WO2020000984A1 - 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
WO2020000984A1
WO2020000984A1 PCT/CN2018/125583 CN2018125583W WO2020000984A1 WO 2020000984 A1 WO2020000984 A1 WO 2020000984A1 CN 2018125583 W CN2018125583 W CN 2018125583W WO 2020000984 A1 WO2020000984 A1 WO 2020000984A1
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WIPO (PCT)
Prior art keywords
diaphragm
magnetic
magnetic circuit
reinforcing
voice coil
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Application number
PCT/CN2018/125583
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English (en)
French (fr)
Inventor
王兴龙
赵国栋
蔡晓东
刘春发
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歌尔股份有限公司
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Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020000984A1 publication Critical patent/WO2020000984A1/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
    • H04R9/025—Magnetic circuit

Definitions

  • the invention relates to the technical field of electroacoustics, and in particular, to a sound generating device and a portable terminal.
  • 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, wherein the first vibration system includes a first diaphragm and a first diaphragm disposed on the first diaphragm. A voice coil facing one side of the magnetic circuit system; the second vibration system includes a second diaphragm opposite to the first diaphragm, and a reinforcing portion is combined at a middle position of the second diaphragm;
  • the magnetic circuit system is provided with a avoidance portion at a position corresponding to the voice coil, and the reinforcement portion is provided with an extension portion extending in a direction close to the voice coil; the extension portion may pass through the avoidance portion And fixed to the voice coil.
  • the second diaphragm includes a central portion located at an intermediate position, a folded ring portion located outside the central portion, and a fixed portion integrally provided with the folded ring portion;
  • the reinforcing portion includes a reinforcing portion body, and The reinforcing portion body fits the central portion, and the extension portion is formed by extending from an outer edge of the reinforcing portion body.
  • the reinforcing portion is coupled to a side of the central portion facing the magnetic circuit system, and the extension portion may be movably inserted into the avoidance portion and extended to be fixed to the voice coil;
  • the reinforcing portion is coupled to a side of the central portion facing away from the magnetic circuit system, and the second diaphragm is further provided with a mounting hole through which the extension portion passes, and the extension portion can move through. Placed in the avoidance portion and extended and fixed to the voice coil.
  • the reinforcing portion body and the extension portion are an integrated structure.
  • the reinforcement body is provided with a wavy stiffener structure composed of at least one protrusion and at least one depression.
  • the central portion is a flat sheet-like structure, the central portion is provided with a discharging hole, and the protrusion of the wavy stiffener structure is received at the discharging hole.
  • the second diaphragm is rectangular, and the rib structure is extended along the length direction of the second diaphragm.
  • the extending portion is provided with a reinforcing rib on at least one of two opposite side portions in the circumferential direction of the reinforcing portion body, and the reinforcing rib is fixedly connected to the reinforcing portion body.
  • an end of the extending portion near the first diaphragm is bent and extended to form a connecting groove, and the voice coil is connected to a groove wall of the connecting groove.
  • the extension portion includes a main body portion, a first fold portion, and a second fold portion extending upward from the reinforcing portion body; wherein,
  • the first folding portion is formed by folding outward from an upper edge of the main body portion, and the second folding portion is formed by folding upward from an edge of the first folding portion away from the main body portion;
  • the first turning portion and the second turning portion are enclosed to form the connection groove, and the second turning portion is located at the periphery of the voice coil.
  • the extending portion is provided with a reinforcing rib extending in the up-down direction.
  • the extending portion is outwardly formed to form the reinforcing rib.
  • a plurality of the extension portions are provided, and the plurality of extension portions are disposed symmetrically about the center of the voice coil.
  • the folded ring portion of the second diaphragm includes a plurality of folded ring structures, and the recessed directions of any adjacent two folded ring structures are opposite.
  • the magnetic circuit system further includes a central magnetic circuit portion and an edge magnetic circuit portion provided on the magnetic yoke; the central magnetic circuit portion includes a long central magnetic steel;
  • the side magnetic circuit part includes two side magnetic steels, the two side magnetic steels are respectively disposed on both sides of the center magnetic steel, and the magnetic gap is formed between the center magnetic steel and the two side magnetic steels;
  • Two extension portions are provided, and the two extension portions are respectively provided on the outer sides of the two ends of the central magnetic steel.
  • the magnetic yoke is a rectangular flat plate-like structure
  • the two edge magnetic steels are disposed on two long sides of the magnetic yoke
  • the avoidance portion is a short portion provided on the magnetic yoke. Side avoidance notches, and the extension portion is penetrated by the avoidance notches; or
  • the magnetic yoke is a rectangular flat plate-shaped structure, the two edge magnetic steels are disposed on both short sides of the magnetic yoke, and the avoidance portion is an avoidance provided on the long side of the magnetic yoke A notch, and the extension is penetrated by the avoidance notch.
  • the magnetic circuit system is arranged in a circular ring shape.
  • the magnetic circuit system is disposed 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 and the first A first acoustic cavity is formed between a diaphragm, and a second acoustic cavity is formed between the magnetic circuit system and the second diaphragm.
  • the present invention also provides a portable terminal, which includes a housing, the housing has an accommodation cavity inside, and further includes a sound emitting device as described above, the sound emitting device is installed in the accommodation cavity, and the housing is provided with a corresponding A first acoustic hole of the first diaphragm and a second acoustic hole corresponding to the second diaphragm.
  • the casing has 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 sound generating device of the present invention adopts two sets of vibration systems, but adopts only one voice coil and magnetic circuit system to realize two-way sound.
  • the structure occupies a small volume, which is convenient for wide application in portable terminals.
  • the voice coil is directly driven by the magnetic circuit system, and the first diaphragm of the first vibration system is driven to vibrate through the voice coil, so that the air of the first sound cavity is compressed or expanded to produce sound, and at the same time,
  • the connected reinforcement part is driven to further drive the second diaphragm to vibrate, so that the air of the second acoustic cavity is compressed or expanded to make a sound, and the second acoustic cavity is expanded or compressed in conjunction, thereby forming a voice coil to simultaneously drive the first diaphragm and the first diaphragm.
  • the two diaphragms vibrate and make two-way sound.
  • the first vibration system and the second vibration system are simultaneously connected by a voice coil to form a linkage system, which realizes the function of two-way radiation sound.
  • the sound emitting device of the present invention can simultaneously and simultaneously emit sound in two directions of the portable terminal through the first vibration system and the second vibration system.
  • 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 second diaphragm;
  • FIG. 4 is an enlarged schematic diagram of the right end of the structure in FIG. 3;
  • FIG. 5 is another schematic cross-sectional structure diagram of the sound generating device in FIG. 1, which illustrates a first embodiment of a second diaphragm;
  • FIG. 6 is an enlarged schematic diagram of the right end of the structure in FIG. 5, in which the first embodiment of the second diaphragm is replaced with the second embodiment of the second diaphragm;
  • FIG. 7 is a schematic diagram of an exploded structure of the sound generating device in FIG. 1, which illustrates a first embodiment of a magnetic circuit system
  • FIG. 8 is a schematic structural diagram of a connection between a back cover of the sound generating device and a second vibration system in FIG. 2;
  • FIG. 9 is a schematic structural front view of a connection between the back cover of the sound generating device and the second vibration system in FIG. 8; FIG.
  • FIG. 10 is a schematic front structural diagram of the first embodiment of the reinforcing portion in FIG. 9; FIG.
  • FIG. 11 is a schematic cross-sectional view of the reinforcing portion body in FIG. 10, which illustrates a first embodiment of the reinforcing portion body;
  • FIG. 12 is another schematic cross-sectional view of the reinforcing portion body in FIG. 10, wherein the first embodiment of the reinforcing portion body is replaced with the second embodiment of the reinforcing portion body;
  • FIG. 13 is another schematic cross-sectional view of the reinforcing portion body in FIG. 10, wherein the first embodiment of the reinforcing portion body is replaced with a third embodiment of the reinforcing portion body;
  • FIG. 14 is another schematic cross-sectional view of the reinforcing portion body in FIG. 10, wherein the first embodiment of the reinforcing portion body is replaced with a fourth embodiment of the reinforcing portion body;
  • FIG. 15 is a schematic structural diagram of a rear surface of the reinforcing portion body in FIG. 10; FIG.
  • FIG. 16 is a schematic front structural diagram of a second embodiment of the reinforcing portion in FIG. 1;
  • FIG. 17 is a schematic front view of the third embodiment of the reinforcing portion in FIG. 1; FIG.
  • FIG. 18 is a schematic front structural diagram of the magnetic circuit system in FIG. 1; FIG.
  • FIG. 19 is a schematic structural diagram of a back surface of the magnetic circuit system in FIG. 1;
  • FIG. 20 is a schematic structural diagram of a first embodiment of a voice coil of the sound generating device in FIG. 3;
  • 21 is a schematic front structural diagram of a fifth embodiment of a reinforcing part of a sound generating device according to the present invention.
  • FIG. 22 is a schematic diagram of a rear structure of a fifth embodiment of a reinforcing part of a sound generating device according to the present invention.
  • FIG. 23 is a schematic front structural diagram of an embodiment of a portable terminal according to the present invention.
  • FIG. 24 is a schematic structural diagram of the back of the portable terminal in FIG. 23; FIG.
  • FIG. 25 is a schematic view of a partial cross-sectional structure at B in FIG. 23.
  • fixed may be a fixed connection, a detachable connection, or an integral body; may It is a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction between two elements, unless it is clearly defined otherwise.
  • fixed may be a fixed connection, a detachable connection, or an integral body; may It is a mechanical connection or an electrical connection. It can be directly connected or indirectly connected through an intermediate medium. It can be the internal connection of two elements or the interaction between two elements, unless it is clearly defined otherwise.
  • specific meanings of the above terms in the present invention can be understood according to specific situations.
  • the present invention provides a sound generating device. Please refer to FIG. 1 to FIG. 3 and FIG. 18.
  • the sound generating device 210 includes a first vibration system 1, a second vibration system 2, and a magnetic circuit system. 3 of which
  • the first vibration system 1 includes a first vibration diaphragm 11 and a voice coil 12 provided on a side of the first vibration diaphragm 11 facing the magnetic circuit system 3;
  • the second vibration system 2 includes a second vibration diaphragm 2 opposite to the first vibration diaphragm 11.
  • the diaphragm (21a, 21b) and the second diaphragm (21a, 21b) include a central portion 211 and a reinforcing portion (214a, 214b);
  • the magnetic circuit system 3 is provided between the first diaphragm 11 and the second diaphragm (21a, 21b), and the voice coil 12 is housed in the magnetic gap 31 of the magnetic circuit system 3; A first acoustic cavity 4 is formed therebetween, and a second acoustic cavity 5 is formed between the magnetic circuit system 3 and the second diaphragm (21a, 21b);
  • the magnetic yoke 33 of the magnetic circuit system 3 is provided with a avoiding portion 331 at a position corresponding to the voice coil 12, and the reinforcing portion (214 a, 214 b) is provided with an extension portion 2142; the reinforcing portion (214 a, 214 b) is coupled to the central portion 211 On the side facing the first vibration system 1, the extending portion 2142 can be movably inserted into the avoiding portion 331 and extended to be fixed to the voice coil 12.
  • the position when the first diaphragm 11 of the sound generating 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 3 is up, and the first The side of a diaphragm 11 facing the magnetic circuit system 3 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 alternating current connected to the voice coil 12 is vibrated by 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.
  • the form of the magnetic circuit system 3 can also refer to the existing structure.
  • the magnetic gap 31 can be formed between the central magnetic steel 34 and the side magnetic steel 342, or the side walls of the central magnetic steel 34 and the magnetic yoke 33. between.
  • the shape of the center magnetic steel 34 in a plan view may be a circle, a rounded rectangle, or the like.
  • the sound generating device 210 further includes a housing 6, a front cover 7, and a rear cover 8, and the housing 6 is configured to receive the first vibration System 1, second vibration system 2 and magnetic circuit system 3.
  • the front cover 7 and the rear cover 8 cooperate with the housing 6 to form a protective frame.
  • the edge portion of the first diaphragm 11 for fixing is clamped by the front cover 7 and the housing 6, and the second diaphragm (21a, 21b)
  • the edge portion for fixing is clamped by the back cover 8 and the casing 6.
  • the front cover 7 is provided corresponding to the first vibration system 1 and is provided with a front sound hole 71 for emitting sound
  • the rear cover 8 is corresponding to the second vibration system 2 and is provided with a rear sound hole 81 for emitting sound.
  • the purpose of providing the reinforcing sections (214a, 214b) is mainly to increase the rigidity of the second diaphragm 21a, reduce the divisional vibration, and improve the high-frequency performance.
  • the reinforcing portion (214a, 214b) is made of a material with a higher specific modulus, for example, aluminum composite material, aluminum, aluminum-magnesium alloy, and magnesium-lithium alloy. , Carbon fiber, PEN (polyethylene naphthalate), LCP (Liquid Crystal Polymer), foam, etc.
  • Both the first diaphragm 11 and the second diaphragm (21a, 21b) can generate sounds in the range of human auditory sounds, for example, the frequency range is 20 to 20000HZ. In this way, the user can directly from the front and back directions of the sounding device. Receive audio messages. It can be understood that, in other embodiments, the first diaphragm 11 and the second diaphragm (21a, 21b) can also be used to generate sounds in other frequency ranges, such as the "sound code" corresponding to the human ear's hearing range. This sound can be decoded by the machine to achieve the corresponding signal transmission.
  • the reinforcing parts (214a, 214b) in this embodiment are located on the side of the second diaphragm (21a, 21b) facing the magnetic circuit system 3, so that the reinforcing parts
  • the extension portion 2142 of the portion (214a, 214b) only needs to pass through the avoidance portion 331 to be extended and fixed to the voice coil 12, which is convenient to install and can reduce the volume of the reinforcement portion (214a, 214b).
  • the reinforcing portion (214a, 214b) is coupled to the outside of the central portion 211, and the second diaphragm (21a, 21b) is provided with a mounting hole (not shown) through which the extension portion 2142 passes. (Illustrated), the extension portion 2142 can be movably inserted into the avoiding portion 331 to be extended and fixed to the voice coil 12.
  • the reinforcing portion (214a, 214b) is coupled to the outside of the central portion 211, and the extending portion 2142 of the reinforcing portion (214a, 214b) is sequentially passed through the mounting hole and the avoiding portion 331 to
  • the voice coil 12 can also drive two diaphragms, namely the first diaphragm 11 and the second diaphragm (21a, 21b), through the vibration of a voice coil 12 at the same time. the goal of.
  • the sound generating device 210 of the present invention adopts two sets of vibration systems, but uses only one set of voice coil 12 and magnetic circuit system 3 to achieve two-way sound.
  • the structure occupies a small volume, which is convenient for wide application in portable terminal 100.
  • the magnetic coil system 3 directly drives the voice coil 12 first, and the voice coil 12 drives the first diaphragm 11 of the first vibration system 1 to vibrate, so that the air in the first acoustic cavity 4 is compressed or expanded.
  • the reinforcement parts (214a, 214b) connected to the voice coil 12 are driven to further drive the second diaphragm (21a, 21b) to vibrate, so that the air of the second sound cavity 5 is compressed or expanded to make a sound, and the second sound cavity 5 linkage expansion or compression, thereby forming a voice coil 12 to simultaneously drive the first diaphragm 11 and the second diaphragm (21a, 21b) to vibrate and produce two-way synchronous sound, so that the first vibration system 1 and the second vibration system 2 are simultaneously
  • the voice coil 12 is connected to form a linkage system to realize the function of two-way radiation sound.
  • the sound generating device 210 of the present invention can synchronously emit sound in the forward and reverse directions of the portable terminal 100 through the first vibration system 1 and the second vibration system 2, respectively.
  • the reinforcing portion (214 a, 214 b) includes a reinforcing portion body (2141 a, 2141 b, 2141 c, 2141 d), and a reinforcing portion body (2141 a, 2141 b, 2141 c, 2141d) is attached to the inner side surface of the central portion 211 (that is, the side facing the first vibration system 1), and the extension portion 2142 is formed by extending from the outer edge of the reinforcing portion body (2141a, 2141b, 2141c, 2141d).
  • the extension portion 2142 is used to fixedly connect the voice coil 12 and is driven by the voice coil 12 when the voice coil 12 is operating and vibrates, and transmits the vibration to the second diaphragm (21a, 21b) to cause it to vibrate, and the second acoustic cavity
  • the air of 5 is compressed or expanded to make a sound
  • the extension portion 2142 is formed by extending from the outer edge of the reinforcement body (2141a, 2141b, 2141c, 2141d), which can reduce the installation interference of the extension portion 2142 to the magnetic circuit system 3, and arrange more. reasonable.
  • the extending portion 2142 is provided with a reinforcing rib extending in the vertical direction.
  • the reinforcing ribs formed at the extension portion 2142 can strengthen the structural strength of the extension portion 2142.
  • the extending portion 2142 is convexly formed outward to form a reinforcing rib.
  • the reinforcing ribs at the extension portion 2142 from interfering with the installation of internal components such as the magnetic circuit system 3.
  • a plurality of extension portions 2142 are provided, and the plurality of extension portions 2142 are symmetrically disposed with respect to the center of the voice coil 12, so that it is convenient for processing and forming the extension portion 2142 and also facilitates the reinforcement portion (214a , 214b) fixed installation.
  • the reinforcing portion body (2141a, 2141b, 2141c, 2141d) and the extension portion 2142 are an integrated structure.
  • the reinforcement body (2141a, 2141b, 2141c, 2141d) and the extension portion 2142 are integrally formed, and the process is simpler to implement. , And is conducive to mass production, which can save the process of setting a separate connector, and effectively reduce product costs.
  • the reinforcing portion (214a, 214b) can also have the reinforcing portion of the second vibration system 2
  • the function can also realize the function of fixedly connecting the second vibration system 2 and the voice coil 12, so that the second diaphragm (21a, 21b) of the second vibration system 2 can be driven by the voice coil 12 to vibrate and sound when it is working.
  • the reinforcing portion body (2141a, 2141b, 2141c, 2141d) is provided with a wave shape composed of at least one protrusion and at least one depression. Reinforcement part body (2141a, 2141b, 2141c, 2141d).
  • the body of the reinforcing portion (2141a, 2141b, 2141c, 2141d) has an inner side facing the magnetic circuit system and an outer side facing outward.
  • the reinforcing portion body 2141a has a wavy structure composed of a plurality of protrusions and a plurality of depressions, wherein the highest portion of the protrusion located on the inner side is lower than the reinforcing portion.
  • the inner side surface of the main body 2141a can reduce interference of the wave-shaped reinforcing portion main body 2141a on internal components such as the magnetic circuit system 3.
  • the reinforcing portion body 2141 b has a wavy structure composed of a plurality of protrusions and a plurality of depressions, wherein the highest position of the protrusion located on the inner side is higher than that of the reinforcement.
  • the inner surface of the strong body 2141a is higher than that of the reinforcement.
  • the reinforcing portion body 2141 c has a wavy structure composed of one protrusion and two depressions.
  • the reinforcing portion body 2141 d may be further provided with a reinforcing portion body formed by one protrusion.
  • the reinforcing portion 214a is coupled to the inner side of the central portion 211.
  • the central portion 211 is a flat sheet-like structure.
  • the protrusions of the strong body (2141a, 2141b, 2141c, 2141d) are located at the material removal hole 2111.
  • the second diaphragm (21a, 21b) further includes a folding ring portion (212a, 212b) provided around the central portion 211 and a fixing provided around the folding ring portion (212a, 212b). ⁇ 213.
  • the central portion 211 is provided with a blanking hole 2111 for giving way to the protrusions of the wave-shaped reinforcing portion body (2141a, 2141b, 2141c, 2141d) to avoid interference with its installation.
  • the central portion 211 is used to feel the dense and dense changes in the air in the second acoustic cavity 5 and to generate vibrations, that is, passive radiation.
  • the second diaphragms (21a, 21b) are up and down. The space taken up in the direction is small and can generate sufficiently large amplitudes.
  • the folding ring portions (212a, 212b) provide a certain compliance for the movement of the central portion 211, that is, a certain flexibility, so that the central portion 211 is more easily pushed and vibrates.
  • the folded ring portion 212 a has a structure composed of one protrusion.
  • the folded ring portion 212b is a wavy structure composed of at least one protrusion and at least one depression, that is, it includes a plurality of folded ring structures, and any adjacent two The direction of the depression of each folded ring structure is set to be opposite.
  • the central portion 211 is a flat sheet-like structure, and the central portion 211 is not provided with a hole and is not hollowed out.
  • the reinforcing portion body of the reinforcing portion 214b is not provided with a reinforcing rib, and the reinforcing portion body is connected to the central portion 211 in a close fit.
  • the reinforcing portion (214a, 214b) is coupled to the inner side of the central portion 211, and the extending portion 2142 is provided with a reinforcing rib on at least one of two opposite sides of the reinforcing portion body (2141a, 2141b, 2141c, 2141d) in the circumferential direction. 2148.
  • the reinforcing rib 2148 is fixedly connected to the reinforcing body (2141a, 2141b, 2141c, 2141d).
  • the reinforcing rib 2148 can play a role in strengthening the structural strength of the extension portion 2142.
  • the reinforcing rib 2148 may be provided in a straight plate-like structure or an arc-shaped structure.
  • two opposite sides of the extending portion 2142 on the reinforcing portion body (2141a, 2141b, 2141c, 2141d) in the circumferential direction are respectively provided with reinforcing ribs 2148. It can achieve a better effect of strengthening the structural strength of the extension 2142.
  • the extending portion 2142 is provided with a reinforcing rib 2148 on one of two opposite sides in the circumferential direction of the reinforcing portion body (2141a, 2141b, 2141c, 2141d).
  • an end of the extending portion 2142 near the first diaphragm 11 is bent and extended to form a connecting groove 2147, and the voice coil 12 is connected to a groove wall of the connecting groove 2147.
  • the connecting portion 2147 is formed by bending and extending the extending portion 2142, and the connecting slot 2147 is formed into a bowl-shaped structure.
  • glue can be placed in the groove wall of the connecting groove 2147, and the sound can be passed through the glue.
  • One end of the coil 12 is glued in the connecting groove 2147.
  • the bowl-shaped connecting groove 2147 can more effectively retain the adhesive glue, which is convenient for the installation between the extension 2142 and the voice coil 12. connection.
  • the extension portion 2142 includes a main body portion 2143, a first fold portion 2144, and a second fold portion 2145 extending upward from the self-reinforcing portion body (2141a, 2141b, 2141c, 2141d). ;among them,
  • the first folding portion 2144 is formed by folding outward from the upper edge of the main body portion 2143, and the second folding portion 2145 is formed by folding upward from the edge of the first folding portion 2144 away from the main body portion 2143;
  • the first fold-over portion 2144 and the second fold-over portion 2145 enclose a connecting groove 2147.
  • the second fold-over portion 2145 is located on the periphery of the voice coil 12.
  • the main body portion 2143, the first folded portion 2144, and the second folded portion 2145 can be formed by pressing.
  • the first folded portion 2144 is folded outward, and the second folded portion 2145 is folded upward.
  • the connecting groove 2147 formed by the first turning portion 2144 and the second turning portion 2145 facing inward, and the voice coil 12 is connected inside the connecting groove 2147, that is, the second turning portion 2145 is located on the periphery of the voice coil 12.
  • the second folding portion 2145 can prevent interference with the installation of the voice coil 12 or the magnetic circuit system 3, and the like.
  • the second diaphragms (21 a, 21 b) are rectangular, and the reinforcing body (2141 a, 2141 b, 2141 c, 2141 d) is extended along the length direction of the second diaphragms (21 a, 21 b).
  • the second diaphragm (21a, 21b) of the moment is easier to obtain a larger amplitude, and the body of the reinforcing portion (2141a, 2141b, 2141c, 2141d) is also arranged in a rectangle, which is arranged along the first
  • the two diaphragms (21a, 21b) are extended in the length direction to better fit the second diaphragm (21a, 21b).
  • the magnetic circuit system 3 further includes a central magnetic circuit portion and an edge magnetic circuit portion provided on the magnetic yoke 33; the central magnetic circuit portion includes a long bar
  • the central magnetic steel 34, the side magnetic circuit part includes two sides of the magnetic steel 342, the two sides of the magnetic steel 342 are respectively disposed on both sides of the center magnetic steel 34, and a magnetic gap 31 is formed between the center magnetic steel 34 and the two sides of the magnetic steel 342;
  • Two extension portions 2142 are provided, and the two extension portions 2142 are respectively provided on the outer sides corresponding to the two ends of the central magnetic steel 34.
  • the center magnetic steel 34 is provided at the bottom of the magnetic yoke 33, and the top of the center magnetic steel 34 is further provided with a magnetic conductive plate 35, the center magnetic steel 34 and the edge magnetic steel 342.
  • a magnetic gap 31 accommodating the voice coil 12 is formed therebetween; at least one of the central magnetic circuit portion and the side magnetic circuit portion is provided with a permanent magnet.
  • the magnetic circuit system may be configured as a single magnetic circuit system, or a three magnetic circuit system, or the like.
  • the first diaphragm 11, the second diaphragm (21a, 21b), and the central magnetic steel 34 are all elongated, and the first diaphragm 11 and the second diaphragm (21a) 21b) and the long axis of the central magnetic steel 34 are located in the same vertical plane.
  • the magnetic yoke 33 is a rectangular flat plate-like structure, and two side magnetic steels 342 are disposed on both long sides of the magnetic yoke 33 and extend.
  • the portion 2142 is penetrated by the avoidance portion 331 on the short side of the magnetic yoke 33 (in this embodiment, the avoidance portion 331 is an avoidance notch provided on the short side of the magnetic yoke 33); or,
  • the magnetic yoke 33 is a rectangular flat plate-like structure. Two side magnetic steels may also be provided on both short sides of the magnetic yoke 33.
  • the extension 2142 is provided by an escape portion located on the long side of the magnetic yoke 33.
  • the avoidance portion 331 may be an escape clearance provided on the long side of the yoke 33.
  • the magnetic circuit system is set in a circular ring shape. Accordingly, the first diaphragm And the second diaphragm is also set in a circular shape.
  • the vertical plane is a plane parallel to the up-down direction. Since the first diaphragm 11 and the second diaphragm (21a, 21b) are rectangular, the central magnetic steel 34 is also set to have an external shape.
  • the rectangular strip shape has a corresponding rectangular shape of the sound emitting device 210. Compared with a circular shape, this structure has higher space utilization efficiency when applied to the portable terminal 100.
  • the long first diaphragm 11 and the second diaphragm (21a, 21b) are easier to obtain larger amplitude.
  • the first diaphragm 11 includes a central portion, a folded ring portion provided around the central portion, and a fixed portion provided around the folded portion.
  • the central portion of the first diaphragm 11 is a planar sheet structure.
  • the space occupied by the first diaphragm 11 in the up-down direction is small, and a sufficiently large amplitude can be generated.
  • the sound generating device body provided by the present invention forms a thin structure in the up-down direction as a whole, so that it is easier to apply to a flat installation space.
  • the voice coil 12 may be designed into a circle as shown in FIG. 20 (for example, when it is applied to a circular sounding device) as shown in FIG. 20, or may be designed into a square, a track shape, an oval shape, or other shapes.
  • the present invention also proposes a portable terminal 100. Please refer to FIG. 23 to FIG. 25.
  • the portable terminal 100 includes a housing 110.
  • the housing 110 has a receiving cavity 120 therein.
  • the portable terminal 100 further includes a sound emitting device 210.
  • the sound generating device 210 is installed in the accommodating cavity 120.
  • 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 of the portable terminal 100 has opposite front and rear sides, wherein the first sound hole 130 is provided on the front side and the second sound hole 140 is provided on the reverse side, thereby realizing two-way synchronous sounding.

Abstract

本发明公开一种发声器件，包括第一振动系统、第二振动系统以及磁路系统，第一振动系统包括第一振膜及设于第一振膜的面向磁路系统一侧的音圈，第二振动系统包括与第一振膜相对设置的第二振膜，第二振膜的中间位置结合有补强部，磁路系统上对应音圈的部位设有避让部，补强部上设有向靠近音圈的方向延伸的延伸部，延伸部可穿过避让部并固定至音圈。本发明提供的发声器件设置两套振动系统，但只采用一套音圈及磁路系统以实现双向同步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，发声器件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、耳机能够为发声器件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发声器件，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发声器件，但这种发声器件通常体积较大，难以得到广泛应用。
发明内容
本发明的主要目的是提供一种发声器件，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、第二振动系统以及磁路系统，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的面向所述磁路系统一侧的音圈；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，所述第二振膜的中间位置结合有补强部；
所述磁路系统上对应所述音圈的部位设有避让部，所述补强部上设有向靠近所述音圈的方向延伸的延伸部；所述延伸部可穿过所述避让部并固定至所述音圈。
可选地，所述第二振膜包括位于中间位置的中心部、位于中心部外侧的折环部以及与折环部一体设置的固定部；所述补强部包括补强部本体，所述补强部本体贴合所述中心部，所述延伸部自所述补强部本体的外缘延伸形成。
可选地，所述补强部结合于所述中心部的面向所述磁路系统的一侧，所述延伸部可活动穿置在所述避让部内延伸固定至所述音圈；或
所述补强部结合于所述中心部的背离所述磁路系统的一侧，所述第二振膜上还设有供所述延伸部穿过的安装孔，所述延伸部可活动穿置在所述避让部内延伸固定至所述音圈。
可选地，所述补强部本体和所述延伸部为一体结构。
可选地，所述补强部本体设有由至少一个凸起和至少一个凹陷构成的波浪形加强筋结构。
可选地，所述中心部为平面片状结构，所述中心部开设有去料孔，所述波浪形加强筋结构的凸起容置于所述去料孔处。
可选地，所述第二振膜为矩形，所述加强筋结构沿所述第二振膜的长度方向延伸设置。
可选地，所述延伸部在所述补强部本体周向上的两相对侧部中至少一个设有加强肋，所述加强肋与所述补强部本体固定连接。
可选地，所述延伸部靠近所述第一振膜的一端弯折延伸形成连接槽，所述音圈连接于所述连接槽的槽壁。
可选地，所述延伸部包括自所述补强部本体向上延伸的主体部、第一翻折部及第二翻折部；其中，
所述第一翻折部自所述主体部的上边缘向外翻折形成，所述第二翻折部自所述第一翻折部远离所述主体部的边缘向上翻折形成；
所述第一翻折部与第二翻折部围合形成所述连接槽，所述第二翻折部位于所述音圈的外围。
可选地，所述延伸部上设有沿上下方向延伸的加强筋。
可选地，所述延伸部向外凸设形成所述加强筋。
可选地，所述延伸部设有多个，多个所述延伸部关于所述音圈的中心对称设置。
可选地，所述第二振膜的折环部包括多个折环结构，且任意相邻的两个折环结构的凹陷方向相反。
可选地，所述磁路系统还包括设于所述导磁轭上的中心磁路部分和边磁路部分；所述中心磁路部分包括长条状的中心磁钢；
所述边磁路部分包括两个边磁钢，两所述边磁钢分别设于所述中心磁钢的两侧，且所述中心磁钢和两边磁钢之间分别形成所述磁间隙；
所述延伸部设置有两个，两所述延伸部分别对应于所述中心磁钢的两端的外侧设置。
可选地，所述导磁轭为矩形的平板状结构，所述两个边磁钢设置于所述导磁轭的两长边侧，所述避让部为设置于所述导磁轭的短边侧的避让缺口，所述延伸部由所述避让缺口处穿出；或者，
所述导磁轭为矩形的平板状结构，所述两个边磁钢设置于所述导磁轭的两短边侧，所述避让部为设置于所述导磁轭的长边侧的避让缺口，所述延伸部由所述避让缺口处穿出。
可选地，所述磁路系统设置为圆环形。
可选地，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。
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，还包括如上所述发声器件，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。
可选地，所述壳体具有相对设置的正面和反面，所述第一声孔设置于正面，并且所述第二声孔设置于反面。
本发明发声器件通过采用设置两套振动系统，但只采用一套音圈及磁路系统以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。本发明的发声器件工作时，先由磁路系统直接驱动音圈，通过音圈带动第一振动系统的第一振膜振动，使得第一声腔的空气压缩或扩张而发声，同时，与音圈连接的补强部被带动，进一步带动第二振膜振动，使得第二声腔的空气压缩或扩张而发声，第二声腔联动扩张或压缩，由此形成一个音圈同时驱动第一振膜和第二振膜振动而双向发声，如此第一振动系统和第二振动系统同时被音圈连接形成一联动系统，实现双向辐射发声的功能。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同步发声。
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，其中示意了第二振膜的第一实施例；
图4为图3中结构的右端放大示意图；
图5为图1中发声器件的另一剖面结构示意图，其中示意了第二振膜的第一实施例；
图6为图5中结构的右端放大示意图，其中第二振膜的第一实施例被替换为第二振膜的第二实施例；
图7为图1中发声器件的爆炸结构示意图，其中示意了磁路系统的第一实施例；
图8为图2中发声器件的后盖和第二振动系统的连接背面结构示意图；
图9为图8中发声器件的后盖和第二振动系统的连接正面结构示意图；
图10为图9中补强部第一实施例的正面结构示意图；
图11为图10中补强部本体的一剖面示意图，其中示意了补强部本体的第一实施例；
图12为图10中补强部本体的另一剖面示意图，其中补强部本体的第一实施例被替换为补强部本体的第二实施例；
图13为图10中补强部本体的又一剖面示意图，其中补强部本体的第一实施例被替换为补强部本体的第三实施例；
图14为图10中补强部本体的再一剖面示意图，其中补强部本体的第一实施例被替换为补强部本体的第四实施例；
图15为图10中补强部本体的背面结构示意图；
图16为图1中补强部的第二实施例的正面结构示意图；
图17为图1中补强部的第三实施例的正面结构示意图；
图18为图1中磁路系统的正面结构示意图；
图19为图1中磁路系统的背面结构示意图；
图20为图3中发声器件的音圈第一实施例的结构示意图；
图21为本发明发声器件其补强部的第五实施例的正面结构示意图；
图22为本发明发声器件其补强部的第五实施例的背面结构示意图；
图23为本发明便携终端一实施例的正面结构示意图；
图24为图23中便携终端的背面结构示意图；
图25为图23中B处的局部剖面结构示意图。
附图标号说明：
Figure PCTCN2018125583-appb-000001
Figure PCTCN2018125583-appb-000002
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，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)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，在本发明中涉及“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。
在本发明中，除非另有明确的规定和限定，术语“连接”、“固定”等应做广义理解，例如，“固定”可以是固定连接，也可以是可拆卸连接，或成一体；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通或两个元件的相互作用关系，除非另有明确的限定。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本发明中的具体含义。
本发明提出一种发声器件，请参照图1至图3所示、图18所示，在一实施例中，该发声器件210，包括第一振动系统1、第二振动系统2以及磁路系 统3，其中，
第一振动系统1包括第一振膜11及设于第一振膜11的面向磁路系统3的一侧的音圈12；第二振动系统2包括与第一振膜11相对设置的第二振膜(21a，21b)，第二振膜(21a，21b)包括中心部211和补强部(214a，214b)；
磁路系统3设于第一振膜11及第二振膜(21a，21b)之间，音圈12收容于磁路系统3的磁间隙31中；磁路系统3与第一振膜11之间形成第一声腔4，磁路系统3与第二振膜(21a，21b)之间形成第二声腔5；
磁路系统3的导磁轭33对应音圈12的部位设有避让部331，补强部(214a，214b)上设有延伸部2142；补强部(214a，214b)结合于中心部211的面向第一振动系统1的一侧，延伸部2142可活动穿置在避让部331内延伸固定至音圈12。
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3的一侧为上，第一振膜11朝向磁路系统3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连通交变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。
磁路系统3的形式也可以参考现有的结构，例如磁间隙31既可以形成在中心磁钢34与边磁钢342之间，也可以形成中心磁钢34与导磁轭33的侧壁之间。中心磁钢34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3，发声器件210还包括外壳6、前盖7及后盖8，外壳6用于收容第一振动系统1、第二振动系统2及磁路系统3。前盖7及后盖8与外壳6配合形成保护框架，具体地，第一振膜11的用于固定的边缘部由前盖7与外壳6夹持，第二振膜(21a，21b)的用于固定的边缘部由后盖8与外壳6夹持。前盖7对应第一振动系统1设置并设有供声音出射的前出声孔71，后盖8对应第二振动系统2并设有供声音出射的后出声孔81。
本实施例中通过设置补强部(214a，214b)主要是为了增加第二振膜21a的刚性，降低分割振动，改善高频性能。优选地，为了保证被动辐射的第二 振膜21a发声性能更优，补强部(214a，214b)采用比模量高的材质，例如，铝复合材质，铝，铝镁合金，镁锂合金材质，碳纤维，PEN(聚萘二甲酸乙二醇酯)，LCP(Liquid Crystal Polymer液晶聚合物)，发泡体等。
第一振膜11及第二振膜(21a，21b)均可产生位于人的听觉响音范围声音，例如，频率范围在20～20000HZ，如此，用户可以从发声器件的正反两个方向直接接收声音信息。可以理解的是，在其他实施例中，第一振膜11及第二振膜(21a，21b)还可用于产生其他频率范围的声音，例如人耳听觉相应范围为的“声音密码”，这种声音可以被机器解码，以实现相应的信号传输。
为了便于补强部(214a，214b)的安装连接，本实施例中补强部(214a，214b)位于第二振膜(21a，21b)的面向磁路系统3的一侧，这样，补强部(214a，214b)的延伸部2142只需要穿过避让部331即可延伸固定至音圈12，安装方便且能够缩减补强部(214a，214b)的体积。
当然，在本发明的另一实施例中，补强部(214a，214b)结合于中心部211的外侧，第二振膜(21a，21b)设有供延伸部2142穿过的安装孔(未图示)，延伸部2142可活动穿置在避让部331内延伸固定至音圈12。这样设置，作为一种可实现的方式，补强部(214a，214b)结合在中心部211的外侧，补强部(214a，214b)的延伸部2142依次穿过安装孔和避让部331连接于音圈12，同样能够通过一个音圈12的振动同时带动两个振膜，即第一振膜11、第二振膜(21a，21b)的振动发声，以实现双向发声的结构占用的体积小的目的。
本发明发声器件210通过采用设置两套振动系统，但只采用一套音圈12及磁路系统3以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100。本发明的发声器件210工作时，先由磁路系统3直接驱动音圈12，通过音圈12带动第一振动系统1的第一振膜11振动，使得第一声腔4的空气压缩或扩张而发声，同时，与音圈12连接的补强部(214a，214b)被带动，进一步带动第二振膜(21a，21b)振动，使得第二声腔5的空气压缩或扩张而发声，第二声腔5联动扩张或压缩，由此形成一个音圈12同时驱动第一振膜11和第二振膜(21a，21b)振动而双向同步发声，如此第一振动系统1和第二振动系统2同时被音圈12连接形成一联动系统，实现双向辐射发声的功能。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正反两个方向同步发声。
进一步地，请参照图7、图9至图14所示，补强部(214a，214b)包括补强部本体(2141a，2141b，2141c，2141d)，补强部本体(2141a，2141b，2141c，2141d)贴合中心部211的内侧面(即面向第一震动系统1的一侧)，延伸部2142自补强部本体(2141a，2141b，2141c，2141d)的外缘延伸形成。
本实施例中，延伸部2142用以固定连接音圈12，并在音圈12工作振动时被音圈12带动，并传递振动至第二振膜(21a，21b)使其振动，第二声腔5的空气压缩或扩张而发声，延伸部2142自补强部本体(2141a，2141b，2141c，2141d)的外缘延伸形成，可减小延伸部2142对磁路系统3的安装干涉，排布更合理。
优选地，请参照图3、图4、以及图10所示，延伸部2142上设有沿上下方向延伸的加强筋。这样，延伸部2142处形成的加强筋可强化延伸部2142的结构强度。
优选地，请参照图3和4所示，延伸部2142向外凸设形成加强筋。如此设置，可避免延伸部2142处的加强筋对磁路系统3等内部部件安装造成干涉。
优选地，请参照图10所示，延伸部2142设有多个，多个延伸部2142关于音圈12的中心对称设置，这样，方便于延伸部2142的加工成型，也便于补强部(214a，214b)的安装固定。
优选地，补强部本体(2141a，2141b，2141c，2141d)和延伸部2142为一体结构。
如此设置，相比单独设置延伸部2142连接于补强部本体(2141a，2141b，2141c，2141d)，补强部本体(2141a，2141b，2141c，2141d)和延伸部2142一体成型，工艺实现较为简单，并有利于批量生产，可节省了另外设置单独的连接件的工序，有效降低产品成本，这样，还可使得补强部(214a，214b)既能具有第二振动系统2的补强部的功能，又能够实现将第二振动系统2和音圈12固定连接的功能，能够使得第二振动系统2的第二振膜(21a，21b)在工作时被音圈12驱动而振动发声。
进一步地，在本发明第一实施例中，请参照图10至图14所示，补强部本体(2141a，2141b，2141c，2141d)设有由至少一个凸起和至少一个凹陷构成的波浪形补强部本体(2141a，2141b，2141c，2141d)。
其中，定义补强部本体(2141a，2141b，2141c，2141d)具有一面向磁路系统的内侧面、以及朝外的外侧面。在本发明第一实施例中，如图11所示，补强部本体2141a具有多个凸起和多个凹陷构成的波浪形结构，其中，位于内侧的凸起的最高处低于补强部本体2141a的内侧面，这样，可减小波浪形补强部本体2141a对磁路系统3等内部部件造成干涉。
当然，在本发明第二实施例中，如图12所示，补强部本体2141b具有多个凸起和多个凹陷构成的波浪形结构，其中，位于内侧的凸起的最高处高于补强部本体2141a的内侧面。
在本发明第三实施例中，如图13所示，补强部本体2141c具有一个凸起和两个凹陷构成的波浪形结构。
当然，在本发明第四实施例中，如图14所示，补强部本体2141d还可设置为具有一个凸起形成的补强部本体。
进一步地，请参照图3、图5以及图7所示，补强部214a结合于中心部211的内侧，中心部211为平面片状结构，中心部211开设有去料孔2111，波浪形补强部本体(2141a，2141b，2141c，2141d)的凸起位于去料孔2111处。
具体地，如图4及图5所示，第二振膜(21a，21b)还包括围绕中心部211设置的折环部(212a，212b)以及围绕折环部(212a，212b)设置的固定部213。
在本申请中，中心部211开设有去料孔2111，以用于给波浪形补强部本体(2141a，2141b，2141c，2141d)的凸起让位，避免对其安装形成干涉。中心部211用以感受第二声腔5内空气的疏密变化并随之振动发声即被动辐射发声，通过将中心部211设置为平面片状结构，如此第二振膜(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。而折环部(212a，212b)为中心部211的运动提供一定的顺性，也就是提供一定的柔性，让中心部211更易于被推动而振动发声。
当然，在本发明第一实施例中，如图5所示，折环部212a为由一个凸起构成的结构。
而在本发明第二实施例中，如图6所示，折环部212b为由至少一个凸起和至少一个凹陷构成的波浪形结构，即包括多个折环结构，且任意相邻的两 个折环结构的凹陷方向被设置为相反。
作为另一种补强部214b的结构设计，在本发明的第五实施例中，如图21和图22所示，中心部211为平面片状结构，并且中心部211不设孔、非镂空，补强部214b的补强部本体不设加强筋，补强部本体与中心部211贴合连接。
进一步地，补强部(214a，214b)结合于中心部211的内侧，延伸部2142在补强部本体(2141a，2141b，2141c，2141d)周向上的两相对侧边中至少一个设有加强肋2148，加强肋2148与补强部本体(2141a，2141b，2141c，2141d)固定连接。
如此，加强肋2148能够起到加强延伸部2142结构强度的作用，当然，具体应用中，加强肋2148可设置呈直板状结构或者呈弧形结构等。
其中，在本发明第二实施例中，如图16所示，延伸部2142在补强部本体(2141a，2141b，2141c，2141d)周向上的两相对侧边分别设有加强肋2148，这样，能够达到更佳的加强延伸部2142结构强度的效果。
当然，在本发明第三实施例中，如图17所示，延伸部2142在补强部本体(2141a，2141b，2141c，2141d)周向上的两相对侧边中的一个设有加强肋2148。
进一步地，如图4所示，延伸部2142靠近第一振膜11的一端弯折延伸形成连接槽2147，音圈12连接于连接槽2147的槽壁。
本实施例中，通过将延伸部2142弯折延伸形成连接槽2147，并且连接槽2147形成为碗状结构，在安装时，可在连接槽2147的槽壁内放置胶水，并可通过胶水将音圈12的一端粘接在连接槽2147内，在与音圈12连接时，碗状的连接槽2147能够更加有效地存留粘接的胶水，这样，方便于延伸部2142和音圈12之间的安装连接。
进一步地，如图4和图10所示，延伸部2142包括自补强部本体(2141a，2141b，2141c，2141d)向上延伸的主体部2143、第一翻折部2144及第二翻折部2145；其中，
第一翻折部2144自主体部2143的上边缘向外翻折形成，第二翻折部2145自第一翻折部2144远离主体部2143的边缘向上翻折形成；
第一翻折部2144与第二翻折部2145围合形成连接槽2147，第二翻折部 2145位于音圈12的外围。
本实施例中，主体部2143、第一翻折部2144及第二翻折部2145可通过冲压成型，第一翻折部2144为向外翻折、第二翻折部2145向上翻折，这样，第一翻折部2144及第二翻折部2145围合形成的连接槽2147朝内，并且音圈12连接于连接槽2147内，也即，第二翻折部2145位于音圈12的外围，这样可避免第二翻折部2145对音圈12或者磁路系统3等的安装造成干涉。
请参照图7所示，第二振膜(21a，21b)为矩形，补强部本体(2141a，2141b，2141c，2141d)沿第二振膜(21a，21b)的长度方向延伸设置。
具体地，在相同面积的前提下，矩的第二振膜(21a，21b)更易于获得更大的振幅，补强部本体(2141a，2141b，2141c，2141d)也呈矩形设置，其沿第二振膜(21a，21b)的长度方向延伸设置，以更好地适配于第二振膜(21a，21b)。
进一步地，请参照图3、图5、图9及图10所示，磁路系统3还包括设于导磁轭33上的中心磁路部分和边磁路部分；中心磁路部分包括长条状的中心磁钢34，边磁路部分包括两边磁钢342，两边磁钢342分别设于中心磁钢34的两侧，且中心磁钢34和两边磁钢342之间分别形成磁间隙31；延伸部2142设置有两个，两延伸部2142分别对应于中心磁钢34的两端的外侧设置。
具体地，请参照图3和图5所示，中心磁钢34设于导磁轭33的底部，中心磁钢34的顶部还设置有导磁板35，中心磁钢34和边磁钢342之间形成容纳音圈12的磁间隙31；中心磁路部分和边磁路部分中的至少一个设有永磁体。当然，本申请中磁路系统可以设置为单磁路系统，也可以设置为三磁路系统等等。优选地，如图3和图7所示，第一振膜11、第二振膜(21a，21b)及中心磁钢34均为长条状，第一振膜11、第二振膜(21a，21b)及中心磁钢34的长轴位于同一竖直面内。
可选地，请参照图3、图5、图9及图10所示，导磁轭33为矩形的平板状结构，两个边磁钢342设置于导磁轭33的两长边侧，延伸部2142由位于导磁轭33的短边侧的避让部331处(在该实施例中，避让部331为设置在导磁轭33的短边侧的避让缺口)穿出；或者，
导磁轭33为矩形的平板状结构，两个边磁钢也可以设置于导磁轭33的两短边侧，延伸部2142由位于导磁轭33的长边侧的避让部处(同样地，避让部331可以为设置在导磁轭33的长边侧的避让缺口)穿出。
以上是以矩形的发声器件为例进行介绍，很容易理解的是，本技术方案也可以适用于圆形发声器件中，此时，磁路系统设置为圆环形，相应的，第一振膜与第二振膜也设置为圆环形。
在本实施例中，可以理解的是，竖直面即平行于上下方向的平面，由于第一振膜11、第二振膜(21a，21b)为矩形，中心磁钢34也设置为外形呈矩形的长条状，相应地发声器件210的外形也为矩形，相比圆形，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。
进一步地，第一振膜11包括中心部、围绕中心部设置的折环部以及围绕折环部设置的固定部，所述第一振膜11的中心部为平面片状结构。相似地，通过将第一振膜11中心部设置为平面片状结构，如此第一振膜11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。在结合第二振膜(21a，21b)的中心部也设置为片状结构的实施例后，本发明提供的发声器件体整体上形成上下方向较薄结构，如此，更易于应用在扁状安装空间。
进一步地，音圈12可根据需求设计成如图20所示的圆形(例如应用在圆形发声器件中时)，或者设计成方形、跑道形、椭圆形等其他形状。
本发明还提出一种便携终端100，请参照图23至图25所示，该便携终端100包括壳体110，壳体110内部具有容置腔120，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120，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。
进一步地，便携终端100的壳体110具有相对设置的正面和反面，其中， 第一声孔130设置于正面，并且第二声孔140设置于反面，由此实现双向的同步发声。
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 (20)

  1. 一种发声器件，其特征在于，包括第一振动系统、第二振动系统以及磁路系统，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的面向所述磁路系统一侧的音圈；
    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，所述第二振膜的中间位置结合有补强部；
    所述磁路系统上对应所述音圈的部位设有避让部，所述补强部上设有向靠近所述音圈的方向延伸的延伸部；所述延伸部可穿过所述避让部并固定至所述音圈。
  2. 如权利要求1所述的发声器件，其特征在于，所述第二振膜包括位于中间位置的中心部、位于中心部外侧的折环部以及与折环部一体设置的固定部；所述补强部包括补强部本体，所述补强部本体贴合所述中心部，所述延伸部自所述补强部本体的外缘延伸形成。
  3. 如权利要求2所述的发声器件，其特征在于，所述补强部结合于所述中心部的面向所述磁路系统的一侧，所述延伸部可活动穿置在所述避让部内延伸固定至所述音圈；或
    所述补强部结合于所述中心部的背离所述磁路系统的一侧，所述第二振膜上还设有供所述延伸部穿过的安装孔，所述延伸部可活动穿置在所述避让部内延伸固定至所述音圈。
  4. 如权利要求2所述的发声器件，其特征在于，所述补强部本体和所述延伸部为一体结构。
  5. 如权利要求2所述的发声器件，其特征在于，所述补强部本体设有由至少一个凸起和至少一个凹陷构成的波浪形加强筋结构。
  6. 如权利要求5所述的发声器件，其特征在于，所述中心部为平面片状结构，所述中心部开设有去料孔，所述波浪形加强筋结构的凸起容置于所述去料孔处。
  7. 如权利要求5所述的发声器件，其特征在于，所述第二振膜为矩形，所述加强筋结构沿所述第二振膜的长度方向延伸设置。
  8. 如权利要求2所述的发声器件，其特征在于，所述延伸部在所述补强部本体周向上的两相对侧部中至少一个设有加强肋，所述加强肋与所述补强部本体固定连接。
  9. 如权利要求2所述的发声器件，其特征在于，所述延伸部靠近所述第一振膜的一端弯折延伸形成连接槽，所述音圈连接于所述连接槽的槽壁。
  10. 如权利要求9所述的发声器件，其特征在于，
    所述延伸部包括自所述补强部本体向上延伸的主体部、第一翻折部及第二翻折部；其中，
    所述第一翻折部自所述主体部的上边缘向外翻折形成，所述第二翻折部自所述第一翻折部远离所述主体部的边缘向上翻折形成；
    所述第一翻折部与第二翻折部围合形成所述连接槽，所述第二翻折部位于所述音圈的外围。
  11. 如权利要求2所述的发声器件，其特征在于，所述延伸部上设有沿上下方向延伸的加强筋。
  12. 如权利要求11所述的发声器件，其特征在于，所述延伸部向外凸设形成所述加强筋。
  13. 如权利要求1至12任一项所述的发声器件，其特征在于，所述延伸部设有多个，多个所述延伸部关于所述音圈的中心对称设置。
  14. 如权利要求13所述的发声器件，其特征在于，所述第二振膜的折环部包括多个折环结构，且任意相邻的两个折环结构的凹陷方向相反。
  15. 如权利要求1至14任一项所述的发声器件，其特征在于，
    所述磁路系统还包括设于所述导磁轭上的中心磁路部分和边磁路部分；所述中心磁路部分包括长条状的中心磁钢；
    所述边磁路部分包括两个边磁钢，两所述边磁钢分别设于所述中心磁钢的两侧，且所述中心磁钢和两边磁钢之间分别形成所述磁间隙；
    所述延伸部设置有两个，两所述延伸部分别对应于所述中心磁钢的两端的外侧设置。
  16. 如权利要求15所述的发声器件，其特征在于，
    所述导磁轭为矩形的平板状结构，所述两个边磁钢设置于所述导磁轭的两长边侧，所述避让部为设置于所述导磁轭的短边侧的避让缺口，所述延伸部由所述避让缺口处穿出；或者，
    所述导磁轭为矩形的平板状结构，所述两个边磁钢设置于所述导磁轭的两短边侧，所述避让部为设置于所述导磁轭的长边侧的避让缺口，所述延伸部由所述避让缺口处穿出。
  17. 如权利要求15所述的发声器件，其特征在于，
    所述磁路系统设置为圆环形。
  18. 如权利要求1至14任一项所述的发声器件，其特征在于，
    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。
  19. 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至14任一项所述发声器件，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。
  20. 如权利要求19所述的便携终端，其特征在于，所述壳体具有相对设置的正面和反面，所述第一声孔设置于正面，并且所述第二声孔设置于反面。
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