Sound production unit

Abstract

The utility model discloses a sounding unit, including magnetic circuit subassembly, current-conducting plate, centering disk and vibration subassembly, magnetic circuit subassembly includes support portion, yoke, and central magnetic structure and side magnetic structure that are respectively provided on the yoke, side magnetic structure is provided around central magnetic structure, central magnetic structure includes central magnetic steel and central washer, the central magnetic steel is connected with the central washer and the yoke, the bottom surface of the yoke is provided with a groove and a wiring groove which are communicated with each other, the central washer is provided with a hollow window, the central magnetic steel is provided with a through hole which is communicated with the hollow window and the groove, the supporting part is positioned in the hollow window and is connected with the central magnetic steel, and the top surface of the supporting part is higher than the top surface of the central washer; the conductive plate comprises an inner mounting part, a connecting part and a wiring part which are connected in sequence, the inner mounting part is fixed on the top surface of the supporting part, an inner bonding pad is arranged on the inner mounting part, the connecting part is arranged in the through hole in a penetrating manner, the wiring part is accommodated in the wiring groove, and an outer bonding pad conducted with the inner bonding pad is arranged at one end, far away from the connecting part, of the wiring part. The sound production unit has high performance.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a sound generating unit. Background Technology

[0002] With the development of science and technology, portable electronic devices such as mobile phones, handheld game consoles, and navigation devices are widely used in people's daily lives. Among these portable electronic devices, the electroacoustic transducer is an essential component. The quality of voice directly affects the user experience when using these portable electronic devices. Therefore, the requirements for the sound-generating unit used in these devices are becoming increasingly higher.

[0003] In related technologies, the sound unit usually uses a centering support to conduct and / or support the voice coil. However, placing the centering support at the four corners of the sound unit or on the short axis of the sound unit will undoubtedly occupy some space of the magnetic circuit assembly. This will limit the size of the side magnets of the magnetic circuit assembly, making it impossible to increase their size. This will reduce the magnetic field strength of the magnetic circuit assembly, reduce the BL value of the sound unit, and affect the acoustic performance of the sound unit. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a high-performance sound generating unit.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising:

[0006] A magnetic circuit assembly includes a support, a yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The side magnetic structure surrounds the central magnetic structure. The central magnetic structure includes a central magnet and a central washer. The central magnet connects the central washer and the yoke. The bottom surface of the yoke has a groove and a wiring groove that are connected. The central washer has a perforated window. The central magnet has a through hole that connects the perforated window and the groove. The support is located at the perforated window and connected to the central magnet. The top surface of the support is higher than the top surface of the central washer.

[0007] The conductive plate includes an inner mounting part, a connecting part, and a wiring part connected in sequence. The inner mounting part is fixed on the top surface of the support part and has an inner pad. The connecting part passes through the through hole and the wiring part is housed in the wiring groove. The end of the wiring part away from the connecting part has an outer pad that is in communication with the inner pad.

[0008] The centering support includes an inner fixing part, a deformation part and an outer fixing part connected in sequence. The inner fixing part is fixed on the inner mounting part, and the deformation part and the outer fixing part are both set corresponding to the openwork window.

[0009] The vibration assembly includes a connected diaphragm assembly and a voice coil. The central region of the diaphragm assembly is fixed to the inner fixing part, and the outer fixing part is fixed to the diaphragm assembly.

[0010] The centering support plate connects the inner solder pad and the voice coil.

[0011] In one embodiment, the central region of the diaphragm assembly has a window, and the edge of the window is fixed to the inner fixing part.

[0012] In one embodiment, the inner fixing part is provided with an exposed solder pad, the exposed solder pad is connected to the voice coil, and the exposed solder pad is exposed through the window.

[0013] In one embodiment, the top surface of the central magnet has a clearance groove corresponding to the outer fixing part, the clearance groove is connected to the hollow window, and the clearance groove is a blind groove or a through groove.

[0014] In one embodiment, the support portion is an insulating structural component.

[0015] In one embodiment, the support is a magnet, and the magnet and the central magnet are separate structures, or the magnet and the central magnet are integrally formed.

[0016] In one embodiment, the support is a magnetic conductor, and the magnetic conductor and the central washer are integrally formed into a single structure.

[0017] In one embodiment, the conductive plate further includes an external mounting portion, the connecting portion and the wiring portion are connected through the external mounting portion, and the external mounting portion is fixed to the inner top surface of the groove.

[0018] In one embodiment, the number of connecting parts is one, and the inner mounting part, connecting part and outer mounting part form a U-shaped structure.

[0019] In one embodiment, there are two connecting parts and two inner mounting parts, and the connecting parts and the inner mounting parts are connected in a one-to-one correspondence. The outer mounting part, together with the two connecting parts and the two inner mounting parts, forms an open ring frame structure.

[0020] The beneficial effects of this utility model are as follows: The sound-generating unit has a novel structure. Without significantly reducing the volume of the central magnet, the centering support plate no longer encroaches on the space for the side magnetic structure, allowing the total volume of the side magnetic structure to be set larger, thereby increasing the magnetic field strength of the magnetic circuit assembly, improving the BL value of the sound-generating unit, and thus enhancing the acoustic performance of the sound-generating unit; the conductive plate has a wiring section, which can facilitate the electrical connection between the sound-generating unit and the external power supply. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the sound-generating unit in Embodiment 1 of this utility model. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the overall structure of the sound-generating unit in Embodiment 1 of this utility model. Figure 2 ;

[0024] Figure 3 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0025] Figure 4 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1 of this utility model. Figure 1 ;

[0027] Figure 6 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1 of this utility model. Figure 2 .

[0028] Explanation of icon numbers:

[0029] 1. Pot stand;

[0030] 2. Magnetic circuit assembly; 21. Yoke; 211. Groove; 212. Wiring trough; 22. Central magnetic structure; 221. Central magnet; 2211. Perforation; 222. Central washer; 2221. Openwork window; 23. Side magnetic structure; 24. Support part;

[0031] 3. Conductive plate; 31. Inner mounting part; 311. Inner pad; 32. Connecting part; 33. Tracing part; 331. Outer pad; 34. Outer mounting part;

[0032] 4. Centering support; 41. Internal fixing part; 411. Exposed solder pad; 42. Deformation part; 43. External fixing part;

[0033] 51. Diaphragm assembly; 511. Inner surround; 512. Outer surround; 513. Window; 52. Voice coil. Detailed Implementation

[0034] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0037] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0038] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0039] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0040] Example 1

[0041] Please refer to Figures 1 to 6The first embodiment of this utility model is: a sound generating unit, including a frame 1, a magnetic circuit assembly 2, a conductive plate 3, a centering support plate 4 and a vibration assembly. The vibration assembly includes a diaphragm assembly 51 and a voice coil 52 connected together. The outer edge of the diaphragm assembly 51 is fixedly connected to the frame 1. The diaphragm assembly 51 has an inner folding ring 511 and an outer folding ring 512 facing opposite directions.

[0042] The magnetic circuit assembly 2 includes a support 24, a yoke 21, and a central magnetic structure 22 and a side magnetic structure 23 respectively disposed on the yoke 21. The side magnetic structure 23 is arranged around the central magnetic structure 22, and a magnetic gap is formed between the central magnetic structure 22 and the side magnetic structure 23 for the voice coil 52 to move. The central magnetic structure 22 includes a central magnet 221 and a central washer 222. The central washer 222 is located above the central magnet 221. The central magnet 221 connects the central washer 222 and the yoke 21. The bottom surface of the yoke 21 is provided with a communicating groove 21. 1. A wiring groove 212 is connected to the peripheral wall of the yoke 21. The central washer 222 is provided with a hollow window 2221. The central magnet 221 is provided with a through hole 2211 connecting the hollow window 2221 and the groove 211. Specifically, the yoke 21 has two through holes of the groove 211 and the through hole 2211. The support part 24 is located at the hollow window 2221 and connected to the central magnet 221. The bottom surface of the support part 24 is connected to the top surface of the central magnet 221. The top surface of the support part 24 is set higher than the top surface of the central washer 222.

[0043] The conductive plate 3 can be a flexible circuit board, etc. The conductive plate 3 includes an inner mounting part 31, a connecting part 32 and a wiring part 33 connected in sequence. The inner mounting part 31 is fixed on the top surface of the support part 24. The inner mounting part 31 is provided with an inner pad 311. The connecting part 32 passes through the through hole 2211 and the via hole. The wiring part 33 is housed in the wiring groove 212. The end of the wiring part 33 away from the connecting part 32 is provided with an outer pad 331 that is in communication with the inner pad 311.

[0044] The centering support 4 includes an inner fixing part 41, a deformation part 42 and an outer fixing part 43 connected in sequence. The inner fixing part 41 is fixed on the inner mounting part 31. The deformation part 42 and the outer fixing part 43 are both provided corresponding to the hollow window 2221. The hollow window 2221 can avoid the deformation part 42 and the outer fixing part 43.

[0045] The central region of the diaphragm assembly 51 is fixed to the inner fixing part 41, and the outer fixing part 43 is fixed to the diaphragm assembly 51;

[0046] The centering support 4 connects the inner pad 311 and the voice coil 52, meaning that an external power source can supply power to the voice coil 52 through the outer pad 331.

[0047] To maximize the overall volume of the edge magnetic structure 23 and improve the performance of the sound-generating unit, preferably, the edge magnetic structure 23 is in the form of a continuous ring frame, or the edge magnetic structure 23 is a ring frame structure formed by multiple small magnetic structures.

[0048] To reduce the material consumption in the production of the diaphragm assembly 51 and thus lower its manufacturing cost, optionally, the diaphragm assembly 51 has a window 513 in its central region, and the edge of the window 513 is fixed to the inner fixing part 41. To allow the sound-generating unit to conduct through both the front and back, in this embodiment, the inner fixing part 41 has an exposed solder pad 411, which is connected to the voice coil 52 and is exposed through the window 513.

[0049] In this embodiment, the support portion 24 is an insulating structural component, which is bonded and fixed to the central magnet 221. In other embodiments, the support portion 24 is a magnet, which is either a separate structure from the central magnet 221, or a single integrated structure formed by integral processing of the magnet and the central magnet 221. This can improve the magnetic field strength of the magnetic circuit assembly 2, thereby enhancing the performance of the sound-generating unit. In some other embodiments, the support portion 24 is a magnetic conductor, which is also acceptable as it is a single integrated structure formed by integral processing of the magnetic conductor and the central washer 222. This can improve the magnetic conductivity of the magnetic circuit assembly 2, thereby improving the magnetic field of the sound-generating unit and enhancing its performance.

[0050] Optionally, the conductive plate 3 further includes an external mounting part 34, through which the connecting part 32 and the wiring part 33 are connected. The external mounting part 34 is fixed to the inner top surface of the groove 211, which can improve the stability of the connection between the conductive plate 3 and the magnetic circuit assembly 2.

[0051] In this embodiment, there are two connecting portions 32 and two inner mounting portions 31, and the connecting portions 32 and the inner mounting portions 31 are connected in a one-to-one correspondence. The outer mounting portion 34, together with the two connecting portions 32 and the two inner mounting portions 31, forms an open ring frame structure. In other embodiments, there is one connecting portion 32, and the inner mounting portion 31, the connecting portion 32, and the outer mounting portion 34 form a U-shaped structure.

[0052] To prevent the weld between the outer fixing part 43 and the voice coil 52 from colliding with the central magnet 221, optionally, the top surface of the central magnet 221 has a relief groove corresponding to the outer fixing part 43, the relief groove is connected to the hollow window 2221, and the relief groove is a blind groove or a through groove.

[0053] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings under the utility model concept, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound emitting unit, characterized by: The application relates to a magnetic circuit assembly, a conductive plate, a centering sheet, a vibrating assembly and a loudspeaker. The magnetic circuit assembly comprises a support part, a yoke and a center magnetic structure and an edge magnetic structure arranged on the yoke respectively, the edge magnetic structure surrounds the center magnetic structure, the center magnetic structure comprises a center magnetic steel and a center dust shield, the center magnetic steel is connected with the center dust shield and the yoke, the bottom surface of the yoke is provided with a groove and a wiring groove which are connected, the center dust shield is provided with a hollow window, the center magnetic steel is provided with a through hole which is connected with the hollow window and the groove, the support part is located in the hollow window and is connected with the center magnetic steel, and the top surface of the support part is higher than the top surface of the center dust shield. The conductive plate comprises an inner mounting part, a connecting part and a wiring part which are sequentially connected, the inner mounting part is fixed on the top surface of the support part, the inner mounting part is provided with an inner soldering pad, the connecting part is arranged in the through hole, the wiring part is arranged in the wiring groove, and the end of the wiring part away from the connecting part is provided with an outer soldering pad which is connected with the inner soldering pad. The centering sheet comprises an inner fixing part, a deformation part and an outer fixing part which are sequentially connected, the inner fixing part is fixed on the inner mounting part, and the deformation part and the outer fixing part are arranged corresponding to the hollow window. The vibrating assembly comprises a vibrating diaphragm assembly and a voice coil which are connected, the central region of the vibrating diaphragm assembly is fixed on the inner fixing part, and the outer fixing part is fixed on the vibrating diaphragm assembly. The inner soldering pad of the centering sheet is connected with the voice coil.

2. The sound producing unit of claim 1, wherein: The central region of the vibrating diaphragm assembly is provided with a window, and the edge of the window is fixed on the inner fixing part.

3. The sound producing unit of claim 2, wherein: The inner fixing part is provided with an exposed soldering pad which is connected with the voice coil and is exposed through the window.

4. The sound producing unit of claim 1, wherein: The top surface of the center magnetic steel is provided with a avoiding groove corresponding to the outer fixing part, the avoiding groove is connected with the hollow window, and the avoiding groove is a blind groove or a through groove.

5. The sound producing unit of claim 1, wherein: The support part is an insulating structural member.

6. The sound producing unit of claim 1, wherein: The support part is a magnet, and the magnet and the center magnetic steel are in a separate structure or are in an integrated structure which are integrally processed and formed.

7. The sound producing unit of claim 1, wherein: The support part is a magnetic conductive member, and the magnetic conductive member and the center dust shield are in an integrated structure which are integrally processed and formed.

8. The sound producing unit of claim 1, wherein: The conductive plate further comprises an outer mounting part, the connecting part and the wiring part are connected through the outer mounting part, and the outer mounting part is fixed on the inner top surface of the groove.

9. The sound producing unit of claim 8, wherein: The number of the connecting part is one, and the inner mounting part, the connecting part and the outer mounting part form a Chinese character 'fang' type structure.

10. The sound producing unit of claim 8, wherein: The number of the connecting part and the inner mounting part is two respectively, the connecting part and the inner mounting part are connected one by one, and the outer mounting part, the two connecting parts and the two inner mounting parts form a ring frame structure with an opening.

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