A dual-diaphragm receiver and electronic device

Abstract

This invention discloses a dual-diaphragm receiver and electronic device. The dual-diaphragm receiver includes a housing assembly, a first diaphragm assembly, a second diaphragm assembly, an armature, and an electromagnetic drive device. The first and second diaphragm assemblies divide the internal cavity into a first front cavity, a second front cavity, and a rear cavity located between the first and second front cavities. The armature is disposed in the rear cavity and includes a first moving plate and a second moving plate arranged opposite each other, both with one end suspended. The first moving plate is connected to the first diaphragm assembly, and the second moving plate is connected to the second diaphragm assembly via a transmission connection. The electromagnetic drive device is disposed in the rear cavity and connected to the housing assembly. Both the first and second moving plates pass through the electromagnetic drive device and are driven to vibrate by the electromagnetic drive device. The dual-diaphragm receiver of this invention has two vibrating diaphragm assemblies that generate sound, resulting in higher sound pressure output, less vibration during operation, and more stable operation.

Description

Technical Field

[0001] This invention relates to an acoustic device, and more particularly to a dual-diaphragm receiver and electronic device. Background Technology

[0002] A receiver, such as a balanced armature receiver, is an electroacoustic device that converts audio electrical signals into sound signals. It is widely used in electronic devices such as hearing aids, headphones, and telephones.

[0003] In the prior art, a balanced armature receiver includes an ferrite magnet assembly, a coil, a U-shaped reed, and a diaphragm assembly. One of the two pieces of the U-shaped reed is fixedly connected to the ferrite magnet assembly, while the other piece is suspended at one end. When the coil is energized, the suspended piece at the end of the reed is polarized and reciprocates under the magnetic field of the ferrite magnet assembly. At the same time, the suspended piece at the end of the reed is connected to the diaphragm assembly through a connecting rod, thereby driving the diaphragm assembly to vibrate and generate sound by blowing air.

[0004] A typical balanced armature receiver contains one diaphragm assembly, while some balanced armature receivers contain two diaphragm assemblies, both of which are driven simultaneously by the same reed body.

[0005] Because the two diaphragm assemblies are driven by a single sheet, the sheet bears a large load during vibration. Furthermore, the two diaphragm assemblies in a balanced armature receiver can only vibrate simultaneously in the same direction. On one hand, independent control of the two diaphragm assemblies is not possible, resulting in limited acoustic performance and failing to meet the needs of applications requiring high or specific acoustic characteristics. On the other hand, the co-directional vibration of the two diaphragm assemblies exacerbates the overall vibration of the receiver, negatively impacting its reliable operation and acoustic performance.

[0006] Therefore, it is necessary to improve the existing technology to overcome the aforementioned defects. Summary of the Invention

[0007] The purpose of this invention is to provide a dual-diaphragm receiver and electronic device, which can produce sound through two diaphragm assemblies.

[0008] To achieve the above-mentioned objectives, the present invention provides a dual-diaphragm receiver, comprising:

[0009] The housing assembly has an internal cavity;

[0010] A first diaphragm assembly is disposed within the inner cavity and connected to the housing assembly;

[0011] The second diaphragm assembly is disposed in the inner cavity and connected to the housing assembly. The first diaphragm assembly and the second diaphragm assembly divide the inner cavity into a first front cavity, a second front cavity, and a rear cavity located between the first front cavity and the second front cavity.

[0012] An armature, disposed within the rear cavity, includes a first moving plate and a second moving plate disposed opposite to each other, both the first and second moving plates having one end suspended; the first moving plate is drive-connected to the first diaphragm assembly, and the second moving plate is drive-connected to the second diaphragm assembly; and...

[0013] An electromagnetic drive device is disposed in the rear cavity and connected to the housing assembly. The first moving plate and the second moving plate are both disposed in the electromagnetic drive device, and the electromagnetic drive device is used to drive the first moving plate and the second moving plate to vibrate.

[0014] Furthermore, the electromagnetic drive device includes a magnet assembly and a coil. The magnet assembly includes a first magnetic pole pair and a second magnetic pole pair. Both the first magnetic pole pair and the second magnetic pole pair include two opposing magnetic poles with different polarities. The first moving plate and the second moving plate are respectively disposed between the two magnetic poles of the first magnetic pole pair and the second magnetic pole pair. The coil is sleeved on the armature.

[0015] Furthermore, the electromagnetic drive device includes an iron plate assembly, the first magnetic pole pair and the second magnetic pole pair are disposed on the iron plate assembly, the polarity of the magnetic poles of the first magnetic pole pair located on both sides of the first moving plate is the same as the polarity of the magnetic poles of the second magnetic pole pair located on both sides of the second moving plate, and the first moving plate and the second moving plate are magnetically connected.

[0016] Furthermore, both the first and second moving plates are fitted with at least one of the coils, and the first and second moving plates are magnetically connected to the edge iron assembly; or,

[0017] Both the first and second moving plates are fitted with at least one of the coils, and the first and second moving plates are not magnetically connected to the edge iron assembly; or,

[0018] Only one of the first moving plate and the second moving plate is fitted with at least one of the coils, and the first moving plate and the second moving plate are non-magnetically connected to the edge iron assembly.

[0019] Furthermore, the frequency response curves output by the first diaphragm assembly and the second diaphragm assembly are different.

[0020] Furthermore, the electromagnetic drive device includes an edge iron assembly connected to the magnet assembly. The edge iron assembly includes an intermediate magnetic conductor and a first magnetic conductor and a second magnetic conductor respectively connected to both sides of the intermediate magnetic conductor. A first receiving hole is formed between the intermediate magnetic conductor and the first magnetic conductor, and a second receiving hole is formed between the intermediate magnetic conductor and the second magnetic conductor.

[0021] Furthermore, the magnet assembly includes a first magnet connected to the first magnetic conductive element, a second magnet connected to the intermediate magnetic conductive element, and a third magnet connected to the second magnetic conductive element. The two poles of the second magnet are respectively located in the first receiving hole and the second receiving hole. The opposite poles of the first magnet and the second magnet are arranged opposite to each other, and the opposite magnetic poles of the two magnets constitute the first magnetic pole pair. The opposite poles of the second magnet and the third magnet are arranged opposite to each other, and the opposite magnetic poles of the two magnets constitute the second magnetic pole pair.

[0022] Furthermore, the magnet assembly includes a first magnet, a second magnet, a third magnet, and a fourth magnet. The second magnet and the third magnet are respectively connected to both sides of the intermediate magnetic conductor. The first magnet is connected to the first magnetic conductor and is arranged with opposite poles to the second magnet. The opposite poles of the two magnets constitute the first magnetic pole pair. The fourth magnet is connected to the second magnetic conductor and is arranged with opposite poles to the third magnet. The opposite poles of the two magnets constitute the second magnetic pole pair.

[0023] Furthermore, the coil is connected to the magnet assembly and / or the edge iron assembly, and the electromagnetic drive device is connected to the housing assembly through the intermediate magnetic conductor.

[0024] Furthermore, the housing assembly has a positioning hole communicating with the rear cavity, and the intermediate magnetic conductor is installed in the positioning hole.

[0025] Furthermore, the housing assembly includes a first housing and a second housing disposed along its height direction, both the first housing and the second housing having portions of the positioning holes, the first housing and the second housing being connected to form the positioning holes; or,

[0026] The housing assembly includes a front housing and a rear housing arranged along its length. Both the front housing and the rear housing are provided with partial positioning holes. After the front housing and the rear housing are connected, they are assembled to form the positioning holes.

[0027] Furthermore, the housing assembly includes a first housing and a second housing, with the outer edge of the intermediate magnetic conductor clamped between the first housing and the second housing.

[0028] Furthermore, the first moving plate and the second moving plate are connected to the intermediate magnetic conductor.

[0029] Furthermore, the armature includes a connecting portion integrally formed with the first moving plate and the second moving plate, and at least one of the first moving plate, the second moving plate, and the connecting portion is connected to the coil and / or the housing assembly.

[0030] Furthermore, the dual-diaphragm receiver also includes an armature bracket connected to the armature, the armature bracket being connected to the coil and / or the housing assembly.

[0031] Furthermore, the first and second moving plates are connected to the armature support; or,

[0032] The armature includes a connecting portion integrally formed with the first moving plate and the second moving plate, and at least one of the connecting portion, the first moving plate, and the second moving plate is connected to the armature support.

[0033] Furthermore, the housing assembly is provided with a first sound outlet hole communicating with the first front cavity and a second sound outlet hole communicating with the second front cavity, and the dual-diaphragm receiver also includes a sound outlet tube connected to the housing assembly and covering the first sound outlet hole and the second sound outlet hole.

[0034] Furthermore, both the first diaphragm assembly and the second diaphragm assembly include an annular outer frame connected to the housing assembly, a vibrating plate disposed within the outer frame and hinged at one end to the outer frame, and a thin film connected to the outer frame and the vibrating plate. The thin film at least covers the gap between the vibrating plate and the outer frame. The first moving plate and the vibrating plate of the first diaphragm assembly, as well as the second moving plate and the vibrating plate of the second diaphragm assembly, are connected by connecting rods.

[0035] Furthermore, the housing assembly has a through hole communicating with the rear cavity.

[0036] Furthermore, when the first moving plate and the second moving plate vibrate simultaneously, their vibration directions are opposite.

[0037] On the other hand, the present invention provides an electronic device including a dual-diaphragm receiver as described in any of the preceding claims.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] 1. In this invention, the dual-diaphragm receiver is equipped with a first and a second moving plate, each with one end suspended, and an electromagnetic drive device for driving the vibration of the first and second moving plates. Since the first moving plate is driven by the first diaphragm assembly, and the second moving plate is driven by the second diaphragm assembly, both diaphragm assemblies can be driven to vibrate by their corresponding moving plates. The two moving plates of the armature can each drive one diaphragm assembly to vibrate, fully utilizing the armature's own structure. This facilitates more diverse vibrations of the two diaphragm assemblies, reduces the load on the moving plates, and provides more sufficient driving force.

[0040] 2. As an improvement, by setting at least one coil on the outside of both the first and second moving plates and setting the two moving plates to be magnetically connected to the front iron assembly, it is possible to achieve independent control of the moving plates inside by the coils, thereby enabling the two diaphragm assemblies to be driven independently, making the control methods of the diaphragm assemblies more diversified and increasing the acoustic performance of the dual-diaphragm receiver.

[0041] 3. As an improvement, the first and second moving plates vibrate in opposite directions when they vibrate simultaneously. Because the two diaphragm assemblies vibrate in opposite directions, the vibrations transmitted to the housing assembly are canceled out. This significantly reduces the vibration generated during the operation of the dual-diaphragm receiver, resulting in smoother and more reliable operation. This improves the acoustic performance of the dual-diaphragm receiver and reduces the impact of vibration on product performance and user experience. Furthermore, the simultaneous vibration of the two diaphragm assemblies effectively increases the sound pressure level of the dual-diaphragm receiver.

[0042] 4. As an improvement, by setting the frequency response curves of the first diaphragm assembly and the second diaphragm assembly to different forms, the full-frequency performance of the dual-diaphragm receiver can be improved, resulting in better acoustic performance. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the dual-diaphragm receiver in Embodiment 1 of the present invention.

[0044] Figure 2 yes Figure 1 The exploded view of the dual-diaphragm receiver is shown.

[0045] Figure 3 yes Figure 1 The diagram shows a cross-sectional view of a dual-diaphragm receiver.

[0046] Figure 4 This is a schematic diagram of the electromagnetic drive device, armature, and armature support in Embodiment 1 of the present invention.

[0047] Figure 5 yes Figure 4 The cross-sectional view of the structure shown.

[0048] Figure 6 yes Figure 4 The exploded view of the structure is shown.

[0049] Figure 7 This is a schematic diagram of the armature structure in Embodiment 1 of the present invention.

[0050] Figure 8 This is a schematic diagram of the connection between the armature and the armature support in Embodiment 1 of the present invention.

[0051] Figure 9 yes Figure 1 A cross-sectional view of the dual-diaphragm receiver from another angle.

[0052] Figure 10 This is a schematic diagram of the diaphragm assembly in Embodiment 1 of the present invention.

[0053] Figure 11 yes Figure 10 The diaphragm assembly shown is a cross-sectional view.

[0054] Figure 12 This is a schematic diagram of the arrangement of two sets of magnetic pole pairs in one embodiment of the present invention.

[0055] Figure 13 This is a schematic diagram of another embodiment of the arrangement of the two sets of magnetic pole pairs in this invention.

[0056] Figure 14 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 2 of the present invention.

[0057] Figure 15 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 3 of the present invention.

[0058] Figure 16 This is a schematic diagram of the armature structure in Embodiment 3 of the present invention.

[0059] Figure 17 This is a schematic diagram showing the connection between the electromagnetic drive device and the armature in Embodiment 3 of the present invention.

[0060] Figure 18 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 3 of the present invention from another angle.

[0061] Figure 19 This is a schematic diagram of the dual-diaphragm receiver in Embodiment 4 of the present invention.

[0062] Figure 20 yes Figure 19 The exploded view of the dual-diaphragm receiver is shown.

[0063] Figure 21 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 5 of the present invention.

[0064] Figure 22This is a schematic diagram of the connection between the armature and the armature support in Embodiment 5 of the present invention.

[0065] Figure 23 This is a schematic diagram of the electromagnetic drive device, armature, and armature support in Embodiment 5 of the present invention.

[0066] Figure 24 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 5 of the present invention from another angle.

[0067] Figure 25 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 6 of the present invention.

[0068] Figure 26 This is a schematic diagram of the connection between the armature and the armature support in Embodiment 6 of the present invention.

[0069] Figure 27 This is a schematic diagram of the electromagnetic drive device, armature, and armature support in Embodiment 6 of the present invention.

[0070] Figure 28 This is a cross-sectional view of the dual-diaphragm receiver of Embodiment 6 of the present invention from another angle.

[0071] Figure 29 This is a schematic diagram of the dual-diaphragm receiver in Embodiment 7 of the present invention.

[0072] Figure 30 This is a three-dimensional sectional view of the front housing, rear housing, electromagnetic drive device, and armature in Embodiment 7 of the present invention.

[0073] Figure 31 This is a schematic diagram of the connection between the armature and the rear housing in Embodiment 7 of the present invention.

[0074] Figure 32 This is a cross-sectional view of the electromagnetic drive device, armature, and armature support in Embodiment 8 of the present invention.

[0075] Figure 33 This is a schematic diagram of the connection between the armature and the armature support in Embodiment 8 of the present invention.

[0076] Figure 34 This is a schematic diagram of the structure of an electromagnetic drive device, an armature, and an armature support according to an embodiment of the present invention. The armature support is connected to the lower surface of the first moving plate.

[0077] Figure 35 yes Figure 34 A schematic diagram of the structure connecting the armature support to the armature.

[0078] Figure 36 This is a schematic diagram of the structure of an electromagnetic drive device, an armature, and an armature support according to an embodiment of the present invention. The armature support in the figure has a third arm.

[0079] Figure 37 yes Figure 36 A schematic diagram of the structure connecting the armature support to the armature.

[0080] Figure 38 This is a schematic diagram of the structure of the dual-diaphragm receiver in Embodiment 9 of the present invention.

[0081] Figure 39 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 9 of the present invention.

[0082] Figure 40 This is a schematic diagram of the electromagnetic drive device, armature, and armature support in Embodiment 9 of the present invention.

[0083] Figure 41 yes Figure 40 The exploded view of the structure shown.

[0084] Figure 42 This is a cross-sectional view of the dual-diaphragm receiver in Embodiment 10 of the present invention.

[0085] Figure 43 This is a schematic diagram of the electromagnetic drive device, armature, and armature support in Embodiment 10 of the present invention.

[0086] Figure 44 yes Figure 43 The exploded view of the structure shown.

[0087] Figure 45 yes Figure 43 The cross-sectional view of the structure shown. Detailed Implementation

[0088] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, it should be noted that, for ease of description, only the parts relevant to this application are shown in the accompanying drawings, not the entire structure. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this application.

[0089] The terms “comprising” and “having”, and any variations thereof, used in this application are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or units inherent to such process, method, product, or apparatus.

[0090] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0091] This application discloses a dual-diaphragm receiver, referenced... Figures 1 to 3 It includes a housing assembly 1, two diaphragm assemblies, an armature 4, and an electromagnetic drive device 5.

[0092] The housing assembly 1 is composed of two or more housings connected together, and has an internal cavity. The two diaphragm assemblies, the armature 4, and the electromagnetic drive device 5 are all disposed within the internal cavity. The housing assembly 1 can be made of magnetically conductive or non-magnetically conductive materials. When the housing assembly 1 is made of magnetically conductive materials, it can provide magnetic shielding. Magnetically conductive materials are preferred in applications where magnetic leakage is required.

[0093] The two diaphragm assemblies are a first diaphragm assembly 2 and a second diaphragm assembly 3. Both the first diaphragm assembly 2 and the second diaphragm assembly 3 are connected to the inner wall 1g of the housing assembly 1 and are spaced apart in the height direction, preferably arranged in parallel. The first diaphragm assembly 2 and the second diaphragm assembly 3 divide the inner cavity into a first front cavity 10, a second front cavity 11, and a rear cavity 12 located between the two front cavities. The first front cavity 10 is located between the first diaphragm assembly 2 and the top wall 1e of the housing assembly 1, the second front cavity 11 is located between the second diaphragm assembly 3 and the bottom wall 1f of the housing assembly 1, and the rear cavity 12 is located between the two diaphragm assemblies.

[0094] The armature 4 is used to vibrate under the drive of the electromagnetic drive device 5, and to drive the first diaphragm assembly 2 and the second diaphragm assembly 3 to vibrate. The armature 4 includes a first moving plate 40 and a second moving plate 41 arranged opposite each other, preferably the first moving plate 40 and the second moving plate 41 are arranged in parallel opposite each other. Both the first moving plate 40 and the second moving plate 41 are suspended at one end. The other end of the moving plate can be connected to other components, for example, it can be connected to the housing assembly 1 or the electromagnetic drive device 5, or it can be connected to both the housing assembly 1 and the electromagnetic drive device 5. The moving plate can be directly connected to the housing assembly 1 and the electromagnetic drive device 5, or it can be connected through other components (such as the connecting part 42 or the armature bracket 7 described below). In this way, a part of the armature 4 can be relatively fixed to the housing assembly 1 and the electromagnetic drive device 5, which is beneficial to the controlled vibration of the moving plate. The first moving plate 40 and the first diaphragm assembly 2, as well as the second moving plate 41 and the second diaphragm assembly 3, are all transmission connections. As a preferred embodiment, the transmission connection is achieved through a connecting rod 43, which is preferably connected to the suspended end of the moving plate.

[0095] By setting both moving plates of the armature to be suspended at one end, and the first diaphragm assembly 2 and the second diaphragm assembly 3 being driven to vibrate by the first moving plate 40 and the second moving plate 41 respectively, the structure of the armature 4 can be fully utilized. By controlling the vibration of the moving plates, the vibration of the corresponding diaphragm assembly can be controlled, making the vibration modes of the two diaphragm assemblies more diverse, and the acoustic performance of the dual-diaphragm receiver more diverse. Moreover, since the two moving plates drive their respective diaphragm assemblies to vibrate, the load on the moving plates is small during vibration, the driving force is more sufficient, and the dual-diaphragm receiver works more reliably.

[0096] In some embodiments, when the first moving plate 40 and the second moving plate 41 vibrate simultaneously, their vibration directions are opposite, i.e., they vibrate in opposite directions. When the first moving plate 40 and the second moving plate 41 vibrate in opposite directions under the drive of the electromagnetic drive device 5, the first diaphragm assembly 2 and the second diaphragm assembly 3 are driven to vibrate in opposite directions by the two connecting rods 43, thereby agitating air to produce sound. Since the two moving plates and the two diaphragm assemblies vibrate in opposite directions, the vibrations transmitted to the housing assembly 1 by the two moving plates and the two diaphragm assemblies are canceled out, which can significantly reduce the vibration generated by the dual-diaphragm receiver during operation. The dual-diaphragm receiver operates more smoothly and has better performance. At the same time, since the two diaphragm assemblies agitate air to produce sound simultaneously, the sound pressure level can be increased.

[0097] As a preferred embodiment, the vibration of the two moving plates is achieved in the following manner, such as... Figure 12 As shown, the electromagnetic drive device 5 includes a magnet assembly 52 and a coil 51. The magnet assembly 52 includes two sets of magnetic pole pairs, namely a first magnetic pole pair 5a and a second magnetic pole pair 5b. Each set of magnetic pole pairs includes two magnetic poles that are arranged opposite each other and have different polarities, that is, each set of magnetic pole pairs has the N pole and the S pole arranged opposite each other. The first moving plate 40 and the second moving plate 41 are respectively passed between the two magnetic poles of the first magnetic pole pair 5a and the second magnetic pole pair 5b. The coil 51 is sleeved on the armature 4 and is used to generate a magnetic field that polarizes the first moving plate 40 and the second moving plate 41. After the coil 51 is energized, at least the part of the first moving plate 40 located in the first magnetic pole pair 5a and the part of the second moving plate 41 located in the second magnetic pole pair 5b are polarized. When the moving plate is not polarized, it is in equilibrium between the two magnetic poles. When the portion of the first moving plate 40 and the second moving plate 41 located inside the magnetic pole pair is polarized, the magnetic pole on one side of the moving plate will exert a magnetic attraction force on it, and the magnetic pole on the other side will exert a magnetic repulsion force on it, thereby driving the moving plate to deflect to one side. Furthermore, when the polarity of the portion of the moving plate located inside the magnetic pole pair changes, the moving plate will be subjected to a reverse magnetic force, thereby deflecting to the other side. By changing the direction of the current in the coil 51, the direction of the magnetic field it generates can be changed, thereby driving the moving plate to reciprocate.

[0098] In some embodiments, the polarity of the magnetic poles of the first magnetic pole pair 5a located on both sides of the first moving plate 40 is the same as the polarity of the magnetic poles of the second magnetic pole pair 5b located on both sides of the second moving plate 41. That is, when the magnetic poles of the first magnetic pole pair 5a located on the upper and lower sides of the first moving plate 40 are N and S poles respectively, the magnetic poles of the second magnetic pole pair 5b located on the upper and lower sides of the second moving plate 41 are also N and S poles respectively. Figure 12 As shown; conversely, when the first magnetic pole pair 5a has S and N poles on the upper and lower sides of the first moving plate 40 respectively, the second magnetic pole pair 5b also has S and N poles on the upper and lower sides of the second moving plate 41 respectively, as shown. Figure 13 As shown. In these embodiments, when coil 51 is energized, at least the portions of the two moving pieces located within the magnetic pole pair are polarized. When the portions of the two moving pieces located within the magnetic pole pair are polarized to different polarities, that is, polarized to the N pole and S pole respectively, the two moving pieces are subjected to magnetic forces in opposite directions and move in opposite directions. It is understood that the number of coils 51 is not limited. For example, coil 51 can be set outside only one moving piece (the number of coils 51 wrapped around the same moving piece is not limited to one). In this case, the two moving pieces should be connected by a magnetically conductive material. Alternatively, coils 51 can be set outside both moving pieces. It is understood that the coil 51 is wrapped around the moving piece but does not contact the moving piece. A certain gap is maintained between the coil 51 and the moving piece to ensure that the moving piece has enough space to vibrate freely.

[0099] The aforementioned magnetic pole pairs can be formed by setting magnets that are positioned opposite each other, for example, as shown in the example. Figure 4 and Figure 5 As shown, the iron-clad magnet assembly includes four parallel, spaced-apart magnets, arranged from top to bottom as a first magnet 521, a second magnet 522, a third magnet 523, and a fourth magnet 524. The first magnet 521 and the second magnet 522 are arranged with opposite poles facing each other, and their two opposing poles (the N pole of the first magnet 521 and the S pole of the second magnet 522 in the figure) constitute the first pole pair 5a described above. The third magnet 523 and the fourth magnet 524 are arranged with opposite poles facing each other, and their two opposing poles (the N pole of the third magnet 523 and the S pole of the fourth magnet 524 in the figure) constitute the second pole pair 5b described above. For example, as... Figure 43 and Figure 45As shown, in some embodiments, the magnet assembly 52 includes three parallel and spaced magnets, which are, from top to bottom, a first magnet 521, a second magnet 522, and a third magnet 523. The first magnet 521 and the second magnet 522 are arranged with opposite poles facing each other, and the two opposing magnetic poles of the two magnets (the N pole of the first magnet 521 and the S pole of the second magnet 522 in the figure) constitute the first magnetic pole pair 5a mentioned above. Similarly, the second magnet 522 and the third magnet 523 are arranged with opposite poles facing each other, and the two opposing magnetic poles of the two magnets (the N pole of the second magnet 522 and the S pole of the third magnet 523 in the figure) constitute the second magnetic pole pair 5b mentioned above.

[0100] The chamfer assembly 53 is made of magnetically conductive material. All the aforementioned magnets are connected to the chamfer assembly 53, forming a magnetically conductive circuit, improving magnetic efficiency, and thus increasing the driving force on the moving plate and the sensitivity of the dual-diaphragm receiver. The chamfer assembly 53 and the magnet assembly 52 constitute a chamfer magnet assembly. The chamfer magnet assembly is connected to the housing assembly 1 via the chamfer assembly 53. The coil 51 is connected to the chamfer magnet assembly, as shown below. Figure 5 As shown, the left end face of the coil 51 is connected to the right end face of the iron-clad magnet assembly. Specifically, the coil 51 can be connected to one of the magnet assembly 52 and the iron-clad magnet assembly 53, or to both. The connection method is, for example, adhesive bonding. This allows the electromagnetic drive device 5 to be connected and fixed to the housing assembly 1 as a whole.

[0101] Armature 4 can be connected to housing assembly 1 or coil 51, or both housing assembly 1 and coil 51. The portion connected to housing assembly 1 or coil 51 is fixed relative to housing assembly 1 and coil 51; this portion is its fixing part. Typically, the fixing part and the suspended end of the moving piece are located on both sides of coil 51, so that the moving piece has a relatively long suspended length. In some embodiments, such as... Figure 16 As shown, the armature 4 includes a connecting portion 42 integrally formed with the first moving plate 40 and the second moving plate 41, and the armature 4 is generally U-shaped. The armature 4 can be connected to the housing assembly 1 by one or more of the first moving plate 40, the second moving plate 41, and the connecting portion 42, which are connected to the coil 51 and / or the housing assembly 1. In some embodiments, such as... Figure 26 As shown, the dual-diaphragm receiver also includes an armature bracket 7, which can be connected to the right end (the end opposite to the suspended end) of the first moving plate 40 and the second moving plate 41. When the armature 4 is provided with a connecting part 42, such as... Figure 8 , Figure 22 and Figure 33 As shown, the armature bracket 7 can also be connected to one or more of the connecting part 42, the first moving piece 40, and the second moving piece 41. The armature 4 is connected to the housing assembly 1 via the armature bracket 7, which connects to the coil 51 and / or the housing assembly 1.

[0102] In a preferred embodiment, the dual-diaphragm receiver further includes a sound outlet tube 6 connected to the housing assembly 1. The housing assembly 1 has a first sound outlet 13 communicating with the first front cavity 10 and a second sound outlet 14 communicating with the second front cavity 11. The sound outlet tube 6 covers the first sound outlet 13 and the second sound outlet 14, so that the sound emitted from the first sound outlet 13 and the second sound outlet 14 can be converged and emitted within the sound outlet tube 6. Since the dual-diaphragm receiver generates sound through the vibration of two diaphragm assemblies, the sound pressure level can be significantly improved.

[0103] In some embodiments, only one of the first moving piece 40 and the second moving piece 41 is fitted with the coil 51, and the first moving piece 40 and the second moving piece 41 are magnetically connected. For example, the armature 4 is integrally molded and made entirely of magnetically conductive material, or the two moving pieces are independent parts connected by an armature bracket 7 made of magnetically conductive material, thus achieving a magnetic connection between the two moving pieces. Meanwhile, the first moving piece 40 and the edge assembly 53, as well as the second moving piece 41 and the edge assembly 53, are non-magnetically connected. For example, the housing assembly 1 is made of non-magnetically conductive material, or if the housing assembly 1 is made of magnetically conductive material, the two moving pieces and the housing assembly 1 are non-magnetically connected. In this case, when the coil 51 is energized, it simultaneously polarizes the two moving pieces, and the portions of the two moving pieces located within the magnetic pole pair are polarized into opposite poles, enabling the coil 51 to simultaneously control the two moving pieces.

[0104] In some embodiments, the first moving piece 40 and the second moving piece 41, which are magnetically connected, are both fitted with coils 51, and the first moving piece 40 and the second moving piece 41 are magnetically connected to the edge assembly 53. For example, the housing assembly 1 is made of a magnetic material, and the edge assembly 53 and the two moving pieces are magnetically connected to the housing assembly 1, thereby achieving a magnetic connection between the two moving pieces and the edge assembly 53. At this time, after the coils 51 are energized, the two moving pieces each form a magnetic circuit between the housing assembly 1 and the edge assembly 53. The two coils 51 only polarize the moving pieces within them, so that the two coils 51 can independently drive the vibration of their respective fitted moving pieces. That is, the two coils 51 can independently control the vibration of the two diaphragm assemblies. In this way, the vibration mode of the diaphragm assemblies is more diverse. For example, only one diaphragm assembly can vibrate while the other does not vibrate; or the two diaphragm assemblies can vibrate alternately; or the two diaphragm assemblies can vibrate simultaneously. When the two diaphragm assemblies vibrate in opposite directions at the same time, the vibration of the dual-diaphragm receiver can be effectively reduced, making its operation more stable.

[0105] In some embodiments, the first moving piece 40 and the second moving piece 41, which are magnetically connected to each other, are both fitted with coils 51. The first and second moving pieces 40 and 41 are not magnetically connected to the edge assembly 53. Both coils 51 can simultaneously polarize the two moving pieces, causing the portions of the two moving pieces located within the magnetic pole pair to be polarized into opposite poles, thus enabling the joint driving of the two moving pieces. When both coils 51 are energized simultaneously, the driving force can be increased; alternatively, the two coils 51 can work alternately, improving the overall service life.

[0106] To improve the full-frequency performance of the dual-diaphragm receiver, in some embodiments, the frequency response curves of the first diaphragm assembly 2 and the second diaphragm assembly 3 are different. For example, the output of one diaphragm assembly is biased towards high frequencies, while the other is biased towards low frequencies, which can make the frequency response curve of the entire frequency band better, thereby improving the acoustic performance.

[0107] Understandably, since the armature 4 has two moving plates that drive the vibration of two diaphragm assemblies respectively, the acoustic performance of the moving plates can be changed by designing different moving plates. For example, one of the first moving plate 40 and the second moving plate 41 can be set to be biased towards high frequencies, while the other is set to be biased towards low frequencies, thereby achieving better full-frequency performance. By increasing the stiffness coefficient of the moving plates (e.g., increasing the thickness of the moving plates or reducing the length of the moving plates) and decreasing the dynamic mass of the moving plates, the dominant modal frequency f0 of the moving plates can be increased, resulting in better high-frequency output. Conversely, by decreasing the stiffness coefficient of the moving plates (e.g., decreasing the thickness of the moving plates or increasing the length of the moving plates) and increasing the mass of the moving plates, the dominant modal frequency f0 of the moving plates can be decreased, resulting in better low-frequency output.

[0108] The frequency response curve of the diaphragm assembly can also be changed by altering the mass of the diaphragm plate 31. Increasing the mass of the diaphragm plate 31 will reduce the high-frequency output and decrease the bandwidth; conversely, decreasing the mass of the diaphragm plate 31 will increase the high-frequency output and increase the bandwidth.

[0109] Furthermore, when coils 51 are provided on the exterior of both the first moving piece 40 and the second moving piece 41, and the coils 51 can independently control the two moving pieces, the output performance of different frequency bands of the coils 51 can be changed by adjusting the coils 51. Specifically, this can be achieved by adjusting the ratio of the resistance to the square of the number of turns of the coil 51 (DCR / N). 2 The high-frequency and low-frequency outputs corresponding to coil 51 can be adjusted. Generally, increasing the ratio of resistance to the square of the number of turns will increase the high-frequency output but decrease the low-frequency output, while decreasing the ratio will increase the low-frequency output but decrease the high-frequency output. For example, while keeping the resistance constant, reducing the number of turns of the coil can increase this ratio, while conversely, increasing the number of turns can significantly decrease this ratio.

[0110] In summary, the frequency response curve of the diaphragm assembly can be adjusted by modifying the structural parameters of the moving plate, coil 51, and the diaphragm assembly itself. By setting the two diaphragm assemblies to different frequency response curves, the outputs of the two diaphragm assemblies can be coordinated to achieve better full-frequency response and better bandwidth. In this way, the dual-diaphragm receiver has a better frequency response curve over a wider frequency band and better acoustic performance.

[0111] In some embodiments, the housing assembly 1 has a through hole 120 communicating with the rear cavity 12 to reduce the stiffness of the rear cavity and increase low-frequency output. Preferably, the housing assembly 1 has through holes 120 on both sides, and the through holes 120 on both sides are symmetrically arranged. More preferably, the through hole 120 is located near the rear end of the housing assembly 1, for example, at a position corresponding to the armature bracket 7 or the connecting portion 42.

[0112] The present invention will be further described in detail below with reference to several specific embodiments.

[0113] Example 1

[0114] like Figures 1 to 11 As shown, the dual-diaphragm receiver includes a housing assembly 1, a first diaphragm assembly 2, a second diaphragm assembly 3, an armature 4, and an electromagnetic drive device 5.

[0115] The housing assembly 1 includes a first housing 16 and a second housing 17. The first housing 16 includes an independently disposed upper cover 1a and an upper frame 1b connected to the upper cover 1a. The second housing 17 includes a second frame 1c and a lower cover 1d connected to the second housing 1c. The upper cover 1a, upper frame 1b, lower frame 1c, and lower cover 1d are arranged sequentially from top to bottom. Adjacent components can be connected by adhesive or welding. Both the upper frame 1b and the lower frame 1c are annular. The upper cover 1a seals the upper end of the upper frame 1b, and the lower cover 1d seals the lower end of the lower frame 1c.

[0116] The electromagnetic drive device 5 includes an iron magnet assembly, such as... Figures 4 to 6 As shown, the edge magnet assembly includes an edge magnet assembly 53 and a magnet assembly 52 connected to the edge magnet assembly 53. The edge magnet assembly 53 includes a central magnetic conductor 530 and a first magnetic conductor 531 and a second magnetic conductor 532 respectively connected to both sides of the central magnetic conductor 530. Preferably, the first magnetic conductor 531 and the second magnetic conductor 532 are symmetrically arranged on both sides of the central magnetic conductor 530. The central magnetic conductor 530 is plate-shaped, and the first magnetic conductor 531 and the second magnetic conductor 532 are U-shaped, forming a first receiving hole 533 and a second receiving hole 534 respectively between them and the central magnetic conductor 530.

[0117] The magnet assembly 52 includes four plate-shaped magnets: a first magnet 521, a second magnet 522, a third magnet 523, and a fourth magnet 524. The first magnet 521 and the second magnet 522 are disposed within a first receiving hole 533, with their opposite poles facing each other. The first magnet 521 is connected to the surface of the first magnetic conductor 531 facing the intermediate magnetic conductor 530, and the second magnet 522 is connected to the surface of the intermediate magnetic conductor 530 facing the first magnetic conductor 531. The third magnet 523 and the fourth magnet 524 are disposed within a second receiving hole 534, with their opposite poles facing each other. The third magnet 523 is connected to the surface of the intermediate magnetic conductor 530 facing the second magnetic conductor 532, and the fourth magnet 524 is connected to the surface of the second magnetic conductor 532 facing the intermediate magnetic conductor 530.

[0118] The electromagnetic drive device 5 is connected to the housing assembly 1 via the intermediate magnetic conductor 530, specifically, as follows: Figure 1 As shown, the housing assembly 1 has a positioning hole 15 communicating with the rear cavity 12. The intermediate magnetic conductor 530 protrudes outside the first magnetic conductor 531 and the second magnetic conductor 532 and is installed in the positioning hole 15. It can be fixed to the housing assembly 1 by adhesive or welding. Preferably, the housing assembly 1 has two positioning holes 15 located on both sides, so that both ends of the intermediate magnetic conductor 530 can be fixed, resulting in better stability. To facilitate the connection between the intermediate magnetic conductor 530 and the positioning hole 15, such as... Figure 2 As shown, both the first housing 1b and the second housing 1c are provided with partial positioning holes 15. When the two intermediate housings are connected together, they can be spliced ​​together to form a complete positioning hole 15. In this way, the intermediate magnetic conductor 530 can be clamped in the positioning hole 15 by splicing them up and down.

[0119] like Figure 7 As shown, the armature 4 includes a first moving plate 40, a second moving plate 41 disposed opposite to each other, and a connecting portion 42 connecting the first moving plate 40 and the second moving plate 41. The first moving plate 40, the second moving plate 41, and the connecting portion 42 are integrally formed, for example, by bending. The armature 4 is made of a magnetically conductive material so that it can be polarized by a current-carrying coil 51. Figure 8 As shown, the dual-diaphragm receiver also includes an armature bracket 7 connected to the armature 4. Specifically, the armature bracket 7 is connected to the outer surface 422 of the connecting part 42, for example, by adhesive or welding.

[0120] Armature bracket 7 includes two first arms 70 extending to both sides of connector 42. The first arms 70 are glued to coil 51 and inner wall 1g of housing assembly 1. Figure 9As shown, the first arm 70 forms an adhesive block 9 at the bonding point between it and the coil 51 and the housing assembly 1. Because of the additional armature support 7, the height of its arm 70 can be set to be greater than the overall height of the armature 4, thereby increasing the connection area between the first arm 70 and the coil 51 and the housing assembly 1, and improving the strength of the connection.

[0121] The electromagnetic drive device 5 includes two coils 51, both of which are connected to the end faces of the iron magnet assembly facing the coils 51. The inner holes 510 of the two coils 51 are aligned with the first receiving hole 533 and the second receiving hole 534, respectively. The first moving piece 40 passes through the coils 51 and the first receiving hole 533, and the second moving piece 41 passes through the other coil 51 and the second receiving hole 534. In this embodiment, the magnetic poles of each magnet are arranged in the same direction, with the N pole at the bottom and the S pole at the top (in other embodiments, the S pole may be at the top and the N pole at the bottom). Magnetic poles of the same polarity face the same direction, which facilitates magnetizing the magnet assembly 52. ​​After the coils 51 are energized, the portions of the two moving pieces located in the two receiving holes are polarized into two poles of opposite polarity.

[0122] Both moving plates have a portion extending out of the ferrite magnet assembly, and the portion extending out of the ferrite magnet assembly is connected to the connecting rod 43. The other end of the connecting rod 43 is connected to the diaphragm assembly.

[0123] Preferably, the first diaphragm assembly 2 and the second diaphragm assembly 3 are symmetrically arranged within the housing assembly 1. For example... Figure 10 and Figure 11 As shown, both diaphragm assemblies include an annular outer frame 30 connected to the housing assembly 1, a vibrating plate 31 disposed within the outer frame 30, and a diaphragm 32 connected to the outer frame 30 and the vibrating plate 31. One end of the vibrating plate 31 is hinged to the outer frame 30, and there is a gap between the outer periphery of the vibrating plate 31 and the outer frame 30, so that the vibrating plate 31 can move relative to the outer frame 30 by using its connection portion 34 with the outer frame 30 as a hinge. The diaphragm 32 at least covers the gap between the outer periphery of the vibrating plate 31 and the outer frame 30. A connecting rod 43 is connected to the vibrating plate 31, for example, by adhesive bonding. When the vibrating plate moves, the connecting rod 43 synchronously drives the vibrating plate 31 to move. Furthermore, the first diaphragm assembly 2 and the second diaphragm assembly 3 also include an annular support 33, which is fixed on the inner wall 1g of the housing assembly 1 and cooperates with the outer frame 30 to clamp the outer edge of the diaphragm 32, thereby improving the overall robustness of the diaphragm assembly and facilitating the assembly and connection of the diaphragm assembly with the housing assembly 1.

[0124] like Figure 1 and Figure 3As shown, the dual-diaphragm receiver also includes a sound outlet tube 6 connected to the housing assembly 1. A sound cavity 60 is formed between the sound outlet tube 6 and the outer surface of the housing assembly 1. The housing assembly 1 is provided with a first sound outlet hole 13 communicating with the first front cavity 10 and a second sound outlet hole 14 communicating with the second front cavity 11. The sound outlet tube 6 covers the first sound outlet hole 13 and the second sound outlet hole 14, and its sound cavity 60 communicates with the two sound outlet holes. In this way, the sound emitted from the first sound outlet hole 13 and the second sound outlet hole 14 can be concentrated and emitted within the sound outlet tube 6, which can increase the sound pressure output.

[0125] like Figure 3 As shown, the dual-diaphragm receiver also includes a terminal block 8, which and the output tube 6 are located at opposite ends of the housing assembly 1. The lead wire of the coil 51 is connected to the terminal block 8, and the receiver is electrically connected to an external control device via the terminal block 8, which enables the dual-diaphragm receiver to be driven and facilitates wiring.

[0126] In this embodiment, the armature support 7 can be made of magnetic or non-magnetic material. When both the housing assembly 1 and the armature support 7 are made of magnetic material, and a magnetic connection is formed between the armature support 7 and the housing assembly 1, a magnetic connection is also formed between the armature 4 and the edge assembly 53. At this time, the magnetic field lines generated by the energized coil 51 form a magnetic circuit through the armature 4, the armature support 7, the housing assembly 1, and the edge assembly 53. Taking the portion of the first moving piece 40 located within the first magnetic pole pair 5a as polarized to the N pole as an example, the magnetic field lines are emitted through the N pole of the first moving piece 40, pass through the air gap and the second magnet 522, enter the intermediate magnetic conductor 530, and then return to the first moving piece 40 from the connection part 42 through the housing assembly 1 and the armature support 7, forming a magnetic circuit. In this case, the two coils 51 are used to polarize the moving pieces they surround, enabling independent control of the two moving pieces. The vibration mode of the diaphragm assembly is more diverse, and the acoustic performance of the dual-diaphragm receiver is richer.

[0127] When the armature support 7 is made of a non-magnetic material, a non-magnetic connection is formed between the armature 4 and the front iron assembly 53. At this time, the magnetic field lines generated by the energized coil 51 originate from the moving plate polarized to the N pole, pass through the air gap between the two moving plates, the two magnets, and the intermediate magnetic conductor 530, and then enter the moving plate polarized to the S pole. Afterward, they return to the N pole within the armature 4, forming a magnetic circuit. Each coil 51 can polarize two moving plates, and the portions of the two moving plates located between the two receiving holes are polarized to opposite poles, thus vibrating in opposite directions under the magnetic field of the magnet assembly 52.

[0128] Example 2

[0129] The difference between this embodiment and Embodiment 1 is that the dual-diaphragm receiver in this embodiment includes only one coil 51, such as... Figure 14As shown, the coil 51 is wrapped around the outside of the first moving plate 40. In this embodiment, the armature bracket 7 and the housing assembly 1 are connected without magnetic flux, and the coil 51 can simultaneously polarize the two moving plates, realizing the opposite vibration of the two moving plates. Similarly, in other embodiments, the coil 51 can also be sleeved on the second moving plate 41.

[0130] Example 3

[0131] The difference between this embodiment and Embodiment 1 is that the structure of its armature 4 is different from that in Embodiment 1.

[0132] like Figures 15 to 18 As shown, in this embodiment, the dual-diaphragm receiver does not have an armature bracket 7. Two second arms 420 extending towards the coil 51 are provided on both sides of the connecting portion 42 of the armature 4. The second arms 420 are connected to the two coils 51 and the inner wall 1g of the housing assembly 1 by adhesive bonding. Figure 17 and Figure 18 As shown, a rubber block 9 is formed at the connection between the second arm 420, the coil 51, and the housing assembly 1.

[0133] Since the dual-diaphragm receiver eliminates the need for armature support 7, there is no need to weld armature support 7 onto the armature 4, resulting in a simpler structure, simplified assembly process, and reduced costs.

[0134] Example 4

[0135] The difference between this embodiment and embodiment 3 is that the structure of its housing component 1 is different from that in embodiment 3.

[0136] like Figure 19 and Figure 20 As shown, in this embodiment, the upper cover 1a and upper frame 1b of the first housing 16 are integrally formed, and the lower frame 1c and lower cover 1d of the second housing 17 are integrally formed. This can further simplify the assembly process and improve production efficiency.

[0137] Furthermore, a through hole 120 is provided on both sides of the first housing 1a and both sides of the second housing 1b. Preferably, the through holes 120 on both sides are symmetrically arranged and are located at positions corresponding to the connection part 42 of the armature 4, which can reduce the stiffness of the rear cavity 12 and increase the low-frequency output.

[0138] The through hole 120 is preferably circular, with a diameter of 0.05 mm to 1 mm.

[0139] Example 5

[0140] The difference between this embodiment and Embodiment 1 is that the structure of the armature support 7 is different from that in Embodiment 1.

[0141] like Figures 21 to 24As shown, in this embodiment, the armature support 7 is a long, plate-like structure connected to the inner surface 421 of the connecting portion 42 of the armature 4. The connection method can be, for example, adhesive bonding or welding. The armature support 7 is adhesively bonded to the two coils 51 and the inner wall 1g of the housing assembly 1. Figure 23 and Figure 24 The adhesive block 9 at the connection point is shown. It is understood that in other embodiments, the armature bracket 7 may also be disposed on the outside of the connection portion 42 and connected to the outer surface 422 of the connection portion 42, with the inner surface 421 of the connection portion 42 and the coil 51 connected by adhesive, and the armature bracket 7 and the housing assembly 1 connected by adhesive.

[0142] Example 6

[0143] The difference between this embodiment and embodiment 5 is that the structure of the armature 4 is different from that in embodiment 5.

[0144] like Figures 25 to 28 As shown, in this embodiment, the first moving plate 40 and the second moving plate 41 of the armature 4 are independent of each other, and there is no connecting part 42 between them. The first moving plate 40 and the second moving plate 41 are connected by a long strip plate-shaped armature bracket 7, and the two are respectively connected to the center of the upper surface and the lower surface of the armature bracket 7.

[0145] The armature bracket 7 is glued to the two coils 51 and the inner wall 1g of the housing assembly 1. Figure 27 and Figure 28 The adhesive block 9 at the joint is shown.

[0146] In this embodiment, the armature support 7 is made of a magnetically conductive material.

[0147] Example 7

[0148] The difference between this embodiment and Embodiment 1 is that the structure of the housing assembly 1 in this embodiment is different from that in Embodiment 1.

[0149] like Figures 29 to 31 As shown, in this embodiment, the housing assembly 1 includes an upper cover 1a, a front housing 18 (with the end where the sound tube 6 is located as the front end), a rear housing 19, and a lower cover 1d. The front housing 18 and the rear housing 19 are arranged along the length direction of the housing assembly 1, and the two are joined together to form an annular housing. The upper cover 1a and the lower cover 1d are respectively connected to the upper and lower ends of the annular housing and seal the openings at both ends of the annular housing.

[0150] Both the front housing 18 and the rear housing 19 are provided with partial positioning holes 15. When the front housing 18 and the rear housing 19 are connected, they cooperate to form a complete positioning hole 15. The intermediate magnetic conductor 530 can be installed in the positioning hole 15 by splicing the front and rear, which is very convenient.

[0151] The connecting portion 42 of the armature 4 is connected to the rear housing 19, and the two can be connected by adhesive or welding. It is understood that the rear housing 19 serves as the armature support 7 in this embodiment.

[0152] Example 8

[0153] refer to Figure 32 and Figure 33 The difference between this embodiment and embodiment 1 is that the two moving plates and two coils 51 of the armature 4 in this embodiment adopt differentiated designs. The armature 4 is a one-piece molded design. The length of the first moving plate 40 is shorter than the length of the second moving plate 41, and the structure of the armature support 7 is also different.

[0154] For ease of description, the coil 51 sleeved on the first moving plate 40 is referred to as the upper coil 51a, and the coil 51 sleeved on the second moving plate 41 is referred to as the lower coil 51b. The length of the upper coil 51a is shorter than the length of the lower coil 51b.

[0155] The armature bracket 7 is a long, plate-like structure that is attached to the upper surface 400 of the first moving plate 40. The two can be fixed together by adhesive or welding. The armature bracket 7 is glued to the right end face 51c of the upper coil 51a and the inner wall 1g of the housing assembly 1.

[0156] In this embodiment, the two coils 51 are responsible for high-frequency and low-frequency functions respectively. Specifically, the output of the upper coil 51a is biased towards high frequency, and the output of the lower coil 51b is biased towards low frequency. In addition, the length of the suspended part of the first moving plate 40 is relatively short, which helps to improve the high-frequency response, while the length of the suspended part of the second moving plate 41 is significantly longer, and the connecting part 42 can also vibrate with the second moving plate 41, which can be understood as further increasing the length of the second moving plate 41, which helps to increase the low-frequency output.

[0157] To prevent the magnetic fields generated by the two coils 51 from interfering with each other, in this embodiment, both the housing assembly 1 and the armature bracket 7 are made of magnetically conductive material and are in contact with each other, so that both moving plates are magnetically connected to the edge assembly 53. In this way, the two coils 51 magnetize their respective moving plates without affecting the other moving plates, thus enabling independent control of the moving plates.

[0158] It is understood that the armature support 7, in addition to being connected to the upper coil 51a, can also be connected to the lower coil 51b. For example, in one embodiment, referring to... Figure 34 and Figure 35Third arms 71 extending toward the lower coil 51b are provided on both sides of the armature support 7 connected to the upper surface 400 of the first moving plate 40, thereby reducing the distance between the armature support 7 and the lower coil 51b, allowing the armature support 7 to be connected to both coils 51 simultaneously, resulting in a more secure connection. In another embodiment, refer to... Figure 36 and Figure 37 The armature bracket 7 is connected to the lower surface 401 of the first moving plate 40. At this time, it is close to both coils 51 and the two coils 51 can be connected by adhesive.

[0159] Example 9

[0160] The difference between this embodiment and embodiment 1 is that the structure of its housing assembly 1, intermediate magnetic conductor 530, armature 4 and armature support 7 are different from those in embodiment 1.

[0161] like Figure 38 As shown, in this embodiment, the first housing 16 and the second housing 17 are integrally formed, which makes the structure simpler, further simplifies the assembly process, and improves production efficiency.

[0162] Furthermore, in this embodiment, the outer contour dimensions of the intermediate magnetic conductor 530 are the same as the outer contour dimensions of the first housing 16 and the second housing 17, such as... Figure 38 and Figure 39 As shown, the outer edge of the intermediate magnetic conductor 530 is clamped between the first housing 16 and the second housing 17. The two housings are respectively connected to the upper and lower surfaces of the intermediate magnetic conductor 530, and the outer peripheral surfaces of the intermediate magnetic conductor 530, the first housing 16, and the second housing 17 are flush.

[0163] like Figure 40 and Figure 41 As shown, the intermediate magnetic conductor 530 also includes a clearance hole 5300. Two coils 51 are located at positions corresponding to the clearance hole 5300, and are partially located within the clearance hole 5300. This allows for full utilization of space to accommodate larger coils, which helps to obtain greater output and improve efficiency.

[0164] In this embodiment, the first moving plate 40 and the second moving plate 41 of the armature 4 are independent of each other, and there is no connecting part 42 between them. The armature bracket 7 is long and there are two of them. One of the two armature brackets 7 is connected between the first moving plate 40 and the intermediate magnetic conductor 530, and the other is connected between the second moving plate 41 and the intermediate magnetic conductor 530. They are fixed by welding or gluing.

[0165] In this embodiment, the armature support 7 is made of magnetic material, and the two moving plates and the intermediate magnetic component 530 are all magnetically connected. The two coils 51 drive the corresponding moving plates to vibrate.

[0166] It is understood that in other embodiments, the armature support 7 may be part of the intermediate magnetic conductor 530, that is, the armature support 7 and the intermediate magnetic conductor 530 are integrally formed as one part.

[0167] Example 10

[0168] The difference between this embodiment and Embodiment 1 is that the electromagnetic drive device 5 is different from that in Embodiment 1.

[0169] like Figures 42 to 45 As shown, in this embodiment, the intermediate magnetic conductor 530 of the electromagnetic drive device 5 is U-shaped and has a notch 5301. The two sides of the intermediate magnetic conductor 530 are located in the positioning holes 15 of the housing assembly 1.

[0170] The magnet assembly 52 includes three magnets: a first magnet 521, a second magnet 522, and a third magnet 523. The first magnet 521 and the third magnet 523 are respectively disposed within a first receiving hole 533 and a second receiving hole 534. Specifically, the first magnet 521 is connected to the surface of the first magnetic conductor 531 facing the intermediate magnetic conductor 530, and the third magnet 523 is connected to the surface of the second magnetic conductor 532 facing the intermediate magnetic conductor 530. The second magnet 522 is connected to the intermediate magnetic conductor 530 and is disposed within a notch 5301. Its two magnetic poles extend into the first receiving hole 533 and the second receiving hole 534, respectively. The first magnet 521 and the third magnet 523 are both disposed opposite to the second magnet 522.

[0171] The electromagnetic drive device 5 includes a coil 51, such as Figure 45 As shown, coil 51 is mounted on the second moving piece 41. It can be understood that it can also be mounted on the first moving piece 40. In this embodiment, the magnetic poles of the three magnets are all S pole on top and N pole on the bottom. After coil 51 is energized, at least the portions of the first moving piece 40 and the second moving piece 41 located within the corresponding magnetic pole pairs are simultaneously polarized into two poles of opposite polarity.

[0172] In this embodiment, the armature 4 and the front iron assembly 53 are connected by a non-magnetic connection. For example, the housing assembly 1 can be made of a non-magnetic material. When the housing assembly 1 is made of a magnetic material, in a preferred embodiment, the armature bracket 7 is made of a non-magnetic material and is connected to the housing assembly 1 and / or the coil 51 by adhesive. In another preferred embodiment, the armature bracket 7 is made of a magnetic material and is connected to the housing assembly 1 and / or the coil 51 by adhesive, but does not contact the housing assembly 1 and is only connected by glue.

[0173] When coil 51 is energized, the magnetic field lines it generates pass through the air gap and the second magnet 522 from the moving piece polarized to the N pole, into the moving piece polarized to the S pole, and then return to the moving piece polarized to the N pole through armature 4, forming a magnetic circuit.

[0174] In this embodiment, synchronous reverse driving of the first moving piece 40 and the second moving piece 41 can be achieved using one coil 51 and three magnets, which helps reduce costs and facilitates control. It is understood that in other embodiments, space can be fully utilized by mounting coils 51 on both moving pieces, thereby increasing output and improving efficiency. In this case, structurally, both moving pieces can be designed to be non-magnetically connected to the edge assembly 53, allowing the two coils 51 to jointly drive the two moving pieces; alternatively, both moving pieces can be designed to be magnetically connected to the edge assembly 53, allowing the two coils 51 to drive the corresponding moving piece vibrations respectively, achieving richer acoustic performance.

[0175] The present invention also proposes an electronic device comprising the dual-diaphragm receiver described above. The electronic device may be, for example, a hearing aid, headphones, or a telephone.

[0176] The above are merely specific embodiments of the present invention, and any improvements made based on the concept of the present invention shall be considered within the scope of protection of the present invention.

Claims

1. A dual-diaphragm receiver, characterized in that, include: The housing assembly (1) has an inner cavity; The first diaphragm assembly (2) is disposed in the inner cavity and connected to the housing assembly (1); The second diaphragm assembly (3) is disposed in the inner cavity and connected to the housing assembly (1). The first diaphragm assembly (2) and the second diaphragm assembly (3) divide the inner cavity into a first front cavity (10), a second front cavity (11) and a rear cavity (12) located between the first front cavity (10) and the second front cavity (11). An armature (4) is disposed within the rear cavity (12). The armature (4) includes a first moving plate (40) and a second moving plate (41) disposed opposite to each other. Both the first moving plate (40) and the second moving plate (41) are suspended at one end and fixed relative to the housing assembly (1) at the other end. The suspended end and the fixed end relative to the housing assembly (1) are respectively located at the two ends of the first moving plate (40) and the second moving plate (41) along the length direction. The first moving plate (40) is driven to the first diaphragm assembly (2), and the second moving plate (41) is driven to the second diaphragm assembly (3). The armature (4) is integrally formed. An electromagnetic drive device (5) is located in the rear cavity (12) and connected to the housing assembly (1). The first moving plate (40) and the second moving plate (41) are both inserted into the electromagnetic drive device (5). The electromagnetic drive device (5) is used to drive the first moving plate (40) and the second moving plate (41) to vibrate. The electromagnetic drive device (5) includes a magnet assembly (52) and a coil (51). The magnet assembly (52) includes a first magnetic pole pair (5a) and a second magnetic pole pair (5b). The first magnetic pole pair (5a) and the second magnetic pole pair (5b) each include two oppositely arranged magnetic poles with different polarities. The first moving plate (40) and the second moving plate (41) are respectively inserted between the two magnetic poles of the first magnetic pole pair (5a) and the second magnetic pole pair (5b). The coil (51) is sleeved on the outside of the moving plate of the armature (4) and does not contact the moving plate.

2. The dual-diaphragm receiver as described in claim 1, characterized in that, The electromagnetic drive device (5) includes an iron plate assembly (53), a first magnetic pole pair (5a) and a second magnetic pole pair (5b) are disposed on the iron plate assembly (53), the polarity of the magnetic poles of the first magnetic pole pair (5a) located on both sides of the first moving plate (40) is the same as the polarity of the magnetic poles of the second magnetic pole pair (5b) located on both sides of the second moving plate (41), and the first moving plate (40) and the second moving plate (41) are magnetically connected.

3. The dual-diaphragm receiver as described in claim 2, characterized in that, Both the first moving plate (40) and the second moving plate (41) are fitted with at least one of the coils (51), and the first moving plate (40) and the second moving plate (41) are magnetically connected to the edge iron assembly (53); or, Both the first moving plate (40) and the second moving plate (41) are fitted with at least one of the coils (51), and the first moving plate (40) and the second moving plate (41) are not magnetically connected to the edge iron assembly (53); or, Only one of the first moving plate (40) and the second moving plate (41) is fitted with at least one of the coils (51), and the first moving plate (40) and the second moving plate (41) are not magnetically connected to the edge iron assembly (53).

4. The dual-diaphragm receiver as described in claim 1, characterized in that, The frequency response curves of the first diaphragm assembly (2) and the second diaphragm assembly (3) are different.

5. The dual-diaphragm receiver as described in claim 1, characterized in that, The electromagnetic drive device (5) includes an iron edge assembly (53) connected to the magnet assembly (52). The iron edge assembly (53) includes an intermediate magnetic conductor (530) and a first magnetic conductor (531) and a second magnetic conductor (532) respectively connected to both sides of the intermediate magnetic conductor (530). A first receiving hole (533) is formed between the intermediate magnetic conductor (530) and the first magnetic conductor (531), and a second receiving hole (534) is formed between the intermediate magnetic conductor (530) and the second magnetic conductor (532).

6. The dual-diaphragm receiver as described in claim 5, characterized in that, The magnet assembly (52) includes a first magnet (521) connected to the first magnetic conductor (531), a second magnet (522) connected to the intermediate magnetic conductor (530), and a third magnet (523) connected to the second magnetic conductor (532). The two poles of the second magnet (522) are respectively located in the first receiving hole (533) and the second receiving hole (534). The opposite poles of the first magnet (521) and the second magnet (522) are arranged opposite to each other, and the opposite magnetic poles of the two constitute the first magnetic pole pair (5a). The opposite magnetic poles of the second magnet (522) and the third magnet (523) are arranged opposite to each other, and the opposite magnetic poles of the two constitute the second magnetic pole pair (5b).

7. The dual-diaphragm receiver as described in claim 5, characterized in that, The magnet assembly (52) includes a first magnet (521), a second magnet (522), a third magnet (523), and a fourth magnet (524). The second magnet (522) and the third magnet (523) are respectively connected to both sides of the intermediate magnetic conductor (530). The first magnet (521) is connected to the first magnetic conductor (531) and is arranged opposite to the second magnet (522). The opposite magnetic poles of the two magnets constitute the first magnetic pole pair (5a). The fourth magnet (524) is connected to the second magnetic conductor (532) and is arranged opposite to the third magnet (523). The opposite magnetic poles of the two magnets constitute the second magnetic pole pair (5b).

8. The dual-diaphragm receiver as described in claim 5, characterized in that, The coil (51) is connected to the magnet assembly (52) and / or the iron edge assembly (53), and the electromagnetic drive device (5) is connected to the housing assembly (1) through the intermediate magnetic conductor (530).

9. The dual-diaphragm receiver as described in claim 8, characterized in that, The housing assembly (1) has a positioning hole (15) communicating with the rear cavity (12), and the intermediate magnetic conductor (530) is installed in the positioning hole (15).

10. The dual-diaphragm receiver as described in claim 9, characterized in that, The housing assembly (1) includes a first housing (16) and a second housing (17) arranged along its height direction. Both the first housing (16) and the second housing (17) are provided with partial positioning holes (15). After the first housing (16) and the second housing (17) are connected, they are assembled to form the positioning holes (15); or, The housing assembly (1) includes a front housing (18) and a rear housing (19) arranged along its length direction. Both the front housing (18) and the rear housing (19) are provided with partial positioning holes (15). After the front housing (18) and the rear housing (19) are connected, they are assembled to form the positioning holes (15).

11. The dual-diaphragm receiver as described in claim 5, characterized in that, The housing assembly (1) includes a first housing (16) and a second housing (17), with the outer edge of the intermediate magnetic conductor (530) clamped between the first housing (16) and the second housing (17).

12. The dual-diaphragm receiver as described in claim 11, characterized in that, The first moving plate (40) and the second moving plate (41) are connected to the intermediate magnetic conductor (530).

13. The dual-diaphragm receiver as described in any one of claims 1 to 11, characterized in that, The armature (4) includes a connecting portion (42) integrally formed with the first moving plate (40) and the second moving plate (41), and at least one of the first moving plate (40), the second moving plate (41) and the connecting portion (42) is connected to the coil (51) and / or the housing assembly (1).

14. The dual-diaphragm receiver as described in any one of claims 1 to 11, characterized in that, It also includes an armature support (7) connected to the armature (4), the armature support (7) being connected to the coil (51) and / or the housing assembly (1).

15. The dual-diaphragm receiver as described in claim 14, characterized in that, The armature (4) includes a connecting portion (42) integrally formed with the first moving plate (40) and the second moving plate (41), and at least one of the connecting portion (42), the first moving plate (40) and the second moving plate (41) is connected to the armature support (7).

16. The dual-diaphragm receiver as described in any one of claims 1 to 12, characterized in that, The housing assembly (1) is provided with a first sound outlet (13) communicating with the first front cavity (10) and a second sound outlet (14) communicating with the second front cavity (11). The dual-diaphragm receiver also includes a sound outlet tube (6) connected to the housing assembly (1) and covering the first sound outlet (13) and the second sound outlet (14).

17. The dual-diaphragm receiver as described in any one of claims 1 to 12, characterized in that, Both the first diaphragm assembly (2) and the second diaphragm assembly (3) include an annular outer frame (30) connected to the housing assembly (1), a vibrating plate (31) disposed inside the outer frame (30) and hinged to the outer frame (30) at one end, and a thin film (32) connected to the outer frame (30) and the vibrating plate (31). The thin film (32) at least covers the gap between the vibrating plate (31) and the outer frame (30). The first moving plate (40) and the vibrating plate (31) of the first diaphragm assembly (2) and the second moving plate (41) and the vibrating plate (31) of the second diaphragm assembly (3) are connected by a connecting rod (43).

18. The dual-diaphragm receiver as described in any one of claims 1 to 12, characterized in that, The housing assembly (1) has a through hole (120) communicating with the rear cavity (12).

19. The dual-diaphragm receiver as described in any one of claims 1 to 12, characterized in that, When the first moving plate (40) and the second moving plate (41) vibrate simultaneously, their vibration directions are opposite.

20. An electronic device, characterized in that, Includes the dual-diaphragm receiver as described in any one of claims 1 to 19.

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