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 connected 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, the coil assembly is close to the fixed end of the vibration plate, and a predetermined gap is arranged between the coil assembly and the fixed end of the vibration plate. Compared with the prior art, the present invention can reduce 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 of 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 the reliability of the product. The high rework rate may even cause scrapping, which is not conducive to reducing manufacturing costs. In addition, since the reed 140 after heat treatment is easily deformed when impacted, a slight deformation of the reed 140 will have a great impact on product performance, and may even cause product failure and irreparable failure.

[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 connected 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, the coil assembly is close to the fixed end of the vibration plate, and a predetermined gap is provided between the coil assembly and 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 connected to the inner side of the fixed frame, and the free end of the vibration plate is suspended from the fixed frame, and a first 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 first 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 has been subjected to spring tempering treatment; 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 separated from the fixed end of the vibration plate by the predetermined gap.

[0014] Furthermore, the diaphragm mechanism also includes a hinge, and the fixed end of the diaphragm is hinged to the inner side of the fixed frame through the hinge, a second gap is formed between the fixed end of the diaphragm and the fixed frame, and the sounding membrane covers the second gap.

[0015] Furthermore, the hinge is arranged on the inner side of the fixing frame, and the fixing end of the vibration plate is provided with a notch matching the hinge.

[0016] Furthermore, the hinge includes a torsion beam and a cantilever beam, and the width, length and / or thickness of the hinge is adjusted by the torsion beam and the cantilever beam to adjust the vibration parameters.

[0017] Compared with the prior art, the vibration plate in the present invention is made of magnetic conductive material, the fixed end of the vibration plate is adjacent to the coil assembly, and a predetermined interval is arranged between the fixed end of the vibration plate and 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, without the need for additional driving rods and reeds, thereby reducing the connection between moving parts, simplifying the assembly process, and reducing manufacturing costs.

Brief Description of the Drawings

[0018] 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:

[0019] Figure 1 It is a structural schematic diagram of a receiver in the prior art;

[0020] Figure 2 is a longitudinal cross-sectional schematic diagram of a receiver in a first embodiment of the present invention;

[0021] Figure 3 for Figure 2 A schematic structural diagram of a diaphragm mechanism in one embodiment;

[0022] Figure 4 for Figure 3 An exploded schematic diagram of the diaphragm mechanism shown;

[0023] Figure 5 for Figure 2 An exploded view of the receiver is shown. [Specific implementation method]

[0024] 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.

[0025] 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.

[0026] Please refer to Figure 2 As shown, it is a schematic longitudinal cross-sectional view of a receiver in one embodiment of the present invention.

[0027] Figure 2 The receiver shown includes: a housing 210, a diaphragm mechanism 230 and an electromagnetic driving mechanism (not labeled).

[0028] 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 connected 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.

[0029] 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, and a predetermined gap 250 is provided between the coil assembly 242 and the fixed end of the vibration plate 232. In the present invention, in order to make the vibration plate 232 have less resistance when working, the fixed end of the vibration plate 232 is not connected to the coil component 242, but a small gap (i.e., the predetermined gap 250) is retained. The AC magnetic field generated when the coil component 242 is energized directly generates a driving force through the vibration plate 232 and the DC magnetic field (i.e., the magnetic field generated by the magnetic field components 244 and 246) to push the vibration plate 232 to vibrate and produce sound.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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 separated from the fixed end 2322 of the vibration plate 232 by a predetermined gap 250. 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 component 2462 that generates a fixed magnetic field. The second magnetic field generating component 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 is directly opposite to the first magnetic field generating component 2442), and a required gap is reserved between the second magnetic field generating component 2462 and the free end 2324 of the vibration plate 232.

[0034] 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, and the first coil 2424 is separated from the fixed end 2322 of the vibration plate 232 by a predetermined gap, so that the AC magnetic field generated when the first coil 2424 is energized 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.

[0035] 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 (or DC magnetic field) generated by the magnetic field generating parts 2442 and 2462, the vibration plate 232 vibrates back and forth in the vertical direction, thereby driving the sound-generating membrane 236 to agitate the air to make sound.

[0036] In summary, Figure 1 Compared to the receiver shown, Figure 2 The receiver shown does not use the drive rod 130 and the reed 140. Figure 2The vibration plate 232 is made of a magnetic conductive material, and its fixed end 2322 is not connected to the coil assembly 242, but a small gap (i.e., a predetermined gap 250) is retained. When the coil 2424 is energized, the AC magnetic field generated by the vibration plate 232 and the fixed magnetic field generated by the magnetic field generating parts 2442 and 2462 acts to generate a driving force to push the vibration plate 232 to vibrate and produce sound. In other words, the vibration plate 232 made of a 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.

[0037] Please refer to Figure 3 As shown, it is Figure 2 The structural diagram of the diaphragm mechanism in one embodiment; please refer to Figure 4 As shown, it is Figure 3 The exploded diagram of the diaphragm mechanism is shown in FIG. Figure 3 and Figure 4 As shown, the diaphragm mechanism 230 includes a diaphragm 232 , a fixing frame 234 , a sound-generating membrane 236 and a hinge 237 .

[0038] The fixing frame 234 is connected to 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 fixing frame 234. The fixing frame 234 is made of non-magnetic conductive material, which can be stainless steel, aluminum or other non-magnetic conductive metal or non-metallic material. Since the fixing frame 234 is made of non-magnetic conductive material, stainless steel can be selected and spring tempering treatment can be performed to further improve its elasticity and enhance impact resistance.

[0039] The fixed end 2322 of the vibration plate 232 is hinged to the inner side of the fixing frame 234 via a hinge 237, and the free end 2324 thereof is suspended in the fixing frame 234. Figure 3 and Figure 4 In the specific embodiment shown, the hinge 237 is arranged on the inner side of the fixed frame 234, and the fixed end 2322 of the vibration plate 232 is provided with a notch matching the hinge 237, which can play a self-positioning role when the vibration plate 232 and the fixed frame 234 are assembled; a first 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; a second gap 239 is formed between the outer surface of the fixed end 2322 of the vibration plate 232 and the inner surface of the fixed frame 234.

[0040] The sound producing membrane 236 is pre-attached to a surface of the fixing frame 234 facing the first cavity 222 independently of the housing 210 , and seals at least a first gap 238 formed between the free end 2324 of the vibration plate 232 and the fixing frame 234 .

[0041] exist Figure 3 and Figure 4 In the specific embodiment shown, the sound film 236 covers the second gap 239 formed between the fixed end 2322 of the vibration plate 232 and the fixed frame 234; the sound film 236 is provided with a protrusion 2362 facing the second cavity 224 at a position corresponding to the first gap 238. Due to the provision of the protrusion 2362, when the vibration plate 232 drives the sound film 236 to vibrate, the sound film 236 can more easily vibrate with the vibration plate. In an optional embodiment, the sound film 236 can also be pre-attached to a side surface of the fixed frame 234 facing the second cavity 224, and the protrusion 2362 faces the first cavity 222.

[0042] In a preferred embodiment, the hinge 238 includes a torsion beam and a cantilever beam (not marked), and the width, length and / or thickness of the hinge can be adjusted through the torsion beam and the cantilever beam, thereby adjusting the vibration parameters and obtaining different output frequency response curves.

[0043] Please refer to Figure 5 As shown, it is Figure 2 An exploded view of the receiver is shown. Figure 1 compared to, Figure 2 and Figure 5 The components inside the receiver shown are clearly layered, and its stacked design makes the assembly process simple and very suitable for automated production.

[0044] 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:

[0045] (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;

[0046] (2) It reduces the number of connections between moving parts (e.g., drive rods and reeds), resulting in higher reliability;

[0047] (3) The new design has better impact resistance and can improve product reliability;

[0048] (4) Fewer components and simpler assembly processes lead to higher production efficiency;

[0049] (5) Fewer components and simpler assembly processes help reduce costs.

[0050] 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.

[0051] 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 connected 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, and a predetermined gap is arranged between the coil assembly and 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 separated from the fixed end of the vibration plate by the predetermined gap.

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 connected to the inner side of the fixing frame, and the free end of the vibration plate is suspended from the fixing frame, and a first gap is formed between the free end of the vibration plate and the fixing frame; The sound producing membrane is attached to a side surface of the fixing frame and seals at least the first gap.

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

6. The receiver according to claim 4, 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 4, characterized in that: The diaphragm mechanism further comprises a hinge, The fixed end of the vibration plate is hinged to the inner side of the fixing frame through the hinge. A second gap is formed between the fixed end of the vibration plate and the fixed frame, and the sound producing membrane covers the second gap.

8. The receiver according to claim 7, characterized in that: The hinge is arranged on the inner side of the fixing frame. The fixed end of the vibration plate is provided with a notch matching the hinge.

9. The receiver according to claim 7, characterized in that: The hinge includes a torsion beam and a cantilever beam, The width, length and / or thickness of the hinges can be adjusted via torsion beams and cantilever beams to tune vibration parameters.

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