WO2020000925A1 - 发声器件及便携终端 - Google Patents

发声器件及便携终端 Download PDF

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Publication number
WO2020000925A1
WO2020000925A1 PCT/CN2018/121128 CN2018121128W WO2020000925A1 WO 2020000925 A1 WO2020000925 A1 WO 2020000925A1 CN 2018121128 W CN2018121128 W CN 2018121128W WO 2020000925 A1 WO2020000925 A1 WO 2020000925A1
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WO
WIPO (PCT)
Prior art keywords
diaphragm
central
magnetic circuit
magnetic
hole
Prior art date
Application number
PCT/CN2018/121128
Other languages
English (en)
French (fr)
Inventor
王兴龙
葛连山
刘春发
Original Assignee
歌尔股份有限公司
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.)
Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Priority to US17/256,607 priority Critical patent/US11477577B2/en
Publication of WO2020000925A1 publication Critical patent/WO2020000925A1/zh

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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
    • 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
    • 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
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers
    • 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
    • H04R2499/11—Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's

Definitions

  • the invention relates to the technical field of electroacoustics, and in particular, to a sound generating device and a portable terminal.
  • speakers are widely used as important components of terminals with audio playback functions.
  • the prior art provides a speaker using two sets of voice coils and a magnetic circuit system. However, such speakers are usually large in size and difficult to be widely used.
  • the main purpose of the present invention is to provide a sounding device, which aims to solve the technical problem that the existing sounding device that realizes two-way sound is difficult to be widely used due to its large size.
  • the sound generating device includes a first vibration system, a second vibration system, and a magnetic circuit system.
  • the first vibration system includes a first diaphragm and a voice coil provided inside the first diaphragm, and the first diaphragm includes a first center portion;
  • the second vibration system includes a second vibration film disposed opposite to the first vibration film, and the second vibration film includes a second central portion;
  • the magnetic circuit system is provided between the first diaphragm and the second diaphragm, and the voice coil is housed in a magnetic gap of the magnetic circuit system; the magnetic circuit system is provided with an escape hole; the first At least one of a central portion and a second central portion extends into the avoidance hole to fixedly connect the first central portion and the second central portion.
  • the first central portion includes: a first planar portion and a first reinforcing portion combined with the first planar portion;
  • the second central portion includes: a second plane portion and a second reinforcing portion combined with the second plane portion;
  • At least one of the first center portion and the second center portion extending into the avoidance hole to fixedly connect the first center portion and the second center portion includes:
  • At least one of the first reinforcement portion and the second reinforcement portion extends into the avoidance hole to fixedly connect the first reinforcement portion and the second reinforcement portion.
  • a first acoustic cavity is formed between the magnetic circuit system and the first diaphragm
  • a second acoustic cavity is formed between the magnetic circuit system and the second diaphragm
  • the avoidance hole communicates with the first Acoustic cavity and second acoustic cavity.
  • the first reinforcing portion includes a first convex portion extending into the avoidance hole
  • the second reinforcing portion includes a second convex portion extending into the avoiding hole.
  • the first convex portion and The second convex portion is fixedly connected in the avoidance hole.
  • the first convex portion and the second convex portion are in surface contact and fixed connection.
  • the first convex portion and the second convex portion are gradually tapered toward each other.
  • a longitudinal cross-sectional shape of a side wall of the first convex portion and / or the second convex portion is stepped, arc-shaped, or linear.
  • a cross-sectional shape of the first convex portion and / or the second convex portion is rectangular or circular.
  • the magnetic circuit system includes a magnetically permeable yoke, and a central magnetic circuit portion and a side magnetic circuit portion provided on the magnetic yoke; and a space is formed between the central magnetic circuit portion and the side magnetic circuit portion to accommodate the sound Magnetic gap
  • At least one of the central magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet; a middle portion of the magnetically conductive yoke and the central magnetic circuit portion cooperate to form the avoidance hole.
  • the central magnetic circuit portion includes a central magnetic steel provided in the middle of the magnetic yoke and a central magnetic conductive plate provided on the top of the central magnetic steel.
  • the magnetic yoke is provided with a first inner hole.
  • the center magnetic steel is provided with a second inner hole, and the center magnetic plate is provided with a third inner hole.
  • the first inner hole, the second inner hole, and the third inner hole communicate with each other to form the center avoidance. hole.
  • the inner wall surface of the first inner hole is enclosed with the top surface of the central magnetic steel to form a first step-shaped recess; and / or the inner wall surface of the third inner hole is enclosed with the bottom surface of the central magnetic steel.
  • a second step-shaped recess is formed.
  • the edge magnetic circuit portion includes a baffle plate formed by bending from an outer peripheral edge of the magnetically conductive yoke; or, the edge magnetic circuit portion includes a plurality of edge magnetic steels provided on the periphery of the central magnetic steel.
  • an opening is formed in the middle of the magnetic yoke, and the edge of the opening is bent and extended in the direction of the first diaphragm to form a flange, and the flange forms the central magnetic circuit portion, and the flange surround
  • the avoidance hole is formed together;
  • the side magnetic circuit part includes a plurality of side magnetic steels provided on the periphery of the flanging, and a side magnetic guide plate provided on the top of the side magnetic steel.
  • a plurality of the flangings are provided, and a plurality of the flangings are provided at intervals along the edge of the opening.
  • the first diaphragm further includes a first folded ring portion provided around the first central portion, and a first fixed portion provided around the first folded ring portion;
  • the second diaphragm further includes a second folded ring portion provided around the second central portion, and a second fixed portion provided around the second folded ring portion;
  • the first central portion and the second central portion are both planar sheet-like structures, and the first folded ring portion and / or the second folded ring portion are structures formed by one protrusion, or the first folded ring
  • the portion and / or the second folded ring portion is a wavy structure composed of at least one protrusion and at least one depression.
  • the present invention also provides a portable terminal, which includes a housing, and the housing has an accommodating cavity.
  • the portable terminal further includes a sound emitting device as described above, and the sound emitting device is installed in the accommodating cavity.
  • the body is provided with a first sound hole corresponding to the first diaphragm and a second sound hole corresponding to the second diaphragm.
  • the housing includes a front surface and a rear surface opposite to each other, the first sound hole is provided on the front surface, and the second sound hole is provided on the reverse surface.
  • the structure of the sound generating device in the present invention adopts two sets of vibration systems, but only one set of voice coil and magnetic circuit system can be used to achieve two-way sound.
  • the structure occupies a small volume, can be adapted to a relatively small installation space, and is widely used in portable applications. terminal.
  • the sound generating device of the present invention works, the first diaphragm of the first vibration system is directly driven by the magnetic circuit system. Since the first sound cavity and the second sound cavity are provided with an escape hole for communication, the first central portion and the second central portion communicate with each other. At least one of them extends into the avoidance hole to be fixedly connected.
  • the second diaphragm of the second vibration system emits sound synchronously, that is, the first diaphragm and the second diaphragm make sound in conjunction.
  • the sound generating device of the present invention can emit sound in two directions of the portable terminal through the first vibration system and the second vibration system, respectively.
  • FIG. 1 is a schematic front structural diagram of an embodiment of a sound generating device according to the present invention
  • FIG. 2 is a schematic diagram of a rear structure of the sound generating device in FIG. 1;
  • FIG. 2 is a schematic diagram of a rear structure of the sound generating device in FIG. 1;
  • FIG. 3 is a schematic cross-sectional structure diagram of the sound generating device in FIG. 1, which illustrates a first embodiment of a magnetic circuit system, a first diaphragm, and a second diaphragm;
  • FIG. 4 is a partially enlarged view at A in FIG. 3.
  • FIG. 5 is a schematic cross-sectional structure diagram of the sound generating device in FIG. 1;
  • FIG. 6 is a schematic structural diagram of a first embodiment of a first reinforcing portion and a second reinforcing portion in the sound generating device shown in FIG. 3;
  • FIG. 7 is a schematic structural diagram of a second embodiment of a first reinforcing portion and a second reinforcing portion shown in FIG. 6;
  • FIG. 8 is a schematic structural diagram of a third embodiment of the first reinforcing portion and the second reinforcing portion shown in FIG. 6;
  • FIG. 9 is a schematic structural diagram of a fourth embodiment of the first reinforcing portion and the second reinforcing portion shown in FIG. 6;
  • FIG. 10 is a schematic structural diagram of a fifth embodiment of the first reinforcing portion and the second reinforcing portion shown in FIG. 6;
  • FIG. 11 is a schematic structural diagram of an embodiment of a magnetic circuit system of the sound generating device in FIG. 3;
  • FIG. 12 is a cross-sectional view of the magnetic circuit system shown in FIG. 11;
  • FIG. 13 is a schematic structural diagram of another embodiment of a magnetic circuit system of the sound generating device in FIG. 3;
  • FIG. 14 is a sectional view of the magnetic circuit system shown in FIG. 13;
  • FIG. 15 is a cross-sectional view of a first reinforcing portion and a second reinforcing portion shown in FIG. 6;
  • FIG. 16 is a cross-sectional view of the first reinforcing portion and the second reinforcing portion shown in FIG. 10;
  • FIG. 17 is a cross-sectional view of still another embodiment of the first reinforcing portion and the second reinforcing portion shown in FIG. 15;
  • FIG. 18 is a cross-sectional view of still another embodiment of the first reinforcing portion and the second reinforcing portion shown in FIG. 15;
  • FIG. 19 is a cross-sectional view of another embodiment of the first reinforcing portion and the second reinforcing portion shown in FIG. 15;
  • FIG. 20 is an exploded view of the speaker shown in FIG. 1;
  • FIG. 21 is a schematic structural diagram of an embodiment of a second diaphragm in the sound generating device shown in FIG. 1;
  • FIG. 22 is a schematic structural diagram of another embodiment of a second diaphragm in the sound generating device shown in FIG. 1;
  • FIG. 23 is a schematic structural view of a first embodiment of a central magnetic steel in a magnetic circuit system of a sound generating device according to the present invention.
  • FIG. 24 is a schematic structural diagram of a second embodiment of a central magnetic steel in a magnetic circuit system of a sound generating device according to the present invention.
  • 25 is a schematic structural diagram of a third embodiment of a central magnetic steel in a magnetic circuit system of a sound generating device according to the present invention.
  • 26 is a schematic structural diagram of a fourth embodiment of a central magnetic steel in a magnetic circuit system of a sound generating device according to the present invention.
  • FIG. 27 is a schematic front structural diagram of another embodiment of a sound generating device according to the present invention.
  • FIG. 28 is a schematic structural diagram of a rear surface of another embodiment of a sound generating device according to the present invention.
  • FIG. 29 is a sectional view of the sound generating device shown in FIG. 27;
  • FIG. 30 is an exploded view of the sound generating device shown in FIG. 27;
  • FIG. 31 is a schematic structural diagram of a first embodiment of a magnetic circuit system in the sound generating device shown in FIG. 27;
  • FIG. 32 is a schematic structural diagram of a second embodiment of a magnetic circuit system in the sound generating device shown in FIG. 27;
  • FIG. 33 is a schematic structural diagram of a third embodiment of a magnetic circuit system in the sound generating device shown in FIG. 27;
  • FIG. 34 is a schematic structural diagram of a fourth embodiment of a magnetic circuit system in the sound generating device shown in FIG. 27;
  • 35 is a schematic front structural diagram of an embodiment of a portable terminal according to the present invention.
  • FIG. 36 is a schematic diagram of a rear structure of the portable terminal in FIG. 35.
  • first vibration system 11: first diaphragm; 111: first central portion; 111a: first flat portion; 112, 113, 114: first reinforcing portion; 113a, 113b, 113c, 113d, 113e: first convex portion ; 115: first folded ring portion; 117: first fixed portion; 12: voice coil;
  • 2 second vibration system
  • 21a, 21b second diaphragm
  • 211 second central portion
  • 211a second flat portion
  • 212a, 212b second folded ring portion
  • 213 second fixed portion
  • 214, 215, 216 first Second reinforcement part
  • 214a, 214b, 214c, 214d, 214e the second convex part
  • 3a, 3b magnetic circuit system
  • 31 magnetic gap
  • 32a, 32b avoidance hole
  • 32c side through hole
  • 33 air flow channel
  • 34a, 34b magnetic yoke
  • 341 first inner hole
  • 341a first Step-shaped recesses
  • 343 baffle plate
  • 341b opening
  • 343b, 343c flange
  • 35a, 35b central magnetic steel
  • 351a, 351b, 351c, 351d second inner hole
  • 352b, 352c sub-magnetic steel
  • 352d Slit
  • 36 center magnetically conductive plate
  • 361 third inner hole
  • 361a second stepped recess
  • 37 edge magnetic steel
  • 38, 38a edge magnetic conductive plate
  • the directional indication is only used to explain in a specific posture (as shown in the accompanying drawings) (Shown) the relative positional relationship and movement of each component, etc., if the specific posture changes, the directivity indication will change accordingly.
  • the present invention provides a sound generating device 210.
  • the sound generating device 210 includes a first vibration system 1, a second vibration system 2, and a magnetic circuit system 3 a.
  • the first vibration system 1 includes a first vibration system 1.
  • the membrane 11 and a voice coil 12 provided inside the first diaphragm 11, the first diaphragm 11 includes a first central portion 111;
  • the second vibration system 2 includes a second vibration film 21a opposite to the first vibration film 11, and the second vibration film 21a includes a second center portion 211.
  • the magnetic circuit system 3a is provided between the first diaphragm 11 and the second diaphragm 21a, and the voice coil 12 is housed in the magnetic gap 31 of the magnetic circuit system 3a; the magnetic circuit system 3a is provided with an avoidance Hole 32a; at least one of the first central portion 111 and the second central portion 211 extends into the avoidance hole 32a to fixedly connect the first central portion 111 and the second central portion 211.
  • the position when the first diaphragm 11 of the sounding device 210 is placed upward is used as a reference to define the upper and lower sides, that is, the side of the first diaphragm 11 facing away from the magnetic circuit system 3a is up.
  • the side of a diaphragm 11 facing the magnetic circuit system 3a is downward.
  • the first vibration system 1 can refer to the existing form. Specifically, the voice coil 12 is fixedly connected to the first diaphragm 11 and extends into the magnetic gap 31. The current flowing through the voice coil 12 changes due to the amperage of different magnitudes. The vibration of the voice coil 12 drives the first diaphragm 11 to vibrate, and its energy conversion mode is electric energy-mechanical energy-acoustic energy. In order to adjust the frequency characteristics of the vibration, the first vibration system 1 may further include a weight (not shown).
  • the form of the magnetic circuit system 3a can also refer to the existing structure.
  • the plan shape of the center magnetic steel 35a can be either a circle or a rounded rectangle.
  • the sound generating device 210 further includes a housing 7, a front cover 8 and a rear cover 9, and the housing 7 is configured to receive the first vibration System 1, second vibration system 2, and magnetic circuit system 3a.
  • the front cover 8 and the rear cover 9 cooperate with the housing 7 to form a protective frame.
  • the edge portion of the first diaphragm 11 for fixing is clamped by the front cover 8 and the housing 7, and the second diaphragm 21a is used for fixing the edge portion. It is sandwiched between the back cover 9 and the casing 7.
  • the front cover 8 is provided corresponding to the first vibration system 1 and is provided with a front sound emitting hole for sound emission
  • the rear cover 9 is corresponding to the second vibration system 2 and is provided with a rear sound output hole for sound emission.
  • the sound generating device 210 includes the magnetic circuit system 3a and the voice coil 12, and the voice coil 12 is connected to the first diaphragm 11, after a current is passed to the voice coil 12, The voice coil 12 is vibrated by the ampere force, thereby driving the first diaphragm 11 to vibrate.
  • the structure of the sound generating device 210 uses two sets of vibration systems, but only one set of voice coil 12 and magnetic circuit system 3 can be used to achieve two-way sound. The structure occupies a small volume and can be adapted to relatively small installations.
  • the space is convenient to be widely applied to the portable terminal 100.
  • only the first diaphragm 11 and the second diaphragm 21a can be connected by themselves, and an extra connecting member is omitted, so that the cost of the sound generating device 210 can be reduced.
  • the first central portion 211 includes a first planar portion 111a and a first reinforcing portion 113 combined with the first planar portion 111a.
  • the second central portion includes a second planar portion 211a and a second reinforcing portion 214 combined with the second planar portion 211a.
  • At least one of the first reinforcing portion 113 and the second reinforcing portion 214 extends into the avoidance hole 32a so that the first reinforcing portion 113 and the second reinforcing portion 214 are fixedly connected.
  • first and second reinforcing portions 113 and 214 can increase the hardness of the first and second diaphragms 11 and 21a, and ensure the high-frequency performance of the first and second diaphragms 11 and 21a.
  • the fixed connection between the first reinforcing portion 113 and the second reinforcing portion 214 may be glue bonding or integrally formed by injection molding.
  • At least one of the first reinforcing portion 113 and the second reinforcing portion 214 extends into the avoidance hole 32a to be connected to each other. Therefore, at least one of the first reinforcing portion 113 and the second reinforcing portion 214 includes a dome shape. Like structure.
  • the materials of the first and second reinforcing portions 113 and 214 include, but are not limited to, Kapton (polyimide (PI) film material), PEN (poly Plastic materials such as polyethylene naphthalate), PI (polyimide), LCP (Liquid Crystal Polymer), PC (polycarbonate), PPA (Polyphthalamide) It is a metal material such as aluminum foil / magnesium aluminum alloy / magnesium lithium alloy.
  • the processing methods of the first reinforcing portion 113 and the second reinforcing portion 214 include, but are not limited to, blow molding, injection molding, stamping, and hot pressing.
  • first reinforcing portion 113 and the second reinforcing portion 214 may be a single-layer structure or a multilayer composite structure, which is not limited in the present invention.
  • the first diaphragm 11 of the first vibration system 1 is directly driven by the magnetic circuit system 3a. Since the first sound cavity 5 and the second sound cavity 6 are provided with an escape hole 32a, the first At least one of the reinforcing part 113 and the second reinforcing part 214 extends into the avoidance hole 32a for fixed connection.
  • the first reinforcing part 113 drives the second reinforcing part 214
  • the second diaphragm 21a is vibrated so that when the first diaphragm 11 of the first vibration system 1 is vibrated and sounded, the second diaphragm 21a of the second vibration system 2 is simultaneously vibrated and sounded, that is, the first diaphragm 11 In conjunction with the second diaphragm 21a, a sound is produced.
  • a first acoustic cavity 5 is formed between the magnetic circuit system 3a and the first diaphragm 11
  • a second acoustic cavity 6 is formed between the magnetic circuit system 3a and the second diaphragm 21, and the avoidance
  • the hole 32 a communicates with the first acoustic cavity 5 and the second acoustic cavity 6.
  • the resistance to the vibration of the first diaphragm 11 and the second diaphragm 21 is also relatively small, so that better acoustic performance can be achieved.
  • the sound generating device 210 of the present invention can emit sound in two directions of the portable terminal 100 through the first vibration system 1 and the second vibration system 2 respectively.
  • the first reinforcing portion 113 of the first diaphragm 11 and the second reinforcing portion 214 of the second diaphragm 21a are both provided with a portion protruding into the avoidance hole 32a.
  • the first reinforcing portion 113 includes a first convex portion 113a extending into the avoidance hole 32a
  • the second reinforcing portion 214 includes a second convex portion 214a extending into the avoidance hole 32a.
  • the convex portion 113a and the second convex portion 214a are fixedly connected in the avoidance hole 32a.
  • the first convex portion 113a is directly formed by the first reinforcing portion 113, and the inside of the first convex portion 113a is hollow.
  • This structure can not only ensure the structural strength during transmission, but also reduce the The mass reduces the energy loss, so that the vibration transmitted by the first convex portion 113a can be more significant, and the high-frequency performance of the sound emitting device can be improved.
  • the second convex portion 214a has the same structure as the first convex portion 113a, which facilitates processing and improves production efficiency.
  • the shapes of the first reinforcing portion 113 and the second reinforcing portion 214 are rectangular, or the shapes of the first reinforcing portion 114 and the second reinforcing portion 215 are rectangular.
  • the shape is round.
  • the cross-sectional shape of the first convex portion 113a and the second convex portion 214a is rectangular, or the cross-sectional shape of the first convex portion (113b, 113c) and the second convex portion (214b, 214c) is circular, or The shapes of the two can be combined arbitrarily.
  • the cross-sectional shape of the avoidance hole 32 a also includes circular and rectangular embodiments, which can be matched with the first convex portion 113 a and the second convex portion 214 a, so that the first convex portion The portion 113a and the second convex portion 214a are better accommodated therein, which facilitates a fixed connection.
  • the cross-section of the avoidance hole 32a is circular; when the first convex portion 113a and the second convex portion are circular.
  • the cross section of 214a is pitch, the cross section of the avoidance hole 32a is also rectangular, and the rectangles here are rounded rectangles, so that the air flow in the avoidance hole 32a is smoother, without sharp parts, which improves The smoothness of the sound produced by the sound generating device 210 and the comfort of the user.
  • the first convex portion 113 a and the second convex portion 214 a are in surface contact and fixedly connected.
  • first convex portion 113a and the second convex portion 214a are respectively provided in the middle portion of the first reinforcement portion 113 and the middle portion of the second reinforcement portion 214, and the outer periphery of the first reinforcement portion 113 and the first plane
  • the portion 111a is connected, and the outer peripheral edge of the second reinforcing portion 214 is connected to the second planar portion 211a.
  • first planar portion 111a and the second planar portion 211a are both planar sheet-like structures, and a reinforcing hole (not labeled) is opened in the middle of the two, and the outer periphery of the first reinforcing portion 113 and the second reinforcing portion 214 The edge overlap is combined with the peripheral edge of the avoidance hole to increase the overall strength of each of the first diaphragm 11 and the second diaphragm 21a.
  • the first convex portion 113a and the second convex portion 214a are provided in surface contact and fixed connection, that is, the bottom wall of the first convex portion 113a and the second convex portion 214a.
  • the bottom wall of the first convex portion 113a and the bottom wall of the second convex portion 214a have a certain area size requirement. The larger the area, the greater the adhesive force, and the same is true for integral injection molding or welding.
  • the vertical cross-sectional shapes of the first convex portion 113a and the second convex portion 214a are set to a standard U-shape, an expanded U-shape, or an approximate U-shape, and only a flat bottom wall is required to ensure that Fastness to late bonding.
  • the first and second convex portions 113a and 113a 214a is tapered toward each other, that is, the cross-sectional area of the first convex portion 113a gradually decreases in the direction of the second diaphragm 21a, and the cross-sectional area of the second convex portion 214a gradually decreases in the direction of the first diaphragm 11
  • the configuration of the structure can increase the structural strength of the first reinforcing portion 113 and the second reinforcing portion 214 itself, and can also increase the connection strength between the first convex portion 113a and the second convex portion 214a.
  • first convex portion 113a and the second convex portion 214a can also indirectly widen the airflow passage 33, thereby increasing the effective flow area. In this way, the first acoustic cavity 5 and the second acoustic cavity 6 can be further promoted. Air connectivity between.
  • first convex portion 113a and the second convex portion 214a may be provided in a tapered shape toward the other, or neither of them may be tapered, which is not limited herein.
  • the longitudinal cross-sectional shape of the side wall of the first convex portion 113a and / or the second convex portion 214a is stepped, arc-shaped, or linear.
  • the longitudinal cross-section is stepped, that is, the sidewalls of the first convex portion 113 a and the second convex portion 214 a are Multi-stage bending setting, this structure can further improve the strength of the first convex portion 113a and the second convex portion 214a, and at the same time increase the connection strength of the first reinforcing portion 113 and the second reinforcing portion 214, in order to obtain better Sound effects.
  • the longitudinal cross-sectional shape of the side wall of the first convex portion (113c, 113e) and / or the second convex portion (214c, 214e) is arc-shaped.
  • the arc-shaped side wall may bulge in the direction of the avoidance hole 32a, or may be recessed in a direction away from the avoidance hole 32a.
  • the first convex portion (113c, 113e) and the second convex portion ( 214c, 214e) have higher structural strength, so as to obtain better connection strength.
  • the second embodiment can also be set in combination with the stepped shape in the first embodiment.
  • This structure is the third embodiment.
  • the first convex portions (113b, 113d) and The second convex portions (214b, 214d) combine the advantages of the two, which can further obtain higher structural strength and ensure the stability of the connection between the first diaphragm 11 and the second diaphragm 21a.
  • first central portion 111 of the first diaphragm 11 and the second central portion 211 of the second diaphragm 21a may also have a planar structure, that is, the first central portion 111 of the first diaphragm 11 and the first
  • the second central portion 211 of the two-vibration membrane 21a is an overall structure, and of course, it can also have other structures, as long as the first-vibration membrane and the second-vibration membrane can be fixedly connected in the avoidance hole, which is not limited in the present invention.
  • the magnetic circuit system 3 a includes a magnetically permeable yoke 34 a and a central magnetic circuit portion and an edge magnetic circuit portion (both are provided on the magnetic yoke 34 a). Not marked);
  • a magnetic gap 31 accommodating the voice coil 12 is formed between the central magnetic circuit portion and the side magnetic circuit portion; at least one of the central magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet;
  • a middle portion of the magnetic yoke 34a and a central magnetic circuit portion cooperate to form the avoidance hole 32a.
  • the central magnetic circuit portion may include a central magnetic steel 35a or a side wall of the magnetic yoke 34a
  • the lateral magnetic circuit portion may be a side magnetic steel 37 or a side wall of the magnetic yoke 34a.
  • At least one of the central magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet, which can ensure the magnetic stability of the magnetic circuit portion, thereby providing a more stable magnetic field, thereby making the vibration of the first diaphragm 11 more stable. The stability of the sound produced by the sound emitting device 210 is ensured.
  • the central portion of the first diaphragm 11 corresponding to the central magnetic circuit portion is usually the largest, the central portion of the first diaphragm 11 and the central portion of the second diaphragm 21a are fixedly connected through the avoidance hole 32a, so that the first diaphragm The diaphragm 11 is more labor-saving when pushing the second diaphragm 21a.
  • the central magnetic circuit portion of the magnetic circuit system 3a includes a central magnetic steel 35a provided in the middle of the magnetic yoke 34a and a central magnetic plate 36 provided on the top of the central magnetic steel 35a.
  • a first inner hole 341 is opened in the magnetic yoke 34a
  • a second inner hole 351a is opened in the central magnetic steel 35a
  • a third inner hole 361 is opened in the central magnetic guide plate 36
  • a first inner hole 341 is opened.
  • the second inner hole 351a and the third inner hole 361 communicate with each other to form an escape hole 32a.
  • the magnetic circuit system 3a is provided with a magnetic yoke 34a, a central magnetic steel 35a, and a central magnetic plate 36 in order from the bottom to the top.
  • a first inner hole 341 is formed in the magnetic yoke 34a, and the central magnetic
  • the steel 35a is provided with a second inner hole 351a
  • the magnetic conductive plate 36 is provided with a third inner hole 361.
  • the first inner hole 341, the second inner hole 351a, and the third inner hole 361 communicate with each other to form a central avoidance hole 32a, that is, avoidance
  • the hole 32a directly penetrates the permeable yoke 34a, the center magnetic steel 35a, and the permeable plate 36, and the first and second diaphragms 21a and 21a are fixedly connected in the avoidance hole 32a.
  • the linkage is simple in form and is beneficial to promoting gas circulation between the first acoustic cavity 5 and the second acoustic cavity 6.
  • an example of the side magnetic circuit portion includes a baffle plate 343 formed by bending from the outer peripheral edge of the magnetic yoke 34 a.
  • a magnetic gap 31 is formed between the central magnetic steel 35 a and the baffle plate 343. between.
  • the magnetic circuit system 3a may be provided with two edge magnetic steels 37 or four edge magnetic steels 37.
  • the magnetic circuit system 3a is further provided with a side through hole 32c at the position of the magnetic gap 31.
  • the connectivity between the first acoustic cavity 5 and the second acoustic cavity 6 is further increased, and when the first diaphragm 11 vibrates, the energy per unit time can be increased.
  • a plurality of side through holes 32 c are provided, and the plurality of side through holes 32 c are arranged at intervals along the circumferential direction of the magnetic gap 31. In this way, both the balance of the communication can be ensured and the magnetic circuit can be balanced.
  • the side through-hole 32c is opened in the magnetic yoke 34a. Since the magnetically yoke 34a is closest to the second acoustic cavity 6 than the center magnetic steel 35a and the magnetically permeable plate 36, it is also most convenient for the side through hole 32c to be opened in the magnetically yoke 34a.
  • the central magnetic steel 35b is composed of one magnetic steel, and the central magnetic steel 35b is provided with a slit 352d that communicates with the inner wall surface of the second inner hole 351c and the outer peripheral surface of the central magnetic steel 35b.
  • the second inner hole 351c can be conveniently processed by the wire cutting process.
  • the slit 352d can be processed first, and then the second inner hole 351c can be processed, compared to directly drilling the second inner hole. 351c is more practical. In this way, processing difficulty can be reduced and processing costs can be reduced.
  • the central magnetic steel may further include two sub-magnetic steels (352b, 352c) spliced together, and a slit 352d of the two sub-magnetic steels (352b, 352c) is connected to the second inner hole (351b, 351d).
  • the second inner hole (351b, 351d) is formed by splicing the two sub-magnetic steels (352b, 352c), and the inner wall surface of the second inner hole (351b, 351d) is actually converted into the sub-magnetic steels (352b, 352c).
  • the outer peripheral surface that is, the groove wall surface that is open on the outer peripheral surface of the sub-magnetic steel (352b, 352c), can facilitate the processing of the second inner hole (351b, 351d). Further, in order to facilitate the assembly and improve the interchangeability of the raw materials of the two magnets (352b, 352c), the two magnets (352b, 352c) pass through the vertical plane of the center of the second inner hole (351b, 351d).
  • the symmetrical or two-member magnetic steel (352b, 352c) is symmetrical about the center of the second inner hole (351b, 351d).
  • the blanks of the two magnets (352b, 352c) before being magnetized can be spliced first, and then magnetized, and the blanks of the two magnets (352b, 352c) can be interchanged, so only the It is sufficient to provide a blank of a shape and size.
  • the first diaphragm 11, the second diaphragm (21a, 21b), and the central magnetic steel (35a, 35b) are all long strips.
  • the long axis of the central magnetic steel (35a, 35b) are located in the same vertical plane, and the avoidance hole 32a extends along the length direction of the central magnetic steel (35a, 35b).
  • the vertical plane is a plane parallel to the up-down direction, and the shape of the sound emitting device 210 is also a long strip. This structure has a higher space utilization rate when applied to the portable terminal 100.
  • the long first diaphragm 11 and the second diaphragm (21a, 21b) are easier to obtain a larger amplitude, and it is easier for the first diaphragm 11 to drive the second diaphragm Film (21a, 21b).
  • the cross section of the first convex portion (113a, 113b, 113c, 113d, 113e) and the second convex portion (214a, 214b, 214c, 214d, 214e) are elongated, and the major axis and avoidance of the cross section of the two
  • the long axis of the hole 32a is located in the same vertical plane, and the connection area of the first diaphragm 11 and the second diaphragm (21a, 21b) will also increase.
  • the inner wall surface of the first inner hole 341 and the top surface of the central magnetic steel 35a are enclosed to form a first step-shaped recess 351a; and / or the inner wall surface of the third inner hole 361 and the central magnet
  • the bottom surface of the steel 35a is enclosed to form a second stepped recess 361a.
  • a vertical cross-sectional shape of a sidewall of the first convex portion 113a and the second convex portion 214a may be stepped. Shape, and the first convex portion 113a and the second convex portion 214a are symmetrically arranged with the cross section of the central magnetic steel 35a as a mirror surface.
  • the first convex portion 113a and the second convex portion 214a In order to better accommodate the first convex portion 113a and the second convex portion 214a, correspondingly, the first The inner wall surface of the inner hole 341 is enclosed with the top surface of the central magnetic steel 35a to form a first stepped recess 351a, and the inner wall surface of the third inner hole 361 is enclosed with the bottom surface of the central magnetic steel 35a to form a second stepped shape.
  • the concave portion 361a can make the space between the side wall of the first convex portion 113a and the inner wall surface of the avoidance hole larger, and provide a larger space for the linkage between the first convex portion 113a and the second convex portion 214a. With more circulation space, the air pressure between the first acoustic cavity 5 and the second acoustic cavity 6 is more balanced, and the resistance caused is further reduced.
  • a section of the stepped sidewall of the first convex portion 113a and the second convex portion 214a away from the central magnetic steel is set as a first step, and the height of the first step does not exceed the thickness of the central magnetic plate 36 and the magnetic yoke.
  • the thickness of 34aa makes the first convex portion 113a and the second convex portion 214a have more free space for vibration and sound.
  • an opening 341b is formed in the middle of the magnetic yoke 34b, and the edge of the opening 341b is bent and extended to the direction of the first diaphragm 11.
  • the edge magnetic circuit portion includes a plurality of edge magnetics provided on the periphery of the flange 343b.
  • Steel 37, and an edge magnetically permeable plate 38 provided on top of the edge magnetic steel 37.
  • an opening 341b is formed in a middle portion of the magnetic yoke 34b, and an edge of the opening 341b is bent and extended in the direction of the first diaphragm 11 to form a flange 343b.
  • the shape of the flange 343b is rectangular, and The shapes of the convex portion 113a and the second convex portion 214a are matched to receive the first convex portion 113a and the second convex portion 214a.
  • the flange 343b also forms a central magnetic circuit portion, and a magnetic gap 31 is formed between several edge magnetic steels 37 on the periphery of the flange 343b. This structure is simple, easy to process and implement, and can form the avoidance hole 32b.
  • the magnetic gap 31 is formed to further reduce the weight of the sound generating device 210.
  • the flange 343b structure may be a ring structure continuously arranged along the periphery of the opening 341b, or a plurality of flanges 343c may be provided at intervals along the edge of the opening 341b. In order to further increase the space for airflow, improve the sound effect.
  • the edge magnetic steel 37 forming the edge magnetic circuit part may be provided with two to four, correspondingly, the edge magnetic guide plate 38 provided on the top of the edge magnetic steel 37 may be provided with two to four correspondingly; or four At this time, the side magnetically conductive 38a covers the tops of the four side magnetic steels 37 in a ring structure, which can facilitate batch processing.
  • the first diaphragm 11 further includes a first folding ring portion 115 provided around the first planar portion 111 a and a first fixing portion 117 provided around the first folding ring portion 115.
  • the second diaphragm (21a, 21b) includes a second folded ring portion (212a, 212b) provided around the second plane portion 211a and a second fixed portion 213 provided around the second folded ring portion (212a, 212b).
  • a folding ring portion 115 and / or a second folding ring portion is a structure composed of one protrusion, or a first folding ring portion 115 and / or a second folding ring portion (212a, 212b) is formed by at least A wavy structure formed by a protrusion and at least one depression.
  • the first planar portion 111a and the second planar portion 211a are both configured as a flat sheet structure, so that the first diaphragm 11 and the second diaphragm (21a, 21b) occupy less space in the vertical direction. And, it can generate a sufficiently large amplitude. In this way, the sound generating device 21 provided in the present invention as a whole has a thin structure in the vertical direction, which is easier to apply in a flat installation space.
  • the first folding ring portion 115 and the second folding ring portion (212a, 212b) provide a certain compliance for the movement of the first flat portion 111a and the second flat portion 211a, that is, provide a certain flexibility, so that the first flat portion 111a
  • the second flat portion 211a is more easily pushed by the airflow passing through the avoidance holes (32a, 32b) and the side through holes 32c.
  • the present invention further provides a portable terminal 100, which includes a housing 110.
  • the housing 110 has an accommodating cavity therein.
  • the portable terminal 100 further includes a sound emitting device 210.
  • the sound generating device 210 is installed in the accommodating cavity.
  • the housing 110 is provided with a first sound hole 130 corresponding to the first diaphragm 11 and a second sound hole 140 corresponding to the second diaphragm (21a, 21b).
  • the first sound hole 130 is opened at a position of the casing 110 directly opposite the first diaphragm 11, and the second sound hole 140 is opened at the housing 110. Is directly opposite the second diaphragm (21a, 21b).
  • the housing 110 includes a front surface and a rear surface opposite to each other, the first sound hole 130 is provided on the front surface, and the second sound hole 140 is provided on the reverse surface.

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

Abstract

本发明公开一种发声器件及便携终端，发声器件包括第一振动系统、第二振动系统和磁路系统，所述第一振动系统包括第一振膜及设于所述第一振膜内侧的音圈，所述第一振膜包括第一中心部；所述第二振动系统包括与所述第一振膜相对设置的第二振膜，所述第二振膜包括第二中心部；所述磁路系统设于所述第一振膜及第二振膜之间，所述音圈收容于所述磁路系统的磁间隙中；所述磁路系统设有避让孔；所述第一中心部和第二中心部中的至少一个伸入所述避让孔以使第一中心部和第二中心部固定连接。本发明发声器件实现双向发声的结构占用的体积小，便于广泛应用于便携终端。

Description

发声器件及便携终端 技术领域
本发明涉及电声技术领域，特别涉及一种发声器件及便携终端。
背景技术
目前，扬声器作为具有音频播放功能的终端的重要部件，已得到广泛应用。一些终端，尤其是便携终端，如手机、平板电脑、耳机便能够为扬声器提供的安装空间非常有限，因此，现有的能够应用于狭小安装空间的扬声器，通常采用单个振膜正面发声的结构。为了实现双向发声，现有技术提供了一种采用两套音圈及磁路系统的扬声器，但这种扬声器通常体积较大，难以得到广泛应用。
发明内容
本发明的主要目的是提出一种发声器件，旨在解决现有的实现双向发声的发声器件因体积较大而难以广泛应用的技术问题。
为实现上述目的，本发明提出的发声器件，包括第一振动系统、第二振动系统及磁路系统，其中
所述第一振动系统包括第一振膜及设于所述第一振膜内侧的音圈，所述第一振膜包括第一中心部；
所述第二振动系统包括与所述第一振膜相对设置的第二振膜，所述第二振膜包括第二中心部；
所述磁路系统设于所述第一振膜及第二振膜之间，所述音圈收容于所述磁路系统的磁间隙中；所述磁路系统设有避让孔；所述第一中心部和第二中心部中的至少一个伸入所述避让孔以使第一中心部和第二中心部固定连接。
优选地，所述第一中心部包括：第一平面部和结合与所述第一平面部的第一补强部；
所述第二中心部包括：第二平面部和结合与所述第二平面部的第二补强 部；
所述第一中心部和第二中心部中的至少一个伸入所述避让孔以使第一中心部和第二中心部固定连接包括：
所述第一补强部和第二补强部中的至少一个伸入所述避让孔以使第一补强部和第二补强部固定连接。
优选地，所述磁路系统与所述第一振膜之间形成第一声腔，所述磁路系统与所述第二振膜之间形成第二声腔，所述避让孔连通所述第一声腔和第二声腔。
优选地，所述第一补强部包括伸入所述避让孔的第一凸部，所述第二补强部包括伸入所述避让孔的第二凸部，所述第一凸部和所述第二凸部在所述避让孔内固定连接。
优选地，所述第一凸部和所述第二凸部面接触固定连接。
优选地，所述第一凸部和所述第二凸部相向渐缩设置。
优选地，所述第一凸部和/或所述第二凸部的侧壁的纵截面形状为阶梯形、弧形或直线形。
优选地，所述第一凸部和/或所述第二凸部的横截面形状为矩形或圆形。
优选地，所述磁路系统包括导磁轭和设于所述导磁轭上的中心磁路部分与边磁路部分；所述中心磁路部分和边磁路部分之间形成容纳所述音圈的磁间隙；
所述中心磁路部分和所述边磁路部分中的至少一个设有永磁体；所述导磁轭的中部和中心磁路部分配合形成所述避让孔。
优选地，所述中心磁路部分包括设于所述导磁轭中部的中心磁钢和设于所述中心磁钢顶部的中心导磁板，所述导磁轭上开设有第一内孔，所述中心磁钢开设有第二内孔，所述中心导磁板上开设有第三内孔，所述第一内孔、第二内孔及所述第三内孔连通形成所述中心避让孔。
优选地，所述第一内孔的内壁面与所述中心磁钢的顶面围合形成第一台阶形凹部；和/或第三内孔的内壁面与所述中心磁钢的底面围合形成第二台阶形凹部。
优选地，所述边磁路部分包括自所述导磁轭的外周缘弯折形成的挡板；或，所述边磁路部分包括设于所述中心磁钢外围的若干边磁钢。
优选地，所述导磁轭的中部形成有开口，所述开口的边沿向第一振膜的方向弯折延伸形成翻边，所述翻边形成所述中心磁路部分，所述翻边围合形成所述避让孔；所述边磁路部分包括设于所述翻边外围的若干边磁钢，以及设于所述边磁钢顶部的边导磁板。
优选地，所述翻边设置多个，多个所述翻边沿所述开口的边沿间隔设置。
优选地，所述第一振膜还包括围绕第一中心部设置的第一折环部，以及围绕第一折环部设置的第一固定部；
所述第二振膜还包括围绕第二中心部设置的第二折环部，以及围绕第二折环部设置的第二固定部；
所述第一中心部和第二中心部均为平面片状结构，所述第一折环部和/或第二折环部为由一个凸起构成的结构，或，所述第一折环部和/或第二折环部为由至少一个凸起和至少一个凹陷构成的波浪形结构。
本发明还提出一种便携终端，包括壳体，所述壳体内部具有容置腔，该便携终端还包括如上所述的发声器件，所述发声器件安装在所述容置腔，所述壳体开设有对应所述第一振膜的第一声孔，以及对应所述第二振膜的第二声孔。
优选地，所述壳体包括相对设置的正面和反面，所述第一声孔设置在所述正面上，所述第二声孔设置在所述反面上。
本发明中发声器件的结构采用两套振动系统，但只采用一套音圈及磁路系统就可以实现双向发声，该结构占用的体积小，能够适应较为狭小的安装空间，便于广泛应用于便携终端。本发明的发声器件工作时，先由磁路系统直接驱动第一振动系统的第一振膜，由于第一声腔与第二声腔之间设有避让孔连通，第一中心部和第二中心部中至少有一者伸入避让孔内以固定连接，因此，第二振动系统的第二振膜同步振动发声，即第一振膜及第二振膜联动发声。应用于便携终端时，本发明的发声器件通过第一振动系统及第二振动系统可以分别向便携终端正反两个方向发声。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本发明发声器件一实施例的正面结构示意图；
图2为图1中发声器件的背面结构示意图；
图3为图1中发声器件的一剖面结构示意图，其中示意了磁路系统、第一振膜及第二振膜的第一实施例；
图4为图3中A处的局部放大图。
图5为图1中发声器件另一剖面结构示意图；
图6为图3所示发声器件中第一补强部和第二补强部的第一实施例的结构示意图；
图7为图6所示第一补强部和第二补强部第二实施例的结构示意图；
图8为图6所示第一补强部和第二补强部第三实施例的结构示意图；
图9为图6所示第一补强部和第二补强部第四实施例的结构示意图；
图10为图6所示第一补强部和第二补强部第五实施例的结构示意图；
图11为图3中发声器件的磁路系统一实施例的结构示意图；
图12为图11所示磁路系统的剖视图；
图13为图3中发声器件的磁路系统又一实施例的结构示意图；
图14为图13所示磁路系统的剖视图；
图15为图6所示第一补强部和第二补强部的剖视图；
图16为图10所示第一补强部和第二补强部的剖视图；
图17为图15所示第一补强部和第二补强部又一实施例的剖视图；
图18为图15所示第一补强部和第二补强部再一实施例的剖视图；
图19为图15所示第一补强部和第二补强部另一实施例的剖视图；
图20为图1所示扬声的器爆炸图；
图21为图1所示发声器件中第二振膜的一实施例的结构示意图；
图22为图1所示发声器件中第二振膜的又一实施例的结构示意图；
图23为本发明发声器件的磁路系统中的中心磁钢第一实施例的结构示意 图；
图24为本发明发声器件其磁路系统中的中心磁钢第二实施例的结构示意图；
图25为本发明发声器件其磁路系统中的中心磁钢第三实施例的结构示意图；
图26为为本发明发声器件其磁路系统中的中心磁钢第四实施例的结构示意图。
图27为本发明发声器件另一实施例的正面结构示意图；
图28为本发明发声器件另一实施例的背面结构示意图；
图29为图27所示发声器件的一剖视图；
图30为图27所示发声器件的爆炸图；
图31为图27所示发声器件中磁路系统的第一实施例的结构示意图；
图32为图27所示发声器件中磁路系统的第二实施例的结构示意图；
图33为图27所示发声器件中磁路系统的第三实施例的结构示意图；
图34为图27所示发声器件中磁路系统的第四实施例的结构示意图；
图35为本发明便携终端一实施例的正面结构示意图；
图36为图35中便携终端的背面结构示意图。
附图标号说明：
1：第一振动系统；11：第一振膜；111：第一中心部；111a：第一平面部；112,113,114：第一补强部；113a,113b,113c,113d,113e：第一凸部；115：第一折环部；117：第一固定部；12：音圈；
2：第二振动系统；21a，21b：第二振膜；211：第二中心部；211a：第二平面部；212a，212b：第二折环部；213：第二固定部；214,215,216：第二补强部；214a,214b,214c,214d,214e：第二凸部；
3a，3b：磁路系统；31：磁间隙；32a,32b：避让孔；32c：边通孔；33：气流通道；34a,34b：导磁轭；341：第一内孔；341a：第一台阶形凹部；343：挡板；341b：开口；343b,343c：翻边；35a，35b：中心磁钢；351a，351b，351c，351d：第二内孔；352b,352c：子磁钢；352d：切缝；36：中心导磁板；361：第三内孔；361a：第二台阶形凹部；37：边磁钢；38,38a：边导磁板；
5：第一声腔；6：第二声腔；7：外壳；8：前盖；9：后盖；100：便携终端；110：壳体；130：第一声孔；140：第二声孔；210：发声器件；
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，若本发明实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本发明实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
本发明提出一种发声器件210。
请参照图1至图5，在本发明实施例中，该发声器件210包括第一振动系统1、第二振动系统2及磁路系统3a，其中，所述第一振动系统1包括第一振膜11及设于所述第一振膜11内侧的音圈12，所述第一振膜11包括第一中心部111；
所述第二振动系统2包括与所述第一振膜11相对设置的第二振膜21a，所述第二振膜21a包括第二中心部211；
所述磁路系统3a设于所述第一振膜11及第二振膜21a之间，所述音圈12收容于所述磁路系统3a的磁间隙31中；磁路系统3a设有避让孔32a；所 述第一中心部111和第二中心部211中的至少一个伸入所述避让孔32a以使第一中心部111和第二中心部211固定连接。
在本实施例中，为了简化描述，将发声器件210的第一振膜11朝上放置时的位置为参考界定上下，即第一振膜11背向磁路系统3a的一侧为上，第一振膜11朝向磁路系统3a的一侧为下。
第一振动系统1可以参考现有的形式，具体的，音圈12与第一振膜11固定连接并伸入磁间隙31，音圈12连通变化的电流则受到不同大小的安培力而振动，音圈12振动带动第一振膜11振动，其能量变换方式是电能—机械能—声能。为了调整振动的频率特性，第一振动系统1还可包括配重块(未图示)。磁路系统3a的形式也可以参考现有的结构，中心磁钢35a的俯视形状既可以为圆形也可以为圆角矩形等。
为了方便安装第一振动系统1、第二振动系统2及位于两者之间的磁路系统3a，发声器件210还包括外壳7、前盖8及后盖9，外壳7用于收容第一振动系统1、第二振动系统2及磁路系统3a。前盖8及后盖9与外壳7配合形成保护框架，具体地，第一振膜11用于固定的边缘部由前盖8与外壳7夹持，第二振膜21a用于固定的边缘部由后盖9与外壳7夹持。前盖8对应第一振动系统1设置并设有供声音出射的前出声孔，后盖9对应第二振动系统2并设有供声音出射的后出声孔。
这样一来，在本发明中，发声器件210中第一振膜11的第一中心部111和第二振膜21a的第二中心部211中的至少一个插入至避让孔32a中，并且第一中心部111和第二中心部211固定连接，由于发声器件210中包含有磁路系统3a和音圈12，且音圈12与第一振膜11的连接，在向音圈12通入电流后，音圈12由于受到安培力的作用振动，进而推动第一振膜11振动，由于第一振膜11的第一中心部111与第二振膜21a的第二中心部211固定连接，因此，在第一振膜11振动时，其第一中心部111会带动第二振膜21a的第二中心部211振动，从而带动第二振膜21a振动，可以使第二振膜21a策动空气发声，实现双向发声。即为在本发明中，发声器件210的结构采用两套振动系统，但只采用一套音圈12及磁路系统3就可以实现双向发声，该结构占用的体积小，能够适应较为狭小的安装空间，便于广泛应用于便携终端100。同时，该结构中只需要通过第一振膜11和第二振膜21a本身就可以连接，省去了额外 的连接件，从而可以降低发声器件210的成本。
进一步的，上述第一中心部211包括第一平面部111a和结合与所述第一平面部111a的第一补强部113。
第二中心部包括：第二平面部211a和结合与所述第二平面部211a的第二补强部214。
此时，所述第一中心部111和第二中心部211中的至少一个伸入所述避让孔32a以使第一中心部111和第二中心部211固定连接包括：
所述第一补强部113和第二补强部214中的至少一个伸入所述避让孔32a以使第一补强部113和第二补强部214固定连接。
设置第一补强部113和第二补强部214可以增加第一振膜11和第二振膜21a的硬度，保证第一振膜11和第二振膜21a的高频性能。第一补强部113与第二补强部214之间的固定连接，可以是胶水粘接，或注塑一体成型连接。第一补强部113和第二补强部214中至少其中一个伸入避让孔32a以相互连接，故而第一补强部113和第二补强部214中的至少一个包含有形状为球顶状的结构。且，第一补强部和第二补强部214分别与避让孔32a的内壁面之间形成有用以连通第一声腔5及第二声腔6的气流通道33。为了保证被动辐射的第二振膜21a发声性能更优，第一补强部113和第二补强部214的材质包括但不限于Kapton(聚酰亚胺(PI)薄膜材料)、PEN(聚萘二甲酸乙二醇酯)、PI(聚酰亚胺)、LCP(Liquid Crystal Polymer液晶聚合物)、PC(聚碳酸酯)、PPA(Polyphthalamide聚邻苯二甲酰胺)等塑性材料，也可以是铝箔/镁铝合金/镁锂合金等金属材料，第一补强部113和第二补强部214的加工方式包含但不限于：吹塑、注塑、冲压及热压成型等。
需要说明的是，在本发明实施例中，第一补强部113和第二补强部214可以是单层结构，也可以是多层复合结构，本发明对此不做限制。
本发明的发声器件210工作时，先由磁路系统3a直接驱动第一振动系统1的第一振膜11，由于第一声腔5与第二声腔6之间设有避让孔32a连通，第一补强部113和第二补强部214中至少有一者伸入避让孔32a内以固定连接，因此，在第一振膜11振动发声时，第一补强部113带动第二补强部214振动，从而使得第二振膜21a振动，即为实现第一振动系统1的第一振膜11振动发声时，第二振动系统2的第二振膜21a同步振动发声，即第一振膜11及第二振膜21a联动发 声。
进一步的，所述磁路系统3a与所述第一振膜11之间形成第一声腔5，所述磁路系统3a与所述第二振膜21之间形成第二声腔6，所述避让孔32a连通所述第一声腔5和第二声腔6。这样一来，在第一振膜11与第二振膜21a联动发声的同时，由于第一声腔5与第二声腔6内的空气得以通过避让孔32a相互流通，两者的气压差较小，给第一振膜11与第二振膜21的振动造成的阻力也相对较小，从而可以实现更优的声学性能。应用于便携终端100时，本发明的发声器件210通过第一振动系统1及第二振动系统2可以分别向便携终端100正反两个方向发声。
请结合参照图3至5，为了便于批量加工，第一振膜11的第一补强部113和第二振膜21a的第二补强部214均设有伸入避让孔32a的部分。所述第一补强部113包括伸入所述避让孔32a的第一凸部113a，所述第二补强部214包括伸入所述避让孔32a的第二凸部214a，所述第一凸部113a和所述第二凸部214a在所述避让孔32a内固定连接。
在本实施例中，第一凸部113a由第一补强部113直接凸起形成，第一凸部113a的内部为中空的，该结构既能保证其传动时的结构强度，又能通过降低质量减少能量损耗，从而可以使得第一凸部113a传递的振动更加显著，提高发声器件的高频性能。第二凸部214a与第一凸部113a的结构相同，便于加工，提高生产效率。
请结合参照图6至图10，在不同的实施例中，第一补强部113和第二补强部214的形状为矩形，或者，第一补强部114和第二补强部215的形状为圆形。同时，第一凸部113a和第二凸部214a的横截面形状是矩形，或者，第一凸部(113b,113c)和第二凸部(214b,214c)的横截面形状是圆形，或者为上述两者的形状可以任意结合。
请参照图11至图14，对应的，避让孔32a的横截面形状也包括有圆形和矩形的实施例，可与第一凸部113a和第二凸部214a相匹配，从而使得第一凸部113a和第二凸部214a更好地容纳于其中，便于固定连接。
当第一凸部(113b,113c)和第二凸部(214b,214c)的横截面均为圆形时，避让孔32a的横截面为圆形；当第一凸部113a和第二凸部214a的横截面均为距 形时，避让孔32a的横截面也为矩形，且此处的矩形均为圆角矩形，从而使得气流在避让孔32a内的流动更加顺畅，不存在尖锐部位，提高发声器件210发声的圆滑度和用户使用的舒适度。
请继续参照图4和图5，所述第一凸部113a和所述第二凸部214a面接触固定连接。
本实施例中，第一凸部113a和第二凸部214a分别设于第一补强部113的中部和第二补强部214的中部，第一补强部113的外周缘与第一平面部111a连接，第二补强部214的外周缘与所述第二平面部211a连接。具体地，第一平面部111a和第二平面部211a均为平面片状结构，于两者的中部开设补强孔(未标示)，第一补强部113和第二补强部214的外周缘重叠结合于避让孔的周边缘，以提高第一振膜11和第二振膜21a各自的整体强度。
为了增加第一振膜11与第二振膜21a的连接强度，设置第一凸部113a与第二凸部214a面接触固定连接，即，第一凸部113a的底壁与第二凸部214a的底壁相连接，且，第一凸部113a的底壁和第二凸部214a的底壁具有一定的面积大小要求，面积越大粘接力越大，一体注塑成型或焊接同样如此。此时，第一凸部113a与第二凸部214a的纵截面形状设置为标准的U型、外扩状的U型或是近似U型，只需具备一平面状的底壁即可，保证后期粘接的牢固性。
同时，为了进一步增强第一补强部113和第二补强部214的结构强度，减小第一补强部113和第二补强部214的质量，第一凸部113a和第二凸部214a相向渐缩设置，即，第一凸部113a的横截面面积向第二振膜21a的方向上逐渐减小，第二凸部214a的横截面的面积向第一振膜11的方向上逐渐减小，该结构的设置可以使得第一补强部113和第二补强部214自身的结构强度增加，且可以使得第一凸部113a和第二凸部214a之间的连接强度也增加，以保证第二振膜21a的驱动力。此外，渐缩状的第一凸部113a和第二凸部214a还可以间接地扩宽气流通道33，从而增大了有效流通面积，如此，可以进一步地促进第一声腔5与第二声腔6之间的空气连通性。
当然，也可以设置第一凸部113a和第二凸部214a中的一个向另一个的方向上呈渐缩状，或者两者均不呈渐缩状，在此不作限定。
在上述的实施例基础上，所述第一凸部113a和/或所述第二凸部214a的 侧壁的纵截面形状为阶梯形、弧形或直线形。
请参照图15，第一凸部113a和第二凸部214a的侧壁的第一实施例中，其纵截面为阶梯形，即该第一凸部113a和第二凸部214a的侧壁呈多段弯折设置，该结构可以进一步提高第一凸部113a和第二凸部214a的自身强度，同时提高了第一补强部113和第二补强部214的连接强度，以便获取更好的发声效果。
第二实施例中，参照图16和图17，第一凸部(113c,113e)和/或所述第二凸部(214c,214e)的侧壁的纵截面形状为弧形，在该实施例中，弧形状的侧壁可以向避让孔32a的方向鼓起，也可以是向背离避让孔32a的方向凹陷，两种情况下的第一凸部(113c,113e)和第二凸部(214c,214e)均具有较高的结构强度，从而获得更好的连接强度。
此外第二实施例还可以结合第一实施例中的阶梯形进行设置，该结构为第三实施例，具体结构参照图18和图19，该实施例的第一凸部(113b,113d)和第二凸部(214b,214d)结合了两者的优点，可以进一步获取更高的结构强度，保证第一振膜11与第二振膜21a连接的稳定性。
需要说明的是，上述第一振膜11的第一中心部111和第二振膜21a的第二中心部211还可以是平面结构，即为第一振膜11的第一中心部111与第二振膜21a的第二中心部211是整体结构，当然还可以是其他结构，只要能使第一振膜与第二振膜在避让孔内固定连接即可，本发明对此不做限制。
进一步地，请参照图3至图5、图12至图20，所述磁路系统3a包括导磁轭34a和设于所述导磁轭34a上的中心磁路部分和边磁路部分(均未标示)；
所述中心磁路部分和边磁路部分之间形成容纳所述音圈12的磁间隙31；所述中心磁路部分和所述边磁路部分中的至少一个设有永磁体；
所述导磁轭34a的中部和中心磁路部分配合形成所述避让孔32a。
本实施例中，中心磁路部分可以包括中心磁钢35a，也可以是导磁轭34a的侧壁，边磁路部分可以是边磁钢37或是导磁轭34a的侧壁。中心磁路部分和所述边磁路部分中的至少一个设有永磁体，可以保证磁路部分的磁性稳定性，从而能够提供较为稳定的磁场，从而使得第一振膜11的振动较稳定，保证发声器件210发声的稳定性。由于与中心磁路部分对应的第一振膜11的中心部位振幅通常最大，通过于避让孔32a将第一振膜11的中心部位与第二振 膜21a的中心部位固定连接，可以使得第一振膜11推动第二振膜21a时更为省力。
磁路系统3a的第一实施例中，磁路系统3a的中心磁路部分包括设于导磁轭34a中部的中心磁钢35a和设于所述中心磁钢35a顶部的中心导磁板36，所述导磁轭34a上开设有第一内孔341，所述中心磁钢35a开设有第二内孔351a，所述中心导磁板36上开设有第三内孔361，第一内孔341、第二内孔351a及第三内孔361连通形成避让孔32a。
本实施例中，磁路系统3a的中心位置由下及上依次设有导磁轭34a、中心磁钢35a和中心导磁板36，导磁轭34a上开设有第一内孔341，中心磁钢35a开设有第二内孔351a，导磁板36上开设有第三内孔361，第一内孔341、第二内孔351a及第三内孔361连通形成中心避让孔32a，即，避让孔32a直接贯通导磁轭34a、中心磁钢35a及导磁板36，通过在避让孔32a内将第一中心部和第二中心部固定连接实现第一振膜11与第二振膜21a的联动，该形式简单，有利于促进第一声腔5与第二声腔6之间的气体流通。
请参照图12，所述边磁路部分的一实施例中，包括自所述导磁轭34a的外周缘弯折形成的挡板343，磁间隙31形成在中心磁钢35a与该挡板343之间。参照图21，当然，边磁路部分的另一实施例中，所述边磁路部分包括设于所述中心磁钢35a外围的若干边磁钢37时，磁间隙31则形成在中心磁钢35a与边磁钢37之间，磁路系统3a可以设置两个边磁钢37或四个边磁钢37。
请参照图22，当然，磁路系统3a在磁间隙31位置还设置边通孔32c。在本实施例中，通过设置边通孔32c，结合气流通道33则进一步地增加了第一声腔5与第二声腔6之间的连通性，进而第一振膜11振动时，单位时间内能有更多的空气在第一声腔5与第二声腔6之间的流动，第一声腔5与第二声腔6之间的气压更为均衡，造成的阻力更小。
进一步地，为了尽可能地增大流通面积，边通孔32c设置有多个，多个边通孔32c沿磁间隙31的周向间隔布置。如此，既可以保证连通的平衡性又能使磁路均衡连通。
具体地，边通孔32c开设在导磁轭34a上。由于导磁轭34a相较中心磁钢35a及导磁板36最为接近第二声腔6，因而，边通孔32c开设在导磁轭34a也最为方便。
下面介绍中心磁钢的优选形式：
优选地，请参照图23及图25，中心磁钢35b由一块磁钢组成，中心磁钢35b上设有连通第二内孔351c内壁面以及中心磁钢35b外周面的切缝352d。通过设置切缝352d可以方便地采用线切割的工艺加工第二内孔351c，具体地，可以先加工出切缝352d，然后再加工出第二内孔351c，相比直接钻制第二内孔351c更具实用性。如此，可降低加工难度，减少加工成本。
中心磁钢还可以包括相拼接的两子磁钢(352b,352c)，两子磁钢(352b,352c)的切缝352d与第二内孔(351b,351d)相接。如此，第二内孔(351b,351d)由两子磁钢(352b,352c)拼接形成，第二内孔(351b,351d)的内壁面实际上转化为各子磁钢(352b,352c)的外周面，即子磁钢(352b，352c)外周面上开放的槽壁面，如此能够为第二内孔(351b,351d)的加工方面带了方便。进一步地，为了便于装配并提升两子磁钢(352b,352c)的原材料的互换性，两子磁钢(352b,352c)关于一过第二内孔(351b,351d)中心的竖直平面对称或两子磁钢(352b,352c)关于第二内孔(351b,351d)的中心对称。具体地，在装配时，可以先将两子磁钢(352b,352c)未磁化前的坯料先拼接，然后再磁化，两子磁钢(352b,352c)的坯料可以互换，由此只需要提供一种形状尺寸的坯料即可。
请再次参照图5，第一振膜11、第二振膜(21a,21b)及中心磁钢(35a,35b)均为长条状，第一振膜11、第二振膜(21a,21b)及中心磁钢(35a,35b)的长轴位于同一竖直面内，避让孔32a沿中心磁钢(35a,35b)的长度方向延伸。可以理解的是，竖直面即平行于上下方向的平面，相应地发声器件210的外形也为长条形，这种结构在应用于便携终端100时空间利用率更高。同时，在相同面积的前提下，长条形的第一振膜11及第二振膜(21a,21b)更易于获得更大的振幅，对于第一振膜11而言可以更易驱动第二振膜(21a,21b)。第一凸部(113a,113b,113c,113d,113e)和第二凸部(214a,214b,214c,214d,214e)的横截面为长条形，且两者的横截面的长轴与避让孔32a的长轴位于同一竖直平面内，第一振膜11和第二振膜(21a,21b)的连接面积也会增大。
参照图12，所述第一内孔341的内壁面与所述中心磁钢35a的顶面围合形成第一台阶形凹部351a；和/或第三内孔361的内壁面与所述中心磁钢35a的底面围合形成第二台阶形凹部361a。
本实施例中，为了使第一振膜11和第二振膜21a的结构强度较高，可以设置所述第一凸部113a和所述第二凸部214a的侧壁的纵截面形状为阶梯形，且第一凸部113a和第二凸部214a以中心磁钢35a的横截面为镜面对称设置，为了能够更好地容纳第一凸部113a和第二凸部214a，对应地，第一内孔341的内壁面与所述中心磁钢35a的顶面围合形成第一台阶形凹部351a，第三内孔361的内壁面与所述中心磁钢35a的底面围合形成第二台阶形凹部361a，以此可以使第一凸部113a的侧壁与避让孔的内壁面之间的空间更大，为第一凸部113a和第二凸部214a的联动提供更大的空间，从而有更多的流通空间，第一声腔5与第二声腔6之间的气压更为均衡，造成的阻力进一步减小。
此外，设定第一凸部113a和第二凸部214a的阶梯状侧壁远离中心磁钢的一段为第一阶梯，该第一阶梯的高度不超过中心导磁板36的厚度和导磁轭34aa的厚度，从而使得第一凸部113a和第二凸部214a有更多的自由空间进行振动发声。
请参照图27至图30，磁路系统3b的第二实施例中，所述导磁轭34b的中部形成有开口341b，所述开口341b的边沿向第一振膜11的方向弯折延伸形成翻边343b，所述翻边343b形成所述中心磁路部分，所述翻边343b围合形成所述避让孔32b；所述边磁路部分包括设于所述翻边343b外围的若干边磁钢37，以及设于所述边磁钢37顶部的边导磁板38。
本实施例中，导磁轭34b的中部形成有开口341b，开口341b的边沿向第一振膜11的方向弯折延伸形成翻边343b，该翻边343b的横截面形状为矩形，与第一凸部113a和第二凸部214a的形状相匹配，用于容纳第一凸部113a和第二凸部214a。同时该翻边343b也形成了中心磁路部分，与翻边343b外围的若干边磁钢37之间形成磁间隙31，该结构简单，便于加工和实施，在形成避让孔32b的同时，也可以形成磁间隙31，进一步降低该发声器件210的重量。
请参照图31至图34，此处的翻边343b结构既可以是沿开口341b周缘连续设置的环状结构，也可以是设置有多个，多个翻边343c沿开口341b的边沿间隔设置，以进一步增大气流流通的空间，提高发声效果。
形成边磁路部分的边磁钢37可以设置两到四个，对应的，设于边磁钢37 顶部的边导磁板38可以对应设置两到四个；也可以在边磁钢37设置四个时，边导磁38a呈一环状结构覆盖于四个边磁钢37的顶部，该结构可以便于批量加工。
进一步地，请参照图3、图22和图23，第一振膜11还包括围绕第一平面部111a设置的第一折环部115以及围绕第一折环部115设置的第一固定部117；第二振膜(21a,21b)包括围绕第二平面部211a设置的第二折环部(212a,212b)和围绕第二折环部(212a,212b)设置的第二固定部213，第一折环部115和/或第二折环部(212a,212b)为由一个凸起构成的结构，或者第一折环部115和/或第二折环部(212a,212b)为由至少一个凸起和至少一个凹陷构成的波浪形结构。
在本实施例中，第一平面部111a和第二平面部211a均设置为平面片状结构，则第一振膜11和第二振膜(21a,21b)在上下方向上占用的空间较小，并且可以产生足够大的振幅，如此，本发明提供的发声器件21整体上形成上下方向较薄结构，更易于应用在扁状安装空间。第一折环部115和第二折环部(212a,212b)为第一平面部111a和第二平面部211a的运动提供一定的顺性，也就是提供一定的柔性，让第一平面部111a和第二平面部211a更易于被流经避让孔(32a,32b)以及边通孔32c的气流推动。
请参照图35和图36，本发明还提出一种便携终端100，包括壳体110，壳体110内部具有容置腔，该便携终端100还包括发声器件210，该发声器件210的具体结构参照上述实施例，由于本便携终端100采用了上述所有实施例的全部技术方案，因此至少具有上述实施例的技术方案所带来的所有有益效果，在此不再一一赘述。发声器件210安装在容置腔，壳体110开设有对应第一振膜11的第一声孔130，以及对应第二振膜(21a,21b)的第二声孔140。优选地，为了缩短壳体110内部声音的传播路径，减少声阻，第一声孔130开设于壳体110的与第一振膜11正对的位置，第二声孔140开设于壳体110的与第二振膜(21a,21b)正对的位置。
进一步的，壳体110包括相对设置的正面和反面，第一声孔130设置在正面上，第二声孔140设置在反面上。
以上所述仅为本发明的优选实施例，并非因此限制本发明的专利范围， 凡是在本发明的发明构思下，利用本发明说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本发明的专利保护范围内。

Claims (17)

  1. 一种发声器件，其特征在于，包括第一振动系统、第二振动系统及磁路系统，其中，
    所述第一振动系统包括第一振膜及设于所述第一振膜内侧的音圈，所述第一振膜包括第一中心部；
    所述第二振动系统包括与所述第一振膜相对设置的第二振膜，所述第二振膜包括第二中心部；
    所述磁路系统设于所述第一振膜及第二振膜之间，所述音圈收容于所述磁路系统的磁间隙中；所述磁路系统设有避让孔；所述第一中心部和第二中心部中的至少一个伸入所述避让孔以使第一中心部和第二中心部固定连接。
  2. 根据权利要求1所述的发声器件，其特征在于，所述第一中心部包括：第一平面部和结合与所述第一平面部的第一补强部；
    所述第二中心部包括：第二平面部和结合与所述第二平面部的第二补强部；
    所述第一中心部和第二中心部中的至少一个伸入所述避让孔以使第一中心部和第二中心部固定连接包括：
    所述第一补强部和第二补强部中的至少一个伸入所述避让孔以使第一补强部和第二补强部固定连接。
  3. 如权利要求1所述的发声器件，其特征在于，所述磁路系统与所述第一振膜之间形成第一声腔，所述磁路系统与所述第二振膜之间形成第二声腔，所述避让孔连通所述第一声腔和第二声腔。
  4. 如权利要求2所述的发声器件，其特征在于，所述第一补强部包括伸入所述避让孔的第一凸部，所述第二补强部包括伸入所述避让孔的第二凸部，所述第一凸部和所述第二凸部在所述避让孔内固定连接。
  5. 如权利要求4所述的发声器件，其特征在于，所述第一凸部和所述第 二凸部面接触固定连接。
  6. 如权利要求4或5所述的发声器件，其特征在于，所述第一凸部和所述第二凸部相向渐缩设置。
  7. 如权利要求6所述的发声器件，其特征在于，所述第一凸部和/或所述第二凸部的侧壁的纵截面形状为阶梯形、弧形或直线形。
  8. 如权利要求6所述的发声器件，其特征在于，所述第一凸部和/或所述第二凸部的横截面形状为矩形或圆形。
  9. 如权利要求1至5中任一项所述的发声器件，其特征在于，
    所述磁路系统包括导磁轭和设于所述导磁轭上的中心磁路部分与边磁路部分；所述中心磁路部分和边磁路部分之间形成容纳所述音圈的磁间隙；
    所述中心磁路部分和所述边磁路部分中的至少一个设有永磁体；所述导磁轭的中部和中心磁路部分配合形成所述避让孔。
  10. 如权利要求9所述的发声器件，其特征在于，所述中心磁路部分包括设于所述导磁轭中部的中心磁钢和设于所述中心磁钢顶部的中心导磁板，所述导磁轭上开设有第一内孔，所述中心磁钢开设有第二内孔，所述中心导磁板上开设有第三内孔，所述第一内孔、第二内孔及所述第三内孔连通形成所述避让孔。
  11. 如权利要求10所述的发声器件，其特征在于，所述第一内孔的内壁面与所述中心磁钢的顶面围合形成第一台阶形凹部；和/或第三内孔的内壁面与所述中心磁钢的底面围合形成第二台阶形凹部。
  12. 如权利要求9所述的发声器件，其特征在于，所述边磁路部分包括自所述导磁轭的外周缘弯折形成的挡板；或，所述边磁路部分包括设于所述中心磁钢外围的若干边磁钢。
  13. 如权利要求9所述的发声器件，其特征在于，所述导磁轭的中部形成有开口，所述开口的边沿向第一振膜的方向弯折延伸形成翻边，所述翻边形成所述中心磁路部分，所述翻边围合形成所述避让孔；所述边磁路部分包括设于所述翻边外围的若干边磁钢，以及设于所述边磁钢顶部的边导磁板。
  14. 如权利要求13所述的发声器件，其特征在于，所述翻边设置多个，多个所述翻边沿所述开口的边沿间隔设置。
  15. 如权利要求1至5中任一项所述的发声器件，其特征在于，
    所述第一振膜还包括围绕第一中心部设置的第一折环部，以及围绕第一折环部设置的第一固定部；
    所述第二振膜还包括围绕第二中心部设置的第二折环部，以及围绕第二折环部设置的第二固定部；
    所述第一中心部和第二中心部均为平面片状结构，所述第一折环部和/或第二折环部为由一个凸起构成的结构，或，所述第一折环部和/或第二折环部为由至少一个凸起和至少一个凹陷构成的波浪形结构。
  16. 一种便携终端，包括壳体，所述壳体内部具有容置腔，其特征在于，还包括如权利要求1-15所述发声器件，所述发声器件安装在所述容置腔，所述壳体开设有对应所述第一振膜的第一声孔，以及对应所述第二振膜的第二声孔。
  17. 根据权利要求16所述的便携终端，其特征在于，所述壳体包括相对设置的正面和反面，所述第一声孔设置在所述正面上，所述第二声孔设置在所述反面上。
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CN112104935A (zh) * 2020-09-29 2020-12-18 瑞声新能源发展(常州)有限公司科教城分公司 扬声器箱
WO2024027152A1 (zh) * 2022-08-02 2024-02-08 瑞声光电科技(常州)有限公司 扬声器

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