WO2020087757A1 - 发声装置和耳机 - Google Patents

发声装置和耳机 Download PDF

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Publication number
WO2020087757A1
WO2020087757A1 PCT/CN2018/125707 CN2018125707W WO2020087757A1 WO 2020087757 A1 WO2020087757 A1 WO 2020087757A1 CN 2018125707 W CN2018125707 W CN 2018125707W WO 2020087757 A1 WO2020087757 A1 WO 2020087757A1
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WO
WIPO (PCT)
Prior art keywords
electrical connection
magnetic circuit
circuit system
diameter
voice coil
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/125707
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English (en)
French (fr)
Inventor
郭晓冬
侯燕燕
刘春发
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Goertek Inc
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Goertek Inc
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Filing date
Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Publication of WO2020087757A1 publication Critical patent/WO2020087757A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; 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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil

Definitions

  • the present invention relates to the technical field of electroacoustic transduction, and more specifically, to a sound emitting device.
  • the sound-generating device is an important electroacoustic transduction component in consumer electronic products, and it is widely used as a speaker, an earpiece, an earphone, and the like. As the performance of electronic products improves, the improvement of the acoustic performance of sound-generating devices is also an inevitable trend. In order to meet better acoustic performance, the sound-generating device often needs to be equipped with a magnetic circuit system with a larger size and a stronger magnetic field strength. In the sound-generating device, the size of the voice coil and the size of the magnetic circuit system are matched with each other. However, the internal space of the voice coil is large, and the utilization rate is low; when the amplitude of the voice coil is large, it is easy to produce risks such as polarization and broken wire of the voice coil.
  • An object of the present invention is to provide a new technical solution for a sounding device.
  • a sound emitting device comprising: a magnetic circuit system, a through hole is formed in the center of the magnetic circuit system;
  • a vibration assembly includes a diaphragm, a voice coil, and a centering support piece, the centering support piece includes a support portion, a fixing portion, and a connecting arm, the support portion surrounds the fixing portion, the connection The arm is connected between the fixed part and the support part, the diaphragm has a vibration zone, and a connection is formed between the voice coil, the vibration zone and the support part;
  • a supporting column passes through the through hole and is exposed from the upper end of the magnetic circuit system, and the fixing part is fixedly connected to the supporting column.
  • the top of the support column has two first electrical connection points, and a lead wire is drawn out from the voice coil, and the lead wire forms an electrical connection with the first electrical connection point.
  • a circuit trace extending from the support part to the fixed part through the connecting arm is formed in the centering support piece, and the lead wire is electrically connected to the circuit trace through the support part or the connecting arm, The first electrical connection point is electrically connected to the circuit trace through the fixing portion.
  • the bottom end of the support column has two second electrical connection points, the second electrical connection point is configured to form an electrical connection with an external device, and the two second electrical connection points pass through the An electrical connection is formed inside the support column with the first electrical connection point.
  • the vibration regions of the voice coil and the diaphragm are respectively connected to the two side surfaces of the support part.
  • the centering support piece includes four connection arms, and the four connection arms are paired with each other. Two pairs of the support arms are distributed axisymmetrically with respect to the central axis of the centering support piece. .
  • the fixing part is a first fixing part and a second fixing part, a pair of the connecting arms are connected to the first fixing part, and another pair of the connecting arms are connected to the second fixing part on.
  • the support column includes a plastic body portion with an inverted T shape on the side, the plastic body portion includes a core pillar and an assembly portion connected to the bottom of the core pillar, the core pillar passes through the passage of the magnetic circuit system Hole, the assembly part covers the bottom surface of the magnetic circuit system;
  • the support column further includes two metal parts injection-molded into the plastic body part, the metal part includes a parallel first end and a second end, and a middle connecting the first end and the second end The first end is exposed at the top surface of the stem to form a first electrical connection point, and the second end is exposed at the bottom surface of the support portion to form a second electrical connection point.
  • the diameter of the outer circumference of the magnetic circuit system is a first diameter D1
  • the diameter of the portion of the support column located in the through hole is a second diameter D2
  • the second diameter D2 is less than or equal to 0.32 Double the first diameter D1;
  • the diameter of the outer periphery of the magnetic circuit system is the first diameter D1
  • the diameter of the outer periphery of the sound emitting device is the third diameter D3
  • the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65.
  • the magnetic circuit system includes a yoke, and a plurality of flanges extending toward the periphery of the yoke are formed at the top edge of the yoke;
  • the sound emitting device further includes a bearing frame, a hollow is formed in the center of the bearing frame, and a positioning portion is formed on a lower end surface of the bearing frame;
  • the yoke is positioned at the hollow from the side of the lower end surface of the bearing frame, and the flange extends horizontally below the bearing frame and is fixedly connected to the positioning portion.
  • the positioning portion includes a positioning groove formed on a lower end surface of the bearing frame, the positioning groove extends to the hollow, and the flange is embedded in the positioning groove.
  • the bearing frame is a plastic material
  • the positioning portion includes a hot-melt structure formed on the lower end surface of the bearing frame
  • the hot melt structure is fixedly connected to the flange by hot melt.
  • the positioning portion further includes a positioning groove formed on the lower end surface of the carrying frame, the positioning groove extends to the hollow, and the hot-melt structure is located in the positioning groove, The flange is embedded in the positioning groove;
  • the shape of the cutout matches the shape of the yoke, the upper end of the yoke is embedded in the cutout, and the depth of the yoke embedded in the cutout is equivalent to the depth of the positioning groove.
  • the invention also provides an earphone, which is provided with the above sound generating device.
  • a technical effect of the present invention is to reduce the possibility that the voice coil is polarized in the sound-generating device and improve the acoustic performance of the sound-generating device.
  • FIG. 1 is a partial structural schematic diagram of a sound-generating device provided by a specific embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a centering support piece provided by a specific embodiment of the present invention.
  • FIG. 3 is a partial exploded view of a sound-generating device provided by a specific embodiment of the present invention.
  • FIG. 4 is a side cross-sectional view of a sound-generating device provided by a specific embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a voice coil provided by a specific embodiment of the present invention.
  • FIG. 6 is an exploded view of a part of a sound-generating device provided by a specific embodiment of the present invention.
  • FIG. 1 and 3 show a partial structural diagram and an exploded view of the sound-generating device of the present invention
  • FIG. 2 shows a schematic structural diagram of the centering support piece of the present invention
  • FIG. 4 shows the side of the sound-generating device of the present invention
  • FIG. 5 shows a schematic structural view of the voice coil of the present invention.
  • the invention provides a sound-generating device.
  • the sound-generating device includes: a magnetic circuit system, a vibrating component and a supporting column 30.
  • a through hole is formed in the center of the magnetic circuit system, and the through hole penetrates from the bottom end of the magnetic circuit system to the top of the magnetic circuit system.
  • a magnetic gap is formed in the magnetic circuit system, and a magnetic field is formed in the magnetic gap, which is used to drive the vibration component to vibrate.
  • the magnetic gap has a ring shape, which surrounds the periphery of the through hole.
  • the vibration assembly includes a diaphragm 21, a voice coil 22, and a centering support piece 23.
  • the centering support piece 23 includes a support portion 231, a fixing portion 232 and a connecting arm 233.
  • the support portion 231 surrounds the fixing portion 232.
  • the shape can be selected according to the shape of the sounding device and the voice coil, and the fixing portion can be similar to the shape of the supporting portion, or can be transformed into another shape.
  • the connecting arm 233 is connected between the fixing portion 232 and the supporting portion 231. The shape and number of the connecting arms are not limited in this embodiment.
  • the diaphragm 21 has a vibration zone, and the vibration zone is an area on the diaphragm 21 connected to the voice coil 22.
  • An electrical connection is formed between the voice coil 22, the vibration zone, and the support portion 231.
  • a voice signal can be passed into the voice coil 22, and the voice coil 22 can generate vibration under the action of the magnetic field of the magnetic circuit system.
  • the edge of the diaphragm 21 is fixed in the sound-generating device, the voice coil 22 is connected to the vibration zone, and the voice coil 22 is suspended in the magnetic gap formed by the magnetic circuit system.
  • the voice coil can drive the diaphragm to vibrate together when vibrating, so that the diaphragm vibrates to generate sound.
  • the support portion of the centering support piece is connected to the voice coil to ensure that the voice coil does not deviate from the center position when vibrating, and keeps the voice coil only reciprocating in the axial direction when it is stressed, to avoid the problem of polarization.
  • the support column 30 passes through the through hole and is exposed from the upper end of the magnetic circuit system. As shown in FIGS. 1-3, the top end of the support column 30 is exposed from the top of the magnetic circuit system, and the support portion 231 is fixed on the support column 30.
  • An electrical connection point may also be provided on the support column 30 to connect with the voice coil lead to form an electrical connection between the external device and the voice coil.
  • the sound-generating device provided by the present invention is different from the prior art, by changing the structure of the centering support piece, thereby changing the connection method of the centering support piece with the voice coil and the external circuit, so that the support portion and the voice coil around the centering support piece Connect to improve the utilization of the magnetic circuit system.
  • the supporting column and the component as the conduction signal are arranged in the through hole in the center of the magnetic circuit system, saving space. This arrangement helps to avoid the polarization of the voice coil in the sound-generating device, and can increase the output power of the sound-generating device under the condition that the overall volume of the sound-generating device remains unchanged to meet the requirements of acoustic performance.
  • the centering support piece 23 includes at least three connecting arms 233, and each connection arm 233 is distributed in a center-symmetrical manner with respect to the center of the centering support piece 23.
  • the voice coil 22 has two leads electrically connected to an external circuit, the positions of the two leads are symmetrical with respect to the center of the voice coil, so when the voice coil vibrates, the pulling force of the lead on the voice coil is symmetrical of.
  • Distributing at least three of the connecting arms in a center-symmetrical manner with respect to the center of the centering support piece can effectively improve the stability and balance of the connection arm of the centering support piece and reduce the risk of polarization of the voice coil Extending the life of the centering support piece helps to improve the sound quality of the sounding device.
  • the connecting arm 233 is bent and extended from the supporting portion 231 to the fixing portion 232. As shown in FIG. 2, the connecting arm 233 extends to the fixing portion 232 with a certain bend.
  • the bend is designed in an arc shape, avoiding the area where the stress is concentrated during bending, which can reduce the connecting arm The possibility of cracks under vibration increases the reliability of the centering piece.
  • the fixing part is a first fixing part and a second fixing part, a pair of the connecting arms are connected to the first fixing part, and another pair of the connecting arms are connected to the second fixing part on.
  • the first fixing portion and the second fixing portion are located at the center of the centering support piece with the same structure and same size.
  • the two fixing parts are arranged side by side and directly opposite to the top of the support column.
  • the top end of the support column 30 has a first electrical connection point 33, and the voice coil forms an electrical connection with the first electrical connection point 33.
  • the top end of the support post 30 is exposed from the top of the magnetic circuit system, and the support post 30 is used to introduce a sound signal to the voice coil 22.
  • the support post has an inverted T-shaped structure, the support post extends into the magnetic circuit system, and the end having the first electrical connection point is exposed from the top of the path system toward the fixing portion of the centering support piece.
  • a lead wire is drawn out from the voice coil. After the lead wire is drawn out from the voice coil, it extends to the top of the support column located in the central area of the voice coil in a bent and extended manner.
  • the number of the first electrical connection points 33 may be one or two, and the two first electrical connection points 33 are respectively located on the first fixing portion and the second fixing portion of the support column. In this way, the two leads can be in one-to-one correspondence with the first electrical connection point to form an electrical connection.
  • the voice coil is connected through the two leads and the corresponding first electrical connection point to form a signal loop.
  • the lead is extended in a V-shape, and designing the lead as a V-shape not only can make the lead have better deformability, and is not easy to break and damage, but also can restore the lead to its original shape after the voice coil stops shaking, reducing the lead The possibility of irreversible plastic deformation.
  • the present invention does not specifically limit the bending shape of the lead.
  • the lead may be designed to extend in an S shape or extend in another shape.
  • one end of the lead is fixedly connected to the first electrical connection point 33, and the other end is fixedly connected to the main body of the voice coil.
  • the bent extension leads have better deformability, and can deform with the vibration of the voice coil, reducing the possibility of the voice coil breaking due to vibration.
  • the lead wire can be deformed to form a buffer to avoid the excessive pulling force of the lead wire on the voice coil, reduce the impact of the pull force generated by the lead wire on the amplitude of the voice coil, improve the power conversion rate of the voice coil, and ensure the sound generating device The loudness of the sound output.
  • the bottom end of the support column 30 has two second electrical connection points 32.
  • the second electrical connection points 32 are configured to form an electrical connection with an external device, and the two second electrical connection points 32 are connected to the two first The electrical connection point 33 forms an electrical connection.
  • the sound-generating device provided by the present invention needs to be assembled into other electronic equipment, such as mobile phones, earphones, small speakers and other equipment. Therefore, the sound-generating device usually needs to receive the sound signal from other equipment and then convert the sound signal into sound.
  • the second electrical connection point 32 at the bottom end of the support column the sound signal on the external device can be introduced into the support column 30.
  • the sound signal can be transmitted to the lead wire via the second electrical connection point 32 and the first electrical connection point 33.
  • the second electrical connection point is formed at the bottom end of the support column, and the through hole penetrates the magnetic circuit system, so when the second electrical connection point is electrically connected to an external device, It is convenient to arrange the electrical connector from the bottom of the magnetic circuit system, and then to electrically connect with the second electrical connection. This design method is convenient for electrical connection, and is more compatible with the way the sound-emitting device is assembled to external equipment.
  • a circuit trace extending from the supporting portion 231 to the fixing portion 232 through the connecting arm 233 is formed in the centering support piece 23, and the voice coil 22 passes through the supporting portion 231 or the connecting arm 233 is electrically connected to the circuit trace, and the first electrical connection point 33 is electrically connected to the circuit trace through the fixing portion 232.
  • the support column serves as a conductive component for connecting the voice coil to the external circuit.
  • the support column is easier to form an electrical connection with the external electrical connector, which improves the reliability of the electrical connection; In the magnetic circuit system, it does not occupy other space inside the sounding device, which improves the space utilization of the sounding device.
  • two lead connection ends 221 are formed on both sides of the voice coil 22 close to the centering support portion 231, and the two lead connection ends 221 are oppositely disposed on the voice coil
  • the two ends of 22 form an electrical connection with the centering support piece 23, and the circuit traces on the centering support piece 23 can connect the voice coil 22 to the first electrical connection point 33 on the support column 30, so as to communicate with the external circuit .
  • the voice coil can form an electrical connection with the support column without a longer lead. Compared with the longer voice coil lead, the longer lead is reduced. When the voice coil is vibrated, the lead is inevitably caused by relative displacement and pulling The possibility of breakage.
  • the pulling force generated by the lead wire on the voice coil can be effectively avoided, the influence of the pulling force on the amplitude of the voice coil can be reduced, the power conversion rate of the voice coil can be improved, and the sound output loudness of the sound generating device can be guaranteed.
  • the vibration regions of the voice coil 22 and the diaphragm 21 are respectively connected to the two side surfaces of the support portion 231. Since the supporting portion 231 is located at the periphery of the centering support piece 23, the two sides of the supporting portion 231 are connected to the vibration regions of the voice coil 22 and the diaphragm 21, respectively, so that the size of the voice coil and the diaphragm can be increased, that is, the sound generating device can be expanded.
  • the size of the magnetic circuit system This helps to improve the utilization rate of the magnetic circuit system of the sounding device and the acoustic quality of the sounding device.
  • the centering supporting piece 23 includes four connecting arms 233.
  • the four connecting arms 233 are paired in pairs, and the two pairs of supporting arms 233 are distributed axisymmetrically with respect to the central axis of the centering support piece 23.
  • the paired support arms have better stability and balance, which can reduce the risk of polarization of the voice coil and help improve the sound quality of the sound-emitting device.
  • the support column may include a plastic body portion with an inverted T shape on the side.
  • the plastic body portion may include a stem and a fitting portion 31 connected to the bottom of the stem.
  • the core post passes through the through hole of the magnetic circuit system and is used to realize the above-mentioned electrical connection function.
  • the assembling part 31 is located on the bottom surface of the magnetic circuit system, and provides a supporting role for the magnetic circuit system.
  • the support column further includes two metal parts, and the two metal parts are injection-molded and fixed in the plastic body part.
  • the metal piece has a first end, a second end and an intermediate portion. The first end and the second end of the same metal piece are in a relatively parallel posture, and the intermediate portion is connected between the first end and the second end. As shown in FIG. 3, the first end is used to form the first electrical connection point 33, and the second end is used to form the second electrical connection point 32.
  • the first end portion may be exposed from the top surface of the plastic body portion, and the second end portion may be exposed from the bottom surface of the plastic body portion. This configuration is convenient for the leads and external devices to realize signal conduction through the metal parts.
  • the middle part of the metal part is injection-molded inside the plastic body part, and it is not easy to interfere with other conductive and magnetically conductive parts in the sound emitting device.
  • the diameter of the outer periphery of the magnetic circuit system is the first diameter D1
  • the diameter of the portion of the support column located in the through hole is the second diameter D2.
  • the second diameter D2 is less than or equal to 0.32 times the first diameter D1.
  • the part of the magnetic circuit system close to the magnetic gap is the part that contributes the most to the generation of electromagnetic force, and the position of the through hole is far from the magnetic gap. Therefore, opening a through hole in the center of the magnetic circuit system away from the magnetic gap and placing a support column can effectively avoid the impact of the structural loss of the magnetic circuit system on the generation of electromagnetic fields.
  • the support column has the second diameter D2 as small as possible within the process controllable range. In the range of D2 ⁇ 0.32 * D1, it can avoid substantial negative impact on the intensity of the generated electromagnetic field, and the sensitivity loss is below 0.2dB.
  • the diameter of the outer periphery of the sounding device is the third diameter D3.
  • the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65.
  • the invention electrically connects the voice coil to the outside by using a supporting column provided at the center of the magnetic circuit system, and no other electrical connection is needed at the periphery of the magnetic circuit system, thereby saving space at the periphery of the magnetic circuit system.
  • the size of the magnetic circuit system can be designed to be larger to improve the performance of the magnetic circuit system.
  • the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65.
  • the ratio of the first diameter D1 to the third diameter is 0.75.
  • the sound emitting device further includes a carrying frame 4.
  • the bearing frame 4 is used to provide support and positioning for the magnetic circuit system and other components of the sound-generating device, so that each component can be fixedly connected into a whole device.
  • a hollow 42 may be formed in the center of the bearing frame 4, and the magnetic circuit system is disposed at the hollow 42.
  • the magnetic circuit system may further include a yoke 11 having a bottom wall and an annular side wall extending from the bottom wall.
  • the yoke 11 encloses to form an accommodating space capable of carrying other components.
  • a plurality of flanges 111 extending toward the periphery of the side wall are formed on the top of the side wall.
  • the flange 111 is used to form a fixed connection with the bearing frame 4.
  • the yoke and the flange 111 are integrally formed by stamping.
  • the one-piece stamping structure has high reliability and is easier to assemble.
  • the yoke and the flange can also be fixedly connected together by other methods well known in the art, and the present invention does not limit this.
  • a positioning portion is formed on the lower end surface of the carrying frame 4.
  • the yoke 11 is disposed at the hollow 42 from one side of the lower end surface of the carrying frame 4.
  • the flange 111 corresponds to the position of the positioning portion.
  • the flange 111 extends to the bottom of the carrying frame 4 in the horizontal direction, and the two form a fixed connection, so that the magnetic circuit system and the carrying frame 4 are fixedly connected .
  • the positioning portion includes a positioning groove 41 formed on the lower end surface of the carrying frame 4, and the positioning groove 41 is recessed upward from the lower end surface of the carrying frame 4 distance. Moreover, the positioning groove extends along the surface of the lower end surface and extends to the hollow 42. That is, it extends to the edge of the hollow 42.
  • the bearing frame 4 is made of plastic material
  • the positioning portion includes a hot-melt structure 43 formed on the lower end surface of the bearing frame 4.
  • the flange 111 is at a position corresponding to the hot-melt structure 43, and the flange 111 may be in contact with the hot-melt structure 43.
  • the hot-melt structure 43 undergoes hot-melt treatment, and the hot-melt structure covers the flange 111 to form a fixed connection with the flange 111.
  • the flange 111 and the hot-melt structure 43 achieve a reliable fixed connection by means of hot-melt connection to ensure the structural reliability of the sound-emitting device.
  • the positioning portion may include the hot-melt structure 43 and the above-mentioned positioning groove 41.
  • the hot-melt structure 43 is located in the positioning groove 41
  • the flange 111 is embedded in the positioning groove 41, and is fixedly connected to the hot-melt structure 43 in the positioning groove 41 by heat fusion.
  • the cooperation between the positioning groove 41 and the flange 111 can improve the positioning accuracy of the bearing frame 4 and the magnetic circuit system.
  • the hot-melt structure 43 when the hot-melt structure 43 is subjected to hot-melt treatment, the hot-melt structure 43 may flow into the positioning groove 41 and be wrapped around the flange 111, thereby improving the carrying frame 4 and the yoke The reliability of the fixed connection between. Further, by containing the hot melt structure in the positioning groove, at least a part of the hot melt structure can be prevented from flowing to a position away from the flange after being melted, and defects such as appearance defects of the product caused by the hot melt structure flowing can be prevented.
  • the shape of the hollow 42 matches the shape of the magnetic circuit system and the yoke 11 so that the yoke 11 can form a good butt or seal connection with the carrier frame 4.
  • the entire magnetic circuit system may have a cylindrical structure.
  • the hollow 42 on the carrying frame 4 is circular, so that the magnetic circuit system is docked at the hollow 42.
  • the flange 111 will be embedded into the positioning groove 41 by a distance equivalent to the depth of the positioning groove 41, The end of the side wall of the yoke 11 will be closer to the hollow 42. If the flange 111 itself is flush with the top of the side wall of the yoke 11 or slightly lower than the top of the side wall of the yoke 11, the top of the side wall of the yoke 11 will be embedded in 42 hollows. In this embodiment, the positioning accuracy and sealing between the yoke and the carrier frame 4 can be improved.
  • the technical feature of using the flange to cooperate with the lower end surface of the load-bearing frame is adopted in the present invention, and the plastic shell structure encapsulating the yoke on the load-bearing frame is eliminated, even if the top of the side wall of the yoke Embedding a small distance in the hollow will not cause too much overlap between the bearing frame and the yoke and occupy too much space.
  • the flange itself is flush with the top of the side wall of the yoke, and the depth of the yoke embedded in the hollow is equivalent to the depth of the positioning groove.
  • the depth of the positioning groove can be flexibly selected according to actual needs, as long as the structural strength of the bearing frame is not damaged That's it.
  • the present invention does not strictly limit this.
  • the depth of the positioning groove can also be designed according to the actual structural strength of the bearing frame and the actual thickness of the flange.
  • the thickness of the flange is less than or equal to the depth of the positioning groove.
  • the matching relationship between the thickness of the flange and the depth of the positioning groove will affect the connection strength between the bearing frame and the yoke.
  • the lower surface of the flange can sink into the positioning groove, or be flush with the lower end surface of the bearing frame, this design can make the flange buried in the positioning groove To improve connection reliability.
  • the invention does not limit that the thickness of the flange must be less than or equal to the depth of the positioning groove.
  • the invention also provides an earphone product, the earphone is equipped with the sound generating device.
  • the sound-generating device designed by the present invention can make more effective use of space, and configure a larger magnetic circuit system and / or voice coil to enhance the acoustic performance of the sound-generating device, thereby meeting the performance of the earphone Claim.
  • the earphone may be an in-ear earphone or a semi-in-ear earphone.

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

Abstract

本发明公开了一种发声装置和耳机。该发声装置包括：磁路系统，所述磁路系统的中心形成有通孔；振动组件，所述振动组件包括振膜、音圈和定心支片，所述定心支片包括支撑部、固定部以及连接臂，所述支撑部环绕在所述固定部周围，所述连接臂连接在所述固定部与支撑部之间，所述振膜中具有振动区，所述音圈、振动区以及支撑部之间形成连接；支撑柱，所述支撑柱穿过所述通孔并从所述磁路系统的上端露出，所述支撑部固定连接在所述支撑柱上。本发明的一个技术效果是，提升了发声装置的声学性能。

Description

发声装置和耳机 技术领域
本发明涉及电声换能技术领域，更具体地，涉及一种发声装置。
背景技术
近年来，消费类电子产品的得到快速发展，智能手机、VR设备等电子设备得到消费者的认可，得到了广泛的应用。本领域技术人员对相关的配套产品如耳机等也相应进行了改进，以满足电子产品的性能要求，满足消费者对产品性能的需要。
发声装置是消费类电子产品中重要的电声换能部件，其作为扬声器、听筒、耳机等得到广泛的应用。随着电子产品的性能改进，有关发声装置的声学性能的改进也是必然的趋势。为了满足更好的声学性能，发声装置往往需要配置尺寸更大的、磁场强度更强的磁路系统。在发声装置中，音圈的尺寸与磁路系统的尺寸是相互匹配的。但是，音圈内部空间大，利用率低；音圈振幅较大时，易产生偏振、音圈引线断线等风险。
因此，有必要提出一种新型的发声装置，以克服上述缺陷。
发明内容
本发明的一个目的是提供一种发声装置的新技术方案。
根据本发明的第一方面，提供了一种发声装置，该发声装置包括：磁路系统，所述磁路系统的中心形成有通孔；
振动组件，所述振动组件包括振膜、音圈和定心支片，所述定心支片包括支撑部、固定部以及连接臂，所述支撑部环绕在所述固定部周围，所述连接臂连接在所述固定部与支撑部之间，所述振膜中具有振动区，所述音圈、振动区以及支撑部之间形成连接；
支撑柱，所述支撑柱穿过所述通孔并从所述磁路系统的上端露出，所 述固定部固定连接在所述支撑柱上。
可选地，所述支撑柱的顶端具有两个第一电连接点，所述音圈上引出有引线，所述引线与所述第一电连接点形成电连接。
可选地，所述定心支片中形成有从所述支撑部经连接臂延伸至固定部的电路走线，所述引线通过所述支撑部或连接臂与所述电路走线电连接，所述第一电连接点通过所述固定部与所述电路走线电连接。
可选地，所述支撑柱的底端具有两个第二电连接点，所述第二电连接点被配置为用于与外部设备形成电连接，两个所述第二电连接点经所述支撑柱内部与所述第一电连接点形成电连接。
可选地，所述音圈和振膜的振动区分别连接在所述支撑部的两侧表面上。
可选地，所述定心支片包括四支所述连接臂，四支所述连接臂两两成对，两对所述支撑臂相对于所述定心支片的中轴线呈轴对称分布。
可选地，所述固定部分为第一固定部和第二固定部，一对所述连接臂连接在所述第一固定部上，另一对所述连接臂连接在所述第二固定部上。
可选地，所述支撑柱包括侧面呈倒T型的塑料本体部，所述塑料本体部包括芯柱和连接于芯柱底部的装配部，所述芯柱穿过所述磁路系统的通孔，所述装配部覆于所述磁路系统的底面上；
所述支撑柱还包括注塑于所述塑料本体部中的两个金属件，所述金属件包括平行的第一端部和第二端部，以及连接第一端部和第二端部的中间部，所述第一端部露出所述芯柱的顶面形成第一电连接点，所述第二端部露出所述支撑部的底面形成第二电连接点。
可选地，所述磁路系统的外周的直径为第一直径D1，所述支撑柱的位于所述通孔中的部分的直径为第二直径D2，所述第二直径D2小于或等于0.32倍的第一直径D1；
所述磁路系统的外周的直径为第一直径D1，所述发声装置的外周的直径为第三直径D3，所述第一直径D1与第三直径D3的比值大于或等于0.65。
可选地，所述磁路系统包括磁轭，所述磁轭的顶部边缘处形成有向磁轭外围延伸的若干个凸缘；
所述发声装置还包括承载框架，所述承载框架的中心形成有镂空，所述承载框架的下端面上形成有定位部；
所述磁轭从所述承载框架的下端面一侧定位设置于所述镂空处，所述凸缘在水平方向上延伸至所述承载框架的下方与所述定位部固定连接。
可选地，所述定位部包括形成于所述承载框架的下端面上的定位凹槽，所述定位凹槽延伸至所述镂空处，所述凸缘嵌于所述定位凹槽中。
可选地，所述承载框架为塑料材料，所述定位部包括形成于所述承载框架的下端面上的热熔结构；
所述热熔结构与所述凸缘热熔固定连接。
可选地，所述定位部还包括形成于所述承载框架的下端面上的定位凹槽，所述定位凹槽延伸至所述镂空处，所述热熔结构位于所述定位凹槽中，所述凸缘嵌于所述定位凹槽中；
所述镂空的形状与所述磁轭的外形相匹配，所述磁轭的上端嵌于所述镂空中，所述磁轭嵌入所述镂空的深度相当于所述定位凹槽的深度。
本发明还提供了一种耳机，该耳机中设置有上述发声装置。
本发明的一个技术效果在于，降低了音圈在发声装置中产生偏振的可能性，提升了发声装置的声学性能。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
被结合在说明书中并构成说明书的一部分的附图示出了本发明的实施例，并且连同其说明一起用于解释本发明的原理。
图1是本发明具体实施方式提供的发声装置的局部结构示意图；
图2是本发明具体实施方式提供的定心支片的结构示意图；
图3是本发明具体实施方式提供的发声装置的局部的爆炸图；
图4是本发明具体实施方式提供的发声装置的侧面剖视图。
图5是本发明具体实施方式提供的音圈的结构示意图；
图6是本发明具体实施方式提供的发声装置的局部的爆炸图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
图1和图3示出了本发明中发声装置的局部的结构示意图和爆炸图，图2示出了本发明中定心支片的结构示意图，图4示出了本发明中发声装置的侧面剖视图，图5示出了本发明中音圈的结构示意图。现以图1至图5为例，对本发明的发声装置的结构、原理等进行详尽的描述。
本发明提供一种发声装置，该发声装置包括：磁路系统、振动组件以及支撑柱30。所述磁路系统的中心形成有通孔，所述通孔从磁路系统的底端贯通至所述磁路系统的顶部。所述磁路系统中形成有磁间隙，所述磁间隙中形成有磁场，其用于驱动振动组件振动。所述磁间隙呈环形，其环绕在所述通孔的外围。
所述振动组件包括振膜21、音圈22和定心支片23。如图1和图2所示，所述定心支片23包括支撑部231、固定部232以及连接臂233，所述支撑部231环绕在所述固定部232周围，对于支撑部和固定部的形状，可根据发声装置以及音圈的形状进行选择，固定部可以是与支撑部形状相仿，也可以变换为其他的形状。所述连接臂233连接在所述固定部232与支撑 部231之间，本实施例对连接臂的形状和数量不作限定。
其中，所述振膜21中具有振动区，振动区是振膜21上与音圈22连接的区域。所述音圈22、振动区以及支撑部231之间形成电连接。所述音圈22中可以通入声音信号，所述音圈22在磁路系统磁场的作用下能够产生振动。所述振膜21的边缘固定在所述发声装置中，所述音圈22连接在所述振动区上，音圈22悬与所述磁路系统形成的磁间隙中。音圈在产生振动时能够带动所述振膜一同振动，使振膜振动产生声音。本实施例中，定心支片的支撑部与音圈连接可以确保音圈在振动时不偏离中心位置，保持音圈在受力时，只沿轴向往复运动，避免发生偏振的问题。
进一步地，所述支撑柱30穿过所述通孔并从所述磁路系统的上端露出。如图1-3所示，所述支撑柱30的顶端从所述磁路系统的顶部露出，所述支撑部231固定在所述支撑柱30上。在所述支撑柱30上还可以设置电连接点，与音圈引线连接，将外部设备与音圈形成电连接。
本发明提供的发声装置，不同于现有技术，通过改变定心支片的结构，从而改变定心支片与音圈以及外部电路的连接方式，使定心支片外围的支撑部与音圈连接，以提升磁路系统的利用率。同时，支撑柱与作为导通信号的部件，设置在磁路系统的中心的通孔中，节省了空间。这种设置方式有助于避免音圈在发声装置中产生偏振，在发声装置整体体积不变的情况下还能提高发声装置的输出功率，以满足声学性能的要求。
可选地，所述定心支片23至少包括三支所述连接臂233，各个所述连接臂233相对于所述定心支片23的中心呈中心对称的形式分布。由于音圈22上具有两支与外部电路电连接的引线，这两支引线引出的位置相对于音圈中心呈中心对称，所以音圈在振动时，引线对音圈产生的拉扯作用力是对称的。而将至少三支所述连接臂相对于所述定心支片的中心呈中心对称的形式分布，能够有效提高定心支片连接臂的稳定性和平衡性，降低音圈产生偏振的风险，延长定心支片的寿命，有助于提高发声装置的声音质量。
具体的，所述连接臂233从所述支撑部231弯折延伸至所述固定部232上。如图2所示，所述连接臂233以一定的弯折延伸至所述固定部232上，该弯折呈圆弧形设计，避开了弯折时应力集中的区域，能够降低连接臂在 振动作用下产生裂纹的可能性，提高了定心支片的可靠性。
可选地，所述固定部分为第一固定部和第二固定部，一对所述连接臂连接在所述第一固定部上，另一对所述连接臂连接在所述第二固定部上。其中，第一固定部与第二固定部位于是结构、尺寸相同的分布在定心支片的中心。两个固定部并排设置，并与支撑柱的顶端正对。
在一种可能的实施方式中，所述支撑柱30的顶端具有第一电连接点33，所述音圈与所述第一电连接点33形成电连接。如图1和图2所示，所述支撑柱30的顶端从所述磁路系统的顶部露出，所述支撑柱30用于将声音信号引入所述音圈22上。本实施例中，支撑柱呈倒T型结构，支撑柱伸入磁路系统中，具有第一电连接点的一端从此路系统的顶端露出朝向所述定心支片的固定部。
具体地，所述音圈上引出有引线。所述引线从所述音圈上引出后，以弯折延伸的形式延伸到位于音圈的中心区域的支撑柱的顶端。其中，第一电连接点33的数量可以是一个或两个，两个第一电连接点33分别位于支撑柱的第一固定部和第二固定部上。这样，两支引线可以分别与第一电连接点一一对应的形成电连接。所述音圈通过两支所述引线以及对应连接的第一电连接点导通形成信号回路。
其中，所述引线呈V型延伸，将引线设计成V型既能够使引线具有更好的变形能力、不易折断损坏，又能够在音圈停止震动后使引线自身恢复到原始的形状，降低引线发生不可逆的塑性变形的可能性。本发明并不对所述引线的弯折形状进行具体限制，在其它实施方式中，也可以将所述引线设计成呈S型延伸或者呈其它形状延伸。
在实际应用中，所述引线的一端固定连接在所述第一电连接点33上，另一端与所述音圈的主体固定连接。在音圈产生振动时，引线的两端难免产生相对位移、振动。在这种情况下，弯折延伸的引线具有更好的变形能力，能够随着音圈的振动产生变形，降低音圈因振动而断裂的可能性。另一方面，引线可以通过变形形成缓冲，避免引线对音圈产生过大的拉扯作用力，降低其产生的拉扯作用力对音圈的振幅的影响，提高音圈的电能转化率，保证发声装置的声音输出响度。
进一步地，所述支撑柱30的底端具有两个第二电连接点32。如图4所示，所述第二电连接点32被配置为用于与外部设备形成电连接，两个所述第二电连接点32经所述支撑柱30内部与两个所述第一电连接点33形成电连接。在实际应用中，本发明提供的发声装置需要装配到其它电子设备中，例如装配到手机、耳机、小型扬声器等设备上。所以发声装置通常需要从其它设备上接收声音信号再将声音信号转化成声音。通过在所述支撑柱的底端设置第二电连接点32，能够将外部设备上的声音信号导入所述支撑柱30内。由于两个第二电连接点32分别与两个第一电连接点33形成电连接，所以声音信号能够经第二电连接点32、第一电连接点33传输至所述引线上。该实施方式的另一个优点在于，第二电连接点形成在支撑柱的底端，而所述通孔贯通所述磁路系统，因此在将第二电连接点与外部设备电连接时，能够方便的从磁路系统的底部配置电连接件，进而与第二电连接电连接。这种设计方式便于实现电连接，也与发声装置装配到外部设备上的方式契合度更高。
在另一种可能的实施方式中，所述定心支片23中形成有从所述支撑部231经连接臂233延伸至固定部232的电路走线，所述音圈22通过所述支撑部231或连接臂233与所述电路走线电连接，所述第一电连接点33通过所述固定部232与所述电路走线电连接。这样，支撑柱作为了连接音圈以外部电路的导通部件，相比于传统的连接方式，支撑柱更易于与外部电连接件形成电连接，提高了电连接的可靠性；支撑柱是设置在磁路系统中，不会占用发声装置内部的其他空间，提高了发声装置的空间利用率。
如图3和图5所示，在所述音圈22靠近所述定心支片支撑部231的两侧形成有两个引线连接端221，两个引线连接端221相对设置在所述音圈22的两端并与定心支片23形成电连接，定心支片23上的电路走线可将音圈22与支撑柱30上的第一电连接点33连接，从而与外部电路导通。这样，音圈无需较长的引线即可与支撑柱形成电连接，相比于较长的音圈引线，减少了较长的引线在音圈产生振动时，引线难免于产生相对位移、拉扯而出现断裂的可能性。采用这种实施方式，可以有效避免引线对音圈产生的拉扯作用力，降低拉扯作用力对音圈的振幅产生的影响，提高音圈的 电能转化率，保证发声装置的声音输出响度。
可选地，如图3所示，所述音圈22和振膜21的振动区分别连接在所述支撑部231的两侧表面上。由于支撑部231位于定心支片23的外围，将支撑部231两侧表面分别与音圈22和振膜21的振动区连接，可以增加音圈和振膜的尺寸，也即扩大发声装置中磁路系统的尺寸。这有助于提升发声装置磁路系统的利用率以及发声装置的声学品质。
优选地，所述定心支片23包括四支所述连接臂233。如图2所示，四支所述连接臂233两两成对，两对所述支撑臂233相对于所述定心支片23的中轴线呈轴对称分布。这种分布方式中，两两成对的支撑臂稳定性和平衡性更好，能够降低音圈产生偏振的风险，有助于提高发声装置的声音质量。
可选地，如图3、4所示，所述支撑柱可以包括侧面呈倒T型的塑料本体部。塑料本体部可以包括芯柱和连接于芯柱底部的装配部31。所述芯柱穿过磁路系统的通孔，用于实现上述电连接的功能。所述装配部31则位于所述磁路系统的底面上，对所述磁路系统提供支撑作用。
支撑柱上还包括两个金属件，两个所述金属件注塑固定在所述塑料本体部内。所述金属件上具有第一端部、第二端部和中间部。同一个金属件上的第一端部与第二端部呈相对平行的姿态，所述中间部连接在所述第一端部与第二端部之间。如图3所示，所述第一端部用于构成上述第一电连接点33，所述第二端部则用于构成所述第二电连接点32。所述第一端部可以从所述塑料本体部的顶面上露出，所述第二端部则从所述塑料本体部的底面上露出。这种配置方式便于引线以及外部设备通过所述金属件实现信号导通。而且，金属件的中间部注塑在塑料本体部内部，不易与发声装置内的其它导电、导磁部件发生相互干扰。
所述磁路系统的外周的直径为第一直径D1，支撑柱的位于所述通孔中的部分的直径为第二直径D2。优选地，所述第二直径D2小于或等于0.32倍的第一直径D1。所述磁路系统的靠近磁间隙的部分是对产生电磁作用力贡献最大的部分，所述通孔的位置远离所述磁间隙。因此，在磁路系统的远离磁间隙的中心部位开设通孔并放置支撑柱，能够有效避免磁路系统的 结构损失对产生电磁场造成的影响。优选地，支撑柱在工艺可控范围尽可能缩小第二直径D2。在D2≤0.32*D1的范围内能够避免对产生电磁场的强度造成实质性的负面影响,灵敏度损失在0.2dB以下。
发声装置的外周的直径为第三直径D3。在本发明的优选实施方式中，所述第一直径D1与第三直径D3的比值大于或等于0.65。在现有技术中，位于磁路系统外围的框架、壳体上注塑有用于电连接的焊盘的电路器件，占据了磁路系统外围的较大空间。在发声装置整体的空间有限的情况下，导致留给磁路系统自身的可用空间较小。本发明利用设置于磁路系统中心的支撑柱将音圈与外部电连接，磁路系统的外围无需再设置其它电连接，从而在磁路系统的外围节省了空间。相对于现有技术，可以将磁路系统的尺寸设计的更大，提高磁路系统的性能。优选地，所述第一直径D1与第三直径D3的比值大于或等于0.65。可选地，所述第一直径D1与第三直径的比值为0.75。
该发声装置还包括承载框架4。所述承载框架4用于为磁路系统以及发声装置的其它部件提供支撑、定位的作用，使各个部件可以固定连接成一个整体的装置。所述承载框架4的中心可以形成有镂空42，所述磁路系统设置在所述镂空42处。
如图3、4所示，所述磁路系统还可以包括磁轭11，所述磁轭11具有底壁和从所述底壁上延伸出的环形的侧壁。磁轭11围合形成了一个能够承载其它部件的容纳空间。在所述侧壁的顶部形成有向所述侧壁的外围延伸的若干个凸缘111。其中，所述凸缘111用于与所述承载框架4形成固定连接。可选地，所述磁轭与所述凸缘111为一体冲压成型的部件。一体冲压成型的结构可靠性高，而且更便于进行装配。当然，磁轭与凸缘之间还可采用本领域熟知的其它方式固定连接在一起，本发明对此不做限制。
如图6所示，所述承载框架4的下端面上形成有定位部。所述磁轭11从所述承载框架4的下端面的一侧设置于所述镂空42处。所述凸缘111与所述定位部的位置对应，凸缘111在水平方向上延伸至所述承载框架4的底部，两者形成固定连接，以使所述磁路系统与承载框架4固定连接。
如图6所示，优选地，所述定位部包括形成于所述承载框架4的下端 面上形成有定位凹槽41，所述定位凹槽41从所述承载框架4的下端面向上凹陷一段距离。并且，所述定位槽沿着所述下端面的表面延伸，一直延伸至所述镂空42处。即，延伸到镂空42的边缘。
可选地，所述承载框架4采用塑料材料制成，所述定位部包括形成于所述承载框架4的下端面上的热熔结构43。所述磁轭11与承载框架4装配在一起时，所述凸缘111处在与所述热熔结构43相对应的位置，凸缘111可以与热熔结构43接触。在所述发声装置的成品器件上，所述热熔结构43经过热熔处理，其热熔覆盖在所述凸缘111上，与所述凸缘111形成固定连接。凸缘111与热熔结构43通过热熔连接的方式实现可靠的固定连接，保证发声装置的结构可靠性。
如图6所示，优选地，所述定位部可以包括所述热熔结构43以及上述定位凹槽41。所述热熔结构43位于所述定位凹槽41中，所述凸缘111嵌于所述定位凹槽41中，并与定位凹槽41中的热熔结构43热熔固定连接。该优选实施方式中，一方面，定位凹槽41与凸缘111的配合方式能够提高承载框架4与磁路系统的定位准确性。另一方面，在对热熔结构43进行热熔处理时，所述热熔结构43可以流入所述定位凹槽41内，并包裹在所述凸缘111周围，从而提高承载框架4与磁轭之间的固定连接可靠性。进一步地，通过所述定位槽收容热熔结构，能够避免热熔结构的至少一部分结构热熔溶化后，流淌到远离凸缘的位置，防止由于热熔结构流淌导致的产品外形出现瑕疵等问题。
优选地，所述镂空42的形状与所述磁路系统、磁轭11的外形相匹配，以使磁轭11能够与承载框架4形成良好的对接或者密封连接。例如，所述磁路系统整体可以呈圆柱形结构。所述承载框架4上的镂空42则呈圆形，以便所述磁路系统对接在所述镂空42处。
进一步地，在所述承载框架4的下端面上形成有定位凹槽41的实施方式中，由于所述凸缘111会向定位凹槽41中嵌入相当于定位凹槽41深度的距离，所以，所述磁轭11的侧壁的端部会更靠近与所述镂空42处。如果所述凸缘111自身平齐于所述磁轭11的侧壁的顶部，或者略微低于所述磁轭11的侧壁的顶部，则所述磁轭11的侧壁的顶部会嵌于所述镂空42 处。在这种实施方式中，磁轭与承载框架4之间的定位准确性和密封性都能够得到提高。而且，由于本发明中采用凸缘与承载框架的下端面配合的技术特点，并且取消了承载框架上包封磁轭的塑胶外壳结构，因此，即使所述磁轭的侧壁的顶部向所述镂空处嵌入一小段距离，也不会造成承载框架与磁轭之间有过多的重叠部分、占用过多空间的情况。在本发明的设计中，仍然有足够的空间用于增大磁路系统的体积。可选地，所述凸缘自身平齐于所述磁轭的侧壁的顶部，所述磁轭嵌入到所述镂空处的深度相当于所述定位凹槽的深度。
由于承载框架本身采用金属材料制成，刚性较高，在其上设置定位凹槽时，所述定位凹槽的深度可以根据实际需要灵活选择，只要不会造成所述承载框架的结构强度受损即可。本发明并不对此进行严格限制，在实际应用中，还可以根据承载框架的实际结构强度以及凸缘的实际厚度对所述定位凹槽的深度进行设计。
优选地，所述凸缘的厚度小于或等于所述定位凹槽的深度。所述凸缘的厚度与所述定位凹槽的深度之间的配合关系会影响到承载框架与磁轭之间的连接强度。在这种优选的实施方式中，凸缘的下表面能够向定位凹槽内沉入，或者齐平于承载框架的下端面，这种设计方式可以使凸缘被埋入所述定位凹槽内，提高连接可靠性。本发明并不限制所述凸缘的厚度必须小于或等于所述定位凹槽的深度。
本发明还提供了一种耳机产品，该耳机中配置有上述发声装置。在耳机产品内有限的空间中，采用本发明设计的发声装置能够更有效的利用空间，配置体积更大的磁路系统和/或音圈，以增强发声装置的声学性能，进而满足耳机的性能要求。该耳机可以为入耳式耳机或半入耳式耳机。
虽然已经通过例子对本发明的一些特定实施例进行了详细说明，但是本领域的技术人员应该理解，以上例子仅是为了进行说明，而不是为了限制本发明的范围。本领域的技术人员应该理解，可在不脱离本发明的范围和精神的情况下，对以上实施例进行修改。本发明的范围由所附权利要求来限定。

Claims (14)

  1. 一种发声装置，其特征在于，包括：
    磁路系统，所述磁路系统的中心形成有通孔；
    振动组件，所述振动组件包括振膜、音圈和定心支片，所述定心支片包括支撑部、固定部以及连接臂，所述支撑部环绕在所述固定部周围，所述连接臂连接在所述固定部与支撑部之间，所述振膜中具有振动区，所述音圈、振动区以及支撑部之间形成连接；
    支撑柱，所述支撑柱穿过所述通孔并从所述磁路系统的上端露出，所述固定部固定连接在所述支撑柱上。
  2. 根据权利要求1所述的发声装置，其特征在于，所述支撑柱的顶端具有两个第一电连接点，所述音圈上引出有引线，所述引线与所述第一电连接点形成电连接。
  3. 根据权利要求2所述的发声装置，其特征在于，所述定心支片中形成有从所述支撑部经连接臂延伸至固定部的电路走线，所述引线通过所述支撑部或连接臂与所述电路走线电连接，所述第一电连接点通过所述固定部与所述电路走线电连接。
  4. 根据权利要求2所述的发声装置，其特征在于，所述支撑柱的底端具有两个第二电连接点，所述第二电连接点被配置为用于与外部设备形成电连接，两个所述第二电连接点经所述支撑柱内部分别与两个所述第一电连接点形成电连接。
  5. 根据权利要求1所述的发声装置，其特征在于，所述音圈和振膜的振动区分别连接在所述支撑部的两侧表面上。
  6. 根据权利要求3所述的发声装置，其特征在于，所述定心支片包括四支所述连接臂，四支所述连接臂两两成对，两对所述支撑臂相对于所述定心支片的中轴线呈轴对称分布。
  7. 根据权利要求3所述的发声装置，其特征在于，所述固定部分为第一固定部和第二固定部，一对所述连接臂连接在所述第一固定部上，另一对所述连接臂连接在所述第二固定部上。
  8. 根据权利要求4所述的发声装置，其特征在于，所述支撑柱包括侧面呈倒T型的塑料本体部，所述塑料本体部包括芯柱和连接于芯柱底部的装配部，所述芯柱穿过所述磁路系统的通孔，所述装配部覆于所述磁路系统的底面上；
    所述支撑柱还包括注塑于所述塑料本体部中的两个金属件，所述金属件包括平行的第一端部和第二端部，以及连接第一端部和第二端部的中间部，所述第一端部露出所述芯柱的顶面形成第一电连接点，所述第二端部露出所述支撑部的底面形成第二电连接点。
  9. 根据权利要求8所述的发声装置，其特征在于，所述磁路系统的外周的直径为第一直径D1，所述支撑柱的位于所述通孔中的部分的直径为第二直径D2，所述第二直径D2小于或等于0.32倍的第一直径D1；
    所述磁路系统的外周的直径为第一直径D1，所述发声装置的外周的直径为第三直径D3，所述第一直径D1与第三直径D3的比值大于或等于0.65。
  10. 根据权利要求8所述的发声装置，其特征在于，所述磁路系统包括磁轭，所述磁轭的顶部边缘处形成有向磁轭外围延伸的若干个凸缘；
    所述发声装置还包括承载框架，所述承载框架的中心形成有镂空，所述承载框架的下端面上形成有定位部；
    所述磁轭从所述承载框架的下端面一侧定位设置于所述镂空处，所述凸缘在水平方向上延伸至所述承载框架的下方与所述定位部固定连接。
  11. 根据权利要求10所述的发声装置，其特征在于，所述定位部包括形成于所述承载框架的下端面上的定位凹槽，所述定位凹槽延伸至所述镂空处，所述凸缘嵌于所述定位凹槽中。
  12. 根据权利要求10所述的发声装置，其特征在于，所述承载框架为塑料材料，所述定位部包括形成于所述承载框架的下端面上的热熔结构；
    所述热熔结构与所述凸缘热熔固定连接。
  13. 根据权利要求11所述的发声装置，其特征在于，所述定位部还包括形成于所述承载框架的下端面上的定位凹槽，所述定位凹槽延伸至所述镂空处，所述热熔结构位于所述定位凹槽中，所述凸缘嵌于所述定位凹槽中；
    所述镂空的形状与所述磁轭的外形相匹配，所述磁轭的上端嵌于所述镂空中，所述磁轭嵌入所述镂空的深度相当于所述定位凹槽的深度。
  14. 一种耳机，其特征在于，所述耳机中设置有权利要求1-13任意之一所述的发声装置。
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CN204031419U (zh) * 2014-08-21 2014-12-17 广州市创宏电子有限公司 可发光的喇叭
CN104954956A (zh) * 2015-06-25 2015-09-30 国光电器股份有限公司 扬声器的引线结构
CN108430010A (zh) * 2018-01-27 2018-08-21 瑞声科技(新加坡)有限公司 发声器件

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