Sound production unit

Abstract

The utility model discloses a sounding unit, including voice coil, centering disk and magnetic circuit subassembly, centering disk includes internal fixed part, cantilever part and external fixed part that connect in proper order, the centering disk is equipped with first pad and second pad that are electrically connected, the first pad is equipped on the internal fixed part, the second pad is equipped on the external fixed part, and the second pad is equipped on the external fixed part. The second bonding pad is arranged far away from the first bonding pad, the outer fixing part is fixedly connected with the voice coil, and the second bonding pad is conducted with the voice coil; the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure comprises lower central magnetic steel, a central washer and upper central magnetic steel which are sequentially stacked and connected from bottom to top, and the bottom of the central magnetic structure is provided with a first avoiding groove for avoiding the cantilever part; the center washer is provided with an installation part used for being fixedly connected with the inner fixing part, and the yoke is provided with a through hole corresponding to the first bonding pad. The sound production unit is good in acoustic 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] Sound-generating units are widely used in electronic devices such as mobile phones and headphones, primarily for making calls, playing music, and playing videos. As users' demands for their terminal electronic devices increase, so too do their performance requirements for sound-generating units.

[0003] To improve the performance of the driver unit, most existing drivers adopt a large amplitude architecture design. Some drivers include a centering support plate, which connects the voice coil to the external power supply and corrects the voice coil's roll vibration. In existing technology, the centering support plate is generally located outside the voice coil. When the driver unit adopts a large amplitude design, the centering support plate must have sufficient overhang length to avoid stress concentration and wire breakage. However, the centering support plate occupies the space of the magnet outside the voice coil, preventing further improvement in the driver unit's performance. 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] Voice coil;

[0007] A centering support includes an inner fixing part, a cantilever part, and an outer fixing part connected in sequence. The centering support is provided with a first solder pad and a second solder pad that are electrically connected. The first solder pad is located on the inner fixing part, and the second solder pad is located away from the first solder pad. The outer fixing part is fixedly connected to the voice coil, and the second solder pad is in communication with the voice coil.

[0008] A magnetic circuit assembly includes a yoke and a central magnetic structure disposed on the yoke. The central magnetic structure includes a lower central magnet, a central washer, and an upper central magnet stacked and connected sequentially from bottom to top. The bottom of the central magnetic structure is provided with a first clearance groove for avoiding the cantilever portion. The central washer has a mounting portion for fixed connection with the inner fixing portion. The yoke has a through hole corresponding to the first pad.

[0009] In one embodiment, the top surface of the yoke has a second clearance groove corresponding to the first clearance groove, and the second clearance groove is connected to the first clearance groove.

[0010] In one embodiment, a portion of the second clearance groove is located below the voice coil.

[0011] In one embodiment, the first clearance groove includes a lower clearance groove disposed on the lower central magnet and an upper clearance groove disposed at the bottom of the central washer, wherein the lower clearance groove and the upper clearance groove communicate to form the first clearance groove.

[0012] In one embodiment, the upper clearance groove connects to the top surface of the central washer.

[0013] In one embodiment, the first clearance slot connects the opposite sides of the central magnetic structure.

[0014] In one embodiment, the number of centering supports is two.

[0015] In one embodiment, the number of centering supports is one, and the number of external fixing parts is two.

[0016] In one embodiment, the cross-section of the upper central magnet is convex.

[0017] In one embodiment, the lower central magnet includes a lower magnet and an upper magnet connected together, with the lower magnet located below the upper magnet.

[0018] The beneficial effects of this utility model are as follows: The sound-generating unit has a novel structure, in which the centering support is placed inside the central magnetic structure. This eliminates the need for the centering support to occupy the outer space of the voice coil, and the outer side magnetic structure of the voice coil does not need to avoid the centering support and other structures. Therefore, the overall volume of the magnetic circuit assembly can be set to be larger, further improving the acoustic performance of the sound-generating unit. Moreover, the central area of ​​the central magnetic structure is not completely hollowed out, which helps to ensure the magnetic field strength of the central magnetic structure, thereby ensuring the performance of the sound-generating unit. In addition, the central washer has a mounting part for installing the inner fixing part of the centering support, so that the sound-generating unit does not need to set up an additional structure to fix the centering support, which facilitates the assembly and manufacturing of the sound-generating unit. 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 a portion of the sound-generating unit in Embodiment 1 of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Diaphragm assembly;

[0027] 3. Voice coil;

[0028] 4. Centering support; 41. Internal fixing part; 42. Cantilever part; 43. External fixing part; 44. First solder pad; 45. Second solder pad;

[0029] 5. Magnetic circuit assembly; 51. Yoke; 511. Through hole; 512. Second clearance groove; 52. Central magnetic structure; 521. Lower central magnet; 522. Central washer; 5221. Mounting part; 523. Upper central magnet; 5231. Lower magnet; 5232. Upper magnet; 524. First clearance groove; 5241. Lower clearance groove; 5242. Upper clearance groove; 53. Side magnetic structure;

[0030] 6. Skeleton. Detailed Implementation

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] Example 1

[0038] Please refer to Figures 1 to 4Embodiment 1 of this utility model is as follows: a sound-generating unit, including a frame 1, a diaphragm assembly 2, a voice coil 3, a centering support 4, and a magnetic circuit assembly 5. The diaphragm assembly 2 and the magnetic circuit assembly 5 are respectively connected to the frame 1. The voice coil 3 is connected to the diaphragm assembly 2. The centering support 4 includes an inner fixing part 41, a cantilever part 42, and an outer fixing part 43 connected in sequence. The centering support 4 is provided with a first solder pad 44 and a second solder pad 45 electrically connected. The first solder pad 44 is located on the inner fixing part 41, and the second solder pad 45 is located away from the first solder pad 44. The outer fixing part 43 is fixedly connected to the voice coil 3, and the second solder pad 45 is electrically connected to the voice coil 3. The magnetic circuit... Component 5 includes a yoke 51 and a central magnetic structure 52 and a side magnetic structure 53 respectively disposed on the yoke 51. The side magnetic structure 53 is disposed around the central magnetic structure 52 and forms a magnetic gap between it and the central magnetic structure 52 for the voice coil 3 to move. The central magnetic structure 52 includes a lower central magnet 521, a central washer 522 and an upper central magnet 523 stacked and connected from bottom to top. The bottom of the central magnetic structure 52 is provided with a first clearance groove 524 for avoiding the cantilever portion 42. The central washer 522 has a mounting portion 5221 for fixed connection with the inner fixing portion 41. The yoke 51 has a through hole 511 corresponding to the first pad 44.

[0039] The edge magnet structure 53 includes an edge magnet and an edge washer. The edge washer is connected to the frame 1, and the edge magnet is connected to the edge washer and the yoke 51. In a preferred embodiment, the edge magnet structure 53 is in the shape of a complete ring, which can maximize the use of the outer space of the voice coil 3 and improve the performance of the sound unit.

[0040] In practical applications, one end of an external electrical connector (such as an FPC, cable, etc.) passes through the through hole 511 and is soldered to the first pad 44 for conduction, while the other end of the external electrical connector is connected to an external power source.

[0041] Optionally, the sound-generating unit also includes a frame 6, which is connected to the diaphragm assembly 2 and the voice coil 3 respectively. That is, the voice coil 3 is indirectly connected to the diaphragm assembly 2 through the frame 6.

[0042] To prevent the cantilever portion 42 from accidentally contacting the yoke 51 during deformation, the top surface of the yoke 51 has a second clearance groove 512 corresponding to the first clearance groove 524, and the second clearance groove 512 is connected to the first clearance groove 524. Preferably, a portion of the second clearance groove 512 is located below the voice coil 3. The second clearance groove 512 not only avoids the cantilever portion 42 but also avoids the voice coil 3, thereby preventing the outer fixing portion 43 and / or the voice coil 3 from colliding with the yoke 51 when the sound-generating unit vibrates with large amplitude, which helps to improve the working stability of the sound-generating unit to a greater extent.

[0043] The first clearance groove 524 includes a lower clearance groove 5241 disposed on the lower central magnet 521 and an upper clearance groove 5242 disposed at the bottom of the central washer 522. The lower clearance groove 5241 and the upper clearance groove 5242 communicate to form the first clearance groove 524. In this embodiment, the upper clearance groove 5242 communicates with the top surface of the central washer 522, which not only facilitates the processing of the central washer 522, but also allows the cantilever portion 42 to have a sufficiently large deformation space. In other embodiments, the upper clearance groove 5242 may not communicate with the top surface of the central washer 522. In this case, the central washer 522 can exert a better magnetic conduction effect, thereby further improving the performance of the sound-generating unit.

[0044] The first clearance groove 524 connects the opposite sides of the central magnetic structure 52. In this embodiment, there is one centering support plate 4 and two external fixing parts 43, which are arranged far apart from each other. In one or more embodiments, there may be two or more centering support plates 4.

[0045] The cantilever portion 42 can be either a single cantilever structure or a multi-cantilever structure. A single cantilever structure refers to the outer fixing portion 43 and the inner fixing portion 41 being connected by a single deformable arm, while a multi-cantilever structure refers to the outer fixing portion 43 and the inner fixing portion 41 being connected by multiple deformable arms. In this embodiment, the cantilever portion 42 is a single cantilever structure, which saves more space and reduces the occupancy of the first clearance slot 524 on the central magnetic structure 52, thus helping to ensure the performance of the sound-generating unit.

[0046] The upper central magnet 523 has a convex cross-section, and the central region of the diaphragm assembly 2 is connected to the upper central magnet 523. In this embodiment, the lower central magnet 521 includes a connected lower magnet 5231 and an upper magnet 5232, with the lower magnet 5231 located below the upper magnet 5232. The lower magnet 5231 and the upper magnet 5232 can be either an integrally formed structure or separate structures bonded together.

[0047] 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 inventive concept of this utility model and the contents of this utility model specification and drawings, 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: Comprising A voice coil; A centering branch, which comprises an inner fixing part, a cantilever part and an outer fixing part connected in sequence, and is provided with a first pad and a second pad connected in electricity, the first pad is arranged on the inner fixing part, the second pad is arranged away from the first pad, the outer fixing part is fixedly connected with the voice coil, and the second pad is in conduction with the voice coil; A magnetic circuit assembly, which comprises a yoke and a center magnetic structure arranged on the yoke, the center magnetic structure comprises a lower center magnetic steel, a center dust core and an upper center magnetic steel stacked and connected in sequence from bottom to top, the bottom of the center magnetic structure is provided with a first avoiding slot for avoiding the cantilever part, the center dust core is provided with a mounting part for fixedly connecting with the inner fixing part, and the yoke is provided with a through hole corresponding to the first pad.

2. The sound producing unit of claim 1, wherein: The top surface of the yoke is provided with a second avoiding slot corresponding to the first avoiding slot, and the second avoiding slot is communicated with the first avoiding slot.

3. The sound producing unit of claim 2, wherein: Part of the second avoiding slot is located below the voice coil.

4. The sound producing unit of claim 1, wherein: The first avoiding slot comprises a lower avoiding slot arranged on the lower center magnetic steel and an upper avoiding slot arranged on the bottom of the center dust core, and the lower avoiding slot is communicated with the upper avoiding slot to form the first avoiding slot.

5. The sound producing unit of claim 4, wherein: The upper avoiding slot is communicated with the top surface of the center dust core.

6. The sound producing unit of claim 1, wherein: The first avoiding slot is communicated with opposite sides of the center magnetic structure.

7. The sound producing unit of claim 6, wherein: The number of the centering branches is two.

8. The sound producing unit of claim 6, wherein: The number of the centering branches is one, and the number of the outer fixing parts is two.

9. The sound producing unit of claim 1, wherein: The cross section of the upper center magnetic steel is in the shape of a Chinese character "。 10. The sound producing unit of claim 9, wherein: The lower center magnetic steel comprises a lower magnetic steel and an upper magnetic steel connected in sequence, and the lower magnetic steel is located below the upper magnetic steel.

Images