CN106465018A - Speaker unit and speaker comprising that speaker unit - Google Patents
Speaker unit and speaker comprising that speaker unit Download PDFInfo
- Publication number
- CN106465018A CN106465018A CN201480079606.7A CN201480079606A CN106465018A CN 106465018 A CN106465018 A CN 106465018A CN 201480079606 A CN201480079606 A CN 201480079606A CN 106465018 A CN106465018 A CN 106465018A
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- voice coil
- space
- loudspeaker unit
- oscillating plate
- intercommunicating pore
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- 239000011148 porous material Substances 0.000 claims description 86
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 230000003467 diminishing effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 14
- 239000000203 mixture Substances 0.000 description 13
- 230000008859 change Effects 0.000 description 5
- 230000001629 suppression Effects 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 2
- 238000004512 die casting Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
Classifications
-
- 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
- H04R1/30—Combinations of transducers with horns, e.g. with mechanical matching means, i.e. front-loaded horns
-
- 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
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
- Diaphragms For Electromechanical Transducers (AREA)
- Details Of Audible-Bandwidth Transducers (AREA)
Abstract
A speaker unit (1) comprises: a ring-shaped diaphragm (20); a ring-shaped voice coil (21) disposed along the circumference of the diaphragm and midway in the radius direction of the diaphragm; a magnetic circuit (10) having a magnetic gap into which the voice coil is inserted; and a case (40) having a sound path (LS) for guiding sounds generated from the diaphragm to the exterior. A first space (SA) is defined at least by a first portion inner relative to the voice coil of the diaphragm, the voice coil and by the magnetic circuit (10), while a second space (SB) is defined at least by a second portion outer relative to the voice coil of the diaphragm, the voice coil and by the magnetic circuit. The speaker unit has: at least one first communicating hole (17a) that communicates with the first space and with the internal space (SN) of the magnetic circuit; and at least one second communicating hole (49a) that communicates with the second space and with a side space (SO) beside the magnetic circuit (10).
Description
Technical field
The present invention relates to loudspeaker unit and the speaker possessing this loudspeaker unit.
Background technology
Known have the loudspeaker unit improving acoustic characteristic.
For example, the loudspeaker unit described in patent documentation 1 possesses magnetic loop, voice coil loudspeaker voice coil, dome-type oscillating plate and supporting
The pillar of oscillating plate.
Dome-type space between oscillating plate and magnetic loop is located at magnetic loop rear via the Kong Eryu being arranged at pillar
Space connection.According to this composition, the space enlargement of the rear side of oscillating plate, so the suppression that back pressure changes is warmed up,
Acoustic characteristic is improved.
Prior art literature
Patent documentation
Patent documentation 1：International Publication No. 2010/023759
Content of the invention
Invent problem to be solved
However, it is known that having the loudspeaker unit of the oscillating plate of ring-type.
This loudspeaker unit uses as the speaker (tweeter) for high range mostly.Therefore, from former
Start with regard to not carrying out the improvement in middle bass domain.
The present invention makes in view of the foregoing, it is intended that providing a kind of loudspeaker unit and possessing this
The speaker of loudspeaker unit, this loudspeaker unit has the oscillating plate of ring-type, compared with existing structure, has in middle bass domain
Excellent acoustic characteristic.
Means for solving the problems
(1) solve the loudspeaker unit of above-mentioned problem, have：The oscillating plate of ring-type；The voice coil loudspeaker voice coil of ring-type, along described vibration
The circumferencial direction of plate is arranged at the radial direction middle part of described oscillating plate；Magnetic loop, has the magnetic gap inserted for described voice coil loudspeaker voice coil；With
And housing, have the sound guidance sending from described oscillating plate to outside sound channel, wherein, at least by with respect to described vibration
The described voice coil loudspeaker voice coil of plate is located at the part 1 of inner side, described voice coil loudspeaker voice coil and described magnetic loop and delimit the 1st space, at least by with respect to
Part 2, described voice coil loudspeaker voice coil and described magnetic loop that the described voice coil loudspeaker voice coil of described oscillating plate is located at outside delimit the 2nd space, described
Loudspeaker unit has at least one the 1st intercommunicating pore and at least one the 2nd intercommunicating pore, and at least one the 1st intercommunicating pore is empty by the described 1st
Between connect with the back space at rear portion being located at described magnetic loop, at least one the 2nd intercommunicating pore is by described 2nd space with positioned at institute
State the side spaces connection of the sidepiece of magnetic loop.
According to this structure, near 1st space of radially inner side and magnetic return positioned at the rear side of oscillating plate and compared to voice coil loudspeaker voice coil
The back space on road is interconnected, thus the 1st space enlargement of the rear side of oscillating plate.In addition, being located at the rear side of oscillating plate
And be interconnected near the side spaces of the 2nd space of radial outside and the sidepiece being located at magnetic loop compared to voice coil loudspeaker voice coil, thus shaking
2nd space enlargement of the rear side of dynamic plate.Thus, back of the body chamber expands, and the acoustic characteristic in middle bass domain is improved.
(2) in above-mentioned loudspeaker unit, described loudspeaker unit is also equipped with the phase plug being arranged on described oscillating plate,
Described sound channel includes the annulus being formed between described housing and described phase plug, the annulus of described sound channel have from
Interior side's opening is towards the diminishing sectional area in outlet opening end.
In the loudspeaker unit with predetermined outlet opening end, use big footpath sometimes for improving sound equipment output
Oscillating plate.In this case it is difficult to make the outlet opening end of loudspeaker unit sectional area enough with respect to the size of oscillating plate
Greatly.In this composition, if forming sound channel in the way of the sectional area of sound channel gradually expands, the sound channel of interior side's opening of sound channel
Width (width of interior side's opening of ring-type) becomes narrow, and the discharging amount of sound equipment energy is restricted.
For this problem, according to above-mentioned composition it is ensured that the sound channel width of interior side's opening of sound channel is enough, so sound equipment
The utilization rate of energy improves.In addition, the sectional area of the annulus of sound channel gradually contracts towards outlet opening end from interior side's opening
Little, thus the transmission loss of sound channel is suppressed.Therefore, the efficiency of loudspeaker unit improves.
(3) in above-mentioned loudspeaker unit, described housing includes：Lid, has described sound channel；And housing body, storage
Described magnetic loop, described loudspeaker unit possesses the resinous seal member being arranged between described lid and described magnetic loop,
Described oscillating plate is configured at the inner side of described seal member, described at least one the 2nd connection between described lid and described magnetic loop
Hole includes groove or the through hole being formed at described seal member.
Resinous seal member is easily worked compared to plate.Therefore, according to above-mentioned composition, it is arranged at the 2nd intercommunicating pore
The situation of plate is compared, and the production efficiency of loudspeaker unit improves.
(4) in above-mentioned loudspeaker unit, described magnetic loop includes：The Magnetitum of ring-type, is configured at and leans on institute than described voice coil loudspeaker voice coil
State the radial outside of oscillating plate；The plate of ring-type, is arranged on the face opposed with described oscillating plate of described Magnetitum；And yoke,
Configure in the way of the inner peripheral surface with respect to described plate forms described magnetic gap, described yoke includes：It is arranged at the position of described Magnetitum
Backboard portion on the face of described plate opposition side；Surrounding wall portion along the inner peripheral surface of described Magnetitum；And by described surrounding wall portion
The front panel portion that front end covers, the described front panel portion of described yoke is run through by described 1st intercommunicating pore.That is, in external magnetic type
In the case of loudspeaker unit, the 1st intercommunicating pore is arranged at yoke.
(5) in above-mentioned loudspeaker unit, described magnetic loop includes：The Magnetitum of ring-type, is configured at and leans on institute than described voice coil loudspeaker voice coil
State the radially inner side of oscillating plate；The plate of round shape, is arranged on the face opposed with described oscillating plate of described Magnetitum；And yoke,
It is arranged on the face positioned at described plate opposition side of described Magnetitum, and described magnetic gap is formed with the outer peripheral face with respect to described plate
Mode configures, and described plate is run through by described 1st intercommunicating pore.That is, in the case of the loudspeaker unit of internal magnetic type, the 1st
Intercommunicating pore is arranged at plate.
(6) in above-mentioned loudspeaker unit, described housing receives described oscillating plate, described voice coil loudspeaker voice coil and described magnetic loop,
Described back space at least delimited by the part and described housing of the described oscillating plate opposition side of described magnetic loop, and described sidepiece is empty
Between at least delimited by the sidepiece of described magnetic loop and described housing.
(7) in above-mentioned loudspeaker unit, possesses seal member, described seal member is arranged at described magnetic loop and institute
State between housing, will separate between described 2nd space and described side spaces, described at least one the 2nd intercommunicating pore is included with by institute
State groove or the through hole that the mode that the 2nd space connects is formed at described seal member with described side spaces.
(8) speaker solving above-mentioned problem possesses above-mentioned loudspeaker unit.Therefore, this speaker is existing compared to having
The speaker of structured annular vibration plate, the acoustic characteristic in middle bass domain is excellent.
Invention effect
Above-mentioned loudspeaker unit and speaker have excellent acoustic characteristic compared to existing structure in middle bass domain.
Brief description
Fig. 1 is the exploded view of the loudspeaker unit being related to the 1st embodiment.
Fig. 2 is the cross-sectional perspective view of loudspeaker unit.
Fig. 3 is the enlarged drawing of sound channel.
Fig. 4 is the curve chart of the change of the sectional area illustrating sound channel.
Fig. 5 is the curve chart illustrating acoustic characteristic.
Fig. 6 is the curve chart illustrating acoustic characteristic.
Fig. 7 is the curve chart illustrating acoustic characteristic.
Fig. 8 is the curve chart illustrating acoustic characteristic.
Fig. 9 is the sectional view of the loudspeaker unit being related to the 2nd embodiment.
Specific embodiment
(the 1st embodiment)
With reference to Fig. 1～Fig. 8, illustrate to be related to the loudspeaker unit of the 1st embodiment.
In addition, in the explanation of the 1st embodiment, " front side " and " front " side representing output sound, " rear side " with
And " afterwards " and represent voice output side opposition side.In addition, " back side " is the face contrary with the face of output sound.
As shown in figure 1, loudspeaker unit 1 possesses magnetic loop 10, oscillating plate 20, voice coil loudspeaker voice coil 21, phase plug 30 and receives this
The housing 40 (with reference to Fig. 2) of a little parts.In addition, phase plug 30 is the part of the phase alignment for making sound wave.
Fig. 2 illustrates the cross-sectional perspective view of loudspeaker unit 1.
As shown in Figure 1 and Figure 2, magnetic loop 10 possesses：The Magnetitum 11 of ring-type；The plate 12 of ring-type, it is configured at Magnetitum 11
Front surface；And yoke 13, it configures in the way of the inner peripheral surface 12b with respect to plate 12 forms magnetic gap G.
Yoke 13 has：Backboard portion 14, it is configured at the rear surface of Magnetitum 11；And central part 15, it is inserted through Magnetitum
11 centre bore 11a.
Central part 15 possesses：Surrounding wall portion 16, it is in a circumferential direction along the inner peripheral surface of Magnetitum 11；And front panel portion 17,
The front end of surrounding wall portion 16 is covered by it.In the inner side of surrounding wall portion 16, there is internal space S N.That is, internal space S N is at least by perisporium
Portion 16 and front panel portion 17 delimited.In addition, internal space S N is belonging to be present in after rear side compared to the front surface of magnetic loop 10
The concept in portion space.
The front panel portion 17 of central part 15 is located at the centre bore 12a (referring to Fig. 1) of plate 12.Outer peripheral face 15a in central part 15
It is provided with gap (that is, magnetic gap G), voice coil loudspeaker voice coil 21 is inserted through this seam between the inner peripheral surface 12b (referring to Fig. 1) of (referring to Fig. 1) and plate 12
Gap.
In addition, the front panel portion 17 in central part 15 is provided with connecting portion 18, connect phase plug 30 in connecting portion 18.Connecting portion
18 project from the central part of central part 15.The diameter of connecting portion 18 is less than the diameter of the front panel portion 17 of central part 15.In front panel portion
17, the circumferencial direction along connecting portion 18 is equally spaced formed with multiple 1st intercommunicating pore 17a.Each 1st intercommunicating pore 17a will be aftermentioned
The 1st space S A and internal space S N (that is, back space) connection.1st space S A is at least by the voice coil loudspeaker voice coil with respect to oscillating plate 20
21 part 1s being located at inner side (include the part of internal ring portion 20a described later.), 13 strokes of the yoke of voice coil loudspeaker voice coil 21 and magnetic loop 10
Fixed.
Oscillating plate 20 is formed by the plate member of ring-type.The voice coil loudspeaker voice coil of cylindrical shape is installed in the radial direction middle part of oscillating plate 20
21.In other words, the radial direction middle part in oscillating plate 20 is provided with the sound of the ring-type of the circumferencial direction setting along oscillating plate 20
Circle 21.The diameter of the outlet opening end 45b with diameter greater than loudspeaker unit 1 of voice coil loudspeaker voice coil 21.
On oscillating plate 20, than voice coil loudspeaker voice coil 21 near radially inner side part (hereinafter referred to as " internal ring portion 20a ".) face and sound
The angle being formed between the side face of circle 21 is more than 90 degree.In addition, similarly, on oscillating plate 20, more outside near footpath than voice coil loudspeaker voice coil 21
The part of side is (hereinafter referred to as " outer portion 20b ".) face and the side face of voice coil loudspeaker voice coil 21 between formed angle be more than 90 degree.
The inner peripheral portion of the internal ring portion 20a of oscillating plate 20 is held in the base portion 31 of phase plug 30 and the connecting portion 18 of yoke 13
Between.
The peripheral part of outer portion 20b of oscillating plate 20 is held between seal member 49 described later and lid 41.
Phase plug 30 has：Base portion 31 (referring to Fig. 3), is connected with the connecting portion 18 of yoke 13 via intervening components 19；With
And main part 32, it is arranged on this base portion 31, and constitute the inner surface of sound channel LS.
The general shape of main part 32 is cone, and main part 32 is formed as narrowing towards top from base portion 31.Main part
32 cross sectional shape (profile in section) vertically cutting with central shaft C1, is independently circle with the position of central shaft C1
Shape.The side 32a of main part 32 tilts towards central shaft C1.In the base portion 31 side part of main part 32 and the front panel portion of yoke 13
There is the space of ring-type between 17.Internal ring portion 20a in this space configuration oscillating plate 20.
The bolt 33 that phase plug 30 is inserted through the hole along central shaft C1 fastens.The header arrangement of bolt 33 is in phase plug
30 top.The head of bolt 33 is preferably hemispherical or is similar to hemispheric shape.
Housing 40 possesses the lid 41 covering the front side of oscillating plate 20 and receives oscillating plate 20 and magnetic loop 10
Housing body 46.
Housing body 46 has the side wall 47 of the side encirclement of magnetic loop 10 and diapire 48.
It is provided with space (hereinafter referred to as " side spaces SO ") between the side wall 47 and magnetic loop 10 of housing body 46.?
It is provided with space (hereinafter referred to as " bottom space SD ") between the diapire 48 of housing body 46 and magnetic loop 10.In addition, bottom is empty
Between SD be belonging to magnetic loop 10 above-mentioned back space concept.
Lid 41 has：Central part 42, has the through hole 45 for making sound converge；Circumferential part 43, is arranged at central part
42 around, and the front surface of magnetic loop 10 is covered；And peripheral part 44, it is arranged at circumferential part 43 around, with housing body
46 side wall 47 connects.
It is configured with the seal member 49 of ring-type between the circumferential part 43 and the plate 12 of magnetic loop 10 of lid 41.Seal member 49
Formed by resin or metal (for example, aluminum).Seal member 49 is by such as die forming.
Lid 41 and と magnetic loops 10 between and the space configuration oscillating plate 20 in the inner side of seal member 49.
Between seal member 49 and plate 12, multiple 2nd intercommunicating pore 49a have been equally spaced it in circumferencial direction.Each 2nd
Intercommunicating pore 49a radially extends along seal member 49 and plate 12.
For example, the groove structure that each 2nd intercommunicating pore 49a is formed as the part excision by the face of the plate 12 of seal member 49
Become.Each 2nd intercommunicating pore 49a is by the space of the rear side of outer portion 20b (hereinafter referred to as " the 2nd space S B ".) with housing 40 in
Side spaces SO connect.2nd space S B at least (includes outer by the part 2 that the voice coil loudspeaker voice coil 21 with respect to oscillating plate 20 is located at outside
The part of ring portion 20b.), the plate 12 of voice coil loudspeaker voice coil 21 and magnetic loop 10 delimit.
The through hole 45 being arranged at the central part 42 of lid 41 is formed as from interior side opening 45a towards outlet opening end 45b
Become narrow gradually.The cross sectional shape (profile in section) vertically cutting with central shaft C2 of through hole 45, the position with central shaft C2
Put and be independently circle.It is configured with phase plug 30 in through hole 45.Space between through hole 45 and phase plug 30 is constituted
A part for sound channel LS of guiding sound.Sound channel LS is by the sound guidance sending from oscillating plate 20 to outside.
As described above, loudspeaker unit 1 has：Multiple 1st intercommunicating pore 17a, by the 1st space S A of the dorsal part of oscillating plate 20
Connect with internal space S N；And multiple 2nd intercommunicating pore 49a, by the 2nd space S B of the dorsal part of oscillating plate 20 and side spaces SO
Connection.The effect being produced by multiple 1st intercommunicating pore 17a and multiple 2nd intercommunicating pore 49a is below described.
The known efficiency having by bass domain in can improving the space enlargement of the rear side of oscillating plate 20.Raising one's voice
Device unit 1 be said structure in the case of that is to say, that being divided into respect to voice coil loudspeaker voice coil in the space of the rear side of oscillating plate 20
21 the 1st space S A being located at inner side and be located at outside the 2nd space S B in the case of it may be considered that by the 1st space S A and the 2nd
Any one space in space S B connects with bottom space SD.
But, the 1st space S A and the 2nd space S B connect via magnetic gap G, and the width of magnetic gap G is little, so this magnetic gap G becomes
The barrier of air movement.In addition, only in the setting of one of the 1st space S A and the 2nd space S B space with back space even
In the case of logical intercommunicating pore, it is possible to create the sound wave of mode of resonance.In view of this situation, in the present embodiment, in oscillating plate
20 dorsal part and the 1st space S A separating and the 2nd space S B separately arrange intercommunicating pore by voice coil loudspeaker voice coil 21.
In addition, in the 1st embodiment, than voice coil loudspeaker voice coil 21 the 1st space S A in the inner part and the yoke 13 clipping plate 12 configuration
Internal space S N connection.That is, the 1st space S A is by having a 1st intercommunicating pore 17a of shorter length and empty with inside
Between SN connection.Therefore, the connected space being made up of the 1st space S A and internal space S N, and by the 1st space S A and bottom space SD
Connection constitute connected space compare, stability diminishes.In addition, than voice coil loudspeaker voice coil 21 the 2nd space S B in the outer part with clip sealing
The side spaces SO connection of part 49 configuration.That is, the 2nd space S B passes through the 2nd intercommunicating pore 49a with shorter length
And connect with side spaces SO.Therefore, the connected space being made up of the 2nd space S B and side spaces SO, with by the 2nd space S B and
The connected space that the connection of bottom space SD is constituted is compared, and stability diminishes.Thus, it is possible to expect the pressure change of the 1st space S A
The dynamic impact of internal ring portion 20a to oscillating plate 20 and the pressure oscillation of the 2nd space S B are to outer portion 20b of oscillating plate 20
Impact is all less.
That is, in the case that any one party of the 1st space S A and the 2nd space S B is provided with intercommunicating pore, because humorous
Pattern of shaking and lead to a part of generation efficiency in midrange to decline, but by both the 1st space S A and the 2nd space S B
Setting intercommunicating pore, thus mode of resonance is inhibited, declines in the efficiency of midrange and reduces.In addition, its reason considers
For as follows：Stability (stiffness) including the connected space of the 1st space S A and the connected space including the 2nd space S B
Stability all become less, back pressure change suppression relaxed, so pass through the 1st intercommunicating pore 17a and the 2nd intercommunicating pore
The cripetura of 49a, further suppresses the efficiency in midrange to decline.
In addition, the sectional area of the sectional area of the 1st intercommunicating pore 17a and the 2nd intercommunicating pore 49a suitably sets.By adjusting the 1st
The sectional area of the sectional area of intercommunicating pore 17a and the 2nd intercommunicating pore 49a such that it is able in adjustment bass domain efficiency increase rate.
For example, by reduce they sectional area such that it is able to suppression in bass domain efficiency increase rate, thereby, it is possible to improve sound
The bright property (the listening to easness of sound) of sound.
Then, with reference to Fig. 3, the structure of sound channel LS is described.Fig. 3 illustrates the enlarged drawing of sound channel LS.
Sound channel LS is divided into the part (hereinafter referred to as " ring-type constituting as the space between through hole 45 and phase plug 30
Part ") and it is configured without the part (hereinafter referred to as " circular cylinder shaped portion ") of phase plug 30 in through hole 45.
The cross sectional shape of the annulus in sound channel LS is gradually reduced towards outlet opening end 45b from interior side opening 45a.
In addition, in sound channel LS, the sectional area of at least annulus is from interior side opening 45a towards outlet opening end 45b
It is gradually reduced.As a result, in the 1st embodiment, the sectional area that sound channel LS is configured to interior side opening 45a is more than outlet opening
The sectional area of end 45b.
In the prior art, for the purpose of the efficiency improving loudspeaker unit 1, the sectional area of sound channel LS is from interior side's opening
45a gradually expands towards outlet opening end 45b.
In contrast, this technology possesses the composition contrary with the composition of prior art.The advantage being obtained by this composition
It is explained below.
The diameter of outlet opening end 45b sets according to such as standard specificationss.On the other hand, the size of oscillating plate 20 arbitrarily sets
Fixed.In the case of requiring the loudspeaker unit 1 of height output, using large-scale oscillating plate 20.In the 1st embodiment, vibration
The diameter (diameter of part corresponding with voice coil loudspeaker voice coil 21) of plate 20 is more than the diameter of outlet opening end 45b.If the diameter of oscillating plate 20
Become big, then correspondingly, the diameter of the interior side opening 45a of sound channel LS also becomes big.In this case, if as existing skill
Art is like that, premised on the gradual enlargement of sound channel LS, straight corresponding to the interior side opening 45a increasing sound channel LS
Footpath, needs to reduce sound channel width D S of the interior side opening 45a of sound channel LS.If sound channel width D S narrows, it is released to outside
The whole tone that discharging amount is exported with oscillating plate 20 rings the ratio of energy (hereinafter referred to as " capacity usage ratio ".) diminish, so produce in
The problem that bass domain efficiency declines.
In the loudspeaker unit 1 of the 1st embodiment, in view of the foregoing, in order to improve capacity usage ratio, make sound channel LS
Interior side opening 45a aperture area be more than sound channel LS outlet opening end 45b aperture area.Thus, improve energy profit
Use efficiency.
But, only the aperture area of the interior side opening 45a of sound channel LS is set as the outlet opening than sound channel LS
If the aperture area of end 45b is big, sometimes may not necessarily improve efficiency.This point is described below.
Fig. 4 illustrate to depict the sectional area of sound channel LS with respect within square opening 45a be starting point distance relation
Curve (curve schematically showing).
These curves are by regarding the part corresponding with phase plug 30 in the through hole 45 of lid 41 as the frustum of a cone and inciting somebody to action
Phase plug 30 regard as circular cone (wherein, top is set to hemispherical.) and derive.The intermediate point of Fig. 4 illustrates the ring-type of sound channel LS
Partial terminal (the junction point of annulus and circular cylinder shaped portion.The summit of bolt 33.).
The sectional area of curve L2 square opening 45a within illustrating is (hereinafter referred to as " interior side's opening section amasss ".) open than output
The sectional area of mouth end 45b is (hereinafter referred to as " outlet opening area ".) slightly larger mode set in the case of loudspeaker unit 1
The change of the sectional area of sound channel LS.
In curve L2, the peak value of sectional area is present in from the interior side opening 45a of sound channel LS to intermediate point.Namely
Say, curve L2 represents that the sectional area of sound channel LS gradually expands and reduces after exceeding the peak value of sectional area.There is this sound channel LS
Loudspeaker unit 1 in, efficiency decline.This is because, sound channel LS sectional area from expanding the scope reducing to, produce sound wave
Transmission loss.
Curve L1 illustrates to be configured to that interior side's open area ratio outlet opening area is big and sectional area of sound channel LS is gradually reduced
In the case of the sectional area of sound channel LS of loudspeaker unit 1 change.According to the loudspeaker unit 1 with this sound channel LS,
Compared with the loudspeaker unit 1 of sound channel LS with curve L2, efficiency improves.The sectional area of sound channel LS is gradually reduced, so suppression
The transmission loss of sound wave processed.
With reference to Fig. 5～Fig. 8, illustrate to arrange the 1st intercommunicating pore 17a and the 2nd intercommunicating pore 49a in loudspeaker unit 1 and produce
Effect and make the effect that the sectional area of above-mentioned sound channel is gradually reduced and produces.In addition, the acoustic characteristic shown in Fig. 5～Fig. 8
Curve illustrates the relation that sound press is with respect to frequency.
Fig. 5 illustrates acoustic characteristic SP1, SP2 of the loudspeaker unit of the 1st reference example and the 2nd reference example.
In the loudspeaker unit of the 1st reference example, it is not provided with the 1st intercommunicating pore 17a and the 2nd intercommunicating pore 49a, and interior side
Aperture area is less than outlet opening area.In addition composition is identical with above-mentioned shown loudspeaker unit 1.That is,
The loudspeaker unit of the 1st reference example is the loudspeaker unit of existing structure.
In the loudspeaker unit of the 2nd reference example, with respect to the loudspeaker unit of the 1st reference example, it is provided with the 1st intercommunicating pore
17a.That is, the loudspeaker unit of the 2nd reference example the 1st intercommunicating pore 17a is by the back of the body of the internal ring portion 20a positioned at oscillating plate 20
Connect between 1st space S A of side and internal space S N of yoke 13.
As shown in figure 5, acoustic characteristic SP2 of the loudspeaker unit of the 2nd reference example, in middle bass domain (70Hz～500Hz)
There is the efficiency (referring to arrow A) higher than acoustic characteristic SP1 of the loudspeaker unit of the 1st reference example.This is because setting the 1st is even
Through hole 17a and the effect that produces.But, acoustic characteristic SP2 of the loudspeaker unit of the 2nd reference example midrange (500Hz～
1kHz) there is the efficiency (referring to arrow B) lower than acoustic characteristic SP1 of the loudspeaker unit of the 1st reference example.This is because resonance
The generation of pattern and cause.
Fig. 6 illustrates the acoustic characteristic of the loudspeaker unit of the 1st reference example and the 3rd reference example.
The loudspeaker unit of the 3rd reference example, with respect to the loudspeaker unit of the 1st reference example, is provided with the 2nd intercommunicating pore 49a.
That is, the loudspeaker unit of the 3rd reference example the 2nd intercommunicating pore 49a is by the dorsal part of outer portion 20b positioned at oscillating plate 20
Connect between 2nd space S B and side spaces SO.
As shown in fig. 6, acoustic characteristic SP3 of the loudspeaker unit of the 3rd reference example has in middle bass domain (70Hz～500Hz)
There is the efficiency (referring to arrow C) higher than acoustic characteristic SP1 of the loudspeaker unit of the 1st reference example.This be by be provided with the 2nd connection
Hole 49a and the effect that produces.But, acoustic characteristic SP3 of the loudspeaker unit of the 3rd reference example midrange (500Hz～
1kHz) there is the efficiency (referring to arrow D) lower than acoustic characteristic SP1 of the loudspeaker unit of the 1st reference example.This is because resonance
The generation of pattern and cause.
Fig. 7 illustrates the acoustic characteristic of the loudspeaker unit 1 of the 1st reference example and the 1st embodiment.
In the loudspeaker unit 1 of the 1st embodiment, with respect to the loudspeaker unit of the 1st reference example, it is provided with the 1st intercommunicating pore
17a and the 2nd intercommunicating pore 49a.
As shown in fig. 7, acoustic characteristic SPA of the loudspeaker unit 1 of the 1st embodiment is in middle bass domain (70Hz～500Hz)
There is the efficiency (referring to arrow E) higher than acoustic characteristic SP1 of the loudspeaker unit of the 1st reference example, midrange (500Hz～
Efficiency in 1kHz) declines suppressed (referring to arrow F).That is, according to this structure, the efficiency except middle bass domain carries
Height, can obtain can not producing in the case of only arranging one of the 1st intercommunicating pore 17a and the 2nd intercommunicating pore 49a intercommunicating pore
Effect (inhibition that the efficiency of midrange declines).
Fig. 8 illustrates the acoustic characteristic of the loudspeaker unit of the 1st reference example and the 2nd embodiment.
The loudspeaker unit 1 of the 2nd embodiment, with respect to the loudspeaker unit of the 1st reference example, arrange the 1st intercommunicating pore 17a,
2nd intercommunicating pore 49a, and be configured to the sectional area of the annulus in sound channel LS and be gradually reduced.
As shown in figure 8, acoustic characteristic SPB of the loudspeaker unit 1 of the 2nd embodiment is in middle bass domain (70Hz～500Hz)
There is the efficiency (referring to arrow G) higher than acoustic characteristic SP1 of the loudspeaker unit of the 1st reference example, midrange (500Hz～
1kHz) substantially maintain efficiency (referring to arrow H), in high range (3kHz～20kHz), there is the speaker list than the 1st reference example
The high efficiency (referring to arrow I) of first acoustic characteristic SP1.
It is by being provided with the 1st intercommunicating pore 17a and the 2nd intercommunicating pore that the efficiency of middle bass domain (70Hz～500Hz) improves
49a and the effect that produces.
It is to be produced by being configured to the sectional area of sound channel LS and being gradually reduced that the efficiency of high range (3kHz～20kHz) improves
Effect.
It is by arranging the 1st intercommunicating pore 17a and the 2nd intercommunicating pore that the efficiency of midrange (500Hz～1kHz) declines suppression
49a and be configured to the resultant effect that the sectional area of sound channel LS is gradually reduced and produces.
According to the 1st embodiment, obtain following effect.
The loudspeaker unit 1 of (1) the 1st embodiment has：At least one the 1st intercommunicating pore 17a, by the back side of oscillating plate 20
1st space S A of side connects with internal space S N (back space) of magnetic loop 10；And at least one the 2nd intercommunicating pore 49a, will
2nd space S B of the rear side of oscillating plate 20 connects with side spaces SO of magnetic loop 10.
According to this structure, the 1st space S A of the rear side of oscillating plate 20 and internal space S N of magnetic loop 10 are interconnected,
Thus the space enlargement of the rear side of oscillating plate 20.In addition, the 2nd space S B of the rear side of oscillating plate 20 and the side of magnetic loop 10
Portion's space S O is interconnected, thus the space enlargement of the rear side of oscillating plate 20.Thus, so-called back of the body chamber expands, so speaker
The acoustic characteristic in the middle bass domain of unit 1 is improved.In addition, as described above, the efficiency decline of midrange is suppressed.Separately
Outward, have little to no effect in high range and improve moreover it is possible to obtain a little efficiency.
(2) in above-mentioned loudspeaker unit 1, sound channel LS has：It is arranged at the through hole 45 of housing 40；And be configured at
The connection stem portion being formed between phase plug 30 in through hole 45.The sectional area of the annulus in sound channel LS is from interior side's opening
End 45a is gradually reduced towards outlet opening end 45b.
Sectional area according to the annulus in this structure, with sound channel LS is from interior side opening 45a towards outlet opening end
Sound channel LS that the mode that 45b gradually expands is constituted is compared, and the interior side opening 45a of sound channel LS expands.Therefore, the energy of sound equipment energy
Amount utilization rate improves.In addition, by the sectional area of the annulus in sound channel LS from interior side opening 45a towards outlet opening end
The diminishing composition of 45b, the transmission loss of sound channel LS is suppressed.By these compositions, the efficiency of loudspeaker unit 1 improves.
(3) in above-mentioned loudspeaker unit 1, between lid 41 and magnetic loop 10, configure resinous seal member 49.Vibration
Plate 20 be configured at lid 41 and magnetic loop 10 between and seal member 49 inner side.2nd intercommunicating pore 49a is arranged at sealing as groove
Part 49.
Resinous seal member 49 is easily worked compared with plate 12.Therefore, according to this structure, with the 2nd intercommunicating pore 49a quilt
The situation being arranged at plate 12 is compared, and the production efficiency of loudspeaker unit 1 improves.
In addition, seal member 49 has the 2nd intercommunicating pore 49a constituting as groove, rather than through hole, it is possible to passing through
Resin forming or die casting (die casting) molding.Therefore, the production efficiency contributing to loudspeaker unit 1 improves.
(4) in above-mentioned loudspeaker unit 1, yoke 13 have the backboard portion 14 being connected with the rear surface of Magnetitum 11, along
The surrounding wall portion 16 of the inner peripheral surface of Magnetitum 11 and the front panel portion 17 that the front end of surrounding wall portion 16 is covered.1st intercommunicating pore 17a is by magnetic
The front panel portion 17 of yoke 13 runs through.That is, in the case of the loudspeaker unit 1 of external magnetic type, the 1st intercommunicating pore 17a is arranged at
Yoke 13.
(the 2nd embodiment)
In the 1st embodiment, the loudspeaker unit 1 with the magnetic loop 10 of external magnetic type is described, but the skill of described above
Art is readily adaptable for use in the loudspeaker unit 1 of the magnetic loop 10 with internal magnetic type.Below, to shown in the 1st embodiment
Loudspeaker unit 1 identical constitute give same symbol, this loudspeaker unit 1 is described.
Fig. 9 illustrates the example with the loudspeaker unit 1 of the magnetic loop 10 of internal magnetic type.
This loudspeaker unit 1 possesses magnetic loop 10, oscillating plate 20, voice coil loudspeaker voice coil 21, phase plug 30 and receives these parts
Housing 40.Magnetic loop 10 possesses the Magnetitum 11 of ring-type, is configured at the plate 112 of the round shape of front surface of Magnetitum 11 and with relatively
Form the yoke 113 that the mode of magnetic gap G configures in the outer peripheral face 112c of plate 112.
Yoke 113 has：Backboard portion 113a of ring-type, is configured at the rear surface of Magnetitum 11；And it is outer along Magnetitum 11
Outside wall portions 113b of side face.
It is configured with the inner seal part 114 for connecting phase plug 30 in the front surface central part of plate 112.Inner seal
The diameter of part 114 is less than the diameter of the centre bore 11a of Magnetitum 11.Around the inner seal part 114 of plate 112, along
Circumferencial direction is equally spaced formed with multiple 1st intercommunicating pore 112a.Each 1st intercommunicating pore 112a is by the rear side of internal ring portion 20a
Space (the 1st space S A) connects with internal space S M in Magnetitum 11.1st space S A is at least by the voice coil loudspeaker voice coil with respect to oscillating plate 20
The plate 112 of 21 part 1s, voice coil loudspeaker voice coil 21 and magnetic loop 10 being located at inner side delimited.In addition, internal space S M is to be present in ratio
The concept of the front surface of magnetic loop 10 back space of side rearward.
Lid 41 has structure in a same manner as in the first embodiment, has central part 42, circumferential part 43 and is arranged at circumference
The peripheral part 44 of the surrounding in portion 43.
The seal member 49 of ring-type is configured between the circumferential part 43 of lid 41 and outside wall portions 113b of yoke 113.Sealing
Part 49 is by resin formation.
In addition, between outside wall portions 113b of seal member 49 and yoke 113, being equally spaced many in circumferencial direction
Individual 2nd intercommunicating pore 49a.Each 2nd intercommunicating pore 49a radially extending along outside wall portions 113b of seal member 49 and yoke 113.
For example, the groove that each 2nd intercommunicating pore 49a is formed as the part excision by the face of the yoke 113 of seal member 49 is constituted.Respectively
The space (the 2nd space S B) of the rear side of outer portion 20b is connected by the 2nd intercommunicating pore 49a with side spaces SO in housing 40.The
2 space S B delimited by part 2, voice coil loudspeaker voice coil 21 and the yoke 113 that the voice coil loudspeaker voice coil 21 with respect at least oscillating plate 20 is located at outside.
In addition, composition in addition is identical with the loudspeaker unit 1 shown in the 1st embodiment.
As described above, in the case of the loudspeaker unit 1 of internal magnetic type, different from the loudspeaker unit 1 of external magnetic type, each
1 intercommunicating pore 112a is arranged at plate 112.In the same manner as the loudspeaker unit 1 of external magnetic type, each 2nd intercommunicating pore 49a is in seal member 49
On as groove setting.According to this composition, the effect based on above-mentioned (1) of explanation in the 1st embodiment can be obtained.
In addition, in the loudspeaker unit 1 of the magnetic loop 10 with above-mentioned internal magnetic type, being gradually reduced with the sectional area of sound channel LS
Mode constitute sound channel LS such that it is able to obtain the 1st embodiment explanation above-mentioned (2) effect.
(other embodiment)
In the 1st embodiment, front panel portion 17 and connecting portion 18 form as one, and they are constituted as individual components.
In addition, in such a situation it is preferred to detached connecting portion 18 and intervening components 19 (seal member) form as one.According to this
Constitute, the structure of yoke 13 simplifies and number of components does not also increase, so production efficiency improves.
Sound channel LS shown in 1st and the 2nd embodiment is an example, the structure not limited to this of sound channel LS.For example,
Sound channel LS is configured to become ring-type from the interior side opening 45a of sound channel LS to outlet opening end 45b.In addition, circular cylinder shaped portion
It is configured to gradually expand towards outlet opening end 45b sectional area, alternatively, it is also possible to be configured to towards outlet opening end 45b
Sectional area is gradually reduced.
In the 1st and the 2nd embodiment, each 2nd intercommunicating pore 49a is configured between seal member 49 and plate 12, and
Each 2nd intercommunicating pore 49a is constituted as the groove being formed by the part excision by seal member 49, but each 2nd intercommunicating pore
The composition not limited to this of 49a.For example, each 2nd intercommunicating pore 49a can be constituted as the through hole running through seal member 49.
Technology shown in 1st and the 2nd embodiment is applied to speaker.
This speaker possesses above-mentioned loudspeaker unit 1, thus the efficiency in middle bass domain improves.
In the 1st and the 2nd embodiment, loudspeaker unit 1 possesses multiple 1st intercommunicating pore 17a and the multiple 2nd even
Through hole 49a, but as long as possess at least one the 1st intercommunicating pore 17a and at least one the 2nd intercommunicating pore 49a, the 1st intercommunicating pore 17a
Quantity and the quantity of the 2nd intercommunicating pore 49a be not particularly limited.
Description of reference numerals
1 ... loudspeaker unit, 10 ... magnetic loops, 11 ... Magnetitums, 11a ... centre bore, 12 ... plates, 12a ... centre bore,
12b ... inner peripheral surface, 13 ... yokes, 14 ... backboard portions, 15 ... central parts, 15a ... outer peripheral face, 16 ... surrounding wall portion, 17 ... front panel portion,
17a ... the 1st intercommunicating pore, 18 ... connecting portions, 19 ... intervening components, 20 ... oscillating plates, 20a ... internal ring portion, 20b ... outer portion,
21 ... voice coil loudspeaker voice coils, 30 ... phase plugs, 31 ... base portions, 32 ... main parts, 32a ... side, 33 ... bolts, 40 ... housings, 41 ... lid,
42 ... central parts, 43 ... circumferential parts, 44 ... peripheral parts, 45 ... through holes, 45a ... interior side opening, 45b ... outlet opening end,
46 ... housing body, 47 ... side walls, 48 ... diapires, 49 ... seal members, 49a ... the 2nd intercommunicating pore, 112 ... plates, 112a ... the 1st
Intercommunicating pore, 112c ... outer peripheral face, 113 ... yokes, 113a ... backboard portion, 113b ... outside wall portions, 114 ... inner seal parts.
Claims (8)
1. a kind of loudspeaker unit, has：The oscillating plate of ring-type；The voice coil loudspeaker voice coil of ring-type, the circumferencial direction along described oscillating plate sets
It is placed in the radial direction middle part of described oscillating plate；Magnetic loop, has the magnetic gap inserted for described voice coil loudspeaker voice coil；And housing, have by
The sound guidance sending from described oscillating plate to outside sound channel, wherein,
At least it is located at part 1, described voice coil loudspeaker voice coil and the described magnetic loop of inner side by the described voice coil loudspeaker voice coil with respect to described oscillating plate
Delimit the 1st space,
At least it is located at part 2, described voice coil loudspeaker voice coil and the described magnetic loop in outside by the described voice coil loudspeaker voice coil with respect to described oscillating plate
Delimit the 2nd space,
Described loudspeaker unit has at least one the 1st intercommunicating pore and at least one the 2nd intercommunicating pore, and at least one the 1st intercommunicating pore is by institute
State the 1st space and connect with the back space at rear portion being located at described magnetic loop, at least one the 2nd intercommunicating pore by described 2nd space with
Side spaces connection positioned at the sidepiece of described magnetic loop.
2. loudspeaker unit according to claim 1,
Described loudspeaker unit is also equipped with the phase plug being arranged on described oscillating plate,
Described sound channel includes the annulus being formed between described housing and described phase plug,
The annulus of described sound channel has from interior side's opening towards the diminishing sectional area in outlet opening end.
3. the loudspeaker unit according to claim 1 or claim 2,
Described housing includes：Lid, has described sound channel；And housing body, receive described magnetic loop,
Described loudspeaker unit possesses the resinous seal member being arranged between described lid and described magnetic loop,
Described oscillating plate is configured at the inner side of described seal member between described lid and described magnetic loop,
Described at least one the 2nd intercommunicating pore includes groove or the through hole being formed at described seal member.
4. the loudspeaker unit described in any one according to claim 1～claim 3,
Described magnetic loop includes：The Magnetitum of ring-type, is configured at the radial outside leaning on described oscillating plate than described voice coil loudspeaker voice coil；Ring-type
Plate, is arranged on the face opposed with described oscillating plate of described Magnetitum；And yoke, formed with the inner peripheral surface with respect to described plate
The mode of described magnetic gap configures,
Described yoke includes：It is arranged at the backboard portion on the face positioned at described plate opposition side of described Magnetitum；Along described Magnetitum
Inner peripheral surface surrounding wall portion；And the front panel portion by the front end covering of described surrounding wall portion,
The described front panel portion of described yoke is run through by described 1st intercommunicating pore.
5. the loudspeaker unit described in any one according to claim 1～claim 3,
Described magnetic loop includes：The Magnetitum of ring-type, is configured at the radially inner side leaning on described oscillating plate than described voice coil loudspeaker voice coil；Round shape
Plate, is arranged on the face opposed with described oscillating plate of described Magnetitum；And yoke, be arranged at described Magnetitum positioned at described
On the face of the contrary side of plate, and configure in the way of the outer peripheral face with respect to described plate forms described magnetic gap,
Described plate is run through by described 1st intercommunicating pore.
6. loudspeaker unit according to claim 1,
Described housing receives described oscillating plate, described voice coil loudspeaker voice coil and described magnetic loop,
Described back space at least delimited by the part and described housing of the described oscillating plate opposition side of described magnetic loop,
Described side spaces at least delimited by the sidepiece and described housing of described magnetic loop.
7. loudspeaker unit according to claim 6, wherein,
Described loudspeaker unit possesses seal member, and described seal member is arranged between described magnetic loop and described housing,
To separate between described 2nd space and described side spaces,
Described at least one the 2nd intercommunicating pore includes being formed in the way of to connect described 2nd space with described side spaces described
The groove of seal member or through hole.
8. a kind of speaker, possesses the loudspeaker unit described in any one of claim 1～claim 7.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2014/067007 WO2015198454A1 (en) | 2014-06-26 | 2014-06-26 | Speaker unit and speaker comprising that speaker unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106465018A true CN106465018A (en) | 2017-02-22 |
| CN106465018B CN106465018B (en) | 2019-07-19 |
Family
ID=54937581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480079606.7A Active CN106465018B (en) | 2014-06-26 | 2014-06-26 | Loudspeaker unit and the loudspeaker for having the loudspeaker unit |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP6397494B2 (en) |
| CN (1) | CN106465018B (en) |
| WO (1) | WO2015198454A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131977A (en) * | 2020-03-05 | 2020-05-08 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USRE49437E1 (en) | 2014-09-30 | 2023-02-28 | Apple Inc. | Audio driver and power supply unit architecture |
| JP6526185B2 (en) | 2014-09-30 | 2019-06-05 | アップル インコーポレイテッドＡｐｐｌｅ Ｉｎｃ． | Loudspeaker with reduced audio coloration caused by surface reflections |
| US10257608B2 (en) * | 2016-09-23 | 2019-04-09 | Apple Inc. | Subwoofer with multi-lobe magnet |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62210800A (en) * | 1986-03-12 | 1987-09-16 | Fumio Shintaku | Horn speaker |
| JPH02133090U (en) * | 1989-04-05 | 1990-11-05 | ||
| CN1525790A (en) * | 2003-02-28 | 2004-09-01 | 星精密株式会社 | Electroacoustic transducer |
| CN103167388A (en) * | 2011-12-19 | 2013-06-19 | 莫列斯公司 | Loudspeaker device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5877979U (en) * | 1981-11-24 | 1983-05-26 | ソニー株式会社 | microphone |
| JPS58142694A (en) * | 1982-02-17 | 1983-08-24 | Toa Tokushu Denki Kk | Structure of speaker driving part |
| JPH04329799A (en) * | 1991-05-02 | 1992-11-18 | Matsushita Electric Ind Co Ltd | Horn speaker |
| JP4042732B2 (en) * | 2004-09-28 | 2008-02-06 | オンキヨー株式会社 | Ring type speaker |
-
2014
- 2014-06-26 JP JP2016528945A patent/JP6397494B2/en active Active
- 2014-06-26 CN CN201480079606.7A patent/CN106465018B/en active Active
- 2014-06-26 WO PCT/JP2014/067007 patent/WO2015198454A1/en active Application Filing
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62210800A (en) * | 1986-03-12 | 1987-09-16 | Fumio Shintaku | Horn speaker |
| JPH02133090U (en) * | 1989-04-05 | 1990-11-05 | ||
| CN1525790A (en) * | 2003-02-28 | 2004-09-01 | 星精密株式会社 | Electroacoustic transducer |
| CN103167388A (en) * | 2011-12-19 | 2013-06-19 | 莫列斯公司 | Loudspeaker device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111131977A (en) * | 2020-03-05 | 2020-05-08 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
| CN111131977B (en) * | 2020-03-05 | 2021-02-26 | 瑞声科技(新加坡)有限公司 | Loudspeaker |
Also Published As
| Publication number | Publication date |
|---|---|
| JPWO2015198454A1 (en) | 2017-04-20 |
| CN106465018B (en) | 2019-07-19 |
| WO2015198454A1 (en) | 2015-12-30 |
| JP6397494B2 (en) | 2018-09-26 |
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