CN205812375U - Double magnetic gap magnetic circuit systems and the speaker with this pair of magnetic gap magnetic circuit system - Google Patents
Double magnetic gap magnetic circuit systems and the speaker with this pair of magnetic gap magnetic circuit system Download PDFInfo
- Publication number
- CN205812375U CN205812375U CN201620422615.8U CN201620422615U CN205812375U CN 205812375 U CN205812375 U CN 205812375U CN 201620422615 U CN201620422615 U CN 201620422615U CN 205812375 U CN205812375 U CN 205812375U
- Authority
- CN
- China
- Prior art keywords
- voice coil
- annular
- magnetic gap
- magnetic
- coil loudspeaker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn - After Issue
Links
Landscapes
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The utility model discloses a kind of pair of magnetic gap magnetic circuit system and there is the speaker of this pair of magnetic gap magnetic circuit system.This pair of magnetic gap magnetic circuit system includes: T ferrum, annular magnet, first annular washer, annular support member and the second annular washer；Annular magnet and annular support member are arranged in the circular bottom plate of T ferrum, and first annular washer is arranged on annular magnet；Second annular washer is arranged on annular support member；First annular washer and the second annular washer constitute the first magnetic gap, and the second annular washer constitutes the second magnetic gap with post core sidewall, and the first magnetic gap is for suspension the first voice coil loudspeaker voice coil, and the second magnetic gap is for suspension the second voice coil loudspeaker voice coil.This utility model, by reducing the mutual induction electromotive force of voice coil loudspeaker voice coil, improves high frequency playback distortion, and the introducing of annular support member can reduce the change of voice coil loudspeaker voice coil nonlinear inductance amount, reduces harmonic distortion.
Description
Technical field
This utility model relates to electroacoustic techniques field, particularly to a kind of double magnetic gap magnetic circuit systems with have this
The speaker of double magnetic gap magnetic circuit systems.
Background technology
The common magnetic circuit of loudspeaker is as it is shown in figure 1, Fig. 1 is traditional magnetic circuit of loudspeaker section
Schematic diagram, the magnetic circuit system in Fig. 1 includes: T ferrum 1 ', Magnet 2 ', washer 3 ' and voice coil loudspeaker voice coil 4 '；T
Ferrum 1 ', Magnet 2 ' and washer 3 ' form a toroid, and voice coil loudspeaker voice coil 4 ' hangs on by washer 3 ' and T ferrum
In the 1 ' magnetic gap constituted；After voice coil loudspeaker voice coil 4 ' energising, stress in magnetic field, drive speaker vibration system, from
And produce sound.
The above-mentioned magnetic circuit of loudspeaker at least has the drawback that
One, from Lenz's law, when electric current drives voice coil vibrations, can produce reaction in voice coil loudspeaker voice coil electronic
Gesture hinders the change of magnetic flux；
Its two, the self-inductance of voice coil loudspeaker voice coil is nonlinear change with frequency, when speaker operation is at high frequency, sound
The self-induction enclosing self is excessive, and the faradic current of generation is relatively big, has a negative impact speaker operation, leads
Cause higher frequency response impaired.
Above two point defects can cause the anti-value of speaker resistor at f > (fn is the frequency that impedance minimum is corresponding to fn
Rate value) time, increase and dull rapid increase with frequency, cause harmonic distortion.Therefore, it is necessary to propose
A kind of improvement is with the defect overcoming conventional loudspeakers magnetic circuit system.
Utility model content
In view of the above problems, this utility model provides a kind of double magnetic gap magnetic circuit system and has this pair of magnetic gap magnetic
The speaker of road system, to improve the acoustical behavior of speaker.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
On the one hand, this utility model provides a kind of double magnetic gap magnetic circuit system, including: T ferrum, annular magnetic
Ferrum 2 and first annular washer 41, T ferrum includes circular bottom plate 11 and vertical with circular bottom plate 11 center
Post core 12, annular magnet 2 and first annular washer 41 concentric are around post core 12, and annular magnet 2
Being arranged in circular bottom plate 11, first annular washer 41 is arranged on annular magnet 2；Double magnetic gap magnetic circuits
System also includes: the annular support member 3 of concentric cincture post core 12 and the second annular washer 42；
Annular support member 3 is arranged in the circular bottom plate 11 between post core 12 and annular magnet 2, and ring
There is between shape Magnet 2 medial wall and annular support member 3 lateral wall gap, annular support member 3 medial wall
And between post core 12 sidewall, there is gap；Second annular washer 42 is arranged on annular support member 3；
First annular washer 41 and the second annular washer 42 constitute the first magnetic gap 51, the second annular washer 42
Constituting the second magnetic gap 52 with post core 12 sidewall, the first magnetic gap 51 is for suspension the first voice coil loudspeaker voice coil 61, the second magnetic
Gap 52 is for suspension the second voice coil loudspeaker voice coil 62.
Preferably, described post core 12 is provided centrally with running through the through hole 111 of circular bottom plate 11.
Preferably, annular support member 3 is non-magnetic aluminum ring or copper ring.
Preferably, circular bottom plate 11 lower surface is the slope that height center, edge is low.
On the other hand, this utility model additionally provides a kind of speaker, including: vibrational system and above-mentioned pair
Magnetic gap magnetic circuit system；
Vibrational system includes first voice coil loudspeaker voice coil the 61, second voice coil loudspeaker voice coil 62, outer cone 71 and interior cone 72；
First voice coil loudspeaker voice coil the 61, second voice coil loudspeaker voice coil 62 is suspended in the first magnetic gap of described pair of magnetic gap magnetic circuit system respectively
51 and second in magnetic gap 52, and the first voice coil loudspeaker voice coil 61 connects outer cone 71, and the second voice coil loudspeaker voice coil 62 connects interior paper
Basin (72), drives outer cone 71 and interior cone 72 synchronous vibration for correspondence.
Preferably, the first voice coil loudspeaker voice coil 61 and the second voice coil loudspeaker voice coil 62 are coiling in the same direction, the voice coil loudspeaker voice coil of different core number.
Preferably, the winding diameter of the first voice coil loudspeaker voice coil 61 is more than the winding diameter of the second voice coil loudspeaker voice coil 62.
Preferably, speaker also includes support auxiliary system, and support auxiliary system includes: frame 8, bullet
Ripple 9 and dust cap 10, play ripple 9 and dust cap 10 is arranged in frame 8；
Play ripple 9, support for providing for the balance of vibrational system, and control the pliable of vibrational system；
Dust cap 10, is used for preventing dust from entering double magnetic gap magnetic circuit system, and strengthens the firm of interior cone 72
Property.
This utility model embodiment provides the benefit that: this utility model is at existing annular magnet and first
On the basis of annular washer, by setting up annular support member and the second annular washer so that first annular washer
Constituting the first magnetic gap with the second annular washer, the second annular washer constitutes the second magnetic gap with post core sidewall, from
And constitute double magnetic gap magnetic circuit system.Compared to prior art, owing to this utility model is suspended in two magnetic gaps
Two interior voice coil loudspeaker voice coils form short circuit metal ring in the upper end of T iron prop core, it is thus possible to reduce the mutual inductance of voice coil loudspeaker voice coil
Electromotive force, improves high frequency playback distortion；And the introducing of annular support member can reduce voice coil loudspeaker voice coil nonlinear inductance
The change of amount, thus reduce harmonic distortion；Additionally, double magnetic gap double voice coil structures can also significantly improve magnetic
Field utilization rate, it is provided that flexile voice coil loudspeaker voice coil compound mode.
Accompanying drawing explanation
Fig. 1 is traditional magnetic circuit of loudspeaker generalized section；
Double magnetic gap magnetic circuit system generalized sections that Fig. 2 provides for embodiment one；
Fig. 3 is the partial enlarged drawing in Fig. 2 at A；
The speaker generalized section that Fig. 4 provides for embodiment two；
In figure: 11, circular bottom plate；111, through hole；12, post core；2, annular magnet；3, annular
Support member；41, first annular washer；42, the second annular washer；51, the first magnetic gap；52, the second magnetic
Gap；61, the first voice coil loudspeaker voice coil；62, the second voice coil loudspeaker voice coil；71, outer cone；72, interior cone；8, frame；9、
Play ripple；10, dust cap.
Detailed description of the invention
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with accompanying drawing pair
This utility model embodiment is described in further detail.
Embodiment one:
Double magnetic gap magnetic circuit system generalized sections that Fig. 2 provides for the present embodiment, Fig. 3 is in Fig. 2 at A
Partial enlarged drawing.
As Fig. 2 and Fig. 3 jointly shown in, the double magnetic gap magnetic circuit systems in the present embodiment, including: T ferrum,
Annular magnet 2 and first annular washer 41, T ferrum include circular bottom plate 11 and with circular bottom plate 11 center
Vertical post core 12, annular magnet 2 and first annular washer 41 concentric are around post core 12, and annular
Magnet 2 is arranged in circular bottom plate 11, and first annular washer 41 is arranged on annular magnet 2.
Double magnetic gap magnetic circuit systems also include: concentric is annular around the annular support member 3 and second of post core 12
Washer 42, it is preferable that annular support member 3 is non-magnetic aluminum ring or copper ring.
Annular support member 3 is arranged in the circular bottom plate 11 between post core 12 and annular magnet 2, and ring
There is between shape Magnet 2 medial wall and annular support member 3 lateral wall gap, annular support member 3 medial wall
And between post core 12 sidewall, there is gap；Second annular washer 42 is arranged on annular support member 3；I.e.
On the one hand annular support member for supporting the second annular washer, makes the second annular washer and first annular washer
Constitute the first magnetic gap, constitute the second magnetic gap with post core sidewall；On the other hand, substantial amounts of simulating, verifying shows,
Annular support member is set to non-magnetic copper ring or aluminum ring can significantly inhibit the nonlinear change of voice coil loudspeaker voice coil.
First annular washer 41 and the second annular washer 42 constitute the first magnetic gap 51, the second annular washer 42
Constituting the second magnetic gap 52 with post core 12 sidewall, the first magnetic gap 51 is for suspension the first voice coil loudspeaker voice coil 61, the second magnetic
Gap 52 is for suspension the second voice coil loudspeaker voice coil 62.
It should be noted that owing to the concrete size of magnetic gap designs ginseng with voice coil loudspeaker voice coil core number, the number of plies, line footpath etc.
Number is relevant, and in actual applications, the concrete size of two magnetic gaps needs the design according to speaker to require certainly
Fixed；It is to be understood that the void pitch of the first magnetic gap 51 can be with the void pitch phase of the second magnetic gap 52
Deng, the void pitch of the first magnetic gap 51 can also be more than or less than the void pitch of the second magnetic gap 52.
The present embodiment is preferably provided centrally with running through the through hole 111 of circular bottom plate 11 at post core 12, makes
Double magnetic gap magnetic circuit system air pressure inside are consistent with ambient pressure, both ensured above cone with cone below gas
Pressure is consistent, it is to avoid the excessive vibration downward to cone of air pressure below cone produces resistance；In addition the present embodiment
The through hole 111 arranged also helps heat radiation, prevents speaker excessive due to power, burns loudspeaker assembly,
Ensure the acoustical behavior of speaker.
With reference to shown in Fig. 2, for improving the magnetic conductivity of system, preferably along circular bottom plate 11 lower surface in
The ramp structure that height center, edge is low, effectively turns on the magnetic induction line of annular magnet, improves magnetic field utilization rate.
The present embodiment is by setting gradually the annular brace coaxial with T iron prop core in the circular bottom plate of T ferrum
Part and annular magnet, make the annular washer being arranged on annular support member and post core constitute the second magnetic gap, with
And make the annular washer being arranged on annular magnet and the annular washer that is arranged on annular support member constitutes the
One magnetic gap, thus constitute double magnetic gap magnetic circuit system.
Double magnetic gap magnetic circuit systems in the present embodiment compared to magnetic circuit system of the prior art at least have with
Lower advantage:
One, the double voice coil being arranged in two magnetic gaps forms short circuit metal ring in the post core upper end of T ferrum,
Mutual induction electromotive force can be reduced, improve high frequency playback distortion；I.e. it is passed through audio-frequency electric at double magnetic gap magnetic circuit systems
During stream, the first voice coil loudspeaker voice coil being arranged in the first magnetic gap is equivalent to by the second voice coil loudspeaker voice coil being arranged in the second magnetic gap
Guan Bi becket, same, the first voice coil loudspeaker voice coil being arranged in the first magnetic gap is to being arranged in the second magnetic gap
Second voice coil loudspeaker voice coil is equivalent to close becket, and this structure can efficiently reduce the reaction electromotive force of two voice coil loudspeaker voice coils,
Thus reduce the high frequency playback distortion of speaker.
Two, the introducing of annular support member can reduce the change of nonlinear inductance amount of voice coil loudspeaker voice coil, reduces humorous
Wave distortion；Increase owing to the inductance value of voice coil loudspeaker voice coil increases with frequency, add after annular support member, voice coil loudspeaker voice coil and
Mutual inductance occurring between annular support member, finds through simulating, verifying, the increase amplitude of voice coil loudspeaker voice coil inductance value is by significantly
Weaken, therefore decrease the nonlinear change of voice coil loudspeaker voice coil.
Its three, double magnetic gap double voice coil structures significantly improve magnetic field utilization rate；Owing to speaker principle is sound
Circle movement under force in magnetic field drives speaker vibration system sounding, and the present embodiment is by a magnetic circuit system
System adds two voice coil loudspeaker voice coils, is equivalent to a magnetic field to a certain extent and is utilized twice simultaneously, for vibration
System provides suitable 2 times of driving forces, thus substantially increases the utilization rate in magnetic field.
Its four, the compound mode of two voice coil loudspeaker voice coils is versatile and flexible；I.e. can by change voice coil loudspeaker voice coil material, core number,
Line footpath, winding mode or voice coil loudspeaker voice coil connected mode etc. provide voice coil loudspeaker voice coil compound mode flexibly.
Embodiment two
Identical with embodiment one technology design, present embodiments provides one and has this pair of magnetic gap magnetic circuit system
The speaker of system.
As shown in Figure 4, the speaker generalized section that Fig. 4 provides for the present embodiment, such as raising in Fig. 4
Sound device includes: vibrational system and above-mentioned pair of magnetic gap magnetic circuit system；
Vibrational system includes first voice coil loudspeaker voice coil the 61, second voice coil loudspeaker voice coil 62, outer cone 71 and interior cone 72；
First voice coil loudspeaker voice coil the 61, second voice coil loudspeaker voice coil 62 is suspended in the first magnetic gap 51 and of double magnetic gap magnetic circuit system respectively
In second magnetic gap 52, and the first voice coil loudspeaker voice coil 61 connects outer cone 71, and the second voice coil loudspeaker voice coil 62 connects interior cone 72,
First voice coil loudspeaker voice coil 61 and the second voice coil loudspeaker voice coil 62 drive outer cone 71 and interior cone 72 synchronous vibration for correspondence.
It should be noted that owing to winding method and the magnetic direction of voice coil loudspeaker voice coil together decide on access tone currents
Time, the motion mode of voice coil loudspeaker voice coil, for ensureing that two voice coil loudspeaker voice coils move under same current drives in the same direction, it is desirable to this
Two voice coil loudspeaker voice coils in embodiment, the i.e. first voice coil loudspeaker voice coil 61 and the second voice coil loudspeaker voice coil 62 coiling in the same direction；And due to two
Voice coil loudspeaker voice coil coaxial placement, therefore the first voice coil loudspeaker voice coil 61 in the present embodiment is inevitable with the second voice coil loudspeaker voice coil 62 core number different.
And, in order to coordinate the structure of magnetic circuit system, the winding diameter of the first voice coil loudspeaker voice coil 61 is set more than the second voice coil loudspeaker voice coil
The winding diameter of 62.
As shown in Figure 4, this speaker also includes support auxiliary system, and support auxiliary system includes: frame
8, play ripple 9 and dust cap 10, play ripple 9 and dust cap 10 is arranged in frame 8；
Play ripple 9, support for providing for the balance of vibrational system, and control the pliable of vibrational system；
Dust cap 10, is used for preventing dust from entering double magnetic gap magnetic circuit system, and strengthens the firm of interior cone 72
Property.
In sum, this utility model provides a kind of double magnetic gap magnetic circuit system and has this pair of magnetic gap magnetic circuit
The speaker of system, by the basis of existing annular magnet and first annular washer, by setting up ring
Shape support member and the second annular washer so that first annular washer and the second annular washer constitute the first magnetic gap,
Second annular washer and described post core sidewall constitute the second magnetic gap, thus constitute double magnetic gap magnetic circuit system.Phase
Than in prior art, two voice coil loudspeaker voice coils being suspended in two magnetic gaps due to this utility model are at T iron prop core
Upper end forms short circuit metal ring, it is thus possible to reduces the mutual induction electromotive force of voice coil loudspeaker voice coil, improves high frequency playback distortion；
And the introducing of annular support member can reduce the change of voice coil loudspeaker voice coil nonlinear inductance amount, thus reduce harmonic distortion；
Additionally, double magnetic gap double voice coil structures can also significantly improve magnetic field utilization rate, it is provided that flexile voice coil loudspeaker voice coil
Compound mode.
For the ease of clearly describing the technical scheme of this utility model embodiment, in the embodiment of utility model
In, have employed the printed words such as " first ", " second " to function and the essentially identical identical entry of effect or similar item
Make a distinction, it will be appreciated by those skilled in the art that the printed words such as " first ", " second " not to quantity and are held
Row order is defined.
The foregoing is only preferred embodiment of the present utility model, be not intended to limit this utility model
Protection domain.All made within spirit of the present utility model and principle any amendment, equivalent,
Improve, be all contained in protection domain of the present utility model.
Claims (8)
1. double magnetic gap magnetic circuit systems, including: T ferrum, annular magnet (2) and first annular washer
(41), described T ferrum includes circular bottom plate (11) and vertical with described circular bottom plate (11) center
Post core (12), annular magnet (2) and first annular washer (41) concentric cincture post core (12), and
Annular magnet (2) is arranged in circular bottom plate (11), and first annular washer (41) is arranged on annular magnetic
On ferrum (2)；It is characterized in that, described pair of magnetic gap magnetic circuit system also includes: concentric is around post core (12)
Annular support member (3) and second annular washer (42)；
Described annular support member (3) is arranged on the circular base between post core (12) and annular magnet (2)
On plate (11), and between having between annular magnet (2) medial wall and annular support member (3) lateral wall
Gap, has gap between annular support member (3) medial wall and post core (12) sidewall；Described second annular
Washer (42) is arranged on annular support member (3)；
Described first annular washer (41) constitutes the first magnetic gap (51) with described second annular washer (42),
Described second annular washer (42) constitutes the second magnetic gap (52) with described post core (12) sidewall, and described the
One magnetic gap (51) is for suspension the first voice coil loudspeaker voice coil (61), and described second magnetic gap (52) is for suspension the second sound
Circle (62).
The most according to claim 1 pair of magnetic gap magnetic circuit system, it is characterised in that described post core (12)
It is provided centrally with running through the through hole (111) of circular bottom plate (11).
The most according to claim 1 pair of magnetic gap magnetic circuit system, it is characterised in that described annular brace
Part (3) is non-magnetic aluminum ring or copper ring.
4. according to the double magnetic gap magnetic circuit systems described in any one of claims 1 to 3, it is characterised in that institute
Stating circular bottom plate (11) lower surface is the low ramp structure in height center, edge.
5. a speaker, it is characterised in that including: vibrational system and any one of claim 1-4 institute
The double magnetic gap magnetic circuit systems stated；
Described vibrational system includes the first voice coil loudspeaker voice coil (61), the second voice coil loudspeaker voice coil (62), outer cone (71) and interior
Cone (72)；
Described first voice coil loudspeaker voice coil (61), the second voice coil loudspeaker voice coil (62) are suspended in described pair of magnetic gap magnetic circuit system respectively
In first magnetic gap (51) and the second magnetic gap (52), and the first voice coil loudspeaker voice coil (61) connects outer cone (71),
Second voice coil loudspeaker voice coil (62) connect in cone (72), drive described outer cone (71) and described interior for correspondence
Cone (72) synchronous vibration.
Speaker the most according to claim 5, it is characterised in that described first voice coil loudspeaker voice coil (61) and
Described second voice coil loudspeaker voice coil (62) is coiling in the same direction, the voice coil loudspeaker voice coil of different core number.
Speaker the most according to claim 6, it is characterised in that described first voice coil loudspeaker voice coil (61)
Winding diameter is more than the winding diameter of described second voice coil loudspeaker voice coil (62).
8. according to the speaker described in any one of claim 5 to 7, it is characterised in that described speaker
Also include that support auxiliary system, described support auxiliary system include: frame (8), play ripple (9) and dust-proof
Cap (10), described bullet ripple (9) and described dust cap (10) are arranged in described frame (8)；
Described bullet ripple (9), supports for providing for the balance of vibrational system, and controls the suitable of vibrational system
Property；
Described dust cap (10), is used for preventing dust from entering described pair of magnetic gap magnetic circuit system, and strengthens described
The rigidity of interior cone (72).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620422615.8U CN205812375U (en) | 2016-05-10 | 2016-05-10 | Double magnetic gap magnetic circuit systems and the speaker with this pair of magnetic gap magnetic circuit system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620422615.8U CN205812375U (en) | 2016-05-10 | 2016-05-10 | Double magnetic gap magnetic circuit systems and the speaker with this pair of magnetic gap magnetic circuit system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205812375U true CN205812375U (en) | 2016-12-14 |
Family
ID=57499288
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620422615.8U Withdrawn - After Issue CN205812375U (en) | 2016-05-10 | 2016-05-10 | Double magnetic gap magnetic circuit systems and the speaker with this pair of magnetic gap magnetic circuit system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205812375U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848064A (en) * | 2016-05-10 | 2016-08-10 | 青岛歌尔声学科技有限公司 | Dual-magnetic-gap magnetic path system and loudspeaker with same |
| CN108737938A (en) * | 2017-04-20 | 2018-11-02 | 深圳市三诺数字科技有限公司 | A kind of dual-drive speaker device |
-
2016
- 2016-05-10 CN CN201620422615.8U patent/CN205812375U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105848064A (en) * | 2016-05-10 | 2016-08-10 | 青岛歌尔声学科技有限公司 | Dual-magnetic-gap magnetic path system and loudspeaker with same |
| CN105848064B (en) * | 2016-05-10 | 2019-06-04 | 青岛歌尔声学科技有限公司 | Double magnetic gap magnetic circuit systems and loudspeaker with double magnetic gap magnetic circuit systems |
| CN108737938A (en) * | 2017-04-20 | 2018-11-02 | 深圳市三诺数字科技有限公司 | A kind of dual-drive speaker device |
| CN108737938B (en) * | 2017-04-20 | 2024-01-23 | 深圳市三诺数字科技有限公司 | Dual-drive loudspeaker device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204465853U (en) | Minitype speaker device and mobile terminal | |
| CN105848064A (en) | Dual-magnetic-gap magnetic path system and loudspeaker with same | |
| CN107820169A (en) | Loudspeaker and the method for improving loudspeaker sensitivity | |
| CN101480067A (en) | Speaker | |
| CN105187999A (en) | Novel high-fidelity low-medium-high frequency loudspeaker with sensitive transient response | |
| CN103686558A (en) | Loudspeaker | |
| CN103281658B (en) | Magnetic moves loud speaker | |
| CN205812375U (en) | Double magnetic gap magnetic circuit systems and the speaker with this pair of magnetic gap magnetic circuit system | |
| CN209462600U (en) | Loudspeaker and earphone | |
| CN107509142A (en) | A kind of multifunction speaker | |
| CN203015108U (en) | Novel loudspeaker | |
| CN203279160U (en) | Magnetomotive loudspeaker | |
| CN204014046U (en) | Loud speaker | |
| CN202334872U (en) | Speaker | |
| CN204031441U (en) | Loud speaker | |
| CN203590449U (en) | Loudspeaker device | |
| CN208798145U (en) | A kind of simple coaxial horn of structure | |
| CN212324357U (en) | Skeleton voice coil and electroacoustic conversion device | |
| CN205670838U (en) | The double Magnet speaker of symmetrical expression | |
| CN205726355U (en) | Magnetic circuit system and speaker | |
| CN205092964U (en) | Loudspeaker | |
| CN206164828U (en) | Crossing pair of vibration basin speaker | |
| CN202143203U (en) | Loudspeaker voice coil | |
| CN203872350U (en) | Flat type loudspeaker | |
| CN101626536A (en) | Open magnetic circuit electric loudspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161214 Effective date of abandoning: 20190604 |
|
| AV01 | Patent right actively abandoned |