Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a voice coil, a vibrating diaphragm assembly, a centering disk and a magnetic circuit assembly, and is characterized in that the vibrating diaphragm assembly is connected with the voice coil; the centring disk is fixedly connected with the voice coil, the centring disk comprises an inner fixing part, a cantilever part, a lifting part and an outer fixing part which are connected in sequence, a first bonding pad and a second bonding pad which are electrically connected are arranged on the centring disk, the first bonding pad is arranged on the inner fixing part, the second bonding pad is arranged on the outer fixing part, the outer fixing part is fixed on the vibrating diaphragm assembly, and the lifting part is fixed on the vibrating diaphragm assembly. 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, a first avoiding groove used for avoiding the cantilever part is formed in the bottom of the central magnetic structure, and the central washer is provided with a mounting part used for being fixedly connected with the inner fixing part; the yoke has a through hole disposed corresponding to the first 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] Diaphragm assembly, the diaphragm assembly being connected to the voice coil;

[0008] A centering support is fixedly connected to the voice coil. The centering support includes an inner fixing part, a cantilever part, a lifting 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 provided on the inner fixing part, and the second solder pad is provided on the outer fixing part. The outer fixing part is fixed on the diaphragm assembly, and the second solder pad is in communication with the voice coil.

[0009] 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.

[0010] 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.

[0011] In one embodiment, a portion of the second clearance groove is located below the voice coil.

[0012] 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.

[0013] In one embodiment, the upper clearance groove connects to the top surface of the central washer.

[0014] In one embodiment, the first clearance groove connects the opposite sides of the central magnetic structure, and the number of the centering support plates is one or more.

[0015] In one embodiment, the voice coil is fixedly connected to at least a portion of the lifting portion.

[0016] In one embodiment, the end of the cantilever portion away from the inner fixing portion is located below the voice coil and is fixedly connected to the bottom surface of the voice coil.

[0017] In one embodiment, the magnetic circuit assembly further includes a side magnetic structure, the top surface of which has a clearance groove corresponding to the second pad.

[0018] In one embodiment, the magnetic circuit assembly further includes a side magnetic structure, the lifting portion being located outside the voice coil, and the side magnetic structure having a clearance notch for avoiding the lifting portion.

[0019] 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

[0020] 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.

[0021] Figure 1 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

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

[0023] Figure 3 A cross-sectional view of the sound-generating unit of Embodiment 1 of this utility model. Figure 2 ;

[0024] Figure 4 This is a schematic diagram of a portion of the sound-generating unit in Embodiment 1 of this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Pot stand;

[0027] 2. Voice coil;

[0028] 3. Diaphragm assembly;

[0029] 4. Centering support; 41. Internal fixing part; 42. Cantilever part; 43. Lifting part; 44. External fixing part; 45. First solder pad; 46. Second solder pad;

[0030] 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; 524. First clearance groove; 5241. Lower clearance groove; 5242. Upper clearance groove; 53. Side magnetic structure; 531. Clearance groove; 532. Clearance notch;

[0031] 6. Skeleton. 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 centering support 4, and a magnetic circuit assembly 5. The magnetic circuit assembly 5 is connected to the frame 1, and the diaphragm assembly 3 is connected to the voice coil 2 and the frame 1. The centering support 4 is fixedly connected to the voice coil 2. The centering support 4 includes an inner fixing part 41, a cantilever part 42, a lifting part 43, and an outer fixing part 44 connected in sequence. The centering support 4 is provided with a first solder pad 45 and a second solder pad 46 electrically connected. The first solder pad 45 is provided on the inner fixing part 41, and the second solder pad 46 is provided on the outer fixing part 44. The outer fixing part 44 is fixed to the diaphragm assembly 3. The second solder pad 46 is connected to the voice coil 2. Voice coil 2 is turned on; the magnetic circuit assembly 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 the side magnetic structure 53 and the central magnetic structure 52 for the voice coil 2 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 45.

[0040] 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 2 and improve the performance of the sound unit.

[0041] 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 45 for conduction, while the other end of the external electrical connector is connected to an external power source.

[0042] Optionally, the sound-generating unit also includes a frame 6, which is connected to the diaphragm assembly 3 and the voice coil 2 respectively. The external fixing part 44 is fixed on the frame 6, that is, the external fixing part 44 is indirectly connected to the diaphragm assembly 3.

[0043] 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 2. The second clearance groove 512 not only avoids the cantilever portion 42 but also avoids the voice coil 2, thereby preventing the cantilever portion 42 and / or the voice coil 2 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.

[0044] 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.

[0045] 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 44, which are arranged far apart from each other. In one or more embodiments, there may be two or more centering support plates 4.

[0046] The upper central magnet 523 has a convex cross-section, and the central region of the diaphragm assembly 3 is connected to the upper central magnet 523. In this embodiment, the lower central magnet 521 includes a connected lower magnet and an upper magnet, with the lower magnet located below the upper magnet. The lower magnet and the upper magnet can be either an integrally formed structure or separate structures bonded together.

[0047] To improve the stability of the connection between the centering support 4 and the voice coil 2, at least a portion of the lifting portion 43 is fixedly connected to the voice coil 2. In this embodiment, the end of the cantilever portion 42 away from the inner fixing portion 41 is located below the voice coil 2. Preferably, the end of the cantilever portion 42 away from the inner fixing portion 41 is fixedly connected to the bottom surface of the voice coil 2.

[0048] Optionally, the top surface of the edge magnetic structure 53 has a clearance groove 531 corresponding to the second pad 46, the clearance groove 531 being used to avoid the welding point between the lead of the voice coil 2 and the second pad 46.

[0049] In one or more embodiments, the lifting portion 43 is located outside the voice coil 2, and the side magnet structure 53 has a clearance notch 532 for avoiding the lifting portion 43, so as to prevent the side magnet structure 53 from scratching the lifting portion 43.

[0050] 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 diaphragm assembly connected to the voice coil; a centering spider fixedly connected to the voice coil, the centering spider comprising an inner fixed portion, a cantilever portion, a lifting portion and an outer fixed portion connected in sequence, the centering spider being provided with a first pad and a second pad electrically connected, the first pad being provided on the inner fixed portion, the second pad being provided on the outer fixed portion, the outer fixed portion being fixed on the diaphragm assembly, the second pad being in conduction with the voice coil; a magnetic circuit assembly comprising a yoke and a center magnetic structure provided on the yoke, the center magnetic structure comprising a lower center magnetic steel, a center dust cup and an upper center magnetic steel stacked in sequence from bottom to top, the bottom of the center magnetic structure being provided with a first avoiding slot for avoiding the cantilever portion, the center dust cup having a mounting portion for fixedly connecting with the inner fixed portion, the yoke having a through hole corresponding to the first pad.

2. The sound producing unit of claim 1, wherein: The top surface of the yoke has a second avoiding slot corresponding to the first avoiding slot, and the second avoiding slot is in communication 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 provided on the lower center magnetic steel and an upper avoiding slot provided on the bottom of the center dust cup, and the lower avoiding slot and the upper avoiding slot are in communication to form the first avoiding slot.

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

6. The sound producing unit of claim 1, wherein: The first avoiding slot is in communication with opposite sides of the center magnetic structure, and the number of the centering spiders is one or more.

7. The sound producing unit of claim 1, wherein: At least part of the lifting portion is fixedly connected to the voice coil.

8. The sound producing unit of claim 1, wherein: The end of the cantilever portion away from the inner fixed portion is located below the voice coil and is fixedly connected to the bottom surface of the voice coil.

9. The sound producing unit of claim 1, wherein: The magnetic circuit assembly further comprises a side magnetic structure, and the top surface of the side magnetic structure has an avoiding slot corresponding to the second pad.

10. The sound producing unit of claim 1, wherein: The magnetic circuit assembly further comprises a side magnetic structure, and the lifting portion is located outside the voice coil, and the side magnetic structure has an avoiding gap for avoiding the lifting portion.

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