CN109362022B - Sound production device, processing method thereof and earphone - Google Patents
Sound production device, processing method thereof and earphone Download PDFInfo
- Publication number
- CN109362022B CN109362022B CN201811303054.XA CN201811303054A CN109362022B CN 109362022 B CN109362022 B CN 109362022B CN 201811303054 A CN201811303054 A CN 201811303054A CN 109362022 B CN109362022 B CN 109362022B
- Authority
- CN
- China
- Prior art keywords
- magnetic
- bearing frame
- inner edge
- yoke
- side wall
- 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.)
- Active
Links
Images
Classifications
-
- 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
Abstract
The invention discloses a sound production device, a processing method thereof and an earphone. This sound generating mechanism includes: the magnetic circuit system comprises a magnetic yoke, wherein the magnetic yoke is provided with a bottom wall and an annular side wall extending from the bottom wall, and a plurality of flanges extending to the periphery of the side wall are formed at the top end of the side wall; the bearing frame is made of metal materials and is of an annular structure, and a hollow part is formed in the center of the bearing frame; the magnetic yoke is positioned at the hollow part from one side of the lower end face of the bearing frame, and the flange extends to the lower part of the bearing frame in the horizontal direction and is fixedly connected with the lower end face of the bearing frame. One technical effect of the invention is that: the space occupied by the bearing frame can be reduced.
Description
Technical Field
The invention relates to the technical field of electroacoustic, in particular to a sound production device and a processing method of the sound production device.
Background
In recent years, consumer electronics have been rapidly developed, and electronic products such as smart phones, tablet computers, VR devices, and the like have been generally accepted by consumers and are widely used. Those skilled in the art have made corresponding improvements to related accessories, such as earphones, etc., to meet the performance requirements of electronic products and meet the requirements of consumers for the performance of electronic products.
Sound generating devices are important electroacoustic transducer components in consumer electronics, and are widely used as speakers, earphones, and the like. As the performance of electronic products improves, there is also a necessary trend regarding the improvement of the acoustic performance of sound emitting devices. In order to satisfy better acoustic performance, the volume of the rear chamber of the sound generating apparatus needs to be further increased.
Currently, with the size limitation of sound generators, the space reserved for the back cavity in the sound generator is very limited. The back volume of the existing sound generating device cannot meet the higher requirement of the acoustic performance.
Therefore, it is necessary to improve the sound generating device to increase the volume of the rear cavity of the sound generating device or improve the acoustic performance of the rear cavity, so as to improve the bass effect of the sound generating device.
Disclosure of Invention
One object of the present invention is to provide a new solution for a sound generating device.
According to a first aspect of the present invention, there is provided a sound emitting apparatus comprising:
the magnetic circuit system comprises a magnetic yoke, wherein the magnetic yoke is provided with a bottom wall and an annular side wall extending from the bottom wall, and a plurality of flanges extending to the periphery of the side wall are formed at the top end of the side wall;
the bearing frame is made of metal materials and is of an annular structure, and a hollow part is formed in the center of the bearing frame;
the magnetic yoke is positioned at the hollow part from one side of the lower end face of the bearing frame, and the flange extends to the lower part of the bearing frame in the horizontal direction and is fixedly connected with the lower end face of the bearing frame.
Optionally, a positioning groove corresponding to each of the flanges one to one is formed on the lower end surface of the bearing frame, the positioning groove extends to the hollow-out portion, and each of the flanges is embedded into the corresponding positioning groove.
Optionally, an inner edge is formed at the hollow part of the bearing frame, the shape of the inner edge is profiled with the shape of the side wall, the positioning groove is formed on the lower end surface of the inner edge, notches are distributed on the inner edge along the annular direction of the hollow part, and the notches and the positioning groove are staggered.
Optionally, the positioning groove is formed by stamping the inner edge from a lower end surface to an upper end surface, and a convex step structure is formed on the inner edge part of the positioning groove on the upper end surface of the inner edge.
Optionally, an upper end surface of the sidewall is flush with an upper end surface of the inner edge.
Optionally, the hollow part is in a circular hole shape, and the magnetic yoke is in a cylindrical barrel shape.
Optionally, the top surface of the flange is flush with the top surface of the sidewall.
Optionally, the carrying frame is made of a magnetically conductive material.
Optionally, the carrying frame and the yoke are configured to be divided from one piece by blanking.
Optionally, the magnetic circuit system further includes a central magnetic portion disposed in the magnetic yoke, the central magnetic portion includes a stacked magnet and a magnetic conductive plate, and a magnetic gap is formed between the central magnetic portion and a side wall of the magnetic yoke;
the sound production device further comprises a vibration assembly, the vibration assembly comprises a vibrating diaphragm and a voice coil, the voice coil is connected to one side of the vibrating diaphragm, the edge of the vibrating diaphragm is fixedly connected to the upper end face of the bearing frame, and the voice coil stretches into the magnetic gap.
Optionally, the magnetic circuit system further comprises 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 magnetic yoke and penetrates through the magnetic circuit system, two first electrical connection points are formed at the top end of the conductive column, two second electrical connection points are formed at the bottom end of the conductive column, and the two second electrical connection points are electrically connected with the two first electrical connection points respectively;
the voice coil encircles with around leading electrical pillar, lead wire has been drawn forth to the voice coil inboard, the lead wire connect in on the first electrical connection point.
Optionally, the conductive pillar includes a plastic body portion with an inverted T-shaped side surface, the plastic body portion includes a stem and a support portion connected to a bottom of the stem, the stem passes through the through hole of the magnetic circuit system, and the support portion covers a bottom surface of the magnetic circuit system;
the conductive column further comprises two metal pieces which are injected into the plastic body part, each metal piece comprises a first end part and a second end part which are parallel to each other, and an intermediate part which is connected with the first end part and the second end part, the first end part is exposed out of the top surface of the core column to form a first electric connection point, and the second end part is exposed out of the bottom surface of the supporting part to form a second electric connection point.
Optionally, the upper end surface of the conductive pillar is flush with or lower than the upper end surface of the voice coil, a distance between the upper end surface of the conductive pillar and the upper end surface of the voice coil is a first distance L1, a 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 is greater than or equal to 0, and the first distance L1 is less than or equal to 0.3 times of the second distance L2;
the diameter of the outer periphery of the magnetic circuit system is a first diameter D1, the diameter of the part of the conductive column located in the through hole is a second diameter D2, and the second diameter D2 is smaller than or equal to 0.32 times the first diameter D1.
The invention also provides a processing method of the sound production device, which is characterized by comprising the following steps:
s1, providing a magnetic conduction material component, and performing punch forming on the magnetic conduction material component to form a base material bottom wall, a first base material side wall extending upwards and connected with the edge of the base material bottom wall, a base material horizontal wall connected with the top end of the first base material side wall, and a second base material side wall extending upwards and connected with the edge of the base material horizontal wall;
s2, blanking, namely, blanking the base material horizontal wall to divide the magnetic conductive material part into a bearing frame and a magnetic yoke positioned in the center of the bearing frame, wherein the first part of the base material horizontal wall forms a flange of the magnetic yoke, the second part of the base material horizontal wall forms an inner edge of the bearing frame, and a notch is formed in the position, corresponding to the flange, of the inner edge;
and S3, relatively rotating the bearing frame and the magnetic yoke to enable the flange to be staggered with the notch, and then fixing the flange on the lower end face of the edge of the bearing frame.
Optionally, before the step of S3, a positioning groove is punched upward from the lower end to the upper end surface along the inner edge, and in the step of S3, the flange is inserted into the positioning groove.
Optionally, on the upper end face of the inner edge, a protruding step structure is formed on the inner edge part at the positioning groove.
According to a third aspect of the present invention, there is also provided a headset, in which the sound generating device is provided.
According to an embodiment of the present disclosure, through the design of the magnetic yoke and the bearing frame, the surrounding of the magnetic yoke does not need to be wrapped by a plastic shell, and the space can be effectively saved. The bearing frame is made of metal materials and has the advantages of being good in strength and not prone to deformation.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
Fig. 1 is an exploded view of a sound generating device according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a magnetic yoke according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a bearing frame according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a carrier frame and a magnetic yoke combined together according to an embodiment of the present invention.
Fig. 5 is a sectional view of a yoke and a carrier frame according to an embodiment of the present invention.
Description of reference numerals:
1-diaphragm, 2-metal ring, 3-ball top, 4-voice coil, 5-bearing frame, 6-magnetic conductive plate, 7-magnet, 8-magnetic yoke, 9-conductive column, 10-mesh, 51-positioning groove, 52-notch, 53-hollow, 54-inner edge, 81-bottom wall, 82-side wall, 83-flange, 100-magnetic gap, 200-central magnetic part.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
An embodiment of the present invention provides a sound generating apparatus, as shown in fig. 1, the sound generating apparatus at least includes a magnetic circuit system and a bearing frame 5. The magnetic circuit system is used for providing electromagnetic driving acting force for vibration of the sound generating device. The bearing frame 5 is used for providing supporting and positioning functions for the magnetic circuit system and other parts of the sound generating device, so that the parts can be fixedly connected into an integral device.
As shown in fig. 1 and 2, the magnetic circuit system includes a yoke 8, and the yoke 8 has a bottom wall 81 and an annular side wall 82 extending from the bottom wall 81. The yokes 8 enclose a receiving space which can carry other components. A plurality of flanges 83 extending toward the periphery of the side wall 82 are formed at the top end of the side wall 82. Wherein the flange 83 is used for forming a fixed connection with the carrying frame 5. Alternatively, the yoke 8 and the flange 83 are integrally press-molded members. The structure reliability of integrative stamping forming is high, is more convenient for assemble moreover. Of course, the yoke 8 and the flange 83 may be fixedly connected together by other means known in the art, and the present invention is not limited thereto.
As shown in fig. 1 and 3, the carrying frame 5 may be made of a metal material. Compare with current adoption plastic injection moulding's braced frame: according to the invention, the bearing frame is made of the metal material, so that the manufacturing cost can be effectively reduced, the thickness of the bearing frame can be made thinner, the space can be saved to a certain extent, and the metal material has good strength, is not easy to deform and has a longer service life. The carrying frame 5 is in a ring structure in appearance, and a hollow 53 is formed in the center of the carrying frame 5. The area of the central hollow 53 of the bearing frame 5 can be used for placing other parts of the sound generating device.
As shown in fig. 3 and 4, a plurality of positioning grooves 51 are formed on the lower end surface of the carrier frame 5. The magnetic yoke 8 is positioned and arranged at the hollow part 53 from one side of the lower end surface of the bearing frame 5. The flange 83 extends to the lower part of the bearing frame 5 in the horizontal direction corresponding to the position of the positioning groove 51, and forms a fixed connection with the lower end surface of the bearing frame 5, so that a fixed connection is formed between the magnetic circuit system and the bearing frame 5. The flanges 83 may be provided with a plurality of discontinuous flanges, and may form positioning on the XY plane with the positioning grooves 51 on the bottom surface of the carrier frame 5, so as to prevent the yoke 8 from rotating relative to the carrier frame 5, and realize positioning in the Z direction by bonding, welding, hot-melt fixing and the like between the two, so as to prevent the yoke 8 from generating axial displacement relative to the carrier frame 5, and finally realize firm assembly between the yoke 8 and the carrier frame 5.
The invention provides a ring-shaped structure of the carrying frame 5, which eliminates the side wall and the bottom wall for surrounding the magnetic circuit system. It can be seen that the side walls and the bottom wall of the yoke 8 may be directly exposed. By this design, the omitted structure of the load-bearing frame makes it possible to reduce the space occupied. The saved space can be occupied by the magnetic yoke and the whole magnetic circuit system, so that the magnetic circuit system with larger volume and stronger magnetic field can be configured.
In the connection portion of the carrying frame 5 and the yoke 8, the present invention adopts a manner that the flange 83 is connected with the positioning groove 51. The present invention designs the flange 83 on the top of the side wall 82 of the yoke 8 and the positioning groove 51 on the lower end surface of the carrying frame 5. Through the design mode, the magnetic yoke 8 is matched and connected with the bottom of the bearing frame 5 only in the area close to the top, so that the overlapped and mutually-surrounded parts of the magnetic yoke and the bottom can be greatly reduced, the space occupied by the overlapped magnetic yoke and the bottom can be reduced, the space utilization rate of the sound generating device is improved, and a magnetic circuit system with larger volume can be conveniently configured for the sound generating device.
Preferably, as shown in fig. 3, the positioning groove 51 is recessed upward from the lower end surface of the carrying frame 5 by a distance. The positioning groove 51 extends along the surface of the lower end surface and extends to the hollow 53. I.e. to the edges of the hollows 53, as shown in fig. 3.
As shown in fig. 4, when the yoke 8 and the carrier frame 5 are assembled with each other, each of the flanges 83 is fitted into the corresponding positioning groove 51. By disposing the positioning groove 51, the positioning accuracy between the carrier frame 5 and the yoke 8 can be improved.
Further, in the embodiment in which the positioning groove 51 is formed on the lower end surface of the carrying frame 5, since the flange 83 is inserted into the positioning groove 51 by a distance corresponding to the depth of the positioning groove 51, the end of the side wall 82 of the yoke 8 is closer to the hollow 53. If the flange 83 is flush with the top of the side wall 82 of the yoke 8 or slightly lower than the top of the side wall 82 of the yoke 8, the top of the side wall 82 of the yoke 8 will be embedded in the hollow 53, as shown in fig. 4. In this embodiment, both the positioning accuracy and the sealing property between the yoke 8 and the carrier frame 5 can be improved. Moreover, because the technical characteristics that the flange 83 is matched with the lower end face of the bearing frame 5 are adopted in the invention, and the plastic shell structure for encapsulating the magnet yoke on the bearing frame is eliminated, even if the top of the side wall of the magnet yoke is embedded into the hollow part for a short distance, the situation that too many overlapped parts exist between the bearing frame and the magnet yoke and too much space is occupied can not be caused. In the design of the present invention, there is still enough space for increasing the volume of the magnetic circuit system. Optionally, the flange is flush with the top of the side wall of the magnetic yoke, and the depth of the magnetic yoke embedded in the hollow corresponds to the depth of the positioning groove.
Optionally, the thickness of the carrying frame may be. Because the bearing frame is made of metal materials and has higher rigidity, when the positioning groove is arranged on the bearing frame, 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. The invention is not restricted to this, and in practical applications, the depth of the positioning groove may also be designed according to the actual structural strength of the bearing frame and the actual thickness of the flange.
Preferably, the thickness of the flange 83 is less than or equal to the depth of the positioning groove 51. The thickness of the flange 83 and the depth of the positioning groove 51 are matched to affect the connection strength between the bearing frame 5 and the yoke 8. In this preferred embodiment, the lower surface of the flange can be sunk into the positioning groove or flush with the lower end surface of the bearing frame, and this design can make the flange buried in the positioning groove, thereby improving the connection reliability. The present invention does not restrict that the thickness of the flange must be less than or equal to the depth of the positioning groove.
Optionally, as shown in fig. 4, an inner edge 54 is formed at a hollow 53 of the bearing frame 5, the shape of the inner edge 54 is similar to the shape of the side wall 82, notches 52 are distributed on the inner edge 54 along the annular direction of the hollow, and the notches 52 and the flanges 83 are staggered from each other. The design using the notches 52 aims to: when the yoke 8 and the carrying frame 5 are assembled together, a hole is formed at a position corresponding to the notch 52, and the hole can be used for sound leakage, so that an air circulation passage is formed. Further, the notch 52 may be filled with a sound absorbing material, and sound absorbing particles may be used as the sound absorbing material. The sound granule of inhaling that packs in breach 52 communicates with sound generating mechanism's rear chamber, inhales the sound granule and can increase the hole and make the structure, can absorb partial sound energy, and air compression and release capacity are stronger, and virtual space increases, and the equivalent has enlarged sound generating mechanism's rear chamber volume, helps promoting sound generating mechanism's low frequency characteristic to reach the effect that promotes sound generating mechanism acoustic performance.
Optionally, as shown in fig. 4, an inner edge 54 is formed at a hollow 53 of the bearing 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 a lower end surface of the inner edge 54, notches 52 are distributed on the inner edge along the annular direction of the hollow 63, the notches 52 and the positioning groove 51 are staggered, and an upper end surface of the side wall 82 is flush with an upper end surface of the inner edge 54. In the present invention, the upper end surface of the side wall 82 of the yoke 8 is flush with the upper end surface of the inner edge of the carrying frame 5, which is advantageous in that: on one hand, during assembly, the flange and the positioning groove can be positioned more accurately, and the flange and the positioning groove are combined to have stronger integrity; on the other hand, if regard as the breach to let out the sound hole or when sound particles are inhaled in its inside packing, need paste the damping screen cloth on it usually, if this position is more convenient when pasting the damping screen cloth that the position is flushed, just be equivalent to paste the damping screen cloth on a plane.
Preferably, the bearing frame 5 is formed by stamping, and the stamping direction of the inner edge 54 is from the lower end surface side to the upper end surface side of the inner edge, so that the positioning groove 51 is recessed from the lower end surface side to the upper end surface of the inner edge. As shown in fig. 3, a stepped structure is formed at an upper end surface of the inner rim 54, and the positioning groove 51 is located at a lower side of the stepped structure. In fact, the inner edge 54 is deformed by bending upward through a stamping forming process, so that the positioning groove 51 and the step structure are formed. The design mode has the advantages that the inner edge forms the positioning groove in a bending and avoiding mode, the structure is not easy to damage, and the forming process is simple.
Alternatively, at least two flanges 83 are formed on the yoke 8, and each flange 83 is distributed on the top end of the side wall 82 of the yoke 8 in a rotationally symmetrical or centrosymmetrical manner with respect to the center of the yoke 8. Accordingly, one positioning groove 51 is formed on the carrying frame 5 corresponding to each flange 83 so as to form a fixed connection with the flange 83. This design makes it possible to improve the balance and the reliability of the connection of the magnet yoke to the support frame, and this embodiment is also relatively simple to implement.
In the embodiment shown in fig. 2 to 4, four flanges 83 are formed on the yoke 8, and four positioning grooves 51 are correspondingly formed on the carrier frame 5. The four flanges 83 are in the form of rotational symmetry spaced at 45 degrees with respect to the center of the yoke 8. The four flanges 83 are uniformly distributed around the magnetic yoke 8, so that the stability of fixed connection can be effectively improved. In other embodiments, other distribution patterns and numbers of three flanges 83 and positioning grooves 51, which are respectively spaced by 120 degrees, can be adopted to meet the performance requirement, and the invention is not limited thereto.
Alternatively, as shown in fig. 3, the hollow 53 is a circular hole, and the yoke 8 is correspondingly a cylindrical structure. The yoke 8 comprises a circular bottom wall 81 and a circular side wall 82. The shapes of the two are matched with each other so as to improve the structural matching degree between the magnet yoke 8 and the bearing frame 5. For example, the hollow and the yoke may have an elliptical structure, which is not limited by the present invention. Preferably, 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. The design can reduce the surrounding range of the bearing frame to the magnetic yoke in the height direction of the magnetic yoke, and the magnetic yoke is simple in structural design and convenient to position.
Optionally, the carrying frame 5 is made of a magnetic conductive material. The magnetic conductive material may be silicon steel material, or other magnetic conductive materials known in the art, as long as the magnetic conductive material has magnetic conductivity, which is not limited in the present invention. In the invention, the bearing frame 5 is made of magnetic conductive material, so that the bearing frame 5 can have excellent magnetic conductivity.
In the present invention, the carrier frame 5 and the yoke 8 are configured to be divided from one member by blanking. In fact, the carrier frame and the yoke may be punched out of one piece to form two structures, which may be joined together in a manner known in the art without a splitting process, since they are two separate structures. Of course, the carrying frame and the yoke may also be stamped and formed as one structure from one part, that is: in this way, notches, flanges and the like can be directly punched, so that subsequent connection processes are not needed, but the punched finished product can not be mechanically satisfied, and stress can not be released.
Alternatively, as shown in fig. 1 and 5, the magnetic circuit system may further include a central magnetic portion 200. The central magnetic portion 200 is disposed in a space surrounded by the yoke 8. The central magnetic portion 200 includes a magnet 7 and a magnetic conductive plate 6 stacked. A gap is left between the central magnetic part and the side wall 82 of the magnetic yoke 8, and the gap is a magnetic gap 100 capable of generating a magnetic field and is used for driving the vibration component of the sound generating device to vibrate.
The sound production device also comprises the vibration component. As shown in fig. 1, the vibration assembly includes at least two parts, a diaphragm 1 and a voice coil 4. Voice coil loudspeaker voice coil 4 is connected on one side surface of vibrating diaphragm 1, voice coil loudspeaker voice coil 4 is used for receiving sound signal and produces the vibration, vibrating diaphragm 1 then vibrates and then the sound production under the drive of voice coil loudspeaker voice coil 4. The edge of the diaphragm 1 may be fixedly connected to the upper end surface of the carrier frame 5 through a metal ring 2, and the voice coil 4 is suspended in the magnetic gap through the diaphragm 1.
Optionally, the diaphragm 1 includes a diaphragm body, and a ball top portion 3 fixedly disposed on the diaphragm body. Wherein, adopt to add the design of establishing the ball top on the vibrating diaphragm body, rigidity when can improving the vibrating diaphragm vibration. Of course, the top of the ball may not be disposed on the diaphragm body, and the invention is not limited thereto.
Preferably, as shown in fig. 1, the sound generating device may further include a conductive column 9, and a circuit for conducting an acoustic signal is formed in the conductive column 9. A through hole is formed in the center of the magnetic circuit system, and the conductive column 9 is inserted into the through hole from the bottom of the magnetic yoke 8, passes through the magnetic circuit system, and extends to the upper side of the magnetic circuit system. Voice coil 4 encircles around leading electrical pillar 9, has drawn forth two voice coil lead wires that are used for the pilot signal on voice coil 4. Correspondingly, the top of leading electrical pillar 9 is formed with two first electrical connection points, two voice coil lead wires follow it extends to leading electrical pillar 9 in the middle to voice coil 4, and connect respectively two on the first electrical connection point. The voice coil lead receives an externally input sound signal through the conductive post 9. Through this kind of design, can reduce the space that voice coil loudspeaker voice coil and voice coil loudspeaker voice coil lead wire occupy on the one hand, can improve the vibration stability of voice coil loudspeaker voice coil from the voice coil loudspeaker voice coil inboard moreover, reduce the possibility that the voice coil loudspeaker voice coil takes place the polarization. On the other hand, the conductive column is arranged in the middle of the magnetic circuit system, so that the performance of the magnetic circuit system is not influenced, and a larger space occupied by the magnetic circuit system can be fully utilized.
Alternatively, the conductive post 9 may include a plastic body portion with an inverted T-shaped side surface. The plastic body part may comprise a stem and a support part connected to the bottom of the stem, as shown in fig. 1. The core column penetrates through the through hole of the magnetic circuit system and is used for realizing the function of the electric connection. The supporting part is positioned on the bottom surface of the magnetic circuit system and provides a supporting function for the magnetic circuit system.
The conductive column further comprises two metal pieces, and the two metal pieces are fixed in the plastic body part in an injection molding mode. The metal piece has a first end portion, a second end portion and a middle portion. The first end part and the second end part on the same metal piece are in relatively parallel postures, and the middle part is connected between the first end part and the second end part. The first end portion is used for forming the first electric connection point, and the second end portion is used for forming the second electric connection point. The first end portion may be exposed from a top surface of the plastic body portion and the second end portion is exposed from a bottom surface of the plastic body portion. The configuration mode is convenient for the lead and external equipment to realize signal conduction through the metal piece. In addition, the middle part of the metal piece is injected inside the plastic body part, so that the metal piece is not easy to interfere with other conductive and magnetic conductive parts in the sound generating device.
The distance between the upper end face of the conductive column and the upper end face of the voice coil is a first distance L1, and 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 a vertical distance from the upper end surface of the conductive post to the upper end surface of the voice coil along the axial direction of the conductive post. The second distance L2 is a vertical distance from the central magnetic portion of the magnetic circuit system to the upper end surface of the voice coil along the axial direction of the voice coil. Optionally, 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 up end that leads electrical pillar is lower, can effectively avoid the vibrating diaphragm and lead and collide between the electrical pillar, arouse the noise because of with leading electrical pillar collision when preventing the vibrating diaphragm vibration. Preferably, 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, the lead of the voice coil easily collides with the central magnetic part of the magnetic circuit system, and thus collision sound is generated. On the one hand, the generated noise may reduce the sound quality of the sound generating device, and on the other hand, there may be a risk of causing disconnection of the voice coil lead. Preferably, 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 a first diameter D1, and the diameter of the part of the conductive column, which is positioned in the through hole, is a second diameter D2. Preferably, the second diameter D2 is less than or equal to 0.32 times the first diameter D1. The portion of the magnetic circuit system close to the magnetic gap is the portion that contributes most to the generation of electromagnetic force, and the through hole is located away from the magnetic gap. Therefore, the through hole is formed in the central part, far away from the magnetic gap, of the magnetic circuit system, and the conductive column is placed, so that the influence of the structural loss of the magnetic circuit system on the generation of the electromagnetic field can be effectively avoided. Preferably, the conductive posts minimize the second diameter D2 to the extent that the process can be controlled. In the range of D2 ≦ 0.32 × D1, the substantial negative influence on the strength of the generated electromagnetic field can be avoided, and the sensitivity loss is below 0.2 dB.
The diameter of the outer periphery of the sound generator is a third diameter D3. In a preferred embodiment of the invention, the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65. In the prior art, the frame and the shell which are positioned at the periphery of the magnetic circuit system are injected with circuit devices with pads for electric connection, so that a large space at the periphery of the magnetic circuit system is occupied. In the case where the space of the entire sound generating device is limited, the available space left for the magnetic circuit system itself is small. The voice coil is electrically connected with the outside by the conductive column arranged at the center of the magnetic circuit system, and other electric connections do not need to be arranged at the periphery of the magnetic circuit system, so that the space is saved at the periphery of the magnetic circuit system. Compared with the prior art, the size of the magnetic circuit system can be designed to be larger, and the performance of the magnetic circuit system is improved. Preferably, the ratio of the first diameter D1 to the third diameter D3 is greater than or equal to 0.65. Optionally, the ratio of the first diameter D1 to the third diameter is 0.75.
Preferably, as shown in fig. 1, the sound generating device may further include a mesh fabric 10, and the mesh fabric 10 may be a waterproof mesh fabric, which can provide a good protection effect for the conductive pillars 9. The whole sounding device can have a good waterproof effect.
The sound generating device provided by the embodiment of the invention can be applied to various consumer electronic products such as earphones, smart phones, tablet computers, VR equipment and the like, and the invention is not limited to the above. In a limited space in an earphone product, the sound generating device designed by the invention can more effectively utilize the space and is provided with a magnetic circuit system with larger volume so as to enhance the acoustic performance of the sound generating device and further meet the performance requirement of the earphone.
On the other hand, the embodiment of the invention also provides a processing method of the sound generating device, which at least comprises the following steps:
s1, providing a magnetic conductive material component; the method is mainly used for manufacturing the bearing frame, so that the bearing frame has good magnetic conductivity, and the magnetic conductive material can be selected from silicon steel materials and the like, which are well known in the art, but the invention is not limited to this.
And carrying out punch forming on the magnetic conducting material component to form a base material bottom wall, a first base material side wall which is connected with the edge of the base material bottom wall and extends upwards, a base material horizontal wall which is connected with the top end of the first base material side wall and a second base material side wall which is connected with the edge of the base material horizontal wall and extends upwards on the magnetic conducting material component.
And S2, punching the magnetic conductive material part to form an annular bearing frame and a magnetic yoke positioned at the center of the bearing frame. The base bottom wall forms a bottom plate of the yoke, and the first base side wall forms a vertical, annular side wall of the yoke. The cutting position of the blanking process is positioned on the horizontal wall of the base material. A first portion of the horizontal wall of the substrate is cut to the yoke side for forming a flange of the yoke. And cutting the second part of the substrate horizontal ratio to one side of the bearing frame for forming an inner edge of the bearing frame, and forming a notch on the inner edge at a position corresponding to the flange. The middle of the bearing frame is provided with a hollow part, and the position of the hollow part corresponds to the cut magnetic yoke.
And S3, rotating the magnetic yoke and the bearing frame by a preset angle around the center of the bottom plate, and enabling the positions of the flanges and the notches to be staggered. And then, fixedly connecting the flange to the lower surface of the bearing frame, so that the magnetic yoke is fixedly arranged at the hollow part of the bearing frame.
Optionally, before step S3, an inner edge and a positioning groove may be punched on the lower surface of the carrier frame. And a positioning groove is punched on the inner edge from the lower end surface to the upper end surface. The positioning groove extends to the hollow, and in step S3, the flange is embedded in the positioning groove, preferably, the top end of the side wall of the magnetic yoke is flush with the upper end face of the inner edge. Further, the notch may be formed on the inner edge.
Alternatively, an upwardly protruding step structure may be formed on the upper end surface of the inner edge by the above-described punch forming process. The step structure corresponds to the positioning groove in position, namely the positioning groove is just positioned below the step structure. The step mechanism and the positioning groove can be directly formed by deforming the inner edge through punch forming. The forming process is simple and the magnetic conductive material part is not easy to be damaged.
The invention also provides an earphone product, and the earphone is provided with the sound production device. In a limited space in an earphone product, the sound generating device designed by the invention can more effectively utilize the space and is provided with a magnetic circuit system and/or a voice coil with larger volume so as to enhance the acoustic performance of the sound generating device and further meet the performance requirement of the earphone. The headset may be an in-ear headset or a semi-in-ear headset.
The processing method of the sound production device is simple, easy to realize in process and low in manufacturing cost. When the sound generating device manufactured by the processing method is applied to electronic equipment, the space can be more effectively utilized, and a magnetic circuit system with larger volume is configured to enhance the acoustic performance of the sound generating device.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (11)
1. A sound generating device, comprising:
the magnetic circuit system comprises a magnetic yoke, the magnetic yoke is in a cylindrical barrel shape, the magnetic yoke is provided with a bottom wall and an annular side wall extending from the bottom wall, and a plurality of flanges extending to the periphery of the side wall are formed at the top end of the side wall;
the bearing frame is made of metal materials and is of an annular structure, and a hollow part is formed in the center of the bearing frame and is in a circular hole shape;
the bearing frame is made of a magnetic conductive material, the bearing frame and the magnetic yoke are configured to be formed by cutting and forming one part, an inner edge is formed at the hollow part of the bearing frame, the shape of the inner edge is similar to that of the side wall, and a notch is formed at the position, corresponding to the flange, on the inner edge;
the magnetic yoke is positioned and arranged at the hollow part from one side of the lower end surface of the bearing frame, the flanges extend to the lower part of the bearing frame in the horizontal direction and are fixedly connected with the lower end surface of the bearing frame, positioning grooves which are in one-to-one correspondence with the flanges are formed on the lower end surface of the bearing frame and extend to the hollow part, and the flanges are respectively embedded into the corresponding positioning grooves;
the positioning groove is formed on the lower end face of the inner edge, notches are distributed on the inner edge along the annular direction of the hollow part, and the notches and the positioning groove are staggered;
the side wall and the bottom wall of the magnetic yoke are exposed out of the bearing frame; the top surface of the flange is flush with the top surface of the side wall of the yoke.
2. The sound production device according to claim 1, wherein the positioning groove is formed by stamping the inner edge from a lower end surface to an upper end surface, and a convex step structure is formed on the inner edge at the positioning groove at the upper end surface of the inner edge.
3. The sound generating apparatus of claim 2, wherein an upper end surface of the sidewall is flush with an upper end surface of the inner rim.
4. The sound generating apparatus as claimed in any one of claims 1 or 2, wherein the magnetic circuit system further comprises a central magnetic portion, the central magnetic portion is disposed in the magnetic yoke, the central magnetic portion comprises a stacked magnet and a magnetic conductive plate, and a magnetic gap is formed between the central magnetic portion and a side wall of the magnetic yoke;
the sound production device further comprises a vibration assembly, the vibration assembly comprises a vibrating diaphragm and a voice coil, the voice coil is connected to one side of the vibrating diaphragm, the edge of the vibrating diaphragm is fixedly connected to the upper end face of the bearing frame, and the voice coil stretches into the magnetic gap.
5. The sound generating apparatus according to claim 4, further comprising a conductive pillar, wherein a through hole is formed in the center of the magnetic circuit system, the conductive pillar is inserted into the through hole from the bottom of the magnetic yoke and penetrates through the magnetic circuit system, two first electrical connection points are formed at the top end of the conductive pillar, two second electrical connection points are formed at the bottom end of the conductive pillar, and the two second electrical connection points are electrically connected with the two first electrical connection points respectively;
the voice coil encircles with around leading electrical pillar, lead wire has been drawn forth to the voice coil inboard, the lead wire connect in on the first electrical connection point.
6. The sound generating apparatus as claimed in claim 5, wherein the conductive pillar comprises a plastic body portion with an inverted T-shaped side surface, the plastic body portion comprises a stem and a support portion connected to a bottom of the stem, the stem passes through the through hole of the magnetic circuit system, and the support portion covers a bottom surface of the magnetic circuit system;
the conductive column further comprises two metal pieces which are injected into the plastic body part, each metal piece comprises a first end part and a second end part which are parallel to each other, and an intermediate part which is connected with the first end part and the second end part, the first end part is exposed out of the top surface of the core column to form a first electric connection point, and the second end part is exposed out of the bottom surface of the supporting part to form a second electric connection point.
7. The sound generating apparatus as claimed in claim 5, wherein the upper end face of the conductive pillar is flush with or lower than the upper end face of the voice coil, the distance between the upper end face of the conductive pillar and the upper end face of the voice coil is a first distance L1, the distance between the upper end face of the central magnetic portion 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 a first diameter D1, the diameter of the part of the conductive column located in the through hole is a second diameter D2, and the second diameter D2 is smaller than or equal to 0.32 times the first diameter D1.
8. A method of manufacturing a sound generating device as claimed in any one of claims 1 to 7, comprising:
s1, providing a magnetic conduction material component, and performing punch forming on the magnetic conduction material component to form a base material bottom wall, a first base material side wall extending upwards and connected with the edge of the base material bottom wall, a base material horizontal wall connected with the top end of the first base material side wall, and a second base material side wall extending upwards and connected with the edge of the base material horizontal wall;
s2, blanking, namely, blanking the base material horizontal wall to divide the magnetic conductive material part into a bearing frame and a magnetic yoke positioned in the center of the bearing frame, wherein the first part of the base material horizontal wall forms a flange of the magnetic yoke, the second part of the base material horizontal wall forms an inner edge of the bearing frame, and a notch is formed in the position, corresponding to the flange, of the inner edge;
and S3, relatively rotating the bearing frame and the magnetic yoke to enable the flange to be staggered with the notch, and then fixing the flange on the lower end face of the edge of the bearing frame.
9. The machining method according to claim 8, wherein before the step S3, a positioning groove is punched in a direction from a lower end to an upper end on an inner edge, and in the step S3, the flange is fitted into the positioning groove.
10. The machining method according to claim 9, wherein a protruding step structure is formed at an inner edge portion at the positioning groove on an upper end surface of the inner edge.
11. A headset, characterized in that the sound-generating device according to any one of claims 1-7 is arranged in the headset.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811303054.XA CN109362022B (en) | 2018-11-02 | 2018-11-02 | Sound production device, processing method thereof and earphone |
| PCT/CN2018/125706 WO2020087756A1 (en) | 2018-11-02 | 2018-12-29 | Sounding device and processing method therefor as well as earphone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811303054.XA CN109362022B (en) | 2018-11-02 | 2018-11-02 | Sound production device, processing method thereof and earphone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109362022A CN109362022A (en) | 2019-02-19 |
| CN109362022B true CN109362022B (en) | 2020-12-11 |
Family
ID=65343992
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811303054.XA Active CN109362022B (en) | 2018-11-02 | 2018-11-02 | Sound production device, processing method thereof and earphone |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109362022B (en) |
| WO (1) | WO2020087756A1 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007148869A1 (en) * | 2006-06-23 | 2007-12-27 | Bluecom Co., Ltd. | Manufacturing method of slim type microspeaker |
| CN101682818A (en) * | 2008-05-13 | 2010-03-24 | 星电株式会社 | electroacoustic transducer |
| CN103338425B (en) * | 2013-06-03 | 2016-01-06 | 歌尔声学股份有限公司 | Microspeaker and assembly method thereof |
Family Cites Families (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3891094B2 (en) * | 2002-10-25 | 2007-03-07 | 松下電器産業株式会社 | Electroacoustic transducer with vibration function and manufacturing method thereof |
| JP4600037B2 (en) * | 2004-12-27 | 2010-12-15 | パナソニック株式会社 | Speaker |
| CN101076205B (en) * | 2006-05-16 | 2012-04-25 | 丰达电机（香港）有限公司 | Method for assembling microphone and microphone |
| JP5049883B2 (en) * | 2008-06-02 | 2012-10-17 | ホシデン株式会社 | Speaker |
| KR101042032B1 (en) * | 2009-03-11 | 2011-06-16 | 주식회사 비에스이 | Micro-speaker |
| CN201435821Y (en) * | 2009-03-20 | 2010-03-31 | 瑞声声学科技(常州)有限公司 | Sounding device with improved frame |
| CN201898604U (en) * | 2010-11-05 | 2011-07-13 | 富祐鸿科技股份有限公司 | Metal elastic wave structure of loudspeaker |
| CN202435605U (en) * | 2011-12-23 | 2012-09-12 | 常州美欧电子有限公司 | Sounder |
| CN102595284A (en) * | 2012-02-20 | 2012-07-18 | 歌尔声学股份有限公司 | Miniature electroacoustic transducer and assembly method thereof |
| CN202488628U (en) * | 2012-02-20 | 2012-10-10 | 歌尔声学股份有限公司 | Minitype electroacoustic transducer |
| CN202617340U (en) * | 2012-04-23 | 2012-12-19 | 瑞声光电科技(常州)有限公司 | Sounder |
| CN103379414A (en) * | 2012-04-27 | 2013-10-30 | 鸿富锦精密工业（深圳）有限公司 | Loudspeaker |
| CN204697265U (en) * | 2015-05-05 | 2015-10-07 | 东莞泉声电子有限公司 | High tone quality moving-coil type horn structure |
| CN207560323U (en) * | 2017-08-22 | 2018-06-29 | 瑞声科技(新加坡)有限公司 | Loud speaker |
-
2018
- 2018-11-02 CN CN201811303054.XA patent/CN109362022B/en active Active
- 2018-12-29 WO PCT/CN2018/125706 patent/WO2020087756A1/en active Application Filing
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007148869A1 (en) * | 2006-06-23 | 2007-12-27 | Bluecom Co., Ltd. | Manufacturing method of slim type microspeaker |
| CN101682818A (en) * | 2008-05-13 | 2010-03-24 | 星电株式会社 | electroacoustic transducer |
| CN103338425B (en) * | 2013-06-03 | 2016-01-06 | 歌尔声学股份有限公司 | Microspeaker and assembly method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020087756A1 (en) | 2020-05-07 |
| CN109362022A (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205622865U (en) | Speaker monomer and speaker module | |
| CN109495819B (en) | Sound production device and earphone | |
| CN101924974A (en) | Loud speaker | |
| CN204948336U (en) | Microspeaker | |
| CN204948337U (en) | Microspeaker | |
| EP2131607A2 (en) | Speaker | |
| CN209659588U (en) | Sounding device and electronic equipment | |
| CN107172547B (en) | Voice coil winding method, vibration assembly and sounder with vibration assembly | |
| JP3186398U (en) | Movable magnet transducer | |
| US10104476B2 (en) | Miniature loudspeaker | |
| KR101489765B1 (en) | Waterproof microspeaker | |
| US20130287245A1 (en) | Loudspeaker with reinforced frame | |
| CN209448890U (en) | Vibrating speaker | |
| KR101096788B1 (en) | Multi-function micro-speaker | |
| CN109040925B (en) | Speaker and earphone | |
| US20170339492A1 (en) | Miniature loudspeaker | |
| KR101552224B1 (en) | Microspeaker with side acoustic emission structure and enclosure speaker having the same | |
| CN109362022B (en) | Sound production device, processing method thereof and earphone | |
| CN109327778B (en) | Sound production device and earphone | |
| CN204929248U (en) | Moving -coil loudspeaker | |
| CN115103279A (en) | Sound production device and terminal equipment | |
| CN208821056U (en) | A kind of sounding device monomer and sounding device mould group | |
| CN201134927Y (en) | Electroacoustical converter | |
| JP2007104541A (en) | Electric/acoustic transducer | |
| KR101468629B1 (en) | Structure of diaphragm in microspeaker |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |