WO2020087756A1 - 一种发声装置及其加工方法以及耳机 - Google Patents

一种发声装置及其加工方法以及耳机 Download PDF

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Publication number
WO2020087756A1
WO2020087756A1 PCT/CN2018/125706 CN2018125706W WO2020087756A1 WO 2020087756 A1 WO2020087756 A1 WO 2020087756A1 CN 2018125706 W CN2018125706 W CN 2018125706W WO 2020087756 A1 WO2020087756 A1 WO 2020087756A1
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WO
WIPO (PCT)
Prior art keywords
bearing frame
yoke
end surface
generating device
inner edge
Prior art date
Application number
PCT/CN2018/125706
Other languages
English (en)
French (fr)
Inventor
郭晓冬
刘春发
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歌尔股份有限公司
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Filing date
Publication date
Application filed by 歌尔股份有限公司 filed Critical 歌尔股份有限公司
Publication of WO2020087756A1 publication Critical patent/WO2020087756A1/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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2231/00—Details of apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor covered by H04R31/00, not provided for in its subgroups
    • H04R2231/001—Moulding aspects of diaphragm or surround
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00—Loudspeakers
    • H04R2400/11—Aspects regarding the frame of loudspeaker transducers

Definitions

  • the present invention relates to the technical field of electroacoustics, and more specifically, the present invention relates to a sound emitting device and a processing method of the 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, it is necessary to further increase the volume of the rear cavity of the sound-generating device.
  • the space reserved for the rear cavity in the sounding device is very limited.
  • the volume of the rear cavity of the existing sound generating device can no longer meet the higher requirements of its acoustic performance.
  • An object of the present invention is to provide a new technical solution for a sounding device.
  • a sound emitting device including:
  • a magnetic circuit system including a yoke, the yoke having a bottom wall and an annular side wall extending from the bottom wall, the top end of the side wall is formed toward the periphery of the side wall Extended flanges;
  • a load-bearing frame is made of a metal material, the load-bearing frame is in a ring structure, and a hollow is formed in the center of the load-bearing frame;
  • the yoke is positioned at the hollow from the side of the lower end surface of the bearing frame, the flange extends horizontally below the bearing frame, and is fixedly connected to the lower end surface of the bearing frame .
  • a positioning groove corresponding to each of the flanges is formed on the lower end surface of the bearing frame, the positioning groove extends to the hollow, and each of the flanges is embedded in the corresponding Described in the positioning groove.
  • the hollow portion of the bearing frame is formed with an inner edge, the shape of the inner edge is similar to the shape of the side wall, and the positioning groove is formed on the lower end surface of the inner edge, the A gap is distributed on the inner edge along the hollow circular direction, and the gap and the positioning groove are offset from each other.
  • the positioning groove is formed by punching the inner edge from the lower end to the upper end surface. On the upper end surface of the inner edge, the inner edge of the positioning groove forms a protruding step structure.
  • the upper end surface of the side wall is flush with the upper end surface of the inner edge.
  • the hollow is in the shape of a circular hole
  • the magnetic yoke is in the shape of a cylindrical barrel.
  • the top surface of the flange is flush with the top surface of the side wall.
  • the bearing frame is made of magnetically conductive material.
  • the load-bearing frame and the yoke are configured to be divided into one part by punching.
  • the magnetic circuit system further includes a central magnetic portion, the central magnetic portion is disposed in the yoke, the central magnetic portion includes stacked magnets and a magnetic conductive plate, the central magnetic portion and all A magnetic gap is formed between the side walls of the yoke;
  • the sound generating device further includes a vibrating component, the vibrating component includes a diaphragm and a voice coil, the voice coil is connected to one side of the diaphragm, the edge of the diaphragm is fixedly connected to the upper end surface of the carrying frame , The voice coil extends into the magnetic gap.
  • it further includes a conductive column, a through hole is formed in the center of the magnetic circuit system, the conductive column is inserted into the through hole from the bottom of the yoke and passes through the magnetic circuit system, the conductive column Two first electrical connection points are formed on the top of the electrode, and two second electrical connection points are formed on the bottom end of the conductive post, and the two second electrical connection points form an electrical connection with the two first electrical connection points, respectively connection;
  • the voice coil surrounds and surrounds the conductive column, and a lead wire is drawn out from the inner side of the voice coil, and the lead wire is connected to the first electrical connection point.
  • the conductive pillar includes a plastic body portion with an inverted T shape on the side, the plastic body portion includes a core pillar and a support portion connected to the bottom of the core pillar, the core pillar passes through the passage of the magnetic circuit system A hole, the support portion covers the bottom surface of the magnetic circuit system;
  • the conductive post 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 upper end surface of the conductive column is flush with or lower than the upper end surface of the voice coil, and the distance between the upper end surface of the conductive column and the upper end surface of the voice coil is the first distance L1
  • the distance between the upper end face of the central magnetic part of the magnetic circuit system and the upper end face of the voice coil is a second distance L2, the first distance L1 is greater than or equal to 0, and the first distance L1 is less than or equal to 0.3 times The second distance L2;
  • the diameter of the outer periphery of the magnetic circuit system is the first diameter D1
  • the diameter of the portion of the conductive pillar 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 invention also provides a processing method of a sound-emitting device, which is characterized by comprising:
  • S1 providing a magnetically conductive material part, stamping the magnetically conductive material part, so that the base material bottom wall is formed on the magnetically conductive material part, and an upwardly extending first base material side connected to an edge of the base material bottom wall is formed
  • step S3 a positioning groove is punched from the lower end to the upper end direction on the inner edge, and in step S3, the flange is embedded in the positioning groove.
  • the inner edge portion of the positioning groove forms a protruding step structure.
  • an earphone there is also provided an earphone, the earphone is provided with the aforementioned sound-emitting device.
  • the bearing frame is made of metal material, which has the characteristics of good strength and not easy to deform.
  • FIG. 1 is an exploded view of the structure of a sound generating device provided by an embodiment of the present invention.
  • FIG. 2 is a schematic structural view of a yoke provided by an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a bearing frame provided by an embodiment of the present invention.
  • FIG. 4 is a schematic structural view of a carrier frame and a yoke combined together provided by an embodiment of the present invention.
  • FIG. 5 is a cross-sectional view of a carrier frame and a yoke combined together provided by an embodiment of the present invention.
  • the sound generating device includes at least a magnetic circuit system and a bearing frame 5.
  • the magnetic circuit system is used to provide electromagnetic driving force for the vibration of the sound generating device.
  • the bearing frame 5 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.
  • the magnetic circuit system includes a yoke 8 having a bottom wall 81 and an annular side wall 82 extending from the bottom wall 81.
  • the yoke 8 encloses to form an accommodating space capable of carrying other components.
  • a plurality of flanges 83 extending toward the periphery of the side wall 82 are formed at the top of the side wall 82.
  • the flange 83 is used to form a fixed connection with the bearing frame 5.
  • the yoke 8 and the flange 83 are integrally formed by stamping.
  • the one-piece stamping structure has high reliability and is easier to assemble.
  • the yoke 8 and the flange 83 can also be fixedly connected together by other methods well known in the art, and the present invention does not limit this.
  • the bearing frame 5 may be made of metal material. Compared with the existing plastic injection-molded support frame: the use of metal materials to make the bearing frame in the present invention can effectively reduce the manufacturing cost, and the thickness of the bearing frame can be made thinner to a certain extent. Save space, and the metal material has good strength, is not easy to deform, and has a long service life.
  • the bearing frame 5 has an annular structure in appearance, and a hollow 53 is formed in the center of the bearing frame 5. The area of the central hollow 53 of the bearing frame 5 can be used to place other components of the sound-emitting device.
  • a plurality of positioning grooves 51 are formed on the lower end surface of the carrying frame 5.
  • the yoke 8 is positioned at the hollow 53 from the side of the lower end surface of the carrying frame 5.
  • the flange 83 extends horizontally below the bearing frame 5 corresponding to the position of the positioning groove 51, and forms a fixed connection with the lower end surface of the bearing frame 5 to make the magnetic circuit system A fixed connection is formed with the bearing frame 5.
  • the flange 83 can be provided with intermittent ones, which can form positioning on the XY plane with the positioning groove 51 on the bottom surface of the bearing frame 5 to prevent the yoke 8 from rotating relative to the bearing frame 5, and by adjusting the two
  • the positioning in the Z direction is achieved by bonding, welding, hot-melt fixing, etc., to avoid the axial displacement of the yoke 8 relative to the bearing frame 5, and finally to achieve a firm assembly between the yoke 8 and the bearing frame 5.
  • the bearing frame 5 is designed as a ring structure, and its side walls and bottom wall used to surround the magnetic circuit system are eliminated. It can be seen that the side walls and the bottom wall of the yoke 8 can be directly exposed. Through this design, the omitted structure of the bearing frame makes it reduce the occupied space. The saved space can be occupied by the yoke and the entire magnetic circuit system, so that a magnetic circuit system with a larger volume and a stronger magnetic field can be configured.
  • the present invention adopts a manner that the flange 83 is connected to the positioning groove 51.
  • the flange 83 is designed on the top of the side wall 82 of the yoke 8, and the positioning groove 51 is provided on the lower end surface of the carrying frame 5.
  • the positioning groove 51 is recessed a distance upward from the lower end surface of the carrying frame 5.
  • the positioning groove 51 extends along the surface of the lower end surface and extends to the hollow 53. That is, as shown in FIG. 3, it extends to the edge of the hollow 53.
  • each of the flanges 83 is inserted into the corresponding positioning groove 51, respectively.
  • the positioning groove 51 the positioning accuracy between the bearing frame 5 and the yoke 8 can be improved.
  • 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 thickness of the bearing frame may be. Since the bearing frame itself is made of metal material and has high rigidity, when the positioning groove is provided on it, 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. In practical applications, 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 83 is less than or equal to the depth of the positioning groove 51.
  • the matching relationship between the thickness of the flange 83 and the depth of the positioning groove 51 will affect the connection strength between the bearing frame 5 and the yoke 8.
  • 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.
  • an inner edge 54 is formed at the hollow 53 of the carrying frame 5, the shape of the inner edge 54 is similar to the shape of the side wall 82, and the upper edge of the inner edge 54
  • a notch 52 is distributed along the hollow circular direction, and the notch 52 and the flange 83 are offset from each other.
  • the purpose of the design using the notch 52 is that when the yoke 8 and the bearing frame 5 are assembled together, it is equivalent to forming a hole at the position of the notch 52, which can be used for sound leakage, thereby forming an air circulation channel .
  • the gap 52 may be filled with a sound absorbing material.
  • sound absorbing particles may be used as the sound absorbing material.
  • the sound-absorbing particles filled in the gap 52 communicate with the rear cavity of the sound-generating device.
  • the sound-absorbing particles can increase the hole-making structure, can absorb part of the sound energy, have stronger air compression and release capabilities, and increase the virtual space.
  • the volume of the rear cavity helps to improve the low-frequency characteristics of the sound-generating device, thereby improving the acoustic performance of the sound-generating device.
  • an inner edge 54 is formed at the hollow 53 of the carrying frame 5
  • the shape of the inner edge 54 is similar to the shape of the side wall 82
  • the positioning groove 51 is formed On the lower end surface of the inner edge 54, a gap 52 is distributed along the annular direction of the hollow 63 on the inner edge, the gap 52 and the positioning groove 51 are offset from each other, and the side wall 82
  • the upper end surface is flush with the upper end surface of the inner edge 54.
  • the upper end surface of the side wall 82 of the yoke 8 designed in the present invention is flush with the upper end surface of the inner edge of the bearing frame 5, which has the advantage that, on the one hand, the flange and the positioning groove can be positioned more accurately during assembly , And the flange is integrated with the positioning groove to be more integrated; on the other hand, if the notch is used as a sound vent or the sound-absorbing particles are filled inside, it is usually necessary to affix a damping mesh on it, if the position here is Flush is more convenient when applying damping mesh, which is equivalent to attaching damping mesh on a plane.
  • the bearing frame 5 is formed by stamping and forming, and the stamping direction of the inner edge 54 extends from the lower end surface side of the inner edge to the upper end surface side, so that the positioning groove 51 faces upward from the lower end surface of the inner edge The end face is sunken.
  • a step structure is formed on the upper end surface of the inner edge 54, and the positioning groove 51 is located on the lower side of the step structure.
  • the inner edge 54 is deformed upwardly to form the positioning groove 51 and the step structure.
  • each flange 83 is distributed on the side wall of the yoke 8 in a rotationally symmetric or center symmetrical manner with respect to the center of the yoke 8 82 on the top.
  • one positioning groove 51 is formed on the bearing frame 5 for each flange 83 so as to form a fixed connection with the flange 83.
  • four flanges 83 are formed on the yoke 8, and four positioning grooves 51 are correspondingly formed on the bearing frame 5.
  • the four flanges 83 are rotationally symmetric with respect to the center of the yoke 8 with a pitch of 45 degrees.
  • the four flanges 83 are evenly distributed around the yoke 8, which can effectively improve the stability of the fixed connection.
  • three other distributions and numbers such as 120 degrees apart may also be used to meet performance requirements, and the present invention does not limit this.
  • the hollow 53 has a circular hole shape
  • the magnetic yoke 8 has a corresponding cylindrical cylindrical structure.
  • the yoke 8 includes a circular bottom wall 81 and a circular side wall 82.
  • the outer shapes of the two are matched with each other to improve the degree of structural matching between the yoke 8 and the bearing frame 5.
  • the hollow and yoke may also have an elliptical structure, which is not limited by the present invention.
  • the top surface of the flange 83 is flush with the top surface of the side wall 82 of the yoke 8, as shown in FIG. 4. This design can reduce the surrounding range of the bearing frame in the height direction of the yoke, and the structure design of the yoke is simple and the positioning is more convenient.
  • the bearing frame 5 is made of magnetically conductive material.
  • the magnetically permeable material may be, for example, silicon steel material, or other magnetically permeable materials well known in the art, as long as it has magnetic permeability, which is not limited by the present invention.
  • the design of the carrier frame 5 is made of a magnetically conductive material, which can give the carrier frame 5 excellent magnetic permeability.
  • the load-bearing frame 5 and the yoke 8 are configured to be divided into one part by punching.
  • the bearing frame and the yoke can be punched out of one part to form two structures. Since they are two independent structures, there is no need to perform a split process at this time.
  • the two structures punched can be combined in a well-known way integrate.
  • the bearing frame and the yoke can also be punched out of one part to form a structure, that is to say: in this way, the notch, flange, etc. can be punched out directly, so that no subsequent connection process is required, but this may make the punching
  • the finished product cannot be mechanically satisfied, and the stress cannot be released.
  • the magnetic circuit system may further include a central magnetic part 200.
  • the central magnetic part 200 is provided in a space surrounded by the yoke 8.
  • the central magnetic part 200 includes a magnet 7 and a magnetic conducting plate 6 which are arranged in a stack.
  • a certain gap is left between the central magnetic portion and the side wall 82 of the yoke 8, and the gap is a magnetic gap 100 capable of generating a magnetic field, which is used to drive the vibration component of the sound generating device to vibrate.
  • the sound generating device of the present invention further includes the above-mentioned vibration assembly.
  • the vibration assembly includes at least two components of a diaphragm 1 and a voice coil 4.
  • the voice coil 4 is connected to one side surface of the diaphragm 1, the voice coil 4 is used to receive sound signals to generate vibration, and the diaphragm 1 is vibrated by the voice coil 4 to generate sound.
  • the edge of the diaphragm 1 may be fixedly connected to the upper end surface of the carrying frame 5 through a metal ring 2, and the voice coil 4 is suspended in the magnetic gap through the diaphragm 1.
  • the above-mentioned diaphragm 1 includes a diaphragm body, and a spherical top 3 fixedly disposed on the diaphragm body.
  • adopting the design of adding a ball top to the diaphragm body can increase the rigidity of the diaphragm during vibration.
  • the top of the ball may not be provided on the diaphragm body, and the invention is not limited thereto.
  • the sound-emitting device may further include a conductive post 9, and a circuit for conducting a sound signal is formed in the conductive post 9.
  • a through hole is formed in the center of the magnetic circuit system, and the conductive post 9 is inserted into the through hole from the bottom of the yoke 8 and passes through the magnetic circuit system to extend to the Above.
  • the voice coil 4 surrounds the conductive post 9, and two voice coil leads for conducting signals are led out from the voice coil 4.
  • two first electrical connection points are formed on the top of the conductive pillar 9, and the two voice coil leads extend from the voice coil 4 to the middle conductive pillar 9 and are connected to the two On the first electrical connection point.
  • the voice coil lead receives an externally input sound signal through the conductive column 9.
  • the space occupied by the voice coil and the voice coil lead can be reduced, and the vibration stability of the voice coil can be improved from the inside of the voice coil, reducing the possibility of polarization of the voice coil.
  • providing a conductive column in the middle of the magnetic circuit system not only does not affect the performance of the magnetic circuit system, but also makes full use of the larger space occupied by the magnetic circuit system.
  • the conductive post 9 may include a plastic body portion with an inverted T shape on the side.
  • the plastic body portion may include a stem and a support portion connected to the bottom of the stem, as shown in FIG. 1.
  • 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 supporting part is located on the bottom surface of the magnetic circuit system and provides a supporting function for the magnetic circuit system.
  • the conductive post 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.
  • the first end is used to form the first electrical connection point, and the second end is used to form the second electrical connection point.
  • 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 distance between the upper end surface of the conductive column and the upper end surface of the voice coil is a first distance L1
  • the distance between the upper end surface of the central magnetic portion of the magnetic circuit system and the upper end surface of the voice coil is a second distance L2.
  • the first distance L1 refers to the vertical distance between the upper end surface of the conductive column and the upper end surface of the voice coil along the axial direction of the conductive column.
  • the second distance L2 refers to the vertical distance of the central magnetic portion of the magnetic circuit system from the upper end surface of the voice coil along the axial direction of the voice coil.
  • the upper end surface of the conductive pillar is flush with or lower than the upper end surface of the voice coil, as shown in FIG. 3, that is, the first distance L1 is greater than or equal to 0.
  • the upper end surface of the conductive column is lower, which can effectively avoid the collision between the diaphragm and the conductive column, and prevent the noise caused by the collision with the conductive column when the diaphragm vibrates.
  • the first distance L1 is less than or equal to 0.3 times the second distance L2. If the distance between the upper end surface of the conductive column and the upper end surface of the voice coil is too large, it will cause the lead of the voice coil to easily collide with the central magnetic part of the magnetic circuit system, resulting in collision sound. On the one hand, the generated noise will reduce the sound quality of the sounding device, on the other hand, there will also be a risk of disconnection of the voice coil lead.
  • the first distance L1 is greater than or equal to 0, and the first distance L1 is less than or equal to 0.3 times the second distance L2.
  • the diameter of the outer periphery of the magnetic circuit system is the first diameter D1
  • the diameter of the portion of the conductive pillar 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 and placing a conductive post in the center of the magnetic circuit system away from the magnetic gap can effectively avoid the influence of the structural loss of the magnetic circuit system on the generation of electromagnetic fields.
  • the conductive pillar 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 conductive column arranged 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 may further include a mesh cloth 10.
  • the mesh cloth 10 may use a waterproof mesh cloth, which may play a good role in protecting the conductive pillar 9 described above. It can make the whole sounding device have better waterproof effect.
  • the sound-generating device provided by the embodiment of the present invention can be applied to many consumer electronic products such as earphones, smart phones, tablet computers, VR devices, etc.
  • the present invention does not limit this.
  • the sound-generating device designed by the present invention can use the space more effectively, and configure a larger magnetic circuit system to enhance the acoustic performance of the sound-generating device, thereby meeting the performance requirements of the earphone.
  • an embodiment of the present invention also provides a processing method of the foregoing sound-emitting device, including at least the following steps:
  • S1 providing magnetically conductive material parts; mainly used for making the bearing frame, which can make the bearing frame have good magnetic permeability, for example, silicon steel material can be selected as the magnetic conductive material, which is well-known in the art, and the present invention does not do this limit.
  • Stamping the magnetically permeable material part to form a base material bottom wall, an upwardly extending first base material side wall connected to the edge of the base material bottom wall, and the first base material side on the magnetically conductive material part A substrate horizontal wall connected to the top of the wall, and a second substrate side wall extending upwardly connected to the edge of the substrate horizontal wall.
  • the second portion of the base material horizontal ratio is cut to one side of the carrier frame for forming an inner edge of the carrier frame, and a position on the inner edge corresponding to the flange is formed with a notch.
  • a hollow is formed in the middle of the bearing frame, and the position of the hollow corresponds to the yoke that is cut off.
  • an inner edge and a positioning groove may be stamped on the lower surface of the bearing frame.
  • a positioning groove is formed by punching from the direction in which the lower end faces the upper end face.
  • the positioning groove extends to the hollow, and in step S3, the flange is embedded in the positioning groove.
  • the notch may be formed on the inner edge.
  • a step structure protruding upward may be formed on the upper end surface of the inner edge.
  • the step structure corresponds to the position of the positioning groove, that is, the positioning groove is just below the step structure.
  • 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.
  • the processing method of the sound-emitting device of the present invention is relatively simple, easy to realize in process, and the manufacturing cost is relatively low. Moreover, when the sound-generating device manufactured by this processing method is applied to electronic equipment, it can make more effective use of space and configure a larger magnetic circuit system to enhance the acoustic performance of the sound-generating device.

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

Abstract

本发明公开了一种发声装置及其加工方法以及耳机。该发声装置包括：磁路系统，所述磁路系统包括磁轭，所述磁轭具有底壁和从所述底壁上延伸出的环形的侧壁,所述侧壁的顶端形成有向所述侧壁的外围延伸的若干个凸缘；承载框架，所述承载框架采用金属材料制成，所述承载框架呈环形结构，所述承载框架的中心形成有镂空；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，并与所述承载框架的下端面固定连接。本发明的一个技术效果在于：能够降低承载框架占用的空间。

Description

一种发声装置及其加工方法以及耳机 技术领域
本发明涉及电声技术领域，更具体地，本发明涉及一种发声装置以及发声装置的加工方法。
背景技术
近年来，消费类电子产品得到了快速的发展，智能手机、平板电脑、VR设备等电子产品得到消费者的普遍认可，并且得到了较为广泛的应用。本领域技术人员对相关的配套产品例如耳机等也相应进行了改进，以满足电子产品的性能要求，满足消费者对电子产品性能的需要。
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，需要进一步提高发声装置的后腔的容积。
目前，随着发声装置尺寸的限制，在发声装置内预留给后腔的空间是十分有限的。现有的发声装置的后腔容积已经无法满足其声学性能的更高要求。
由此可见，很有必要对发声装置进行改进，增大发声装置的后腔容积或者改善后腔的声学性能，从而提升发声装置的低音效果。
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，包括：
磁路系统，所述磁路系统包括磁轭，所述磁轭具有底壁和从所述底壁上延伸出的环形的侧壁,所述侧壁的顶端形成有向所述侧壁的外围延伸的若干个凸缘；
承载框架，所述承载框架采用金属材料制成，所述承载框架呈环形结构，所述承载框架的中心形成有镂空；
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，并与所述承载框架的下端面固定连接。
可选地，所述承载框架的下端面上形成有与各个所述凸缘一一对应的定位凹槽，所述定位凹槽延伸至所述镂空处，各个所述凸缘分别嵌入对应的所述定位凹槽中。
可选地，所述承载框架的镂空处形成有内沿，所述内沿的形状与所述侧壁的形状相仿形，所述定位凹槽形成在所述内沿的下端面上，所述内沿上沿着所述镂空的环形方向分布有缺口，所述缺口与所述定位凹槽相互错开。
可选地，所述定位凹槽为对所述内沿由下端面向上端面方向冲压形成，在所述内沿的上端面，所述定位凹槽处的内沿部分形成凸出的台阶结构。
可选地，所述侧壁的上端面与所述内沿的上端面相齐平。
可选地，所述镂空呈圆孔状，所述磁轭呈圆柱筒形。
可选地，所述凸缘的顶面与所述侧壁的顶面齐平。
可选地，所述承载框架采用导磁材料制成。
可选地，所述承载框架和磁轭被配置为由一个部件经冲裁成型分割而成。
可选地，所述磁路系统还包括中心磁部，所述中心磁部设置在所述磁轭中，所述中心磁部包括堆叠设置的磁铁和导磁板，所述中心磁部与所述磁轭的侧壁之间形成有磁间隙；
所述发声装置还包括振动组件，所述振动组件包括振膜和音圈，所述音圈连接在所述振膜的一侧，所述振膜的边缘固定连接在所述承载框架的上端面上，所述音圈伸入所述磁间隙中。
可选地，还包括导电柱，所述磁路系统的中心形成有通孔，所述导电柱从所述磁轭的底部插入所述通孔并穿过所述磁路系统，所述导电柱的顶 端形成有两个第一电连接点，所述导电柱的底端形成两个第二电连接点，两个所述第二电连接点分别与两个所述第一电连接点形成电连接；
所述音圈环绕与所述导电柱周围，所述音圈内侧引出有引线，所述引线连接在所述第一电连接点上。
可选地，所述导电柱包括侧面呈倒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支撑部，所述芯柱穿过所述磁路系统的通孔，所述支撑部覆于所述磁路系统的底面上；
所述导电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，所述导电柱的上端面齐平于或低于所述音圈的上端面，所述导电柱的上端面与所述音圈的上端面之间的距离为第一距离L1，所述磁路系统的中心磁部的上端面与所述音圈的上端面的距离为第二距离L2，所述第一距离L1大于或等于0，所述第一距离L1小于或等于0.3倍的第二距离L2；
所述磁路系统的外周的直径为第一直径D1，所述导电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。
本发明还提供了一种发声装置的加工方法，其特征在于，包括：
S1、提供导磁材料部件，对所述导磁材料部件进行冲压成型，使所述导磁材料部件上形成基材底壁、与基材底壁的边缘连接的向上延伸的第一基材侧壁、与第一基材侧壁的顶端连接的基材水平壁、以及与基材水平壁的边缘连接的向上延伸的第二基材侧壁；
S2、冲裁，在所述基材水平壁上进行冲裁将所述导磁材料部件分割为承载框架和位于承载框架中心的磁轭，所述基材水平壁的第一部分形成磁轭的凸缘，所述基材水平壁的第二部分形成承载框架的内沿，并且内沿上与所述凸缘对应的位置形成缺口；
S3、将所述承载框架与所述磁轭相对旋转，使所述凸缘与所述缺口位 置交错，然后将所述凸缘固定在所述承载框架的边沿的下端面上。
可选地，在S3步骤之前，在内沿上由下端面向上端面方向冲压形成定位凹槽，S3步骤中，将所述凸缘嵌于所述定位凹槽中。
可选地，在所述内沿的上端面，所述定位凹槽处的内沿部分形成凸出的台阶结构。
根据本发明的第三方面，还提供了一种耳机，所述耳机中设置有上述的发声装置。
根据本公开的一个实施例，通过磁轭与承载框架的设计，可以使磁轭的周围无需塑胶外壳包裹，可以有效的节省空间。其中，承载框架采用金属材料制成，具有强度好以及不易变形的特点。
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是本发明实施例提供的发声装置的结构分解图。
图2是本发明实施例提供的磁轭的结构示意图。
图3是本发明实施例提供的承载框架的结构示意图。
图4是本发明实施例提供的承载框架与磁轭结合在在一起的结构示意图。
图5是本发明实施例提供的承载框架与磁轭结合在在一起的剖视图。
附图标记说明：
1-振膜，2-金属环，3-球顶部，4-音圈，5-承载框架，6-导磁板，7-磁铁，8-磁轭，9-导电柱，10-网布，51-定位凹槽，52-缺口，53-镂空，54-内沿，81-底壁，82-侧壁，83-凸缘，100-磁间隙，200-中心磁部。
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。
本发明实施例提供了一种发声装置，如图1所示，所述发声装置至少包括磁路系统和承载框架5。其中，所述磁路系统用于为发声装置的振动提供电磁驱动作用力。所述承载框架5则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。
如图1以及图2所示，所述磁路系统包括磁轭8，所述磁轭8具有底壁81和从所述底壁81上延伸出的环形的侧壁82。磁轭8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82的顶端形成有向所述侧壁82的外围延伸的若干个凸缘83。其中，所述凸缘83用于与所述承载框架5形成固定连接。可选地，所述磁轭8与所述凸缘83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8与凸缘83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1以及图3所示，所述承载框架5可以采用金属材料制成。与现有的采用塑胶注塑成型的支撑框架相比：本发明中采用金属材料制作承载框架，可以有效的降低制作成本，还可以将承载框架的厚度制作的更薄一些，也能在一定程度上节省空间，并且金属材料的强度好、不易变形，具 有较长的使用寿命。所述承载框架5从外形上看呈环形结构，在所述承载框架5的中心形成有镂空53。所述承载框架5中心镂空53的区域可用于放置发声装置的其它部件。
并且，如图3以及图4所示，在所述承载框架5的下端面上形成有若干个定位凹槽51。所述磁轭8从所述承载框架5的下端面一侧定位设置于所述镂空53处。所述凸缘83在水平方向上延伸至所述承载框架5的下方与所述定位凹槽51的位置对应，并与所述承载框架5的下端面形成固定连接，以使所述磁路系统与承载框架5之间形成固定连接。其中，凸缘83可以设置断续的若干个，可以与承载框架5底面的定位凹槽51，形成XY平面上的定位，避免磁轭8相对于承载框架5产生转动，并且通过对两者之间进行粘接、焊接、热熔固定等方式实现Z方向的定位，避免磁轭8相对于承载框架5产生轴向位移，最终实现磁轭8与承载框架5之间的牢固装配。
本发明中将承载框架5设计成环状结构，取消了其用于包围磁路系统的侧壁和底壁。可见，所述磁轭8的侧壁和底壁可以直接暴露在外。通过这种设计，承载框架省略的结构使其减少了占据的空间。节省的空间可以供所述磁轭以及整个磁路系统占用，从而可以配置体积更大、磁场更强的磁路系统。
在承载框架5与磁轭8的连接部分，本发明采用凸缘83与定位凹槽51连接的方式。本发明将所述凸缘83设计在所述磁轭8的侧壁82的顶部，并且将所述定位凹槽51设置在所述承载框架5的下端面上。通过这种设计方式，可以使所述磁轭8只有靠近顶部的区域与所述承载框架5的底部之间配合连接，从而可以大幅降低两者重合、相互包围的部分，从而降低因两者重叠而占用的空间，提高了发声装置的空间利用率，更便于给发声装置配置体积更大的磁路系统。
优选地，如图3所示，所述定位凹槽51从所述承载框架5的下端面向上凹陷一段距离。并且，所述定位凹槽51沿着所述下端面的表面延伸，一直延伸至所述镂空53处。即，如图3所示，延伸到镂空53的边缘。
如图4所示，当所述磁轭8与所述承载框架5相互装配后，各个所述 凸缘83分别嵌入对应的所述定位凹槽51中。通过配置所述定位凹槽51，能够提高所述承载框架5与磁轭8之间的定位准确性。
进一步地，在所述承载框架5的下端面上形成有定位凹槽51的实施方式中，由于所述凸缘83会向定位凹槽51中嵌入相当于定位凹槽51深度的距离，所以，所述磁轭8的侧壁82的端部会更靠近与所述镂空53处。如果所述凸缘83自身平齐于所述磁轭8的侧壁82的顶部，或者略微低于所述磁轭8的侧壁82的顶部，则所述磁轭8的侧壁82的顶部会嵌于所述镂空53处，如图4所示。在这种实施方式中，磁轭8与承载框架5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83与承载框架5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。
可选地，所述承载框架的厚度可以为。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83的厚度小于或等于所述定位凹槽51的深度。所述凸缘83的厚度与所述定位凹槽51的深度之间的配合关系会影响到承载框架5与磁轭8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。
可选地，如图4所示，所述承载框架5的镂空53处形成有内沿54，所述内沿54的形状与所述侧壁82的形状相仿形，所述内沿54上沿着所述镂空的环形方向分布有缺口52，所述缺口52与所述凸缘83相互错开。采 用缺口52的设计的目的在于：当磁轭8与承载框架5二者装配在一起后，相当于在缺口52的位置形成一个孔洞，该孔洞可以用于进行泄声，从而形成了空气流通通道。进一步地，可以在该缺口52内填充吸音材料，吸音材料例如可以采用吸音颗粒。缺口52内填充的吸音颗粒与发声装置的后腔连通，吸音颗粒可以增加孔造结构，能够吸收掉部分声能，空气压缩和释放能力更强，虚拟空间增大，等效扩大了发声装置的后腔容积，有助于提升发声装置的低频特性，从而达到提升发声装置声学性能的效果。
可选地，如图4所示，所述承载框架5的镂空53处形成有内沿54，所述内沿54的形状与所述侧壁82的形状相仿形，所述定位凹槽51形成在所述内沿54的下端面上，所述内沿上沿着所述镂空63的环形方向分布有缺口52，所述缺口52与所述定位凹槽51相互错开，所述侧壁82的上端面与所述内沿54的上端面相齐平。其中，本发明中设计磁轭8的侧壁82的上端面与承载框架5的内沿上端面相齐平，其优势在于：一方面，在装配时，可以使凸缘与定位凹槽定位更加准确，以及凸缘与定位凹槽结合后一体性更强；另一方面，若将缺口作为泄声孔或者在其内部填充吸音颗粒时，通常需要在其上贴阻尼网布，若此处位置是齐平的在贴阻尼网布时更加的方便，就相当于在一个平面上贴阻尼网布。
优选地，所述承载框架5采用冲压成型的方式形成，所述内沿54的冲压方向从内沿的下端面一侧向上端面一侧，使得所述定位凹槽51从内沿的下端面向上端面凹陷。如图3所示，在所述内沿54的上端面处形成有台阶结构，所述定位凹槽51位于所述台阶结构的下侧。实际上，通过冲压成型工艺，使所述内沿54发生向上弯折的变形，从而形成所述定位凹槽51和台阶结构。这种设计方式的优点在于，所述内沿通过弯折避让的形式形成定位凹槽，结构不易损坏并且成型工艺简单。
可选地，所述磁轭8上至少形成有两个所述凸缘83，各个凸缘83相对于所述磁轭8的中心以旋转对称或中心对称的形式分布在磁轭8的侧壁82的顶端上。相应地，所述承载框架5上对应每一个所述凸缘83形成有一个所述定位凹槽51，以便于与凸缘83之间形成固定连接。这种设计方式能够提高磁轭连接在承载框架上的平衡性和连接可靠性，该方式实施起 来也比较简单。
在如图2-图4所示的实施方式中，在所述磁轭8上形成有四个所述凸缘83，在所述承载框架5上也相应的形成有四个定位凹槽51。四个所述凸缘83相对于磁轭8的中心呈间距45度旋转对称的形式。四个凸缘83均匀分布在所述磁轭8的四周，能够有效提高固定连接的稳定性。在其它实施方式中，对于所述凸缘83和定位凹槽51，也可以采用三个分别相距120度等其它分布方式和数量，以满足性能要求，本发明不对此进行限制。
可选地，如图3所示，所述镂空53呈圆孔状，所述磁轭8相应的呈圆柱筒形结构。所述磁轭8包括圆形的底壁81和呈圆环形的侧壁82。两者的外形相互匹配，以提高磁轭8与承载框架5之间的结构匹配程度。例如，所述镂空和磁轭还可以呈椭圆形结构，本发明不对此进行限制。优选地，所述凸缘83的顶面与所述磁轭8的侧壁82的顶面齐平，如图4所示。这种设计能够减小承载框架在磁轭的高度方向上对磁轭的包围范围，而且磁轭的结构设计简单，定位更便捷。
可选地，所述承载框架5采用导磁材料制成。导磁材料例如可以使硅钢材料，或者本领域熟知的其它导磁材料，只要具有导磁性即可，本发明对此不做限制。本发明中，承载框架5设计用导磁材料制作，可以赋予承载框架5优异的导磁性能。
本发明中，所述承载框架5和磁轭8被配置为由一个部件经冲裁成型分割而成。实际上，承载框架和磁轭可以由一个部件冲裁形成两个结构，由于是两个独立的结构，此时无需进行分割处理，可以将冲裁成的两个结构以本领域熟知的结合方式结合在一起。当然，承载框架和磁轭也可以由一个部件冲裁成型为一个结构，也就是说：该方式下可以直接冲裁出缺口、凸缘等，这样无需后续的连接工艺，但是，这样可能使冲裁出的成品在力学上无法满足，应力上释放不出来。
可选地，如图1以及图5所示，所述磁路系统还可以包括中心磁部200。所述中心磁部200设置在由所述磁轭8围合形成的空间中。所述中心磁部200包括堆叠设置的磁铁7和导磁板6。所述中心磁部与所述磁轭8的侧壁82之间留有一定间隙，该间隙为能够产生磁场的磁间隙100，用于驱动发 声装置的振动组件振动。
本发明的发声装置还包括了上述振动组件。如图1所示，所述振动组件至少包括振膜1和音圈4两个部件。所述音圈4连接在所述振膜1的一侧表面上，所述音圈4用于接收声音信号产生振动，所述振膜1则在音圈4的带动下振动进而发声。所述振膜1的边缘可以通过金属环2固定连接在所述承载框架5的上端面上，所述音圈4则通过所述振膜1悬于所述磁间隙内。
可选地，上述的振膜1包括振膜本体，以及固定设置在该振膜本体上的球顶部3。其中，采用在振膜本体上加设球顶部的设计，可以提高振膜振动时的刚性。当然，也可以不在振膜本体上设置球顶部，对此本发明不做限制。
优选地，如图1所示，所述发声装置还可以包括导电柱9，所述导电柱9中形成有用于导通声音信号的电路。所述磁路系统的中心形成有通孔，所述导电柱9从所述磁轭8的底部插入所述通孔，并从所述磁路系统中穿过，伸至所述磁路系统的上方。所述音圈4环绕在所述导电柱9周围，音圈4上引出有用于导通信号的两支音圈引线。相应的，所述导电柱9的顶端形成有两个第一电连接点，两支所述音圈引线从所述音圈4上向中间的导电柱9延伸，并分别连接在两个所述第一电连接点上。所述音圈引线通过导电柱9接收外界输入的声音信号。通过这种设计方式，一方面能够减小音圈及音圈引线占用的空间，而且能够从音圈内侧提高音圈的振动稳定性，降低音圈发生偏振的可能性。另一方面，在所述磁路系统中间设置导电柱，既不会影响磁路系统的性能，又可以充分利用磁路系统所占据的较大空间。
可选地，所述导电柱9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支撑部，如图1所示。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。所述支撑部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。
导电柱还包括两个金属件，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。所述第一端部用于构成上述第一电连接点，所述第二端部则用于构成所述第二电连接点。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。
导电柱的上端面与音圈的上端面之间的距离为第一距离L1，磁路系统的中心磁部的上端面与音圈的上端面的距离为第二距离L2。所述第一距离L1指沿着导电柱的轴向，导电柱的上端面距离音圈的上端面的竖直距离。所述第二距离L2指沿着音圈的轴向，所述磁路系统的中心磁部距离音圈的上端面的竖直距离。可选地，所述导电柱的上端面齐平于或者低于所述音圈的上端面，如图3所示，即所述第一距离L1大于或等于0。导电柱的上端面较低，能够有效避免振膜与导电柱之间发生碰撞，防止振膜振动时因与导电柱发生碰撞而引起杂音。优选地，第一距离L1小于或等于0.3倍的第二距离L2。如果导电柱的上端面低于音圈的上端面的距离过大，则会造成音圈的引线容易与磁路系统的中心磁部发生碰撞，产生碰撞声音。一方面，产生的杂音会降低发声装置的音质，另一方面，也会存在造成音圈引线断线的风险。优选地，所述第一距离L1大于或等于0，所述第一距离L1小于或等于0.3倍的第二距离L2。
所述磁路系统的外周的直径为第一直径D1，导电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导电柱，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，导电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导电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。
优选地，如图1所示，所述发声装置还可以包括网布10，该网布10可以采用防水网布，可以对上述的导电柱9起到良好的保护作用。可以使整个发声装置具有较好的防水效果。
本发明实施例提供的发声装置，可应用于耳机、智能手机、平板电脑、VR设备等诸多消费类电子产品中，本发明对此不做限制。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，以增强发声装置的声学性能，进而满足耳机的性能要求。
另一方面，本发明实施例还提供了上述发声装置的加工方法，至少包括以下步骤：
S1、提供导磁材料部件；主要用于制作承载框架，可以使承载框架具有良好的导磁性，导磁材料例如可以选择采用硅钢材料等，本领域熟知的导磁材料，本发明对此不做限制。
对所述导磁材料部件进行冲压成型，使所述导磁材料部件上形成基材底壁、与基材底壁的边缘连接的向上延伸的第一基材侧壁、与第一基材侧壁的顶端连接的基材水平壁、以及与基材水平壁的边缘连接的向上延伸的第二基材侧壁。
S2、对导磁材料部件进行冲裁处理，将导磁材料部件冲裁成环状的承载框架和位于承载框架中心的磁轭。上述基材底壁用于构成磁轭的底板，第一基材侧壁则构成磁轭的竖直、环形侧壁。冲裁加工工艺的裁切位置位 于上述基材水平壁上。基材水平壁的第一部分被裁切至磁轭一侧，用于形成磁轭的凸缘。基材水平比的第二部分被裁切至承载框架的一侧，用于形成承载框架的内沿，并且内沿上与所述凸缘对应的位置形成缺口。所述承载框架中间形成有镂空，镂空的位置对应为被裁切下来的所述磁轭。
S3、将所述磁轭与承载框架绕所述底板的中心旋转预定角度，使所述凸缘与所述缺口的位置相互交错、错开。之后，将所述凸缘固定连接在所述承载框架的下表面上，使所述磁轭固定设置在所述承载框架的镂空处。
可选地，在S3步骤之前，可以在所述承载框架下表面上冲压形成内沿和定位凹槽。在所述内沿上，由下端面向上端面的方向冲压形成定位凹槽。所述定位凹槽延伸至所述镂空处，在S3步骤中，将所述凸缘嵌于所述定位凹槽中优选地，所述磁轭的侧壁的顶端与所述内沿的上端面齐平。此外，所述缺口可以形成在所述内沿上。
可选地，通过上述冲压成型工艺，可以在所述内沿的上端面上形成向上凸出的台阶结构。所述台阶结构与所述定位凹槽位置对应，即定位凹槽正好处于台阶结构下方。通过冲压成型使内沿变形，能够直接形成上述台阶机构以及定位凹槽。成型工艺简单且不易使导磁材料部件损坏。
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。
本发明的发声装置的加工方法较为简单、在工艺上容易实现，制作成本也比较低。而且，利用该加工方式制造出的发声装置，将其应用于电子设备内时，能够更有效的利用空间，配置体积更大的磁路系统，以增强发声装置的声学性能。
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 (17)

  1. 一种发声装置，其特征在于，包括：
    磁路系统，所述磁路系统包括磁轭，所述磁轭具有底壁和从所述底壁上延伸出的环形的侧壁,所述侧壁的顶端形成有向所述侧壁的外围延伸的若干个凸缘；
    承载框架，所述承载框架采用金属材料制成，所述承载框架呈环形结构，所述承载框架的中心形成有镂空；
    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，并与所述承载框架的下端面固定连接。
  2. 根据权利要求1所述的发声装置，其特征在于，所述承载框架的下端面上形成有与各个所述凸缘一一对应的定位凹槽，所述定位凹槽延伸至所述镂空处，各个所述凸缘分别嵌入对应的所述定位凹槽中。
  3. 根据权利要求2所述的发声装置，其特征在于，所述承载框架的镂空处形成有内沿，所述内沿的形状与所述侧壁的形状相仿形，所述定位凹槽形成在所述内沿的下端面上，所述内沿上沿着所述镂空的环形方向分布有缺口，所述缺口与所述定位凹槽相互错开。
  4. 根据权利要求3所述的发声装置，其特征在于，所述定位凹槽为对所述内沿由下端面向上端面方向冲压形成，在所述内沿的上端面，所述定位凹槽处的内沿部分形成凸出的台阶结构。
  5. 根据权利要求3或4所述的发声装置，其特征在于，所述侧壁的上端面与所述内沿的上端面相齐平。
  6. 根据权利要求1所述的发声装置，其特征在于，所述镂空呈圆孔状，所述磁轭呈圆柱筒形。
  7. 根据权利要求6所述的发声装置，其特征在于，所述凸缘的顶面与所述侧壁的顶面齐平。
  8. 根据权利要求1-7任一所述的发声装置，其特征在于，所述承载框架采用导磁材料制成。
  9. 根据权利要求8所述的发声装置，其特征在于，所述承载框架和磁轭被配置为由一个部件经冲裁成型分割而成。
  10. 根据权利要求1-7任意之一所述的发声装置，其特征在于，所述磁路系统还包括中心磁部，所述中心磁部设置在所述磁轭中，所述中心磁部包括堆叠设置的磁铁和导磁板，所述中心磁部与所述磁轭的侧壁之间形成有磁间隙；
    所述发声装置还包括振动组件，所述振动组件包括振膜和音圈，所述音圈连接在所述振膜的一侧，所述振膜的边缘固定连接在所述承载框架的上端面上，所述音圈伸入所述磁间隙中。
  11. 根据权利要求10所述的发声装置，其特征在于，还包括导电柱，所述磁路系统的中心形成有通孔，所述导电柱从所述磁轭的底部插入所述通孔并穿过所述磁路系统，所述导电柱的顶端形成有两个第一电连接点，所述导电柱的底端形成两个第二电连接点，两个所述第二电连接点分别与两个所述第一电连接点形成电连接；
    所述音圈环绕与所述导电柱周围，所述音圈内侧引出有引线，所述引线连接在所述第一电连接点上。
  12. 根据权利要求11所述的发声装置，其特征在于，所述导电柱包括侧面呈倒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支撑部，所述芯柱穿过所述磁路系统的通孔，所述支撑部覆于所述磁路系统的底面上；
    所述导电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。
  13. 根据权利要求11所述的发声装置，其特征在于，所述导电柱的上端面齐平于或低于所述音圈的上端面，所述导电柱的上端面与所述音圈的上端面之间的距离为第一距离L1，所述磁路系统的中心磁部的上端面与所述音圈的上端面的距离为第二距离L2，所述第一距离L1大于或等于0，所述第一距离L1小于或等于0.3倍的第二距离L2；
    所述磁路系统的外周的直径为第一直径D1，所述导电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。
  14. 一种如权利要求1-13任意之一所述的发声装置的加工方法，其特征在于，包括：
    S1、提供导磁材料部件，对所述导磁材料部件进行冲压成型，使所述导磁材料部件上形成基材底壁、与基材底壁的边缘连接的向上延伸的第一基材侧壁、与第一基材侧壁的顶端连接的基材水平壁、以及与基材水平壁的边缘连接的向上延伸的第二基材侧壁；
    S2、冲裁，在所述基材水平壁上进行冲裁将所述导磁材料部件分割为承载框架和位于承载框架中心的磁轭，所述基材水平壁的第一部分形成磁轭的凸缘，所述基材水平壁的第二部分形成承载框架的内沿，并且内沿上与所述凸缘对应的位置形成缺口；
    S3、将所述承载框架与所述磁轭相对旋转，使所述凸缘与所述缺口位置交错，然后将所述凸缘固定在所述承载框架的边沿的下端面上。
  15. 根据权利要求14所述的加工方法，其特征在于，在S3步骤之前，在内沿上由下端面向上端面方向冲压形成定位凹槽，S3步骤中，将所述凸缘嵌于所述定位凹槽中。
  16. 根据权利要求15所述的加工方法，其特征在于，在所述内沿的上端面，所述定位凹槽处的内沿部分形成凸出的台阶结构。
  17. 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。
PCT/CN2018/125706 2018-11-02 2018-12-29 一种发声装置及其加工方法以及耳机 WO2020087756A1 (zh)

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