CN114449420B - Speaker and electronic device - Google Patents
Speaker and electronic device Download PDFInfo
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- CN114449420B CN114449420B CN202210114189.1A CN202210114189A CN114449420B CN 114449420 B CN114449420 B CN 114449420B CN 202210114189 A CN202210114189 A CN 202210114189A CN 114449420 B CN114449420 B CN 114449420B
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- 230000000903 blocking effect Effects 0.000 claims description 18
- 238000004804 winding Methods 0.000 claims description 10
- 230000005855 radiation Effects 0.000 description 14
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 230000003190 augmentative effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005237 high-frequency sound signal Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 230000005238 low-frequency sound signal Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
- H04R9/02—Details
- H04R9/025—Magnetic circuit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
- H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
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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
- H04R9/06—Loudspeakers
- H04R9/063—Loudspeakers using a plurality of acoustic drivers
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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a loudspeaker and an electronic device. The loudspeaker comprises a basin frame, a magnetic circuit system, a first vibration system and a second vibration system; the magnetic circuit system is fixed in the basin frame, a first magnetic gap and a second magnetic gap are formed at one end face of the magnetic circuit system, a third magnetic gap is formed at the other end face of the magnetic circuit system, and the second magnetic gap is opposite to and communicated with the third magnetic gap; the first vibration system is provided with a first vibrating diaphragm and a first voice coil, the first vibrating diaphragm is covered on the basin frame and is opposite to the first magnetic gap, and the first voice coil is connected with the first vibrating diaphragm and is inserted into the first magnetic gap; the second vibration system is provided with a second vibrating diaphragm and a second voice coil, the second vibrating diaphragm is covered on the basin frame and is opposite to the third magnetic gap, and the second voice coil is connected with the second vibrating diaphragm and is simultaneously inserted into the second magnetic gap and the third magnetic gap; when the second voice coil is electrified, the second magnetic gap and the third magnetic gap apply acting force in the same direction to the second voice coil. The invention can better meet the requirements of various small electronic devices on sound quality.
Description
Technical Field
The invention relates to the technical field of electroacoustic transduction, in particular to a loudspeaker and electronic equipment using the loudspeaker.
Background
With the improvement of the living standard of people and the development of speaker technology, the expectations and requirements of people on the sound quality of electronic equipment are higher and higher. The performance of the loudspeaker as a transducer for converting an electrical signal into an acoustic signal largely determines the level of sound quality. Currently, more and more small electronic devices have higher and higher requirements for sound quality. But is limited by a small internal space in which it is difficult for the speakers to meet both low and high frequency requirements of sound quality.
Disclosure of Invention
The invention mainly aims to provide a loudspeaker and electronic equipment using the loudspeaker, and aims to better meet the requirements of various small electronic equipment on sound quality.
To achieve the above object, an embodiment of the present invention provides a speaker, which:
A basin stand;
the magnetic circuit system is fixed in the basin frame and provided with two end faces which are arranged in a back-to-back mode, a first magnetic gap and a second magnetic gap which are mutually spaced are formed on one end face of the magnetic circuit system, a third magnetic gap is formed on the other end face of the magnetic circuit system, and the second magnetic gap and the third magnetic gap are arranged in a back-to-back mode and are mutually communicated;
The first vibration system is provided with a first vibrating diaphragm and a first voice coil, the first vibrating diaphragm is covered on the basin frame and is arranged opposite to the first magnetic gap, and the first voice coil is connected with the first vibrating diaphragm and is inserted into the first magnetic gap; and
The second vibration system is provided with a second vibrating diaphragm and a second voice coil, the second vibrating diaphragm is covered on the basin frame and is arranged opposite to the third magnetic gap, and the second voice coil is connected with the second vibrating diaphragm and is simultaneously inserted into the second magnetic gap and the third magnetic gap;
when the second voice coil is electrified, the second magnetic gap and the third magnetic gap apply acting force in the same direction to the second voice coil.
In an embodiment of the invention, the first magnetic gap is located inside the second magnetic gap.
In an embodiment of the invention, the magnetic circuit system includes:
an inner magnetic circuit portion;
An intermediate magnetic circuit portion, which is disposed around the inner magnetic circuit portion and is spaced apart from the inner magnetic circuit portion to form the first magnetic gap; and
And an outer magnetic circuit portion surrounding the intermediate magnetic circuit portion and spaced apart from the intermediate magnetic circuit portion to form the second magnetic gap and the third magnetic gap.
In an embodiment of the invention, the inner magnetic circuit portion includes a first magnetically permeable plate, a first magnet, and a second magnetically permeable plate; the first magnet is clamped between the first magnetic conduction plate and the second magnetic conduction plate, and the outer edge of the second magnetic conduction plate extends outwards;
The intermediate magnetic circuit portion includes a second magnet and a third magnetically permeable plate; the second magnet is overlapped on the surface of the second magnetic conduction plate, provided with the first magnet, and is arranged outside the first magnet along the circumference of the second magnetic conduction plate in a surrounding manner and is arranged at intervals with the first magnet; the third magnetic conduction plate is overlapped on the surface of the second magnet, which is opposite to the second magnetic conduction plate, and the inner edge of the third magnetic conduction plate is spaced from the outer edge of the first magnetic conduction plate so as to form the first magnetic gap;
The outer magnetic circuit part comprises a fourth magnetic conduction plate, a third magnet and a fifth magnetic conduction plate; the third magnet is arranged outside the second magnet along the circumference of the second magnet in a surrounding manner and is arranged at intervals with the second magnet; the fourth magnetic conduction plate and the fifth magnetic conduction plate are respectively overlapped on two surfaces of the third magnet, which are opposite to each other; the fourth magnetic conduction plate is arranged outside the third magnetic conduction plate along the circumference of the third magnetic conduction plate in a surrounding manner and is arranged at intervals with the third magnetic conduction plate so as to form the second magnetic gap; the fifth magnetic conduction plate is arranged outside the second magnetic conduction plate along the circumference of the second magnetic conduction plate in a surrounding mode, and is arranged at intervals with the second magnetic conduction plate so as to form the third magnetic gap.
In one embodiment of the invention, the basin stand comprises a cylindrical body part, wherein the cylindrical body part is provided with a first end and a second end, and the first end and the second end are both arranged in an opening way;
The magnetic circuit system is fixed in the cylinder body, the first magnetic gap and the second magnetic gap are arranged towards the opening of the first end, and the third magnetic gap is arranged towards the opening of the second end;
the first vibrating diaphragm cover is arranged at the first end, and the second vibrating diaphragm cover is arranged at the second end.
In an embodiment of the invention, the basin stand further includes a blocking portion, the blocking portion is protruding on an inner wall surface of the first end and is circumferentially disposed around the cylindrical body, and an end of the blocking portion, which is away from the inner wall surface of the cylindrical body, abuts against an end surface of the magnetic circuit system, where the first magnetic gap and the second magnetic gap are formed, so as to isolate the first magnetic gap from the second magnetic gap, and enable a rear cavity of the first vibration system and a rear cavity of the second vibration system to be independent from each other.
In an embodiment of the invention, the second vibrating diaphragm, the magnetic circuit system, the cylinder body and the plugging portion enclose a rear cavity formed with the second vibrating system, and the second end is provided with a pressure relief hole communicated with the rear cavity of the second vibrating system.
In an embodiment of the present invention, the second voice coil includes:
The voice coil tube is connected with the second vibrating diaphragm and is simultaneously inserted into the second magnetic gap and the third magnetic gap;
the first voice coil section is wound on the voice coil pipe and is inserted into the second magnetic gap; and
The second voice coil section is wound on the voice coil pipe and is inserted into the third magnetic gap;
When the second voice coil is electrified, the acting force from the third magnetic gap received by the second voice coil section is in the same direction as the acting force from the second magnetic gap received by the first voice coil section.
In an embodiment of the present invention, the first voice coil segment and the second voice coil segment are disposed in series, and winding directions of the first voice coil segment and the second voice coil segment on the voice coil pipe are opposite.
To achieve the above object, an embodiment of the present invention also proposes an electronic device including a speaker including:
A basin stand;
the magnetic circuit system is fixed in the basin frame and provided with two end faces which are arranged in a back-to-back mode, a first magnetic gap and a second magnetic gap which are mutually spaced are formed on one end face of the magnetic circuit system, a third magnetic gap is formed on the other end face of the magnetic circuit system, and the second magnetic gap and the third magnetic gap are arranged in a back-to-back mode and are mutually communicated;
The first vibration system is provided with a first vibrating diaphragm and a first voice coil, the first vibrating diaphragm is covered on the basin frame and is arranged opposite to the first magnetic gap, and the first voice coil is connected with the first vibrating diaphragm and is inserted into the first magnetic gap; and
The second vibration system is provided with a second vibrating diaphragm and a second voice coil, the second vibrating diaphragm is covered on the basin frame and is arranged opposite to the third magnetic gap, and the second voice coil is connected with the second vibrating diaphragm and is simultaneously inserted into the second magnetic gap and the third magnetic gap;
when the second voice coil is electrified, the second magnetic gap and the third magnetic gap apply acting force in the same direction to the second voice coil.
The technical scheme of the invention is equivalent to providing a novel loudspeaker scheme which is separated in high frequency from low frequency and shares one set of magnetic circuit system, and the novel loudspeaker scheme is not limited to the shape of the magnetic circuit system and can be in various forms such as a round form, a rectangular form, a runway form and the like. The novel loudspeaker scheme is characterized in that a high-frequency vibration system (such as a first vibration system) and a low-frequency vibration system (such as a second vibration system) are separated, and the high-frequency vibration system and the low-frequency vibration system share one set of magnetic circuit system for driving, but a front cavity and a rear cavity of the high-frequency system are independent of and do not influence each other with the front cavity and the rear cavity of the low-frequency system, so that sound wave radiation of the high-frequency system and sound wave radiation of the low-frequency system are independent of each other and do not influence each other, and pure high-frequency sound signals and low-frequency sound signals can be provided. Therefore, the requirements of various small electronic devices on sound quality can be better met, and the requirements of the small electronic devices on sound quality with good high frequency and good low frequency can be met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of an embodiment of a speaker according to the present invention;
fig. 2 is a schematic structural diagram of the second voice coil in fig. 1.
Reference numerals illustrate:
| Reference numerals | Name of the name | Reference numerals | Name of the name |
| 100 | Loudspeaker | 331 | Second magnet |
| 10 | Basin stand | 333 | Third magnetic conduction plate |
| 11 | Barrel part | 35 | External magnetic circuit part |
| 111 | First end | 351 | Fourth magnetic conduction plate |
| 113 | Second end | 353 | Third magnet |
| 1131 | Pressure relief hole | 355 | Fifth magnetic conductive plate |
| 13 | Plugging part | 50 | First vibration system |
| 30 | Magnetic circuit system | 51 | First vibrating diaphragm |
| 30a | First magnetic gap | 53 | First voice coil |
| 30b | Second magnetic gap | 70 | Second vibration system |
| 30c | Third magnetic gap | 71 | Second vibrating diaphragm |
| 31 | Inner magnetic circuit part | 73 | Second voice coil |
| 311 | First magnetic conductive plate | 731 | Voice coil pipe |
| 313 | First magnet | 733 | First voice coil segment |
| 315 | Second magnetic conductive plate | 735 | Second voice coil section |
| 33 | Intermediate magnetic circuit part |
The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that all directional indicators (such as up, down, left, right, front, and rear … …) in the embodiments of the present invention are merely used to explain the relative positional relationship, movement, etc. between the components in a particular posture (as shown in the drawings), and if the particular posture is changed, the directional indicator is changed accordingly.
Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a number" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless specifically stated and limited otherwise, the terms "connected," "affixed," and the like are to be construed broadly, and for example, "affixed" may be a fixed connection, a removable connection, or an integral body; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In addition, the technical solutions of the embodiments of the present invention may be combined with each other, but it is necessary to be based on the fact that those skilled in the art can implement the technical solutions, and when the technical solutions are contradictory or cannot be implemented, the combination of the technical solutions should be considered as not existing, and not falling within the scope of protection claimed by the present invention.
Aiming at the technical problems mentioned in the background art, the invention provides a loudspeaker, which aims to better meet the requirements of various small electronic devices on sound quality.
It will be appreciated that the speaker proposed by the present invention can be applied to various types of small electronic devices, such as: a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a Personal digital assistant (Personal DIGITAL ASSISTANT, PDA), an electronic book reader, an MP3 (moving picture experts compression standard audio layer 3,Moving Picture Experts Group Audio Layer III) player, an MP4 (moving picture experts compression standard audio layer 4,Moving Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a palm game machine, a virtual reality device, an augmented reality device, a desktop speaker, and the like. In addition, the speaker provided by the invention can also be applied to various middle-or large-sized electronic devices, and will not be described in detail herein.
The following describes a specific structure of a speaker according to the present invention in a specific embodiment:
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the speaker 100 includes:
a basin stand 10;
A magnetic circuit system 30, wherein the magnetic circuit system 30 is fixed in the basin frame 10 and has two opposite end surfaces, a first magnetic gap 30a and a second magnetic gap 30b are formed on one end surface of the magnetic circuit system 30 at intervals, a third magnetic gap 30c is formed on the other end surface of the magnetic circuit system 30, and the second magnetic gap 30b and the third magnetic gap 30c are opposite and are communicated with each other;
A first vibration system 50, wherein the first vibration system 50 has a first diaphragm 51 and a first voice coil 53, the first diaphragm 51 is covered on the basin frame 10 and is disposed opposite to the first magnetic gap 30a, and the first voice coil 53 is connected to the first diaphragm 51 and is inserted into the first magnetic gap 30 a; and
A second vibration system 70, wherein the second vibration system 70 has a second diaphragm 71 and a second voice coil 73, the second diaphragm 71 is covered on the basin frame 10 and is disposed opposite to the third magnetic gap 30c, and the second voice coil 73 is connected to the second diaphragm 71 and is simultaneously inserted in the second magnetic gap 30b and the third magnetic gap 30 c;
wherein, when the second voice coil 73 is energized, the second magnetic gap 30b and the third magnetic gap 30c give the same directional force to the second voice coil 73.
In this embodiment, the speaker 100 is placed horizontally; the magnetic circuit system 30 is fixed by the basin stand 10; at this time, the upper end surface of the magnetic circuit system 30 is formed with a first magnetic gap 30a and a second magnetic gap 30b, and the second magnetic gap 30b is located outside the first magnetic gap 30 a; a third magnetic gap 30c is formed at the lower end surface of the magnetic circuit system 30.
Further, the first vibration system 50 is located above the magnetic circuit system 30, and the voice coil of the first vibration system 50 (i.e. the first voice coil 53) is vertically disposed and inserted into the first magnetic gap 30a of the magnetic circuit system 30; the second vibration system 70 is located below the magnetic circuit system 30, and the voice coil of the second vibration system 70 (i.e., the second voice coil 73) is vertically disposed and inserted into the second magnetic gap 30b and the third magnetic gap 30c of the magnetic circuit system 30. Wherein the first vibration system 50 and the second vibration system 70 may be used to receive signals in different frequency bands, so as to generate sound waves in different frequency bands, for example: the first vibration system 50 may be used to receive high frequency signals and radiate high frequency sound waves outwardly, and the second vibration system 70 may be used to receive low frequency signals and radiate low frequency sound waves outwardly.
At this time, it can be understood that the technical solution of the present embodiment is equivalent to providing a new speaker 100 solution that separates high frequency from low frequency and shares a set of magnetic circuit system 30, and the new speaker 100 solution is not limited to the shape of the magnetic circuit system 30, and may be in various forms such as a circle, a rectangle, a racetrack, and the like. The embodiment of the novel speaker 100 is characterized in that the high-frequency vibration system (for example, the first vibration system 50) and the low-frequency vibration system (for example, the second vibration system 70) are separated, and the two systems share a set of magnetic circuit system 30 for driving, but the front cavity and the rear cavity of the high-frequency system are independent of each other and do not affect each other with the front cavity and the rear cavity of the low-frequency system, so that the sound wave radiation of the high-frequency system and the sound wave radiation of the low-frequency system are independent of each other and do not affect each other, and pure high-frequency sound signals and low-frequency sound signals can be provided. Therefore, the requirements of various small electronic devices on sound quality can be better met, and the requirements of the small electronic devices on sound quality with good high frequency and good low frequency can be met.
In other words, the novel speaker 100 solution provided in the present embodiment has the following advantages:
(1) The novel speaker 100 provided in this embodiment can realize that one magnetic circuit system 30 can simultaneously generate two sound effects of low frequency and high frequency, and if the speaker is installed in a product, the speaker can realize the design of low frequency downward and high frequency upward; thus, the low frequency can be diffused in all directions due to nondirectionality; the high frequency has strong directivity, so that the radiation to the greatest extent can be obtained;
(2) The design of separating the high-frequency system from the low-frequency system can better meet the requirements of the acoustic equipment on high frequency and low frequency, and can better restore the tone quality of the high frequency and the low frequency, thereby solving the problem of insufficient acoustic design of the high frequency and the low frequency caused by a single loudspeaker 100 system in the prior art;
(3) In the prior art, the magnetic circuit system 30 of the speaker 100 is generally configured with only one magnetic gap; however, in the new speaker 100 solution provided in this embodiment, three magnetic gaps are designed on the magnetic circuit system 30, one of the magnetic gaps is used to push the diaphragm of the high-frequency system to move, and the other two magnetic gaps are used to push the diaphragm of the low-frequency system to move, so that compared with the mode of stacking a low-frequency speaker 100 and a high-frequency speaker 100 that are independent of each other, the new speaker 100 solution provided in this embodiment can greatly reduce the axial dimension of the speaker 100, thereby better meeting the requirements of various small electronic devices on sound quality;
(4) If the prior art single speaker 100 system is to compromise both high and low frequency sound effects, the acoustic power will become large and the amplitude will increase. In this way, the reliability risk of the acoustic device is greatly increased, for example: the breakage of the voice coil, rupture of the diaphragm, etc. sometimes occur. The novel speaker 100 scheme provided in this embodiment adopts a design of separating a high-frequency system from a low-frequency system, and can overcome the trouble caused by power and amplitude enhancement compared with a single speaker 100 system;
(5) The novel loudspeaker 100 scheme provided by the embodiment can ensure that the rear cavity of the high-frequency system is completely closed, namely the front cavity and the rear cavity of the high-frequency system are independent of the front cavity and the rear cavity of the low-frequency system, and are not mutually influenced, namely the vibrating diaphragm of the high-frequency system and the vibrating diaphragm of the low-frequency system, sound waves generated at the rear of the two cannot be crosstalked, and acoustic energy radiation cannot be weakened due to the phase problem of the sound radiation; meanwhile, the pressure of the air in the rear cavity of the high-frequency system can be ensured, so that the resonant frequency of the high-frequency system can be reduced, the vibration amplitude of the vibrating diaphragm of the high-frequency system can not be too large, and the high-frequency system can be protected from being damaged.
(6) The novel speaker 100 provided in this embodiment is also beneficial to implementing the coaxial design of the low-frequency system and the high-frequency system, so that the phenomenon of channel separation is not generated, and the subjective listening experience is better.
(7) The novel speaker 100 provided in this embodiment adopts a design of a single voice coil with double winding widths (i.e., a single voice coil with double magnetic gaps), that is, one voice coil obtains the same-direction driving of two magnetic gaps at the same time, so that the low-frequency energy or sensitivity of the low-frequency system radiated outwards is higher.
In one embodiment of the speaker 100 of the present invention, as shown in fig. 1, the first magnetic gap 30a is located inside the second magnetic gap 30 b. Thus, the voice coil movement path constituted by the second magnetic gap 30b and the third magnetic gap 30c is closer to the outside of the magnetic circuit system 30 than the first magnetic gap 30 a; at this time, the configuration of the parts (e.g., the blocking part 13 of the basin stand 10 described later) for realizing the isolation (independence) of the rear cavity of the high frequency system and the rear cavity of the low frequency system is also simpler and more convenient, and at the same time, the stability and reliability are good, so that the reliability of the whole speaker 100 is enhanced.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the magnetic circuit system 30 includes:
An inner magnetic circuit portion 31;
an intermediate magnetic circuit portion 33, the intermediate magnetic circuit portion 33 being enclosed outside the inner magnetic circuit portion 31 and being spaced apart from the inner magnetic circuit portion 31 to form the first magnetic gap 30a; and
An outer magnetic circuit portion 35, the outer magnetic circuit portion 35 being enclosed outside the intermediate magnetic circuit portion 33 and being spaced apart from the intermediate magnetic circuit portion 33 to form the second magnetic gap 30b and the third magnetic gap 30c.
It can be understood that, under the design of the present embodiment, the first magnetic gap 30a and the second magnetic gap 30b are located on the same side of the magnetic circuit system 30, and are both arranged in a ring shape; the arrangement of the first magnetic gap 30a and the second magnetic gap 30b is equivalent to the mode of sleeving the outer ring on the outer side of the inner ring, namely, the two are nested in the horizontal direction; at this time, the third magnetic gap 30c is disposed at the other side of the magnetic circuit 30, and is disposed opposite to and in communication with the second magnetic gap 30 b. In this way, the radial full utilization of the magnetic circuit system 30 and the full utilization of different end surfaces of the magnetic circuit system 30 can be realized, so that the height of the magnetic circuit system 30 is reduced, the axial size of the loudspeaker 100 is reduced, and various small electronic devices can be better adapted.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the inner magnetic circuit portion 31 includes a first magnetic conductive plate 311, a first magnet 313 and a second magnetic conductive plate 315; wherein the first magnet 313 is sandwiched between the first magnetic conductive plate 311 and the second magnetic conductive plate 315, and the outer edge of the second magnetic conductive plate 315 extends outwards;
The intermediate magnetic circuit portion 33 includes a second magnet 331 and a third magnetically permeable plate 333; the second magnet 331 is stacked on the surface of the second magnetic conductive plate 315, on which the first magnet 313 is disposed, and is surrounded on the outside of the first magnet 313 along the circumferential direction of the second magnetic conductive plate 315, and is spaced from the first magnet 313; the third magnetic conductive plate 333 is stacked on the surface of the second magnet 331 facing away from the second magnetic conductive plate 315, and the inner edge is spaced from the outer edge of the first magnetic conductive plate 311 to form the first magnetic gap 30a;
The outer magnetic circuit portion 35 includes a fourth magnetic conductive plate 351, a third magnet 353, and a fifth magnetic conductive plate 355; wherein the third magnet 353 is disposed around the second magnet 331 along the circumference of the second magnet 331 and is spaced apart from the second magnet 331; the fourth magnetic conductive plate 351 and the fifth magnetic conductive plate 355 are respectively stacked on two surfaces of the third magnet 353, which are disposed opposite to each other; the fourth magnetic conductive plate 351 is disposed outside the third magnetic conductive plate 333 along the circumferential direction of the third magnetic conductive plate 333 and spaced from the third magnetic conductive plate 333 to form the second magnetic gap 30b; the fifth magnetic conductive plate 355 is disposed around the second magnetic conductive plate 315 along the circumferential direction of the second magnetic conductive plate 315, and is spaced apart from the second magnetic conductive plate 315, so as to form the third magnetic gap 30c.
It can be understood that, under the design of the present embodiment, the inner side of the first magnetic gap 30a is the inner magnetic circuit portion 31 formed by the first magnetic conductive plate 311, the first magnet 313 and the second magnetic conductive plate 315, so as to provide a powerful magnetic field environment for the first voice coil 53 in the first magnetic gap 30 a; meanwhile, the middle magnetic circuit part 33 formed by the second magnet 331 and the third magnetic conduction plate 333 is arranged outside the first magnetic gap 30a, so that a strong magnetic field environment can be provided for the first voice coil 53 in the first magnetic gap 30 a; in this way, the first voice coil 53 inserted in the first magnetic gap 30a can obtain the driving support of multiple magnets, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving by a single magnet, and improve the acoustic performance of the first vibration system 50.
Similarly, inside the second magnetic gap 30b is the intermediate magnetic circuit portion 33 constituted by the second magnet 331 and the third magnetic conductive plate 333, which can provide a strong magnetic field environment for the second voice coil 73 in the second magnetic gap 30 b; meanwhile, the outer magnetic circuit portion 35 formed by the fourth magnetic conductive plate 351, the third magnetic body 353 and the fifth magnetic conductive plate 355 is arranged outside the second magnetic gap 30b, so that a strong magnetic field environment can be provided for the second voice coil 73 in the second magnetic gap 30 b; in this way, the second voice coil 73 inserted in the second magnetic gap 30b can obtain the driving support of multiple magnets, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving by a single magnet, and improve the acoustic performance of the second vibration system 70. Similarly, the inner side of the third magnetic gap 30c is the intermediate magnetic circuit portion 33 constituted by the second magnet 331 and the third magnetic conductive plate 333, which can provide a strong magnetic field environment for the second voice coil 73 in the third magnetic gap 30 c; meanwhile, the outer magnetic circuit portion 35 formed by the fourth magnetic conductive plate 351, the third magnet 353 and the fifth magnetic conductive plate 355 is outside the third magnetic gap 30c, so that a strong magnetic field environment can be provided for the second voice coil 73 in the third magnetic gap 30 c; in this way, the second voice coil 73 inserted in the third magnetic gap 30c can obtain the driving support of multiple magnets, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving by a single magnet, and improve the acoustic performance of the second vibration system 70.
That is, the present embodiment performs the multi-magnet layout on the magnetic circuit system 30, and enhances the driving of the high-frequency system and the low-frequency system, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance, and the like caused by the multi-system driving of the single magnet, so that the acoustic performance of the speaker 100 is improved.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the tub 10 includes a cylindrical body 11, the cylindrical body 11 has a first end 111 and a second end 113, and the first end 111 and the second end 113 are both disposed in an opening manner;
The magnetic circuit system 30 is fixed in the cylinder 11, the first magnetic gap 30a and the second magnetic gap 30b are disposed toward the opening of the first end 111, and the third magnetic gap 30c is disposed toward the opening of the second end 113;
the first diaphragm 51 is disposed on the first end 111, and the second diaphragm 71 is disposed on the second end 113.
In this embodiment, the barrel 11 is disposed vertically, with its first end 111 disposed upward and its second end 113 disposed downward. The magnetic circuit system 30 is fixed in the cylinder 11 and is positioned in the middle of the cylinder 11; the first vibration system 50 is fixed to the cylindrical body 11, and has a diaphragm (i.e., a first diaphragm 51) located at an upper portion of the cylindrical body 11, and a voice coil (i.e., a first voice coil 53) extending from the upper portion of the cylindrical body 11 to a lower portion of the cylindrical body 11 until being inserted into the first magnetic gap 30 a; the second vibration system 70 is fixed to the cylindrical body 11, and has a diaphragm (i.e., the second diaphragm 71) located at the lower portion of the cylindrical body 11, and a voice coil (i.e., the second voice coil 73) extending from the lower portion of the cylindrical body 11 to the upper portion of the cylindrical body 11 until passing through the third magnetic gap 30c and being inserted into the second magnetic gap 30 b.
It will be appreciated that, since the first vibration system 50 and the second vibration system 70 need to optimally respond to signals in different frequency bands, the radiation area of the first vibration system 50 and the radiation area of the second vibration system 70 may be different, for example: in the present embodiment, the circumferential surrounding area of the diaphragm (i.e., the first diaphragm 51) of the first vibration system 50 is smaller than the circumferential surrounding area of the diaphragm (i.e., the second diaphragm 71) of the second vibration system 70.
At this time, the surrounding areas of the different parts of the cylindrical body 11 will be adaptively changed according to the sizes of the first diaphragm 51 and the second diaphragm 71, for example: in this embodiment, the cylinder 11 forms a first cylinder section at the cover of the first diaphragm 51 for connecting and fixing the outer edge of the first diaphragm 51 (specifically, fixing can be achieved by adopting a mode such as bonding); meanwhile, the cylinder 11 is formed with a second cylinder section at the cover of the second diaphragm 71 for connecting and fixing the outer edge of the second diaphragm 71 (specifically, fixing can be realized by adopting modes such as bonding); at this time, the first cylinder section is arranged in a shrinking manner compared with the second cylinder section, namely, the surrounding area of the first cylinder section is smaller than that of the second cylinder section.
It can be appreciated that, under the design of the present embodiment, the basin stand 10 accommodates and fixes the magnetic circuit system 30, the first vibration system 50 and the second vibration system 70 through the cylindrical body 11 thereof, so that the speaker 100 has better integrity and higher reliability, not only facilitates the installation and fixation of each component and improves the production efficiency, but also facilitates the stable cooperation of the magnetic circuit system 30 and the first vibration system 50 and the second vibration system 70, and improves the acoustic performance of the speaker 100.
As shown in fig. 1, in an embodiment of the speaker 100 according to the present invention, the frame 10 further includes a blocking portion 13, where the blocking portion 13 is protruding on an inner wall surface of the first end 111 and is circumferentially disposed around the cylindrical body 11, and an end of the blocking portion 13 facing away from the inner wall surface of the cylindrical body 11 abuts against an end surface of the magnetic circuit system 30 where the first magnetic gap 30a and the second magnetic gap 30b are formed, so as to isolate the first magnetic gap 30a from the second magnetic gap 30b, so that a rear cavity of the first vibration system 50 and a rear cavity of the second vibration system 70 are independent from each other. Specifically, an end of the blocking portion 13 facing away from the inner wall surface of the cylindrical body 11 abuts against the intermediate magnetic circuit portion 33.
It can be understood that, under the design of the present embodiment, the blocking portion 13 isolates the first magnetic gap 30a from the second magnetic gap 30b, so that the rear cavity of the high-frequency system is completely closed, that is, the front cavity and the rear cavity of the high-frequency system are independent of each other and do not affect each other, that is, the vibration film of the high-frequency system and the vibration film of the low-frequency system, sound waves generated behind the two cannot cross each other, and acoustic energy radiation cannot be attenuated due to the phase problem of acoustic radiation; meanwhile, the pressure of the air in the rear cavity of the high-frequency system can be ensured, so that the resonant frequency of the high-frequency system can be reduced, the vibration amplitude of the vibrating diaphragm of the high-frequency system can not be too large, and the high-frequency system can be protected from being damaged.
It will be further understood that, in the design of the present embodiment, the isolation between the first magnetic gap 30a and the second magnetic gap 30b is achieved by the blocking portion 13 on the inner wall surface of the first end 111 of the cylindrical body 11, which is simple in structure and highly reliable. Meanwhile, the plugging portion 13 can also play a role in supporting and positioning the magnetic circuit system 30, so that the magnetic circuit system 30 is helped to enhance its own stability, so as to be beneficial to stable matching of the magnetic circuit system 30 with the first vibration system 50 and the second vibration system 70, and to improve the acoustic performance of the loudspeaker 100.
In addition, the end surface of the blocking portion 13 facing away from the inner wall surface of the cylinder 11 and the upper end surface of the magnetic circuit system 30 may be sealed and connected by, for example, an adhesive, so as to further enhance the isolation effect and enhance the stability of the magnetic circuit system 30.
As shown in fig. 1, in an embodiment of the speaker 100 according to the present invention, the second diaphragm 71, the magnetic circuit system 30, the cylinder 11 and the blocking portion 13 enclose a rear cavity formed with the second vibration system 70, and the second end 113 is provided with a pressure relief hole 1131 communicating with the rear cavity of the second vibration system 70.
It can be understood that, under the design of the present embodiment, the first diaphragm 51, the magnetic circuit system 30, the cylinder 11 and the blocking portion 13 also enclose a rear cavity, and the rear cavity is a rear cavity of the first vibration system 50, that is, a rear cavity of the high-frequency system; the rear cavity surrounded by the second diaphragm 71, the magnetic circuit system 30, the cylindrical body 11, and the blocking portion 13 is the rear cavity of the second vibration system 70, i.e., the rear cavity of the low-frequency system.
The two rear cavities not only keep the independence of the two rear cavities, but also avoid the problem that the acoustic energy radiation is weakened due to the phase problem of the acoustic radiation; and the rear cavity of the low-frequency system also utilizes the lateral pressure relief holes 1131 to realize communication with the outside:
In this way, the pressure change in the rear cavity of the low-frequency system can be regulated through the pressure relief hole 1131, the amplitude of the vibrating diaphragm of the low-frequency system is prevented from being influenced by overlarge or undersize air pressure in the rear cavity of the low-frequency system, and the influence on the sound sensitivity of the low-frequency system is avoided; that is, the resistance when the diaphragm of the low frequency system vibrates is reduced, so that the diaphragm of the low frequency system can reach the maximum linear displacement position to the maximum extent, the amplitude is increased, and the efficiency of low frequency radiation is improved.
As shown in fig. 1 and 2, in an embodiment of the speaker 100 of the present invention, the second voice coil 73 includes:
A voice coil pipe 731, wherein the voice coil pipe 731 is connected to the second diaphragm 71 and is interposed between the second magnetic gap 30b and the third magnetic gap 30 c;
a first voice coil section 733 wound on the voice coil pipe 731 and interposed in the second magnetic gap 30 b; and
A second voice coil segment 735, wherein the second voice coil segment 735 is wound on the voice coil pipe 731 and is inserted into the third magnetic gap 30 c;
When the second voice coil 73 is energized, the force from the third magnetic gap 30c received by the second voice coil segment 735 is in the same direction as the force from the second magnetic gap 30b received by the first voice coil segment 733.
The aforementioned "inner magnetic circuit portion 31 includes the first magnetic conductive plate 311, the first magnet 313, and the second magnetic conductive plate 315; the intermediate magnetic circuit portion 33 includes a second magnet 331 and a third magnetically permeable plate 333; the magnetic circuit system 30, in which the outer magnetic circuit portion 35 includes the fourth magnetic conductive plate 351, the third magnetic body 353, and the fifth magnetic conductive plate 355", is arranged as an example, then:
In this magnetic circuit system 30, the direction of the magnetic induction lines in the second magnetic gap 30b is exactly opposite to the direction of the magnetic induction lines in the third magnetic gap 30 c; therefore, it is necessary to energize the second voice coil 73 so that the current flow in the first voice coil section 733 is also opposite to the current flow in the second voice coil section 735. In this way, the second voice coil 73 in the energized state can obtain the same-direction driving force provided by the two magnetic gaps at the same time, so that the low-frequency energy or sensitivity of the low-frequency system radiated outwards is higher.
In order to make the current flow in the first voice coil section 733 and the current flow in the second voice coil section 735 just opposite to each other when the second voice coil 73 is energized, at least the following configurations may be adopted:
(1) The input end and the output end of the first voice coil section 733 are mutually independent and do not interfere with the input end and the output end of the second voice coil section 735, so that the control of the current flow direction in the first voice coil section 733 and the control of the current flow direction in the second voice coil section 735 are mutually independent and do not interfere with each other; at this time, the first voice coil section 733 and the second voice coil section 735 are formed by winding two different voice coil wires on the voice coil pipe 731, respectively; in this case, there is no requirement for the winding direction of the first voice coil section 733 and the winding direction of the second voice coil section 735;
(2) The first voice coil section 733 and the second voice coil section 735 are arranged in parallel; at this time, the first voice coil section 733 and the second voice coil section 735 are formed by winding two different voice coil wires on the voice coil pipe 731, respectively; in this case, the winding directions of the first voice coil section 733 and the second voice coil section 735 on the voice coil pipe 731 are opposite;
(3) The first voice coil section 733 and the second voice coil section 735 are disposed in series; at this time, the first voice coil section 733 and the second voice coil section 735 are formed by winding the same voice coil wire around the voice coil pipe 731; in this case, the first voice coil segment 733 and the second voice coil segment 735 are wound around the voice coil pipe 731 in opposite directions (as shown in fig. 2).
It can be appreciated that, compared with the former two configurations, the third configuration can be completed by winding only one voice coil wire, and the design of the circuit is relatively simple; in this way, not only the structure of the speaker 100 can be simplified, but also the control of the speaker 100 can be made simpler and more reliable.
The invention also proposes an electronic device comprising a loudspeaker 100 as described above, the specific structure of the loudspeaker 100 being in accordance with the previous embodiments. Because the electronic device adopts all the technical schemes of all the embodiments, the electronic device at least has all the beneficial effects brought by all the technical schemes of all the embodiments, and the detailed description is omitted. Wherein the electronic device further comprises an electronic control assembly comprising a frequency divider to which the loudspeaker 100 is electrically connected.
It is understood that the electronic device may be, but is not limited to, a cell phone, tablet, television, display, notebook, digital photo frame, personal digital assistant (Personal DIGITAL ASSISTANT, PDA), electronic book reader, MP3 (dynamic video expert compression standard audio plane 3,Moving Picture Experts Group Audio Layer III) player, MP4 (dynamic video expert compression standard audio plane 4,Moving Picture Experts Group Audio Layer IV) player, wearable device, navigator, palm game console, virtual reality device, augmented reality device, desktop speakers, etc.
Further, the first vibration system 50 and the second vibration system 70 of the speaker 100 are electrically connected to the frequency divider. Specifically, the frequency divider has a first output port to which the first vibration system 50 of the speaker 100 is electrically connected and a second output port to which the second vibration system 70 of the speaker 100 is electrically connected.
It can be understood that under the design of the present embodiment, before the low-frequency system and the high-frequency system, the frequency divider may be used to divide the signals, so that the frequency division input of the signals can be implemented—the high-frequency signal enters the high-frequency system and the low-frequency signal enters the low-frequency system, so that the high-frequency signal and the low-frequency signal can be respectively on the way (where the high-frequency signal and the low-frequency signal may also have proper overlapping), and the advantages of the working frequency bands of the high-frequency system and the low-frequency system are fully utilized. Therefore, under the condition that the safe operation of the systems in different frequency bands is ensured and the full play of the systems in different frequency bands is realized, the playback characteristics in different frequency bands are more balanced.
The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.
Claims (8)
1. A loudspeaker, comprising:
A basin stand;
the magnetic circuit system is fixed in the basin frame and provided with two end faces which are arranged in a back-to-back mode, a first magnetic gap and a second magnetic gap which are mutually spaced are formed on one end face of the magnetic circuit system, a third magnetic gap is formed on the other end face of the magnetic circuit system, and the second magnetic gap and the third magnetic gap are arranged in a back-to-back mode and are mutually communicated;
The first vibration system is provided with a first vibrating diaphragm and a first voice coil, the first vibrating diaphragm is covered on the basin frame and is arranged opposite to the first magnetic gap, and the first voice coil is connected with the first vibrating diaphragm and is inserted into the first magnetic gap; and
The second vibration system is provided with a second vibrating diaphragm and a second voice coil, the second vibrating diaphragm is covered on the basin frame and is arranged opposite to the third magnetic gap, and the second voice coil is connected with the second vibrating diaphragm and is simultaneously inserted into the second magnetic gap and the third magnetic gap;
When the second voice coil is electrified, the second magnetic gap and the third magnetic gap apply acting force in the same direction to the second voice coil;
The second voice coil includes:
The voice coil tube is connected with the second vibrating diaphragm and is simultaneously inserted into the second magnetic gap and the third magnetic gap;
the first voice coil section is wound on the voice coil pipe and is inserted into the second magnetic gap; and
The second voice coil section is wound on the voice coil pipe and is inserted into the third magnetic gap;
When the second voice coil is electrified, the acting force from the third magnetic gap received by the second voice coil section is in the same direction as the acting force from the second magnetic gap received by the first voice coil section;
The first voice coil section and the second voice coil section are arranged in series, and the winding directions of the first voice coil section and the second voice coil section on the voice coil pipe are opposite.
2. The loudspeaker of claim 1, wherein the first magnetic gap is located inside the second magnetic gap.
3. The loudspeaker of claim 2, wherein the magnetic circuit system comprises:
an inner magnetic circuit portion;
An intermediate magnetic circuit portion, which is disposed around the inner magnetic circuit portion and is spaced apart from the inner magnetic circuit portion to form the first magnetic gap; and
And an outer magnetic circuit portion surrounding the intermediate magnetic circuit portion and spaced apart from the intermediate magnetic circuit portion to form the second magnetic gap and the third magnetic gap.
4. A loudspeaker according to claim 3, wherein the inner magnetic circuit portion comprises a first magnetically permeable plate, a first magnet and a second magnetically permeable plate; the first magnet is clamped between the first magnetic conduction plate and the second magnetic conduction plate, and the outer edge of the second magnetic conduction plate extends outwards;
The intermediate magnetic circuit portion includes a second magnet and a third magnetically permeable plate; the second magnet is overlapped on the surface of the second magnetic conduction plate, provided with the first magnet, and is arranged outside the first magnet along the circumference of the second magnetic conduction plate in a surrounding manner and is arranged at intervals with the first magnet; the third magnetic conduction plate is overlapped on the surface of the second magnet, which is opposite to the second magnetic conduction plate, and the inner edge of the third magnetic conduction plate is spaced from the outer edge of the first magnetic conduction plate so as to form the first magnetic gap;
The outer magnetic circuit part comprises a fourth magnetic conduction plate, a third magnet and a fifth magnetic conduction plate; the third magnet is arranged outside the second magnet along the circumference of the second magnet in a surrounding manner and is arranged at intervals with the second magnet; the fourth magnetic conduction plate and the fifth magnetic conduction plate are respectively overlapped on two surfaces of the third magnet, which are opposite to each other; the fourth magnetic conduction plate is arranged outside the third magnetic conduction plate along the circumference of the third magnetic conduction plate in a surrounding manner and is arranged at intervals with the third magnetic conduction plate so as to form the second magnetic gap; the fifth magnetic conduction plate is arranged outside the second magnetic conduction plate along the circumference of the second magnetic conduction plate in a surrounding mode, and is arranged at intervals with the second magnetic conduction plate so as to form the third magnetic gap.
5. The loudspeaker of claim 1, wherein the frame comprises a barrel having a first end and a second end, the first end and the second end each being open;
The magnetic circuit system is fixed in the cylinder body, the first magnetic gap and the second magnetic gap are arranged towards the opening of the first end, and the third magnetic gap is arranged towards the opening of the second end;
the first vibrating diaphragm cover is arranged at the first end, and the second vibrating diaphragm cover is arranged at the second end.
6. The loudspeaker of claim 5, wherein the basin frame further comprises a blocking portion, the blocking portion is protruding on an inner wall surface of the first end and is circumferentially and circumferentially disposed along the cylindrical body, and an end of the blocking portion, which is away from the inner wall surface of the cylindrical body, abuts against an end surface of the magnetic circuit system, on which the first magnetic gap and the second magnetic gap are formed, so as to isolate the first magnetic gap from the second magnetic gap, and enable a rear cavity of the first vibration system and a rear cavity of the second vibration system to be independent from each other.
7. The loudspeaker of claim 6, wherein the second diaphragm, the magnetic circuit system, the cylindrical body and the blocking portion enclose a rear cavity formed with the second vibration system, and the second end is provided with a pressure relief hole communicating with the rear cavity of the second vibration system.
8. An electronic device comprising a loudspeaker as claimed in any one of claims 1 to 7.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756828A (en) * | 2019-01-15 | 2019-05-14 | 歌尔股份有限公司 | Sounding device and electronic equipment |
| CN212752630U (en) * | 2020-08-26 | 2021-03-19 | 瑞声科技(新加坡)有限公司 | Composite loudspeaker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| TWM349154U (en) * | 2008-08-21 | 2009-01-11 | Jetvox Acoustic Corp | Dual frequency coaxial earphone with common magnet |
| CN204681583U (en) * | 2015-05-07 | 2015-09-30 | 珠海市源声电子有限公司 | The two moving-coil unit loudspeaker of a kind of coaxial homophase |
| CN206413193U (en) * | 2017-02-15 | 2017-08-15 | 微鲸科技有限公司 | Bidirectional sounding loudspeaker and sound-box device |
| CN110972041A (en) * | 2018-09-28 | 2020-04-07 | 惠州迪芬尼声学科技股份有限公司 | Single-magnetic double-sound-path coaxial loudspeaker |
| CN214045990U (en) * | 2021-02-10 | 2021-08-24 | Oppo广东移动通信有限公司 | Hybrid speaker and audio reproducing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109756828A (en) * | 2019-01-15 | 2019-05-14 | 歌尔股份有限公司 | Sounding device and electronic equipment |
| CN212752630U (en) * | 2020-08-26 | 2021-03-19 | 瑞声科技(新加坡)有限公司 | Composite loudspeaker |
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