaged to transducer when fiercely spurring cable.Plate 148 is provided with all from the bearing 166 and an outer rim 168 of a wainscot projection, uses and defines a cavity that is used for protection transducer when folded flat structure is adorned this case structure.

Fig. 6 b and 6e show transducer 106 and housing 152 thereof, and transducer is a moving-coil inertia-powered device and comprises a magnet assemblies 154 and a voice coil loudspeaker voice coil assembly 156.Transducer 106 is connected to connector board with connecting portion 110, because transducer is installed on the skewback, may cause bad the moving of magnet assemblies so have uneven mass loading.Therefore, except voice coil loudspeaker voice coil assembly 156 being directly installed on a panel of case structure, magnet assemblies 154 is supported in the transducer housing 152.

Transducer housing 152 is one can make the form of the plastic cement support ring that transducer quality and panel do not combine, support ring comprises 155 and three curved booms 158 away from cup 155 extensions of cup that cover transducer 106, and each end of arm 158 is mounted to panel by elasticity sticky pad 160.Magnet assemblies 154 is fixed in the cup 155 by the elastic foam pad 162 as radiator, and transducer housing can stop magnet assemblies to produce bad non axial moving, and therefore alleviates the infringement of voice coil loudspeaker voice coil and can limit departing from of transducer.

Fig. 7 a to 10a demonstration is used for connecting alternative linkage or the crease that is positioned at the paired panel of loud speaker, and in Fig. 7 a to 8b and Figure 10 a, hinge and panel become one, and therefore can form adjacent panel by from one piece.Among Fig. 9 a and the 9b, hinge is the separating member of a connection two panels, so two panels can be made by different part materials.

Loud speaker can be made by a kind of Foldable material, and for example one has the full wafer body (monolith) of a collapsible central layer or covers dermatotome.One hinge can be provided with the V-shaped groove shown in Fig. 7 a and 7b, Fig. 7 a and 7b demonstration are in respectively with folded flat structure dress form and through the corresponding opening of loud speaker of assembling box and the hinge of closure state, each panel is to be made by a composite plate, and composite plate comprises the central layer 60 of a clamping between two epidermis plates 62.One V-arrangement section of excision central layer, comprise a surface plate, the point of V-arrangement be define fulcrum 66, one panels that described panel rotates relative to one another can be in the arrow B direction (Fig. 7 a) rotates to the position (Fig. 7 b) that two panels is perpendicular to one another from making two panels be in a position of same level plate.In the groove district, add reinforcement and be with 64, strengthen band and extend in the hinge inboard of closure along the both sides of plate.

Fig. 8 a and 8b show a double-strand chain, this double-strand chain comprises that therefore two V-shaped grooves shown in Fig. 7 a and the 7b have identical numbering, each panel rotates to from a position that makes two panels be in the same level plate in arrow C and D direction and makes the parallel but position of coplane not of two panels, thus reach 180 ° folding.

Fig. 9 a and 9b show two panels 52, and two panels 52 separates, to define the gap that approximates each plate thickness greatly and to be connected by one the 68 type single-coated foam connector that constitutes hinge.One panel can be in the arrow B direction (Fig. 9 a) rotates to the position (Fig. 9 b) that two panels is perpendicular to one another from making two panels be in the position of same level plate.This single-coated foam is have height internal drag and suitable high tack adhesive through selecting, and this panel is if made by the central layer of pulverizing material, single-coated foam can prevent loose edge creak caye make a sound.This panel still is fit to adopt this configuration if made by Foldable material not.

Figure 10 a shows that one is used to connect the discontinuity simple chain 51 of two panels 52, and hinge 51 comprises crease 54 and excision section or opening 56 between crease.

Hinge or folding crease should have enough pliabilities so that loud speaker is folded flat structure dress, and the pliability of hinge may be from roughly can not having flexible degree to complete flexible degree substantially.If be flexible fully, this hinge is as a simple edge termination that supports of an excited target plate and seldom be with or without crooked wave energy and transmitted hinge.Perhaps, if hinge does not have pliability substantially, that is have residual bending strength after folding, then crooked wave energy can be transmitted hinge from an excited target panel and go to an adjacent panels.Though have loss when increase frequency, possible design of hinges makes the crooked wave energy of its all frequency transmission in opereating specification, that is at least up to 20 KHz.

Figure 10 b shows that crooked wave energy is driven panel 76 from one and transmitted a hinge 80 and went to an adjacent panels 78, the bending wave that is driven in the panel causes along a rotatory pivot action (arrow D) of the longitudinal axis of hinge 80, by hinge 80 crooked wave energy is imported in the adjacent panels 78, from the bending wave that is driven panel 76 arrive at hinge 80 as partial side to angular displacement, convert this partial side the displacement of the opposite polarity in the adjacent panels 78 to angular displacement by hinge 80, the displacement of opposite polarity is to have to equate with the home position and reverse angle and according to the long-pending quality (areal mass) of the panel of panel 78, rigidity and inertia import bending wave in the adjacent panels 78.As showing respectively shown in the arrow E and F that is driven the local buckling ripple direction of vibration in panel 76 and the adjacent panels 78, adjacent panels 78 is encouraged with the antiphase ground (anti-phase) that is driven panel 76.

Figure 11,12a and 12b show open case structure, that is completely or partially lose or remove its at least one panel.Among Figure 11, loud speaker roughly is the pyramid of a rescinded angle square bottom, this loud speaker has the preceding and side panel 82,84 of general triangular, and a transducer 88 is mounted to above-mentioned each panel, makes each panel form a template bending wave acoustic radiator that is separately driven.Rear board 86 is for passive and may be pro forma active (modallyactive) via the sound be combined into that strides across hinge as described above, rear board 86 is to comprise two sections, separated by a gap after two sections as the ventilating part of loud speaker, rear board 86 is the 84 antemarginal actions of control side panel, rear board can increase effective baffle size, and can improve bass response.

Among Figure 12 a and the 12b, loud speaker comprises a rescinded angle triangle front panel 82 and two triangle side plates 84, and front panel 82 is subjected to a transducer (not shown) and drives, and with side panel 84 as baffle.The back edge of side panel is to define a rear board 92,94 of opening, and Figure 12 a shows a baffle of roughly closing, and wherein the back edge of side panel is almost met.Therefore, the rear board 92 of unlatching is very little and the lower limb of the lower limb of each side panel and front panel is a sharp angle.Figure 12 b shows a baffle of roughly opening, and wherein the rear board 94 of Kai Qiing is that the lower limb of very big and each side panel and the lower limb of front panel are an obtuse angle θ, and open plate washer generally has bigger amount of bass.

Among each embodiment, each template bending wave acoustic radiator can be other the distribution pattern acoustic radiator that disclosed of application as No. 97/09842, WO and the applicant, therefore may select the template acoustic radiator character so that the resonance bending wave pattern of its acoustic radiator on frequency, distribute on a rough averagely.Special size with reference to is as shown in figure 13 compared denser with the modal distribution 72 with the acoustic radiator that dwindles 50% analogous shape and is distributed more fifty-fifty and extend to lower frequency for the modal distribution 70 of big triangle template acoustic radiator.Particularly, bigger acoustic radiator is to have the low frequency mode (that is the pattern below 500 hertz) that more is evenly distributed.Can be by interweaving and form this distribution on a rough average with the relevant low frequency mode of axis of respectively conceiving of template acoustic radiator.

Parameter by suitably selecting loud speaker and transducer position will help the sound output that provides good, Figure 14 is shown in the frequency response of the loud speaker of Fig. 5, this loud speaker has two plane edges of boards that present 515 millimeters and 157 millimeters, i.e. the trapezoidal front panel of the height (that is spacing of two parallel edges) of base and top margin and 715 millimeters.Transducer with the base at a distance of 256 millimeters and be installed on the inner surface plate of front panel at a distance of 52 millimeters position with the plate center line.

Figure 14 shows, from about 50 hertz of 84 decibels of sound pressure level average out to (± 5 decibels) in the frequency range of 15 KHz, described sound pressure level is recording at a distance of 1 meter of front panel for being input as 1 watt, and triangular base represents that a side of the relative excited target of side panel can provide the effective baffle with bigger degree of depth compared with other shape bottoms such as for example rectangles.With the comparison of the bottom of other shapes, above-mentioned effect can increase by 150 hertz of pattern densities to 500 hertz of zones together with the excited target panel is supported simply on all sides.

Below 100 hertz, frequency response has two peak values, and first about 40 hertz peak value is caused by the resonance of basic excitation device, and second about peak value of 70 hertz is the first resonance beam mode of excited target panel.First pattern reaches low and is enough to provide the degree of depth that can experience for bass, also can be set at the fundamental resonance that is lower than acoustic radiator by the fundamental resonance of transducer, extends this bass response effectively.

Therefore, the invention provides a kind of have extensive use and market simply and the loud speaker that easily carries, though, also be suitable for adopting more durable and long-acting or more high performance plate of material to make this loud speaker can understand with reference to describing the present invention such as packaging material such as corrugated boxboard.

Among all embodiment, transducer can be any known suitable exciter or actuator.For the template bending wave acoustic radiator of distribution pattern acoustic radiator pattern, can select transducer position to make it be coupled to resonance bending wave pattern on a rough averagely.Particularly, can select transducer position to make it be coupled to the resonance bending wave pattern of lower frequency on a rough averagely, just, transducer can be to be positioned to have initiatively resonate antinode (anti-node) number and have the positions of less resonance node number on the contrary of more a plurality of vibratilities.

Claims (31)

1. loud speaker, it comprises that a case structure of being made by the plate of material of rigidity light is to define a plurality of panels, wherein: at least one panel forms a template bending wave acoustic radiator and has the electroacoustic vibration transducer that combines with it, make its radiation one voice output when an input signal is applied to described transducer, crooked wave energy is applied to described acoustic radiator, described case structure is a folding, so can a folded flat form store and transport described case structure also when needed uprightly as a loud speaker.

2. loud speaker as claimed in claim 1, wherein said case structure is made by the rigid lightweight material plate of handling through crease, and to wait the crease place to have sufficient flexible and can make folded flat structure dress described for described rigid lightweight material plate.

3. loud speaker as claimed in claim 2, the wherein said crease that waits can allow the crooked wave energy of transmission between panel.

4. as claim 2 or 3 described loud speakers, wherein the described crease between at least two adjacent surface plates comprises the crease of pair of parallel.

5. as the described loud speaker of claim 2 to 4, wherein by described plate of material being provided with groove to form described crease.

6. loud speaker as claimed in claim 5, the wherein said groove that is provided with comprises the described plate of material of partial compression.

7. as the described loud speaker of claim 1 to 6, wherein said case structure is made up of the described lightweight material plate of single-piece.

8. loud speaker as claimed in claim 1, wherein said case structure comprises a plurality of plates, described a plurality of plates are by made with the rigid lightweight material plate that connector connects in described panel edges.

9. loud speaker as claimed in claim 8, wherein said connector comprises hinge.

10. loud speaker as claimed in claim 8 or 9, wherein said connector can allow the crooked wave energy of transmission between plate.

11. as the described loud speaker of claim 2 to 10, wherein said crease or described connector are discontinuous.

12. as the described loud speaker of claim 1 to 11, wherein said case structure is a rescinded angle pyramid.

13. loud speaker as claimed in claim 12, wherein said rescinded angle surface plate is inclination with respect to the surface plate of described pyramid bottom.

14. as the described loud speaker of claim 1 to 13, wherein said acoustic radiator is what resonate.

15. loud speaker as claimed in claim 14, wherein said acoustic radiator belongs to the distribution pattern type.

16. as the described loud speaker of claim 1 to 15, wherein said case structure is open shape.

17. as the described loud speaker of claim 1 to 16, wherein said case structure comprises the ground connection bearing.

18. as the described loud speaker of claim 1 to 17, comprising each vibration transducer of each panel that is attached at described case structure.

19. as the described loud speaker of claim 1 to 18, wherein said case structure belongs to accordion or double spread form.

20. loud speaker as claimed in claim 19, a panel of wherein said case structure is provided with a crease, but makes described panel self folding with folding described case structure.

21. loud speaker as claimed in claim 20, the crease of wherein said panel roughly are positioned at described panel centre, make described panel can be folded in half into half with folding described case structure.

22. as claim 20 or 21 described loud speakers, comprising with described crease disposed adjacent and the plate that becomes one with a panel of described case structure, to extend through described crease folding in a direction to prevent described panel for described plate when described structure is upright.

23. as the described loud speaker of claim 1 to 22, support flap comprising one, described support flap is connected to a panel of described case structure and collapsiblely makes described case structure be kept upright to support at least one adjacent panels.

24. loud speaker as claimed in claim 23, wherein said support flap is suitable for supporting two adjacent panels.

25. as claim 23 or 24 described loud speakers, wherein when described case structure is folding, described support flap is as the distance piece between the inner surface plate of two adjacent surface plates, so that a cavity that is used to take in described transducer to be provided, one of them inner surface plate has and is attached thereto the described transducer that connects.

26. as the described loud speaker of claim 1 to 25, it comprises that at least one dump bolt or other securing members are so that described case structure keeps folded level state.

27. as the described loud speaker of claim 1 to 26, wherein said rigid lightweight material plate is the corrugated boxboard that contains the epidermis plate, described epidermis plate holder is held a corrugation central layer.

28. loud speaker as claimed in claim 27, wherein said case structure define a front panel and an at least one side panel with a bottom, and the configuration of wherein said corrugation central layer can make its corrugation portion and described bottom be vertical extent.

29. loud speaker as claimed in claim 28, wherein said at least one side panel has a bottom, and the described corrugation portion that wherein is arranged at least one side panel is oriented with its bottom and is an acute angle.

30. as the described loud speaker of claim 1 to 29, wherein said transducer is an inertia electric device, described inertia electric device comprises that one is bonded to the coil block and the magnet assemblies of a resilient suspension on described acoustic radiator of described acoustic radiator.

31. loud speaker as claimed in claim 30, wherein said resilient suspension are the form of a support ring, to prevent the non axial action of described magnet assemblies with respect to described coil block.

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