Sound production unit

Abstract

The utility model discloses a sounding unit, including diaphragm subassembly, centering disk and magnetic circuit subassembly, centering disk includes pad portion, pad portion both sides are connected with rising portion, rising portion is connected with deformation portion, the deformation portion is connected with external fixed portion, the external fixed portion is equipped with first pad, and the first pad is connected with the magnetic circuit subassembly. The bonding pad part is provided with a second bonding pad conducted with the first bonding pad, and the bonding pad part is fixedly connected with the vibrating diaphragm assembly and is arranged corresponding to the central area of the vibrating diaphragm assembly; the magnetic circuit assembly comprises a yoke and a center magnetic structure arranged on the yoke, two vertically-through mounting holes are formed in the center magnetic structure, the deformation part and the outer fixing part are both contained in the mounting holes, bosses fixedly connected with the yoke are arranged in the mounting holes, and the deformation part and the outer fixing part are arranged in the bosses. And the boss is fixedly connected with the outer fixing part. 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 centering support plate includes a pad portion, with rising portions connected to both sides of the pad portion, a deformation portion connected to the rising portion, and an external fixing portion connected to the deformation portion. The external fixing portion is provided with a first pad, and the pad portion is provided with a second pad that is in communication with the first pad. The pad portion is fixedly connected to the diaphragm assembly and is positioned corresponding to the central region of the diaphragm assembly.

[0008] A magnetic circuit assembly includes a yoke and a central magnetic structure disposed on the yoke. The central magnetic structure has two through mounting holes. The deformable part and the external fixing part are both received in the mounting holes. The mounting holes have bosses that are fixedly connected to the yoke, and the bosses are fixedly connected to the external fixing parts.

[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 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.

[0012] In one embodiment, the central magnetic structure includes a central magnet and a central washer, the central magnet connecting the yoke and the central washer. The sound-generating unit also includes a voice coil, the voice coil including a body and a lead wire respectively fixedly connected to the diaphragm assembly, one end of the lead wire being connected to the body, and the other end of the lead wire being soldered to the second pad. The central washer is provided with a clearance hole for avoiding the soldering point between the lead wire and the first pad.

[0013] In one embodiment, the clearance hole has a first clearance groove on each side for avoiding a portion of the pad portion, and the first clearance groove connects the mounting hole and the clearance hole.

[0014] In one embodiment, the two ends of the clearance hole each have a second 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 clearance hole connects the top and bottom surfaces of the central washer, and first subtractive material holes are provided on both sides of the clearance hole. The first subtractive material holes connect the top and bottom surfaces of the central washer, and the mounting hole and the clearance hole are respectively connected on both sides of the first subtractive material holes. The clearance hole and the two first subtractive material holes constitute a first subtractive material area on the central washer.

[0017] In one embodiment, the central magnet is provided with a second subtractive material hole, the second subtractive material hole connects the top surface and the bottom surface of the central magnet, and the two sides of the second subtractive material hole are respectively connected to two mounting holes. The second subtractive material hole and the two mounting holes constitute a second subtractive material area on the central magnet.

[0018] The beneficial effects of this invention are as follows: The sound-generating unit has a novel structure. Two mounting holes are provided on the central magnetic structure, and the two deformed parts of the centering support are respectively housed in these holes. This effectively avoids the centering support occupying the space outside the voice coil used for the side magnetic structure, allowing for a larger overall volume of the side magnetic structure and thus improving the performance of the sound-generating unit. Furthermore, compared to completely hollowing out the center of the central magnetic structure, providing two spaced mounting holes increases the overall volume of the central magnetic structure, thereby improving the magnetic field strength / magnetic utilization rate of the sound-generating unit. It also enhances the structural strength of the central magnetic structure. The solder pads correspond to the central area of ​​the diaphragm assembly, away from the four ends, thus avoiding the problem of wire breakage caused by the 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] Figure 5 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 2 of this utility model;

[0025] Figure 6 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 3 of this utility model.

[0026] Explanation of icon numbers:

[0027] 1. Pot stand;

[0028] 2. Voice coil; 21. Body; 22. Lead wire;

[0029] 3. Diaphragm assembly; 31. Diaphragm; 32. Dome; 321. Support arm; 322. Perforated window; 323. Avoidance bulge;

[0030] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 421. Central magnet; 4211. Second subtractive hole; 422. Central washer; 4221. Clearance hole; 4222. First clearance groove; 4223. Second clearance groove; 4224. First subtractive hole; 423. Mounting hole; 43. Side magnetic structure; 44. Boss;

[0031] 5. Centering support; 51. Solder pad section; 52. Lifting section; 53. Internal fixing section; 54. Deformation section; 55. External fixing section;

[0032] 6. Conductive components;

[0033] 7. Cover plate. 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 4 The 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 centering support 5, and a magnetic circuit assembly 4. 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 of which are fixedly connected to the diaphragm assembly 3. 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 has a first pad for connecting to an external power source. The pad portion 51 has a second pad that is connected to the first pad. The lead wire 22 is connected to the second pad. The pad is welded and connected, and the pad portion 51 is fixedly connected to the diaphragm assembly 3 and is disposed corresponding to the central area of ​​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 body 21 of the voice coil 2 to move; the central magnetic structure 42 is provided with two vertically penetrating mounting holes 423. The deformable part 54 and the outer fixing part 55 are both received in the mounting holes 423. The mounting holes 423 have a boss 44 fixedly connected to the yoke 41. The boss 44 is fixedly connected to the outer fixing part 55.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] The central magnetic structure 42 includes a central magnet 421 and a central washer 422. The central magnet 421 connects the yoke 41 and the central washer 422. One end of the lead wire 22 is connected to the body 21, and the other end of the lead wire 22 is soldered to the second pad. The central washer 422 is provided with a clearance hole 4221 to avoid the soldering point between the lead wire 22 and the first pad. For ease of processing, it is preferable that the clearance hole 4221 connects the top and bottom surfaces of the central washer 422. In actual products, the clearance hole 4221 can also be a blind hole.

[0048] The clearance hole 4221 has first clearance grooves 4222 on both sides for avoiding a portion of the pad portion 51. The first clearance grooves 4222 are disposed on the center washer 422 and connect the mounting hole 423 and the clearance hole 4221. In this embodiment, the pad portion 51 is cross-shaped and includes a horizontal portion and a vertical portion connected vertically. The second pad is disposed on the vertical portion, and the horizontal portion is connected to the rising portion 52. The first clearance grooves 4222 are used to avoid the horizontal portion.

[0049] The two ends of the clearance hole 4221 are respectively provided with a second clearance groove 4223 for avoiding the lead wire 22. The second clearance groove 4223 is provided on the center washer 422 and the second clearance groove 4223 connects the peripheral wall of the center washer 422 and the clearance hole 4221.

[0050] 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.

[0051] 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.

[0052] Example 2

[0053] Please refer to Figure 5 Embodiment 2 of this utility model is a parallel technical solution to Embodiment 1, differing from Embodiment 1 in that: First subtractive processing holes 4224 are respectively provided on both sides of the clearance hole 4221. The first subtractive processing holes 4224 connect the top and bottom surfaces of the central washer 422. The two sides of the first subtractive processing holes 4224 respectively connect the mounting hole 423 and the clearance hole 4221. The clearance hole 4221 and the two first subtractive processing holes 4224 constitute the first subtractive processing area on the central washer 422. In short, the existence of the first subtractive processing area is equivalent to hollowing out the central area of ​​the central washer 422, which facilitates the processing and manufacturing of the central washer 422.

[0054] Example 3

[0055] Please refer to Figure 6Embodiment 3 of this utility model is a parallel technical solution to Embodiment 1, differing from Embodiment 1 in that: a second subtractive processing hole 4211 is provided on the central magnet 421. The second subtractive processing hole 4211 connects the top and bottom surfaces of the central magnet 421, and two mounting holes 423 are respectively connected to both sides of the second subtractive processing hole 4211. The second subtractive processing hole 4211 and the two mounting holes 423 constitute the second subtractive processing area on the central magnet 421. In short, the existence of the second subtractive processing area is equivalent to hollowing out the central area of ​​the central magnet 421, which facilitates the processing and manufacturing of the central magnet 421.

[0056] 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-generating unit, characterized in that: include Diaphragm assembly; A centering support plate includes a pad portion, with rising portions connected to both sides of the pad portion, a deformation portion connected to the rising portion, and an external fixing portion connected to the deformation portion. The external fixing portion is provided with a first pad, and the pad portion is provided with a second pad that is in communication with the first pad. The pad portion is fixedly connected to the diaphragm assembly and is positioned corresponding to the central region of the diaphragm assembly. A magnetic circuit assembly includes a yoke and a central magnetic structure disposed on the yoke. The central magnetic structure has two through mounting holes. The deformable part and the external fixing part are both received in the mounting holes. The mounting holes have bosses that are fixedly connected to the yoke, and the bosses are fixedly connected to the external fixing parts.

2. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a connected diaphragm and a dome. The dome has two sets of support arms arranged opposite to each other. The centering support also includes an inner fixing part. The deformable part and the rising part are connected through the inner fixing part. The bottom end of the support arm is connected to the inner fixing part.

3. The sound-generating unit according to claim 2, characterized in that: The rising part is fixedly connected to the support arm.

4. The sound-generating unit according to claim 2, characterized in that: The dome is provided with a perforated window, the top of the support arm is connected to the edge of the perforated window, and the sound-generating unit also includes a cover plate, which is connected to the dome and closes the perforated window.

5. The sound-generating unit according to claim 1, characterized in that: The central magnetic structure includes a central magnet and a central washer. The central magnet connects the yoke and the central washer. The sound-generating unit also includes a voice coil. The voice coil includes a body and a lead wire that are fixedly connected to the diaphragm assembly. One end of the lead wire is connected to the body, and the other end of the lead wire is soldered to the second pad. The central washer is provided with a clearance hole to avoid the soldering point between the lead wire and the first pad.

6. The sound-generating unit according to claim 5, characterized in that: The clearance hole has a first clearance groove on each side for avoiding a portion of the pad portion, and the first clearance groove connects the mounting hole and the clearance hole.

7. The sound-generating unit according to claim 5, characterized in that: The two ends of the clearance hole each have a second clearance groove for avoiding the lead wire.

8. The sound-generating unit according to claim 5, characterized in that: The diaphragm assembly has a hollow clearance bulge, which is provided at the connection between the body and the lead wire.

9. The sound-generating unit according to claim 5, characterized in that: The clearance hole connects the top and bottom surfaces of the central washer. First subtractive material holes are provided on both sides of the clearance hole. The first subtractive material holes connect the top and bottom surfaces of the central washer. The two sides of the first subtractive material holes connect the mounting hole and the clearance hole respectively. The clearance hole and the two first subtractive material holes constitute the first subtractive material area on the central washer.

10. The sound-generating unit according to claim 5, characterized in that: The central magnet is provided with a second subtractive material hole, which connects the top and bottom surfaces of the central magnet. The two sides of the second subtractive material hole are respectively connected to the two mounting holes. The second subtractive material hole and the two mounting holes constitute the second subtractive material area on the central magnet.

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