WO2022252666A1 - Noyau interne, module de haut-parleur et dispositif électronique - Google Patents

Noyau interne, module de haut-parleur et dispositif électronique Download PDF

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Publication number
WO2022252666A1
WO2022252666A1 PCT/CN2022/074839 CN2022074839W WO2022252666A1 WO 2022252666 A1 WO2022252666 A1 WO 2022252666A1 CN 2022074839 W CN2022074839 W CN 2022074839W WO 2022252666 A1 WO2022252666 A1 WO 2022252666A1
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WO
WIPO (PCT)
Prior art keywords
voice coil
support frame
diaphragm group
magnet
pole
Prior art date
Application number
PCT/CN2022/074839
Other languages
English (en)
Chinese (zh)
Inventor
李运海
伍迪
王良
张�成
Original Assignee
北京荣耀终端有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Application filed by 北京荣耀终端有限公司 filed Critical 北京荣耀终端有限公司
Publication of WO2022252666A1 publication Critical patent/WO2022252666A1/fr

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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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/15—Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops

Definitions

  • the present application relates to the technical field of electronic equipment, in particular to a core, a loudspeaker module and electronic equipment.
  • Embodiments of the present application provide a core, a loudspeaker module and an electronic device, which can improve low-frequency loudness and reduce noise at the same time.
  • some embodiments of the present application provide an inner core, which includes a first diaphragm group, a second diaphragm group, a first voice coil, a second voice coil and a magnetic circuit system.
  • the first diaphragm group, the second diaphragm group, the first voice coil, and the second voice coil are set on the same center line, and the first voice coil, the second voice coil and the magnetic circuit system are located between the first diaphragm group and the second diaphragm Between the groups, the first voice coil is fixed on the first diaphragm group, and the second voice coil is fixed on the second diaphragm group.
  • the magnetic circuit system includes a first center magnet, a second center magnet and side magnets.
  • the first center magnet and the second center magnet are arranged along the extension direction of the center line, the direction from the S pole to the N pole of the first center magnet is parallel to the extension direction of the center line, and the direction from the S pole to the N pole of the second center magnet is parallel to the extension direction of the center line.
  • the direction from the S pole to the N pole of the first central magnet is consistent.
  • the side magnets are arranged around the circumference of the first center magnet and the second center magnet, and the direction from the S pole to the N pole of the side magnet is opposite to the direction from the S pole to the N pole of the first center magnet.
  • a first magnetic gap is formed between the first center magnet and the side magnets, and the part of the first voice coil that is far away from the first diaphragm group extends into the first magnetic gap.
  • a second magnetic gap is formed between the first central magnet and the side magnets, and the part of the second voice coil that is far away from the second diaphragm group extends into the second magnetic gap.
  • the magnetic current direction at the first voice coil is opposite to that at the second voice coil, and when the first voice coil and the second voice coil input current, it can drive
  • the vibration directions of the first voice coil and the second voice coil are opposite at the same time, thereby respectively providing driving forces in opposite directions for the first diaphragm group and the second diaphragm group, so that the first diaphragm group and the second diaphragm group
  • the membrane stack emits sound in two opposite directions simultaneously. In this way, at least part of the opposing forces can be canceled out to reduce the vibration to a certain extent, thereby reducing the impact on the vibration of the keyboard and avoiding noise.
  • the core further includes a supporting component.
  • the support assembly includes a support plate, a first support frame and a second support frame.
  • the support plate is located between the first center magnet and the second center magnet, and both the first center magnet and the second center magnet are fixed on the support plate.
  • the first support frame is located between the first diaphragm group and the support plate, and the first diaphragm group is supported on the first support frame.
  • the second support frame is located between the second diaphragm group and the support plate, and the second diaphragm group is supported on the second support frame.
  • the first support frame, the support plate and the second support frame are relatively fixed, and the side magnets are fixed on the first support frame and/or the second support frame.
  • the support assembly provided by the embodiment of the present application can fix the relative positions between the components in the magnetic circuit system, and between the components in the magnetic circuit system and the first diaphragm group and the second diaphragm group, and the support assembly is
  • the sandwich structure composed of the support plate, the first support frame and the second support frame is beneficial to reduce the processing difficulty of the support component and at the same time reduce the difficulty of assembling the support component in the inner core.
  • an extension is provided on the edge of the support plate, and the extension is located between the first magnetic gap and the second magnetic gap, and the first voice coil and the second voice coil are along the central line
  • the projections of the extension direction on the extension part are located in the extension part. In this way, the extension part can reduce the influence of airflow turbulence on the first voice coil and the second voice coil to a certain extent.
  • the outer edge of the extension part is attached to the inner surface of the side magnet.
  • the extension separates the first magnetic gap from the second magnetic gap.
  • the first magnetic gap and the second magnetic gap do not generate air flow, so there is no air flow turbulence, thereby reducing the influence of air flow on the first voice coil and the second voice coil as much as possible.
  • the thickness of the extension part is smaller than the thickness of the support plate. In this way, it is beneficial to increase the vibration stroke of the first voice coil in the first magnetic gap and/or increase the vibration stroke of the second voice coil in the second magnetic gap, thereby increasing the first diaphragm group and/or the second vibration stroke.
  • the amplitude of the two-diaphragm group improves the low-frequency loudness of the speaker module.
  • the first support frame is fixedly connected to the second support frame, and the edge of the support plate is provided with a fixing part, and the fixing part is clamped between the first support frame and the second support frame. between.
  • the fixing part is provided with a first limiting structure
  • the first supporting frame and/or the second supporting frame is provided with a second limiting structure
  • the first limiting structure cooperates with the second limiting structure to prevent the fixing part from supporting Move in the plane of the board.
  • the first support frame and the second support frame are fixed, and the support plate is limited in its own thickness direction by the first support frame and the second support frame, and the first limit structure and the second limit structure are adopted at the same time
  • the support plate is limited in its own plane, so that the relative position between the support plate and the first support frame and the second support frame can be fixed, so that the first support frame, the second support frame, and the support plate are three
  • the latter are fixed together without complex fixing operations, so the assembly efficiency is high.
  • the first limiting structure may be a limiting post, a limiting hole, a limiting groove, a limiting notch, a limiting protrusion, and the like.
  • the second limiting structure may be a limiting hole, a limiting post, a limiting protrusion, a limiting post, a limiting groove, etc., which are not specifically limited here.
  • the first limiting structure is a limiting notch arranged on an edge of the fixing part away from the support plate.
  • the second limiting structure includes a first limiting column and a second limiting column.
  • the first limiting column is arranged on the surface of the first support frame facing the second support frame.
  • the second limiting column is arranged on the surface of the second support frame facing the first support frame.
  • the first limiting column and the second limiting column are matched and accommodated in the limiting notch.
  • the material of the support plate may be a magnetically permeable material or a non-magnetically permeable material.
  • the material of the support plate is stainless steel.
  • the magnetic circuit system further includes a first central magnetic yoke, a second central magnetic yoke, a first edge magnetic yoke, and a second edge magnetic yoke.
  • the first central magnetic yoke is arranged on the surface of the first central magnet away from the second central magnet
  • the second central magnetic yoke is arranged on the surface of the second central magnet far away from the first central magnet.
  • the end faces of the two ends of the side magnet in the extension direction of the center line are respectively the first end face and the second end face
  • the first edge magnetic yoke is arranged on the first end face of the side magnet
  • the second edge magnetic yoke is arranged on the second end face of the side magnet. Two ends.
  • the magnetic current intensity can be increased, and the influence on the first diaphragm group and the second diaphragm group can be improved.
  • the drive strength of the diaphragm stack by constraining the magnetic field lines through the first central magnetic yoke, the second central magnetic yoke, the first edge magnetic yoke and the second edge magnetic yoke, the magnetic current intensity can be increased, and the influence on the first diaphragm group and the second diaphragm group can be improved.
  • the first diaphragm group includes a first diaphragm sheet and a first dome.
  • the first diaphragm includes a first ring and a first flat membrane surrounded by the first ring.
  • the first dome is stacked on the side of the first flat film away from the first voice coil, and is fixed together with the first flat film by means of gluing or the like.
  • the first voice coil is fixed on the first flat film by means of glue or the like.
  • the second diaphragm group includes a second diaphragm sheet and a second dome.
  • the second diaphragm includes a second ring and a second flat membrane surrounded by the second ring.
  • the second dome is stacked on the side of the second flat film away from the second voice coil, and is fixed with the second flat film by means of gluing or the like.
  • the second voice coil is fixed on the second flat film by means of glue or the like.
  • some embodiments of the present application provide a speaker module.
  • the speaker module includes a casing and the core described in any of the above technical solutions.
  • the core is arranged in the casing, and the casing is
  • the diaphragm group and the second diaphragm group are divided into the first front cavity, the rear cavity and the second front cavity.
  • the first voice coil, the second voice coil, the magnetic circuit system and the support assembly of the core are located in the rear cavity.
  • the speaker module provided by the present application includes the core described in any one of the above technical solutions, the two can solve the same technical problem and achieve the same effect.
  • both the first front cavity and the second front cavity communicate with the sound output channel.
  • the number of sound output channels is two, the first front cavity communicates with one sound output channel, and the second front cavity communicates with the other sound output channel.
  • some embodiments of the present application provide an electronic device, the electronic device includes a casing, a middle board, a keyboard, and the speaker module described in the above technical solution, the middle board is arranged in the casing, and the keyboard and the speaker module are fixed on the middle plate.
  • the vibration generated by the speaker module is relatively small, when the vibration generated by the speaker module is transmitted to the keyboard through the middle plate, it is less likely to cause the keys on the keyboard to resonate, and the noise generated is less, which can ensure that the speaker module audio playback quality.
  • FIG. 1 is a schematic structural diagram of an electronic device provided by some embodiments of the present application.
  • Fig. 2 is a perspective view of the keyboard host in the electronic device shown in Fig. 1;
  • Fig. 3 is an exploded view of the keyboard host shown in Fig. 2;
  • Fig. 4 is a schematic cross-sectional structure diagram of the keyboard host shown in Fig. 2 at the line A-A;
  • Fig. 5 is a perspective view of a speaker module in the keyboard host shown in Fig. 3;
  • Fig. 6 is a structural schematic view of the loudspeaker module shown in Fig. 5 viewed from bottom to top;
  • Fig. 7 is a three-dimensional sectional view of the loudspeaker module shown in Fig. 6 at the B-B line;
  • Fig. 8 is a schematic cross-sectional structure diagram of the core in the loudspeaker module shown in Fig. 7;
  • FIG. 9 is a schematic structural diagram of a kernel provided by some other embodiments of the present application.
  • Figure 10 is an exploded view of the kernel shown in Figure 9;
  • Fig. 11 is a schematic diagram of the cross-sectional structure of the inner core shown in Fig. 9 at the line C-C;
  • Fig. 12 is an exploded view of the inner magnetic circuit system shown in Fig. 10;
  • Figure 13 is a perspective view of the inner support assembly shown in Figure 10;
  • Figure 14 is an exploded view of the support assembly shown in Figure 13;
  • Fig. 15 is a schematic cross-sectional structure diagram of a speaker module provided by some embodiments of the present application.
  • first”, “second”, “third”, and “fourth” are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly indicating the indicated The number of technical characteristics. Thus, a feature defined as “first”, “second”, “third” and “fourth” may expressly or implicitly include one or more of such features.
  • the term “comprising”, “comprising” or any other variant thereof is intended to cover a non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements, but also includes Including other elements not expressly listed, or also including elements inherent in such process, method, article or apparatus.
  • an element defined by the phrase “comprising a " does not preclude the presence of additional identical elements in the process, method, article, or apparatus comprising that element.
  • the present application provides an electronic device, which is a type of electronic device with a speaker module.
  • the electronic equipment includes, but is not limited to, mobile phones, tablet personal computers, laptop computers, personal digital assistants (PDAs), personal computers, notebook computers (notebooks), vehicle-mounted Electronics such as devices and wearables.
  • PDAs personal digital assistants
  • notebooks notebook computers
  • vehicle-mounted Electronics such as devices and wearables.
  • FIG. 1 is a schematic structural diagram of an electronic device 100 provided by some embodiments of the present application.
  • the electronic device 100 is a notebook computer.
  • the electronic device 100 includes a display 10 and a keyboard host 20 .
  • the display 10 is used to display images, videos, and the like.
  • the keyboard host 20 is rotatably connected to the display 10 .
  • the keyboard host 20 is used to input instructions and data, and controls the display 10 to display images and videos according to the input instructions and data. Meanwhile, the keyboard host 20 is also used to play voice or music.
  • the electronic device 100 is switchable between an open state and a closed state.
  • the display 10 and the keyboard host 20 form an angle greater than 0° and less than 180°.
  • the display 10 covers the keyboard main body 20 , and the display surface of the display 10 is opposite to the keyboard surface of the keyboard main body 20 .
  • an XYZ coordinate system is established for the keyboard host 20 .
  • the extension direction of the rotation axes of the keyboard main body 20 and the display 10 as the X-axis direction
  • the thickness direction of the keyboard main body 20 as the Z-axis direction
  • the direction perpendicular to both the X-axis direction and the Z-axis direction as the Y-axis direction.
  • FIG. 2 is a perspective view of the main keyboard 20 in the electronic device 100 shown in FIG. 1
  • FIG. 3 is an exploded view of the main keyboard 20 shown in FIG. 2
  • the keyboard host 20 includes a casing 21 , a middle board 22 , a keyboard 23 and a speaker module 24 .
  • FIG. 2 and FIG. 3 only schematically show some components included in the keyboard main unit 20, and the actual shape, actual size, actual position and actual structure of these components are not affected by FIG. 2 and FIG. Figure limited.
  • the shell 21 is used to protect the internal structure of the keyboard host 20 .
  • the shell 21 can be a structural whole, or can be formed by assembling a plurality of parts.
  • the shell 21 includes a C shell 211 and a D shell 212 .
  • the C shell 211 is combined with the D shell 212 to enclose the inner accommodation space of the shell 21 .
  • the C shell 211 and the D shell 212 can be fixed by clamping, can also be fixed by glue, and can also be fixed by screw connection, which is not specifically limited here.
  • the middle board 22 is located in the inner accommodation space of the casing 21 .
  • the middle plate 22 is fixed on the inner surface of the C shell 211 by means of gluing, clamping, screwing, riveting and the like. In other embodiments, the middle board 22 may also be fixed on the inner surface of the D shell 212 .
  • the material of the middle board 22 includes but not limited to plastic and metal.
  • the middle plate 22 is used as a supporting “skeleton” for the electronic components in the keyboard host 20 .
  • the keyboard 23 and the speaker module 24 are directly or indirectly fixed on the middle board 22 .
  • the keyboard 23 is used to input instructions and data.
  • the keyboard 23 includes a fixed board 231 and a plurality of keys 232 connected to the fixed board 231 .
  • FIG. 4 is a schematic cross-sectional structure diagram of the keyboard host 20 shown in FIG. 2 at line A-A.
  • the fixing plate 231 is fixed on the middle plate 22 .
  • the middle plate 22 is provided with a first escape opening 22a (please refer to FIG. 3 ).
  • the position corresponding to each button 232 on the C shell 211 is provided with a second avoidance opening 21a (please refer to FIG. 3 ).
  • the button 232 protrudes out of the C-shell 211 through the first avoidance opening 22a and the second escape opening 21a corresponding to the button 232 .
  • the speaker module 24 is used to convert audio electrical signals into sound signals.
  • the number of speaker modules 24 may be two, and the two speaker modules 24 are arranged at both ends of the keyboard host 20 in the direction of the X-axis.
  • the two speaker modules 24 have the same structure and are arranged symmetrically.
  • the number of speaker modules 24 may also be one or more than three, which is not specifically limited here. It should be noted that the position of the speaker module 24 in the keyboard main unit 20 can be flexibly set, and FIG. 3 only provides an example of a position of the speaker module 24 in the keyboard main unit 20, which cannot be regarded as constituting a limitation for this application. special restrictions.
  • FIG. 5 is a perspective view of a speaker module 24 in the keyboard main unit 20 shown in FIG. 3, and FIG. 6 is a structural schematic view of the speaker module 24 shown in FIG.
  • the speaker module 24 includes a casing 241 and a core 242 .
  • FIG. 7 is a three-dimensional cross-sectional view of the speaker module 24 shown in FIG. 6 at the line B-B.
  • the casing 241 encloses the rear cavity C2 of the speaker module 24 .
  • the housing 241 can be a structural whole, or can be formed by assembling a plurality of parts.
  • the housing 241 is formed by combining a front shell 241a and a rear shell 241b.
  • a mounting hole 243 is defined on a wall of the housing 241 .
  • the installation hole 243 is disposed on the front shell 241a.
  • the inner core 242 is installed in the rear cavity C2, and the inner core 242 is blocked at one end opening of the installation hole 243 which communicates with the rear cavity C2.
  • the outer surface of the front shell 241a is attached to the inner surface of the D shell 212 in the speaker module 20 shown in FIG. 3 .
  • the inner wall of the installation hole 243 , the inner core 242 and the D shell 212 enclose the front cavity C1 of the speaker module 24 .
  • the D shell 212 is provided with a sound outlet 21 b communicating the front chamber C1 with the outer space of the D shell 212 .
  • FIG. 8 is a schematic cross-sectional structure diagram of the core 242 in the speaker module 24 shown in FIG. 7 .
  • the core 242 includes a diaphragm 242a, a voice coil 242b fixedly connected to the diaphragm 242a, a magnetic circuit system 242c disposed on one side of the diaphragm 242a, and a frame 242d for installing the diaphragm 242a and the magnetic circuit system 242c.
  • the inner core 242 is fixed on the inner wall of the front shell 241a through the frame 242d, and the diaphragm 242a is blocked in the opening of one end of the installation hole 243 that communicates with the rear cavity C2.
  • the voice coil 242b, the magnetic circuit system 242c and the frame 242d are located in the rear cavity C2, and the diaphragm 242a, the inner wall of the mounting hole 243 and the D shell 212 in FIG. 3 enclose the front cavity C1 of the speaker module 24.
  • the voice coil 242b generates an induced magnetic field after being energized, and is displaced by the magnetic force of the magnetic circuit system 242c to drive the diaphragm 242a to vibrate, thereby pushing the air in the front cavity C1 to vibrate to form sound waves, which are output from the sound outlet 21b .
  • the magnetic circuit system 242c and the frame 242d are subjected to reverse force, which causes vibration.
  • the vibration is transmitted to the keyboard 23 through the housing 241 in FIG. 7 and the middle plate 22 in FIG. 3 successively. Therefore, it is easy to cause the key 232 on the keyboard 23 to resonate.
  • the button 232 resonates, the button 232 collides with structures such as the C shell 211 and the fixing plate 231 , thereby generating noise, which affects the sound playing effect of the speaker module 24 .
  • FIG. 9 is a schematic structural diagram of the core 242 provided by some other embodiments of the present application
  • FIG. 10 is an exploded view of the core 242 shown in FIG. 9
  • the inner core 242 includes a first diaphragm group 2421 , a second diaphragm group 2422 , a first voice coil 2423 , a second voice coil 2424 , a magnetic circuit system 2425 and a supporting component 2426 .
  • FIG. 9 and FIG. 10 only schematically show some components included in the core 242, and the actual shape, actual size, actual position and actual structure of these components are not affected by FIG. 9 and FIG. 10 and the following drawings. limited.
  • the first diaphragm group 2421 , the second diaphragm group 2422 , the first voice coil 2423 and the second voice coil 2424 are arranged concentrically with the central line O.
  • the first voice coil 2423 , the second voice coil 2424 , the magnetic circuit system 2425 and the supporting component 2426 are located between the first diaphragm group 2421 and the second diaphragm group 2422 .
  • FIG. 11 is a schematic cross-sectional structure diagram of the inner core shown in FIG. 9 at line C-C.
  • the first diaphragm group 2421 includes a first diaphragm sheet 2421a and a first dome 2421b.
  • the first diaphragm 2421a includes a first ring 2421a1 and a first flat membrane 2421a2 surrounded by the first ring 2421a1.
  • the first dome 2421b is stacked on the side of the first flat film 2421a2 away from the first voice coil 2423, and is fixed with the first flat film 2421a2 by means of gluing or the like.
  • the first voice coil 2423 is fixed on the first flat film 2421a2 by means of glue or the like.
  • the second diaphragm group 2422 includes a second diaphragm sheet 2422a and a second dome 2422b.
  • the second diaphragm 2422a includes a second ring 2422a1 and a second flat membrane 2422a2 surrounded by the second ring 2422a1.
  • the second dome 2422b is laminated on the side of the second flat film 2422a2 away from the second voice coil 2424, and is fixed with the second flat film 2422a2 by means of glue or the like.
  • the second voice coil 2424 is fixed on the second flat film 2422a2 by means of glue or the like.
  • the magnetic circuit system 2425 is used to generate a magnetic field. Under the action of the magnetic field, the vibration directions of the first voice coil 2423 and the second voice coil 2424 can be opposite at the same time, thus the first diaphragm group 2421 and the second diaphragm group 2421 and the second The diaphragm group 2422 provides driving force in opposite directions, so that the first diaphragm group 2421 and the second diaphragm group 2422 emit sound in two opposite directions at the same time.
  • FIG. 12 is an exploded view of the magnetic circuit system 2425 inside the inner core 242 shown in FIG. 10 .
  • the magnetic circuit system 2425 includes a first center magnet 2425a, a second center magnet 2425b, and a side magnet 2425c.
  • the first central magnet 2425a and the second central magnet 2425b are arranged along the extension direction of the central line O.
  • the direction from the S pole to the N pole of the first central magnet 2425a is parallel to the extending direction of the central line O.
  • the direction from the S pole to the N pole of the second center magnet 2425b is consistent with the direction from the S pole to the N pole of the first center magnet 2425a.
  • the side magnets 2425c are arranged around the circumference of the first center magnet 2425a and the second center magnet 2425b.
  • the number of side magnets 2425c can be one or more.
  • the multiple side magnets 2425c are uniformly arranged around the circumference of the first center magnet 2425a and the second center magnet 2425b. In the embodiment shown in FIG. 12, the number of side magnets 2425c is four.
  • the direction from the S pole to the N pole of the side magnet 2425c is opposite to that of the first center magnet 2425a from the S pole to the N pole. In this way, the first central magnet 2425a, the second central magnet 2425b and the side magnets 2425c form a magnetic current circuit as shown in FIG. 11 .
  • a first magnetic gap K1 is formed between the first center magnet 2425a and the side magnet 2425c.
  • the part of the first voice coil 2423 away from the first diaphragm group 2421 extends into the first magnetic gap K1.
  • a second magnetic gap K2 is formed between the first center magnet 2425a and the side magnet 2425c. A part of the second voice coil 2424 away from the second diaphragm group 2422 extends into the second magnetic gap K2.
  • the magnetic current direction at the first voice coil 2423 is opposite to that at the second voice coil 2424, when the first voice coil 2423 and the second voice coil 2424 input current, the first voice coil 2423 can be driven
  • the voice coil 2423 and the second voice coil 2424 vibrate in opposite directions at the same time, thereby providing driving forces in opposite directions to the first diaphragm group 2421 and the second diaphragm group 2422 respectively, so that the first diaphragm group 2421 and the second diaphragm group 2422
  • the second diaphragm group 2422 emits sound in two opposite directions at the same time. In this way, at least part of the opposing forces can be canceled out to reduce the vibration to a certain extent, thereby reducing the impact on the vibration of the keyboard and avoiding noise.
  • the magnetic circuit system 2425 also includes a first central magnetically permeable yoke 2425d, a second central magnetically permeable yoke 2425e, the first edge magnetic yoke 2425f and the second edge magnetic yoke 2425g.
  • the first central magnetic yoke 2425d , the second central magnetic yoke 2425e , the first edge magnetic yoke 2425f and the second edge magnetic yoke 2425g are used to restrict the outward diffusion of the magnetic flux leakage of the induction coil. Its material can be a yoke made of stacked silicon steel sheets.
  • the first central magnetic yoke 2425d is arranged on the surface of the first central magnet 2425a away from the second central magnet 2425b by means of gluing, clamping, or threaded connection, and the second central magnetic yoke 2425e is connected by gluing, clamping, or screwing. They are arranged on the surface of the second center magnet 2425b away from the first center magnet 2425a in the same manner.
  • the end surfaces at both ends of the side magnet 2425c in the extending direction of the central line O are respectively a first end surface and a second end surface.
  • the first edge magnetic yoke 2425f is disposed on the first end surface of the edge magnet 2425c by means of gluing, clamping, screwing and the like.
  • the second edge magnetic yoke 2425g is disposed on the second end surface of the edge magnet 2425c by means of gluing, clamping, threading and the like.
  • the magnetic field lines can be restrained by the first central magnetic yoke 2425d, the second central magnetic yoke 2425e, the first edge magnetic yoke 2425f and the second edge magnetic yoke 2425g, which can increase the magnetic current intensity and improve the impact on the first diaphragm.
  • the magnetic circuit system 2425 may not include the first central magnetic yoke 2425d, the second central magnetic yoke 2425e, the first edge magnetic yoke 2425f and the second edge magnetic yoke 2425g.
  • the support assembly 2426 is used to fix the relative position of each component in the magnetic circuit system 2425, and is also used to fix the relationship between each component in the magnetic circuit system 2425 and the first diaphragm group 2421 and the second diaphragm group 2422. relative position. There are many structural forms of the support assembly 2426 that meet this condition. In some embodiments, please refer to FIGS. 10-12 , the support assembly 2426 includes a support plate 2426a, a first support frame 2426b and a second support frame 2426c.
  • the supporting plate 2426a is located between the first central magnet 2425a and the second central magnet 2425b, and the first central magnet 2425a and the second central magnet 2425b are fixed on the supporting plate 2426a by means of gluing, clamping, screwing and the like.
  • the support plate 2426a is mainly used to support the first center magnet 2425a and the second center magnet 2425b, and the material of the support plate 2426a can be a magnetically conductive material or a non-magnetically conductive material. Be specific.
  • the support plate 2426a Since the structural strength of the support plate 2426a directly determines the support effect, in order to ensure the structural strength of the support plate 2426a, the thickness of the support plate 2426a can be increased, but this will increase the thickness of the inner core 242 and the speaker module 24. In order to avoid this problem, the support plate 2426a can be made of a more rigid material (such as stainless steel) to take into account both structural strength and thickness.
  • the edge of the support plate 2426a is provided with an extension 2426a0.
  • the extension part 2426a0 is located between the first magnetic gap K1 and the second magnetic gap K2, and the projections of the first voice coil 2423 and the second voice coil 2424 along the extension direction of the central line O on the extension part 2426a0 are located at the extension part 2426a0 Inside. In this way, the extension part 2426a0 can reduce the influence of airflow turbulence on the first voice coil 2423 and the second voice coil 2424 to a certain extent.
  • the outer edge of the extension part 2426a0 is attached to the inner surface of the side magnet 2425c.
  • the extension portion 2426a0 separates the first magnetic gap K1 from the second magnetic gap K2.
  • the first magnetic gap K1 and the second magnetic gap K2 will not generate air flow, so there will be no air flow turbulence, thereby reducing the influence of air flow on the first voice coil 2423 and the second voice coil 2424 as much as possible.
  • the thickness d1 of the extension part 2426a0 is smaller than the thickness d2 of the support plate 2426a. In this way, it is beneficial to increase the vibration stroke of the first voice coil 2423 in the first magnetic gap K1 and/or increase the vibration stroke of the second voice coil 2424 in the second magnetic gap K2, thereby increasing the first diaphragm group 2421 and/or the amplitude of the second diaphragm group 2422 to improve the low-frequency loudness of the speaker module 24.
  • the first support frame 2426b is located between the first diaphragm group 2421 and the support plate 2426a.
  • the first diaphragm group 2421 is supported on the first supporting frame 2426b.
  • one circumference of the edge of the first diaphragm group 2421 can be fixed to one circumference of the first support frame 2426b by means of gluing, clamping, screw connection, etc., so as to support the first diaphragm group 2421 .
  • the second support frame 2426c is located between the second diaphragm group 2422 and the support plate 2426a.
  • the second diaphragm group 2422 is supported on the second supporting frame 2426c.
  • one round of the edge of the second diaphragm group 2422 may be fixed to one round of the second support frame 2426c by means of gluing, clamping, screwing, etc., so as to support the second diaphragm group 2422 .
  • the first support frame 2426b, the support plate 2426a, and the second support frame 2426c are relatively fixed.
  • first support frame 2426b, the support plate 2426a, and the second support frame 2426c can be fixed two by two in sequence. That is to say, the first support frame 2426b is fixed to the support plate 2426a, and the support plate 2426a is also fixed to the second support frame 2426c.
  • FIG. 13 is a perspective view of the support assembly 2426 in the inner core 24 shown in FIG. 10
  • FIG. 14 is an exploded view of the support assembly 2426 shown in FIG. 13
  • the first support frame 2426b is fixedly connected with the second support frame 2426c.
  • the edge of the support plate 2426a is provided with a fixing portion 2426a1.
  • the fixing part 2426a1 is clamped between the first support frame 2426b and the second support frame 2426c.
  • the fixing part 2426a1 is provided with a first limiting structure
  • the first supporting frame 2426b and/or the second supporting frame 2426c is provided with a second limiting structure.
  • the first limiting structure cooperates with the second limiting structure to prevent the fixing part 2426a1 from moving in the plane where the support plate 2426a is located.
  • first support frame 2426b and the second support frame 2426c are fixed, and the support plate 2426a is limited in the Z-axis direction by the first support frame 2426b and the second support frame 2426c.
  • the second position limiting structure limits the support plate 2426a in the XY plane, thereby fixing the relative position between the support plate 2426a, the first support frame 2426b, and the second support frame 2426c, so that the first support frame 2426b, The second support frame 2426c and the support plate 2426a are fixed together without complicated fixing operations, so the assembly efficiency is high.
  • the first limiting structure may be a limiting column, a limiting hole, a limiting groove, a limiting notch, a limiting protrusion and the like.
  • the second limiting structure may be a limiting hole, a limiting post, a limiting protrusion, a limiting post, a limiting groove, etc., which are not specifically limited here.
  • the number of fixing parts 2426a1 is four, and the four fixing parts 2426a1 are respectively disposed at four corners of the edge of the support plate 2426a.
  • the first limiting structure is a limiting notch 2426a2 disposed on an edge of the fixing portion 2426a1 away from the support plate 2426a.
  • the second limiting structure includes a first limiting column 2426b1 and a second limiting column 2426c1.
  • the first limiting post 2426b1 is disposed on the surface of the first support frame 2426b facing the second support frame 2426c.
  • the second limiting post 2426c1 is disposed on the surface of the second support frame 2426c facing the first support frame 2426b.
  • the first limiting column 2426b1 and the second limiting column 2426c1 are fitly accommodated in the limiting notch 2426a2. In this way, in the process of aligning the first support frame 2426b, the support plate 2426a and the second support frame 2426c to assemble and form the inner core 242, quick alignment can be realized through the first limiting structure and the second limiting structure, thereby The assembly efficiency can be further improved and the assembly difficulty can be reduced.
  • the first support frame 2426b and the second support frame 2426c may be fixed by the first limit post 2426b1 and the second limit post 2426c1.
  • the fixing methods of the first limiting post 2426b1 and the second limiting post 2426c1 include, but are not limited to, gluing, clamping and threaded connection.
  • the first support frame 2426b and the second support frame 2426c may also be fixedly connected through other structures, which are not specifically limited here.
  • the side magnet 2425c is fixed on the first support frame 2426b and/or the second support frame 2426c. That is to say, the side magnet 2425c can be fixed on the first support frame 2426b, also can be fixed on the second support frame 2426c, can also be fixed on the first support frame 2426b and the second support frame 2426c at the same time. Be specific. In some embodiments, please refer to FIG.
  • the side magnet 2425c is fixed on the first edge magnetic yoke 2425f and the second edge magnetic yoke 2425g by gluing or the like, and the first edge magnetic yoke 2425f and the second edge magnetic yoke
  • the yoke 2425g is respectively formed on the first support frame 2426b and the second support frame 2426c through an in-mold decoration (IMD) process.
  • IMD in-mold decoration
  • the surface of the first support frame 2426b facing the second support frame 2426c is provided with a first installation notch 2426b2
  • the surface of the second support frame 2426c facing the first support frame 2426b is provided with a second installation notch 2426c2
  • the first installation notch 2426b2 is matched with the second installation notch 2426c2 to form the installation opening K3 in FIG. 13
  • the installation opening K3 is used to accommodate the side magnet 2425c.
  • the support assembly 2426 provided in the embodiment of the present application can fix the relative positions between the components in the magnetic circuit system 2425 and between the components in the magnetic circuit system 2425 and the first diaphragm group 2421 and the second diaphragm group 2422, And the support assembly 2426 is a sandwich structure composed of the support plate 2426a, the first support frame 2426b, and the second support frame 2426c, so it is beneficial to reduce the processing difficulty of the support assembly 2426, and at the same time reduce the assembly of the support assembly 2426 in the inner core 242 difficulty.
  • FIG. 15 is a schematic cross-sectional structure diagram of the speaker module 24 provided by some embodiments of the present application.
  • the speaker module includes a casing 241 and a core 242 shown in FIGS. 9-11 .
  • the shell 241 can be independent from the C shell 211 and the D shell 212 in FIG. , not specifically limited here.
  • the inner core 242 is disposed in the casing 241 .
  • the casing 241 is divided into a first front chamber C11 , a rear chamber C2 and a second front chamber C12 by the first diaphragm group 2421 and the second diaphragm group 2422 of the inner core 242 .
  • the first voice coil 2423, the second voice coil 2424, the magnetic circuit system 2425 and the support assembly 2426 of the inner core 242 are located in the rear cavity C2.
  • the housing 241 is provided with a sound channel C3. Both the first front chamber C11 and the second front chamber C12 communicate with the sound output channel C3. There can be one or two sounding channels C3.
  • FIG. 15 only shows an example in which there are two sound channels C3, which should not be regarded as a special limitation to the present application.
  • the speaker module 24 provided by the present application includes the core 242 shown in FIGS. 9-11 , the two can solve the same technical problem and achieve the same effect.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

La présente invention concerne le domaine technique des dispositifs électroniques, et fournit un noyau interne, un module de haut-parleur, et un dispositif électronique, qui peuvent améliorer l'intensité sonore des basses fréquences et réduire le murmure en même temps. Le cœur intérieur comprend un premier groupe de membranes, un second groupe de membranes, une première bobine acoustique, une seconde bobine acoustique, et un système de circuit magnétique. Le premier groupe de membranes, le second groupe de membranes, la première bobine acoustique et la seconde bobine acoustique sont fournis en utilisant une même ligne centrale; la première bobine acoustique, la seconde bobine acoustique et le système de circuit magnétique sont situés entre le premier groupe de membranes et le second groupe de membranes; la première bobine acoustique est fixée sur le premier groupe de membranes, et la seconde bobine acoustique est fixée sur le second groupe de membranes. Le système de circuit magnétique comprend un premier aimant central, un second aimant central et des aimants de bord. La direction du second aimant central du pôle S au pôle N est cohérente avec la direction du premier aimant central du pôle S au pôle N, et la direction de chaque aimant de bord du pôle S au pôle N est opposée à la direction du premier aimant central du pôle S au pôle N. Le module de haut-parleur proposé dans les modes de réalisation de la présente invention est appliqué au dispositif électronique.
PCT/CN2022/074839 2021-06-02 2022-01-28 Noyau interne, module de haut-parleur et dispositif électronique WO2022252666A1 (fr)

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CN202110615973.6A CN114501245B (zh) 2021-06-02 2021-06-02 一种内核、扬声器模组和电子设备
CN202110615973.6 2021-06-02

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CN117676441A (zh) * 2022-08-31 2024-03-08 荣耀终端有限公司 扬声器模组及电子设备

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CN109788406A (zh) * 2018-12-27 2019-05-21 歌尔股份有限公司 磁路***和发声装置
CN209283487U (zh) * 2019-01-15 2019-08-20 歌尔科技有限公司 双面发声器件和电子产品

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