Vibration mechanism, receiver and receiver assembly method

Abstract

The present invention discloses a vibration mechanism, a receiver and a receiver assembly method. The receiver of the present invention comprises: a shell having an inner cavity formed therein; a sound film mechanism; a vibration mechanism, the vibration mechanism comprising an electromagnet unit and a permanent magnet; the electromagnet and the vibration plate are provided with matching fixing units, and the electromagnet unit and the vibration plate are fixedly connected through the fixing units. In the receiver of the present invention, the connection structure between the armature and the vibration plate is stable, avoiding the problem of sound distortion.

Description

Technical Field

[0001] The invention relates to the field of electromagnetic receivers, and in particular to a vibration mechanism, a receiver and a receiver assembly method. Background Art

[0002] Electromagnetic receivers are widely used in portable electronic devices such as mobile phones, laptops, hearing aids, etc. With the rapid development of these portable electronic devices, people have higher and higher requirements for their functionality, and the miniature receiver devices used in them are also developing rapidly accordingly.

[0003] At present, in the prior art, a moving-iron receiver usually uses a conduction rod to connect the armature and the vibration plate, and transmits the vibration of the armature to the vibration plate through the conduction rod, thereby driving the sound membrane on the vibration plate to vibrate and produce sound. During the vibration conduction process of the receiver of the above mechanism, it is necessary to ensure the connection strength between the conduction rod and the armature and the vibration plate to ensure the stability of the vibration during the conduction process. Low connection strength is likely to cause problems such as pronunciation distortion and short service life. In the prior art, it is difficult to ensure the connection strength of the two ends of the conduction rod for the mechanism connecting the conduction rod to the armature and the vibration plate. In addition, due to the delicate structure of the conduction rod, it brings certain difficulties to the assembly method.

[0004] Therefore, improving the vibration mechanism between the armature and the vibration plate can effectively improve the performance and service life of the moving iron receiver and reduce the difficulty of the assembly method. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is the problem of low reliability and great assembly difficulty of the vibration mechanism between the armature and the vibration plate of the moving iron receiver.

[0006] To this end, the present invention provides a receiver, which includes: a shell having an inner cavity formed therein; a sound membrane mechanism, which includes a vibration plate and a sound membrane covering the surface of the vibration plate; one end of the vibration plate is fixed and the other end can vibrate freely; a vibration mechanism, which includes an electromagnet unit and a permanent magnet; the electromagnet and the vibration plate are provided with matching fixing units, and the electromagnet unit and the vibration plate are fixedly connected via the fixing unit.

[0007] Furthermore, the electromagnet unit includes an armature and a coil at least sleeved on a portion of the armature; the armature and the vibration plate are provided with matching fixing units.

[0008] Furthermore, the armature is a U-shaped armature, and the U-shaped armature includes a first arm unit and a second arm unit which are arranged in parallel, a coil is sleeved on the second arm unit, and the first arm unit and the vibration plate are provided with the matching fixing unit.

[0009] Furthermore, the fixing unit is a protrusion and a groove with matching shapes and sizes.

[0010] Further, a spherical protrusion is provided on the first arm unit, and a corresponding spherical groove is provided on the vibration plate.

[0011] Furthermore, fixed connection holes are correspondingly provided at the top ends of the spherical protrusion and the spherical groove.

[0012] Further, a sheet-like protrusion is provided on the first arm unit, a corresponding fixing hole is provided on the vibration plate, and the sheet-like protrusion is inserted into the fixing hole.

[0013] Furthermore, the vibration plate is provided with a groove which is sunken in a direction close to the armature, and the fixing hole is provided at the bottom of the groove.

[0014] Further, the sheet-like protrusion is arranged at an end of the first arm unit.

[0015] Furthermore, the fixing unit is arranged away from the fixing end of the vibration plate.

[0016] Furthermore, the sound membrane mechanism also includes a fixed frame, the vibration plate is arranged in the fixed frame, the fixed frame is connected to the shell, one end of the vibration plate is fixedly connected to the fixed frame, and the sound membrane covers one side surface of the vibration plate.

[0017] Furthermore, the sound membrane mechanism divides the inner cavity into a first chamber and a second chamber, the sound membrane is located in the second chamber, and the electromagnet unit is arranged in the first chamber.

[0018] Further, the two permanent magnets are respectively and correspondingly arranged in the first chamber and the second chamber on both sides of the end of the first arm unit, and the magnetic poles of the permanent magnets are respectively opposite to the ends of the first arm unit.

[0019] Further, the fixing unit is provided in an area other than an area corresponding to the permanent magnet on the vibration plate and the first arm unit.

[0020] Furthermore, a through hole is provided on the vibration plate at a position corresponding to the permanent magnet.

[0021] Furthermore, the shell includes a first shell forming a first cavity and a second shell forming a second cavity, the first shell and the second shell can be snap-connected, the sound membrane mechanism is arranged between the first shell and the second shell, or the sound membrane mechanism is stuck in the first shell.

[0022] A method for assembling any of the above-mentioned receivers comprises the following steps:

[0023] S1: installing a first permanent magnet into a first housing to form a first housing module;

[0024] S2: installing the second permanent magnet into the second housing to form a second housing module;

[0025] S3: Assembling the electromagnet unit and the sound membrane mechanism, and fixing and connecting the electromagnet unit and the sound membrane mechanism to form a sound membrane vibration module;

[0026] S4: Assemble the first shell module, the sound membrane vibration module and the second shell module in sequence from bottom to top.

[0027] Furthermore, the step of assembling the vibration mechanism in step S3 includes: sleeve the coil onto an end arm of the armature which is not provided with a fixing unit.

[0028] Furthermore, in the step S3, the step S31 of assembling the electromagnet unit is as follows: sleeve the coil onto the second arm unit of the U-shaped armature of the armature to form the electromagnet unit, and then fix the first arm unit of the armature to the vibration plate of the diaphragm mechanism;

[0029] After step S31, the step S32 of assembling the sound film mechanism is also included:

[0030] The sound film is pasted on the surface of the fixing frame on the other side of the electromagnet, and the edge of the sound film is fixed to the fixing frame.

[0031] Furthermore, in step S31, the first arm unit and the vibration plate are fixedly connected by welding or adhesive.

[0032] Furthermore, the method for fixing the armature and the vibration plate in step S31 is: sleeve the spherical groove on the vibration plate onto the spherical protrusion on the armature, and weld and fix the armature and the vibration plate through the fixed connection holes on the spherical groove and the spherical protrusion.

[0033] Furthermore, the method for fixing the armature and the vibration plate in step S31 is: the spherical groove on the vibration plate is sleeved onto the spherical protrusion on the armature, and the armature and the vibration plate are fixedly connected by injecting adhesive into the fixed connection holes on the spherical groove and the spherical protrusion and the mating surfaces of the spherical groove and the spherical protrusion.

[0034] Furthermore, the method for fixing the armature and the vibration plate in step S31 is: inserting the sheet-shaped protrusion on the armature into the fixing hole on the vibration plate, and injecting adhesive into the groove provided with the fixing hole to fix the armature and the vibration plate.

[0035] Further, the injected adhesive does not protrude from the opening of the groove.

[0036] Furthermore, the method for fixing the armature and the vibration plate in step S31 is: inserting the sheet-shaped protrusion on the armature into the fixing hole on the vibration plate and welding it to the groove.

[0037] Further, the welding point does not protrude from the opening of the groove.

[0038] The technical solution provided by the present invention has the following advantages:

[0039] 1. In the receiver provided by the present invention, the armature and the vibration plate are fixedly connected by a matching fixing unit. Compared with simple adhesive bonding or welding fixation, it has higher connection strength, ensures the reliability of the connection between the armature and the vibration plate, and avoids the loss of vibration during the conduction process.

[0040] 2. In the receiver provided by the present invention, the spherical protrusion on the surface of the armature and the spherical groove on the surface of the vibration plate cooperate with each other, and then the two are welded and fixed through the fixing hole at the top of the spherical groove, so that they have higher connection strength, ensure the reliability of the connection between the armature and the vibration iron, and avoid the loss of vibration during the conduction process.

[0041] 3. The receiver provided by the present invention, after the sheet-like protrusion on the surface of the armature and the fixing hole on the surface of the vibration plate cooperate with each other, is fixed by welding or bonding with an adhesive, so that the fixed connection between the armature and the vibration plate has a higher strength, ensuring the reliability of the connection between the armature and the vibration iron, and avoiding the loss of vibration during the conduction process. At the same time, the fixing hole is set at the bottom of the groove on the vibration plate, so that after the sheet-like protrusion is connected to the fixing hole, the part of the sheet-like protrusion inserted into the fixing hole and the welding point or adhesive do not protrude from the upper surface of the vibration plate, ensuring the normal installation of the sound film, and avoiding the collision between the fixed structure and the sound film.

[0042] 4. In the receiver provided by the present invention, the fixing unit is arranged away from the fixing end of the vibration plate. The free end of the vibration plate generates a larger torque under the same external force, so that the vibration plate generates a larger amplitude, thereby improving the sensitivity of the receiver.

[0043] 5. In the receiver provided by the present invention, the first shell and the second shell can be snapped together to form an inner cavity. After the components inside the first shell and the second shell are assembled respectively, the first shell and the second shell are snapped together into a whole, so as to realize modular installation of the receiver.

[0044] 6. In the receiver provided by the present invention, after the coil is connected to the alternating current, the end of the first arm unit is a magnetic pole of the alternating magnetic field, and the alternating magnetic field intensity around it is the highest. Two permanent magnets are arranged on both sides of the end, and the magnetic poles of the permanent magnets are located opposite to the end, so that the fixed magnetic field of the permanent magnet and the alternating magnetic field interact with each other most strongly, and the force exerted by the two permanent magnets on the first arm unit is also the strongest, so that the amplitude generated by the first arm unit is the largest, thereby improving the sensitivity of the receiver.

[0045] 7. In the receiver provided by the present invention, the fixing unit is arranged in the area outside the area corresponding to the permanent magnet on the vibration plate and the armature, so that the area opposite to the vibration plate and the permanent magnet remains flat, which can avoid the magnetic field loss when the fixed magnetic field of the permanent magnet passes through the vibration plate; a through hole is provided at the position on the vibration plate corresponding to the permanent magnet, so that the fixed magnetic field of the permanent magnet can be directly transmitted through the through hole, thereby avoiding the magnetic field loss when the fixed magnetic field passes through the vibration plate.

[0046] 8. The assembly method of the receiver provided by the present invention comprises the following steps: the electromagnet unit and the first permanent magnet and the first shell form a first shell module; the second permanent magnet and the second shell form a second shell module; the sound membrane mechanism serves as the sound membrane module; the three modules are assembled separately, and finally the three modules are assembled to complete the assembly process of the receiver, thereby greatly improving the assembly efficiency of the receiver and reducing the production cost of the receiver. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 It is a structural schematic diagram of a fixing unit of an electromagnet and a vibration plate;

[0049] Figure 2 A schematic diagram of the structure of another fixing unit of the electromagnet and the vibration plate;

[0050] Figure 3 is a schematic diagram of the structure of a receiver;

[0051] Figure 4 It is a structural schematic diagram of a vibration plate and a fixed frame;

[0052] Description of reference numerals:

[0053] 1-shell; 11-first shell; 12-second shell; 13-first chamber; 14-second chamber;

[0054] 2-sound film mechanism; 21-fixing frame; 22-vibration plate; 221-spherical groove; 222-fixing hole; 223-through hole; 23-sound film;

[0055] 3-electromagnet unit; 31-armature; 311-first arm unit; 3111-spherical protrusion; 3112-flaky protrusion; 312-second arm unit; 32-coil; 33-permanent magnet. DETAILED DESCRIPTION

[0056] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0057] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0060] Example 1

[0061] This embodiment provides a receiver, such as Figure 3As shown, it includes a shell 1, a sound membrane mechanism 2 and a vibration mechanism 3. The shell 1 has a first shell 11 formed with a first cavity 13 and a second shell 12 formed with a second cavity 14, and the first shell 11 and the second shell 12 can be buckled to form an inner cavity, wherein the first shell 11 is provided with a tuning hole 111, and the second shell 12 is provided with a sound outlet hole 121.

[0062] The diaphragm mechanism 2 divides the inner cavity into a first chamber 13 and a second chamber 14, wherein the diaphragm mechanism 2 can be arranged between the first shell 11 and the second shell 12, or can be clamped in the first shell 11. The diaphragm mechanism 2 in this embodiment includes a fixed frame 21, a vibration plate 22 and a diaphragm 23. The fixed frame 21 is connected to the shell 1, and the fixed frame 21 is fixedly installed between the first shell 11 and the second shell 12. The vibration plate 22 is arranged in the fixed frame 21, one end of the vibration plate 22 is fixedly connected to the fixed frame 21, and the other end of the vibration plate 22 can vibrate freely. The diaphragm 23 is arranged in the second chamber 14 and covers the surface of the vibration plate 22. The edge of the diaphragm 23 is fixedly connected to the fixed frame 21, and the middle of the diaphragm 23 is fixedly connected to the vibration plate 22.

[0063] like Figure 3 As shown, the vibration mechanism 3 includes an electromagnet unit and two permanent magnets 33. The electromagnet unit is arranged in the first chamber 13. The electromagnet unit of this embodiment includes a U-shaped armature 31. The U-shaped armature 31 includes a first arm unit 311 and a second arm unit 312 arranged in parallel, wherein the second arm unit 312 is sleeved with a coil 32. The first arm unit 311 is longer than the second arm unit 312. Figure 3 As shown, two permanent magnets 33 are respectively arranged in the first cavity 13 and the second cavity 14 on both sides of the end of the first arm unit 311 , and the magnetic poles of the permanent magnets 33 are respectively arranged opposite to the ends of the first arm unit 311 .

[0064] To fix the armature and the vibration plate, Figure 1 As shown, in this embodiment, the first arm unit 311 of the armature 31 and the vibration plate 22 are correspondingly provided with fixing units, such as Figure 1 As shown, in this embodiment, a spherical protrusion 3111 is provided on the surface of the first arm unit 311, and a spherical groove 221 matching the spherical protrusion 3111 is correspondingly provided on the vibration plate 22. Fixed connection holes for welding and fixing are correspondingly provided at the top of the spherical protrusion 3111 and the top of the spherical groove 221. The spherical protrusion 3111 on the surface of the first arm unit 311 is connected with the spherical groove 221 on the vibration plate 22, and the two are fixed by welding, which ensures the connection strength between the first arm unit 311 and the vibration plate 22, and improves the connection reliability.

[0065] The fixing unit in this embodiment is arranged in an area outside the area corresponding to the permanent magnet 33 on the vibration plate 22 and the first arm unit 311, thereby preventing the magnetic field from being lost through the fixing connection unit. Figure 4 As shown, further, a through hole 223 is provided on the vibration plate 22 at a position corresponding to the permanent magnet 33 to reduce energy loss when the magnetic field passes through the vibration plate 22 .

[0066] As an alternative implementation, a spherical groove may be provided on the first arm unit 311 , and a corresponding spherical protrusion may be provided on the vibration plate 22 .

[0067] As an alternative embodiment, the fixing unit may also be arranged not far from the fixing end of the vibration plate 22, as long as the interaction force between the alternating magnetic field generated by the electromagnet and the fixed magnetic field of the permanent magnet is large enough to make the first arm unit 311 vibrate with a relatively large amplitude.

[0068] As an alternative embodiment, the tops of the spherical protrusions 3111 and the spherical recesses 221 may not be correspondingly provided with fixed connection holes for welding, as long as the two can be fixedly connected by welding or bonding.

[0069] As an alternative implementation, the protrusion of the fixing unit may also be a square protrusion, and the corresponding groove may also be a square groove.

[0070] As an alternative implementation, the vibration plate may not be provided with through holes, or the provided through holes may not correspond to the permanent magnets, as long as the area on the vibration plate opposite to the permanent magnets has sufficiently good magnetic conductivity.

[0071] As an alternative implementation, the fixing unit may also be arranged on the vibrating plate and the armature in regions corresponding to the permanent magnets, as long as the fixing unit has sufficiently good magnetic conductivity.

[0072] As an alternative embodiment, the first arm unit 311 may also be no longer than the second arm unit 312, as long as two permanent magnets can be arranged on both sides of the first arm unit 311, the first arm unit 311 can vibrate under the combined action of the fixed magnetic field of the permanent magnet 33 and the alternating magnetic field of the coil 32.

[0073] As an alternative implementation, the vibration plate may also be fixedly connected to the fixing frame at multiple ends, as long as the vibration plate has sufficient deformation margin and can be forced to vibrate under the vibration of the electromagnet.

[0074] The assembly method of the receiver of this embodiment includes the following steps:

[0075] S1: Install the first permanent magnet 33 into the first housing 11 to form a first housing module;

[0076] S2: Install the second permanent magnet 33 into the second housing 12 to form a second housing module;

[0077] S31: The coil 32 is mounted on the second arm unit 312 of the U-shaped armature of the armature 31 to form an electromagnet unit, and then the spherical protrusion 3111 on the first arm unit 311 of the armature 31 is inserted into the spherical groove 221 on the vibration plate 22, and the two are welded and fixed through the fixed connection holes at the top of the spherical protrusion 3111 and the spherical groove 221.

[0078] S32: attaching the sound membrane 23 to the surface of the fixing frame 21 on one side of the second chamber 14, fixing the edge of the sound membrane 23 to the fixing frame 21, and fixing the middle of the sound membrane 23 to the vibration plate 22 to form a sound membrane vibration module;

[0079] S4: Assemble the first housing module, the sound membrane vibration module and the second housing module in sequence from bottom to top to complete the installation of the receiver.

[0080] As an alternative embodiment, in step S31, the armature and the vibration plate can also be fixedly connected by bonding with an adhesive. Specifically, the spherical protrusion 3111 on the first arm unit 311 of the armature 31 is inserted into the spherical groove 221 on the vibration plate 22, and the two are fixedly connected by injecting adhesive into the fixed connection holes at the top of the spherical protrusion 3111 and the spherical groove 221, and the mating surfaces of the spherical protrusion 3111 and the spherical groove 221.

[0081] The sound generation process of the receiver in this embodiment is as follows:

[0082] In the initial state, the coil 32 is not energized. Since the armature 31 is made of magnetic conductive material, the fixed magnetic field of the permanent magnet 33 cancels out the forces acting on the first arm unit 311, so that the first arm unit 311 of the armature 31 is in a balanced state. When the coil 32 is connected to an alternating current, the electromagnet generates an alternating magnetic field, so that the end of the first arm unit 311 has a changing magnetic pole, and the direction of the magnetic force generated by the permanent magnet 33 on the end of the first arm unit 311 keeps changing, so that the first arm unit 311 vibrates under this force. The first arm unit 311 transmits the vibration to the vibration plate 22, so that the vibration plate 22 is forced to vibrate, thereby causing the sound membrane 23 to stir the air to make a sound.

[0083] Example 2

[0084] A receiver is provided in the second embodiment. The main difference between the second embodiment and the first embodiment is that the fixing unit is arranged differently. The rest of the structure of the receiver in the second embodiment is the same as that in the first embodiment.

[0085] like Figure 2As shown, the fixing unit in this embodiment is a protrusion and a groove with matching shapes and sizes. A sheet-like protrusion 3112 is provided at the end of the first arm unit 311, and a groove is provided on the vibration plate 22 on the opposite side of the sound membrane 23, which is concave toward the armature. A fixing hole 222 is provided at the bottom of the groove, and the sheet-like protrusion 3112 is inserted into the fixing hole 222. The two are fixedly connected by injecting an adhesive into the groove or welding the sheet-like protrusion in the groove, thereby ensuring the connection strength between the two and improving the connection reliability.

[0086] As an alternative embodiment, the surface of the first arm unit 311 may also be provided with a columnar protrusion, and the vibration plate 22 may be provided with a corresponding fixing hole 222. As long as the two are fixedly connected after cooperating with each other and have sufficient connection strength, the reliability of the connection can be ensured.

[0087] As an alternative embodiment, the sheet-like protrusion 3112 can also be set at a position other than the end of the first arm unit 311. As long as it cooperates with the fixing hole 222 and the fixed connection has sufficient strength to ensure the reliability of the connection, under the interaction of the alternating magnetic field and the fixed magnetic field of the permanent magnet 33, the first arm unit 311 can effectively transmit the vibration to the vibration plate 22 when it vibrates.

[0088] The assembly method of the receiver of this embodiment includes the following steps:

[0089] S1: Install the first permanent magnet 33 into the first housing 11 to form a first housing module;

[0090] S2: Install the second permanent magnet 33 into the second housing 12 to form a second housing module;

[0091] S31: The coil 32 is mounted on the second arm unit 312 of the U-shaped armature of the armature 31 to form an electromagnet unit, and then the sheet-like protrusion 3112 on the first arm unit 311 of the armature 31 is inserted into the fixing hole 222 on the vibration plate 22, and the adhesive is injected into the groove provided with the fixing hole 222 to fix the armature 31 and the vibration plate 22, and the injected adhesive does not protrude from the opening of the groove.

[0092] S32: attaching the sound membrane 23 to the surface of the fixing frame 21 on one side of the second chamber 14, fixing the edge of the sound membrane 23 to the fixing frame 21, and fixing the middle of the sound membrane 23 to the vibration plate 22 to form a sound membrane vibration module;

[0093] S4: Assemble the first housing module, the sound membrane vibration module and the second housing module in sequence from bottom to top to complete the installation of the receiver.

[0094] As an alternative embodiment, in step S31, the armature and the vibration plate can also be fixedly connected by welding. Specifically, the sheet-like protrusion 3112 on the first arm unit 311 is inserted into the fixing hole 222 on the vibration plate 22 and the sheet-like protrusion 3112 is welded and fixed to the fixing hole 222. At this time, the height of the welding point does not protrude from the opening of the groove.

[0095] The receiver provided by the present invention has an armature and a vibration plate fixedly connected by a matching fixing unit, which has a higher connection strength than simple adhesive bonding or welding, thereby ensuring the reliability of the connection between the armature and the vibration plate and avoiding the loss of vibration during the conduction process.

[0096] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A receiver, comprising: a housing, wherein an inner cavity is formed in the housing; A sound film mechanism, the sound film mechanism comprising a vibration plate and a sound film covering the surface of the vibration plate; one end of the vibration plate is fixed, and the other end can vibrate freely; A vibration mechanism, wherein the vibration mechanism comprises an electromagnet unit and a permanent magnet; Features: The electromagnet and the vibration plate are provided with matching fixing units, and the electromagnet unit and the vibration plate are fixedly connected through the fixing units; The electromagnet unit comprises an armature and a coil at least sleeved on a portion of the armature; the armature and the vibration plate are provided with a matching fixing unit; The armature is a U-shaped armature, and the U-shaped armature includes a first arm unit and a second arm unit arranged in parallel, a coil is sleeved on the second arm unit, and the first arm unit and the vibration plate are provided with the matching fixing unit; The two permanent magnets are respectively disposed in the first chamber and the second chamber on both sides of the end of the first arm unit, and the magnetic poles of the permanent magnets are respectively opposite to the ends of the first arm unit; The fixing unit is disposed in an area other than an area corresponding to the permanent magnet on the vibration plate and the first arm unit; A through hole is provided on the vibration plate at a position corresponding to the permanent magnet.

2. The receiver according to claim 1, characterized in that: The fixing unit is a protrusion and a groove with matching shapes and sizes.

3. The receiver according to claim 2, characterized in that: The first arm unit is provided with a spherical protrusion, and the vibration plate is provided with a corresponding spherical groove.

4. The receiver according to claim 3, characterized in that: Fixed connection holes are correspondingly arranged at the top ends of the spherical protrusion and the spherical groove.

5. The receiver according to claim 2, characterized in that: The first arm unit is provided with a sheet-like protrusion, and the vibration plate is provided with a corresponding fixing hole, and the sheet-like protrusion is inserted into the fixing hole.

6. The receiver according to claim 5, characterized in that: The vibration plate is provided with a groove which is sunken toward the armature, and the fixing hole is provided at the bottom of the groove.

7. The receiver according to claim 5, characterized in that: The plate-like protrusion is provided at an end portion of the first arm unit.

8. The receiver according to claim 1, characterized in that: The fixing unit is arranged away from the fixing end of the vibration plate.

9. The receiver according to claim 1, characterized in that: The sound membrane mechanism also includes a fixed frame, the vibration plate is arranged in the fixed frame, the fixed frame is connected to the shell, one end of the vibration plate is fixedly connected to the fixed frame, and the sound membrane covers one side surface of the vibration plate.

10. The receiver according to claim 9, characterized in that The sound membrane mechanism divides the inner cavity into a first chamber and a second chamber, the sound membrane is located in the second chamber, and the electromagnet unit is arranged in the first chamber.

11. The receiver according to claim 1, characterized in that: The shell includes a first shell forming a first cavity and a second shell forming a second cavity. The first shell and the second shell can be snap-connected. The sound membrane mechanism is arranged between the first shell and the second shell, or the sound membrane mechanism is stuck in the first shell.

12. A method for assembling a receiver as claimed in any one of claims 1 to 11, characterized in that: The steps include: S1: installing a first permanent magnet into a first housing to form a first housing module; S2: installing the second permanent magnet into the second housing to form a second housing module; S3: Assembling the electromagnet unit and the sound membrane mechanism, and fixing and connecting the electromagnet unit and the sound membrane mechanism to form a sound membrane vibration module; S4: Assemble the first shell module, the sound membrane vibration module and the second shell module in sequence from bottom to top.

13. The assembly method according to claim 12, characterized in that: The step of assembling the vibration mechanism in step S3 includes: sleeve the coil onto an end arm of the armature which is not provided with a fixing unit.

14. The assembly method according to claim 12 or 13, characterized in that: In step S3, the electromagnet unit is assembled in step S31: the coil is sleeved onto the second arm unit of the U-shaped armature of the armature to form the electromagnet unit, and the first arm unit of the armature is fixedly connected to the vibration plate of the diaphragm mechanism; After step S31, the step S32 of assembling the sound film mechanism is also included: The sound film is pasted on the surface of the fixing frame on the other side of the electromagnet, and the edge of the sound film is fixed to the fixing frame, and the middle part of the sound film is fixedly connected to the vibration plate.

15. The assembly method according to claim 14, characterized in that: In step S31 , the first arm unit and the vibration plate are fixedly connected by welding or adhesive.

16. The assembly method according to claim 15, characterized in that: The method for fixing the armature and the vibration plate in step S31 is: sleeve the spherical groove on the vibration plate onto the spherical protrusion on the armature, and fix the armature and the vibration plate by welding through the fixing connection holes on the spherical groove and the spherical protrusion.

17. The assembly method according to claim 16, characterized in that: The method for fixing the armature and the vibration plate in step S31 is: the spherical groove on the vibration plate is sleeved onto the spherical protrusion on the armature, and the armature and the vibration plate are fixedly connected by injecting adhesive into the fixed connection holes on the spherical groove and the spherical protrusion and the matching surfaces of the spherical groove and the spherical protrusion.

18. The assembly method according to claim 17, characterized in that: The method for fixing the armature and the vibration plate in step S31 is: inserting the sheet-shaped protrusion on the armature into the fixing hole on the vibration plate, and injecting adhesive into the groove provided with the fixing hole to fix the armature and the vibration plate.

19. The assembly method according to claim 18, characterized in that: The injected adhesive does not protrude beyond the opening of the groove.

20. The assembly method according to claim 18, characterized in that: The method for fixing the armature and the vibration plate in step S31 is: inserting the sheet-shaped protrusion on the armature into the fixing hole on the vibration plate and welding it to the groove.

21. The assembly method according to claim 20, characterized in that: The welding point does not protrude beyond the opening of the groove.

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