A receiver and its assembly process

Abstract

The present invention discloses a receiver and an assembly process thereof. The receiver comprises a housing, a diaphragm mechanism and an electromagnetic drive mechanism arranged in the housing. The diaphragm mechanism and the electromagnetic drive device are arranged in the inner cavity of the housing. The diaphragm mechanism has a vibration plate with one end suspended in the air. The electromagnetic drive mechanism comprises a coil and a magnetic field component for generating a fixed magnetic field. The receiver of this structure has the housing divided into two shells, and the fixing frame of the diaphragm mechanism is directly installed on the housing. The structure is simple and the installation process is simplified. The assembly process is: a first permanent magnet is fixed on the inner wall surface of the first shell to form a first module; a second permanent magnet and a coil are fixed on the inner wall surface of the second shell to form a second module; a soft magnet is fixed on the vibration plate to form a third module. Finally, the three modules are assembled together to complete the assembly of the receiver, realize modular installation, and improve the assembly efficiency of the receiver.

Description

Technical Field

[0001] The present invention relates to the technical field of receivers, and in particular to a receiver and an assembly process thereof. Background Art

[0002] A receiver 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 headphones to achieve audio output.

[0003] With the continuous development of mobile devices, the structure of the receiver is constantly updated. For example, Japanese patent document JP10301573A discloses a receiver, including a cover, a bottom plate, a magnet, a coil, an iron core, a diaphragm and an annular isolation cylinder. The cover has a bottom opening, and the bottom plate is arranged on the bottom opening of the cover to enclose a closed installation cavity; the annular isolation cylinder is fixed on the top surface of the bottom plate, and the diaphragm is horizontally installed on the top step surface of the annular isolation cylinder; the magnet is fixed on the bottom plate, and the coil is sleeved outside the magnet and located inside the annular isolation cylinder; a soft magnet is also arranged on the top surface of the diaphragm. For a receiver of this structure, when the coil is not energized, the fixed magnetic field of the magnet has an attraction force that attracts the soft magnet downward; when the coil is energized, the electromagnetic field generated by the energization of the coil increases or weakens the force of the fixed magnetic field, so that the diaphragm vibrates in the vertical direction to realize the reciprocating vibration of the diaphragm, thereby arousing the air to vibrate and make sound.

[0004] The assembly process of the receiver of this structure is as follows: the magnet is pre-fixed on the base plate, and then the coil is sleeved outside the magnet and fixed to the base plate; the annular isolation cylinder is sleeved outside the coil and fixed to the base plate; then the diaphragm is fixed on the step surface on the top of the annular isolation cylinder; finally, the cover is sleeved outside the annular isolation cylinder so that the base plate is embedded in the cover to complete the installation process of the receiver.

[0005] However, this assembly process requires that the magnet and coil must be installed on the bottom plate before the annular isolation cylinder and the diaphragm can be fixed on the bottom plate, and the cover is sleeved outside the annular isolation cylinder. When the bottom plate is embedded in the cover, it is difficult to ensure the fixation between the cover and the bottom plate, which easily causes gaps and installation blind spots between the bottom plate, the outer wall of the isolation cylinder and the cover, resulting in low yield rate of the receiver and complex assembly process. At the same time, the above-mentioned receiver must use an annular isolation cylinder to fix the diaphragm above the permanent magnet and the coil, making the structure of the entire receiver complicated. Summary of the invention

[0006] Therefore, the technical problem to be solved by the present invention is to overcome the problems of complex structure and complex assembly process of the receiver in the prior art.

[0007] To this end, the present invention provides a receiver, comprising

[0008] The housing comprises a first shell body formed by a first bottom surface and a side wall, and a second shell body formed by a second bottom surface and a side wall; the second shell body is detachably buckled with the first shell body to enclose an inner cavity;

[0009] A diaphragm mechanism is arranged on the housing to divide the inner cavity of the housing into a first cavity close to the first bottom surface and a second cavity close to the second bottom surface; the diaphragm mechanism has a vibration plate with one end suspended in the inner cavity;

[0010] The electromagnetic drive mechanism is arranged in the inner cavity and has at least one coil and a magnetic field component. The fixed magnetic field generated by the magnetic field component cooperates with the electromagnetic field generated by the coil to drive the vibration plate to reciprocate in a direction perpendicular to the direction of the vibration plate.

[0011] Preferably, in the above-mentioned receiver, the electromagnetic drive mechanism further comprises a soft magnetic body fixed on the surface of the vibration plate on the side facing the second cavity, the coil is sleeved on the soft magnetic body and is located in the second cavity, and a gap is reserved between the inner wall surface of the coil and the outer wall surface of the soft magnetic body;

[0012] The magnetic field component drives the soft magnetic body magnetized by the electromagnetic field to drive the vibration plate to perform reciprocating vibration.

[0013] Preferably, in the above-mentioned receiver, the coil is fixed on the surface of the vibration plate on the side facing the second cavity, and a required gap is reserved between the coil and the magnetic field assembly.

[0014] Further preferably, in the above-mentioned receiver, the magnetic field assembly includes a first permanent magnet fixed in the first mounting cavity, and a second permanent magnet fixed in the second cavity and arranged opposite to the first permanent magnet; the polarity of the first permanent magnet and the second permanent magnet facing each other are the same, and the required vibration gap is reserved between them and the vibration plate.

[0015] Further preferably, in the above-mentioned receiver, the magnetic field assembly further comprises a first yoke arranged on the inner wall surface of the first shell, and one end of the first permanent magnet facing away from the vibration plate is fixed on the first yoke; and / or

[0016] A second magnetic yoke is arranged on the inner wall surface of the second shell, and one end of the second permanent magnet facing away from the vibration plate is fixed on the second magnetic yoke.

[0017] Further preferably, when the above-mentioned receiver corresponds to the soft magnetic body, the coil is fixed on the inner wall surface of the shell located in the second cavity.

[0018] Preferably, in the above-mentioned receiver, the diaphragm mechanism further comprises a fixing frame, one end of the vibration plate is fixed on the fixing frame, and the other end is suspended in the fixing frame;

[0019] The fixing frame is fixed at an opening between the first shell and the second shell.

[0020] Preferably, the above-mentioned receiver also includes a sound outlet hole and a tuning hole respectively opened on the wall surface of the shell located in the first cavity and the second cavity, a tuning tube installed on the tuning hole and located in the second cavity, and a sound guide tube fixed on the outer wall surface of the shell and containing the sound outlet hole therein.

[0021] The present invention also provides a receiver assembly process, which is characterized by comprising the following steps:

[0022] S1: pre-fixing the first permanent magnet on the inner wall surface of the first shell;

[0023] The second permanent magnet is fixed on the inner wall surface of the second shell, and the coil is fixed on the inner wall surface of the second shell and is located above the second permanent magnet;

[0024] The soft magnetic body (31) is pre-fixed on the surface of the vibration plate of the vibration membrane mechanism on the side facing away from the sound-generating membrane;

[0025] S2: inserting the soft magnetic body on the diaphragm mechanism into the coil, fixing the fixing frame of the diaphragm mechanism on the inner wall surface of the first shell or the second shell, and then fixing the openings of the first shell and the second shell together; or

[0026] The soft magnetic body in the diaphragm mechanism is extended into the coil, and the fixing frame of the diaphragm mechanism is fixed between the openings of the first shell and the second shell.

[0027] Preferably, the above-mentioned receiver further comprises a first yoke and a second yoke;

[0028] In step S1, the first magnetic yoke is fixed on the inner wall surface of the first shell in advance, and then the first permanent magnet is fixed on the first magnetic yoke;

[0029] The second yoke is fixed on the inner wall surface of the second shell in advance, and then the second permanent magnet is fixed on the second yoke.

[0030] Preferably, the above-mentioned receiver further comprises a tuning tube;

[0031] In step S1, a tuning tube is pre-installed on a tuning hole on a side wall of the second housing;

[0032] After step S2, the method further includes installing a sound guide tube on the outer wall of the shell, so that the sound guide tube includes the sound outlet hole on the first shell and the tuning hole in its inner cavity.

[0033] The technical solution of the present invention has the following advantages:

[0034] 1. The receiver provided by the present invention comprises a housing, a diaphragm mechanism and an electromagnetic drive mechanism. The diaphragm mechanism and the electromagnetic drive device are arranged in the inner cavity of the housing, and the diaphragm mechanism has a vibration plate with one end suspended in the air, an electromagnetic drive mechanism coil and a magnetic field assembly for generating a fixed magnetic field. The fixed magnetic field generated by the magnetic field assembly cooperates with the electromagnetic field generated by the coil to drive the vibration plate to reciprocate in a direction perpendicular to the setting of the vibration plate.

[0035] In a receiver of this structure, the diaphragm mechanism does not need to be indirectly fixed to the housing through an annular isolation tube. Instead, the housing is configured as two shells, and the diaphragm mechanism is directly mounted on the housing, thereby reducing the number of components in the receiver and simplifying the structure and installation process of the receiver.

[0036] 2. The receiver provided by the present invention comprises a magnetic field assembly including a first permanent magnet and a second permanent magnet, which are respectively fixed in the first cavity and the second cavity, and a soft magnet is fixed on the vibration plate and is located between the first permanent magnet and the second permanent magnet. After the coil is energized, the soft magnet is magnetized by the electromagnetic field generated by the coil, and the polarity of the end close to the first permanent magnet is opposite to the polarity of the other end close to the second permanent magnet, while the polarity of the ends of the first permanent magnet and the second permanent magnet that are arranged oppositely and face each other are the same. The fixed magnetic field generated by the first permanent magnet and the second permanent magnet cooperates with the electromagnetic field generated by the coil to drive the vibration plate to reciprocate in a direction perpendicular to the setting of the vibration plate. The first permanent magnet and the second permanent magnet reserve the required vibration gap between the vibration plate and the soft magnet respectively, so that the vibration plate has a larger amplitude and the sensitivity is effectively improved.

[0037] At the same time, the coil is fixed on the inner wall of the second cavity, and the required gap is reserved between the inner hole wall and the peripheral wall of the soft magnetic body. The weight of the coil is borne by the outer shell, which undoubtedly reduces the load on the vibration plate. Under the same electromagnetic driving force, the vibration plate responds faster, the receiver has a shorter transient response time and a higher sensitivity.

[0038] 3. The receiver provided by the present invention has a tuning hole on the wall surface of the shell corresponding to the second cavity, and a tuning tube installed on the tuning hole and located in the second cavity. When the receiver is working, the vibration mechanism vibrates in the inner cavity, driving the air in the first cavity to vibrate and make sound, and the sound is discharged by the sound guide tube through the sound outlet hole. The wall surface of the second cavity has a tuning hole and a tuning tube installed on the tuning hole, and the tuning tube connects the outside with the second cavity; when the vibration plate vibrates, the outside gas enters the second cavity through the tuning tube or is discharged from the second cavity to increase or decrease the pressure of the gas in the second cavity, thereby making it easier for the vibration plate to vibrate upward or downward, thereby adjusting the pronunciation of the receiver and improving the sensitivity of the vibration plate.

[0039] 4. The present invention provides an assembly process for a receiver, comprising the following steps: pre-fixing a first permanent magnet on the inner wall surface of a first shell to form a first module; fixing a second permanent magnet on the inner wall surface of a second shell, and fixing a coil on the inner wall surface of the second shell and located above the second permanent magnet to form a second module; pre-fixing a soft magnet on the surface of a vibration plate of a diaphragm mechanism on the side facing away from the pronunciation membrane to form a third module; then inserting the soft magnet in the diaphragm mechanism into the coil, fixing the fixing frame of the diaphragm mechanism on the inner wall surface of the first shell or the second shell, and fixing the openings of the first shell and the second shell together; or extending the soft magnet in the diaphragm mechanism into the coil, and fixing the fixing frame of the diaphragm mechanism between the openings of the first shell and the second shell.

[0040] In the receiver of this structure, the first permanent magnet and the first shell are the first module, the second permanent magnet, the second shell and the coil are the second module, and the soft magnet and the diaphragm mechanism are the third module. The three modules are assembled separately, and each module has a simple structure and is easy to realize modular production. Finally, the assembly process of the receiver can be completed by assembling the three modules, so that the receiver can be assembled in an automated manner, thereby improving the efficiency of receiver assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] 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.

[0042] Figure 1 A schematic longitudinal cross-sectional view of a receiver provided by the present invention;

[0043] Figure 2 for Figure 1 A schematic top view of the receiver (excluding the first housing, the first magnetic yoke, the first permanent magnet, the sound-generating membrane, the vibration plate, and the sound-conducting tube);

[0044] Figure 3 for Figure 1 A schematic longitudinal section diagram of the diaphragm mechanism of the middle receiver;

[0045] Figure 4 for Figure 1 Top view of the diaphragm mechanism of the receiver (the diaphragm in the diaphragm mechanism is not shown)

[0046] Figure 5 for Figure 1 The left side diagram of the receiver;

[0047] Description of reference numerals:

[0048] 1-housing; 11-first housing; 12-second housing; 13-first cavity; 131-sound outlet hole; 14-second cavity; 141-tuning hole; 142-tuning tube; 15-sound guide tube;

[0049] 2-diaphragm mechanism; 21-fixed frame; 22-vibration plate; 23-sounding membrane; 24-gap;

[0050] 31 - soft magnet; 32 - coil; 331 - first permanent magnet; 332 - second permanent magnet; 333 - first yoke; 334 - second yoke. DETAILED DESCRIPTION

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] Example 1

[0056] This embodiment provides a receiver, such as Figure 1 and Figure 2As shown, it includes a housing 1, a diaphragm mechanism 2 and an electromagnetic driving mechanism.

[0057] like Figure 1 As shown, the housing 1 comprises a first shell 11 consisting of a first bottom surface and a side wall, and a second shell 12 consisting of a second bottom surface and a side wall; the second shell 12 is detachably buckled with the first shell 11 to enclose an inner cavity, for example, by gluing or spot welding, the first shell 11 and the second shell 12 are fixedly connected. Preferably, the first shell 11 and the second shell 12 are both made of a high-permeability magnetic alloy.

[0058] like Figure 1 As shown, the diaphragm mechanism 2 is disposed between the openings of the first shell 11 and the second shell 12, and the inner cavity of the housing 1 is divided into a first cavity 13 close to the first bottom surface and a second cavity 14 close to the second bottom surface. That is, the inner cavity of the first shell 1 serves as the first cavity 13, and the inner cavity of the second shell 12 serves as the second cavity 14.

[0059] like Figure 3 and Figure 4 As shown, the diaphragm mechanism 2 includes a fixed frame 21, a vibration plate 22 and a sound-generating membrane 23. The fixed frame 21 is fixed at the opening between the first shell 11 and the second shell 12, and has a hollow inner cavity. One end of the vibration plate 22 is fixed to the inner side of the fixed frame 21, and the other end is suspended in the fixed frame 21. A gap 24 is reserved between the outer surface of the other end of the vibration plate 22 that is suspended and the inner wall surface of the fixed frame 21. The sound-generating membrane 23 is pre-attached to the entire fixed frame 21 independently of the housing 1, and faces the first cavity 13 side.

[0060] For example, the pronunciation membrane 23 is glued to the fixed frame 21, and the pronunciation membrane 23 is also glued to the surface of the side of the vibration plate 22 facing the first cavity 13, and the reserved gap 24 formed between the suspended end of the vibration plate 22 and the fixed frame 21 is sealed, so that the first cavity 13 is sealed and separated from the second cavity 14. The pronunciation membrane 23 has a protrusion protruding toward the side of the first cavity 13 at the position corresponding to the reserved gap. The setting of the protrusion increases the amount of air agitated by the pronunciation membrane 23 when the vibration plate 22 drives the pronunciation membrane 23 to vibrate, thereby improving the sound performance of the receiver. The material of the pronunciation membrane 23 is preferably a polymer composite film, such as a PVC composite film.

[0061] like Figure 1 As shown, the electromagnetic drive mechanism is arranged in the inner cavity surrounded by the housing 1, and includes a soft magnetic body 31, a coil 32 and a magnetic field assembly. The soft magnetic body 31 is arranged on the surface of the vibration plate 22 facing the second cavity 14, and the soft magnetic body 31 is preferably an iron core. Figure 5As shown, the coil 32 is sleeved on the soft magnetic body 31 and fixed on the inner wall surface of the second shell 12, for example, by gluing. The required gap is reserved between the end surface of the coil 32 close to the vibration plate 22 and the vibration plate 22, and between the inner hole wall surface of the coil 32 and the outer peripheral wall surface of the soft magnetic body 31. The weight of the coil 32 is borne by the shell 1, which undoubtedly reduces the load of the vibration plate 22. Under the same electromagnetic driving force, the vibration plate 22 responds faster, the receiver has a shorter transient response time, and has a higher sensitivity.

[0062] The magnetic field assembly is independent of the diaphragm mechanism 2 and the soft magnetic body 32 and is disposed in the first cavity 13 and the second cavity 14, and is used to drive the magnetized soft magnetic body 31 to drive the vibration plate 22 to reciprocate. Figure 1 As shown, the magnetic field assembly includes a first permanent magnet 331 , a second permanent magnet 332 , a first magnetic yoke 333 , and a second magnetic yoke 334 .

[0063] The first yoke 333 is fixed on the first bottom surface of the first shell 11, and the first permanent magnet 331 is fixed on the first yoke 333 and faces the side of the diaphragm mechanism 2, for example, by adhesive bonding or spot welding; the second yoke 334 is fixed on the second bottom surface of the second shell 12, and the second permanent magnet 332 is fixed on the second yoke 334, for example, by adhesive bonding or spot welding. The first permanent magnet 331 and the second permanent magnet 332 are both directly opposite to the soft magnet 31, and the required gap is reserved between the first permanent magnet 331 and the vibration plate 22, and the required gap is reserved between the second permanent magnet 332 and the soft magnet 31; the polarity of the ends of the first permanent magnet 331 and the second permanent magnet 332 facing each other is the same.

[0064] For example, if one end of the first permanent magnet 331 close to the soft magnet 31 is an N pole, then one end of the second permanent magnet 332 close to the soft magnet 31 is also an N pole. The first permanent magnet 331 and the second permanent magnet 332 are preferably made of magnetic steel.

[0065] The setting of the first magnetic yoke 333 and the second magnetic yoke 334 makes the magnetic field strength of the fixed magnetic field generated by the first permanent magnet 331 and the second permanent magnet 332 more uniform, forming a uniform magnetic field, and confining it in the area where the soft magnet 31 is located, shielding the electromagnetic induction lines diffusing outward, preventing magnetic leakage, and increasing the electromagnetic driving force that drives the soft magnet 31 and the vibration plate 22 to perform reciprocating vibration.

[0066] The principle of the electromagnetic drive mechanism 3 of this structure driving the vibration plate 22 to vibrate is: when the coil 32 is not energized, the first permanent magnet 331 and the second permanent magnet 332 form a first fixed magnetic field and a second fixed magnetic field respectively; since the soft magnet 31 is between the two fixed magnetic fields, the first fixed magnetic field and the second fixed magnetic field both generate attractive forces on the soft magnet 31, and the two attractive forces are of the same magnitude but opposite directions, so that the soft magnet 31 is in a balanced state.

[0067] If the coil 32 is powered in the forward direction, the coil 32 generates an electromagnetic field. For example, the end facing the first permanent magnet 331 is the N pole, and the end facing the second permanent magnet 332 is the S pole. The soft magnet 31 is magnetized by the electromagnetic field generated by the coil 32. The end facing the first permanent magnet 331 is the N pole, and the end facing the second permanent magnet 332 is the S pole. The soft magnet 31 is subjected to the downward repulsive force of the first fixed magnetic field (for example, the end of the first permanent magnet 331 close to the soft magnet 31 is the N pole) and the downward attractive force of the second fixed magnetic field (the end of the first permanent magnet 331 close to the soft magnet 31 is the N pole). Under the combined force, the soft magnet 31 drives the vibration plate 22 to vibrate downward. When the coil 32 is powered in the reverse direction, the soft magnet 31 is magnetized by the electromagnetic field generated by the coil 32. The end facing the first permanent magnet 331 is the S pole, and the end facing the second permanent magnet 332 is the N pole. The soft magnet 31 is attracted by the first fixed magnetic field and repelled by the second fixed magnetic field. Under the combined upward force, the soft magnet 31 drives the vibration plate 22 to vibrate upward, so that the vibration plate 22 vibrates back and forth in the vertical direction, thereby driving the sound-generating membrane 23 to agitate the air to make sound.

[0068] When the vibration plate 22 vibrates upward, the coil 32 is de-energized, and the soft magnetic body 31 drives the vibration plate 22 to return to the initial state position under the attraction of the first fixed magnetic field and the second fixed magnetic field.

[0069] like Figure 1 As shown, the above-mentioned receiver also includes a sound outlet hole 131 opened on the side wall surface of the first cavity 13 and a sound guide tube 15 fixed on the outer surface of the housing 1 and including the sound outlet hole 131. When the vibration plate 22 vibrates, the sound diaphragm 23 is driven to agitate the air in the first cavity 13 and the second cavity 14 to move, and the sound emitted in the first cavity 13 enters the sound guide tube 15 through the sound outlet hole 131 and then propagates out.

[0070] The above-mentioned receiver also includes a tuning hole 141 opened on the side wall of the second cavity 14, and a tuning tube 142 inserted into the tuning hole 141 and located in the second cavity 14; due to the setting of the tuning tube 142, the second cavity 14 is connected to the outside, and when the vibration plate 22 vibrates, the external gas enters the second cavity 14 through the tuning tube 142 or is discharged from the second cavity 14 to increase or decrease the pressure of the gas in the second cavity 14, thereby making it easier for the vibration plate 22 to vibrate upward or downward, thereby adjusting the pronunciation of the receiver and improving the sensitivity of the vibration plate 22.

[0071] In addition, the vibration plate 22 in the diaphragm mechanism 2 can be made of magnetic conductive material or non-magnetic conductive material. If the vibration plate 22 is made of magnetic conductive material, the electromagnetic field cooperates with the fixed magnetic field to exert force on the vibration plate 22 and the soft magnetic body 31, and the magnetized part is not only the soft magnetic body 31, but also the vibration plate 22, so that the vibration plate 22 can be driven to vibrate more effectively and the sensitivity of the receiver can be increased. If the vibration plate 22 is made of non-magnetic conductive material, the vibration plate 22 is driven only by the action of the soft magnetic body 31 and the fixed magnetic field and electromagnetic field, but the reciprocating vibration of the vibration plate 22 can also be achieved.

[0072] In the receiver of this embodiment, the diaphragm mechanism 2 does not need to be indirectly fixed to the housing 1 through the annular isolation tube, but the housing 1 is configured as two shells, and the fixing frame 21 of the diaphragm mechanism 2 is directly installed on the housing 1, so that the components in the receiver are reduced, the structure and installation process of the receiver are simplified, and a modular assembly process is formed. The specific assembly process (abbreviated as A assembly process) is:

[0073] S1: pre-fix the first magnetic yoke 333 on the inner wall surface of the first housing 11, and then fix the first permanent magnet 331 on the first magnetic yoke 333 to form a first module;

[0074] A tuning tube 142 is pre-installed on the tuning hole 141 on the side wall of the second housing 12, a second yoke 334 is fixed on the inner wall of the second housing 12, and a second permanent magnet 332 is fixed on the second yoke 334, and a coil 32 is fixed on the inner wall of the second housing 12 and located above the second permanent magnet 332, so as to form a second module;

[0075] The soft magnetic body 31 is pre-fixed on the surface of the vibration plate 22 of the diaphragm mechanism 2 on the side facing away from the sound producing membrane 23 to form a third module;

[0076] S2: inserting the soft magnetic body 31 in the diaphragm mechanism 2 into the coil 32, and fixing the fixing frame 21 of the diaphragm mechanism 2 between the openings of the first shell 11 and the second shell 12;

[0077] S3: Install the sound guide tube 15 on the outer wall of the housing 1 so that the sound guide tube 15 includes the sound outlet hole 131 on the wall of the first cavity 13 in its inner cavity.

[0078] As a first alternative implementation, the soft magnetic body 31 can be other existing soft magnetic bodies besides the iron core, such as iron silicon alloy, etc. It only needs to be magnetized under the action of the magnetic field and can drive the vibration plate 22 to reciprocate under the drive of the magnetic field.

[0079] As a further alternative implementation, the first permanent magnet 331 and the second permanent magnet 332 may be other permanent magnets besides magnetic steel, such as neodymium iron boron permanent magnets, as long as they can have a fixed magnetic field.

[0080] As a second alternative implementation, the tuning hole 141 may also be opened at other positions of the second shell 12 , such as the second bottom surface of the second shell 12 , as long as the air in the second cavity 14 can freely flow in and out through the tuning hole 141 .

[0081] As a third alternative embodiment, the above-mentioned tuning hole 141 and tuning tube 142 may not be provided, and only the sound outlet hole 131 is provided on the first housing 11, and the sound guide tube 15 is fixed on the first housing 11 to surround the sound outlet hole 131. At this time, the sound in the first cavity 13 enters the sound guide tube 15 from the sound outlet hole 131 and then propagates out. The assembly process of the receiver of this embodiment is different from the assembly process A in that: in step S1, the tuning tube 142 does not need to be installed.

[0082] As a fourth alternative embodiment, the fixing frame 21 in the diaphragm mechanism 2 can also be arranged on the inner wall surface of the side wall of the first shell 11, or on the inner wall surface of the side wall of the second shell 12. It is only necessary for the diaphragm mechanism 2 to be fixed on the outer shell 1, and the inner cavity of the outer shell 1 is divided into a first cavity 13 close to the first bottom surface and a second cavity 14 close to the second bottom surface. However, compared with the above-mentioned assembly process A, the assembly process of the receiver in this embodiment is different from step S2 in that the tuning tube 142 is not installed in step S1. Specifically: the soft magnetic body 31 in the diaphragm mechanism 2 is inserted into the coil 32, and the fixing frame 21 of the vibration mechanism 2 in the second module is fixed on the inner surface of the side wall of the first shell 11 or the second shell 12, such as by gluing or spot welding, and then the openings of the first shell 11 and the second shell 12 are snap-fitted and fixedly connected, such as by gluing or spot welding.

[0083] As a fifth alternative implementation, on the basis of not providing the tuning hole 141 and the tuning tube 142, the first yoke 333 may also be not provided, and the first permanent magnet 331 is directly fixed on the inner wall surface of the first housing 11. In this implementation, the assembly process of the receiver is different from the above-mentioned assembly process A in terms of only steps S1 and S2. Specifically:

[0084] S1: pre-fix the first permanent magnet 331 directly on the inner wall surface of the first shell 11 to form a first module;

[0085] The second yoke 334 is fixed on the inner wall surface of the second shell 12, and the second permanent magnet 332 is fixed on the second yoke 334, and the coil 32 is fixed on the inner wall surface of the second shell 12 and located above the second permanent magnet 332, so as to form a second module;

[0086] The soft magnetic body 31 is pre-fixed on the surface of the vibration plate 22 of the diaphragm mechanism 2 on the side facing away from the sound producing membrane 23 to form a third module.

[0087] S2: insert the soft magnetic body 31 in the diaphragm mechanism 2 into the coil 32, fix the fixing frame 21 of the diaphragm mechanism 2 on the housing 1, and then fix the openings of the first housing 11 and the second housing 12 together.

[0088] Similar to the fifth alternative embodiment, on the basis of not providing the tuning hole 141 and the tuning tube 142, the second yoke 334 may also be not provided, and the second permanent magnet 332 is directly fixed on the inner wall surface of the second shell 12. Correspondingly, in the assembly process, the second yoke 334 is not provided, and the second permanent magnet 332 is directly fixed on the inner wall surface of the second shell 12.

[0089] As a sixth alternative embodiment, on the basis of not providing the tuning hole 141, the tuning tube 142, and the first yoke 333, the second yoke 334 is not provided, and the second permanent magnet 332 is directly fixed on the inner wall surface of the second shell 12. In this embodiment, the assembly process thereof is different from that of the fifth alternative embodiment in that: in step S1, the second yoke is not provided, and the second permanent magnet 332 is directly fixed on the inner wall surface of the second shell 12.

[0090] As a seventh replaceable embodiment, without setting the tuning hole 141, the tuning tube 142, the first yoke 333, and the second yoke 334, the coil 32 may not be fixed on the inner wall surface of the second cavity 14 of the shell 1, but may be supported in the second cavity 14 by a support frame fixed in the second cavity 14. For example, a support frame is fixed on the inner surface of the bottom of the second shell 12, and the coil 32 is fixed on the support frame. The required gaps are reserved between the end face of the coil 32 close to the vibration plate 22 and the vibration plate 22, and between the inner hole wall of the coil 32 and the outer peripheral wall of the soft magnetic body 31. In this embodiment, its assembly process is different from the above-mentioned A assembly process only in S1 and S2. Specifically:

[0091] S1: pre-fixing the first permanent magnet 331 on the inner wall surface of the first shell 11 to form a first module;

[0092] Fixing the second permanent magnet 332 on the inner wall surface of the second shell 12 to form a second module;

[0093] The soft magnetic body 31 is fixed in advance on the surface of the vibration plate 22 of the diaphragm mechanism 2 on the side facing away from the sound producing membrane 23, and the coil 32 is sleeved on the outer periphery of the soft magnetic body 31 and fixed on the inner wall surface of the second cavity 14 through a supporting frame to form a third module;

[0094] S2: Fix the fixing frame 21 of the diaphragm mechanism 2 on the housing 1, and then fix the openings of the first housing 11 and the second housing 12 together.

[0095] As a variation of the seventh alternative embodiment, without setting the tuning hole 141, the tuning tube 142, the first yoke 333, and the second yoke 334, the coil 32 may not be fixed on the inner wall surface of the second cavity 14, but may be fixed on the vibration plate 22 with one end facing the vibration plate 22. In this embodiment, the assembly process thereof is different from the above-mentioned assembly process A in terms of steps S1 and S2. Specifically:

[0096] S1: pre-fixing the first permanent magnet 331 on the inner wall surface of the first shell 11 to form a first module;

[0097] Fixing the second permanent magnet 332 on the inner wall surface of the second shell 12 to form a second module;

[0098] The soft magnetic body 31 is fixed in advance on the surface of the vibration plate 22 of the diaphragm mechanism 2 on the side facing away from the sound producing membrane 23, and the coil 32 is sleeved on the outer periphery of the soft magnetic body 31 and fixed on the vibration plate 22 to form a third module;

[0099] S2: Fix the fixing frame 21 of the diaphragm mechanism 2 on the housing 1, and then fix the openings of the first housing 11 and the second housing 12 together.

[0100] As an eighth alternative embodiment, the tuning hole 141, the tuning tube 142, the first magnetic yoke 333, the second magnetic yoke 334, and the coil 32 fixed to the vibration plate 22 are not provided, and the soft magnetic body 31 can also be not provided. In this embodiment, the assembly process thereof is different from the above-mentioned assembly process A in terms of steps S1 and S2. Specifically:

[0101] S1: pre-fix the first permanent magnet 331 on the inner wall surface of the first shell 11;

[0102] Fixing the second permanent magnet 332 on the inner wall surface of the second shell 12;

[0103] The coil 32 is fixed on the vibration plate 22 in advance and is located above the second permanent magnet 334 to form a third module;

[0104] S2: Fix the fixing frame 21 of the diaphragm mechanism 2 on the housing 1, and then fix the openings of the first housing 11 and the second housing 12 together.

[0105] As a ninth alternative embodiment, without setting the tuning hole 141, tuning tube 142, first yoke 333, second yoke 334 and soft magnet 31, and with the coil 32 fixed on the vibration plate 22, the first permanent magnet 331 and the second permanent magnet 332 may not be arranged relative to each other, as long as the fixed magnetic field generated by the first permanent magnet 331 and the second permanent magnet 332 can generate a force on the energized coil 32, so that the vibration plate 22 vibrates in the vertical direction, so as to realize the reciprocating vibration of the pronunciation membrane 23, and then agitate the air to vibrate and produce sound. As a further variation, the first permanent magnet 331 may not be set, and only the second permanent magnet 332 may be set. In the receiver of this structure, when the coil 32 is energized, when the electromagnetic field generated by the coil 32 has an opposite polarity to the opposite end of the second permanent magnet 332, the second permanent magnet 332 generates a downward attractive force on the coil 32, and the coil 32 drives the vibration plate 22 to vibrate downward; when the electromagnetic field generated by the coil 32 has the same polarity as the opposite end of the second permanent magnet 332, the second permanent magnet 332 generates an upward repulsive force on the coil 32, and the coil 32 drives the vibration plate 22 to vibrate upward. The electromagnetic field generated by the coil 32 and the fixed magnetic field of the second permanent magnet 332 interact with each other, so that the vibration plate 22 vibrates in the vertical direction, so as to realize the reciprocating vibration of the pronunciation membrane 23, and then encourage the air to vibrate and make sounds. In this embodiment, its assembly process is compared with the above-mentioned A assembly process, and only steps S1 and S2 are different. Specifically:

[0106] S1: The first housing 11 serves as a first module;

[0107] Fixing the second permanent magnet 332 on the inner wall surface of the second shell 12 to form a second module;

[0108] The coil 32 is pre-fixed on the vibration plate 22 and is located above the second permanent magnet 332 to form a third module;

[0109] S2: Fix the fixing frame 21 of the diaphragm mechanism 2 on the housing 1, and then fix the openings of the first housing 11 and the second housing 12 together.

[0110] Similar to the ninth alternative embodiment, only the first permanent magnet 331 may be provided without the second permanent magnet 332 .

[0111] 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, characterized in that: include The housing (1) comprises a first shell (11) formed by a first bottom surface and a side wall, and a second shell (12) formed by a second bottom surface and a side wall; the second shell (12) is detachably fastened to the first shell (11) to enclose an inner cavity; A diaphragm mechanism (2) is arranged on the housing (1) to divide the inner cavity of the housing (1) into a first cavity (13) close to the first bottom surface and a second cavity (14) close to the second bottom surface; it has a vibration plate (22) with one end suspended in the inner cavity; An electromagnetic drive mechanism is arranged in the inner cavity and comprises at least one coil (32) and a magnetic field component, wherein the fixed magnetic field generated by the magnetic field component cooperates with the electromagnetic field generated by the coil (32) to drive the vibration plate (22) to reciprocate in a direction perpendicular to the direction in which the vibration plate (22) is arranged; The diaphragm mechanism (2) further comprises a fixing frame (21), one end of the vibration plate (22) is fixed on the fixing frame (21), and the other end is suspended in the fixing frame (21); The fixing frame (21) is fixed at the opening between the first shell (11) and the second shell (12); A gap (24) is reserved between the outer surface of the other end of the vibration plate (22) which is suspended and the inner wall surface of the fixing frame (21); The pronunciation membrane (23) is attached to the entire fixed frame (21) and is also adhered to the surface of the vibration plate (22) on one side facing the first cavity (13), and seals a reserved gap (24) formed between the suspended end of the vibration plate (22) and the fixed frame (21); The pronunciation membrane (23) has a protrusion protruding toward one side of the first cavity (13) at a position corresponding to the reserved gap (24).

2. The receiver according to claim 1, characterized in that: The electromagnetic drive mechanism further comprises a soft magnetic body (31) fixed on the surface of the vibration plate (22) on the side facing the second cavity (14); the coil (32) is sleeved on the soft magnetic body (31) and is located in the second cavity (14); and a gap is reserved between the inner wall surface of the coil (32) and the outer wall surface of the soft magnetic body (31); The magnetic field component drives the soft magnetic body (31) magnetized by the electromagnetic field to drive the vibration plate (22) to perform reciprocating vibration.

3. The receiver according to claim 1, characterized in that: The coil (32) is fixed on a surface of the vibration plate (22) on a side facing the second cavity (14), and a required gap is reserved between the coil (32) and the magnetic field component.

4. The receiver according to claim 2 or 3, characterized in that: The magnetic field assembly comprises a first permanent magnet (331) fixed in the first cavity (13), and a second permanent magnet (332) fixed in the second cavity (14) and arranged opposite to the first permanent magnet (331); the polarities of the ends of the first permanent magnet (331) and the second permanent magnet (332) facing each other are the same, and a required vibration gap is reserved between both ends and the vibration plate (22), and the coil (32) is located in the vibration gap in the second cavity (14).

5. The receiver according to claim 4, characterized in that: The magnetic field assembly further comprises a first magnetic yoke (333) arranged on the inner wall surface of the first shell (11), and one end of the first permanent magnet (331) facing away from the vibration plate (22) is fixed on the first magnetic yoke (333); and / or A second magnetic yoke (334) is arranged on the inner wall surface of the second shell (12), and one end of the second permanent magnet (332) facing away from the vibration plate (22) is fixed on the second magnetic yoke (334).

6. The receiver according to claim 2, 4 or 5, characterized in that: When corresponding to the soft magnetic body (31), the coil (32) is fixed on the inner wall surface of the housing (1) located in the second cavity (14).

7. The receiver according to any one of claims 1 to 6, characterized in that: The invention also comprises a sound outlet hole (131) and a tuning hole (141) respectively provided on the wall surfaces of the housing (1) located in the first cavity (13) and the second cavity (14); a tuning tube (142) installed on the tuning hole (141) and located in the second cavity (14); and a sound guide tube (15) fixed on the outer wall surface of the housing (1) and containing the sound outlet hole (131) therein.

8. A receiver assembly process, characterized in that: The steps include: S1: pre-fixing a first permanent magnet (331) on an inner wall surface of a first housing (11); The second permanent magnet (332) is fixed on the inner wall surface of the second shell (12), and the coil (32) is fixed on the inner wall surface of the second shell (12) and is located above the second permanent magnet (332); The soft magnetic body (31) is pre-fixed on the surface of the vibration plate (22) of the vibration membrane mechanism (2) on the side facing away from the sound-generating membrane (23); S2: inserting the soft magnetic body (31) on the diaphragm mechanism (2) into the coil (32), fixing the fixing frame (21) of the diaphragm mechanism (2) on the inner wall surface of the first shell (11) or the second shell (12), and then fixing the openings of the first shell (11) and the second shell (12) together; or The soft magnetic body (31) on the diaphragm mechanism (2) is extended into the coil (32), and the fixing frame (21) of the diaphragm mechanism (2) is fixed between the openings of the first shell (11) and the second shell (12).

9. The receiver assembly process according to claim 8, characterized in that: The receiver also includes a first magnetic yoke (333) and a second magnetic yoke (334); In step S1, the first magnetic yoke (333) is fixed on the inner wall surface of the first shell (11) in advance, and then the first permanent magnet (331) is fixed on the first magnetic yoke (333); The second magnetic yoke (334) is fixed on the inner wall surface of the second shell (12) in advance, and then the second permanent magnet (332) is fixed on the second magnetic yoke (334).

10. The receiver assembly process according to claim 8 or 9, characterized in that: The receiver also includes a tuning tube (142); In step S1, a tuning tube (142) is pre-installed on a tuning hole (141) on a side wall of a second housing (12); After step S2, the method further includes installing a sound guide tube (15) on the outer wall surface of the outer shell (1), so that the sound guide tube (15) contains the sound outlet hole (131) on the first shell (11) in its inner cavity.

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