CN110856087B - Speaker and electronic apparatus - Google Patents
Speaker and electronic apparatus Download PDFInfo
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- CN110856087B CN110856087B CN201911178049.5A CN201911178049A CN110856087B CN 110856087 B CN110856087 B CN 110856087B CN 201911178049 A CN201911178049 A CN 201911178049A CN 110856087 B CN110856087 B CN 110856087B
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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
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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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- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
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- Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
Abstract
The invention discloses a speaker and an electronic apparatus. The loudspeaker comprises a control unit, a vibration system and a magnetic circuit system with a magnetic gap, wherein the vibration system comprises a vibrating diaphragm and a voice coil assembly arranged corresponding to the magnetic gap, the voice coil assembly comprises a framework voice coil and a driving voice coil, one end of the framework voice coil is connected to the vibrating diaphragm, and the driving voice coil is connected to the other end of the framework voice coil; the control unit is used for controlling the framework voice coil to be electrified when the framework voice coil moves to a first position in a direction close to the magnetic gap; the control unit is also used for controlling the framework voice coil to be powered off when the framework voice coil moves to the second position in the direction away from the magnetic gap. Thus, not only the acoustic performance of the speaker can be ensured/improved, but also the power consumption of the speaker can be reduced.
Description
Technical Field
The invention relates to the technical field of sound and electricity equipment, in particular to a loudspeaker and electronic equipment.
Background
The micro-speaker is widely applied to portable electronic equipment such as mobile phones, notebook computers, hearing aids and the like. With the rapid development of these portable electronic devices, there is an increasing demand for miniature electro-acoustic devices to be used therein. Among them, the voice coil assembly is an important part of the micro-speaker.
In the related art, in order to obtain a larger amplitude for the speaker, the distance between (Dome of) the diaphragm and the magnetic gap needs to be increased, so that a connection framework needs to be additionally arranged between the driving voice coil and the diaphragm of the voice coil assembly, and the connection framework connects the driving voice coil and the diaphragm, so that the maximum amplitude of the speaker can be increased, and heat generated by the driving voice coil can be dissipated to protect the diaphragm or the centering support piece.
However, in the above scheme, since the connection frame is additionally arranged between the driving voice coil and the diaphragm, the weight of the voice coil assembly is increased, and the sensitivity of the loudspeaker is affected.
Disclosure of Invention
The invention mainly aims to provide a loudspeaker, and aims to solve the technical problem that in the related art, the connection framework influences the sensitivity of the loudspeaker.
To achieve the above object, the present invention provides a speaker, including:
a magnetic circuit system having a magnetic gap;
the vibration system comprises a vibrating diaphragm and a voice coil assembly arranged corresponding to the magnetic gap, the voice coil assembly comprises a framework voice coil and a driving voice coil, one end of the framework voice coil is connected to the vibrating diaphragm, and the driving voice coil is connected to the other end of the framework voice coil; and
the control unit is used for controlling the framework voice coil to be electrified when the framework voice coil moves to a first position in a direction close to the magnetic gap; the control unit is also used for controlling the framework voice coil to be powered off when the framework voice coil moves to the second position in the direction away from the magnetic gap.
Optionally, the control unit includes a control switch connected in series with the bobbin voice coil, and the control switch has an on state when the bobbin voice coil moves to a first position in a direction close to the magnetic gap, and an off state when the bobbin voice coil moves to a second position in a direction away from the magnetic gap.
Optionally, the first position and the second position are the same position.
Optionally, the control unit further includes a detection unit, and the detection unit is configured to detect a movement position of the bobbin voice coil.
Optionally, the detection unit includes a position sensor, and the position sensor is configured to detect a moving position of the bobbin voice coil at a fixed point or in real time; alternatively, the first and second electrodes may be,
the detection unit comprises a detection circuit, and the detection circuit is used for detecting a voltage parameter or a current parameter of the driving voice coil so as to detect the motion position of the framework voice coil.
Optionally, the bobbin voice coil is connected in parallel with the driving voice coil.
Optionally, the bobbin voice coil is connected in series with the driving voice coil;
the loudspeaker is characterized in that the loudspeaker further comprises a bypass circuit connected in parallel with the framework voice coil and the control switch, a bypass switch is arranged on the bypass circuit, the bypass switch is provided with a disconnection state when the framework voice coil moves to the first position in the direction close to the magnetic gap and a connection state when the framework voice coil moves to the second position in the direction far away from the magnetic gap.
Optionally, the driving voice coil includes a plurality of sub voice coils connected in sequence.
Optionally, at least two of the sub-voice coils are connected in series, and the detection unit of the control unit includes a detection circuit for detecting a potential difference at the point where two of the sub-voice coils are connected in series.
Optionally, the electrical conductivity of the wire of the bobbin voice coil is smaller than the electrical conductivity of the wire of the driving voice coil; and/or the presence of a gas in the gas,
the radial thickness of the framework voice coil is smaller than that of the driving voice coil; and/or the presence of a gas in the gas,
the axial length of the framework voice coil is smaller than that of the driving voice coil.
Optionally, the skeleton voice coil loudspeaker voice coil adopts autohension enameled wire coiling to form, the drive voice coil loudspeaker voice coil adopts autohension enameled wire coiling to form, the skeleton voice coil loudspeaker voice coil with the drive voice coil loudspeaker voice coil is connected through the autohension lacquer of autohension enameled wire.
Optionally, the wire of the bobbin voice coil is a copper-clad aluminum enameled wire or an aluminum enameled wire.
The invention also provides electronic equipment which comprises a shell and the loudspeaker, wherein the loudspeaker is arranged on the shell. The speaker includes:
a magnetic circuit system having a magnetic gap;
the vibration system comprises a vibrating diaphragm and a voice coil assembly arranged corresponding to the magnetic gap, the voice coil assembly comprises a framework voice coil and a driving voice coil, one end of the framework voice coil is connected to the vibrating diaphragm, and the driving voice coil is connected to the other end of the framework voice coil; and
the control unit is used for controlling the framework voice coil to be electrified when the framework voice coil moves to a first position in a direction close to the magnetic gap; the control unit is also used for controlling the framework voice coil to be powered off when the framework voice coil moves to the second position in the direction away from the magnetic gap.
When the loudspeaker works, the framework voice coil can be electrified when moving to the first position in the direction close to the magnetic gap, so that the electrified framework voice coil generates (additional) driving force to drive the voice coil assembly and the vibrating diaphragm to vibrate, the sensitivity of the loudspeaker is improved, and the acoustic performance of the loudspeaker is improved. And the drive voice coil can be powered off when moving to the second position in the direction away from the magnetic gap so as to reduce power consumption.
Therefore, the driving voice coil is powered on after entering the region with the dense magnetic induction lines and powered off after entering the region with the sparse magnetic induction lines, so that the power-on state of the framework voice coil is controlled according to the magnetic field distribution of the loudspeaker, the invalid power-on time of the framework voice coil can be reduced, the sensitivity of the loudspeaker can be improved, the acoustic performance of the loudspeaker can be improved, and the power consumption of the loudspeaker can be reduced.
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 diagram of an exploded structure of an embodiment of a loudspeaker of the present invention;
FIG. 2 is a schematic view of the voice coil assembly of FIG. 1;
FIG. 3 is a schematic diagram of a voice coil assembly in a state within a magnetic gap in a loudspeaker according to the present invention; wherein, the framework voice coil is positioned in a region with sparser magnetic induction lines;
FIG. 4 is a schematic view of the voice coil assembly of FIG. 3 in an alternate configuration within the magnetic gap; wherein, the skeleton voice coil is arranged in a region with densely distributed magnetic induction lines.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 100 | |
40 | |
| 10 | |
50 | Magnetic |
| 11 | |
60 | Central |
| 12 | |
61 | |
| 121 | First |
62 | Central |
| 122 | |
70 | Side |
| 20 | |
71 | |
| 21 | |
72 | Edge |
| 22 | |
90 | |
| 30 | Magnetic gap |
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 if the description of "first", "second", etc. is provided in the embodiment of the present invention, the description of "first", "second", etc. is only for descriptive purposes and is not to be construed as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature.
In addition, the meaning of "and/or" appearing throughout is to include three juxtapositions, exemplified by "A and/or B" including either scheme A, or scheme B, or a scheme in which both A and B are satisfied.
The invention provides a loudspeaker.
Optionally, the speaker is used in an electronic device, such as a portable electronic device like a mobile phone, MP3, a tablet computer, a laptop computer, a hearing aid, etc.
In one embodiment of the present invention, the speaker 100 includes a magnetic circuit system and a vibration system. Specifically, as shown in fig. 1, the speaker 100 generally further includes a frame 40, and the magnetic path system and the vibration system are mounted on the frame 40.
Wherein the magnetic circuit system has a magnetic gap 30, as shown in fig. 3 and 4. In the specific embodiment, the structure of the magnetic circuit system is various, and the following description is only illustrative, but not intended to limit the invention.
Specifically, as shown in fig. 1, 3 and 4, in one embodiment of the magnetic circuit system, the magnetic circuit system includes a magnetic conductive yoke 50 mounted to the frame 40, and a center magnetic circuit 60 and a side magnetic circuit 70 mounted to the magnetic conductive yoke 50. The central magnetic circuit 60 comprises a central magnet 61 mounted on the magnetic yoke 50, and a central magnetic conductive plate 62 arranged on the central magnet 61; the side magnetic circuit 70 comprises a side magnet 71 mounted on the magnetic yoke 50 and a side magnetic conductive plate 72 arranged on the side magnet 71; the edge magnets 71 and the edge magnetic plates are distributed around the central magnet 61, and a magnetic gap 30 is formed between the central magnetic conductive plate 62 and the edge magnetic conductive plate 72.
Of course, in other embodiments, the magnetic circuit system may be configured in other configurations, for example, in another embodiment of the magnetic circuit system, the magnetic circuit system includes a T-iron mounted on the frame 40 and a side magnetic circuit 70 mounted on the base of the T-iron, the side magnetic circuit 70 includes a side magnet 71 and a side magnetic plate 72 disposed on the side magnet 71, and the upper end of the pillar of the T-iron and the side magnetic plate 72 of the side magnetic circuit 70 form the magnetic gap 30 therebetween. For another example, in another embodiment of the magnetic circuit system, the magnetic circuit system includes a U-iron mounted on the frame 40 and a central magnetic circuit 60 mounted on the bottom plate of the U-iron, the central magnetic circuit 60 includes a central magnet 61 and a central magnetic conductive plate 62 disposed on the side magnet 71, and a magnetic gap 30 is formed between the upper end of the side wall of the U-iron and the central magnetic conductive plate 62 of the central magnetic circuit 60; and so on.
Wherein, the vibration system comprises a diaphragm 20 and a voice coil assembly 10 arranged corresponding to the magnetic gap 30. Specifically, the diaphragm 20 is mounted on the frame 40, and one end of the voice coil assembly 10 is connected to the diaphragm 20, and the other end extends into the magnetic gap 30. A magnetic field is generated in the magnetic gap 30, and during the operation of the speaker 100, the voice coil assembly 10 is energized, the energized voice coil assembly 10 is stressed in the magnetic field to generate vibration, and the vibrating voice coil assembly 10 drives the vibrating diaphragm 20 to vibrate together, so that the vibrating diaphragm 20 drives the air to sound.
In this embodiment, as shown in fig. 1 and 2, the bobbin voice coil 11 and the driving voice coil 12, one end of the bobbin voice coil 11 is connected to the diaphragm 20, the driving voice coil 12 is connected to the other end of the bobbin voice coil 11, and one end of the driving voice coil 12, which is far away from the bobbin voice coil 11, extends into the magnetic gap 30.
Specifically, the driving voice coil 12 is used for being connected to an external circuit, and when the speaker 100 operates, the driving voice coil 12 is powered on, and the powered driving voice coil 12 is stressed in a magnetic field in the magnetic gap 30 to generate vibration, so as to drive the diaphragm 20 to vibrate together, thereby driving the air to sound by the diaphragm 20.
Specifically, as shown in fig. 1, the bobbin 11 connects the driving voice coil 12 and the diaphragm 20, and the axial length of the voice coil assembly 10 (i.e. the extending direction of the center line of the voice coil assembly 10) can be increased, so that not only the maximum amplitude of the loudspeaker 100 can be increased, but also the rigid connection between the voice coil assembly 10 and (Dome 22 of) the diaphragm 20 can be improved.
Further, as shown in fig. 2 to 4, the bobbin voice coil 11 is further configured to be connected to an external circuit, and the speaker 100 further includes a control unit (not shown) configured to control the bobbin voice coil 11 to be powered on (i.e., control the bobbin voice coil 11 to be in a conducting state with the external circuit) when the bobbin voice coil 11 moves to a first position in a direction close to the magnetic gap 30; the control unit is further configured to control the bobbin voice coil 11 to be powered off (i.e., control the bobbin voice coil 11 to be in a disconnected state with an external circuit) when the bobbin voice coil 11 moves to a second position in a direction away from the magnetic gap 30.
It can be understood that in the direction approaching the magnetic gap 30, the density of the magnetic induction lines increases gradually, and the magnetic field strength increases gradually; in a direction away from the magnetic gap 30, the density of the magnetic induction lines gradually decreases, and the magnetic field strength gradually decreases.
By designing the positions of the first and second positions, as shown in fig. 4, it is possible to make: the bobbin voice coil 11 moves to the first position in the direction close to the magnetic gap 30 and then enters the region with the dense magnetic induction lines, in the region, the magnetic induction lines are distributed densely, the magnetic field intensity is large, and the bobbin voice coil 11 can generate large driving force after being electrified, so that the sensitivity of the loudspeaker 100 can be improved.
As shown in fig. 3, it is also possible to make: the framework voice coil 11 moves to a second position in the direction far away from the magnetic gap 30 and then enters a region with sparsely distributed magnetic induction lines, the magnetic induction lines are sparsely distributed in the region and the magnetic field intensity is smaller, if the framework voice coil 11 is continuously electrified, only power consumption is increased, but effective driving force cannot be generated, and therefore, the power failure can be reduced after the framework voice coil 11 moves to the second position in the direction far away from the magnetic gap 30; at this time, it should be noted that driving the voice coil 12 can generate a sufficient driving force to ensure the sensitivity of the speaker 100.
In the loudspeaker 100 of the present invention, when the loudspeaker 100 is in operation, the bobbin voice coil 11 is energized when moving to the first position in a direction close to the magnetic gap 30, so that the energized bobbin voice coil 11 generates (additional) driving force to drive the voice coil assembly 10 and the diaphragm 20 to vibrate, thereby improving the sensitivity of the loudspeaker 100 and thus improving the acoustic performance of the loudspeaker 100. And the bobbin voice coil 11 can be de-energized when moved to the second position in a direction away from the magnetic gap 30 to reduce power consumption.
Thus, the driving voice coil 12 is powered on after entering the region with dense magnetic induction lines and powered off after entering the region with sparse magnetic induction lines, so that the power-on state of the bobbin voice coil 11 is controlled according to the magnetic field distribution of the loudspeaker 100, the invalid power-on time of the bobbin voice coil 11 can be reduced, the sensitivity of the loudspeaker 100 can be improved, the acoustic performance of the loudspeaker 100 can be improved, and the power consumption of the loudspeaker 100 can be reduced.
In a specific embodiment, the positions of the first position and the second position may be designed according to the distribution of the magnetic induction lines, the axial length ratio of the bobbin voice coil 11 to the driving voice coil 12, and the position of the voice coil assembly 10 in the magnetic gap 30 in the balanced state, so as to improve the vibration stability and symmetry of the voice coil assembly 10, and thus improve the overall acoustic performance of the loudspeaker 100.
Of course, in order to reduce the design difficulty and reduce the development and production costs, the first position and the second position may be the same position.
In this embodiment, the first position and the second position are the same position. Specifically, the position is disposed on a side of the magnetic gap 30 close to the diaphragm 20 (i.e., an upper side in the state shown in fig. 2 and 3), for example, the position may be disposed on a surface of the side magnetic conductive plate 72 or the center magnetic conductive plate 62 facing the diaphragm 20 (i.e., an upper surface in the state shown in fig. 2 and 3), or may be disposed at a predetermined distance from an upper surface of the magnetic conductive plate or the center magnetic conductive plate 62. Therefore, the framework voice coil 11 can be powered on after entering a region with dense magnetic induction lines, and powered off after entering a region with sparse magnetic induction lines.
Further, the control unit includes a control switch connected in series with the bobbin voice coil 11, and the control switch has an on state when the bobbin voice coil 11 moves to a first position in a direction close to the magnetic gap 30 and an off state when the bobbin voice coil 11 moves to a second position in a direction away from the magnetic gap 30. Alternatively, the control switch may be provided on the lead of the bobbin voice coil 11, or may be provided in an external circuit.
Specifically, when the bobbin voice coil 11 moves in a direction close to the magnetic gap 30 and moves to the first position, the control unit controls the control switch to the on state, so that the bobbin voice coil 11 is powered on; when the bobbin voice coil 11 moves in a direction away from the magnetic gap 30 and moves to the second position, the control unit controls the control switch to the off state, so that the bobbin voice coil 11 is deenergized.
In this way, the on/off state of the bobbin voice coil 11 is controlled to be switched on or off.
Specifically, the control switch may be disposed in the internal space of the speaker 100, may be disposed on the surface of the speaker 100, and may be disposed on the control circuit board of the electronic device.
It should be noted that the switch form of the control switch is not limited in the present invention, and may be physical (such as a relay, a microswitch, or the like), or may be circuit design (such as an integrated circuit, or the like), and the like.
Further, the control unit further comprises a detection unit, and the detection unit is used for detecting the movement position of the framework voice coil 11. In this way, the control unit can control the on/off of the control switch according to the position of the bobbin voice coil 11 detected by the detection unit, so as to control the power-on state of the bobbin voice coil 11.
In an embodiment of the detection unit, the detection unit comprises a position sensor for fixed-point detection or real-time detection of the motion position of the bobbin voice coil 11.
Specifically, in the scheme of using the position sensor to detect the moving position of the bobbin voice coil 11 at a fixed point, the position sensor may be an infrared sensor, the transmitting portion of the position sensor is disposed on the central magnetic conductive plate 62 or the side magnetic plate, and the receiving portion of the position sensor is correspondingly disposed on the voice coil assembly 10 or the diaphragm 20, when the bobbin voice coil 11 moves to the first position or the second position, the signal transmitted by the transmitting portion of the position sensor is received by the receiving portion to detect that the bobbin voice coil 11 moves to the first position or the second position. It should be noted that, when the first position and the second position are the same position, one position sensor may be provided, and when the bobbin voice coil 11 moves to the position for the first time, it indicates that the bobbin voice coil 11 moves to the first position in a direction close to the magnetic gap 30; then, when the bobbin voice coil 11 moves to this position for an even number of second, fourth, etc., it means that the bobbin voice coil 11 moves to the second position in a direction away from the magnetic gap 30; when the bobbin voice coil 11 moves to this position an odd number of times, such as third, fifth, etc., it means that the bobbin voice coil 11 moves to the first position in a direction approaching the magnetic gap 30. When the first position and the second position are different positions, two position sensors may be provided, where one position sensor is used to detect that the bobbin voice coil 11 moves to the first position in the direction approaching the magnetic gap 30 (for example, when the receiving portion of the position sensor receives the signal from the transmitting portion for the odd number of times, it indicates that the bobbin voice coil 11 moves to the first position in the direction approaching the magnetic gap 30, and when the receiving portion of the position sensor receives the signal from the transmitting portion for the even number of times, it ignores), and the other position sensor is used to detect that the bobbin voice coil 11 moves to the second position in the direction away from the magnetic gap 30.
In the scheme of using a position sensor to detect the motion position of the bobbin voice coil 11 in real time, the position sensor may be a laser sensor, etc., and the position sensor may be disposed on the magnetic yoke 50 and corresponding to the lower end of the driving voice coil 12, so as to monitor the motion positions of the voice coil assembly 10 and the bobbin voice coil 11 in real time; sensors may also be disposed on the frame 40, the side magnetic conductive plate 72, or the central magnetic conductive plate 62 to monitor the moving position of the diaphragm 20 in real time, so as to detect the moving position of the frame voice coil 11.
In another embodiment of the detection unit, the detection unit comprises a detection circuit for detecting a voltage parameter or a current parameter of the driving voice coil 12 to detect a movement position of the bobbin voice coil 11. Thus, the movement position of the voice coil assembly 10 can be reflected (i.e., calculated) in real time by providing a detection circuit to detect the change in voltage or current driving the voice coil 12.
In an embodiment, the bobbin voice coil 11 and the driving voice coil 12 may be connected in parallel. Thus, the framework voice coil 11 and the driving voice coil 12 can be controlled respectively, so that the influence of the change of the power-on state of the framework voice coil 11 on the driving voice coil 12 is avoided.
In this case, in order to avoid the influence of the change in the energization state of the bobbin voice coil 11 on the driving voice coil 12, the following scheme may be adopted: loudspeaker 100 still includes the bypass circuit who connects in parallel in skeleton voice coil 11 and control switch, the last bypass switch that is equipped with of bypass circuit, bypass switch has and moves extremely in skeleton voice coil 11 to the direction that is close to magnetic gap 30 disconnection state during the first position, and the on-state when skeleton voice coil 11 moves to the second position to the direction of keeping away from magnetic gap 30. Specifically, when the bobbin voice coil 11 moves in a direction close to the magnetic gap 30 and moves to the first position, the control unit controls the control switch to the on state and controls the bypass switch to the off state, so that the bobbin voice coil 11 is powered on and the influence on the operation of the voice coil assembly 10 is avoided; when the bobbin voice coil 11 moves in a direction away from the magnetic gap 30 and moves to the second position, the control unit controls the control switch to the off state and controls the bypass switch to the on state, so that the bobbin voice coil 11 is powered off and the work of the voice coil assembly 10 is prevented from being affected.
Of course, when the driving voice coil 12 includes a plurality of sub-voice coils, the connection manner of the bobbin voice coil 11 and the driving voice coil 12 may be further designed according to the connection manner of the plurality of sub-voice coils, which will be illustrated below.
In the present embodiment, as shown in fig. 1 and 2, the driving voice coil 12 includes a plurality of (i.e., greater than or equal to two) sub-voice coils connected in series. Specifically, each of the plurality of sub voice coils has a first end and a second end in the same direction, and for two adjacent sub voice coils, the first end of one sub voice coil is connected with the second end of the other sub voice coil. Of course, the driving voice coil 12 may be provided as one integrated voice coil.
In particular embodiments, the plurality of sub-voice coils may be arranged in series with each other or in parallel with each other, which may each improve the acoustic performance of the speaker 100; the following description is made separately.
In some embodiments, the plurality of sub-voice coils are connected in series. In this way, during the operation of the voice coil assembly 10, the position of the voice coil assembly 10 in the magnetic gap 30 can be modeled according to the electromotive force difference at the serial connection of the two adjacent sub-voice coils, so that the movement position of the voice coil assembly 10 can be calculated in real time, and the vibration system of the loudspeaker 100 can be optimized in real time to improve the acoustic performance of the loudspeaker 100.
Specifically, when a plurality of sub-voice coils are connected in series in sequence, the positions of the two adjacent sub-voice coils in the magnetic field of the magnetic gap 30 are different, so that the magnetic induction intensity passing through the two adjacent sub-voice coils is also different, and the induced electromotive forces generated by the two adjacent sub-voice coils are also different, and by detecting the voltage difference at the connection point of the two adjacent sub-voice coils, the relative positions of the two adjacent sub-voice coils in the magnetic field can be calculated in real time, that is, the vibration position of the voice coil assembly 10 in the magnetic field can be detected.
If voice coil assembly 10 is skew preset position in the vibration process, then the position of two adjacent sub voice coils all can change, the induced electromotive force that two adjacent sub voice coils produced this moment can change, the voltage difference of two adjacent sub voice coil junctions changes promptly, can calculate out voice coil assembly 10's whole skew through detecting the change of voltage difference, thereby accessible external input offset current's mode makes voice coil assembly 10 get back to preset position again, thereby can realize the correction to voice coil assembly 10 position, with the vibration stability and the symmetry of improvement voice coil assembly 10 in the magnetic field, thereby effectively improve speaker 100's whole acoustic performance.
Therefore, when the detection circuit is used to detect the movement position of the bobbin voice coil 11, the following steps are performed: at least two of the sub voice coils are connected in series, and the detection circuit is used for detecting the potential difference at the position where the two sub voice coils are connected in series so as to calculate the relative positions of the two adjacent sub voice coils in the magnetic field in real time, namely, the vibration positions of the voice coil assembly 10 and the framework voice coil 11 in the magnetic field can be detected.
In some embodiments, the plurality of sub-voice coils are connected in parallel with each other. Therefore, on the premise of the same resistance value, the voice coil can be thinner, the magnetic gap 30 can be narrower, and the BL value is higher, so that the sensitivity of the vibration system is improved, and the acoustic performance of the loudspeaker 100 is improved. In this embodiment, in addition to the bobbin voice coil 11 and the plurality of sub-voice coils being connected in parallel or in series, the bobbin voice coil 11 may be connected in series with any one of the sub-voice coils, and in this case, a bypass circuit needs to be provided outside the bobbin voice coil 11 and the control switch.
Further, skeleton voice coil 11 adopts autohension enameled wire coiling to form, drive voice coil 12 adopts autohension enameled wire coiling to form, skeleton voice coil 11 is connected through the autohension lacquer of autohension enameled wire with drive voice coil 12. The self-adhesive enameled wire is a special enameled wire, and has viscosity after being heated, and the viscosity is good. Specifically, when the voice coil assembly 10 is wound, the bobbin voice coil 11 and the driving voice coil 12 are wound and formed in close proximity and connected together through the self-adhesive varnish of the self-adhesive enameled wire.
Alternatively, hot air may be used to blow the self-adhesive enamel wire to make it adhesive when winding the voice coil assembly 10, so that the adjacent wound enamel wires are bonded together when winding.
Therefore, the framework voice coil 11 and the driving voice coil 12 are connected through the self-adhesive paint of the self-adhesive enameled wire, the bonding force between the framework voice coil 11 and the driving voice coil 12 is high, and therefore the connection strength of the framework voice coil 11 and the driving voice coil 12 can be improved; in addition, the temperature resistance can be improved. In addition, it is also possible to avoid coating an adhesive layer between the bobbin voice coil 11 and the driving voice coil 12, and thus it is possible to avoid the influence of the adhesive layer on the sensitivity of the speaker 100, i.e., it is advantageous to improve the sensitivity of the speaker 100.
In this embodiment, drive voice coil 12 is including a plurality of (be more than or equal to two) sub voice coils that connect gradually, and a plurality of sub voice coils all adopt the autohension enameled wire coiling to form, and skeleton voice coil 11 is connected through the autohension lacquer of autohension enameled wire with one of them sub voice coil, and two adjacent sub voice coils are connected through the autohension lacquer of autohension enameled wire to guarantee/improve the joint strength of two adjacent sub voice coils, improve temperature resistance, and be favorable to improving speaker 100's sensitivity.
Further, the bobbin voice coil 11 and the driving voice coil 12 are wound on the same winding tool. Specifically, the frame voice coil 11 and the driving voice coil 12 are sequentially and closely wound on the same winding tool. So, through forming skeleton voice coil 11 and the coiling of drive voice coil 12 on same wire winding frock, not only can improve the concentricity of skeleton voice coil 11 and drive voice coil 12, can also make skeleton voice coil 11 and the combination department wire winding of drive voice coil 12 arrange closely to can improve speaker 100's acoustic performance.
In this embodiment, the driving voice coil 12 includes a plurality of (i.e., greater than or equal to two) sub voice coils connected in sequence, and the bobbin voice coil 11 and the plurality of sub voice coils are wound on the same winding tool. Specifically, the bobbin voice coil 11 and the plurality of sub voice coils are sequentially and closely wound on the same winding tool. In this manner, the concentricity and the high degree of uniformity of the coils of the voice coil assembly 10 can be improved, and the acoustic performance of the speaker 100 can be improved.
It is understood that when winding the coil (i.e., the bobbin voice coil 11, or each sub-voice coil), the innermost winding is wound first, and the innermost winding has an incoming end; after the winding is finished, the outermost winding is provided with an outlet end.
In this embodiment, as shown in fig. 1 and 2, optionally, the number of the sub-voice coils is two, and the two sub-voice coils are respectively a first sub-voice coil 121 and a second sub-voice coil 122, the first sub-voice coil 121 is connected to the bobbin voice coil 11, the incoming line end and the outgoing line end of the first sub-voice coil 121 are both disposed at the first end of the first sub-voice coil, the incoming line end and the outgoing line end of the second sub-voice coil 122 are both disposed at the first end of the second sub-voice coil, and the first end of the first sub-voice coil 121 is connected to the second end of the second sub-voice coil 122, or the second end of the first sub-voice coil 121 is connected to the first end of the.
Further, the wire of the bobbin voice coil 11 has a conductivity smaller than that of the wire driving the voice coil 12. This facilitates improvement of the BL value and also facilitates reduction of the weight of the bobbin voice coil 11 to achieve reduction of the overall weight of the voice coil assembly 10.
Specifically, the wire of the bobbin voice coil 11 is a copper-clad aluminum enameled wire or an aluminum enameled wire. Wherein, the mass percentage of copper in the wire of the framework voice coil 11 is greater than or equal to 0 and less than or equal to 15%. Optionally, the wire of the frame voice coil 11 is a 15% copper-clad aluminum wire, a 12% copper-clad aluminum wire, a 10% copper-clad aluminum wire, an 8% copper-clad aluminum wire, a 5% copper-clad aluminum wire, or a pure aluminum wire.
Therefore, the structural strength of the framework voice coil 11 can be ensured, and the framework voice coil 11 has stronger heat dissipation capacity; the framework voice coil 11 can be ensured to have certain conductivity so as to generate effective driving force when the framework voice coil 11 is electrified, and the power consumption is reduced; it may also be convenient to reduce the weight of the bobbin voice coil 11, and thus may be convenient to reduce the overall weight of the voice coil assembly 10, to reduce the burden on the voice coil assembly 10 when vibrating, and thus may be convenient to improve/ensure the sensitivity of the loudspeaker 100.
Further, as shown in fig. 1 to 4, the radial thickness of the bobbin voice coil 11 is smaller than the radial thickness of the driving voice coil 12. Thus, the weight of the bobbin voice coil 11 can be reduced easily. Specifically, the inner annular surface of the framework voice coil 11 is arranged close to the inner annular surface of the driving voice coil 12; optionally, the inner annular surface of the bobbin voice coil 11 is aligned with the inner annular surface of the driver voice coil 12.
Optionally, the axial length of the bobbin voice coil 11 is smaller than the axial length of the driving voice coil 12. Thus, the weight of the bobbin voice coil 11 can be reduced easily.
It should be noted that, in an embodiment, at least one of the above manners may be adopted to reduce the weight of the bobbin voice coil 11, so as to improve the sensitivity of the speaker 100.
Specifically, as shown in fig. 1, the diaphragm 20 includes a diaphragm body 21 and a Dome22 (i.e., a Dome).
Further, as shown in fig. 1, the speaker 100 includes a damper 90 elastically supporting the vibration system.
The invention also provides electronic equipment which comprises a shell and the loudspeaker, wherein the loudspeaker is arranged on the shell. The specific structure of the speaker refers to the above embodiments, and since the electronic device of the present invention adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
Wherein the speaker is disposed within the housing. Specifically, the casing is provided with a sound hole corresponding to the vibration diaphragm.
The electronic device includes, but is not limited to, MP3, MP4, MP5, mobile phone, tablet computer, or hearing aid.
The above description is only a preferred embodiment of the present invention, and is 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 (13)
1. A loudspeaker, comprising:
a magnetic circuit system having a magnetic gap;
the vibration system comprises a vibrating diaphragm and a voice coil assembly arranged corresponding to the magnetic gap, the voice coil assembly comprises a framework voice coil and a driving voice coil, one end of the framework voice coil is connected to the vibrating diaphragm, the driving voice coil is connected to the other end of the framework voice coil, the driving voice coil is used for being connected with an external circuit, and the driving voice coil is electrified when the loudspeaker works; and
the control unit is used for controlling the framework voice coil to be electrified when the framework voice coil moves to a first position in a direction close to the magnetic gap; the control unit is also used for controlling the framework voice coil to be powered off when the framework voice coil moves to a second position in the direction far away from the magnetic gap;
the radial thickness of the framework voice coil is smaller than that of the driving voice coil; and/or the axial length of the framework voice coil is smaller than that of the driving voice coil.
2. The loudspeaker of claim 1, wherein the control unit includes a control switch in series with the armature voice coil, the control switch having an on state when the armature voice coil moves to a first position in a direction toward the magnetic gap and an off state when the armature voice coil moves to a second position in a direction away from the magnetic gap.
3. The loudspeaker of claim 2, wherein the first position is the same position as the second position.
4. The speaker of claim 2, wherein the control unit further comprises a detection unit for detecting a movement position of the bobbin voice coil.
5. The speaker of claim 4, wherein the detection unit includes a position sensor for fixed-point detection or real-time detection of a movement position of the bobbin voice coil; alternatively, the first and second electrodes may be,
the detection unit comprises a detection circuit, and the detection circuit is used for detecting a voltage parameter or a current parameter of the driving voice coil so as to detect the motion position of the framework voice coil.
6. The loudspeaker according to any one of claims 1 to 5 wherein the bobbin voice coil is connected in parallel with the drive voice coil.
7. The loudspeaker according to any one of claims 2 to 5 wherein said bobbin voice coil is connected in series with said drive voice coil;
the loudspeaker is characterized in that the loudspeaker further comprises a bypass circuit connected in parallel with the framework voice coil and the control switch, a bypass switch is arranged on the bypass circuit, the bypass switch is provided with a disconnection state when the framework voice coil moves to the first position in the direction close to the magnetic gap and a connection state when the framework voice coil moves to the second position in the direction far away from the magnetic gap.
8. The speaker of claim 7, wherein the driving voice coil comprises a plurality of sub voice coils connected in series.
9. The speaker of claim 8, wherein at least two of said sub-voice coils are connected in series, and the detection unit of said control unit includes a detection circuit for detecting a potential difference at the point where two of said sub-voice coils are connected in series.
10. The loudspeaker according to any one of claims 1 to 5, wherein the wire of the bobbin voice coil has a conductivity less than that of the wire of the driving voice coil.
11. The loudspeaker according to any one of claims 1 to 5, wherein the bobbin voice coil is formed by winding self-adhesive enameled wires, the driving voice coil is formed by winding self-adhesive enameled wires, and the bobbin voice coil and the driving voice coil are connected through the self-adhesive enamel of the self-adhesive enameled wires.
12. The loudspeaker of claim 11, wherein the wire of the bobbin voice coil is a copper-clad aluminum enameled wire or an aluminum enameled wire.
13. An electronic device comprising a housing and a loudspeaker according to any one of claims 1 to 12, said loudspeaker being provided in said housing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911178049.5A CN110856087B (en) | 2019-11-25 | 2019-11-25 | Speaker and electronic apparatus |
| PCT/CN2020/128907 WO2021104066A1 (en) | 2019-11-25 | 2020-11-16 | Loudspeaker and electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911178049.5A CN110856087B (en) | 2019-11-25 | 2019-11-25 | Speaker and electronic apparatus |
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| CN110856087A CN110856087A (en) | 2020-02-28 |
| CN110856087B true CN110856087B (en) | 2021-07-13 |
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| CN201911178049.5A Active CN110856087B (en) | 2019-11-25 | 2019-11-25 | Speaker and electronic apparatus |
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| CN110856087B (en) * | 2019-11-25 | 2021-07-13 | 歌尔股份有限公司 | Speaker and electronic apparatus |
| CN111225322B (en) * | 2019-11-25 | 2021-10-08 | 歌尔股份有限公司 | Speaker and electronic apparatus |
| CN111818426A (en) * | 2020-07-22 | 2020-10-23 | 精拓丽音科技（北京）有限公司 | Skeleton voice coil and electroacoustic conversion device |
| CN113676806B (en) * | 2021-08-05 | 2024-04-19 | 维沃移动通信有限公司 | Earphone and electronic equipment assembly |
| CN114257927A (en) * | 2021-12-24 | 2022-03-29 | 深圳声宏电子有限公司 | Voice coil winding method |
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| WO2021104066A1 (en) | 2021-06-03 |
| CN110856087A (en) | 2020-02-28 |
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