A receiver

Abstract

The present invention provides a receiver, which includes: a housing having a hollow inner cavity; a diaphragm mechanism, which is arranged in the hollow inner cavity and divides the hollow inner cavity into a first cavity and a second cavity, the diaphragm mechanism includes a vibration plate, the fixed end of the vibration plate is fixed to the inner wall of the housing, and the free end of the vibration plate is suspended in the hollow inner cavity; an electromagnetic drive mechanism, which is arranged in the hollow inner cavity, and includes at least one coil assembly and at least one magnetic field assembly, wherein each magnetic field assembly is arranged in the first cavity or the second cavity, and the magnetic field assembly is close to the free end of the vibration plate; each coil assembly is arranged in the first cavity or the second cavity, and the coil assembly is close to the fixed end of the vibration plate. Compared with the prior art, the receiver in the present invention reduces the connection between moving parts, thereby simplifying the assembly process and reducing the manufacturing cost.

Description

[Technical field]

[0001] The invention belongs to the technical field of electroacoustic conversion, and in particular relates to a receiver. [Background technology]

[0002] A receiver, also called an earpiece, is an electroacoustic device that converts audio electrical signals into sound signals without sound leakage. It is widely used in communication terminal equipment such as mobile phones, landlines and hearing aids to achieve audio output.

[0003] Please refer to Figure 1 As shown, it is a receiver in the prior art, which includes a housing 110, a diaphragm 120 and an electromagnetic drive mechanism, wherein the diaphragm 120 is arranged in the housing 110 and divides the inner cavity of the housing into a front cavity and a rear cavity, and the electromagnetic drive mechanism is fixed in the rear cavity. The electromagnetic drive mechanism includes a drive rod 130, a reed (or armature) 140, two permanent magnets 150 and a coil 160, wherein one end of the reed 140 is fixed on the inner wall surface of the side wall of the housing 110, and the other end is connected to the diaphragm 120 through the drive rod 130; the coil 160 is sleeved on the reed 140 and close to the U-shaped arc transition portion of the reed 140, and the two permanent magnets 150 are respectively located on the upper and lower sides of the end of the reed 140 close to the drive rod 130 and fixed on the inner wall surface of the housing 110.

[0004] because Figure 1 In the receiver shown, the reed 140 and the diaphragm 120 need to be connected by a driving rod 130 (or a driving plate). The design using the driving rod 130 (or a driving plate) is very difficult to assemble, has low assembly efficiency, is difficult to achieve automated production, requires high skills from employees, has an unstable process, and the control of assembly quality will affect product reliability. The high rework rate may even cause scrapping, which is not conducive to reducing manufacturing costs.

[0005] Therefore, it is necessary to propose an improved technical solution to overcome the above problems. [Summary of the invention]

[0006] The object of the present invention is to provide a receiver which reduces the connections between moving parts, thereby simplifying the assembly process and reducing the manufacturing cost.

[0007] According to one aspect of the present invention, there is provided a receiver, comprising: a housing having a hollow inner cavity; a diaphragm mechanism disposed in the hollow inner cavity to divide the hollow inner cavity into a first cavity and a second cavity, the diaphragm mechanism comprising a vibration plate, a fixed end of the vibration plate being fixed to an inner wall of the housing, and a free end of the vibration plate being suspended in the hollow inner cavity; an electromagnetic drive mechanism disposed in the hollow inner cavity, comprising at least one coil assembly and at least one magnetic field assembly, wherein each magnetic field assembly is disposed in the first cavity or the second cavity, and the magnetic field assembly is close to the free end of the vibration plate; each coil assembly is disposed in the first cavity or the second cavity, and the coil assembly is close to the fixed end of the vibration plate.

[0008] Furthermore, the magnetic field assembly is used to generate a fixed magnetic field; the coil assembly generates an alternating magnetic field when energized; the vibration plate is a magnetic conductive material, and the alternating magnetic field generated when the coil assembly is energized is introduced into the vibration plate.

[0009] Furthermore, the outer shell includes a first shell formed by a first bottom surface and a side wall, and a second shell formed by a second bottom surface and a side wall, and the first shell and the second shell are interlocked with each other to form the hollow inner cavity; the diaphragm mechanism divides the hollow inner cavity into a first cavity close to the first bottom surface and a second cavity close to the second bottom surface.

[0010] Furthermore, the diaphragm mechanism also includes a fixed frame and a sound-producing membrane, wherein the fixed frame is fixed on the side wall of the outer shell, and has an inner cavity that runs through the thickness direction of the fixed frame; the fixed end of the vibration plate is fixed to the inner side of the fixed frame, and the free end of the vibration plate is suspended from the fixed frame, and a reserved gap is formed between the free end of the vibration plate and the fixed frame; the sound-producing membrane is attached to one side surface of the fixed frame and at least seals the reserved gap.

[0011] Furthermore, the pronunciation membrane is provided with a protrusion corresponding to the reserved gap; the fixing frame is made of non-magnetic material; and the first shell and the second shell are both made of magnetic material.

[0012] Furthermore, the electromagnetic drive mechanism includes: a first coil assembly disposed in the second cavity and close to the fixed end of the vibration plate; a first magnetic field assembly disposed in the second cavity and close to the free end of the vibration plate; and a second magnetic field assembly disposed in the first cavity and close to the free end of the vibration plate.

[0013] Furthermore, the first coil assembly includes a first magnetic core and a first coil, the first coil is arranged on the second bottom surface of the second shell, one end of the first magnetic core is sleeved in the hollow inner hole of the first coil, and the other end thereof extends out of the hollow inner hole of the first coil and is connected to the fixed end of the vibration plate, and the magnetic core is flat or round.

[0014] Furthermore, the receiver also includes a fixed block, which is located in the first cavity, one end of which is arranged on the first bottom surface of the first shell, and the other end presses the fixed end of the vibration plate; or the electromagnetic drive mechanism also includes a second coil assembly, the second coil assembly is arranged in the first cavity and close to the fixed end of the vibration plate, the second coil assembly includes a second magnetic core and a second coil, the second coil is arranged on the first bottom surface of the first shell, one end of the second magnetic core is sleeved in the hollow inner hole of the second coil, and the other end extends out of the hollow inner hole of the second coil and is connected to the fixed end of the vibration plate, and the magnetic core is flat or round.

[0015] Furthermore, the first magnetic field component includes a first magnetic field generating component and a first magnetic conductive block for generating a fixed magnetic field, and the first magnetic conductive block is arranged on the second bottom surface of the second shell; the first magnetic field generating component is arranged on the first magnetic conductive block and faces the free end of the vibration plate; or the first magnetic field component includes a first magnetic field generating component for generating a fixed magnetic field, and the first magnetic field generating component is directly arranged on the second bottom surface of the second shell and faces the free end of the vibration plate.

[0016] Furthermore, the second magnetic field component includes a second magnetic field generating component and a second magnetic conductive block for generating a fixed magnetic field, and the second magnetic conductive block is arranged on the first bottom surface of the first shell; the second magnetic field generating component is arranged on the second magnetic conductive block and faces the free end of the vibration plate; or the second magnetic field component includes a second magnetic field generating component for generating a fixed magnetic field, and the second magnetic field generating component is directly arranged on the first bottom surface of the first shell and faces the free end of the vibration plate.

[0017] Furthermore, the area on the first bottom surface of the first shell for placing the second magnetic field component protrudes into the first shell relative to other areas of the first bottom surface to form a first boss, and the second magnetic field component is placed on the first boss; the area on the second bottom surface of the second shell for placing the first magnetic field component protrudes into the second shell relative to other areas of the second bottom surface to form a second boss, and the first magnetic field component is placed on the second boss.

[0018] Compared with the prior art, the vibration plate in the present invention is made of magnetic conductive material, and the fixed end of the vibration plate is connected to the coil assembly, so that the AC magnetic field generated when the coil is energized enters the vibration plate and acts with the DC magnetic field to generate a driving force to push the vibration plate to vibrate and produce sound. No additional driving rod and reed are required, thereby reducing the connection between moving parts, simplifying the assembly process, and reducing manufacturing costs.

Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0020] Figure 1 It is a structural schematic diagram of a receiver in the prior art;

[0021] Figure 2 is a longitudinal cross-sectional schematic diagram of a receiver in a first embodiment of the present invention;

[0022] Figure 3 for Figure 2 An exploded schematic diagram of a diaphragm mechanism in one embodiment;

[0023] Figure 4 for Figure 2 An exploded schematic diagram of the receiver shown;

[0024] Figure 5 is a longitudinal cross-sectional schematic diagram of a receiver in a second embodiment of the present invention;

[0025] Figure 6 for Figure 5 An exploded schematic diagram of the receiver shown;

[0026] Figure 7 is a longitudinal cross-sectional schematic diagram of a receiver in a third embodiment of the present invention;

[0027] Figure 8 for Figure 7 An exploded schematic diagram of the receiver shown;

[0028] Fig. 9 is a longitudinal cross-sectional schematic diagram of a receiver in a fourth embodiment of the present invention;

[0029] Fig.10 for Fig. 9 An exploded schematic diagram of the receiver shown;

[0030] Fig.11 is a longitudinal cross-sectional schematic diagram of a receiver in a fifth embodiment of the present invention;

[0031] Fig.12 for Fig.11 An exploded view of the receiver is shown. [Specific implementation method]

[0032] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] The term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments. Unless otherwise specified, the words "connected", "connected", and "connected" herein that indicate electrical connection all refer to direct or indirect electrical connection.

[0034] Please refer to Figure 2 , which is a schematic longitudinal cross-sectional view of a receiver in a first embodiment of the present invention. Figure 2 The receiver shown includes: a housing 210, a diaphragm mechanism 230 and an electromagnetic driving mechanism (not labeled).

[0035] The housing 210 has a hollow inner cavity 220. The diaphragm mechanism 230 is disposed in the hollow inner cavity 220 and divides the hollow inner cavity 220 into a first cavity 222 and a second cavity 224. The diaphragm mechanism 230 includes a vibration plate 232, a fixed end of the vibration plate 232 is fixed to the inner wall of the housing 210, and a free end of the vibration plate 232 is suspended in the hollow inner cavity 220.

[0036] The electromagnetic drive mechanism is disposed in the hollow inner cavity 220, and includes at least one coil assembly 242 and at least one magnetic field assembly 244, 246. The magnetic field assembly 246, 244 is disposed in the first cavity 222 or the second cavity 224, and the magnetic field assembly 244, 246 is close to the free end of the vibration plate 232; the coil assembly 242 is disposed in the first cavity 222 or the second cavity 224, and the coil assembly 242 is close to the fixed end of the vibration plate 232.

[0037] exist Figure 2 In the specific embodiment shown, the housing 210 includes a first shell 212 surrounded by a first bottom surface and side walls, and a second shell 214 surrounded by a second bottom surface and side walls. The first shell 212 and the second shell 214 are mutually buckled to form the hollow inner cavity 220. For example, the first shell 212 and the second shell 214 are fixedly connected by gluing or welding. In a preferred embodiment, the first shell 212 and the second shell 214 are both made of magnetic conductive materials.

[0038] exist Figure 2 In the specific embodiment shown, the diaphragm mechanism 230 is disposed in the first shell 212 , which divides the hollow inner cavity 220 into a first cavity 222 close to the first bottom surface and a second cavity 224 close to the second bottom surface.

[0039] Please refer to Figure 3 As shown, it is Figure 2 FIG. 1 is an exploded schematic diagram of a diaphragm mechanism in one embodiment. Figure 2 and Figure 3 As shown, the diaphragm mechanism 230 includes a vibration plate 232, a fixed frame 234 and a sound-generating membrane 236. The fixed frame 234 is fixed on the inner side of the side wall of the first shell 212, and has an inner cavity 2342 that runs through the thickness direction of the fixed frame 234. The fixed frame 234 is made of non-magnetic material, which can be stainless steel, aluminum or other non-magnetic metal or non-metal material. The fixed end 2322 of the vibration plate 232 is fixed to the inner side of the fixed frame 234, and its free end 2324 is suspended in the fixed frame 234; a reserved gap 238 is formed between the outer surface of the free end 2324 of the vibration plate 232 and the inner surface of the fixed frame 234. The sound-generating membrane 236 is pre-attached to the side surface of the fixed frame 234 facing the first cavity 222 independently of the shell 210, and at least seals the reserved gap 238 formed between the free end 2324 of the vibration plate 232 and the fixed frame 234.

[0040] exist Figure 3 In the illustrated embodiment, the sounding membrane 236 is provided with a protrusion 2362 facing the second cavity 224 at a position corresponding to the reserved gap 238. Due to the provision of the protrusion 2362, when the vibration plate 232 drives the sounding membrane 236 to vibrate, the sounding membrane can more easily vibrate together with the vibration plate. In an optional embodiment, the sounding membrane 236 can also be pre-attached to a side surface of the fixed frame 234 facing the second cavity 224, in which case the protrusion 2362 faces the first cavity 223.

[0041] exist Figure 2 In the specific embodiment shown, the electromagnetic drive mechanism includes a first coil assembly 242 disposed in the second cavity 224 and close to the fixed end 2322 of the vibration plate 232, a first magnetic field assembly 244 disposed in the second cavity 224 and close to the free end 2324 of the vibration plate 232, and a second magnetic field assembly 246 disposed in the first cavity 222 and close to the free end 2324 of the vibration plate 232. The first magnetic field assembly 244 is opposite to the second magnetic field assembly 246, and the coil assembly 242 and the magnetic field assemblies 244 and 246 are spaced apart from each other.

[0042] exist Figure 2In the specific embodiment shown, the first coil assembly 242 includes a first magnetic core 2422 and a first coil 2424. The first coil 2424 is disposed on the second bottom surface of the second shell 214. One end of the first magnetic core 2422 is sleeved in the hollow inner hole of the first coil 2424, and the other end thereof extends out of the hollow inner hole of the first coil 2424 and is connected to the fixed end 2322 of the vibration plate 232. The first magnetic core 2422 is preferably an iron core. The first magnetic field assembly 244 includes a first magnetic field generating member 2442 and a first magnetic conductive block 2444 for generating a fixed magnetic field. The first magnetic conductive block 2444 is fixed on the second bottom surface of the second shell 214. The first magnetic field generating member 2442 is fixed on the first magnetic conductive block 2444 and faces the free end 2324 of the vibration plate 232. A required gap is reserved between the first magnetic field generating member 2442 and the free end 2324 of the vibration plate 232. The second magnetic field assembly 246 only includes a second magnetic field generating member 2462 for generating a fixed magnetic field. The second magnetic field generating member 2462 is directly fixed on the first bottom surface of the first shell 212 and faces the free end 2324 of the vibration plate 232 (or directly facing the first magnetic field generating member 2442), and a required gap is reserved between the second magnetic field generating member 2462 and the free end 2324 of the vibration plate 232. The magnetic core is flat or circular. When the magnetic core is flat, the direction of the short diameter of the flat shape is the length direction of the vibration plate, and the direction of the long diameter of the flat shape is the width direction of the vibration plate. In this way, the entire coil assembly is closer to the fixed end of the vibration plate. When the size of the shell remains unchanged, the vibration end is extended, the stiffness of the vibration end is reduced, and the sensitivity is improved.

[0043] In a preferred embodiment, the magnetic field generating members 2442 and 2462 are permanent magnets. In one embodiment, the first coil assembly 242 may include only the first coil 2424, which is directly connected to the fixed end 2322 of the vibration plate 232, so that the AC magnetic field generated by the first coil 2424 when powered on can enter the vibration plate 232. In one embodiment, there may be only the first magnetic field assembly 244 or only the second magnetic field assembly 246.

[0044] Figure 2 The principle of the electromagnetic drive mechanism shown driving the vibration plate 232 to vibrate is: when alternating current is passed through the first coil 2424, the generated alternating magnetic field enters the vibration plate 232 through the first magnetic core 2422, so that the vibration plate 232 has polarity, and under the action of the fixed magnetic field generated by the magnetic field generating parts 2442 and 2462, the vibration plate 232 vibrates reciprocatingly in the vertical direction, thereby driving the sound-generating membrane 236 to agitate the air to make sound.

[0045] In summary, Figure 1 Compared to the receiver shown, Figure 2The receiver shown does not use the drive rod 130 and the reed 140. Figure 2 The vibration plate 232 is made of magnetic conductive material, and its fixed end 2322 is connected to the coil assembly 242. When the coil 2424 is energized, the AC magnetic field generated directly acts on the vibration plate 232 and the fixed magnetic field generated by the magnetic field generating parts 2442 and 2462, generating a driving force to drive the vibration plate 232 to vibrate and produce sound. In other words, the vibration plate 232 made of magnetic conductive material in the present invention has the function of a reed, that is, the vibration plate 232 and the reed are combined into one in the present invention, and no additional driving rod and reed are required, thereby reducing the connection between the moving parts, simplifying the assembly process, and reducing the manufacturing cost.

[0046] Please refer to Figure 4 As shown, it is Figure 2 An exploded view of the receiver is shown. Figure 1 compared to, Figure 2 and Figure 4 The components inside the receiver shown are clearly layered, and its stacked design makes the assembly process simple and very suitable for automated production.

[0047] Please refer to Figure 5 , which is a longitudinal cross-sectional schematic diagram of a receiver in a second embodiment of the present invention. Figure 2 Compared to the receiver shown, Figure 5 The receiver shown in the figure is additionally provided with a fixing block 250, which is located in the first cavity 222, with one end of the fixing block 250 fixed to the first bottom surface of the first shell 212, and the other end of the fixing block 250 facing the magnetic core 2422 to compress the fixing end 2322 of the vibration plate 232, thereby improving the stability of the fixing end 2322. Figure 6 As shown, it is Figure 5 An exploded view of the receiver is shown.

[0048] Please refer to Figure 7 As shown, it is a schematic longitudinal cross-sectional view of a receiver in a third embodiment of the present invention, wherein the electromagnetic drive mechanism is a double-coil design. Figure 7 The receiver shown is Figure 2 The main differences between the receivers shown are: Figure 7 The electromagnetic drive mechanism further includes a second coil assembly 248; Figure 7 The second magnetic field assembly 746 further includes a second magnetic conductive block 7464 ; the vibration plate 232 is disposed between the openings of the first shell 212 and the second shell 214 .

[0049] exist Figure 7In the specific embodiment shown, the second coil assembly 248 is disposed in the first cavity 222 and close to the fixed end 2322 of the vibration plate 232. The second coil assembly 248 includes a second magnetic core 2482 and a second coil 2484, wherein the second coil 2484 is disposed on the first bottom surface of the first housing 212, one end of the second magnetic core 2482 is sleeved in the hollow inner hole of the second coil 2484, and the other end thereof extends out of the hollow inner hole of the second coil 2484 and is connected to the fixed end 2322 of the vibration plate 232. The second magnetic field assembly 746 includes a second magnetic field generating component 7462 for generating a fixed magnetic field and a second magnetic conductive block 7464. The second magnetic conductive block 7464 is fixed on the first bottom surface of the first shell 212. The second magnetic field generating component 7462 is fixed on the second magnetic conductive block 7464 and faces the free end 2324 of the vibration plate 232 (or is directly opposite to the first magnetic field generating component 2442). A required gap is reserved between the second magnetic field generating component 7462 and the free end 2324 of the vibration plate 232.

[0050] Figure 7 The electromagnetic drive mechanism in the embodiment is a double coil design, which can not only more effectively drive the vibration plate 232 to vibrate and increase the sensitivity of the receiver, but also the two magnetic cores 2482 and 2422 can press the fixed end 2322 of the vibration plate 232, thereby improving the stability of the fixed end 2322. Please refer to Figure 8 As shown, it is Figure 7 An exploded view of the receiver is shown.

[0051] Please refer to Fig. 9 As shown, it is a schematic longitudinal cross-sectional view of a receiver in a fourth embodiment of the present invention, and its electromagnetic driving mechanism is also a double-coil design. Fig. 9 The receiver shown is Figure 7 The main differences between the receivers shown are: Fig. 9 The first magnetic field component 944 in the embodiment only includes a first magnetic field generating member 9442, which is directly fixed on the second bottom surface of the second shell 214 and faces the free end 2324 of the vibration plate 232, and a required gap is reserved between the first magnetic field generating member 9442 and the free end 2324 of the vibration plate 232; the second magnetic field component 946 only includes a second magnetic field generating member 9462, which is directly fixed on the first bottom surface of the first shell 211 and faces the free end 2324 of the vibration plate 232, and a required gap is reserved between the second magnetic field generating member 9462 and the free end 2324 of the vibration plate 232, wherein the first magnetic field generating member 9442 and the second magnetic field generating member 9462 are placed opposite to each other. In other words, Fig. 9The receiver shown in the figure increases the thickness of the magnetic field generating member, and installs the thickened magnetic field generating members 9442 and 9462 on the housing 210, without the need to set up additional magnetic conductive blocks. Fig.10 As shown, it is Fig. 9 An exploded view of the receiver is shown.

[0052] Please refer to Fig.11 As shown, it is a schematic longitudinal cross-sectional view of a receiver in a fifth embodiment of the present invention, and its electromagnetic driving mechanism is also a double-coil design. Fig.11 The receiver shown is Figure 7 The main differences between the receivers shown are: Fig.11 In the embodiment, the area on the first bottom surface of the first shell 212 for placing the second magnetic field generating member 1462 protrudes into the first shell 212 relative to other areas of the first bottom surface to form a first boss 2122, and the second magnetic field generating member 1462 is placed on the first boss 2122; the area on the second bottom surface of the second shell 214 for placing the first magnetic field generating member 1442 protrudes into the second shell 215 relative to other areas of the second bottom surface to form a second boss 2142, and the first magnetic field generating member 1442 is directly placed on the second boss 2142. In this way, Fig.11 The receiver shown in the figure does not need to increase the thickness of the magnetic field generating elements 1442 and 1462, and the magnetic conductive block can also be omitted. Fig.12 As shown, it is Fig.11 An exploded view of the receiver is shown.

[0053] In summary, the vibration plate 232 made of magnetic conductive material in the present invention has the function of a reed, that is, the vibration plate 232 and the reed are combined into one, and no additional driving rod and reed are required. As a result, the receiver in the present invention has the following advantages or beneficial effects:

[0054] (1) The components inside the receiver are clearly layered, and its stacked design makes the assembly process simple, which is very suitable for automated production;

[0055] (2) It reduces the number of connections between moving parts (e.g., drive rods and reeds), resulting in higher reliability;

[0056] (3) Fewer components and simpler assembly processes lead to higher production efficiency.

[0057] (4) Fewer components and simpler assembly processes help reduce costs.

[0058] In the present invention, words such as “connect”, “connected”, “connected”, “connected”, etc. indicating electrical connection, if not otherwise specified, indicate direct or indirect electrical connection.

[0059] It should be noted that any changes made by those skilled in the art to the specific embodiments of the present invention do not deviate from the scope of the claims of the present invention. Accordingly, the scope of the claims of the present invention is not limited to the above specific embodiments.

Claims

1. A receiver, characterized in that: It includes: a housing having a hollow interior; A diaphragm mechanism is disposed in the hollow inner cavity, dividing the hollow inner cavity into a first cavity and a second cavity, the diaphragm mechanism comprises a diaphragm, a fixed end of the diaphragm is fixed to the inner wall of the shell, and a free end of the diaphragm is suspended in the hollow inner cavity; The electromagnetic drive mechanism is arranged in the hollow inner cavity, and comprises at least one coil assembly and at least one magnetic field assembly, wherein each magnetic field assembly is arranged in the first cavity or the second cavity, and the magnetic field assembly is close to the free end of the vibration plate; each coil assembly is arranged in the first cavity or the second cavity, and the coil assembly is close to the fixed end of the vibration plate, The housing comprises a first shell formed by a first bottom surface and a side wall, and a second shell formed by a second bottom surface and a side wall, the first shell and the second shell are buckled together to enclose the hollow inner cavity; The electromagnetic drive mechanism comprises: A first coil assembly disposed in the second cavity and close to the fixed end of the vibration plate; The first coil assembly includes a first magnetic core and a first coil, The first coil is arranged on the second bottom surface of the second shell, one end of the first magnetic core is sleeved in the hollow inner hole of the first coil, and the other end thereof extends out of the hollow inner hole of the first coil and is connected to the fixed end of the vibration plate.

2. The receiver according to claim 1, characterized in that The magnetic field component is used to generate a fixed magnetic field; The coil assembly generates an alternating magnetic field when energized; The vibration plate is made of magnetic conductive material, and the alternating magnetic field generated when the coil assembly is energized is introduced into the vibration plate.

3. The receiver according to claim 1, characterized in that The diaphragm mechanism divides the hollow inner cavity into a first cavity close to the first bottom surface and a second cavity close to the second bottom surface.

4. The receiver according to claim 3, characterized in that: The diaphragm mechanism also includes a fixing frame and a sound-generating membrane. The fixing frame is fixed on the side wall of the shell, and has an inner cavity that runs through the thickness direction of the fixing frame; The fixed end of the vibration plate is fixed to the inner side of the fixing frame, and the free end of the vibration plate is suspended from the fixing frame, and a reserved gap is formed between the free end of the vibration plate and the fixing frame; The sounding membrane is attached to a side surface of the fixing frame and at least seals the reserved gap.

5. The receiver according to claim 4, characterized in that: The pronunciation membrane is provided with a protrusion at a position corresponding to the reserved gap; The fixing frame is made of non-magnetic material; The first shell and the second shell are both made of magnetic conductive material.

6. The receiver according to claim 3, characterized in that: The electromagnetic drive mechanism also includes: A first magnetic field component disposed in the second cavity and close to the free end of the vibration plate; A second magnetic field component is disposed in the first cavity and close to the free end of the vibration plate.

7. The receiver according to claim 6, characterized in that: The magnetic core is flat or round.

8. The receiver according to claim 6, characterized in that The receiver further comprises a fixing block, which is located in the first cavity, one end of which is arranged on the first bottom surface of the first shell, and the other end of which presses the fixing end of the vibration plate; or The electromagnetic drive mechanism further includes a second coil assembly, which is disposed in the first cavity and close to the fixed end of the vibration plate. The second coil assembly includes a second magnetic core and a second coil. The second coil is disposed on the first bottom surface of the first shell. One end of the second magnetic core is sleeved in the hollow inner hole of the second coil, and the other end thereof extends out of the hollow inner hole of the second coil and is connected to the fixed end of the vibration plate. The magnetic core is flat or round.

9. The receiver according to claim 6, characterized in that: The first magnetic field assembly includes a first magnetic field generating member for generating a fixed magnetic field and a first magnetic conductive block, wherein the first magnetic conductive block is disposed on the second bottom surface of the second housing; the first magnetic field generating member is disposed on the first magnetic conductive block and faces the free end of the vibration plate; or The first magnetic field assembly includes a first magnetic field generating member for generating a fixed magnetic field. The first magnetic field generating member is directly disposed on the second bottom surface of the second shell and faces the free end of the vibration plate.

10. The receiver according to claim 6, characterized in that The second magnetic field assembly includes a second magnetic field generating member generating a fixed magnetic field and a second magnetic conductive block, wherein the second magnetic conductive block is disposed on the first bottom surface of the first housing; the second magnetic field generating member is disposed on the second magnetic conductive block and faces the free end of the vibration plate; or The second magnetic field assembly includes a second magnetic field generating member for generating a fixed magnetic field. The second magnetic field generating member is directly disposed on the first bottom surface of the first housing and faces the free end of the vibration plate.

11. The receiver according to claim 6, characterized in that: An area on the first bottom surface of the first shell for placing the second magnetic field component protrudes into the first shell relative to other areas of the first bottom surface to form a first boss, and the second magnetic field component is placed on the first boss; An area on the second bottom surface of the second shell for placing the first magnetic field component protrudes into the second shell relative to other areas of the second bottom surface to form a second boss, and the first magnetic field component is placed on the second boss.

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