CN114449420A - Speaker and electronic apparatus - Google Patents

Speaker and electronic apparatus Download PDF

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Publication number
CN114449420A
CN114449420A CN202210114189.1A CN202210114189A CN114449420A CN 114449420 A CN114449420 A CN 114449420A CN 202210114189 A CN202210114189 A CN 202210114189A CN 114449420 A CN114449420 A CN 114449420A
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CN
China
Prior art keywords
magnetic
magnetic gap
voice coil
conduction plate
magnet
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Pending
Application number
CN202210114189.1A
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Chinese (zh)
Inventor
李震
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Goertek Techology Co Ltd
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Goertek Techology Co Ltd
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Application filed by Goertek Techology Co Ltd filed Critical Goertek Techology Co Ltd
Priority to CN202210114189.1A priority Critical patent/CN114449420A/en
Publication of CN114449420A publication Critical patent/CN114449420A/en
Pending legal-status Critical Current

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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
    • 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
    • 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

Abstract

The invention discloses a speaker and an electronic apparatus. 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 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 back to back and communicated; the first vibration system is provided with a first vibration diaphragm and a first voice coil, the first vibration diaphragm is arranged on the basin frame in a covering mode and is opposite to the first magnetic gap, and the first voice coil is connected to the first vibration diaphragm and is inserted into the first magnetic gap; the second vibration system is provided with a second vibration diaphragm and a second voice coil, the second vibration diaphragm is arranged on the basin frame in a covering mode and is opposite to the third magnetic gap, and the second voice coil is connected to the second vibration diaphragm and is 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 give acting force to the second voice coil in the same direction. The invention can better meet the requirements of various small electronic devices on the tone quality.

Description

Speaker and electronic apparatus
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 living standard and the development of speaker technology, people have higher and higher expectations and requirements for sound quality of electronic devices. The performance of a loudspeaker as a transducer for converting an electric signal into an acoustic signal largely determines the quality of the sound quality. At present, more and more small electronic devices have higher and higher requirements for sound quality. However, the speaker is limited to a small internal space, and it is difficult to satisfy both low and high frequency requirements of sound quality.
Disclosure of Invention
The invention mainly aims to provide a loudspeaker and electronic equipment applying 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, including:
a basin stand;
the magnetic circuit system is fixed in the basin frame and is provided with two end faces which are arranged back to back, 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 back to back 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 arranged on the basin frame in a covering mode and is opposite to the first magnetic gap, and the first voice coil is connected to 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 arranged on the basin frame in a covering mode and is opposite to the third magnetic gap, and the second voice coil is connected to the second vibrating diaphragm and is inserted into the second magnetic gap and the third magnetic gap at the same time;
when the second voice coil is electrified, the second magnetic gap and the third magnetic gap give acting force to the second voice coil in the same direction.
In an embodiment of the invention, the first magnetic gap is located inside the second magnetic gap.
In an embodiment of the present invention, the magnetic circuit system includes:
an inner magnetic path portion;
an intermediate magnetic circuit portion enclosed outside the inner magnetic circuit portion and spaced from the inner magnetic circuit portion to form the first magnetic gap; and
an outer magnetic circuit portion disposed around and spaced apart from the intermediate magnetic circuit portion to form the second and third magnetic gaps.
In an embodiment of the present invention, the inner magnetic path portion includes a first magnetic conductive plate, a first magnet, and a second magnetic conductive 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 middle magnetic circuit part comprises a second magnet and a third magnetic conductive plate; the second magnet is overlapped on the surface of the second magnetic conduction plate, which is provided with the first magnet, is arranged outside the first magnet in a surrounding manner along the circumferential direction of the second magnetic conduction plate, and is arranged at intervals with the first magnet; the third magnetic conduction plate is stacked on the surface of the second magnet, which is back 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 in a surrounding manner along the circumferential direction of the second magnet 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 oppositely arranged surfaces of the third magnet; the fourth magnetic conduction plate is arranged outside the third magnetic conduction plate in the circumferential direction of the third magnetic conduction plate and is arranged at intervals with the third magnetic conduction plate to form the second magnetic gap; and the fifth magnetic conduction plate is arranged outside the second magnetic conduction plate in a surrounding manner along the circumferential direction of the second magnetic conduction plate 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 barrel body, wherein the barrel body 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 part, 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 diaphragm cover is arranged at the first end, and the second 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 convexly arranged on an inner wall surface of the first end and circumferentially arranged along the cylinder portion, and an end of the blocking portion, which is away from the inner wall surface of the cylinder portion, 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 make a back cavity of the first vibration system and a back cavity of the second vibration system independent from each other.
In an embodiment of the invention, a back cavity of the second vibration system is formed by enclosing the second diaphragm, the magnetic circuit system, the barrel portion, and the blocking portion, and the second end is provided with a pressure relief hole communicated with the back cavity of the second vibration system.
In an embodiment of the present invention, the second voice coil includes:
a voice coil tube connected to the second diaphragm and inserted into the second magnetic gap and the third magnetic gap at the same time;
the first voice coil section is wound on the voice coil tube and inserted in the second magnetic gap; and
the second voice coil section is wound on the voice coil tube and inserted in the third magnetic gap;
when the second voice coil is electrified, the acting force from the third magnetic gap on the second voice coil section is in the same direction as the acting force from the second magnetic gap on the first voice coil section.
In an embodiment of the present invention, the first voice coil section and the second voice coil section are serially connected, and winding directions of the first voice coil section and the second voice coil section on the voice coil tube are opposite.
To achieve the above object, an embodiment of the present invention further provides an electronic device, including a speaker, including:
a basin stand;
the magnetic circuit system is fixed in the basin frame and is provided with two end faces which are arranged back to back, a first magnetic gap and a second magnetic gap which are mutually separated 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 back to back 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 arranged on the basin frame in a covering mode and is opposite to the first magnetic gap, and the first voice coil is connected to 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 arranged on the basin frame in a covering mode and is opposite to the third magnetic gap, and the second voice coil is connected to the second vibrating diaphragm and is inserted into the second magnetic gap and the third magnetic gap at the same time;
when the second voice coil is electrified, the second magnetic gap and the third magnetic gap give acting force to the second voice coil in the same direction.
The technical scheme of the invention is equivalent to providing a novel loudspeaker scheme which has separated high and low frequencies and shares a 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 round, rectangular, runway-shaped 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, the high-frequency vibration system and the low-frequency vibration system share one magnetic circuit system for driving, but a front cavity and a rear cavity of the high-frequency vibration system are independent from a front cavity and a rear cavity of the low-frequency vibration system and are not influenced by each other, so that sound wave radiation of the high-frequency vibration system and sound wave radiation of the low-frequency vibration system are independent from each other and are not influenced by 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 tone quality can be better met, and the requirements of the small electronic devices on tone quality which need to have good high frequency and good low frequency are met.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a speaker according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the second voice coil in fig. 1.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
100 Loudspeaker 331 Second magnet
10 Basin rack 333 Third magnetic conductive plate
11 Barrel part 35 Outer magnetic circuit portion
111 First end 351 Fourth magnetic conductive 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 diaphragm
30a First magnetic gap 53 First voice coil
30b Second magnetic gap 70 Second vibration system
30c Third magnetic gap 71 Second diaphragm
31 Inner magnetic path section 73 Second voice coil
311 First magnetic conduction plate 731 Voice coil tube
313 First magnet 733 A first voice coil section
315 Second magnetic conduction plate 735 Second voice coil section
33 Intermediate magnetic circuit part
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a number" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides a loudspeaker aiming at better meeting the requirements of various small electronic devices on the sound quality aiming at the technical problems mentioned in the background technology.
It can be understood that the speaker proposed by the present invention can be applied to various 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 (PDA), an e-book reader, an MP3 (Moving Picture Experts Group Audio Layer III) player, an MP4 (Moving Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a handheld game console, a virtual reality device, an augmented reality device, a desktop speaker, etc. In addition, the speaker provided by the invention can also be applied to various medium-sized or large-sized electronic devices, and the details are not repeated herein.
The following description will be made of a specific structure of the 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;
the magnetic circuit system 30 is fixed in the basin stand 10 and has two end faces which are arranged back to back, a first magnetic gap 30a and a second magnetic gap 30b which are mutually spaced are formed on one end face of the magnetic circuit system 30, a third magnetic gap 30c is formed on the other end face of the magnetic circuit system 30, and the second magnetic gap 30b and the third magnetic gap 30c are arranged back to back and are mutually communicated;
the first vibration system 50 is provided with a first diaphragm 51 and a first voice coil 53, the first diaphragm 51 is covered on the basin frame 10 and is arranged opposite to the first magnetic gap 30a, and the first voice coil 53 is connected to the first diaphragm 51 and is inserted in 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 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 inserted into the second magnetic gap 30b and the third magnetic gap 30 c;
when the second voice coil 73 is energized, the second magnetic gap 30b and the third magnetic gap 30c apply forces in the same direction to the second voice coil 73.
In this embodiment, the speaker 100 is horizontally disposed; the magnetic circuit system 30 is fixed by the basin stand 10; at this time, the upper end surface of the magnetic circuit 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 on 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 (i.e., the first voice coil 53) of the first vibration system 50 is vertically disposed and inserted in 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 (i.e., the second voice coil 73) of the second vibration system 70 is vertically disposed and inserted in the second magnetic gap 30b and the third magnetic gap 30c of the magnetic circuit system 30. The first vibration system 50 and the second vibration system 70 can be used to receive signals of different frequency bands, so as to generate sound waves of different frequency bands, for example: the first vibration system 50 may be configured to receive high frequency signals and radiate high frequency sound waves outward, and the second vibration system 70 may be configured to receive low frequency signals and radiate low frequency sound waves outward.
At this time, it can be understood that the technical solution of the present embodiment is equivalent to providing a new speaker 100 solution with separated high and low frequencies and sharing 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 novel loudspeaker 100 is characterized in that a high-frequency vibration system (such as the first vibration system 50) and a low-frequency vibration system (such as the second vibration system 70) are separated, and the high-frequency vibration system and the low-frequency vibration system share one set of magnetic circuit system 30 for driving, but a front cavity and a rear cavity of the high-frequency system and a front cavity and a rear cavity of the low-frequency system are independent and do not influence each other, so that sound wave radiation of the high-frequency system and sound wave radiation of the low-frequency system are independent and do not influence each other, and pure high-frequency sound signals and pure low-frequency sound signals can be provided. Therefore, the requirements of various small electronic devices on tone quality can be better met, and the requirements of the small electronic devices on tone quality which need to have good high frequency and good low frequency are met.
In other words, the new speaker 100 solution provided by the present embodiment has the following advantages:
(1) the novel loudspeaker 100 scheme provided by the embodiment can realize that one magnetic circuit system 30 can simultaneously generate two sound effects of low frequency and high frequency, and can realize the design of low frequency downward and high frequency upward if the novel loudspeaker is installed in a product; thus, the low frequency can be diffused in all directions due to non-directivity; the high frequency can obtain the maximum radiation due to strong directivity;
(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 usually 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 remaining two magnetic gaps are used to push the diaphragm of the low-frequency system to move, and compared with a method of stacking one low-frequency speaker 100 and one 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, so as to better meet the requirements of various small electronic devices on the sound quality;
(4) if a single speaker 100 system in the prior art is designed to have both high and low frequency sound effects, the sound power will increase and the amplitude will increase. In this way, the reliability risks of the acoustic device are greatly increased, for example: the conditions of wire breakage of the voice coil, membrane rupture of the diaphragm and the like sometimes occur. The novel loudspeaker 100 scheme provided by the embodiment adopts a design of separating a high-frequency system and a low-frequency system, and can overcome the troubles caused by power and amplitude improvement compared with a single loudspeaker 100 system;
(5) the novel loudspeaker 100 scheme provided by this embodiment can ensure that the back cavity of the high-frequency system is completely closed, that is, the front cavity and the back cavity of the high-frequency system and the front cavity and the back cavity of the low-frequency system are independent and do not affect each other, that is, the vibrating diaphragm of the high-frequency system and the vibrating diaphragm of the low-frequency system, and sound waves generated behind the two are not interfered with each other and the sound energy radiation is not weakened due to the phase problem of the sound radiation; meanwhile, the pressure of the air in the back cavity of the high-frequency system can be ensured, so that the resonance frequency of the high-frequency system is reduced, the vibration amplitude of the vibrating diaphragm of the high-frequency system is not too large, and the high-frequency system is protected from being damaged.
(6) The novel loudspeaker 100 scheme provided by the embodiment is also beneficial to realizing the coaxial design of a low-frequency system and a high-frequency system, so that the phenomenon of sound channel separation is avoided, and the subjective listening experience is better.
(7) In the novel loudspeaker 100 scheme provided by this embodiment, the low frequency system adopts a single voice coil double-scroll design (i.e., a single voice coil double magnetic gap), i.e., one voice coil simultaneously obtains the same-direction driving of two magnetic gaps, so that the low frequency energy radiated outwards by the low frequency system or the sensitivity is higher.
As shown in fig. 1, in an embodiment of the loudspeaker 100 of the present invention, 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 located further to the outside of the magnetic circuit system 30 than the first magnetic gap 30 a; in this case, the arrangement of the parts (for example, the blocking portion 13 of the frame 10 described later) for isolating (separating) the rear cavity of the high frequency system and the rear cavity of the low frequency system from each other is also simpler and more convenient, and has good stability and reliability, so that the reliability of the entire 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 path portion 31;
an intermediate magnetic path portion 33, the intermediate magnetic path portion 33 being enclosed outside the inner magnetic path portion 31 and spaced apart from the inner magnetic path portion 31 to form the first magnetic gap 30 a; and
an outer magnetic circuit portion 35, said outer magnetic circuit portion 35 being disposed around said middle magnetic circuit portion 33 and spaced from said middle magnetic circuit portion 33 to form said second magnetic gap 30b and said third magnetic gap 30 c.
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 both are disposed in a ring shape; the arrangement of the first magnetic gap 30a and the second magnetic gap 30b is equivalent to the form of sleeving an outer ring outside the inner ring, namely the first magnetic gap and the second magnetic gap realize nesting in the horizontal direction; at this time, the third magnetic gap 30c is provided on the other side of the magnetic circuit system 30, and is provided opposite to and in communication with the second magnetic gap 30 b. Thus, the radial full utilization of the magnetic circuit system 30 and the full utilization of different end faces of the magnetic circuit system 30 can be realized, so that the height of the magnetic circuit system 30 can be reduced, the axial size of the loudspeaker 100 can be reduced, and the loudspeaker can be better adapted to various small electronic devices.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the inner magnetic path portion 31 includes a first magnetic conductive plate 311, a first magnet 313 and a second magnetic conductive plate 315; the first magnet 313 is clamped between the first magnetic conduction plate 311 and the second magnetic conduction plate 315, and an outer edge of the second magnetic conduction plate 315 extends outwards;
the intermediate magnetic circuit portion 33 comprises a second magnet 331 and a third magnetically permeable plate 333; the second magnet 331 is stacked on the surface of the second magnetic conduction plate 315, where the first magnet 313 is disposed, and is disposed around the first magnet 313 along the circumferential direction of the second magnetic conduction 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 an inner edge thereof is spaced from an outer edge of the first magnetic conductive plate 311 to form the first magnetic gap 30 a;
the outer magnetic circuit portion 35 includes a fourth magnetic conductive plate 351, a third magnet 353, and a fifth magnetic conductive plate 355; the third magnet 353 is arranged around the second magnet 331 along the circumferential direction of the second magnet 331, and is spaced from the second magnet 331; the fourth magnetic conductive plate 351 and the fifth magnetic conductive plate 355 are respectively stacked on two oppositely-arranged surfaces of the third magnet 353; the fourth magnetic conduction plate 351 is arranged around the third magnetic conduction plate 333 along the circumferential direction of the third magnetic conduction plate 333, and is arranged at an interval with the third magnetic conduction plate 333 to form the second magnetic gap 30 b; the fifth magnetic conductive plate 355 is disposed outside the second magnetic conductive plate 315 along the circumferential direction of the second magnetic conductive plate 315, and is disposed at an interval from the second magnetic conductive plate 315 to form the third magnetic gap 30 c.
It can be understood that, under the design of the present embodiment, the inner magnetic path portion 31 formed by the first magnetic conductive plate 311, the first magnet 313 and the second magnetic conductive plate 315 is located inside the first magnetic gap 30a, which can provide a powerful magnetic field environment for the first voice coil 53 in the first magnetic gap 30 a; meanwhile, the outer side of the first magnetic gap 30a is the middle magnetic circuit part 33 formed by the second magnet 331 and the third magnetic conductive plate 333, which can also provide a powerful magnetic field environment for the first voice coil 53 in the first magnetic gap 30 a; thus, the first voice coil 53 inserted in the first magnetic gap 30a can be supported by the multiple magnets, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving with a single magnet, and improve the acoustic performance of the first vibration system 50.
Similarly, inside the second magnetic gap 30b is the middle magnetic circuit portion 33 composed of the second magnet 331 and the third magnetic conductive plate 333, which can provide a powerful magnetic field environment for the second voice coil 73 in the second magnetic gap 30 b; meanwhile, the outer side of the second magnetic gap 30b is 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, which can also provide a powerful magnetic field environment for the second voice coil 73 in the second magnetic gap 30 b; thus, the second voice coil 73 inserted into the second magnetic gap 30b can be supported by the multiple magnets, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving with 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 middle magnetic circuit portion 33 formed by the second magnet 331 and the third magnetic conductive plate 333, which can provide a powerful magnetic field environment for the second voice coil 73 in the third magnetic gap 30 c; meanwhile, the outer side of the third magnetic gap 30c is 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, which can also provide a powerful magnetic field environment for the second voice coil 73 in the third magnetic gap 30 c; thus, the second voice coil 73 inserted into the third magnetic gap 30c can be supported by the multiple magnets, so as to avoid the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by driving with a single magnet, and improve the acoustic performance of the second vibration system 70.
That is, in the present embodiment, the magnetic circuit system 30 is subjected to multi-magnet layout, and the driving of the high-frequency system and the low-frequency system is enhanced, so that the problems of insufficient driving capability, high distortion, poor acoustic performance and the like caused by the fact that a single magnet is subjected to multi-system driving are avoided, and the acoustic performance of the loudspeaker 100 is improved.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the frame 10 includes a cylindrical body 11, the cylindrical body 11 has a first end 111 and a second end 113, and both the first end 111 and the second end 113 are open;
the magnetic circuit system 30 is fixed in the barrel portion 11, the first magnetic gap 30a and the second magnetic gap 30b are provided toward the opening of the first end 111, and the third magnetic gap 30c is provided toward the opening of the second end 113;
the first diaphragm 51 is covered at the first end 111, and the second diaphragm 71 is covered at the second end 113.
In this embodiment, the barrel 11 is vertically disposed, and the first end 111 is disposed upward and the second end 113 is disposed downward. The magnetic circuit system 30 is fixed in the cylinder 11 and is located in the middle of the cylinder 11; the first vibration system 50 is fixed in the cylindrical body 11, with its diaphragm (i.e., the first diaphragm 51) located at the upper portion of the cylindrical body 11, and its voice coil (i.e., the first voice coil 53) extended from the upper portion of the cylindrical body 11 to the lower portion of the cylindrical body 11 until it is inserted into the first magnetic gap 30 a; the second vibration system 70 is fixed in the cylindrical body 11, with its diaphragm (i.e., the second diaphragm 71) located at the lower portion of the cylindrical body 11, and its voice coil (i.e., the second voice coil 73) extended from the lower portion of the cylindrical body 11 to the upper portion of the cylindrical body 11 until it passes through the third magnetic gap 30c and is inserted into the second magnetic gap 30 b.
It can be understood that, since the first vibration system 50 and the second vibration system 70 need to respond optimally to signals of 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 this 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 area of the different portions of the cylindrical body 11 will be adaptively changed in accordance with the sizes of the first diaphragm 51 and the second diaphragm 71, for example: in this embodiment, the cylinder 11 is formed with a first cylinder section at the covering position of the first diaphragm 51, so that the outer edge of the first diaphragm 51 is connected and fixed (specifically, the fixing can be realized by using a bonding method, etc.); meanwhile, the cylinder 11 is formed with a second cylinder at the covering position of the second diaphragm 71, so that the outer edge of the second diaphragm 71 is connected and fixed (specifically, the fixing can be realized by using a bonding method, etc.); at this time, the first cylinder section is retracted inward compared to the second cylinder section, i.e. the surrounding area of the first cylinder section is smaller than that of the second cylinder section.
It can be understood that, under the design of this embodiment, the frame 10 accommodates and fixes the magnetic circuit system 30, the first vibration system 50 and the second vibration system 70 through the barrel portion 11 thereof, so that the loudspeaker 100 has better integrity and higher reliability, which 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 loudspeaker 100.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the frame 10 further includes a blocking portion 13, the blocking portion 13 is protruded from an inner wall surface of the first end 111 and is circumferentially disposed along the circumferential direction of the barrel 11, and an end of the blocking portion 13 facing away from the inner wall surface of the barrel 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 back cavity of the first vibration system 50 and a back cavity of the second vibration system 70 are independent from each other. Specifically, one end of the blocking portion 13, which is away from the inner wall surface of the barrel portion 11, abuts against the intermediate magnetic path portion 33.
It can be understood that, under the design of this 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 and the front cavity and the rear cavity of the low-frequency system are independent and do not affect each other, that is, the diaphragm of the high-frequency system and the diaphragm of the low-frequency system, and the sound waves generated behind the two are not interfered with each other, and the sound energy radiation is not attenuated due to the phase problem of the sound radiation; meanwhile, the pressure of the air in the back cavity of the high-frequency system can be ensured, so that the resonance frequency of the high-frequency system is reduced, the vibration amplitude of the vibrating diaphragm of the high-frequency system is not too large, and the high-frequency system is protected from being damaged.
Furthermore, it can be understood that, in the design of the present embodiment, the first magnetic gap 30a and the second magnetic gap 30b can be separated by the blocking portion 13 on the inner wall surface of the first end 111 of the barrel portion 11, and the structure is simple and the reliability is high. Meanwhile, the blocking portion 13 may also play a role in supporting and positioning the magnetic circuit system 30, so as to help the magnetic circuit system 30 enhance its own stability, so as to facilitate stable cooperation of the magnetic circuit system 30 with the first vibration system 50 and the second vibration system 70, so as to improve the acoustic performance of the speaker 100.
In addition, the end surface of the blocking portion 13 facing away from the inner wall surface of the cylindrical portion 11 and the upper end surface of the magnetic path system 30 may be hermetically connected by, for example, adhesive bonding or the like, so as to further enhance the isolation effect and enhance the stability of the magnetic path system 30.
As shown in fig. 1, in an embodiment of the speaker 100 of the present invention, the second diaphragm 71, the magnetic circuit system 30, the cylindrical body 11, and the blocking portion 13 enclose a rear cavity of the second vibration system 70, and the second end 113 is opened 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 barrel portion 11 and the blocking portion 13 also enclose to form a back cavity, which is the back cavity of the first vibration system 50, i.e. the back cavity of the high-frequency system; the back cavity enclosed by the second diaphragm 71, the magnetic circuit system 30, the barrel 11, and the blocking portion 13 is the back cavity of the second vibration system 70, i.e., the back cavity of the low frequency system.
The two back cavities not only respectively keep the independence of the two back cavities, but also avoid the problem that the sound energy radiation is weakened caused by the phase problem of the sound radiation; and wherein the rear chamber of low frequency system has still utilized the pressure release hole 1131 in side to realize with external intercommunication:
thus, the air pressure change in the rear cavity of the low-frequency system can be adjusted through the pressure relief hole 1131, the influence on the amplitude of the diaphragm of the low-frequency system caused by too large or too small air pressure in the rear cavity of the low-frequency system is avoided, and the influence on the sound sensitivity of the low-frequency system is avoided; that is, the resistance when the vibrating diaphragm of the low-frequency system vibrates is reduced, so that the vibrating diaphragm of the low-frequency system can reach the maximum linear displacement 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 connected to the second diaphragm 71 while being inserted in the second magnetic gap 30b and the third magnetic gap 30 c;
a first voice coil section 733, wherein the first voice coil section 733 is wound around the voice coil pipe 731 and inserted into the second magnetic gap 30 b; and
a second voice coil section 735, wherein the second voice coil section 735 is wound around the voice coil pipe 731 and inserted into the third magnetic gap 30 c;
when the second voice coil 73 is energized, the third magnetic gap 30c receives a force from the second voice coil section 735 in the same direction as the second magnetic gap 30b receives a force from the first voice coil section 733.
The inner magnetic path portion 31 includes a first magnetic conductive plate 311, a first magnet 313 and a second magnetic conductive plate 315; the intermediate magnetic circuit portion 33 includes a second magnet 331 and a third magnetically permeable plate 333; the arrangement of magnetic circuit system 30 including fourth magnetic conductive plate 351, third magnet 353 and fifth magnetic conductive plate 355 "in outer magnetic circuit portion 35 is exemplary, then:
in this magnetic circuit system 30, the direction of the lines of magnetic induction in the second magnetic gap 30b is exactly opposite to the direction of the lines of magnetic induction in the third magnetic gap 30 c; therefore, when the second voice coil 73 needs to be energized, the current flow in the first voice coil section 733 is also opposite to the current flow in the second voice coil section 735. Thus, the second voice coil 73 in the power-on state can simultaneously obtain the same-direction driving force provided by the two magnetic gaps, so that the low-frequency energy radiated outside by the low-frequency system or the sensitivity is higher.
In order to make the current flow direction in the first voice coil section 733 and the current flow direction in the second voice coil section 735 opposite to each other when the second voice coil 73 is energized, at least the following configurations can be adopted:
(1) the input end and the output end of the first voice coil section 733 and the input end and the output end of the second voice coil section 735 are independent and do not interfere with each other, so that the control of the current flowing direction in the first voice coil section 733 and the control of the current flowing direction in the second voice coil section 735 are 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 around the voice coil tube 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 coil section 733 and the second 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 around the voice coil tube 731, respectively; in this case, the first voice coil section 733 and the second voice coil section 735 are wound in opposite directions on the voice coil tube 731;
(3) the first coil section 733 and the second coil section 735 are arranged 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 on the voice coil tube 731; in this case, the first and second voice coil sections 733 and 735 are wound in opposite directions on the voice coil tube 731 (as shown in fig. 2).
Compared with the first two configurations, the third configuration can be completed by only winding one voice coil wire, and the design in terms 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 present invention also proposes an electronic device, which includes the loudspeaker 100 as described above, and the specific structure of the loudspeaker 100 refers to the foregoing embodiments. Since the electronic device adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by all the technical solutions of all the embodiments are achieved, and no further description is given here. The electronic device further includes an electronic control component, the electronic control component includes a frequency divider, and the speaker 100 is electrically connected to the frequency divider.
It is understood that the electronic device may be, but is not limited to, a mobile phone, a tablet computer, a television, a display, a notebook computer, a Digital photo frame, a Personal Digital Assistant (PDA), an e-book reader, an MP3 (motion Picture Experts Group Audio Layer III) player, an MP4 (motion Picture Experts Group Audio Layer IV) player, a wearable device, a navigator, a handheld game console, a virtual reality device, an augmented reality device, a sound box desktop, 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 this embodiment, before the low frequency system and the high frequency system, the frequency divider may be used to perform frequency division processing on the signal, so that frequency division input of the signal may be achieved — the high frequency signal enters the high frequency system, the low frequency signal enters the low frequency system, the high frequency signal and the low frequency signal perform their own separate paths (where, the high frequency signal and the low frequency signal may also have appropriate overlap), and the operating frequency band advantages of the high frequency system and the low frequency system are fully utilized. Therefore, the playback characteristics of different frequency bands can be more balanced under the condition that the safe operation of systems of different frequency bands is ensured and the full play of the functions is realized.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (10)

1. A loudspeaker, comprising:
a basin stand;
the magnetic circuit system is fixed in the basin frame and is provided with two end faces which are arranged back to back, 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 back to back 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 arranged on the basin frame in a covering mode and is opposite to the first magnetic gap, and the first voice coil is connected to 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 arranged on the basin frame in a covering mode and is opposite to the third magnetic gap, and the second voice coil is connected to the second vibrating diaphragm and is inserted into the second magnetic gap and the third magnetic gap at the same time;
when the second voice coil is electrified, the second magnetic gap and the third magnetic gap give acting force to the second voice coil in the same direction.
2. The loudspeaker of claim 1, wherein the first magnetic gap is located inside the second magnetic gap.
3. A loudspeaker according to claim 2, wherein the magnetic circuit system comprises:
an inner magnetic path portion;
an intermediate magnetic circuit portion enclosed outside the inner magnetic circuit portion and spaced from the inner magnetic circuit portion to form the first magnetic gap; and
an outer magnetic circuit portion disposed around and spaced apart from the intermediate magnetic circuit portion to form the second and third magnetic gaps.
4. A loudspeaker according to claim 3, wherein the inner magnetic path 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 middle magnetic circuit part comprises a second magnet and a third magnetic conductive plate; the second magnet is overlapped on the surface of the second magnetic conduction plate, which is provided with the first magnet, is arranged outside the first magnet in a surrounding manner along the circumferential direction of the second magnetic conduction plate, and is arranged at intervals with the first magnet; the third magnetic conduction plate is stacked on the surface of the second magnet, which is back 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 in a surrounding manner along the circumferential direction of the second magnet 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 oppositely arranged surfaces of the third magnet; the fourth magnetic conduction plate is arranged outside the third magnetic conduction plate in the circumferential direction of the third magnetic conduction plate and is arranged at intervals with the third magnetic conduction plate to form the second magnetic gap; and the fifth magnetic conduction plate is arranged outside the second magnetic conduction plate in a surrounding manner along the circumferential direction of the second magnetic conduction plate 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, both of the first end and the second end being open;
the magnetic circuit system is fixed in the cylinder body part, 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 diaphragm cover is arranged at the first end, and the second diaphragm cover is arranged at the second end.
6. The loudspeaker according to claim 5, wherein the frame further comprises a blocking portion protruding from an inner wall surface of the first end and circumferentially surrounding the cylindrical portion, and an end of the blocking portion facing away from the inner wall surface of the cylindrical portion 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 to make the back cavity of the first vibration system and the back cavity of the second vibration system independent from each other.
7. The loudspeaker according to claim 5, wherein the second diaphragm, the magnetic circuit system, the cylindrical body portion and the blocking portion enclose a rear cavity of the second vibration system, and the second end is provided with a pressure relief hole communicated with the rear cavity of the second vibration system.
8. The loudspeaker of any one of claims 1 to 7, wherein the second voice coil comprises:
a voice coil tube connected to the second diaphragm and inserted into the second magnetic gap and the third magnetic gap at the same time;
the first voice coil section is wound on the voice coil tube and inserted in the second magnetic gap; and
the second voice coil section is wound on the voice coil tube and inserted in the third magnetic gap;
when the second voice coil is electrified, the acting force from the third magnetic gap on the second voice coil section is in the same direction as the acting force from the second magnetic gap on the first voice coil section.
9. The loudspeaker of claim 8 wherein said first voice coil section and said second voice coil section are arranged in series, said first voice coil section and said second voice coil section being wound in opposite directions around said voice coil tube.
10. An electronic device, characterized in that it comprises a loudspeaker as claimed in any one of claims 1 to 9.
CN202210114189.1A 2022-01-30 2022-01-30 Speaker and electronic apparatus Pending CN114449420A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210114189.1A CN114449420A (en) 2022-01-30 2022-01-30 Speaker and electronic apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210114189.1A CN114449420A (en) 2022-01-30 2022-01-30 Speaker and electronic apparatus

Publications (1)

Publication Number Publication Date
CN114449420A true CN114449420A (en) 2022-05-06

Family

ID=81371262

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210114189.1A Pending CN114449420A (en) 2022-01-30 2022-01-30 Speaker and electronic apparatus

Country Status (1)

Country Link
CN (1) CN114449420A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115119115A (en) * 2022-07-26 2022-09-27 歌尔股份有限公司 Sound generating device and electronic equipment

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115119115A (en) * 2022-07-26 2022-09-27 歌尔股份有限公司 Sound generating device and electronic equipment
CN115119115B (en) * 2022-07-26 2023-02-07 歌尔股份有限公司 Sound generating device and electronic equipment

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