CN1123277C - Loudspeaker unit - Google Patents
Loudspeaker unit Download PDFInfo
- Publication number
- CN1123277C CN1123277C CN 97192332 CN97192332A CN1123277C CN 1123277 C CN1123277 C CN 1123277C CN 97192332 CN97192332 CN 97192332 CN 97192332 A CN97192332 A CN 97192332A CN 1123277 C CN1123277 C CN 1123277C
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- China
- Prior art keywords
- damper
- voice coil
- loudspeaker unit
- vibrating membrane
- movable end
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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
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
Abstract
A loudspeaker unit which can reproduce high-level sounds while having a thin structure. The loudspeaker unit is constituted in such a way that a damper (5) is positioned inside the magnetic gap (1d) of a field section, the free end (5a) of the damper (5) is fitted to a diaphragm (7) fitted to the top section of a voice coil bobbin (3a), and the coil (3) is held in the magnetic gap (1d) by means of the damper (5) through the diaphragm (7). The hole formed of the internal surfaces of a plate (1c) and a magnet (1a) is used as the space (1e) in which the damper (5) can move. Therefore, the thickness of the speaker unit can be reduced, because there is no need of the spacial allowance for the downward displacement of the damper above the field section. In addition, the horizontal deflection of the lower end section of the coil becomes smaller and the lower end section is prevented from coming into contact with the field section even when rolling occurs, because the distance from the damper to the lower end section of the coil becomes shorter. Therefore, the unit can reproduce high-level sounds.
Description
Technical field
The present invention relates to the loudspeaker unit not only realizing slimming but also can reproduce big acoustic pressure.
Background technology
Past requires, saves the space for the wall built-up that adapts to loudspeaker unit and increases ornamentally, require to realize that the cry of its slimming is a lot of.Be devoted to the slimming of loudspeaker unit for this reason always.Below in conjunction with the traditional loudspeaker unit of seeking slimming of description of drawings.
As traditional loudspeaker unit of seeking slimming, known to have a kind of be that heavy caliber voice coil loudspeaker voice coil and plane vibrating membrane are combined, and also has a kind of disclosed as Japanese Utility Model bulletin communique 1981-45278 Fig. 1.
Figure 13 is the structure chart of the former loudspeaker unit, and Figure 14 is the structure chart of the latter's loudspeaker unit.
In Figure 13, realize that in order to make loudspeaker unit slimming, vibrating membrane 127 are not pyramid types but plane for such vibrating membrane acquisition good frequency characteristic, is made bigbore to voice coil loudspeaker voice coil 123.
Owing to use bigbore voice coil loudspeaker voice coil for excitatory 121, so become the excitatory portion of internal magnetic type that constitutes by magnet 121a, yoke 121b and plate 121c.
The peripheral part of damper 125 is fixed on the framework 122, and its movable end 125a is installed in the outer peripheral face of voice coil loudspeaker voice coil reel 123a.And voice coil loudspeaker voice coil 123 is bearing in the middle of the magnetic gap 121d.Voice coil leads 123b pulls out and is connected with terminal board 124 from voice coil loudspeaker voice coil reel 123a.
Vibrating membrane 127 is installed in the top of voice coil loudspeaker voice coil reel 123a, with edge 126 its peripheries of supporting that are installed on the framework 122.
In Figure 14, the interior perimembranous of damper 135 is fixed on the damper fixed station 131f that is installed on excitatory 131, and the movable end 135a of its periphery is installed on the inner peripheral surface of voice coil loudspeaker voice coil reel 133a.Other structures then loudspeaker unit with Figure 13 are identical.
Adopt said structure, because of not using dark conical vibrating membrane, so only the vibrating membrane attenuation just can make the loudspeaker unit slimming.
Yet there are 2 big problems in above-mentioned traditional structure, and one has enough amplitudes as guaranteeing vibrating membrane, just too slimming, its two, when vibrational system is waved (rolling), unusual sound takes place easily, so can not reproduce big acoustic pressure.
Produce the reason of above-mentioned 2 big problems below in conjunction with the traditional loudspeaker unit of seeking slimming of description of drawings.At first the 1st problem is described in conjunction with Figure 15.
The structure of the loudspeaker unit of Figure 15 and shown in Figure 13 identical.H1 is the thickness of yoke 141b, H2 be from the bottom of voice coil loudspeaker voice coil 143 to the distance of yoke 141b, H3 is the size that the voice coil loudspeaker voice coil bottom exceeds plate 141c, H4 is the thickness of plate 141c, H5 is the distance from excitatory 141 upper wall surface to damper 145 lower wall surfaces, and H6 is the height of damper 145.H7+ α is the distance from damper 145 upper wall surfaces to vibrating membrane 147 back sides, and α is the amplitude headroom of touching damper 145 or used for oscillation when avoiding voice coil leads 143b resonance, is generally 2～3mm.H8 is to the distance of framework 142 upper surfaces from the back side of vibrating membrane 147.
When the one-sided peak swing value of establishing vibrating membrane is X, must make H2=X, H5=X, H7=X.The overall height HT=H1+H2+H3+H4+H5+H6+H7+ α+H8 of loudspeaker unit, then according to above-mentioned requirements, HT=H1+X+H3+H4+X+H6+X+ α+H8=3X+H1+H3+H4+H6+ α+H8.
That is, no matter how little H1, H3, H4, H6, α, H8 be, and the space that one-sided peak swing value is 3 times is indispensable, as guaranteeing enough amplitudes, just can not realize the slimming of loudspeaker unit.
Therefore and slimming slightly even conventional loudspeakers unit shown in Figure 14, although it need not the α size, can, but still have same problem.
Below in conjunction with Figure 16 the 2nd problem is described.The structure of the loudspeaker unit of Figure 16 is also with shown in Figure 13 identical.
S is the central point of vibrational system (general name of the part that voice coil loudspeaker voice coil and vibrating membrane etc. vibrate) when waving, and is the static height position of damper movable end 155a.L1 is the installed surface position on vibrating membrane 157 from edge 156, is the distance of the surface of vibrating membrane 157 to swing center point S, and L2 is to the distance of swing center point S from the bottom of voice coil loudspeaker voice coil 153.
Here establish vibrational system and wave, and the swing in the horizontal direction of vibrating membrane 157 surfaces is of a size of A, then the horizontal direction of voice coil loudspeaker voice coil 153 lower end swing size B is, B=A * (L2/L1).The relative L1 of L2 is big more, and is (L2/L1) big more, and B is big more, so voice coil loudspeaker voice coil 153 can contact with plate 151c with yoke 151b, is easy to generate unusual sound.
In traditional loudspeaker unit of seeking slimming, for the vibrating membrane slimming, to compare its L1 less with the ventional loudspeakers unit that uses dark conical diaphragm, so (L2/L1) loudspeaker unit than common is big.Thereby compare with common loudspeaker unit, when waving the swing of voice coil loudspeaker voice coil bottom bigger, so unusual sound takes place easily.This problem exists on conventional loudspeakers shown in Figure 14 too.
Disclosure of an invention
The objective of the invention is to solve the problem of above-mentioned conventional art, provide and not only can guarantee enough amplitudes but also can further realize slimming and not wave the loudspeaker unit that big acoustic pressure takes place, can reproduce the unusual sound that causes.
To achieve these goals, loudspeaker unit of the present invention has: be arranged on than the damper of excitatory magnetic gap more inner Monday of side and the excitatory portion that is provided with described damper amplitude movable area space below described damper, the movable end that vibrational system position except the voice coil loudspeaker voice coil reel that is positioned at vertical direction in described excitatory magnetic gap is installed in described damper is with the supporting vibrational system, and the damper of mounting support vibrational system not on the described voice coil loudspeaker voice coil reel.
When adopting said structure, can be not be provided with above the excitatory portion damper movable end below displacement amplitude space, so compare, can in the scope of guaranteeing one-sided peak swing value, realize slimming with conventional art.
In addition, owing to shortened distance significantly,, can prevent that it from contacting with excitatory and produce unusual sound, can reproduce big acoustic pressure so even wave, the horizontal direction of voice coil loudspeaker voice coil bottom is swung also less from the swing center point to the voice coil loudspeaker voice coil bottom.
The simple declaration of accompanying drawing
Fig. 1 is the structure chart of the loudspeaker unit of the present invention the 1st embodiment.
Fig. 2 is the 1st effect and the key diagram of effect of the loudspeaker unit of the present invention the 1st embodiment.
Fig. 3 is the 2nd effect and the key diagram of effect of the loudspeaker unit of the present invention the 1st embodiment.
Fig. 4 is the structure chart of the loudspeaker unit of the present invention the 2nd embodiment.
Fig. 5 is the structure chart of the loudspeaker unit of the present invention the 3rd embodiment.
Fig. 6 is the structure chart of the loudspeaker unit of the present invention the 4th embodiment.
Fig. 7 is the structure chart of the loudspeaker unit of the present invention the 5th embodiment.
Fig. 8 is the structure chart of the loudspeaker unit of the present invention the 6th embodiment.
Fig. 9 is the structure chart of the loudspeaker unit of the present invention the 7th embodiment.
Figure 10 is the structure chart of the loudspeaker unit of the present invention the 8th embodiment.
Figure 11 is the structure chart of the loudspeaker unit of the present invention the 9th embodiment.
Figure 12 is the structure chart of the loudspeaker unit of the present invention the 10th embodiment.
Figure 13 is the structure chart of conventional loudspeakers unit.
Figure 14 is the structure chart of conventional loudspeakers unit.
Figure 15 is the key diagram of the 1st problem of conventional loudspeakers unit.
Figure 16 is the key diagram of the 2nd problem of conventional loudspeakers unit.
The optimal morphology that carries out an invention
(embodiment 1)
Below in conjunction with the description of drawings embodiments of the invention.Fig. 1 is the structure chart of the loudspeaker unit of the present invention the 1st embodiment.In Fig. 1, the bore of loudspeaker unit is 12cm.The 1st, the excitatory portion of internal magnetic type.1a is a magnet, external diameter 55mm, and internal diameter 26mm, thickness 9mm, material are ferrite.1b is a yoke, and thickness 2mm, material are iron.1c is a plate, external diameter 60mm, and internal diameter 30mm, thickness 4mm, material are iron.1d is a magnetic gap, internal diameter 60mm, external diameter 64mm.
1e is damper amplitude movable area space, serves as this space with the interior perimembranous hole of plate 1c and magnet 1a.
The 2nd, framework, material are the iron plates of thickness 0.6mm.The 3rd, voice coil loudspeaker voice coil, maximum outside diameter 63.4mm.3a is the voice coil loudspeaker voice coil reel, and internal diameter 60.6mm, material are the aluminium of thickness 0.075mm.3b is a voice coil leads (another name; The silk colo(u)r streak).
The 4th, terminal board.The 5th, damper, the diameter of anchor portion are 30mm, and the height of ripple is a cotton for the 2mm material.5a is the movable end of damper.The 6th, edge, material are the polyurathamc of thickness 0.7mm.The 7th, the vibrating membrane of plane, diameter 80mm, thickness 2mm, material are plastics.The external diameter of the central portion projection of vibrating membrane 7 is 10mm, and internal diameter is 6mm, highly is 10mm.
The peripheral end of damper 5 is fixed on the plate 1c, and its movable end 5a is installed on the central portion projection of vibrating membrane 7.Vibrating membrane 7 is installed in the top of voice coil loudspeaker voice coil reel 3a, and voice coil loudspeaker voice coil 3 is through vibrating membranes 7 and damped device 5 is bearing among the magnetic gap 1d.
In other words, different fully with traditional loudspeaker unit, on the voice coil loudspeaker voice coil reel 3a that in excitatory magnetic gap, is not positioned at vertical direction damper being installed.
3a pulls out voice coil leads 3b from the voice coil loudspeaker voice coil reel, and it is connected with terminal board 4.The edge 6 that vibrating membrane 7 is installed on the framework 2 is supporting its periphery.
The effect and the effect of loudspeaker unit of the present embodiment of said structure is described below in conjunction with Fig. 2 and Fig. 3.
The 1st effect and effect of the loudspeaker unit of present embodiment at first is described, i.e. the effect of slimming and effect.Fig. 2 is the 1st effect and the key diagram of effect of the loudspeaker unit of present embodiment.The loadspeaker structure of Fig. 2 and shown in Figure 1 identical.
In Fig. 2, H1 is the thickness of yoke 11b, H1=2mm.H2 is to the distance of yoke 11b, H2=8mm from the bottom of voice coil loudspeaker voice coil 13.H3 is the size that the voice coil loudspeaker voice coil bottom exceeds plate 11c, H3=1mm.H4 is the thickness of plate 11c, H4=4mm.
H6 is the height of damper 15, H6=2mm.H7 is the distance from the upper wall surface of damper 15 to vibrating membrane 17 back sides, H7=8mm.H8 is to the distance of the upper surface of framework 12, H8=3mm from the back side of vibrating membrane 17.H9 is the distance from excitatory 11 upper wall surface to vibrating membrane 17 back sides, H9=10mm.
If the one-sided peak swing value of vibrating membrane is X, X=8mm then, H2=X=8mm, H7=X=8mm, H7+ α=X+ α=10mm.α is for avoiding voice coil leads 13b when resonance to contact the amplitude headroom of establishing, α=2mm with vibrating membrane 17 with excitatory 11.
The overall height HT of loudspeaker unit is, HT=H1+H2+H3+H4+H7+ α+H8 when HT=H1+H2+H3+H4+H6+H7+H8 during H6 〉=α, H6≤α.(H6=α in the present embodiment is so two HT are identical value)
Because H2=X, H7=X, thus HT=H1+X+H3+H4+H6+X+H8=2X+H1+H3+H4+H6+H8 during H6 〉=α, HT=H1+X+H3+H4+X+ α+H8=2X+H1+H3+H4+ α+H8 during H6≤α.H6=α in the present embodiment is so two HT are identical value.
That is, be that HT=3X+H1+H3+H4+H6+ α+H8 compares with the overall height of the conventional loudspeakers unit shown in Fig. 15, when H6 〉=α, HT can be than original attenuate (3X+H1+H3+H4+H6+ α+H8)-(2X+H1+H3+H4+H6+H8)=X+ α.Perhaps when H6≤α, HT can be than original attenuate (3X+H 1+H3+H4+H6+ α+H8)-(2X+H1+H3+H4+ α+H8)=X+H6.H6=α in the present embodiment is so both are identical value.
In other words and since at least can be not be provided with above the excitatory portion damper movable end below displacement amplitude space, so with compared originally, can in the scope of guaranteeing one-sided peak swing value, realize slimming at least.
If conditions such as excitatory size and vibrating membrane thickness of slab are all taken into account, with the overall height of numeric ratio than the present invention and conventional loudspeakers unit, then when one-sided peak swing value is 8mm, the overall height of conventional loudspeakers unit shown in Figure 15 is 38mm at least, and the overall height of loudspeaker unit of the present invention has only 28mm.
Below the 2nd effect of loudspeaker unit of explanation present embodiment and effect, promptly prevent effect and the effect that unusual sound takes place.Fig. 3 is the 2nd effect and the key diagram of effect of the loudspeaker unit of present embodiment.The structure of the loudspeaker unit of Fig. 3 is also with shown in Figure 1 identical.
In Fig. 3, S is the central point of vibrational system (general name of the part that voice coil loudspeaker voice coil and vibrating membrane etc. vibrate) when waving, and is the static height position of damper movable end 25a.L1 is the installed surface position on vibrating membrane 27 from edge 26, is the distance of the surface of vibrating membrane 27 to swing center point S, L1=12mm (in Fig. 2, being equivalent to H6+H7+ vibrating membrane thickness 2mm).
L2 is to the distance of swing center point S, L2=5mm (in Fig. 2, being equivalent to H3+H4) from the bottom of voice coil loudspeaker voice coil 23.
Here suppose that vibrational system waves, and the swing of the horizontal direction on vibrating membrane 27 surfaces is of a size of A, then the horizontal direction of voice coil loudspeaker voice coil 23 lower end swing size B is, B=A * (L2/L1).
Because the L2 value is less, roughly be equivalent to the gauge of plate 21c, so value (L2/L1) is less.In the occasion of present embodiment, (L2/L1)=0.42, B=A * 0.42.
Compare with conventional loudspeakers unit shown in Figure 16.In this traditional loudspeaker unit, L=14mm (in Figure 15, being equivalent to H3+H4+H5), (L2/L1)=0.93, B=A * 0.93.
In other words, the voice coil loudspeaker voice coil bottom swing in the horizontal direction of the loudspeaker unit of present embodiment narrows down to below half of conventional loudspeakers unit significantly, even thereby wave, and vibrating membrane is swung in the horizontal direction, the swing in the horizontal direction of voice coil loudspeaker voice coil bottom is also less, can not resemble to produce unusual sound because of the voice coil loudspeaker voice coil bottom contacts with excitatory the conventional loudspeakers unit.
As mentioned above, present embodiment can be not be provided with above the excitatory portion damper movable end below displacement amplitude space, so with compared originally at least and can in the scope of guaranteeing one-sided peak swing value, realize slimming.In addition owing to dwindled distance significantly from the swing center point to the voice coil loudspeaker voice coil bottom, so even wave, the swing in the horizontal direction of voice coil loudspeaker voice coil bottom is also less, can avoids it to contact and produce unusual sound with excitatory, can reproduce big acoustic pressure.
In addition, in the present embodiment,, serve as with perimembranous hole in perimembranous hole in the plate and the magnet, and, make and also serve as this space here, then also can adapt to bigger amplitude if establish the hole in the yoke bottom surface as damper amplitude movable area space.According to different occasions, also can only serve as this space in addition with the interior perimembranous hole of plate.
In addition, present embodiment is to be provided with at central portion the damper movable end is installed on the protruding one-piece type vibrating membrane, certainly also can be for example between vibrating membrane and the damper movable end tubular structure thing etc. being set, so that vibrating membrane central portion and damper movable end are installed indirectly.
In addition, present embodiment is that damper is installed on the plate, can certainly be installed in the interior perimembranous of upper wall surface of magnet etc.Can also be on plate pasting pad sheet etc., damper is installed on spacer block again.What present embodiment used in addition is the flat damper that the damper peripheral part does not have elevated portion, can certainly use the damper of elevated portion.
Also have, present embodiment is the damper of mounting support vibrational system on the voice coil loudspeaker voice coil reel not, prevents that dust from entering the catch net of the damper shape of using in the magnetic gap (it is not to be used to support vibrational system) but also can install on the voice coil loudspeaker voice coil reel.
In addition, also can when the assembling loudspeaker unit, the auxiliary damper of temporary support voice coil loudspeaker voice coil reel be installed, and after assembling finishes, remove this auxiliary damper.
In addition, self-evident, the invention is not restricted to the embodiments described.
(embodiment 2)
Fig. 4 is the structure chart of the loudspeaker unit of the present invention the 2nd embodiment.The loudspeaker unit of present embodiment except vibrating membrane 37, all the other structures and the 1st embodiment are identical, the Therefore, omited is to their explanation.
The vibrating membrane 37 of present embodiment is done coning, and is provided with and fitting portion 37a that voice coil loudspeaker voice coil reel 33a uses is installed and the central part of vibrating membrane 37 is installed on the damper movable end 35a.The diameter of vibrating membrane 37 is 80mm, and overall height 11mm, material are the paper of thickness 0.8mm.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st embodiment are identical.
Present embodiment can use common materials such as paper as diaphragm material by vibrating membrane 37 is done coning in addition, can reduce the cost of vibrating membrane.By fitting portion 37a is set, can improve the output of loudspeaker unit in addition.
Self-evident, the invention is not restricted to the foregoing description.
(embodiment 3)
Fig. 5 is the structure chart of the loudspeaker unit of the present invention the 3rd embodiment.Excitatory 41 of the loudspeaker unit of present embodiment, the structure of framework 42, voice coil loudspeaker voice coil 43, edge 46, terminal board 44 are all identical with the 1st embodiment shown in Figure 1, so omit explanation to them at this.
In the present embodiment, be the peripheral part of damper movable end 45a as damper 45, damper 45 is installed on the damper fixed station 41f of the portion of bottom center that is located at yoke 41b.Damper fixed station 41f diameter 8mm, remove and yoke 41b between the fitting portion projection beyond height be 9mm, material is plastics.
Vibrating membrane 47 is identical with the 1st embodiment, is plane, and thickness is 2mm, and material is plastics.But the diameter of central portion projection is greater than the 1st embodiment, and its external diameter is 24mm, and internal diameter is 21mm, highly is 14mm.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st embodiment are identical.
In addition, present embodiment is by making damper movable end 45a the diameter increase of damper movable end 45a as the periphery of damper 45, so the diameter of vibrating membrane 47 central portions mounted thereto increases, and can relax the stress that applies in vibrating membrane 47 central part parts.Thereby thickness that can the attenuate vibrating membrane etc. increase the degree of freedom of vibrating membrane design.
Also having present embodiment is the bottom surface that the damper fixed station is installed in yoke, can certainly extend to framework the back side of yoke, and in the perforate of yoke bottom surface to be installed in the central portion of framework.
In addition, self-evident, the invention is not restricted to the foregoing description.
(embodiment 4)
Fig. 6 is the structure chart of the loudspeaker unit of the present invention the 4th embodiment.The bore of this loudspeaker unit also is 12cm, and the structure of its framework 52, vibrating membrane 57, edge 56, terminal board 54 is all identical with the loudspeaker unit of the 1st embodiment, so in the explanation of this omission to them.The 51st, excitatory portion, but present embodiment is an external magnetic type.51a is a magnet, external diameter 90mm, and internal diameter 50mm, thickness 9mm, material are ferrites.51b is a yoke, external diameter 85mm, and thickness 2mm, magnetic pole diameter are 45mm, and the magnetic pole height is 14mm, and material is an iron.51c is a plate, external diameter 85mm, and internal diameter 49.1mm, thickness 4mm, material are iron.51d is a magnetic gap, internal diameter 45mm, external diameter 49.1mm.51e is damper movable area space, and present embodiment is the hole that is located at the column top of yoke 51b.The diameter of the inlet in this hole is 38mm, and the bottom surface diameter is 30mm, and the degree of depth is 9mm.The 53rd, voice coil loudspeaker voice coil, maximum outside diameter 48.4mm.53a is the voice coil loudspeaker voice coil reel, and internal diameter is 45.48mm, and material is the aluminium of thickness 0.05mm.53b is a voice coil leads (another name: the silk colo(u)r streak).The 55th, damper, the height of ripple are 1.5mm, and material is a cotton.55a is the movable end of damper.
And the peripheral end of the damper 55 of present embodiment is installed in the column top of yoke 51b.Damper movable end 55a is installed in the central portion of vibrating membrane 57, and different with the conventional loudspeakers unit, and on the voice coil loudspeaker voice coil reel 53a that is not positioned at vertical direction in excitatory magnetic gap damper being installed, these are all with aforesaid
Embodiment is identical.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st embodiment are identical.
Because present embodiment is made external magnetic type to excitatory 51,, can enlarge arbitrarily again, so the efficient of easy raising loudspeaker unit so the diameter of magnet 51a is not limited by the bore of voice coil loudspeaker voice coil 53.
Also having present embodiment is the hole of damper movable area space being made the column top that is located at yoke, can certainly make through hole.Also can on post, paste pad etc. in addition, damper is installed then thereon.
In addition, self-evident, the invention is not restricted to the foregoing description.
(embodiment 5)
Fig. 7 is the structure chart of the loudspeaker unit of the present invention the 5th embodiment.The loudspeaker unit of present embodiment is except damper 65, and all the other structures are all identical with the 1st embodiment, and the Therefore, omited is to their explanation.
Present embodiment is that the peripheral part at damper 65 is provided with falling portion, make damper movable end 65a in the position of vertical direction than the stiff end 65b of damper 65 peripheral ends at the low 3mm in the position of vertical direction.
The effect of the basic role of the loudspeaker unit of the present embodiment of said structure and the 1st embodiment are identical.
Present embodiment is by being provided with damper movable end 65a to such an extent that be lower than the position of damper stiff end 65b in vertical direction in the position of vertical direction, earlier produce support during than displacement upward when making damper movable end 65a displacement downwards, so the bottom of voice coil loudspeaker voice coil 63 contacts with the bottom surface of yoke 61b and produces unusual sound can prevent damper movable end 65a displacement downwards the time.Thereby can be implemented in the loudspeaker unit that unusual sound also can not take place under the excessive input.
Self-evident, the invention is not restricted to the foregoing description.
(embodiment 6)
Fig. 8 is the structure chart of the loudspeaker unit of the present invention the 6th embodiment.The loudspeaker unit of present embodiment is except plate 71c, and all the other structures are all identical with the 1st embodiment shown in Figure 1, so in the explanation of this omission to them.
In the present embodiment, plate 71c is made the shape that vertically bends upward in the 71d of magnetic gap portion.The external diameter of the bending part of plate 71c is 60mm, and internal diameter is 30mm.Material is the iron plate of thickness 1.5mm, upward the about 2.5mm of bending.The size of magnetic gap 71d is identical with the loudspeaker unit of the 1st embodiment.
The basic role of the loud speaker of the present embodiment of said structure and effect and the 1st embodiment are identical.
In addition, because present embodiment is made the shape of bending upward to plate 71c at the 71d of magnetic gap portion, can be with thin material plate 71c, so can reduce the cost of loudspeaker unit and can alleviate its weight.
In addition, owing to the swing center point, be that the position of damper movable end is more near the bottom of voice coil loudspeaker voice coil, so when waving, the swing size of voice coil loudspeaker voice coil bottom is littler.
Present embodiment is that plate is made the shape that vertically bends upward in magnetic gap portion, can certainly increase the thickness of magnet, plate is made the shape that vertically bends in magnetic gap portion downwards.
In addition, self-evident, the invention is not restricted to the foregoing description.
(embodiment 7)
Fig. 9 is the structure chart of the loudspeaker unit of the present invention the 7th embodiment.The loudspeaker unit of present embodiment is except damper 85, and all the other structures all the 6th embodiment with shown in Figure 8 are identical, so in the explanation of this omission to them.
Present embodiment is that the peripheral part at damper 85 is provided with and highly is the elevated portion of 2.5mm, and the diameter of the anchor portion of damper 85 is 48mm, greater than the internal diameter of plate 81c.The height of ripple is 2mm, and overall height is 4.5mm.Material is a cotton.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st and the 6th embodiment are identical.Though the height of damper 85 has increased the elevated portion size of peripheral part, because available thin material plate 81c, so swing center point does not raise.
Also has present embodiment plate 81c vertically upwards bending at magnetic gap portion 81d place, and do the diameter of the anchor portion of damper 85 greater than the internal diameter of plate 81c, thereby can prolong the movable distance (length from the stiff end to the movable end) of damper 85, so can improve the linearity of loudspeaker unit.
In addition, owing to can alleviate the fatigue of damper 85,, can improve the reliability of loudspeaker unit so the fracture etc. of damper 85 can not take place.
In addition, self-evident, the invention is not restricted to the foregoing description.
(embodiment 8)
Figure 10 is the structure chart of the loudspeaker unit of the present invention the 8th embodiment.The loudspeaker unit of present embodiment is except vibrating membrane 97 and coupling cone 98, and all the other structures are identical with the 1st embodiment shown in Figure 1, so in the explanation of this omission to them.
The vibrating membrane 97 of present embodiment is not established the simple plane vibrating membrane of projection for central portion.And be provided with the coupling cone 98 that the top of voice coil loudspeaker voice coil reel 93a and damper movable end 95a and vibrating membrane 97 are carried out combination, and the central portion of coupling cone 98 is installed on the damper movable end 95a.
The diameter of vibrating membrane 97 is 80mm, and thickness 2mm, material are plastics.The external diameter of coupling cone 98 is 62mm, and overall height 10.5mm, material are the paper of thickness 0.5mm.And its periphery is provided with and voice coil loudspeaker voice coil reel 93a between fitting portion, its diameter is 61mm.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st embodiment are identical.
Present embodiment is owing to be provided with the coupling cone 98 that the top of voice coil loudspeaker voice coil reel 93a is combined with damper movable end 95a and vibrating membrane 97, so no longer need vibrating membrane 97 is installed on the damper movable end 95a, therefore alleviate the intensity burden of vibrating membrane 97 greatly, improved the degree of freedom of design significantly.
Also have, carry out,, can improve the output of loudspeaker unit so need not too high positioning accuracy because the installation of vibrating membrane 97 on coupling cone 98 can separate with voice coil loudspeaker voice coil 93, damper 95, the installation of coupling cone 98 on excitatory 91.
In addition, present embodiment is that vibrating membrane is made plane, can certainly make pyramid type or dome or other shapes.
In addition, self-evident, the invention is not restricted to the foregoing description.
(embodiment 9)
Figure 11 is the structure chart of the loudspeaker unit of the present invention the 9th embodiment.The loudspeaker unit of present embodiment is except characteristic trim tab 107a, coupling cone 108, and all the other structures are identical with the 8th embodiment shown in Figure 10, so in the explanation of this omission to them.
The coupling cone 108 of present embodiment is installed near the position of joint of the 1st high-frequency resonance frequency of vibrating membrane 107.The position of the joint of the 1st high-frequency resonance frequency of vibrating membrane 107 monomers is diameter 57mm.
107a is the characteristic trim tab, is attached to the back side of vibrating membrane 107, inwardly the position of the joint of the 1st high-frequency resonance frequency of Zhou Yidong adjusting vibrating membrane 107.The diameter of joint of the 1st high-frequency resonance frequency that posts the vibrating membrane 107 of characteristic trim tab 107a is 54mm.
The external diameter of coupling cone 108 is 62mm, and the diameter of its installed surface on vibrating membrane 107 is external diameter 56mm, internal diameter 52mm, and the installation site average diameter is 54mm.The overall height of coupling cone 108 is 10.5mm, and material is the paper of thickness 0.5mm.The diameter of characteristic trim tab 107a is 8mm, and thickness 3mm, material are the foam butyl rubber.When not having characteristic trim tab 107a, the position of the joint of vibrating membrane 107 is diameter 57mm.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st and the 8th embodiment are identical.
Also,, reproduction band can be expanded to the 2nd high-frequency resonance frequency so the peak value of the 1st high-frequency resonance frequency can not take place because the coupling cone 108 of present embodiment is installed near the position of joint of the 1st high-frequency resonance frequency of vibrating membrane 107.The 1st high-frequency resonance frequency of the vibrating membrane 107 of present embodiment is 1.5kHz, and the 2nd high-frequency resonance frequency is 5kHz, reproduction band can be expanded to this scope.
Present embodiment is to make the diameter of the coupling installation site of cone on vibrating membrane less than voice coil loudspeaker voice coil in addition, and is certainly also can the 10th embodiment described as follows such, makes its diameter greater than voice coil loudspeaker voice coil.
Again, present embodiment is a mounting characteristics trim tab on vibrating membrane, if but the installation site of coupling cone on vibrating membrane and the position consistency of the joint of the 1st high-frequency resonance frequency of vibrating membrane then not necessarily have this necessity.
In addition, self-evident, the invention is not restricted to the foregoing description.
(embodiment 10)
Figure 12 is the structure chart of the loudspeaker unit of the present invention the 10th embodiment.The bore of the loudspeaker unit of present embodiment is 12cm too, and the structure of framework 112, terminal board 114, edge 116, vibrating membrane 117 is identical with the 8th embodiment shown in Figure 10, so in the explanation of this omission to them.
The 111st, the excitatory portion of internal magnetic type.111a is a magnet, external diameter 40mm, and internal diameter 22mm, thickness 7mm, material are ferrite.1b is a yoke, and thickness 2mm, material are iron.1c is a plate, external diameter 45mm, and internal diameter 24mm, thickness 4mm, material are iron.1d is a magnetic gap, internal diameter 45mm, external diameter 49.1mm.
111e is damper movable area space, and is same with the embodiment except that Fig. 6, serves as this space with the interior perimembranous hole of plate 111c and magnet 111a.The 113rd, voice coil loudspeaker voice coil, maximum outside diameter are 48.4mm.113a is the voice coil loudspeaker voice coil reel, and internal diameter 45.48mm, material are the aluminium of thickness 0.05mm.113b is that voice coil leads (has another name called: the silk colo(u)r streak).
The 115th, damper, the diameter of stiff end are 24mm, and the height of ripple is 2mm, and material is a cotton.115a is the movable end of damper.
118 are the coupling cone, and external diameter is 58mm, and overall height 10mm, material are the paper of thickness 0.5mm.And the position of diameter 46mm be provided with and voice coil loudspeaker voice coil reel 113a between fitting portion.Installation site on vibrating membrane 117 is average diameter 57mm, is the position of joint of the 1st high-frequency resonance frequency of vibrating membrane 117.
And present embodiment is provided with elastomer 119 between coupling cone 118 and vibrating membrane 117.Elastomer 119 is external diameter 58mm, internal diameter 56mm, and material is the butyl rubber of thickness 1mm.
The basic role of the loudspeaker unit of the present embodiment of said structure and effect and the 1st and the 8th embodiment are identical.Present embodiment can make the sound pressure level of high frequency sharply decay by between coupling cone 118 and vibrating membrane 117 elastomer 119 being set, and can obtain being suitable for the characteristic of low frequencies.
Also have, present embodiment is the position of joint that the coupling cone is installed on the 1st high-frequency resonance frequency of vibrating membrane, not necessarily will do like this in the occasion that has certainly.
In addition, self-evident, the present invention is not limited to the foregoing description.
The possibility of industrial application
As mentioned above, the present invention is arranged on damper than excitatory magnetic by internal magnetic type is made by excitatory section The position of crack more inner Monday of side is the interior perimembranous hole of damper amplitude movable area as excitatory section, resistance Buddhist nun's device movable end is as the interior perimembranous of damper, and handle is installed in the vibrational system position work of damper movable end Be the central portion of vibrating membrane, thus can be not arrange above the excitatory section damper movable end below displacement The amplitude space is so can make the loudspeaker unit slimming.
In addition, owing to the distance that has shortened significantly from the swing center point to the voice coil loudspeaker voice coil bottom, so even send out Give birth to and wave, the swing in the horizontal direction of voice coil loudspeaker voice coil bottom is also very little, can prevent that it from contacting with excitatory and producing Give birth to unusual sound, also can reproduce big acoustic pressure.
By internal magnetic type is made by excitatory section, damper was arranged on than excitatory magnetic gap more inner Monday again, The position of side, the interior perimembranous hole of damper amplitude movable area space as excitatory section, movable damper End is as the damper peripheral part, and the vibrational system position that is installed in the damper movable end as vibrating membrane Central portion can be realized slimming too, and the unusual sound that causes because waving can not take place.
By external magnetic type is made by excitatory section, damper was arranged on than excitatory magnetic gap more inner Monday again, The position of side is located at the yoke iron column top to damper amplitude movable area space, the damper movable end as The interior perimembranous of damper, and being installed in the vibrational system position of damper movable end as the central authorities of vibrating membrane Section can not be subjected to the restriction of voice coil loudspeaker voice coil bore and at random increases magnet, so can easily improve loudspeaker unit Efficient.
Again, by making the damper movable end be lower than the position of damper stiff end in the position of vertical direction in vertical direction, make the damper movable end downwards displacement ratio upward displacement earlier produce support, the bottom of voice coil loudspeaker voice coil is contacted with the bottom surface of yoke and produce unusual sound so can prevent the displacement downwards of damper movable end, even there is excessive input also can not produce unusual sound.
Also have, by excitatory plate being made the shape that upwards bends in magnetic gap portion, can be with thin made plate, so can reduce the cost of loudspeaker unit and alleviate its weight.And, can improve linear characteristic and reliability by the diameter of damper anchor portion being made internal diameter greater than plate.
Again, by a voice coil loudspeaker voice coil reel top and damper movable end being set and vibrating membrane-bound coupling cone, and a central portion of coupling cone is installed in the damper movable end, make the installation of vibrating membrane on the coupling cone need not too high positioning accuracy, so can improve the output of loudspeaker unit.In addition,, can not produce the peak value of the 1st high-frequency resonance frequency of vibrating membrane, can expand reproduction band to the 2nd high-frequency resonance frequency owing to the coupling cone is installed near the position of joint of the 1st high-frequency resonance frequency of vibrating membrane.
By between coupling cone and vibrating membrane, elastomer being set, high frequency is sharply decayed again.
As mentioned above, the present invention has great practical value.
Claims (13)
1. loudspeaker unit, it is characterized in that, have: be arranged on damper than excitatory magnetic gap more inner Monday of side, and the excitatory portion that below described damper, is provided with damper amplitude movable area space, the movable end that vibrational system position except the voice coil loudspeaker voice coil reel that is positioned at vertical direction in described excitatory magnetic gap is installed in described damper is with the supporting vibrational system, the damper of mounting support vibrational system not on the described voice coil loudspeaker voice coil reel, and described excitatory portion made internal magnetic type, the interior all hole portion of described damper amplitude movable area space as described excitatory portion, the peripheral part of described damper movable end as described damper, and being installed in the central portion of the vibrational system position of described damper movable end as vibrating membrane.
2. loudspeaker unit, it is characterized in that, have: be arranged on damper than excitatory magnetic gap more inner Monday of side, and the excitatory portion that below described damper, is provided with damper amplitude movable area space, the movable end that vibrational system position except the voice coil loudspeaker voice coil reel that is positioned at vertical direction in described excitatory magnetic gap is installed in described damper is with the supporting vibrational system, the damper of mounting support vibrational system not on the described voice coil loudspeaker voice coil reel, and described excitatory portion made external magnetic type, described damper amplitude movable area space is located at the yoke iron column top, the interior perimembranous of described damper movable end as described damper, and being installed in the central portion of the vibrational system position of described damper movable end as vibrating membrane.
3. loudspeaker unit according to claim 1 and 2 is characterized in that, makes the vertical direction position of damper movable end be lower than the vertical direction position of damper stiff end.
4. loudspeaker unit according to claim 1 is characterized in that, excitatory plate made the shape that vertically bends in magnetic gap portion.
5. loudspeaker unit according to claim 1 and 2 is characterized in that, the coupling cone that voice coil loudspeaker voice coil reel top is combined with damper movable end and vibrating membrane is set, and the central portion of described coupling cone is installed in described damper movable end.
6. loudspeaker unit according to claim 5 is characterized in that, the coupling cone is installed near the position of joint of the 1st high-frequency resonance frequency of vibrating membrane.
7. loudspeaker unit according to claim 5 is characterized in that, between coupling cone and vibrating membrane elastomer is set.
8. loudspeaker unit according to claim 1 and 2 is characterized in that, makes the vertical direction position of damper movable end be higher than the vertical direction position of damper stiff end.
9. loudspeaker unit according to claim 3 is characterized in that, excitatory plate made the shape that vertically bends in magnetic gap portion.
10. loudspeaker unit according to claim 3 is characterized in that, the coupling cone that voice coil loudspeaker voice coil reel top is combined with damper movable end and vibrating membrane is set, and the central portion of described coupling cone is installed in described damper movable end.
11. loudspeaker unit according to claim 6 is characterized in that, between coupling cone and vibrating membrane elastomer is set.
12. loudspeaker unit according to claim 4 is characterized in that, makes the vertical direction position of damper movable end be higher than the vertical direction position of damper stiff end.
13. loudspeaker unit according to claim 5 is characterized in that, makes the vertical direction position of damper movable end be higher than the vertical direction position of damper stiff end.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP42564/96 | 1996-02-29 | ||
| JP42564/1996 | 1996-02-29 | ||
| JP04256496A JP3233004B2 (en) | 1996-02-29 | 1996-02-29 | Speaker unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1211380A CN1211380A (en) | 1999-03-17 |
| CN1123277C true CN1123277C (en) | 2003-10-01 |
Family
ID=12639556
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97192332 Expired - Fee Related CN1123277C (en) | 1996-02-29 | 1997-02-07 | Loudspeaker unit |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3233004B2 (en) |
| CN (1) | CN1123277C (en) |
| GB (1) | GB2325373B (en) |
| WO (1) | WO1997032451A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107347174A (en) * | 2017-08-30 | 2017-11-14 | 钟礼通 | A kind of loudspeaker and audio amplifier using Volume Control Technology |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004538733A (en) * | 2001-08-10 | 2004-12-24 | コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ | Speaker with three-dimensional diaphragm |
| EP1737269B1 (en) | 2005-06-21 | 2012-10-10 | Harman International Industries Ltd. | Shallow loudspeaker |
| WO2007086315A1 (en) * | 2006-01-24 | 2007-08-02 | Matsushita Electric Industrial Co., Ltd. | Speaker and electronic apparatus and device using the same |
| JP4912922B2 (en) * | 2007-02-28 | 2012-04-11 | ミネベア株式会社 | Speaker |
| US8682022B2 (en) | 2008-10-24 | 2014-03-25 | Jason Myles Cobb | Loudspeaker |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5653897U (en) * | 1979-10-01 | 1981-05-12 | ||
| JPS6214797Y2 (en) * | 1980-03-19 | 1987-04-15 | ||
| JPS5718200A (en) * | 1980-07-09 | 1982-01-29 | Hitachi Ltd | Plane type loudspeaker |
| JPS59180594U (en) * | 1983-05-20 | 1984-12-03 | 三菱電機株式会社 | speaker |
| JPH04192800A (en) * | 1990-11-26 | 1992-07-10 | Sharp Corp | Electromechanical converter |
-
1996
- 1996-02-29 JP JP04256496A patent/JP3233004B2/en not_active Expired - Fee Related
-
1997
- 1997-02-07 WO PCT/JP1997/000334 patent/WO1997032451A1/en active Search and Examination
- 1997-02-07 CN CN 97192332 patent/CN1123277C/en not_active Expired - Fee Related
- 1997-02-07 GB GB9818737A patent/GB2325373B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107347174A (en) * | 2017-08-30 | 2017-11-14 | 钟礼通 | A kind of loudspeaker and audio amplifier using Volume Control Technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1211380A (en) | 1999-03-17 |
| JP3233004B2 (en) | 2001-11-26 |
| GB2325373A (en) | 1998-11-18 |
| JPH09238396A (en) | 1997-09-09 |
| GB2325373B (en) | 2000-08-16 |
| WO1997032451A1 (en) | 1997-09-04 |
| GB9818737D0 (en) | 1998-10-21 |
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