CN1042087C - Loudspeaker system - Google Patents
Loudspeaker system Download PDFInfo
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- CN1042087C CN1042087C CN94190857A CN94190857A CN1042087C CN 1042087 C CN1042087 C CN 1042087C CN 94190857 A CN94190857 A CN 94190857A CN 94190857 A CN94190857 A CN 94190857A CN 1042087 C CN1042087 C CN 1042087C
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- speaker system
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- reflecting plate
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Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/26—Spatial arrangements of separate transducers responsive to two or more frequency ranges
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S1/00—Two-channel systems
- H04S1/002—Non-adaptive circuits, e.g. manually adjustable or static, for enhancing the sound image or the spatial distribution
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R5/00—Stereophonic arrangements
- H04R5/02—Spatial or constructional arrangements of loudspeakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/028—Structural combinations of loudspeakers with built-in power amplifiers, e.g. in the same acoustic enclosure
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2205/00—Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
- H04R2205/026—Single (sub)woofer with two or more satellite loudspeakers for mid- and high-frequency band reproduction driven via the (sub)woofer
Abstract
A speaker system has a first baffle (2) supporting a first speaker unit for producing sounds in a first frequency range (low frequencies), at least one second baffle (27L), (27R) supporting a second speaker unit for producing sounds in a second frequency range which is higher than the first frequency range (middle and/or high frequencies), the second baffles (27L), (27R) being smaller than the first baffles (2). The second baffle (27L), (27R) are spaced a predetermined distance from the first baffle (2). Therefore, the direct sounds radiated directly from the speaker system is increased.
Description
The present invention relates to a kind of speaker system of making the reflecting plate effect that can reduce loud speaker.
Owing to be generally as reflecting plate the front panel of casing, thereby when the oscillating plate of loudspeaker assembly vibrated, the sound wave that carries out playback at the rear of reflecting plate with respect to the direct sound that carries out direct playback from the front of loudspeaker assembly can produce the reflecting plate effect.
Fig. 1 of the speaker system of the represented formation of reference prerequisite of the present invention illustrates this reflecting plate effect.Wherein, the 101st, the casing of formation speaker system, the reflecting plate 102 that constitutes the front panel of this casing 101 is made the square that the length of side is L.Woofer assembly 103 and medium and high pitch loudspeaker assembly 104 are installed on this reflecting plate 102.
The value of one side length L of aforesaid reflecting plate 102 depends on frequency, and with its reflecting plate effect the high frequency in the given frequency is reflected.Be that λ (wavelength) is provided by formula λ=2L.
When L=0.34m was got on one side of above-mentioned reflecting plate 102, because the speed V=340m/sec of sound wave, thereby when λ=2 * 0.34=0.68m, frequency f then was f=v/ λ=340/0.68=500 (Hz).
That is, shown in acoustic pressure-frequency characteristics 105 of Fig. 2, use the reflecting plate of one side length L=0.34m of reflecting plate, the reflected wave of the indirect sound that on the back side of reflecting plate 102, reflects that meeting affix 500Hz is above.
In Fig. 2, the longitudinal axis is that expression acoustic pressure (dB), transverse axis are expression frequencies (Hz).Among Fig. 2, the frequency characteristics of being represented by solid line 105 is that to produce amplitude between crests and trough be situation about 6dB to the frequency characteristics 105 of expression affix from reflecting plate 102 reflection backs, in 500Hz～10KHz scope.Also promptly, not have the area portions of representing with oblique line partly of deduction solid line dotted line 106 parts of reflection fully from expression is to be caused due to the reason that tonequality degenerates by the reflecting plate effect.At the high frequency zone, the frequency band district more than 10KHz for example, owing to there is not the reflecting plate effect, frequency characteristics 105 just becomes flat again.
The purpose of this invention is to provide a kind of reflecting plate effect of the reflecting plate generation of speaker system that makes and reduce, can make the ratio of direct sound increase, can improve the frequency characteristic of intermediate frequency zone by contrast with indirect sound, and can improve the speaker system of tonequality.
According to a kind of speaker system of the present invention, it has the 1st reflecting plate of the 1st loudspeaker assembly that the sound regeneration that makes the 1st frequency band is installed, with the 2nd loudspeaker assembly that the sound regeneration that makes 2nd frequency band higher than the 1st loudspeaker assembly is installed, the 2nd reflecting plate that at least one is littler than the 1st reflecting plate
It is characterized in that: above-mentioned the 2nd reflecting plate is configured on the position of only leaving the 1st reflecting plate predetermined distance;
It also has: arm shape member connects the 1st reflecting plate and the 2nd reflecting plate by above-mentioned arm shape member;
Inside is installed with the housing of above-mentioned the 2nd reflecting plate; One end is contained on the said machine casing, the other end is installed in the arm shape member on the above-mentioned housing; And
The buffer gear that electronic device is installed is being set on said machine casing.
Because speaker system of the present invention is to make leaving with the 1st reflecting plate that is provided with the loudspeaker assembly that bass uses the 2nd reflecting plate with loudspeaker assembly that high pitch and/or middle pitch use is set on the position of predetermined distance, thereby can reduce the reflecting plate effect; With from the indirect sound of the back side playback of reflecting plate by contrast, can make directly from the direct sound of loudspeaker assembly playback increases, and can improve the frequency characteristic of midband, and good acoustic image locating effect can be arranged.
Fig. 1 is the oblique view that constitutes the speaker system of prerequisite of the present invention,
Fig. 2 is the performance plot of the frequency characteristic of expression speaker system shown in Figure 1,
Fig. 3 is the front view of the structure of expression speaker system of the present invention,
Fig. 4 is the end view of the structure of expression speaker system of the present invention,
Fig. 5 is the rearview of structure of the major part of expression speaker system of the present invention,
Fig. 6 is the oblique view of structure of the major part of expression speaker system of the present invention,
Fig. 7 is the sectional drawing of the internal structure of expression loud speaker of the present invention,
Fig. 8 is the top view of the assembly structure of expression the 2nd reflecting plate,
Fig. 9 A～Fig. 9 D is the structure that is illustrated in buffer component used in the speaker system of the present invention, Fig. 9 A is the front view of expression buffer component structure, Fig. 9 B is the end view of expression buffer component structure, Fig. 9 C is a view of seeing buffer component from the inside, and Fig. 9 D is the sectional drawing of seeing along the A-A line among Fig. 9 A.
Figure 10 is an example schematic diagram that is used for illustrating the holding state of the electronic device that is formed by buffer component,
Figure 11 is an example schematic diagram that is used for illustrating the holding state of the electronic device that is formed by buffer component,
Figure 12 is the schematic diagram of the conduit that is used for illustrating that the present invention is used,
Figure 13 is the sectional drawing of the example of other pipes of expression,
Figure 14 is the performance plot of the frequency characteristic of expression speaker system of the present invention,
Figure 15 is the schematic diagram that is used for illustrating the operate condition of speaker system,
Figure 16 is a loop diagram of representing dc power supply circuit used in the speaker system of the present invention,
Figure 17 is the characteristic of the various conduits of expression and the table of tonequality,
Figure 18 is the impedance of the various conduits of expression and the table of tonequality.
Below, explain the structure of speaker system of the present invention with reference to accompanying drawing.
Among Fig. 3～Fig. 5, the 1st, the whole speaker system of this example of expression.Casing 2 is to make as Fig. 4 and the first half 2A that front and back is the semicircle tubular shown in Figure 6 and latter half of 2B is incorporated, the tubular of non-circular cross-section is arranged as illustrated in fig. 6 with synthetic resin.
The hypomere portion 3 of casing 2 forms one with base plate, makes than top little oval tubular, in the front of the first half 2A of the hypomere portion 3 of casing 2, as Fig. 3, Fig. 6 and the rectangular apertures 4 that forms shown in Figure 7.
Earlier with reference to Fig. 3, Fig. 4 and Fig. 6 the first half 2A that constitutes casing 2 is described, the upside in aperture 4 sets the woofer of dressing casing 2 in, is the switch 7 of perverse the level adjustment of bass knob 5, master volume adjusting knob 6 and power connection/cut-out usefulness.
As Fig. 4～shown in Figure 6, form the back side protuberance 8 that assembling input and output binding post is used at the back side of the latter half of 2B that constitutes semicircular cylinder portion.
As shown in Figure 5, this back side protuberance 8 be made into see from the back side roughly rectangular.On the position, the left and right sides, upper end of this rectangular portion 8A, form bight 9L and 9R.As Fig. 6 and shown in Figure 8, these two bight 9L and 9R are offering to see it is rounded hole 10L, 10R from above respectively.
Power supply connecting portion 11 and output wiring terminal (DIN joint) 12L and 12R are being set on the rectangular portion 8A of this back side protuberance 8, and power supply connecting portion 11 is to be used for driving the bass that makes 50～200Hz regeneration that constitutes the 1st reflecting plate with the amplifier of 1 channel part of loudspeaker assembly (bass horn) or drive 2 channels amplifier partly of the high middle pitch loudspeaker assembly of 200Hz～20KHz (mediant trumpet and/or loudspeaker) of following formation the 2nd reflecting plate; And output wiring terminal 12L and 12R are the output wiring terminals that drives the amplifier of mediant trumpet and/or loudspeaker.Here said the 1st reflecting plate is meant the suitable part of sectional area of dissecing casing 2 gained with the face that parallels with paper with Fig. 3.
Also have screws clamp part 14L and 14R, it is to be used for remaining on internal storage freely to rotate and on the housing of loudspeaker assembly connecting base portion 13L and 13R, and this loudspeaker assembly is as mediant trumpet that constitutes following the 2nd reflecting plate and/or loudspeaker.Here, so-called the 2nd reflecting plate and the face that parallels with paper with Fig. 3 dissect internal storage the sectional area of housing of mediant trumpet and/or loudspeaker suitable.
The foursquare recess that roughly is that forms between two bight 9L and 9R also is installed with jointing for 15 li, for example RCA type connector binding post 17L and 17R and receiving carry with or miniaturized electronic devices 30 on direct-current power supply joint 18; The amplifier that the output of portable types such as above-mentioned jointing is to be used for connecting to carry using magnetic recorder/reproducer, the disc recording regenerating unit of CD (Compact Disc) regenerating unit or energy record regenerating or miniaturized electronic devices 30 and casing are 2 li.
In addition, as shown in Figure 4 and Figure 5, be integrally formed into leg 18L and the 18R roughly the same overleaf on the bottom surface of protuberance 8 with the height of hypomere portion 3.
As shown in Figure 3, on the casing 2 of first half 2A and latter half of 2B formation one, the buffer component mounting portion 19 that is made of aluminium dish 19A is being set. Buffer component 21a, 21b, 21c, 21d such as rubber are installed on the quartering position of this aluminium dish 19A, and they are to be inlaid in circular hole 20a, 20b, 20c, the 20d with freely unloading.
At first, constitute the aluminium dish 19A that installs formation buffer component mounting portion 19 on the upper plate 2C that the cross section is elliptoid casing 2 after first half 2A and latter half of 2B integrator, the shape of this aluminium dish 19A is made into the ellipse roughly the same with the plane of casing 2.
From the center of this aluminium dish 19A, for example offer elliptoid circular hole 20a, 20b, 20c, 20d on the predetermined circumference of the quartering.Buffer component 21a shown in Fig. 9 A～9D～21d can be arrived in these circular holes 20a, 20b, 20c, the 20d by free loading, unloading ground setting-in.
Fig. 9 A～9D represents buffer component 21a～21d.Fig. 9 A is the front view of buffer component 21a～21d, and Fig. 9 B is an end view, and Fig. 9 C is a bottom view, and Fig. 9 D is the sectional drawing that the A-A ＇ line along Fig. 9 A obtains.
In the inside of base 21f and along on the predetermined distance of minor axis decentre point O, be provided with that 2 mutual skies shown in Fig. 9 B～9D open certain intervals with casing 2 on the joint portion 21g of the circular hole tabling offered.And with the inside of the opposite side of major axis that forms protuberance 21f, form the thickness of base reduced into the crescent notch 21h of half approximately.
Shown in the plan view of the sectional drawing of Fig. 4 and Figure 10, four above-mentioned buffer component 21a～21d are made under the situation of protuberance 21f in towards outside ground setting-in to circular hole 20a～20d of aluminium dish 19A, just can as place the 1st carry with electronic device 30A be placed with than the device of the bottom surface of shape greatly.If make inwards setting-in of protuberance 21f as illustrated in fig. 11, just can place the 2nd and carry such less device of floor space with electronic device 30B.The formation of the crescent shape notch 21h of buffer component 20a～20d is in order by pushing this part its circular hole 20a～20d that breaks away from aluminium dish 19A easily to be taken out.Not only formation such as available rubber of buffer component can also or constitute the bigger oil of rubber and viscosity with helical spring with mixing.
The roughly internal structure of the casing 2 that above-mentioned first half 2A and latter half of 2B are combined is to form aperture 4 in the lower end of casing 2 as shown in Figure 7, thereby constitutes bass reflex type casing (Bass-Reflex-Cabinet): abbreviate reflecting plate in this example as).
In Fig. 7, the 23rd, reflecting plate is installed with bass horn 22 on this reflecting plate 23.Do not represent though 1 channel amplifier of bass horn 22 usefulness and driving described later are left on 2 figure such as channel amplifier of the loudspeaker assembly in the housing, also be installed in 2 li of casings.
Below, the structure that connects base portion 13L and 13R is described.This connects base portion 13L and 13R is formed by synthetic resin, is made into the cylindric of head globulate.Offering from a side direction of this cylinder head below and circular hole 25L and 25R that opposite side tilts insert the earthing at an end of cylinder head and fixing arm, be i.e. conduit 26L and 26R.In the circular hole 25L ＇ of the opposite side that is connected below circular hole 25L and the 25R and 25R ＇, insert the lead 12L ＇ and the 12R ＇ that draw from amplifier output wiring terminal 12L and 12R, and in conduit 26L and 26R, pass through, and be connected with loudspeaker assembly in the 27R at housing 27L with shown in Figure 4 as mediant trumpet and/or loudspeaker with Fig. 3.
As shown in Figure 5, the cylindric hypomere that connects base portion 13L and 13R is formed stage portion 28L and 28R, and it can freely rotate in the circular hole 10L of bight 9L shown in Figure 8 and 9R and 10R.Brake component 29L and the 29R that is made of Ω shape metalwork etc. is installed in the lower end of this stage portion 28L and 28R.
On the bottom surface of stage portion 28L and 28R, form semicircular shaft insertion hole up, the axle of section semicircular in shape is inserted in this shaft insertion hole, axle is fixed on 31R with Screw 31L to be connected on base portion 13R, the 13L.The front end of axle is made into and can freely rotates with respect to coupling 32L and 32R.Fixing in the lower end of coupling 32L and 32R along longitudinally the both end sides of axle is being whittled into flat fixed axis 33L and 33R, on this fixed axis 33L and 33R, offering through hole, forming shunting tap 34L and 34R.
Have the connection base portion 13L and the 13R of said structure, if fixed axis 33L and 33R are fixed, then comprise the axle that connects base portion 13L and 13R from coupling 32L and the part more than the 32R can along clockwise or counter-clockwise direction freely rotate.
Therefore, if 35 li of the flat fixing holes that forms in the fixed axis 33L of a connection base portion 13L and 13R and circular hole 10L that 33R is inserted into bight 9L shown in Figure 8 and 9R and the 10R, screws clamp part 14L and 14R that screw is formed from the back side of latter half of 2B shown in Figure 5 insert, and with the shunting tap 34L of fixed axis 33L and 33R and 34R tighten combine last, then can comprise the 2nd reflecting plate 27L and 27R and conduit 26L and 26R be connected base portion 13L and 13R installs with respect to casing 2 free to rotately.And can make as long as the screw of screws clamp part 14L and 14R is just unloaded and can the 1st reflecting plate and the 2nd reflecting plate promptly be thrown off housing 27L, 27R and casing 2.Particularly when transportation, if make its words of under the state of throwing off, packing just can make the packing miniaturization.
In addition, in the circular hole 10L and 10R of bight 9L and 9R, form as illustrated in fig. 8 and fasten portion 36, the two ends that make brake component 29L and 29R with fasten fastening of portion 36 and hold 37 and 38 to contact and just can be limited in the angular range of regulation being connected base portion 13L and 13R rotational angle in the horizontal direction.
That is, just can make the 2nd reflecting plate 27L and 27R by connection base portion 13L and 13R clockwise direction CW or counter-clockwise direction CCW are rotated, the horizontal direction along A-A ＇ moves in prescribed limit as illustrated in fig. 3.
Below, conduit 26L and 26R are described, they are to connect the 1st used in speaker system reflecting plate and the 2nd reflecting plate.
Figure 12 be the section obtained along the B-B ＇ line of Fig. 3 to view, conduit 26L and 26R are sneak into carbon fiber in epoxy resin after, form the cylindric conduit of hollow with sintering circuit.As shown in figure 13, can make this conduit 26L and 26R at the through hole 25L and the 25R that are connected base portion 13L and 13R one side bigger, and the mediant trumpet of the 2nd reflecting plate 27L and 27R and/or loudspeaker are made thinner by a hinged side, form taper hollow conduit 51.
To conduit 26L, 26R as the intermediate support of this sound equipment require lighter, hard, internal losses is suitable.That is velocity of sound,
E is that Young's modulus, ρ are density) want fast, Q (sharpness of resonance) is low, and above-mentioned hollow tube of sneaking into carbon fiber and vibration damping copper pipe can fully satisfy these conditions then as shown in figure 17.
The above-mentioned carbon fibre composite of sneaking into carbon fiber can change its intensity and modulus of elasticity according to different method for makings, but generally be carbonization viscose rayon or polyacrylonitrile fibre etc. in inert gas, preferably then carries out graphitization processing.
The material that does not have expression among also available Figure 17, after the processing that outgas such as tungsten filament, be added to and obtain the boracic fragment in the reacting furnace continuously, make these boracic fragments and epoxy resin etc. form tubulose in conjunction with the back, perhaps the Fypro that is made by P-penylene amine and terephalic acid etc. (E.I.Du Pont Company make, trade mark is Kai Pule) mixes with epoxy resin, perhaps glass fibre etc. is mixed formation hollow tube afterwards with epoxy resin.
When the conduit 26L of formation hollow form shown in Figure 12 and 26R are metals such as iron pipe shown in the table 1 li, by be connected each loudspeaker assembly and drive lead 12L ＇ between the loop and 12R ＇ on the magnetic flux 63 that produces of the electric current that flow through make and induce induced current in the metal catheter, produced and flow through the such magnetic field that forms by the electromagnetic induction effect of inverse current in like lead 12L ＇ and the 12R ＇, its influence outputs to the electric current of loudspeaker assembly, just the problem that tonequality is degenerated is arranged.Therewith relatively, the hollow conduit that uses the conduit that is mixed into carbon fiber or Kai Pule conduit etc. to have the resistance of regulation as this embodiment just can be eliminated the reason that tonequality is degenerated that is formed by above-mentioned electromagnetic induction.Figure 18 represents the quality of tonequality of the resistance of this conduit.
In Figure 17 and Figure 18, lead from conduit 26L, 26R by the time tonequality, that " zero " expression is good, △ represents is good slightly, * be that expression is bad.
Wherein, the length of conduit 26L and 26R is selected as follows.That is, when the length of conduit 26L, 26R is too short, the three-dimensional phonoreception of sound because housing 27L, 27R near casing 2, not only can not obtain regenerating, and can interfere with housing 27L, 27R from the sound of bass horn 22 outputs of leaving 2 li of casings in.In addition, when the length of conduit 26L, 26R is long,, can not obtain three-dimensional phonoreception because the distance between housing 27L and housing 27R is too left.Therefore, the distance that the length of pipeline 26L and 26R is chosen to obtain good three-dimensional phonoreception when the audience listens the regeneration sound that speaker system transmits and the regeneration sound that produces from bass horn and housing 27L, 27R can not interfere gets final product.
Below, the housing 27L and the 27R of the front end that is installed in above-mentioned conduit 26L and 26R are described. Housing 27L and 27R are that the diameter of phi of making major axis is that seeing from the front about 100mm is oval sphere, in this spherical housing 27L and 27R height, middle pitch loudspeaker assembly are installed.In Fig. 4, housing 27L and 27R are to be the front end that the center is installed in conduit 26L and 26R rotationally to face side or from the inboard ground of surface lateral, with axle 41L and 41R from the inboard of paper.Therefore in Fig. 3, housing 27L and 27R can be the action of shaking the head of center, along continuous straight runs with conduit 26L and 26R.On housing 27L and 27R, constituting the speaker system of not representing on the figure of mediant trumpet and/or loudspeaker is to be installed on the installation board that forms respectively among housing 27L and 27R from front one side.The mesh-like protection member of the playback face of protection loudspeaker is installed in the front of housing 27L and 27R one side.As mentioned above, so-called the 2nd reflecting plate is meant the basal area that face that using of housing 27L, 27R parallels with paper among Fig. 3 dissects.
When use has the loudspeaker of the present invention of said structure, because the diameter of phi of the major axis of inner housing 27L that medium and high pitch loudspeaker spare is housed and 27R is 100mm approximately, thereby L=0.1m, said similar with Fig. 1, under the present embodiment situation, wavelength X then is λ=2L=2 * 0.1=0.2m, so frequency f is v/ λ=340/0.2=1700 (Hz).
Therefore, as above saidly the 1st with after the 2nd reflecting plate separates, with same in the past, the 1st reflecting plate, when promptly one side length L of the section of casing 2 being got into L=0.34m, if compare, the 2nd reflecting plate with this 1st reflecting plate 2, promptly the length L of the major axis of the section of housing 27L and 27R is dwindled into L=0.1m, then directly sound and indirectly sound (reflected wave) add together frequency characteristics 105a just as shown in Figure 14.With speaker system of the present invention compared to Figure 1 the direct sound and the area of the oblique line part of the difference of indirect sound are narrowed down to below half.Promptly can reduce the reflected wave of the indirect sound that constitutes the reason that tonequality degenerates, reduce the reflecting plate effect, can carry out real quality sound reproduction.Get under the 0.34m situation at above-mentioned L,, also can obtain effect of sufficient even the L of the 2nd reflecting plate is got into 0.2m, roughly becomes about 2 times the 1st reflecting plate.
Again owing to the 1st and the 2nd reflecting plate is integral, thereby compare, can make area is set dwindles 1/4 with small-sized Dizzy Jazz Big Band etc. by conduit.
Figure 15 is the top plan view of the speaker system of present embodiment.As shown in figure 15, by the hearer 50 who is positioned at the speaker system front housing 27L is rotated along counter-clockwise direction CCW with respect to connecting base portion 13L and conduit 26L, simultaneously housing 27R with respect to connect base portion 13R and conduit 26R along clockwise direction CW rotate, thus they are moved on close hearer's 50 the position of ear.For example make the 2nd reflecting plate 27L on both sides and 27R from the distance of ear near 25cm.General when the beeline from hearer 50 to medium and high pitch loudspeaker is 1m, just form 20log100/25=12dB in the present embodiment; If the volume that loudspeaker forms is thought identical, then can hear the sound that 12dB is big.On the contrary, if identical volume owing to can only dwindle the volume of 12dB in the present embodiment, thereby can reduce it and outwards drag leakage (noise) volume.
Figure 16 is the loop diagram that expression is contained in the dc power supply circuit that the amplifiers in the said machine casing 2 use.Wherein 51 be from the plug that the power supply connecting portion 11 on the back side protuberance 8 is drawn that is arranged on shown in Figure 5, be connected on the source power supply, commercial voltage is added to the primary side T of amplifier with power transformer T
1On.In this example, 2 winding T that amplifier is used are being set on the power transformer T
3With another 2 winding T to direct-current power supply joint 18 power supplies of back side protuberance 8
2From these 2 winding T
2And T
32 voltages of output are by rectifying block 52,53 and smoothed filter circuit 54,55, supply with direct-current power supply joint 18 after being transformed into the direct voltage of 4.5v for example, and supply with amplifier circuit after being transformed into the 9v direct voltage.
Even on transformer T, do not reel to 2 winding T of direct-current power supply joint 18 power supply usefulness
2, also can be shown in dotted line, the 9v direct voltage of supplying with amplifier circuits is carried out obtaining after the DC-DC conversion direct voltage of 4.5v with DC-DC transducer 56.Pair amplifier is by battery-driven in addition, and also available DC-DC transducer 56 is supplied with direct-current power supply joint 18 to this cell voltage.
List connects to the DC input adapter supply power ground that carries with electronic device 30,30A, 30B from such direct-current power supply joint 18, with use member such as AC adapter after resupply the DC power supply of electronic device 30,30A, 30B situation compare, can focus on connecting line aptly the inboard of casing 2.Certainly, still will connect output and binding post 17L and the 17R that carries with electronic device 30,30A, 30B with connecting line under this occasion, the latter is connected with amplifier in the casing 2.
Should be clear, though above-mentioned explanation to speaker system of the present invention is at situation about buffer component being installed on the casing of only depositing bass horn, also can be on general loudspeaker enclosure its device.
Above-mentioned speaker system is to make bass horn is contained in structure in the casing, but owing to be the sound of the frequency content of bass zone by the sound of bass horn regeneration, does not have directive property.Therefore,, need not be configured in bass horn the middle position of a pair of mediant trumpet and/or loudspeaker as ground as described in the above-mentioned embodiment, configurable arbitrarily on one side mediant trumpet and/or loudspeaker below just passable.
When adopting speaker system of the present invention, owing to make the 2nd reflecting plate littler, and it is configured on the position of separating with the 1st reflecting plate, thereby can reduces the reflecting plate effect, can obtain the speaker system that tonequality has improved than the 1st reflecting plate.
Owing to the 1st reflecting plate and the 2nd reflecting plate are separated, make them integrated again again, thereby can obtain making and area is set than little a lot of effects such as combos by conduit.
Symbol and item list
The symbol item
1 ... speaker system
2 ... casing (the 1st baffle plate)
2A ... first half
2B ... latter half of
3 ... hypomere section
4 ... the aperture
5 ... level is adjusted knob
6 ... the master volume adjusting knob
7 ... power switch
8 ... back side protuberance
8A ... rectangular portion
9L ... the bight
9R ... the bight
10L ... the hole
10R ... the hole
11 ... the power supply connecting portion
12L ... the amplifier output wiring terminal
12R ... the amplifier output wiring terminal
12L ＇ ... lead
12R ＇ ... lead
13L ... connect base portion
13R ... connect base portion
14L ... the screws clamp part
14R ... the screws clamp part
15 ... recess
17L ... connector binding post (jointing)
17R ... connector binding post (jointing)
18 ... the direct-current power supply joint
18L ... leg
18R ... leg
19 ... the buffer component mounting portion
19A ... the aluminium dish
20a～20d ... circular hole
21a～21d ... buffer component
21e ... base
21f ... jut
21g ... the joint portion
21h ... notch
22 ... bass horn
23 ... baffle plate
25L ... circular hole
25R ... circular hole
25L ＇ ... circular hole
25R ＇ ... circular hole
26L ... conduit
26R ... conduit
27L ... housing (the 2nd baffle plate)
27R ... housing (the 2nd baffle plate)
28L ... stage portion
28R ... stage portion
29L ... brake component
29R ... brake component
30 ... carry and use electronic device
30A ... the 1st carries and uses electronic device
30B ... the 2nd carries and uses electronic device
31L ... Screw
31R ... Screw
32L ... coupling
32R ... coupling
33L ... fixed axis
33R ... fixed axis
34L ... shunting tap
34R ... shunting tap
35 ... fixing hole
36 ... fasten portion
37 ... fasten end
38 ... fasten end
40R ... housing
41R ... axle
50 ... the hearer
51 ... plug
52 ... rectifying block
53 ... rectifying block
54 ... smoothed filter circuit
55 ... smoothed filter circuit
56 ... the DC-DC transducer
61 ... the taper hollow conduit
63 ... magnetic flux
Claims (14)
1. speaker system, it has the 1st reflecting plate of the 1st loudspeaker assembly that the sound regeneration that makes the 1st frequency band is installed, with the 2nd loudspeaker assembly that the sound regeneration that makes 2nd frequency band higher than the 1st loudspeaker assembly is installed, the 2nd reflecting plate that at least one is littler than the 1st reflecting plate
It is characterized in that: above-mentioned the 2nd reflecting plate is configured on the position of only leaving the 1st reflecting plate predetermined distance;
It also has: arm shape member connects the 1st reflecting plate and the 2nd reflecting plate by above-mentioned arm shape member;
Inside is installed with the housing of above-mentioned the 2nd reflecting plate; One end is contained on the said machine casing, the other end is installed in the arm shape member on the above-mentioned housing; And
Upper part in said machine casing is being provided with the buffer gear that electronic device is installed.
2. speaker system as claimed in claim 1 is characterized in that, above-mentioned arm shape member is to be that 5000m/sec is above, the resonance sharpness is the material formation 500 below with velocity of sound.
3. speaker system as claimed in claim 2 is characterized in that, above-mentioned arm shape member is to be formed by the material of having sneaked into carbon fiber.
4. speaker system as claimed in claim 1 is characterized in that, it also have the casing of adorning the 1st reflecting plate in inside with the cavity of above-mentioned the 1st loudspeaker assembly rear side and the outside conduit that is connected.
5. speaker system as claimed in claim 1 is characterized in that, above-mentioned arm shape member be with velocity of sound be that 5000m/sec is above, the resonance sharpness is that material below 500 is made hollow form.
6. speaker system as claimed in claim 5 is characterized in that, above-mentioned arm shape member is to form with the material of having sneaked into carbon fiber.
7. speaker system as claimed in claim 1 is characterized in that, it also has between above-mentioned arm shape member and casing, the 1st rotational support portion that above-mentioned arm shape member can be supported freely to rotate with respect to casing; And between above-mentioned arm shape member and housing, the 2nd rotational support portion that above-mentioned housing can be supported freely to rotate with respect to arm shape member.
8. speaker system as claimed in claim 1 is characterized in that above-mentioned buffer gear is made of a plurality of buffer components, and the support section of the support electronic device of above-mentioned buffer component is to form on the eccentric position at the center of departing from buffer component.
9. speaker system as claimed in claim 1, it is characterized in that, above-mentioned arm shape member is made into hollow, and the driving loop that drives the 1st and the 2nd loudspeaker assembly is being set in said machine casing, by the holding wire that is provided in the above-mentioned arm shape member said driving circuit is being connected with the 2nd loudspeaker assembly.
10. speaker system as claimed in claim 1 is characterized in that, the direct voltage output wiring terminal is being set on above-mentioned casing.
11. speaker system as claimed in claim 1 is characterized in that, the part of the direct voltage of supplying with said driving circuit is carried out voltage control and supply with above-mentioned direct voltage to binding post.
12. speaker system as claimed in claim 11 is characterized in that, above-mentioned arm shape member is to be that 5000m/sec sharpness above, resonance is the material formation 500 below with velocity of sound.
13. speaker system as claimed in claim 12 is characterized in that, above-mentioned arm shape member is to form with the material of having sneaked into carbon fiber.
14. speaker system as claimed in claim 13 is characterized in that, it also has between above-mentioned arm shape member and casing, the 1st rotational support portion that above-mentioned arm shape member can be supported freely to rotate with respect to casing; And the 2nd rotational support portion that between above-mentioned arm shape member and housing, with above-mentioned housing, can support freely to rotate with respect to arm shape member.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24714193A JP3371161B2 (en) | 1993-10-01 | 1993-10-01 | Speaker system |
| JP247141/93 | 1993-10-01 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1116035A CN1116035A (en) | 1996-01-31 |
| CN1042087C true CN1042087C (en) | 1999-02-10 |
Family
ID=17159046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94190857A Expired - Fee Related CN1042087C (en) | 1993-10-01 | 1994-10-03 | Loudspeaker system |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3371161B2 (en) |
| KR (1) | KR100355481B1 (en) |
| CN (1) | CN1042087C (en) |
| WO (1) | WO1995010163A1 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10200983A (en) * | 1997-01-09 | 1998-07-31 | Sony Corp | Speaker equipment |
| WO2006097857A1 (en) * | 2005-03-17 | 2006-09-21 | Pss Belgium N.V. | A multiple loudspeaker device |
| KR101231664B1 (en) * | 2011-08-26 | 2013-02-14 | 조윤상 | Speaker capable of regulating the degree of rotation |
| CN106792292B (en) * | 2016-12-29 | 2023-04-07 | 汉得利（常州）电子股份有限公司 | Low frequency loudspeaker shell device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011588U (en) * | 1983-06-30 | 1985-01-26 | 富士通テン株式会社 | speaker device |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS581019Y2 (en) * | 1978-09-08 | 1983-01-08 | オンキヨー株式会社 | Bass speaker system |
| JPS57141486U (en) * | 1981-02-27 | 1982-09-04 | ||
| JPS57152295A (en) * | 1981-03-16 | 1982-09-20 | Trio Kenwood Corp | Bass-reflex type speaker system |
| JPH0339994Y2 (en) * | 1985-11-15 | 1991-08-22 | ||
| JPS6481499A (en) * | 1987-09-22 | 1989-03-27 | Seiji Yoshioka | Speaker system |
| JPS6454494U (en) * | 1987-09-30 | 1989-04-04 |
-
1993
- 1993-10-01 JP JP24714193A patent/JP3371161B2/en not_active Expired - Fee Related
-
1994
- 1994-10-03 KR KR1019950702201A patent/KR100355481B1/en not_active IP Right Cessation
- 1994-10-03 CN CN94190857A patent/CN1042087C/en not_active Expired - Fee Related
- 1994-10-03 WO PCT/JP1994/001649 patent/WO1995010163A1/en active Application Filing
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6011588U (en) * | 1983-06-30 | 1985-01-26 | 富士通テン株式会社 | speaker device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO1995010163A1 (en) | 1995-04-13 |
| CN1116035A (en) | 1996-01-31 |
| JP3371161B2 (en) | 2003-01-27 |
| JPH07107585A (en) | 1995-04-21 |
| KR950704924A (en) | 1995-11-20 |
| KR100355481B1 (en) | 2002-12-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 19990210 Termination date: 20121003 |