CN110418254B

CN110418254B - Sound production device monomer, sound production module and electronic terminal

Info

Publication number: CN110418254B
Application number: CN201810717437.5A
Authority: CN
Inventors: 程汉龙; 张成飞; 刘春发
Original assignee: Goertek Inc
Current assignee: Goertek Inc
Priority date: 2018-04-27
Filing date: 2018-07-03
Publication date: 2022-06-07
Anticipated expiration: 2038-07-03
Also published as: WO2019205656A1; CN110418254A

Abstract

The invention discloses a sound generating device single body, a sound generating module and an electronic terminal. The vibration isolation device comprises a magnetic circuit system, a vibration component and a circuit board; the magnetic circuit system comprises a magnetic yoke, and a central magnetic part and a side magnetic part which are arranged on the magnetic yoke, wherein at least one of the central magnetic part and the side magnetic part comprises a permanent magnet, a magnetic gap is formed between the central magnetic part and the side magnetic part, and a lead fixing part is arranged on one side of the side magnetic part, which is far away from the magnetic gap, of the sound generating device monomer; the circuit board is fixedly arranged in the sound generating device single body, and a bonding pad is arranged on the circuit board; the vibration subassembly includes vibrating diaphragm and voice coil loudspeaker voice coil, and the vibrating diaphragm is configured to can vibrate from top to bottom in sound generating mechanism monomer, and the one end of voice coil loudspeaker voice coil is connected on the vibrating diaphragm, and the other end stretches into in magnetic gap to magnetic circuit, has drawn forth the lead wire on the voice coil loudspeaker voice coil, and the lead wire is walked around limit magnetism portion and is passed the lead wire mounting from the side of limit magnetism portion, and the lead wire mounting is configured to, at least in sound generating mechanism monomer direction of height, from the upside and the downside restriction lead wire of lead wire to improve the reliability of lead wire.

Description

Sound production device monomer, sound production module and electronic terminal

Technical Field

The invention relates to the field of electroacoustic conversion, in particular to a single sounding device; the invention also relates to a sound production module and an electronic terminal applying the sound production monomer.

Background

Sound generators are important acoustic components in electronic devices, which are a type of transducer device that converts electrical signals into acoustic signals. The prior art sound generating device includes a housing, and a magnetic circuit system and a vibration assembly disposed in the housing.

The moving-coil sound generating device is widely applied to consumer electronic products, and the working mode of the moving-coil sound generating device can meet the requirements of a loudspeaker and a receiver of the electronic products. However, due to the structural characteristics of the moving-coil sound generating device, the problems of polarization of the voice coil and the diaphragm and the connection of the lead of the voice coil are difficult to solve. Two voice coil wires of a voice coil of the moving-coil sound generating device need to be led out from the voice coil and connected to a bonding pad, and the lead wires can generate traction acting force on the voice coil and can interfere vibration of the voice coil to a certain extent. The voice coil risks tearing the voice coil leads apart when vibrating. Moreover, the position of the lead wire led out from the voice coil and the extending shape of the lead wire can affect the vibration of the voice coil, so that the vibration system is asymmetric, and finally the voice coil is polarized. In some improvement schemes in the prior art, the performance of the sound generating device cannot meet the requirement due to the fact that the vibration characteristic is sacrificed or the BL value is not high.

In some improved prior art solutions, a structure for carrying and connecting the voice coil wire is provided in the moving coil type sound generating apparatus. However, the voice coil wire still has problems such as vibration floating, adhesive debonding, and detachment from the support structure. Moreover, the suspension height of the voice coil wire in the single sounding device is not easy to control.

Therefore, there is a need for an improved moving coil sound generating device that reduces the risk of a broken voice coil lead or a break from an electrical connection; or, the polarization phenomenon which may be generated when the voice coil and the diaphragm work is suppressed.

Disclosure of Invention

The invention aims to provide a new technical scheme of a single sound generating device.

According to a first aspect of the present invention, there is provided a sound generating unit comprising a magnetic circuit system, a vibration assembly and a circuit board;

the magnetic circuit system comprises a magnetic yoke, and a central magnetic part and a side magnetic part which are arranged on the magnetic yoke, wherein at least one of the central magnetic part and the side magnetic part comprises a permanent magnet, a magnetic gap is formed between the central magnetic part and the side magnetic part, and a lead fixing part is arranged on one side of the side magnetic part, which is far away from the magnetic gap, of the sound generating device monomer;

the circuit board is fixedly arranged in the sound generating device single body, and a welding disc is arranged on the circuit board;

the vibration component comprises a vibration diaphragm and a voice coil, the vibration diaphragm is configured to be capable of vibrating up and down in the single sound generating device, one end of the voice coil is connected to the vibration diaphragm, the other end of the voice coil extends into a magnetic gap of a magnetic circuit system, a lead is led out of the voice coil, the lead bypasses a side magnetic part from the side surface of the side magnetic part and penetrates through the lead fixing part, the lead fixing part is configured to limit the lead from the upper side and the lower side of the lead at least in the height direction of the single sound generating device, and the lead is electrically connected with the bonding pad.

Optionally, the lead fixing member includes a first member extending toward the yoke and a second member extending toward the diaphragm, the first member and the second member are disposed opposite to each other, and a gap is left between the first member and the second member, through which the lead passes.

Optionally, the lead wire fixing member has a through hole therein, the through hole being penetrated by the lead wire.

Optionally, the edge magnetic part includes an edge magnet and an edge magnetic conductive plate, and the edge magnetic conductive plate is covered on the edge magnet;

a cushion table is formed on one side of the edge magnet, which is far away from the magnetic gap, and the edge magnetic conductive plate is provided with a bent edge extending to one side of the edge magnet, which is far away from the magnetic gap;

or the magnetic yoke is provided with a pad platform extending to one side of the side magnet far away from the magnetic gap, and the side magnetic conductive plate is provided with a bent edge extending to one side of the side magnet far away from the magnetic gap;

the cushion table and the flange serve as the second member and the first member, respectively.

Optionally, the lead fixing element is bonded or injection-molded to a side of the side magnetic part away from the magnetic gap.

Optionally, the lead mount is an elastic member.

Optionally, the first and/or second component is a resilient member.

Optionally, the top surface of the first member and/or the second member includes a top plane, the first member and/or the second member is formed with first inclined surfaces at both sides of the top plane in a length direction of the side magnetic part, and the lead is fixed at the top plane.

Optionally, the side magnetic part is formed with an opening at a position corresponding to a lead wire led out from the voice coil, the lead wire extends from the opening in a winding manner to the outer side of the side magnetic part, and a wire segment extending from the voice coil to the lead wire fixing part is suspended in the single sound generating device.

Optionally, four leads are led out on the voice coil, wherein the leading-out positions of the two leads are located on one side of the voice coil, the leading-out positions of the other two leads are located on the other side of the voice coil, two lead fixing parts are arranged on one side of the magnetic gap far away from the side of the side magnetic part, and the two leads on the same side of the voice coil extend through the same lead fixing part.

Optionally, an edge portion of the diaphragm is fixed above the edge magnetic portion;

the projection of the diaphragm in the vibration direction thereof is located within the outer contour of the magnetic circuit system.

The invention also provides a sounding module, which comprises a module shell and the sounding device monomer arranged in the module shell.

Another aspect of the present invention provides an electronic terminal, which includes a terminal housing, and the sound generating unit mounted in the terminal housing, or the sound generating module mounted in the terminal housing.

According to one embodiment of the disclosure, the connection mode of the lead in the sound generating device single body is improved, and the connection reliability of the lead is improved.

Other features and advantages of the present invention 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 isometric view of the internal structure of a single sound generator provided by an embodiment of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1;

FIG. 3 is a partial side sectional view of the single sound generator shown in FIG. 2;

fig. 4 is a side sectional view of the internal structure of a sound emitting device unit according to an embodiment of the present invention.

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, it need not be discussed further in subsequent figures.

The invention provides an improved sound generating device single body which comprises a magnetic circuit system, a vibration assembly and a circuit board. The single sounding device can be applied to sounding modules and electronic terminals.

As shown in fig. 1, the magnetic circuit system includes a magnetic yoke, and a central magnetic portion and a side magnetic portion disposed on the magnetic yoke, the side magnetic portion being disposed around the central magnetic portion, and a gap is left between the side magnetic portion and the central magnetic portion, and the gap is used to form a magnetic gap in the magnetic circuit system. At least one of the central magnetic part and the side magnetic part contains a permanent magnet. The center magnetic part and the side magnetic parts form a magnetic field with uniform center at the magnetic gap for driving the vibration component to vibrate. The invention does not limit the specific structural forms of the central magnetic part and the edge magnetic part, and the central magnetic part and the edge magnetic part can be formed by combining different parts according to the structure and performance requirements of a product in practical application. For example, in the embodiment shown in fig. 3 and 4, the central magnetic portion includes a central magnet and a central magnetic plate 14, and the side magnetic portion includes a side magnet 12 and a side magnetic plate 13. In other embodiments, the central magnetic portion may be formed by a T-shaped magnet, and the side magnetic portions are formed by annular magnetic conductive members sleeved around the T-shaped magnet. In particular, the magnetic circuit system is provided with a lead wire fixing member 101 on the side of the side magnetic part far away from the magnetic gap, and the lead wire fixing member 101 is used for carrying, fixedly connecting a lead wire 22 extending to or extending from the lead wire fixing member 101.

As shown in fig. 1, the circuit board 3 is fixedly disposed in the sound generating unit, and the circuit board 3 has a pad 31. The circuit board 3 is used for transmitting the sound signal to the vibration assembly, and then the vibration assembly generates vibration and sound.

The vibration component comprises a vibrating diaphragm and a voice coil, one end of the voice coil is connected to the vibrating diaphragm, and the edge of the vibrating diaphragm can be fixed inside the sound generating device monomer. The vibrating diaphragm hangs the voice coil loudspeaker voice coil in sound generating mechanism monomer, and the one end that the voice coil loudspeaker voice coil kept away from the vibrating diaphragm can stretch into in the magnetic gap that magnetic circuit formed. The diaphragm can vibrate up and down in the single sound generating device along the longitudinal direction of the single body under the driving of the voice coil. As shown in fig. 1-4, a lead 22 is led out from the voice coil 21, the lead 22 is used for guiding a voice signal into the voice coil 21, and the lead 22 is electrically connected with a pad 31 on the circuit board 3 to form signal conduction. The lead 22 from the voice coil 21 does not extend straight directly to the circuit board 3 in the region of the land 31. In the present invention, the voice coil 21 is located inside the side magnetic part and outside the center magnetic part. The lead 22 is led out from the voice coil 21, and then extends to the side of the side magnetic part far away from the magnetic gap. The lead fixing part is arranged to limit the height position of the lead in the sound generating device monomer from the upper side and the lower side of the lead at least along the vertical vibration direction of the vibrating diaphragm; that is, the position of the lead is limited from both the upper and lower sides in the height direction of the sound generating device alone. The phenomenon that the line segment of the lead fixed in the single sound generating device floats up and down and collides with the vibration of the vibrating diaphragm is avoided.

Preferably, the lead 22 is routed from the side of the edge magnetic part to the periphery of the edge magnetic part, rather than from the top of the edge magnetic part. The edge magnetic part can be provided with an opening, a gap and other structures for leading wires to pass through for winding, and the structure of the edge magnetic part is not limited by the invention. Further, the lead 22 extends into the lead mount 101 located at the periphery of the side magnetic portion, and then is electrically connected to the pad 31. The lead 22 may be fixedly connected to the lead fixing member 101 by bonding, welding, or the like. The lead attachment 101 has a slit, perforation or other structure therein to allow the lead 22 to pass through the lead attachment 101. The lead holder 101 holds the lead 22 by sandwiching the lead 22 by a slit or by radial restraint of a perforation. At least, the lead wire fixing member can play a role of limiting a position from upper and lower sides of the lead wire.

The technical scheme provided by the invention provides the lead fixing piece which plays roles of fixing connection and limiting position for the lead which is led out from the voice coil to the line section which is electrically connected with the bonding pad. Compared with the prior art, the fixed connection of lead wire in the sound generating device monomer is more stable, and the height of lead wire is effectively limited through the radial limiting action that the lead wire mounting applyed partial line section of lead wire. Furthermore, the lead is not easy to cause the problems of lead wire breakage, fluctuation, separation from the bonding pad, dislocation and the like due to the vibration of the voice coil, and the stability of the lead is obviously improved.

On the other hand, the lead is led out from the voice coil and then wound to the periphery of the side magnetic part, the extending distance is longer, and the elastic deformation amount is larger. Therefore, the pulling force of the lead wire on the voice coil is relatively reduced, and accordingly, the defects of lead wire breakage and the like are not easily caused when the voice coil vibrates. The application reliability of the single sounding device is higher.

Preferably, the lead fixing piece can comprise a first part extending towards the direction of the magnetic yoke and a second part extending towards the direction of the diaphragm, namely the lead fixing piece can limit the lead by the combined action of the two parts. As shown in fig. 2-4, the first member 1011 and the second member 1012 are disposed opposite to each other with a gap therebetween through which the lead 22 passes. The clamping action between the first member 1011 and the second member 1012 holds the lead 22 in place in the gap without the appearance of floating up and down. The invention does not limit how the first component and the second component are formed or arranged in the single sound generating device, and can be designed according to the requirements of practical application.

In another alternative embodiment, the lead fixing element may have a through hole therein, and the length of the through hole may match the length of the side magnetic part for receiving the lead. The lead wire passes through the through hole, and the lead wire section in the through hole is limited by the position of the through hole, so that the problems of fluctuation, wire disconnection, wire breakage and the like can be avoided. The present invention does not limit how the lead fixing portion is formed with the through hole, and the through hole may be formed directly in one integral member, or may be formed by engaging two members with each other and forming a groove on the surfaces of the engaged members.

In the embodiment shown in fig. 2 to 4, the magnetic circuit system may include an edge magnet 12 and an edge magnetic plate 13, as shown in fig. 3, the edge magnetic plate 13 is disposed on the edge magnet 12 in a covering manner, that is, the edge magnetic plate 13 is disposed to overlap the edge magnet 12. The edge magnetic plate 13 shown in fig. 3 is located below the edge magnet 12, and the edge magnetic plate 13 described in the present invention is also covered on the edge magnet 12. A pad is formed on the side of the edge magnet 12 remote from the magnetic gap, and the pad constitutes the second member 1012. The pad may be further protruded from the outer side surface of the edge magnet 12 to the outer side of the edge magnet, or may be formed in other forms, which is not limited by the present invention. Preferably, the top surface of the pad is offset from the top surface of the edge magnet 12, so that the pad can more accurately position the leads. Further, the edge magnetic plate 13 has a bent edge extending to a side of the edge magnet 12 away from the magnetic gap, and the bent edge extends to surround the outer side surface of the edge magnet 12. The end face of the bent edge may be used to form the first member 1011, and the lead wire 22 drawn from the voice coil 21 may be wound to the outside of the edge magnet 12 and inserted into the gap between the pedestal and the bent edge. The pad platform and the bent edge are combined to form the lead fixing piece.

Alternatively, in another similar embodiment, the yoke has the above-mentioned pad extending to the side of the edge magnet away from the magnetic gap, the edge magnetic plate has a bent edge extending to the side of the edge magnet away from the magnetic gap, and the second part and the first part are respectively formed by the yoke and the edge magnetic plate.

Alternatively, the edge magnetic portion may include two or four edge magnets 12 and edge magnetic plates 13 in total, wherein the lead fasteners may be formed only on the peripheries of the two edge magnets 12 and the edge magnetic plates 13. The invention does not limit the specific structure of the side magnet part, including several side magnets and side magnetic conducting plates, which side magnets and side magnetic conducting plates are provided with lead wire fixing parts on the periphery. In particular, the sound-emitting device can be configured according to the requirements of the performance and shape of the sound-emitting device. In the embodiment shown in fig. 1 and 2, the side magnetic part includes four side magnets 12 and four side magnetic conductive plates 13, the four side magnets 12 enclose an approximately rectangular structure, and an opening is formed between two adjacent side magnets 12 to facilitate the lead 22 to be led out from the inside to the outside of the side magnetic part. The outer sides of the two shorter side magnets 12 and the side magnetic conductive plate 13 which are symmetrically distributed are provided with lead wire fixing pieces 101, and the outer sides of the two longer side magnets 12 are not provided with the lead wire fixing pieces 101. The lead wire 22 is led out from the voice coil 21 positioned in the magnetic gap 15, and is wound around the lead wire fixing member 101 outside the side magnets 12 through the opening between the end portions of the adjacent two side magnets 12 as shown in fig. 3 and 4.

The above embodiments have the advantages that, on the one hand, the structural features of forming the lead fixing member by the edge magnet or the edge magnetic conductive plate are simple, the processing and assembling processes are simple, and the production cost of the sound generating device monomer is not increased significantly. On the other hand, the side magnet or the side magnetic conductive plate is positioned at the outermost periphery of the whole magnetic circuit system, and the lead fixing piece is formed outside the side magnet or the side magnetic conductive plate, so that the extension length of the lead can be increased to the maximum extent, and the risk of wire breakage of the lead is reduced. And the overall structural shape and the space occupation of the single sounding device are not obviously influenced. Furthermore, the edge magnet and the edge magnetic conductive plate are all stable components fixed in the sounding device single body, and the lead fixing piece on which the lead extends is fixed, so that the stability is higher, and the problems of shaking and the like are not easy to occur.

In another alternative embodiment, as shown in fig. 4, a separate lead wire fixing member 101 is directly disposed on the periphery of the side magnet 12 and the side magnetic conductive plate 13. The lead wire fixing member 101 may be attached, adhered, or fixed to the outer surfaces of the edge magnet 12 and the edge magnetic conductive plate 13 by injection molding, and the present invention is not limited to a specific connection manner. Further, the lead fixing portion 101 may be divided into the first member 1011 and the second member 1012 which are independent from each other, or the first member 1011 and the second member 1012 which are connected to each other, which is not limited in the present invention. The first member 1011 and the second member 1012 are shown in fig. 4 as being independent of each other and having no connection. While there is an area of interconnection between the first member 1011 and the second member 1012 as shown in figure 2.

In addition, for embodiments where the lead holder 101 is perforated to accommodate the lead, the lead holder may be a unitary structure with perforations. The lead wire fixing member 101 may be integrally attached to the outer surface of the edge magnetic portion.

Preferably, the lead fixing member may be an elastic member, and when the lead is drawn by the voice coil and tends to move relatively, the elastic lead fixing member can absorb vibration of the lead through elastic deformation, so as to protect the lead. Furthermore, the contact between the elastic piece and the lead is flexible contact, so that the phenomena of rigid collision, friction and the like between the lead fixing piece and the lead are avoided, and the problems of damage, disconnection and the like of the lead are further reduced. Alternatively, the lead fixing member may be made of foam, elastic rubber, or the like, and then fixedly connected with the edge magnetic portion by adhesive bonding or injection molding.

In embodiments where the lead attachment member is divided into a first member and a second member, one of the members may be a spring member, while the other member may still be made of an edge magnet or an edge magnetic plate or other member that does not have good elastic deformability. For example, the first member is an elastic member, the second member is not an elastic member, and end surfaces of the first member and the second member are sandwiched with each other to regulate the position of the lead. Or alternatively, both the first and second parts are resilient members. The present invention is not limited to the use of elastic members.

Alternatively, in the embodiment where the lead fastener is divided into the first part and the second part, the first part 1011 and the second part 1012 may include a top plane, as shown in fig. 1 and 2, for contacting with the lead, fastening and clamping the lead. The top plane of the lead wire fixing member 101 extends along the longitudinal direction of the side magnetic part. The edge magnets 12 shown in fig. 1 and 2 are each rectangular in configuration, with the top planes of the first and

second members

1011, 1012 extending along the long axis of the rectangle. The portion of the lead 22 that is wound outside the edge magnetic part is also sandwiched between the top planes of the first and second members along the length direction of the edge magnetic part. In another embodiment, for example, if the edge magnetic part is not rectangular but circular arc-shaped, the longitudinal direction can be understood as a direction extending along the circular arc.

In particular, the top surface of the first part and/or the second part further comprises a first inclined surface. As shown in fig. 1 and 2, the first member 1011 further includes a first inclined surface 1013, and the first inclined surface 1013 is located on both sides of the top plane along the longitudinal direction of the edge magnetic part. The top plane is located at the middle position and the highest position of the top surface on the first component and/or the second component, the first inclined planes are located on two sides of the top plane, and the height of the first inclined planes is gradually reduced. The leads 22 may be in contact with, and fixedly connected to, at least the top plane. The region of the lead corresponding to the first inclined surface 1013 may be suspended from the first inclined surface 1013 or attached or connected to the first inclined surface 1013, which is not limited by the present invention. If the lead is not attached or connected to the first inclined surface, the suspended portion can swing along with the vibration of the voice coil. This feature extends the length of the lead that can swing, reducing the force of pulling each other between the lead and the voice coil. If the lead is attached or connected with the first inclined surface, the connection length of the lead and the lead fixing piece can be increased, the stability of the lead is improved, and the problems of disconnection, dislocation and separation of the lead from a bonding pad are solved. Whether the specific lead is connected with the first inclined surface or not can be selected according to the practical application condition.

In the embodiment in which the first inclined surface 1013 is abutted to both sides of the top plane in the longitudinal direction of the edge magnet portion, the lead wire 22 passes through the inclined surface on the lead wire fixing member 101 and then is connected to the top plane regardless of which side of the edge magnet portion is wound around the periphery of the edge magnet 12 from both ends of the edge magnet portion. By such a preferable design of the top portion of the first member and/or the second member, it is possible to improve the adaptability of the lead fixing portion to practical use and to improve the reliability of the lead 22.

Preferably, the lead is adhesively connected with the top surface of the lead fixing member through damping glue. The bonding form of damping glue belongs to flexonics, and the lead wire still can have certain floating capacity in the top surface of lead wire mounting relatively under the bonding effect that the damping was glued. When the voice coil vibrates, the lead can vibrate along with the voice coil to a certain extent, and the line segment of the lead connected to the lead fixing piece can still slightly float under the action of the damping glue. Like this, prevent on the one hand that the lead wire from receiving too big traction force and taking place the broken string, on the other hand damping is glued and can be absorbed the vibration on the lead wire for be connected to the lead wire line segment of pad can not take place the vibration, and the electric connection reliability obtains showing and promotes. Further, in the above-mentioned embodiment where the top surface of the first component and/or the second component includes the inclined surface and the top plane, if the lead is suspended on the inclined surface, the damping glue may be coated between the inclined surface and the lead, so as to enhance the performance of the lead in buffering and absorbing vibration.

Preferably, the side magnetic part is formed with an opening at a position corresponding to a lead wire drawn out of the voice coil. As shown in fig. 1 to 3, the openings are formed between the end portions of two adjacent linear edge magnets 12. The lead wire 22 extends to the outside of the edge magnet portion 12 while being wound and bent from the opening, and is further attached to the lead wire fixing member 101 outside the edge magnet portion 12. Through this kind of design, can save space on the one hand, on the other hand, effectively prolonged the unsettled length of lead wire from the voice coil loudspeaker voice coil to the line segment between the lead wire mounting.

Optionally, four lead wires are led out from the voice coil, wherein the lead-out positions of the two lead wires are located on one side of the voice coil, and the lead-out positions of the other two lead wires are located on the other side of the voice coil. And one side of the side magnetic part of the sound generating device monomer, which is far away from the magnetic gap, is provided with two lead fixing pieces. For example, the voice coil is integrally formed by winding two voice coil wires in a combined manner, and two ends of the two voice coil wires are respectively used as four lead wires which are led out. The voice coil is integrally wound into a rectangular annular structure, wherein two lead wires are led out from one short side of the voice coil, and the other two lead wires are led out from the other short side of the voice coil. Further, the two leads located on the same side of the voice coil extend to the same lead fixing member, and the two leads may surround the side magnetic portion for forming the lead fixing member, which is not limited in the present invention.

So, the wire winding of voice coil loudspeaker voice coil adopts two voice coil loudspeaker voice coil lines to twine jointly, and two voice coil loudspeaker voice coil lines are parallelly connected together, and two lead wires are parallelly connected like this and can be under the prerequisite of same resistance, and more thin than the line footpath of single line for voice coil loudspeaker voice coil thickness is thinner, and the magnetic gap can be narrower, has higher BL value, and then improves the sensitivity of vibration system, improves the free vocal performance of sound production.

Optionally, the sound generating device is of a rectangular structure as a whole, as shown in fig. 1 and 2, the edge magnetic part is four linear edge magnetic parts, and the circuit board 3 is overlapped with the edge magnetic parts. Specifically, the positions of the lands 31 on the circuit board 3 are located at both ends of the edge magnetic portion having the wire fixing member 101. Thus, the lead 22 can be naturally routed to the pad 31 after passing through the lead fixing member 101, thereby facilitating the electrical connection. Alternatively, as shown in fig. 1 and 2, two leads 22 are carried on one lead fixing member 101. The ends of the two leads 22 are connected to the pads 31 at the two ends of the linear edge magnetic portion, respectively, and the directions of the two leads 22 extending in the circumferential direction are opposite to each other.

Alternatively, in order to make the magnetic induction lines of the magnetic circuit system gather in the vicinity of the magnetic gap 15, the central magnetic portion may include a central magnet and a central magnetic conductive plate 14, and the central magnetic conductive plate 14 is covered on the central magnet to gather the magnetic lines of force. The center magnetic conductive plate 14 may be fixed to the core magnetic portion by bonding, for example. The edge magnetic part can comprise an edge magnet and an edge magnetic conduction plate 13, and the edge magnetic conduction plate 13 is covered on the edge magnet. In other embodiments, the edge magnetic conductive plate may also adopt an integrated ring structure, and is adhered to the surfaces of the plurality of edge magnets.

In particular, the sound generating device single body provided by the invention does not have a shell for bearing each part, and the magnetic circuit system per se forms the main structure of the sound generating device single body. The vibrating diaphragm is exposed at the top of the sound generating device, the edge of the vibrating diaphragm is fixed above the edge magnetic part, and the voice coil is connected to the central area of the vibrating diaphragm. The projection of the diaphragm in its own vibration direction lies within the outer contour of the magnetic circuit. Through the suspension effect of the vibrating diaphragm, one end, far away from the vibrating diaphragm, of the voice coil can be suspended in the magnetic gap. The outer surface of the magnetic circuit system is directly exposed outside, and the single sound generating device can be directly assembled in the sound generating device module or the electronic terminal through the magnetic circuit system without additionally configuring a shell.

When the sounding unit is applied, the sounding unit can be directly arranged in the module shell to form a sounding module. The sounding unit can also be directly installed in the terminal shell to form the electronic terminal. Or in the form of a sound module installed in the terminal housing to form an electronic terminal, which will not be described in detail herein. The invention provides a sound production module, which comprises a module shell and the sound production device single body, wherein the sound production device single body is arranged in the module shell. The invention also provides an electronic terminal which comprises a terminal shell, wherein the terminal can be internally provided with a sound generating device monomer or a sound generating module bearing the sound generating device monomer.

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

1. A single sounding device is characterized by comprising a magnetic circuit system, a vibration assembly and a circuit board;

the vibration assembly comprises a vibration diaphragm and a voice coil, the vibration diaphragm is configured to be capable of vibrating up and down in the sound generating device single body, one end of the voice coil is connected to the vibration diaphragm, the other end of the voice coil extends into a magnetic gap of a magnetic circuit system, a lead is led out of the voice coil, the lead bypasses a side magnetic part from the side surface of the side magnetic part and passes through the lead fixing piece, the lead fixing piece is configured to limit the lead from the upper side and the lower side of the lead at least in the height direction of the sound generating device single body, and the lead is electrically connected with the bonding pad;

the side magnetic part is provided with an opening at a position corresponding to a lead wire led out from the voice coil, the lead wire extends to the outer side of the side magnetic part in a winding manner from the opening, and a wire section extending from the voice coil to the lead wire fixing part is suspended in the single sound generating device.

2. The single sound generating device according to claim 1, wherein the lead mount comprises a first member extending toward the yoke and a second member extending toward the diaphragm, the first member and the second member being disposed opposite to each other, and a gap is left between the first member and the second member, and the gap allows the lead to pass through.

3. The single sound generator as claimed in claim 1, wherein the lead wire fixing member has a through hole therein, and the through hole is for the lead wire to pass through.

4. The single sound generating device according to claim 2, wherein the edge magnetic part comprises an edge magnet and an edge magnetic conductive plate, and the edge magnetic conductive plate is covered on the edge magnet;

or the magnetic yoke is provided with a cushion platform extending to one side of the side magnet far away from the magnetic gap, and the side magnetic conductive plate is provided with a bent edge extending to one side of the side magnet far away from the magnetic gap;

the cushion table and the beads serve as the second member and the first member, respectively.

5. The single sound generating device according to claim 1, wherein the lead wire fixing member is bonded or injection-molded to a side of the side magnetic portion away from the magnetic gap.

6. The single sound emitting device of claim 1, wherein the lead wire fixing member is an elastic member.

7. The sound generating device as claimed in claim 2, wherein the first and/or second member is/are resilient.

8. The single sound generating device according to claim 2, wherein the top surface of the first member and/or the second member includes a top plane, the first member and/or the second member is formed with first inclined surfaces at both sides of the top plane in a length direction of the side magnetic portion, and the lead is fixed at the top plane.

9. The single sound generating device according to claim 1, wherein four leads are led out from the voice coil, two of the leads are led out at one side of the voice coil, the other two leads are led out at the other side of the voice coil, two lead fixing members are disposed at one side of the side magnetic part away from the magnetic gap, and the two leads at the same side of the voice coil extend through the same lead fixing member.

10. The single body of claim 1, wherein,

the edge part of the vibrating diaphragm is fixed above the side magnetic part;

11. A sound emitting module comprising a module housing and the sound emitting device as claimed in any one of claims 1-10 mounted within the module housing.

12. An electronic terminal, characterized by comprising a terminal housing, and the sound generating device single body according to any one of claims 1 to 10 mounted in the terminal housing, or the sound generating module according to claim 11 mounted in the terminal housing.