A receiver and an electronic device

Abstract

This invention discloses a receiver and an electronic device, comprising a housing with a cavity; a motor assembly disposed within the cavity, including a magnetic circuit assembly. The magnetic circuit assembly includes a first magnetic guide and a second magnetic guide disposed opposite to each other. The first magnetic guide is connected between two opposite side walls of the housing, and the second magnetic guide is connected to the bottom wall of the housing. The first magnetic guide, the second magnetic guide, and the housing together form a magnetic circuit. This invention discloses a receiver and an electronic device that can simplify component structure while maintaining or further improving product performance.

Description

Technical Field

[0001] This invention relates to the field of sound-to-electric conversion, and particularly to a receiver and an electronic device. Background Technology

[0002] A balanced armature receiver is a sound-to-electric transducer, typically used as a sound-generating device to convert electrical signals into sound. It is mainly used in headphones, hearing aids, wearable devices that can produce sound, and the sound-generating units of electronic products that can produce sound.

[0003] Existing technologies typically use a front guard as the carrier of the magnetic circuit, fixing the magnet to it. Common front guards are U-shaped, a relatively complex part with very high dimensional accuracy requirements. However, controlling the dimensional accuracy of front guards is difficult, and unstable dimensions often lead to scrapped incoming materials or even semi-finished products, resulting in waste of materials and labor, and hindering cost control. Furthermore, due to the complex structure of the front guard, the receiver assembly process requires manual installation of magnets into the front guard, which is difficult and not easy to automate, thus hindering the development of enterprises and the industry.

[0004] To address the problems caused by the aforementioned front guard, existing technologies have also seen designs that eliminate the front guard. In one design, the front guard is typically made up of multiple magnetic components joined together. To install these magnetic components, it is often necessary to stamp placement slots into the receiver's housing. This not only presents precision challenges to existing stamping processes but may also affect the receiver's performance due to changes in the housing structure, which is also detrimental to the development of enterprises and the industry. Summary of the Invention

[0005] The purpose of this invention is to provide a receiver and an electronic device that can simplify the component structure while maintaining or further improving product performance.

[0006] To address the aforementioned technical problems, this invention provides a receiver, comprising:

[0007] The housing has a cavity.

[0008] A motor assembly, disposed within the cavity, includes a magnetic circuit assembly. The magnetic circuit assembly includes a first magnetic conductor and a second magnetic conductor disposed opposite to each other. The first magnetic conductor is connected between two opposite side walls of the housing, and the second magnetic conductor is connected to the bottom wall of the housing. The first magnetic conductor, the second magnetic conductor, and the housing surround each other to form a magnetic circuit.

[0009] Preferably, the magnetic circuit assembly further includes a first magnet connected to the first magnetic conductor and a second magnet connected to the second magnetic conductor, the first magnet and the second magnet being disposed opposite to each other, and a limiting component being disposed between the first magnetic conductor and the second magnetic conductor to form a stable magnetic gap in the magnetic circuit assembly.

[0010] Preferably, the limiting component includes a bridging member connecting the first magnet and the second magnet, the bridging member having a cutout through which the reed of the motor assembly passes.

[0011] Preferably, the bridging component includes two bodies disposed opposite to each other, the bodies being disposed within the magnetic circuit assembly, and the hollow portion being formed between the two bodies.

[0012] Preferably, the bridging component includes two bodies disposed opposite to each other, one end of the body is disposed inside the magnetic circuit assembly, and the other end extends outward from the magnetic circuit assembly to abut against the housing, and the hollow portion is formed between the two bodies.

[0013] Preferably, the bridging member includes two bodies disposed opposite to each other and a connecting portion connecting the ends of the two bodies. The bodies are disposed within the magnetic circuit assembly, and the connecting portion extends outward from the magnetic circuit assembly to abut against the housing. The hollow portion is formed between the two bodies and the connecting portion.

[0014] Preferably, the limiting component includes raised steps respectively disposed on two opposite side walls of the housing, and the first magnetic conductive element is mounted on the raised steps.

[0015] Preferably, the housing is made of a magnetically conductive material.

[0016] Preferably, the receiver further includes a cover connected to the housing and a diaphragm assembly disposed within the cover;

[0017] The motor assembly also includes a coil and a drive element. The coil is disposed adjacent to the magnetic circuit assembly. One end of the reed of the motor assembly is fixedly connected to the outside of the magnetic circuit assembly, and the other end moves through the coil and the magnetic circuit assembly in sequence. The drive element is installed between the reed and the diaphragm assembly to transmit vibration.

[0018] On the other hand, the present invention also proposes an electronic device comprising the aforementioned receiver.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] The receiver and electronic device of the present invention eliminates the complex edge iron structure. The magnetic circuit is formed by a first magnetic conductor, a second magnetic conductor, and a housing, which simplifies the component structure of the product. At the same time, the first magnetic conductor adopts an embedded design and is set inside the housing, eliminating the need for a relief slot stamping process on the outer shell. While maintaining a better appearance and structural integrity, it also maintains the optimal magnetic circuit structure and minimizes magnetic leakage, thus maintaining or further improving product performance.

[0021] In a preferred embodiment, a limiting component is used to control the magnetic gap of the magnetic circuit component, which improves the accuracy and consistency of the magnetic gap, helps to reduce distortion, and thus improves the acoustic performance of the receiver.

[0022] In a preferred embodiment, the limiting component uses a bridging fastener that abuts against the housing. While controlling the magnetic gap, it also positions the motor assembly within the housing, improving the assembly accuracy of the product and thus enhancing the acoustic performance of the receiver. Attached Figure Description

[0023] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and are not intended to specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances. In the drawings:

[0024] Figure 1 This is an exploded view of the receiver in this invention;

[0025] Figure 2 This is a cross-sectional view of the receiver in this invention;

[0026] Figure 3 This is a cross-sectional view of the receiver in this invention from another perspective;

[0027] Figure 4 This is a schematic diagram of the assembly of the motor assembly and the housing in this invention;

[0028] Figure 5 This is a cross-sectional view of the receiver in this invention equipped with a bridging component;

[0029] Figure 6 This is an exploded view of the receiver in Embodiment 1 of the present invention;

[0030] Figure 7 This is an exploded view of the receiver in Embodiment 2 of the present invention;

[0031] Figure 8 This is an exploded view of the receiver in Embodiment 3 of the present invention;

[0032] Figure 9 This is a cross-sectional view of the receiver in Embodiment 4 of the present invention.

[0033] As shown in the figure:

[0034] 11. Cover; 12. Shell; 121. First sidewall; 122. Second sidewall; 123. Third sidewall; 124. Fourth sidewall; 125. Cavity; 13. Front cavity; 14. Rear cavity; 15. Sound outlet; 2. Diaphragm assembly; 31. Coil; 32. Magnetic circuit assembly; 321. First magnetic conductor; 322. Second magnetic conductor; 323. First magnet; 324. Second magnet; 33. Reed; 331. Bending part; 332. Fixing part; 333. Vibrating part; 34. Driving part; 4. Terminal; 51. Bridging part; 511. Body; 512. Hollowed-out part; 513. Connecting part; 52. Raised step. Detailed Implementation

[0035] To enable those skilled in the art to better understand the technical solutions of this invention, the technical solutions of the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of this invention.

[0036] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the specification of this invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0038] like Figures 1 to 3 As shown, a receiver corresponding to a preferred embodiment of the present invention includes a housing with a receiving cavity, a diaphragm assembly 2 disposed within the receiving cavity and interconnected with it, and a motor assembly.

[0039] The outer casing includes a cover 11 and a housing 12 that can be closed to each other. A diaphragm assembly 2 is disposed within the cover 11 to divide the accommodating cavity into a front cavity 13 and a rear cavity 14. A sound outlet 15 communicating with the front cavity 13 is provided on the cover 11. Sound generated by the diaphragm assembly 2 in the front cavity 13 is transmitted through the sound outlet 15. Preferably, the sound outlet 15 is located on the side wall of the cover 11. The housing 12 is made of a magnetically permeable material, preferably a high-permeability material, and its magnetic permeability is improved by magnetic annealing. A cavity 125 is disposed within the housing 12, and a motor assembly is disposed within the cavity 125.

[0040] The diaphragm assembly 2 includes a fixed frame, a vibrating plate, and a diaphragm. The edge of the fixed frame is fixed inside the cover 11 and sealed with adhesive. The vibrating plate is located in the hollow part of the fixed frame and hinged to one end of the fixed frame. The diaphragm covers the entire fixed frame and the vibrating plate. Specifically, one end of the vibrating plate overlaps with one end of the fixed frame and is joined by adhesive to form a hinge. Except for the hinge, there is a certain gap between the vibrating plate and the fixed frame around its perimeter to facilitate the up-and-down vibration of the vibrating plate. While the diaphragm covers the entire fixed frame and the vibrating plate, an arched structure, called a racetrack, is formed in the gap between the fixed frame and the vibrating plate to achieve the swing amplitude. A mounting hole is provided at the end of the vibrating plate away from the hinge. The drive component 34 of the motor assembly passes through the mounting hole and is connected to the vibrating plate by adhesive, thereby realizing the vibration of the diaphragm assembly 2 driven by the motor assembly.

[0041] like Figure 1 As shown, the motor assembly includes a coil 31, a magnetic circuit assembly 32, a reed 33, and a drive element 34.

[0042] The magnetic circuit assembly 32 includes a first magnetic guide 321 and a second magnetic guide 322 disposed opposite to each other. Preferably, the first magnetic guide 321 and the second magnetic guide 322 are configured in a plate shape. The first magnetic guide 321 is connected between two opposite side walls of the housing 12, and the second magnetic guide 322 is connected to the bottom wall of the housing 12. Here, the opposite arrangement of the first magnetic guide 321 and the second magnetic guide 322 can be understood as the orthographic projection of the first magnetic guide 321 having a portion that overlaps with the orthographic projection of the second magnetic guide 322. More preferably, the first magnetic guide 321 is at least partially aligned with the second magnetic guide 322, that is, the orthographic projection of the first magnetic guide 321 has a portion that completely overlaps with the orthographic projection of the second magnetic guide 322. The first magnetic guide 321, the second magnetic guide 322, and the side walls and bottom wall of the housing 12 surround each other to form a magnetic circuit. This replaces the original "U"-shaped edge iron structure, simplifies the product structure, and reduces the difficulty of assembly process.

[0043] Specific examples Figure 4As shown, the housing 12 includes a first sidewall 121, a second sidewall 122, a third sidewall 123, and a fourth sidewall 124. The first sidewall 121 and the third sidewall 123 are arranged opposite to each other, and the second sidewall 122 and the fourth sidewall 124 are arranged opposite to each other. A first magnetic conductor 321 is connected between the second sidewall 122 and the fourth sidewall 124. The magnetic circuit is formed by the first magnetic conductor 321, the second sidewall 122, the fourth sidewall 124, the second magnetic conductor 322, and the bottom wall of the housing 12. An embedded design is adopted here, with the first magnetic conductor 321 placed inside the housing 12. Therefore, the cover 11 and the housing 12 can be easily closed together without any deformation, avoiding the stamping process of slotting on the housing 12 or the cover 11. This simplifies the part design while maintaining a better appearance and structural integrity, and also maintains the optimal magnetic circuit structure and minimizes magnetic leakage.

[0044] Furthermore, the magnetic circuit assembly also includes a first magnet 323 connected to the first magnetic conductor 321 and a second magnet 324 connected to the second magnetic conductor 322. The magnetic conductor and the magnet are fixed by welding or adhesive. The first magnet 323 and the second magnet 324 are arranged opposite to each other, forming a magnetic gap between them. This relative arrangement can be understood as the orthographic projections of the first magnet 323 and the second magnet 324 at least partially overlapping. More preferably, the first magnet 323 and the second magnet 324 are aligned, that is, the orthographic projections of the first magnet 323 and the second magnet 324 completely overlap. In this embodiment, the magnet is preferably a magnetic magnet.

[0045] The coil 31 is disposed adjacent to the magnetic circuit assembly 32 and can be fixed to the bottom of the housing 12 by adhesive. The lead wire of the coil 31 is led out through a through hole opened in the first side wall 121. The first side wall 121 is covered with a terminal 4, which is formed by soldering the lead wire of the coil 31 to the pads on the PCB board. The PCB board is fixed and sealed by adhesive.

[0046] The reed 33 is configured in a U-shape, with one end fixedly connected to the outside of the magnetic circuit assembly 32, and the other end moving sequentially through the coil 31 and the magnetic circuit assembly 32, extending at least partially outside the magnetic circuit assembly 32. Specifically, the reed 33 includes a bent portion 331 and a fixing portion 332 and a vibrating portion 333 connected to both ends of the bent portion 331. The fixing portion 332 and the vibrating portion 333 are arranged opposite to each other, preferably parallel to each other. The fixing portion 332 is fixed to the end of the first magnetic conductor 321 away from the first magnet 323 by welding or adhesive, etc. The vibrating portion 333 moves sequentially through the coil 31 and the magnetic circuit assembly 32, and can move radially along the coil 31 and the magnetic circuit assembly 32. Preferably, the magnetic gap between the vibrating portion 333 and the magnetic circuit assembly is centered. Here, centered can be understood as the vibrating portion 333 being located between the first magnet 323 and the second magnet 324, and the vibrating portion 333 symmetrically dividing the gap between the first magnet 323 and the second magnet 324. The vibrating part 333 extends at least partially beyond the magnetic circuit assembly at one end away from the bending part 331, and is used to fix the driving member 34. The driving member 34 is connected between the reed 33 and the diaphragm assembly 2 to transmit vibration. In this embodiment, the driving member 34 is preferably a driving rod. There is an overlapping area between the vibrating part 333 and the mounting hole. One end of the driving rod is fixed to the vibrating part 333, and the other end is fixed to the vibrating plate.

[0047] Since the magnetic gap of the magnetic circuit assembly (i.e., the distance between the first magnet 323 and the second magnet 324) is a key factor affecting the acoustic performance of the receiver, the size of the magnetic gap needs to be precisely controlled in order to manufacture a high-quality product. When the first magnetic guide 321 is set inside the housing 12, on the one hand, the position of the first magnetic guide 321 can be controlled by a fixture to control the accuracy of the magnetic gap. The current level of machining fixture parts can achieve this well. On the other hand, a limiting component can be set between the first magnetic guide 321 and the second magnetic guide 322 to achieve the purpose of forming a stable magnetic gap in the magnetic circuit assembly 32. Several embodiments of the limiting component are described in detail below.

[0048] Example 1:

[0049] In this embodiment, as Figure 5 As shown, the limiting component includes a bridging member 51 connecting the first magnet 323 and the second magnet 324. The bridging member 51 is provided with a hollow portion 512 for the magnetic field to pass through. The hollow portion 512 can be understood as follows: although the bridging member 51 is provided in the magnetic gap, the bridging member 51 does not affect the movement of the vibrating part 333. The hollow portion 512 provides space for the normal movement of the vibrating part 333.

[0050] In this embodiment, as Figure 6As shown, the bridging component 51 specifically includes two opposing bodies 511. The bodies can be arranged in parallel to achieve an optimal structural design. A hollow portion 512 is formed between the two bodies 511. Both bodies 511 are disposed within the magnetic circuit assembly 32, meaning that the length of the body 511 is less than or equal to the axial length of the magnetic circuit assembly 32. The body 511 connects between the first magnet 323 and the second magnet 324. By controlling the thickness of the body 511, the size of the magnetic gap is precisely controlled, further improving the product's performance without affecting the product structure.

[0051] Example 2:

[0052] In this embodiment, as Figure 7 As shown, a bridging component 51 different from Embodiment 1 is proposed, specifically comprising two opposing bodies 511. The bodies can be arranged parallel to each other to achieve an optimal structural design, and a hollow portion 512 is formed between the two bodies 511. One end of each body 511 is disposed within the magnetic circuit assembly 32, and the other end extends outward from the magnetic circuit assembly 32 to abut against the housing 12. Here, the extension direction of the body 511 is consistent with the extension direction of the vibrating portion 333 of the spring 33, which can be further understood as the body 511 extending to abut against the third sidewall 123. With this design, the body portion disposed within the magnetic circuit assembly 32 can precisely control the size of the magnetic gap through its thickness, while the body portion disposed outside the magnetic circuit assembly 32 positions the motor assembly within the housing 12 by abutting against it. As an adaptive improvement, corresponding positioning components can be provided inside the housing 12, especially on the third sidewall 123, to further improve positioning accuracy. This further improves the assembly precision of the product without affecting its structure and performance.

[0053] Example 3:

[0054] In this embodiment, as Figure 8As shown, a bridging component 51 different from Embodiment 2 is proposed. Specifically, it includes two opposing bodies 511 and a connecting portion 513 connecting the ends of the two bodies 511. Its shape can be simply understood as a "U" shape. A hollow portion 512 is formed between the two bodies 511 and the connecting portion 513. The two bodies 511 are disposed within the magnetic circuit assembly 32, and the magnetic gap size is precisely controlled by the body thickness. The connecting portion 513 extends outward from the magnetic circuit assembly 32 and abuts against the housing 12. Here, the extension direction of the connecting portion 513 is consistent with the extension direction of the vibrating portion 333 of the reed 33. This can be further understood as the connecting portion 513 extending to abut against the third sidewall 123 to position the motor assembly within the housing 12. It should be noted that since one end of the bridging component 51 is closed, the design of the connecting portion 513 must also ensure that it does not affect the movement of the vibrating portion 333 of the reed 33, especially the movement of the portion of the vibrating portion 333 exposed outside the magnetic circuit assembly 32. Similar to Embodiment 2, as an adaptive improvement, corresponding positioning components can be provided inside the housing 12, particularly on the third sidewall 123, to further improve positioning accuracy. This further enhances the product's assembly precision without affecting the product structure or performance.

[0055] Example 4:

[0056] In this embodiment, as Figure 9 As shown, another limiting component is proposed to achieve a stable magnetic gap in the magnetic circuit assembly 32. The limiting component specifically includes raised steps (52) respectively disposed on two opposite side walls of the housing 12. It can be further understood that the raised steps (52) are respectively disposed on the second side wall 122 and the fourth side wall 124, and the opposite raised steps (52) are disposed at the same height. The first magnetic conductor 321 is mounted on the raised steps (52). By controlling the installation position of the first magnetic conductor 321, the size of the magnetic gap can be precisely controlled, which can further improve the performance of the product without affecting the product structure.

[0057] Example 5:

[0058] In this embodiment, an electronic device is proposed, including the aforementioned receiver. The receiver can be structured using any of the optional embodiments described above, or any combination of multiple embodiments can be used to meet the needs of different application scenarios. An electronic device equipped with the aforementioned receiver can achieve higher acoustic performance, thereby improving the user experience.

[0059] The receiver and electronic device of this invention eliminates the complex edge iron structure. The magnetic circuit is formed by a first magnetic conductor, a second magnetic conductor, and a housing, simplifying the product's component structure, facilitating quality control, reducing waste, and lowering raw material costs. Eliminating the edge iron structure also enables miniaturization, overcoming the size limitations of existing technologies and meeting diverse application requirements. The simplified receiver reduces assembly difficulty, facilitating automated production and significantly improving production efficiency. Simultaneously, the first magnetic conductor uses an embedded design, located inside the housing, eliminating the need for any stamping process on the outer shell. This maintains better appearance and structural integrity while preserving the optimal magnetic circuit structure and minimizing magnetic leakage, thus maintaining or further improving product performance. A limiting component controls the magnetic gap of the magnetic circuit components, improving the accuracy of the magnetic gap and consequently enhancing the receiver's acoustic performance. The limiting component uses a bridging fastener that abuts against the housing, controlling the magnetic gap and positioning the motor assembly within the housing, improving assembly accuracy and further enhancing the receiver's acoustic performance.

[0060] It should be understood that the above description is for illustrative purposes and not for limitation. Many embodiments and applications beyond the provided examples will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of this teaching should not be determined by reference to the above description, but rather by reference to the foregoing claims and the full scope of their equivalents. For purposes of completeness, all articles and references, including patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended as a waiver of that subject matter, nor should it be construed as an indication that the applicant has not considered that subject matter as part of the disclosed inventive subject matter.

Claims

1. A receiver, characterized in that, include: The housing (12) is provided with a cavity (125); A motor assembly, disposed within the cavity (125), includes a magnetic circuit assembly (32). The magnetic circuit assembly (32) includes a first magnetic conductor (321) and a second magnetic conductor (322) disposed opposite to each other. The first magnetic conductor (321) is connected between two opposite side walls of the housing (12), and the second magnetic conductor (322) is connected to the bottom wall of the housing (12). The first magnetic conductor (321), the second magnetic conductor (322), and the housing (12) surround each other to form a magnetic circuit. The magnetic circuit assembly (32) further includes a first magnet (323) connected to the first magnetic conductor (321) and a second magnet (324) connected to the second magnetic conductor (322). The first magnet (323) and the second magnet (324) are arranged opposite to each other. A limiting component is provided between the first magnetic conductor (321) and the second magnetic conductor (322) to form a stable magnetic gap in the magnetic circuit assembly (32). The limiting component includes a bridge (51) connected between the first magnet (323) and the second magnet (324). The bridge (51) is provided with a hollow portion (512) through which the spring (33) of the motor assembly passes. Among them, the fixing part (332) and the vibrating part (333) of the reed (33) are arranged opposite to each other, and the vibrating part (333) symmetrically divides the gap between the first magnet (323) and the second magnet (324); The bridging member (51) includes two bodies (511) disposed opposite to each other, the bodies (511) being disposed within the magnetic circuit assembly (32), and the hollow portion (512) being formed between the two bodies (511); or, The bridging component (51) includes two bodies (511) arranged opposite to each other. One end of each body (511) is disposed inside the magnetic circuit assembly (32), and the other end extends outward from the magnetic circuit assembly (32) to abut against the housing (12). The hollow portion (512) is formed between the two bodies (511); or, The bridging component (51) includes two bodies (511) disposed opposite to each other and a connecting portion (513) connecting the ends of the two bodies (511). The bodies (511) are disposed inside the magnetic circuit assembly (32), and the connecting portion (513) extends outward from the magnetic circuit assembly (32) and abuts against the housing (12). The hollow portion (512) is formed between the two bodies (511) and the connecting portion (513).

2. The receiver according to claim 1, characterized in that, The housing (12) is made of magnetically conductive material.

3. The receiver according to claim 2, characterized in that, The receiver also includes a cover (11) connected to the housing (12) and a diaphragm assembly (2) disposed in the cover (11). The motor assembly also includes a coil (31) and a drive (34). The coil (31) is arranged adjacent to the magnetic circuit assembly (32). One end of the reed (33) of the motor assembly is fixedly connected to the outside of the magnetic circuit assembly (32), and the other end moves through the coil (31) and the magnetic circuit assembly (32) in sequence. The drive (34) is installed between the reed (33) and the diaphragm assembly (2) to transmit vibration.

4. An electronic device, characterized in that, The electronic device includes a receiver as described in any one of claims 1-3.

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