Receiver and electronic equipment

Abstract

The invention discloses a receiver and electronic equipment, and relates to the technical field of acoustics, and the receiver comprises a housing assembly, a permanent magnetic circuit system, two coils, a magnetic conductive plate assembly, a reset assembly and a diaphragm assembly. The permanent magnet magnetic circuit system is arranged in the shell assembly and fixed relative to the shell assembly, the permanent magnet magnetic circuit system comprises a yoke iron assembly and two magnet assemblies, and each magnet assembly comprises two magnets with opposite heteropoles; the two coils are arranged in the shell assembly and located on the two sides of the permanent magnet magnetic circuit system respectively. The magnetic conductive plate assembly is arranged in the two coils in a penetrating mode and located between the two magnets of the magnet assembly. The reset assembly is connected between the magnetic conductive plate assembly and the permanent magnet magnetic circuit system. The vibrating diaphragm assembly is connected with the magnetic conductive plate assembly. Through cooperation of the two coils and the two magnet assemblies, the magnetic conductive plate assembly vibrates, the vibrating diaphragm assembly is further driven to vibrate and produce sound, the driving force is increased, and the sensitivity is improved.

Description

Technical Field

[0001] The present invention relates to the field of acoustic technology, and in particular to a receiver and electronic equipment. Background Art

[0002] A receiver is an electroacoustic converter, usually used as a sound-generating device to convert electrical signals into sound. It is mainly used in the sound-generating units of headphones, hearing aids, sound-generating wearable devices and sound-generating electronic products.

[0003] A receiver usually includes components such as an armature, a diaphragm, a flange, two magnets, a coil and a driving rod. The armature is passed through the coil and is located between the two magnets. The armature of the receiver is U-shaped, one end of which is connected to the flange, and this end is the fixed end, which is fixed to the flange, the magnet and the coil. The other end of the armature is suspended and passed through the coil and the two magnets. This end is the free end, which is connected to the driving rod, and the driving rod is connected to the diaphragm. When the coil is energized, the end of the armature located between the two magnets is polarized, and it vibrates under the interaction with the magnetic field of the magnet, and drives the diaphragm to vibrate and make sound through the driving rod.

[0004] The receiver of the above structure adopts a single coil and dual magnet structure, and provides elastic force through the elastic deformation of the armature itself. There is room for further improvement in its driving force and sensitivity.

[0005] The above content is only used to help understand the technical solution of this application and does not constitute an admission that the above is prior art. Summary of the Invention

[0006] The object of the present invention is to provide a receiver and an electronic device to improve the sensitivity thereof.

[0007] To achieve the above-mentioned object, the present invention provides a receiver, comprising:

[0008] A housing assembly is provided with a receiving cavity;

[0009] a permanent magnetic circuit system disposed within the housing assembly and fixed relative to the housing assembly, the permanent magnetic circuit system comprising an ferrite assembly and two sets of magnet assemblies, the magnet assemblies forming a magnetic circuit through the ferrite assembly, each set of magnet assemblies comprising two magnets with opposite poles disposed opposite to each other;

[0010] Two coils are provided in the housing assembly, and the two coils are respectively located on both sides of the permanent magnet magnetic circuit system;

[0011] A magnetic conductive plate assembly is provided inside the two coils and is located between the two magnets of the magnet assembly;

[0012] A reset assembly connected between the magnetic plate assembly and the permanent magnetic circuit system; and

[0013] The diaphragm assembly is arranged in the shell assembly and divides the accommodating cavity into a front cavity and a rear cavity. The diaphragm assembly is connected to the magnetic plate assembly through a driving rod.

[0014] In another aspect, the present invention provides an electronic device comprising the above-mentioned receiver.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] According to some embodiments of the present invention, the receiver includes two groups of magnet assemblies and two coils. The cooperation of the two coils and the two groups of magnet assemblies causes the magnetic plate assembly to vibrate, thereby driving the diaphragm assembly to vibrate and produce sound, which is beneficial to increasing the driving force and improving the sensitivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of a receiver in some embodiments of the present invention.

[0018] Figure 2 yes Figure 1 An exploded view of the receiver is shown.

[0019] Figure 3 yes Figure 1 A perspective cutaway view of the receiver is shown.

[0020] Figure 4 yes Figure 1 A cross-sectional view of the receiver is shown.

[0021] Figure 5 yes Figure 4 The diagram shows a magnetic circuit diagram of the magnetic field generated at a certain moment after the coil of the receiver is energized.

[0022] Figure 6 1 is an exploded view of the diaphragm assembly of some embodiments of the present invention.

[0023] Figure 7 yes Figure 4 A schematic cross-sectional view of a portion of the receiver is shown.

[0024] Figure 8 yes Figure 1 The diagram shows a receiver's magnet assembly forming a magnetic circuit through an iron assembly.

[0025] Figure 9 yes Figure 1 The exploded view of the permanent magnet magnetic circuit system, magnetic plate assembly and reset assembly is shown.

[0026] Figure 10 Schematic diagram showing that each magnet assembly corresponds to a group of ferrite assemblies in some embodiments of the present invention.

[0027] Figure 11 Schematic diagram of the three-dimensional structure of the iron component in some embodiments of the present invention.

[0028] Figure 12 yes Figure 1 The diagram shows the position of the permanent magnetic circuit system and the magnetic plate assembly of the receiver.

[0029] Figure 13 1 is a schematic cross-sectional view of a receiver according to some embodiments of the present invention, in which two magnetic conductive plates are connected via a connecting block.

[0030] Figure 14 2 is a schematic cross-sectional view of a receiver according to some embodiments of the present invention, in which two magnetic conductive plates are connected via a gasket.

[0031] Figure 15 yes Figure 1 The receiver shown is a perspective schematic diagram without the housing assembly, diaphragm assembly and driver rod.

[0032] Figure 16 yes Figure 15 Schematic diagram of the reset component in the figure.

[0033] Figure 17 1 is a schematic cross-sectional view of a receiver in some embodiments of the present invention without showing the housing assembly and the diaphragm assembly. In the figure, the reset assembly includes two springs.

[0034] Figure 18 This is a cross-sectional schematic diagram of a receiver in some embodiments of the present invention without showing the housing assembly and the diaphragm assembly. In the figure, the coil is connected to the connecting piece.

[0035] Figure 19 3D is a schematic three-dimensional diagram of a reset assembly in some embodiments of the present invention. In the figure, each suspended portion of the spring has two holes.

[0036] Figure 20 3D is a schematic three-dimensional diagram of a reset assembly in some embodiments of the present invention. In the figure, each suspended portion of the spring has four holes.

[0037] Figure 21 2 is a top view of a reset assembly according to some embodiments of the present invention. In the figure, each suspended portion of the spring has two grooves.

[0038] Figure 22 1 is a schematic cross-sectional view of a receiver in some embodiments of the present invention without showing the housing assembly and the diaphragm assembly. In the figure, the reset assembly includes a connecting plate.

[0039] Figure 23 yes Figure 22Schematic diagram of the structure shown, when the coil is connected to the connecting plate.

[0040] Figure 24 yes Figure 22 In the structure shown, the reset assembly includes two springs.

[0041] Figure 25 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has a hole.

[0042] Figure 26 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has a hole.

[0043] Figure 27 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has two holes.

[0044] Figure 28 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has three holes.

[0045] Figure 29 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has six holes.

[0046] Figure 30 3D is a schematic three-dimensional diagram of spring pieces in some embodiments of the present invention. In the figure, each suspended portion of the spring piece has six holes.

[0047] Figure 31 1 is a schematic cross-sectional view of a receiver according to some embodiments of the present invention. In the figure, the magnetic conductive plate assembly includes a magnetic conductive plate. DETAILED DESCRIPTION

[0048] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. It will be understood that the specific embodiments described herein are only used to explain the present application, rather than to limit the present application. It should also be noted that, for ease of description, only some, rather than all, structures related to the present application are shown in the accompanying drawings. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0049] As used herein, the terms "comprise," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed, or may optionally include other steps or elements inherent to the process, method, product, or apparatus.

[0050] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0051] Some embodiments of the present invention provide a receiver, such as Figures 1 to 4 As shown, it includes main components such as a shell assembly 1, a permanent magnet magnetic circuit system 2, a coil 3, a magnetic conductive plate assembly 4, a reset assembly 5 and a diaphragm assembly 7. The shell assembly 1 is provided with a accommodating cavity, wherein the permanent magnet magnetic circuit system 2, the coil 3, the magnetic conductive plate assembly 4, the reset assembly 5 and the diaphragm assembly 7 are all located in the shell assembly 1 (accommodating cavity).

[0052] The permanent magnetic circuit system 2 is relatively fixed to the housing assembly 1. In some embodiments, such as Figure 3 and Figure 4 As shown, the permanent magnet circuit system 2 and the shell assembly 1 are connected via a spacer 60. One side of the spacer 60 is connected to the shell assembly 1, and the other side is connected to the outer surface 2a of the permanent magnet circuit system 2 and / or the spring clip 50. The connection method can be, for example, an adhesive connection.

[0053] The permanent magnet circuit system 2 includes two sets of magnet assemblies 21. Each set of magnet assemblies 21 includes two magnets 210 with opposite poles. The opposite pole arrangement means that the magnetic poles of the two magnets 210 are opposite to each other. For example, Figure 4 In the illustrated embodiment, the upper and lower magnets 210 have opposing poles, ie, an S pole and a N pole, respectively. It is understood that the polarity can also be reversed. Optionally, the two sets of magnet assemblies 21 are spaced apart along the length of the magnetic plate assembly 4 to reduce magnetic interference between adjacent magnets in the longitudinal direction.

[0054] In some embodiments, the number of coils 3 is two. Figure 3 and Figure 4As shown, the two coils 3 are respectively located on both sides of the permanent magnetic circuit system 2. Specifically, the two coils 3 and the permanent magnetic circuit system 2 are spaced apart along the length direction of the magnetic plate assembly 4, wherein the permanent magnetic circuit system 2 is located between the two coils 3.

[0055] The magnetic conductive plate assembly 4 is inserted into the two coils 3 and located between the two magnets 210 of the magnet assembly 21 . The magnetic conductive plate assembly 4 can vibrate relative to the permanent magnet magnetic circuit system 2 under the drive of the coils 3 .

[0056] Figure 3 In the illustrated embodiment, the magnetic conductive plate assembly 4 includes two magnetic conductive plates 40 respectively inserted into the two coils 3. The magnetic conductive plates 40 extend between the two magnets 210 of the magnet assembly 21 adjacent to the coil 3 inserted therein, and the adjacent ends of the two magnetic conductive plates 40 are not directly magnetically connected, that is, the two are not in direct contact or the two are not directly connected through magnetic conductive material, so that the magnetic field loops generated by the two coils 3 are independent to avoid mutual interference or magnetic short circuit. When the coils 3 are energized, the two coils 3 simultaneously polarize the parts of the two magnetic conductive plates 40 located between the two coils 3 to the same polarity. Specifically, the ends (inner ends) of the magnetic conductive plates 40 located in the magnet assembly 21 are polarized to the N pole or to the S pole, thereby generating an attractive force or a repulsive force with the magnet 210. For example, Figure 5 In the illustrated example, the end of the left magnetic plate 40 located within the magnet assembly 21 is polarized to the north pole. At this point, it is attracted by the upper magnet 210 and repelled by the lower magnet 210. Under the action of the magnetic force, the magnetic plate 40 moves upward relative to the permanent magnet circuit system 2. When the polarity of the inner end of the magnetic plate 40 changes to the south pole, it moves downward relative to the permanent magnet circuit system 2. The ends of the magnetic plate assembly 4 are spaced apart from the housing assembly 1, and the two do not contact each other, so that the magnetic plate assembly 4 can vibrate relative to the housing assembly 1.

[0057] It can be understood that when alternating current is supplied to the two coils 3 synchronously, so that the direction of the magnetic force between the two magnetic plates 40 and the corresponding magnet assemblies 21 is always the same at the same time, the magnetic plate assembly 4 will move as a whole in the same direction relative to the permanent magnet magnetic circuit system 2, thereby generating linear reciprocating vibration.

[0058] The reset assembly 5 is connected between the magnetic plate assembly 4 and the permanent magnetic circuit system 2. It enables the magnetic plate assembly 4 to produce relative displacement relative to the permanent magnetic circuit system 2. When the magnetic plate assembly 4 deviates from the initial position, it can provide a reset force to drive the magnetic plate assembly 4 back to the initial position. The initial position refers to the position of the magnetic plate assembly 4 when the receiver is not powered. Typically, in the initial position, the magnetic plate assembly 4 is centered between the two magnets of the magnet assembly 21 in the vibration direction. In some embodiments, the reset assembly 5 includes a spring 50 for providing an elastic force, and the elastic force of the spring 50 is used to reset the magnetic plate assembly 4 or the permanent magnetic circuit system 2.

[0059] The diaphragm assembly 7 is connected to the magnetic plate assembly 4 through a driving rod 8. When the magnetic plate assembly 4 vibrates under the excitation of the coil 3, the driving rod 8 drives the diaphragm assembly 7 to vibrate, thereby causing the diaphragm assembly 7 to vibrate and produce sound.

[0060] In some embodiments, as Figure 6 As shown, the diaphragm assembly 7 includes a fixed frame 70 connected to the housing assembly 1, a vibration plate 72 located within the fixed frame 70 and movably connected to the fixed frame 70, and a diaphragm 73 covering the fixed frame 70 and the vibration plate 72. The driving rod 8 is connected to the vibration plate 72 and can drive the vibration plate 72 to vibrate. Optionally, one end of the vibration plate 72 is connected to the fixed frame 70 by a hinge 71. During operation, the vibration plate 72 swings back and forth based on the hinge 71. Figure 6 In the illustrated embodiment, the fixing frame 70 is rectangular and annular and is integrally formed with the vibration plate 72 and the hinge 71. Optionally, the diaphragm assembly 7 further includes a support frame 74, which is rectangular and annular and fixedly connected to the inner wall of the housing assembly 1. The fixing frame 70 is connected to the support frame 74.

[0061] As can be understood, the presence of two sets of magnet assemblies 21 and two coils 3 generates a greater driving force for the receiver, increasing both its sensitivity and loudness, thereby enhancing the listening experience. Furthermore, by providing a restoring force through the spring 50, the overall stiffness coefficient (K value) can be made smaller, which helps reduce the low-frequency resonant frequency (low-frequency F0) of the vibration system, resulting in higher low-frequency sensitivity and better bass.

[0062] Herein, the vibration direction of the receiver is the vibration direction of the magnetic plate assembly 4 during operation, which is consistent with the thickness direction of the magnetic plate 40 and the magnetic plate assembly 4. This can reduce the thickness of the receiver, increase the relative area between the magnetic plate 40 and the magnet 210, and reduce the distance between the upper and lower magnets 210, thereby increasing the driving force.

[0063] In the embodiment of this specification, the length directions of the magnetic conductive plate 40, the magnetic conductive plate assembly 4 and the receiver are also consistent.

[0064] It is understood that in order to ensure that the vibrating part of the receiver can vibrate reliably, there is a vibration space between the vibrating part that vibrates when the receiver is working and the stationary fixed part in the vibration direction, so as to prevent the fixed part from hindering the movement of the vibrating part. Figure 7 As shown, Figure 7 Shown Figure 3 In the illustrated portion of the structure, in the vibration direction, a first spacing D1 is defined between the inner wall of the coil 3 and the magnetic plate 40, a second spacing D2 is defined between the magnet 210 and the magnetic plate 40, a third spacing D3 is defined between the spring 50 and the portion of the diaphragm assembly 7 facing it, and a fourth spacing D4 is defined between the spring 50 and the coil 3 to provide vibration space. Optionally, the first spacing D1, the third spacing D3, and the fourth spacing D4 are all greater than the second spacing D2, resulting in a relatively closer distance between the magnetic plate 40 and the magnet 210. This increases driving force, accelerates vibration response, and helps avoid noise generated by collisions with other components during vibration.

[0065] Next, the relevant contents of the housing component 1 are described with examples.

[0066] In some embodiments, the housing assembly 1 is formed by connecting multiple housings. In this article, the meaning of multiple is two or more. Figure 1 and Figure 2 As shown, the housing assembly 1 includes a first shell 10 and a second shell 11. The first shell 10 and the second shell 11 each include a substrate 100 and a frame 101 protruding from the outer edge of the substrate 100. The first shell 10 and the second shell 11 are connected by the frame 101. The frame 101 is annular. The diaphragm assembly 7 is located in the first shell 10, and the permanent magnet circuit system 2 is partially located in the second shell 11 and partially located in the first shell 10. The permanent magnet circuit system 2 is connected to the substrate 100 of the second shell 11 via a spacer 60.

[0067] In the illustrated embodiment, the housing assembly 1 is in the shape of a rectangular parallelepiped as a whole.

[0068] In some embodiments, the shell assembly 1 is made of magnetic conductive material, and the magnetic field generated by the coil 3 being energized forms a magnetic circuit through the shell assembly 1 to increase the utilization of the magnetic field, which can more efficiently polarize the magnetic conductive plate 40 and improve the driving force.

[0069] like Figure 5 As shown, Figure 5 In the illustrated embodiment, the two ends of the magnetic conductive plate assembly 4 are spaced apart from the outer shell assembly 1. After the coil 3 is energized, the magnetic flux lines are emitted from the end of the magnetic conductive plate 40 located inside the magnet assembly 21, pass through the magnet 210, the iron ferrite 220, the substrate 100 of the second shell 11, and the frame 101, and then return to the outer end of the magnetic conductive plate 40, forming a magnetic circuit. Figure 5It is understood that when the inner end of the magnetic plate 40 is polarized to the S pole, the direction of the magnetic flux lines is opposite.

[0070] Optionally, the spacer plate 60 is made of a magnetic conductive material to improve the magnetic conductivity between the ferrite 220 and the housing assembly 1 .

[0071] Optionally, in the thickness direction of the magnetic plate assembly 4, the distance L1 between the ferrite assembly 22 and the inner wall of the second shell 11 (specifically, the inner wall of the substrate 100) does not exceed 1 mm, and in the length direction of the magnetic plate assembly 4, the distance L2 between the magnetic plate 40 and the inner wall of the outer shell assembly 1 (specifically, the inner wall of the frame 101) does not exceed 1 mm. This allows other magnetic conductive materials to efficiently guide the magnetic flux lines to form a loop even when the spacer 60 is made of non-magnetic conductive material. Further, optionally, the distance L1 does not exceed 0.6 mm, and the distance L2 does not exceed 0.6 mm, to further improve the efficiency of forming the magnetic circuit.

[0072] The diaphragm assembly 7 divides the interior space (i.e., the accommodating chamber) of the housing assembly 1 into a front chamber 13 and a rear chamber 14. The permanent magnet system 2 is located in the rear chamber 14. The housing assembly 1 also has a sound outlet 12, which communicates with the front chamber 13. When the diaphragm assembly 7 vibrates, sound is emitted from the sound outlet 12. The sound outlet 12 and the permanent magnet system 2 are located on either side of the diaphragm assembly 7.

[0073] Next, the relevant contents of the permanent magnet magnetic circuit system 2 are described with examples.

[0074] like Figure 4 As shown, the two magnets 210 of the magnet assembly 21 are respectively located on both sides of the thickness direction of the magnetic conductive plate 40, so that the magnets 210 and the surface of the magnetic conductive plate 40 in the thickness direction (i.e., the upper surface or the lower surface) are arranged relative to each other. Since the area of the surface in the thickness direction is relatively larger and the thickness dimension is relatively smaller, it is beneficial to increase the driving force.

[0075] In some embodiments, the magnetization directions of the two sets of magnet assemblies 21 are the same, that is, the arrangement direction of the magnetic poles of the magnets 210 is the same, both are arranged along the thickness direction of the magnetic conductive plate 40, and the arrangement order of the two magnetic poles is also the same, for example Figure 4In the illustrated embodiment, both poles of the magnet 210 are arranged along the thickness direction, with the N pole at the top and the S pole at the bottom. The directions of the magnetic fields generated by the two coils 3 at the same time are opposite, so that the polarities of the ends of the two magnetic conductive plates 40 in the magnet assembly 21 at the same time are the same. Since the magnetization directions of all magnets 210 are the same, magnetization is more convenient. It is understandable that in other embodiments, the magnetization directions of the two groups of magnet assemblies 21 can also be opposite. In this case, the directions of the magnetic fields generated by the two coils 3 at the same time are the same, so that the polarities of the ends of the two magnetic conductive plates 40 in the magnet assembly 21 at the same time are opposite. In some embodiments, the two coils 3 are connected in series to ensure the synchronization of the generated magnetic fields.

[0076] like Figure 3 、 Figure 5 、 Figure 8 and Figure 9 As shown, the permanent magnet magnetic circuit system 2 includes an iron component 22 , which is provided with a channel 221 running through the length direction of the magnetic conductive plate 40 , and the two magnets 210 of the magnet component 21 are both connected to the inner surface 22 a of the iron component 22 .

[0077] In some embodiments, as Figure 3 and Figure 4 As shown, the two sets of magnet assemblies 21 share a set of ferrite assembly 22, and the two sets of magnet assemblies 21 are arranged in the channel 221 of the same ferrite assembly 22. This is conducive to improving the compactness of the structure, allowing the permanent magnet circuit system 2 to be assembled into a whole, making it easier to install, and at the same time increasing the mass of the permanent magnet circuit system 2.

[0078] In some embodiments, as Figure 10 As shown, each set of magnet assemblies 21 has a corresponding set of ferrite assemblies 22. The two sets of magnet assemblies 21 are respectively disposed within the channels 221 of the two sets of ferrite assemblies 22. The two sets of ferrite assemblies 22 are spaced apart along the length of the magnetic conductive plate assembly 4. Optionally, both sets of ferrite assemblies 22 are connected to the same spring clip 50, so that they are assembled into a whole by the spring clip 50 and then installed, thereby ensuring the relative position of the two sets of ferrite assemblies 22.

[0079] In some embodiments, the ferrite assembly 22 is formed by connecting a plurality of ferrites 220 . Figure 11 In the illustrated embodiment, the ferrite assembly 22 includes two ferrites 220. Each ferrite 220 includes a base plate 2200 and side plates 2201 protruding from either side of the base plate 2200. The two ferrites 220 are connected via the side plates 2201. The two magnets 210 of the magnet assembly 21 are respectively connected to the base plates 2200 of the two ferrites 220. The magnet assembly 21 can form a magnetic circuit through the ferrite assembly 22, thereby improving the utilization of the magnetic field and increasing the driving force. Figure 8In the figure, the dotted line with an arrow indicates the magnetic circuit of the magnet assembly 21. The magnetic flux lines emitted by the N pole of the upper magnet 210 pass through the upper base plate 2200, the upper side plate 2201, the lower side plate 2201 and the lower base plate 2200 in sequence and then enter the S pole of the lower magnet 210. The magnetic flux lines emitted by the N pole of the lower magnet 210 enter the S pole of the upper magnet 210 from the air gap, thereby forming a closed loop.

[0080] In some embodiments, as Figure 12 As shown, the outer side surface 220a of the ferrite assembly 22 is flush with the outer side surface 210b of the adjacent magnet 210. The outer side surface refers to the side of the ferrite assembly 22 and magnet 210 near the end of the receiver. This allows full utilization of the ferrite assembly 22 and magnet 210, improving the compactness of the structure and reducing the length of the receiver.

[0081] Next, the relevant contents of the magnetic conductive plate assembly 4 are described with examples.

[0082] The magnetic conductive plate assembly 4 is in a strip shape as a whole, with its length being greater than its width, and its width being greater than its thickness.

[0083] In some embodiments, as Figure 13 As shown, the two magnetic conductive plates 40 are spaced apart and connected by a connecting block 43. This provides support for the inner ends of the magnetic conductive plates 40 within the magnet assembly 21, enhancing the overall structural strength of the magnetic conductive plate assembly 4 and ensuring the vibration stability of the receiver. Furthermore, the magnetic conductive plate assembly 4 can be installed as a single unit, making installation more convenient. Optionally, the two magnetic conductive plates 40 can be spaced apart along the length of the magnetic conductive plate assembly 4.

[0084] The connecting block 43 is made of non-magnetic material, such as stainless steel, copper, aluminum or ceramic, and can be connected to the magnetic conductive plate 40 by gluing or welding.

[0085] Optionally, the surfaces of the two magnetic conductive plates 40 in the vibration direction are flush (i.e., the upper surfaces of the two magnetic conductive plates 40 are flush, and the lower surfaces of the two magnetic conductive plates 40 are flush) to fully utilize the space and ensure the consistency of the width of the magnetic gap between the magnetic conductive plates 40 and the magnet 210.

[0086] Optionally, the surfaces of the magnetic conductive plate 40 and the connecting block 43 in the vibration direction are flush (i.e., the upper surface of the magnetic conductive plate 40 is flush with the upper surface of the connecting block 43, and the lower surface of the magnetic conductive plate 40 is flush with the lower surface of the connecting block 43). In this way, there is a large contact area between the magnetic conductive plate 40 and the connecting block 43, and the connection strength is good. In addition, the connecting block 43 does not protrude from the outer surface of the magnetic conductive plate 40, which helps prevent the connecting block 43 from colliding with the magnet 210 during vibration, generating noise or causing damage. Further, optionally, the magnetic conductive plate 40 and the connecting block 43 have the same wall thickness, and the wall thickness of the two is the same everywhere.

[0087] In some embodiments, as Figure 14 As shown, the two magnetic conductive plates 40 are spaced apart and connected by a gasket 44. The gasket 44 is made of a non-magnetic material and is connected to the surface 40a of the magnetic conductive plate 40 facing the magnet 210 (i.e., the surface in the thickness direction) to increase the structural strength of the magnetic conductive plate assembly 4 and the stability of the receiver vibration. Optionally, gaskets 44 are provided on both surfaces of the magnetic conductive plate 40 in the thickness direction to improve the strength of the connection. Optionally, the two magnetic conductive plates 40 are spaced apart along the length of the magnetic conductive plate assembly 4. In some embodiments, the gasket 44 extends between the magnetic plate 40 and the magnet 210 so that the gasket 44 can protect the magnet 210 and the magnetic plate 40. Optionally, the gasket 44 is made of a hard material whose hardness is less than that of the magnetic plate 40. For example, it can be made of stainless steel, copper, aluminum or plastic. When the magnet 210 undergoes a large displacement and moves toward the magnetic plate 40, the magnet 210 will contact the gasket 44 instead of the magnetic plate 40, thereby playing a protective role.

[0088] In some embodiments, a connecting block 43 and a gasket 44 are provided between the two magnetic conductive plates 40. The gasket 44 is at least partially located between the magnetic conductive plates 40 and the magnet 210. The gasket 44 is made of non-magnetic material to prevent the magnetic conductive plates 40 and the magnet 210 from being stuck together due to contact. The hardness of the gasket is less than that of the magnetic conductive plates 40 to improve the anti-collision effect. Figure 3 and Figure 7 As shown, the gasket 44 connects the connecting block 43 and the two magnetic conductive plates 40, further improving the connection strength and providing protection. When the connecting block 43 is provided, the gasket 44 can be made of a flexible material with a hardness lower than that of the magnet 210 to provide better collision protection. The flexible material can be, for example, rubber.

[0089] Optional, reference Figure 7 The length L3 of the portion of the gasket 44 between the magnet 210 and the magnetic conductive plate 40 is not less than one-third of the length L4 of the magnet 210, so that it can reliably play an anti-collision effect and obtain better connection strength.

[0090] Optionally, in the above embodiment, the spacing L5 between the two magnetic conductive plates 40 is no less than 0.2 mm to reduce mutual interference between the magnetic fields of the two magnetic conductive plates 40 after polarization. Further, optionally, the spacing L5 does not exceed 1 mm to ensure that the overall length of the receiver is not excessively large. Optionally, the distance between two adjacent magnets 210 in the longitudinal direction is no less than 0.2 mm, and further, optionally, does not exceed 1 mm to reduce magnetic field interference between the two magnets 210. Further, optionally, the distance between two adjacent magnets 210 in the longitudinal direction is the same as the spacing L5 between the two magnetic conductive plates 40.

[0091] In some embodiments, as Figure 12 As shown, the inner side surface 40b of the magnetic conductive plate 40 is flush with the inner side surface 210a of the adjacent magnet 210 to fully utilize the magnet 210 and reduce the mutual interference of the magnetic fields between the two magnetic conductive plates 40 after they are polarized. For example, if the magnetic conductive plate 40 is retracted into the inner side surface 210a of the magnet 210, the utilization rate of the magnetic field of the magnet 210 will be reduced. If the magnetic conductive plate 40 protrudes beyond the inner side surface 210a of the magnet 210, the two magnetic conductive plates 40 are likely to be too close to each other, and a large repulsive force is likely to be generated between them, which is not conducive to structural stability. If the spacing between the two magnetic conductive plates 40 is maintained, the volume of the housing assembly 1 will be increased, or the volume of the magnet 210 will be reduced, thereby reducing the driving force. The inner side surface refers to the side of the magnetic conductive plate 40 and the magnet 210 that is relatively far away from the end of the housing assembly 1.

[0092] Next, the relevant contents of the reset component 5 are described with examples.

[0093] The reset assembly 5 is located on one side of the vibration direction of the magnetic plate assembly 4 to provide elastic force along the vibration direction. There are many ways to connect the reset assembly 5 to the permanent magnetic circuit system 2 and the magnetic plate assembly 4, which are described below with examples.

[0094] In some embodiments, the reset assembly 5 is connected to the permanent magnetic circuit system 2 and the magnetic plate assembly 4, such as Figure 15 and Figure 16As shown, the reset assembly 5 includes two fixed pieces 51 at both ends thereof and a connecting piece 52 connected between the spring piece 50 and the fixed piece 51. The spring piece 50 is connected to the outer surface 2a of the permanent magnetic circuit system 2 facing away from the magnetic plate 40 in the vibration direction (in the figure, the outer surface is the outer surface of the iron component 22). The two fixed pieces 51 are respectively located on both sides of the two coils 3 along the length direction of the magnetic plate assembly 4 and are connected to the magnetic plate 40. The spring piece 50 has a first fixed portion 500 located in the middle thereof and connected to the permanent magnetic circuit system 2, and a suspended portion 501 located between the first fixed portion 500 and the connecting piece 52. The reset assembly 5 mainly provides the reset force through the elastic deformation of the suspended portion 501. There is a vibration space between the suspended portion 501 of the spring piece 50 and the coil 3.

[0095] Optionally, the spring piece 50, the connecting piece 52 and the fixing piece 51 are integrally formed, for example, by integrally bending a metal sheet, so as to reduce the number of overall parts, facilitate assembly, and improve assembly accuracy.

[0096] Optionally, the fixing plate 51 is connected to the surface 40a of the magnetic conductive plate 40 facing the spring 50, and the connecting plate 52 is arranged parallel to the vibration direction and perpendicular to the spring 50 and the fixing plate 51. This can improve the supporting performance of the connecting plate 52 and provide more sufficient space for accommodating the coil 3. When the coil 3 is connected to the connecting plate 52, it can also facilitate the installation of the coil 3 and improve the connection strength.

[0097] In other embodiments, the reset assembly 5 is connected to the permanent magnetic circuit system 2 and the magnetic plate assembly 4, such as Figure 22 As shown, the spring piece 50 is connected to the outer surface 2a of the permanent magnetic circuit system 2 facing away from the magnetic plate 40 in the vibration direction (in the figure, the outer surface is the outer surface of the iron component 22), and its two ends extend along the length direction of the magnetic plate component 4 to exceed the permanent magnetic circuit system 2, and extend respectively toward the side where the two coils 3 are located. The reset component 5 and its spring clip 50 extend beyond the two ends of the two coils 3 in the length direction of the magnetic plate assembly 4. The reset component 5 includes two connecting plates 53 located at the two ends of the two coils 3 along the length direction of the magnetic plate assembly 4. The connecting plate 53 is connected between the spring clip 50 and the magnetic plate 40. The part of the spring clip 50 connected to the permanent magnet magnetic circuit system 2 is its first fixed part 500, and the part connected to the connecting plate 53 is its second fixed part 502. The part located between the first fixed part 500 and the second fixed part 502 is its suspended part 501. The reset component 5 mainly provides the reset force through the elastic deformation of the suspended part 501. The suspended part 501 of the spring clip 50 is arranged opposite to the coil 3, and there is a vibration space between the two.

[0098] The connecting plate 53 can be made of magnetic conductive material or non-magnetic conductive material.

[0099] Optional, such as Figure 22and Figure 23 As shown, the connecting plate 53 is connected to the surface 40a of the magnetic plate 40 facing the spring 50, and the spring 50 is connected to the surface of the connecting plate 53 facing away from the magnetic plate 40 for easy fixation. The connecting plate 53 is arranged parallel to the vibration direction and perpendicular to the spring 50.

[0100] Optionally, the spring 50 is in the shape of a flat sheet, and its thickness direction is consistent with the vibration direction of the receiver, so that it can be elastically deformed along the vibration direction, and the deformation amplitude of the upper and lower sides is more consistent, while saving space in the thickness direction of the receiver.

[0101] In some embodiments, as Figure 4 and Figure 22 As shown, the receiver includes two sets of reset components 5, and the two sets of reset components 5 are symmetrically arranged on both sides of the thickness direction of the magnetic conductive plate component 4, so that when the receiver is working, the vibration of the vibrating part is more stable and the linearity is better.

[0102] It is understandable that the number of springs 50 included in the reset assembly 5 is not limited to one, and it can also include two or more springs 50, all of which are connected to the outer surface of the permanent magnet circuit system 2 facing away from the magnetic plate 40 in the vibration direction of the receiver, and at least two springs 50 extend toward the sides where the two coils 3 are located, so as to be connected to the two ends of the magnetic plate assembly 4 through the connecting piece 52 or the connecting plate 53 or other components. For example, Figure 17 and Figure 24 In the embodiment shown, the reset assembly 5 includes two spring clips 50, one end of which is connected to the permanent magnet magnetic circuit system 2, and the other end extends along the length direction of the magnetic plate assembly 4 toward the side where the coil 3 is located, so as to be connected to the connecting piece 52 or the connecting plate 53. The two spring clips 50 extend in opposite directions, and the two spring clips 50 extend toward the sides where the two coils 3 are located respectively. The reset assembly 5 extends in the length direction of the magnetic plate assembly 4 to exceed the two ends of the two coils 3 and is connected to the two ends of the magnetic plate assembly 4. It can be understood that Figure 4 For example, a single spring clip 50 extending beyond both ends of the permanent magnet circuit system 2 increases the contact area between the spring clip 50 and the permanent magnet circuit system 2, improving the connection effect. Furthermore, the positional accuracy of the spring clip 50 can be more accurately guaranteed, eliminating the need to adjust the relative positions of the two spring clips 50. This also helps reduce the number of parts and improves production efficiency.

[0103] It can be understood that the two ends of the magnetic plate assembly 4 extend beyond the two ends of the two coils 3, and the two ends of the reset assembly 5 are respectively connected to the two ends of the magnetic plate assembly 4 located outside the two coils 3, and the middle part is connected to the permanent magnet magnetic circuit system 2, which can make the force on the magnetic plate assembly 4 more symmetrical, more stable during vibration, and better linear.

[0104] Next, examples are given to illustrate the content related to shrapnel.

[0105] It is understood that the thickness of the spring 50 is smaller than that of the magnetic plate 40, and its stiffness coefficient is relatively small, which allows the low-frequency resonance frequency of the receiver to be lower, thereby improving the low-frequency effect. Furthermore, the spring 50 extends to connect with the connecting plate 53 or the connecting plate 52 outside the coil 3, which can fully utilize the space inside the housing assembly 1 and increase the length of the suspended portion 501 of the spring 50, thereby reducing the stiffness coefficient of the spring 50 and improving the low-frequency effect. In addition, the suspended portion 501 of the spring 50 does not need to be very thin in the width direction, which is not easy to damage, and is conducive to improving the reliability of the spring 50.

[0106] In some embodiments, the effective width B2 of at least part of the suspended portion 501 is smaller than the width B1 of the spring 50. The effective width of the suspended portion 501 refers to the minimum width of the solid part of the suspended portion 501. Figure 16 Taking the embodiment shown as an example, the effective width is the sum of B20 and B21. Figure 21 Taking the illustrated embodiment as an example, the effective width B2 of the overhang portion 501 is the width at its narrowest point. A smaller effective width indicates less material in the width direction of the overhang portion 501. The width B1 of the spring clip 50 refers to the width at its widest point. By adjusting the effective width of the overhang portion 501, the stiffness coefficient of the spring clip 50 can be adjusted. Setting the effective width B2 of the overhang portion 501 to be smaller than the width B1 of the spring clip 50 effectively reduces the stiffness coefficient of the spring clip 50 and improves the low-frequency effect.

[0107] In some embodiments, the suspended portion 501 is provided with a hollow structure, and the effective width is reduced by the hollow structure. As some feasible examples, the hollow structure includes a hole 503 that is not connected to the side wall of the elastic sheet 50 in the width direction. Figure 15 、 Figure 16 、 Figure 19 、 Figure 20 and Figures 25 to 30 Schematic diagrams are shown when the hollow structure includes a hole 503. In these embodiments, the effective width of the suspended portion 501 is smaller than its own width B4. As other feasible examples, Figure 21 As shown, the hollow structure includes a slot 504 communicating with the sidewall 50a in the width direction of the elastic sheet 50. In other examples, the hollow structure may include both the hole 503 and the slot 504.

[0108] Optionally, the width of the suspended portion 501 is the same as the width of the portion where the spring clip 50 contacts the permanent magnet circuit system 2, so as to improve its anti-torsion capability, thereby improving the stability and linearity of the vibration. Optionally, the ratio of the width of the spring clip 50 to the width of the permanent magnet circuit system 2 is not less than 0.3, so as to ensure the contact area with the permanent magnet circuit system 2, improve the contact effect, and further ensure the anti-torsion capability of the spring clip 50. The width of the permanent magnet circuit system 2, i.e., the width of the ferrite component 22, refers to the width at its widest point. In this article, unless otherwise specified as "effective width", the "width" of an object refers to the width of its outer contour, without removing its hollowed-out portion. Further optionally, the spring clip 50 is of equal width.

[0109] It is understandable that by adjusting the number, area, shape and position of the holes 503 and the slots 504, the stiffness coefficient and mode of the shrapnel 50 can be adjusted, the frequency response curve of the receiver can be changed, and richer product performance can be achieved.

[0110] In some embodiments, as Figure 16 、 Figure 25 and Figure 26 As shown, the hollow structure of each suspended portion 501 includes a hole 503. The shape of hole 503 can be, for example, a rounded rectangle or an ellipse. The stiffness coefficient can be adjusted by adjusting the length, width, and shape of hole 503. Optionally, hole 503 extends along the length of spring plate 50, and the length of spring plate 50 is consistent with the length of magnetic plate assembly 4.

[0111] In some embodiments, the hollow structure includes at least two holes 503, and the at least two holes 503 are spaced apart along the length direction or the width direction of the elastic sheet 50. Figure 19 and Figure 27 As shown, the hollow structure of each suspended portion 501 includes two holes. The two holes 503 are spaced apart along the length direction of the elastic piece 50. The shape of the hole can be a rounded rectangle, an ellipse, a trapezoid or a triangle. Figure 28 In the illustrated embodiment, the hollow structure includes three holes 503 spaced apart along the length direction of the elastic piece 50 . The holes are triangular in shape and arranged in a substantially rectangular shape. Figure 20 In the illustrated embodiment, the hollow structure includes four holes 503 , and the four holes 503 are arranged in two rows and two columns. Figure 29 and Figure 30 In the illustrated embodiment, the hollow structure includes six holes 503 arranged in two rows and three columns.

[0112] It can be understood that the number of holes mentioned above refers to the number of holes in the hollow structure on a single suspended portion 501 .

[0113] The spring piece 50 and the permanent magnetic circuit system 2 can be connected by gluing or welding. In some embodiments, the hollow structure at least partially extends to the outer surface of the permanent magnetic circuit system 2, so that the outer surface of the permanent magnetic circuit system 2 is exposed to form a glue-containing space to improve the connection strength of the adhesive connection.

[0114] In some embodiments, the spring clip 50 is made of a magnetically conductive material, which facilitates guiding the magnetic flux lines to form a loop and improves the magnetic conductivity. Optionally, the spring clip 50, the connecting piece 52, and the fixing piece 51 are all made of a magnetically conductive material, and the connecting plate 53 is also made of a magnetically conductive material. In other embodiments, the spring clip 50 is made of a non-magnetic material. Optionally, the spring clip 50 is a spring steel sheet, and further optionally, the spring clip 50 is a stainless steel spring steel sheet.

[0115] Next, the contents related to coil 3 are described with examples.

[0116] There are two coils 3 , which are respectively located at two ends of the permanent magnet magnetic circuit system 2 along the length direction of the magnetic conductive plate assembly 4 .

[0117] In some embodiments, the coil 3 is fixed relative to the permanent magnet circuit system 2, such as Figure 7 and Figure 22 As shown, the coil 3 is connected to the outer side surface 2b of the permanent magnetic circuit system 2, for example, by adhesive connection. Optionally, the outer side surface 210b of the magnet 210 is flush with the outer side surface 220a of the ferrite component 22, so that the contact area between the coil 3 and the outer side surface 2b of the permanent magnetic circuit system 2 is larger and the connection strength is better. When the outer side surface of the ferrite component 22 and the outer side surface of the magnet 210 are not flush, the relatively convex surface of the two is the outer side surface 2b of the permanent magnetic circuit system 2.

[0118] When the coil 3 is fixed relative to the permanent magnetic circuit system 2, it moves synchronously with the permanent magnetic circuit system 2. For example, in some embodiments, as shown in FIG. Figure 7 and Figure 22 As shown, the permanent magnetic circuit system 2 is connected to the housing assembly 1 through a spacer 60. During the operation of the receiver, the magnetic plate assembly 4 ( Figure 7 ) or the magnetic plate assembly 4 and the connecting plate 53 ( Figure 22 ) as a whole vibrates relative to the housing assembly 1. When the reset assembly 5 is formed by bending a metal sheet, the relatively small mass of the connecting piece 52 and the fixing piece 51 facilitates increased response speed. The spacer 60 can be connected to the base plate 100 of the housing assembly 1 or to the frame 101 of the housing assembly 1. When connected to the base plate 100, it facilitates the formation of a vibration space between the spring 50 and the base plate 100.

[0119] In some embodiments, the coil 3 is relatively fixed to the magnetic plate assembly 4, and can be connected to the reset assembly 5 to achieve relative fixation with the magnetic plate assembly 4. Figure 18 In the illustrated embodiment, the coil 3 is connected to the connecting piece 52 of the spring 50 so that the coil 3 is relatively fixed with respect to the magnetic plate assembly 4. Optionally, the connecting piece 52 is arranged perpendicular to the magnetic plate 40 to improve the supporting performance and reduce or even prevent the deformation of the connecting piece 52 during vibration. The surface 52a of the coil 3 and the connecting piece 52 facing the permanent magnetic circuit system 2 can be glued, for example. Optionally, the hollow structure portion extends to the surface where the coil 3 contacts the connecting piece 52 (i.e., the outer surface of the coil 3) to form a glue space to improve the strength of the adhesive connection. It can be understood that the connection between the coil 3 and the connecting piece 52 can also improve the supporting performance of the connecting piece 52. For example, in Figure 23 In the illustrated embodiment, the coil 3 is connected to the connecting plate 53 so that the coil 3 is relatively fixed relative to the magnetic conductive plate assembly 4. The coil 3 and the surface 53a of the connecting plate 53 facing the permanent magnetic circuit system 2 can be connected by, for example, adhesive bonding. Since the connecting plate 53 is thicker than the connecting piece 52, its rigidity is relatively better. Therefore, during vibration, the connecting plate 53 is not easily deformed and can reliably maintain its connection with the coil 3.

[0120] When the coil 3 is relatively fixed to the magnetic plate assembly 4, it moves synchronously with the magnetic plate assembly 4. Figure 18 In the illustrated embodiment, the permanent magnetic circuit system 2 is fixed relative to the housing assembly 1 , and the entirety formed by the magnetic plate assembly 4 and the coil 3 vibrates relative to the housing assembly 1 . Figure 23 In the illustrated embodiment, the entirety of the magnetic conductive plate assembly 4 , the coil 3 and the connecting plate 53 vibrates relative to the housing assembly 1 .

[0121] It can be understood that when the coil 3 and the magnetic plate assembly 4 are relatively fixed, the distance between them and the magnetic plate 40 remains unchanged, and the polarization of the magnetic plate 40 is not easily affected by changes in the distance between the two, which is beneficial to improving the acoustic performance.

[0122] Optionally, when the coil 3 is connected to the permanent magnetic circuit system 2, there is a gap between it and the connecting piece 52 or the connecting plate 53. When the coil 3 is connected to the connecting piece 52 or the connecting plate 53, there is a gap between it and the permanent magnetic circuit system 2. The provision of the gap not only prevents the coil 3 from colliding with the permanent magnetic circuit system 2 or the connecting piece 52 or the connecting plate 53 during vibration, but also increases the length of the suspended portion 501 of the spring 50, thereby improving low-frequency acoustic performance.

[0123] Next, the relevant contents of the driving rod 8 are described with examples.

[0124] In some embodiments, the driving rod 8 is arranged in the middle of the magnetic plate assembly 4, between the two groups of magnet assemblies 21, to improve the overall compactness and reduce the volume. At the same time, it can improve the symmetry of the force applied to the magnetic plate assembly 4, making it more stable during vibration.

[0125] When the two magnetic conductive plates 40 of the magnetic conductive plate assembly 4 are connected by the connecting block 43, as shown in FIG. Figure 13 As shown, the driving rod 8 can be directly connected to the connecting block 43. When the two magnetic conductive plates 40 of the magnetic conductive plate assembly 4 are connected by a hard gasket 44, as shown in FIG. Figure 14 As shown, the driving rod 8 can be directly connected to the gasket 44 (can be connected to one or two gaskets 44). When the two magnetic conductive plates 40 of the magnetic conductive plate assembly 4 are connected by a connecting block 43 and a gasket 44 at the same time, the driving rod 8 can be connected to the connecting block 43 or the gasket 44. Figure 7 As shown, the gasket 44 is provided with a through hole 440 for avoiding the driving rod 8 so that the driving rod 8 is connected to the connecting block 43.

[0126] The driving rod 8 needs to pass through part of the permanent magnet circuit system 2 and the reset assembly 5 to connect with the diaphragm assembly 7. Figure 7 and Figure 11 As shown in FIG, when two sets of magnet assemblies 21 share one ferrite assembly 22, the ferrite assembly 22 is provided with a first avoidance hole 222 for the driving rod 8 to pass through. Figure 10 As shown, when the two sets of magnet components 21 correspond to one set of iron components 22 respectively, the driving rod 8 is located between the two sets of iron components 22, and there is no need to set the first avoidance hole 222. Figure 10 When the two ends of the spring piece 50 connected to the outer surface of the permanent magnetic circuit system 2 extend beyond the two ends of the permanent magnetic circuit system 2, the spring piece 50 is provided with a second avoidance hole 505 for avoiding the driving rod 8. Figure 17 As shown, when the reset assembly 5 includes two spring clips 50 connected to the outer surface of the permanent magnet magnetic circuit system 2, and the two spring clips 50 are arranged at intervals along the length direction of the magnetic plate assembly 4, the driving rod 8 is located between the two spring clips 50. Therefore, the spring clip 50 does not need to be provided with a second avoidance hole 505.

[0127] The driving rod 8 is connected to the middle of the vibration plate 72, which is beneficial to increasing the vibration amplitude of the vibration plate 72 and improving the volume.

[0128] Next, another variation of the magnetic conductive plate assembly 4 is described with an example.

[0129] In the above description, the magnetic plate assembly 4 includes two magnetic plates 40. The two magnetic plates 40 are independent and their adjacent ends are not directly connected. In the following embodiment, the magnetic plate assembly 4 includes one magnetic plate 40 (or two magnetic plates 40 are integrally formed).

[0130] In some embodiments, as Figure 31 As shown, the magnetic plate assembly 4 includes a magnetic plate 40 that passes through the two coils 3 and extends beyond the ends of the two coils 3. The two sets of magnet assemblies 21 have the same magnetization direction, and the magnetic fields generated by the two coils 3 at the same time are in opposite directions. As a result, the portion of the magnetic plate 40 located between the two coils 3 in the longitudinal direction will be polarized to the north pole or the south pole, generating an attractive or repulsive force in the same direction with the two sets of magnet assemblies 21, thereby generating vibration. The polarity of the portion of the magnetic plate 40 located outside the two coils 3 is opposite to that of the central portion of the magnetic plate 40. Figure 31 In the illustrated embodiment, the middle portion of the magnetic conductive plate 40 is polarized to an S pole, and both ends are polarized to an N pole.

[0131] The driving rod 8 is connected between the diaphragm assembly 7 and the magnetic conductive plate 40 , and specifically, is connected to the middle portion of the magnetic conductive plate 40 .

[0132] When the magnetic conductive plate assembly 4 includes one magnetic conductive plate 40 , its structural strength is better, the number of parts is less, and it is easy to assemble.

[0133] It is understandable that, except for the changed parts of the magnetic conductive plate assembly 4, the structure and connection relationship of the remaining parts of the receiver can refer to the above unless there is any conflict.

[0134] Some embodiments of the present invention further provide an electronic device including the receiver described above. The electronic device may be, for example, a wearable electronic device such as headphones, hearing aids, smart glasses, or a smart helmet. Of course, the device is not limited to wearable electronic devices and may also be, for example, a mobile phone.

[0135] It should be noted that, in the absence of conflict, the various embodiments in this document can be combined with each other to obtain more implementation plans.

[0136] The above is only a specific embodiment of the present invention, and any other improvements made based on the concept of the present invention are considered to be within the protection scope of the present invention.

Claims

1. A receiver, characterized in that: include: A housing assembly (1) is provided with a receiving cavity; A permanent magnetic circuit system (2) is provided in the housing assembly (1) and fixed relative to the housing assembly (1), the permanent magnetic circuit system (2) comprising an ferrite assembly (22) and two groups of magnet assemblies (21), the magnet assemblies (21) forming a magnetic circuit through the ferrite assembly (22), and each group of magnet assemblies (21) comprising two magnets (210) with opposite poles arranged opposite to each other; Two coils (3) are arranged in the housing component (1), and the two coils (3) are respectively located on both sides of the permanent magnet magnetic circuit system (2); A magnetic conductive plate assembly (4) is provided inside the two coils (3) and is located between the two magnets (210) of the magnet assembly (21); a reset assembly (5), connected between the magnetic plate assembly (4) and the permanent magnetic circuit system (2); and The diaphragm assembly (7) is arranged in the housing assembly (1) and divides the accommodating cavity into a front cavity (13) and a rear cavity (14). The diaphragm assembly (7) is connected to the magnetic plate assembly (4) via a driving rod (8).

2. The receiver according to claim 1, wherein It comprises a spacer (60) located between the permanent magnetic circuit system (2) and the housing assembly (1); the spacer (60) is connected to the permanent magnetic circuit system (2) and / or the reset assembly (5); in the vibration direction of the magnetic conductive plate assembly (4), a vibration space is formed between the permanent magnetic circuit system (2) and the inner wall of the housing assembly (1) through the spacer (60).

3. The receiver according to claim 1, wherein The two groups of magnet assemblies (21) are spaced apart along the length direction of the magnetic conductive plate assembly (4), and the two magnets (210) of each group of magnet assemblies (21) are located on both sides of the thickness direction of the magnetic conductive plate assembly (4), and the thickness direction of the magnetic conductive plate assembly (4) is consistent with the vibration direction of the magnetic conductive plate assembly (4).

4. The receiver according to claim 1, wherein The magnetization directions of the magnets (210) of the two groups of magnet assemblies (21) are the same, and the two magnetic poles of the magnets (210) are arranged along the vibration direction of the magnetic conductive plate assembly (4).

5. The receiver according to claim 4, wherein The magnetic conductive plate assembly (4) comprises a magnetic conductive plate (40) with both ends extending beyond the outside of the two coils (3), and the magnetic fields generated by the two coils (3) at the same time are in opposite directions.

6. The receiver according to claim 1, wherein The magnetic conductive plate assembly (4) comprises two magnetic conductive plates (40) respectively inserted into the two coils (3), and the magnetic conductive plates (40) extend between two magnets (210) of the magnet assembly (21) adjacent to the coils (3) inserted therethrough, the adjacent ends of the two magnetic conductive plates (40) are not directly magnetically connected, and the two magnetic poles of the magnets (210) are arranged along the vibration direction of the magnetic conductive plate assembly (4); The magnets (210) of the two sets of magnet assemblies (21) have the same magnetizing direction, and the magnetic fields generated by the two coils (3) at the same time are in opposite directions; or, The magnetization directions of the magnets (210) of the two groups of magnet assemblies (21) are opposite, and the magnetic fields generated by the two coils (3) at the same time are in the same direction.

7. The receiver according to claim 6, wherein The two magnetic conductive plates (40) are spaced apart along the length direction of the magnetic conductive plate assembly (4), and are connected via a connecting block (43). The connecting block (43) is made of a non-magnetic conductive material. The diaphragm assembly (7) and the connecting block (43) are connected via a driving rod (8). The driving rod (8) passes through a portion of the permanent magnet magnetic circuit system (2) and the reset assembly (5).

8. The receiver according to claim 7, wherein A gasket (44) made of non-magnetic material is provided on the surface of the magnetic conductive plate (40) facing the magnet (210), and the gasket (44) connects the two magnetic conductive plates (40) and extends between the magnetic conductive plates (40) and the magnet (210). The hardness of the gasket (44) is less than the hardness of the magnet (210), and the gasket (44) close to the side where the diaphragm assembly (7) is located is provided with a through hole (440) for the driving rod (8) to pass through.

9. The receiver according to claim 6, wherein A gasket (44) made of non-magnetic material is provided on the surface of the magnetic conductive plate (40) facing the magnet (210), the gasket (44) connects the two magnetic conductive plates (40) and extends between the magnetic conductive plates (40) and the magnet (210), the gasket (44) is made of a hard material, and the hardness is less than the hardness of the magnet (210), the diaphragm assembly (7) and the gasket (44) are connected via the driving rod (8), and the driving rod (8) passes through part of the permanent magnet magnetic circuit system (2) and the reset assembly (5).

10. The receiver according to any one of claims 2 to 9, characterized in that The reset component (5) includes a spring piece (50), which is connected to the outer surface of the permanent magnet magnetic circuit system (2) in the vibration direction of the magnetic plate assembly (4) away from the magnetic plate (40) and extends toward the side where the coil (3) is located. The two ends of the reset component (5) are respectively located on both sides of the two coils (3) in the length direction of the magnetic plate assembly (4) and are connected to the magnetic plate (40).

11. The receiver according to claim 10, wherein The reset assembly (5) comprises two fixing plates (51) located at both ends thereof and a connecting plate (52) connected between the spring plate (50) and the fixing plates (51); the two fixing plates (51) are respectively located on both sides of the two coils (3) in the length direction of the magnetic conductive plate assembly (4) and are connected to the magnetic conductive plate (40); and the reset assembly (5) is formed by integrally bending a metal sheet.

12. The receiver according to claim 10, wherein The spring piece (50) is connected to the outer surface of the permanent magnet magnetic circuit system (2) facing away from the magnetic plate (40) in the vibration direction of the magnetic plate assembly (4); the reset assembly (5) includes two connecting plates (53) respectively located at both ends of the two coils (3) along the length direction of the magnetic plate assembly (4); the connecting plates (53) are connected between the spring piece (50) and the magnetic plate (40).

13. The receiver according to any one of claims 1 to 9, characterized in that The spring piece (50) is connected to the outer surface of the permanent magnetic circuit system (2) away from the magnetic plate assembly (4) in the vibration direction of the magnetic plate assembly (4), and the two ends of the spring piece (50) respectively extend toward the sides where the two coils (3) are located. The reset assembly (5) exceeds the two ends of the two coils (3) in the length direction of the magnetic plate assembly (4), and the spring piece (50) has a suspended portion (501) arranged opposite to the coil (3).

14. The receiver according to claim 1, wherein The reset assembly (5) includes at least two spring pieces (50) located on the same side of the magnetic plate assembly (4), and the two spring pieces (50) are connected to the outer surface of the permanent magnet magnetic circuit system (2) away from the magnetic plate assembly (4) in the vibration direction of the magnetic plate assembly (4), and the two spring pieces (50) extend toward the sides where the two coils (3) are located respectively. The reset assembly (5) extends in the length direction of the magnetic plate assembly (4) to exceed the two ends of the two coils (3), and the spring piece (50) has a suspended portion (501) arranged opposite to the coil (3).

15. The receiver according to any one of claims 1 to 9, characterized in that The coil (3) is connected to the outer side surface of the permanent magnetic circuit system (2), and is relatively fixed to the permanent magnetic circuit system (2); or, The coil (3) is connected to the reset assembly (5), and is relatively fixed to the magnetic conductive plate assembly (4).

16. The receiver according to any one of claims 1 to 9, characterized in that The diaphragm assembly (7) comprises a fixed frame (70) connected to the housing assembly (1), a vibration plate (72) located in the fixed frame (70) and movably connected to the fixed frame (70), and a diaphragm (73) covered on the fixed frame (70) and the vibration plate (72); the driving rod (8) is connected between the vibration plate (72) and the magnetic plate assembly (4); the housing assembly (1) is provided with a sound outlet (12); the sound outlet (12) and the permanent magnet magnetic circuit system (2) are respectively located on both sides of the diaphragm assembly (7); the sound outlet (12) and the front cavity (13) are connected.

17. The receiver according to claim 16, wherein The driving rod (8) is connected to the middle portion of the magnetic conductive plate assembly (4) and the vibration plate (72), and is inserted between the two groups of magnet assemblies (21).

18. The receiver according to any one of claims 1 to 9, characterized in that The housing assembly (1) is made of a magnetically conductive material, the ferrite assembly (22) is provided with a channel (221) penetrating along the length direction of the magnetic plate assembly (4), and the two magnets (210) of the magnet assembly (21) are both connected to the inner surface of the ferrite assembly (22).

19. An electronic device, characterized in that: Comprising the receiver according to any one of claims 1 to 18.

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