Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a diaphragm assembly, a magnetic circuit assembly and a centering disk, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure is in an annular frame shape as a whole, the yoke is provided with a plurality of bosses, and the bosses are located in a hollow area of the central magnetic structure; the centering disk comprises a bonding pad part, the two sides of the bonding pad part are connected with rising parts respectively, the rising parts are connected with deformation parts, the deformation parts are connected with outer fixing parts, the outer fixing parts are fixedly connected with the boss, the outer fixing parts are provided with first bonding pads, and the first bonding pads are fixedly connected with the boss. The pad part is provided with a second pad conducted with the first pad, the pad part is fixedly connected with the diaphragm assembly, and the deformation part and the rising part are arranged corresponding to the hollow area of the central magnetic structure. The sound production unit is novel in structure, large in magnetic field intensity and capable of achieving 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 products, such as mobile phones, handheld game consoles, navigation devices, or other handheld multimedia entertainment devices, are widely used in people's daily lives. Among these mobile electronic devices, the voice playback device is an essential component. The quality of the voice directly affects the user experience when using these mobile electronic devices. Therefore, the requirements for the sound unit installed in electronic devices are becoming increasingly higher.

[0003] In related technologies, the sound unit usually adopts a centering support structure. By placing the centering support at the four corners of the sound unit or on the short axis of the sound unit, this occupies the space of the magnetic circuit system outside the voice coil, which limits the size of the side magnets of the magnetic circuit system and prevents them from being enlarged. This reduces the magnetic field strength of the magnetic circuit system, lowers the BL value, and affects 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] Diaphragm assembly;

[0007] A magnetic circuit assembly, comprising a yoke and a central magnetic structure disposed on the yoke, wherein the central magnetic structure is generally in the shape of a ring frame, and the yoke is provided with a plurality of protrusions, the protrusions being located in the hollow region of the central magnetic structure;

[0008] The centering support includes a pad portion, with rising portions connected to both sides of the pad portion. The rising portions are connected to deformation portions, and the deformation portions are connected to an external fixing portion. The external fixing portion is fixedly connected to the boss. The external fixing portion has a first pad, and the pad portion has a second pad that is conductive to the first pad. The pad portion is fixedly connected to the diaphragm assembly. Both the deformation portion and the rising portion are provided corresponding to the hollow region of the central magnetic structure.

[0009] In one embodiment, the diaphragm assembly includes a connected diaphragm and a dome, the dome having two sets of support arms arranged opposite to each other, the centering support further including an inner fixing part, the deformable part being connected to the rising part through the inner fixing part, and the bottom end of the support arm being connected to the inner fixing part.

[0010] In one embodiment, the rising portion is fixedly connected to the support arm.

[0011] In one embodiment, the support arm is provided with reinforcing ribs.

[0012] In one embodiment, the dome is provided with a perforated window, the top end of the support arm is connected to the edge of the perforated window, and the sound-generating unit further includes a cover plate, which is connected to the dome and closes the perforated window.

[0013] In one embodiment, the pad portion is disposed corresponding to the central region of the diaphragm assembly.

[0014] In one embodiment, the system further includes a voice coil, which includes a connected body and a lead wire. Both the body and the lead wire are fixedly connected to the diaphragm assembly. The lead wire is soldered to the second pad for conduction. The top surface of the central magnetic structure is provided with a clearance groove for avoiding the lead wire.

[0015] In one embodiment, the diaphragm assembly has a hollow clearance bulge corresponding to the connection between the body and the lead wire.

[0016] In one embodiment, the centering support is a centrally symmetric structure or a planar symmetric structure.

[0017] In one embodiment, the magnetic circuit assembly further includes a side magnetic structure, which is ring-shaped and arranged around the central magnetic structure.

[0018] The beneficial effects of this invention are as follows: The novel structure of this sound-generating unit places the centering support plate in the hollow center of the magnetic structure, effectively avoiding the centering support plate occupying the space outside the voice coil used for the side magnetic structure. This allows for a larger overall volume of the side magnetic structure, thereby improving the performance of the sound-generating unit. Furthermore, the central region of the central magnetic structure has low magnetic utilization; hollowing out the central region minimizes the impact on the magnetic field strength of the central magnetic structure. The solder pads correspond to the central region of the diaphragm assembly and are located away from the four ends, avoiding the problem of wire breakage caused by voice coil polarization pulling on the leads on the solder pads. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0021] Figure 2 A cross-sectional view of the sound-generating unit of Embodiment 1 of this utility model. Figure 1 ;

[0022] Figure 3 A cross-sectional view of the sound-generating unit of Embodiment 1 of this utility model. Figure 2 ;

[0023] Figure 4 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 1 of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Voice coil; 21. Body; 22. Lead wire;

[0027] 3. Diaphragm assembly; 31. Diaphragm; 32. Dome; 321. Support arm; 322. Perforated window; 323. Avoidance bulge;

[0028] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 421. Central magnet; 422. Central washer; 423. Clearance groove; 43. Side magnetic structure; 44. Boss;

[0029] 5. Centering support; 51. Solder pad section; 52. Lifting section; 53. Internal fixing section; 54. Deformation section; 55. External fixing section;

[0030] 6. Conductive components;

[0031] 7. Cover plate. Detailed Implementation

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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.

[0038] Example 1

[0039] Please refer to Figures 1 to 4The first embodiment of this utility model is as follows: a sound-generating unit, including a frame 1, a voice coil 2, a diaphragm assembly 3, a magnetic circuit assembly 4, and a centering support 5. The magnetic circuit assembly 4 and the diaphragm assembly 3 are respectively connected to the frame 1. The voice coil 2 includes a connected body 21 and a lead wire 22. Both the body 21 and the lead wire 22 are fixedly connected to the diaphragm assembly 3. The magnetic circuit assembly 4 includes a yoke 41 and a central magnetic structure 42 and a side magnetic structure 43 respectively disposed on the yoke 41. The side magnetic structure 43 is in the shape of a ring and surrounds the central magnetic structure 42. A magnetic gap is formed between the central magnetic structure 42 and the side magnetic structure 43 for the voice coil 2 to move. The central magnetic structure 42 is generally in the shape of a ring. The yoke 41 is provided with multiple bosses 44, which are located in the hollow area of ​​the central magnetic structure 42. The centering support 5 includes a pad portion 51, with rising portions 52 connected to both sides of the pad portion 51. The rising portions 52 are connected to a deformation portion 54, and the deformation portion 54 is connected to an external fixing portion 55. The external fixing portion 55 is fixedly connected to the boss 44. The external fixing portion 55 is provided with a first pad, which is used to conduct electricity to an external power source. The pad portion 51 is provided with a second pad that conducts electricity to the first pad. The lead wire 22 is soldered to the second pad for conduction. The pad portion 51 is fixedly connected to the diaphragm assembly 3. Preferably, the pad portion 51 is set to the central region of the diaphragm assembly 3. The deformation portion 54 and the rising portion 52 are both set to the hollow region of the central magnetic structure 42. Optionally, the pad portion 51 is also set to the hollow region of the central magnetic structure 42.

[0040] Optionally, a conductive element 6 is embedded in the boss 44. The first pad is welded to one end of the conductive element 6 for electrical connection, and the other end of the conductive element 6 is exposed on the bottom surface of the yoke 41. In this case, the boss 44 is an insulator mounted on the yoke 41. Of course, it is also possible for the external fixing part 55 to pass through the boss 44, thereby exposing the first pad on the bottom surface of the yoke 41.

[0041] The diaphragm assembly 3 includes a connected diaphragm 31 and a dome 32. The dome 32 has two sets of support arms 321 arranged opposite to each other. The pad portion 51 is located between the two sets of support arms 321 and is fixedly connected to the dome 32. The centering support plate 5 also includes an inner fixing portion 53. The deformable portion 54 is connected to the rising portion 52 through the inner fixing portion 53. The bottom end of the support arm 321 is connected to the inner fixing portion 53. This not only enhances the stability of the connection between the centering support plate 5 and the diaphragm assembly 3, but also allows the centering support plate 5 to better support the diaphragm assembly 3.

[0042] The rising part 52 is fixedly connected to the support arm 321, for example, by adhesive bonding. The fixed connection between the rising part 52 and the support arm 321 can greatly improve the stability of the connection between the centering support plate 5 and the diaphragm assembly 3.

[0043] Optionally, the support arm 321 is provided with reinforcing ribs. The presence of the reinforcing ribs can improve the structural strength of the support arm 321 and reduce the risk of deformation. The reinforcing ribs can be stamped structures formed by stamping.

[0044] In this embodiment, the dome 32 is provided with a perforated window 322, and the top end of the support arm 321 is connected to the edge of the perforated window 322. The sound-generating unit also includes a cover plate 7, which is connected to the dome 32 and closes the perforated window 322. During the processing of the dome 32, the support arm 321 can be formed by bending a portion of the material that needs to be removed due to the perforated window 322. The perforated window 322 can reduce the overall weight of the diaphragm assembly 3 and improve the sensitivity of the sound-generating unit.

[0045] To prevent the lead wire 22 from colliding with the central magnetic structure 42, the top surface of the central magnetic structure 42 is provided with a clearance groove 423 for avoiding the lead wire 22. In this embodiment, the central magnetic structure 42 includes a central magnet 421 and a central washer 422. The central magnet 421 and the central washer 422 are respectively rectangular frames. The top surface of the central magnet 421 is connected to the central washer 422, and the bottom surface of the central magnet 421 is connected to the yoke 41. The clearance groove 423 is provided on the top surface of the central washer 422.

[0046] To ensure a more stable connection between the voice coil 2 and the diaphragm assembly 3, the diaphragm assembly 3 has a hollow clearance convexity 323. This clearance convexity 323 is positioned at the connection point between the body 21 and the lead wire 22; that is, the clearance convexity 323 is used to avoid the connection point between the body 21 and the lead wire 22. In this embodiment, the clearance convexity 323 is located on the dome 32.

[0047] The centering support 5 is a centrally symmetrical or planar symmetrical structure, which can balance the force on the diaphragm assembly 3 and improve the acoustic performance of the sound-generating unit.

[0048] 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 loudspeaker unit. The loudspeaker unit comprises a vibrating diaphragm assembly, a magnetic circuit assembly and a centering sheet. The magnetic circuit assembly comprises a yoke and a center magnetic structure arranged on the yoke, the center magnetic structure is in the shape of a ring frame as a whole, and a plurality of bosses are arranged on the yoke and located in the hollow region of the center magnetic structure. The centering sheet comprises a pad part, two upstanding parts connected to the two sides of the pad part respectively, a deformation part connected to the upstanding parts, an outer fixed part connected to the deformation part, and a first pad arranged on the outer fixed part.

2. The sound producing unit of claim 1, wherein: The vibrating diaphragm assembly comprises a sound diaphragm and a dome connected to each other.

3. The sound producing unit of claim 2, wherein: The dome has two groups of support arms arranged oppositely.

4. The sound producing unit of claim 2, wherein: The centering sheet further comprises an inner fixed part.

5. The sound producing unit of claim 2, wherein: The deformation part and the upstanding part are connected through the inner fixed part.

6. The sound producing unit of claim 1, wherein: The upstanding part is fixedly connected to the support arm.

7. The sound producing unit of claim 1, wherein: The support arm is provided with a reinforcing rib.

8. The sound producing unit of claim 7, wherein: The dome is provided with a hollow window.

9. The sound producing unit of claim 1, wherein: The top end of the support arm is connected to the edge of the hollow window.

10. The sound producing unit of claim 1, wherein: The loudspeaker unit further comprises a cover plate connected to the dome and sealing the hollow window. The pad part is arranged corresponding to the central region of the vibrating diaphragm assembly. The loudspeaker unit further comprises a voice coil. The voice coil comprises a body and a lead wire connected to each other. The body and the lead wire are fixedly connected to the vibrating diaphragm assembly. The lead wire is welded to the second pad. The top surface of the center magnetic structure is provided with a relief groove for avoiding the lead wire. The vibrating diaphragm assembly has a hollow relief bump. The relief bump is arranged corresponding to the connection between the body and the lead wire. The centering sheet is in a central symmetry structure or a plane symmetry structure. The magnetic circuit assembly further comprises a side magnetic structure. The side magnetic structure is in the shape of a ring frame and surrounds the center magnetic structure.

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