Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a vibrating diaphragm assembly and a magnetic circuit assembly, the vibrating diaphragm assembly comprises a central part, and the bottom surface of the central part is provided with a plurality of bulges; the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the central magnetic structure is located below the central part. The sounding unit is novel in structure, and during a diving test, when the central part of the vibrating diaphragm assembly is extruded by water pressure to be attached to the central magnetic structure, only the lower end face of the bulge is in contact with the top surface of the central magnetic structure, and other positions of the central part are in a suspended state, so that no negative pressure is formed to generate adsorption force between the central part and the central magnetic structure; the problem that the sounding unit loses efficacy due to the fact that the central part of the vibrating diaphragm assembly is attracted to the central magnetic structure and cannot rebound is effectively avoided. The sound production unit can be obtained by transforming an existing sound production unit, and has the advantage of being easy to popularize and apply.

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] A sound-generating unit is an acoustic product that converts electrical signals into sound signals. Currently, many electronic products have high waterproof requirements, such as smartwatches and wristbands, which necessitates conducting diving tests on the sound-generating unit.

[0003] During the underwater test, the central part of the diaphragm assembly is squeezed by the water pressure and adheres to the central magnetic structure. At the same time, the air inside the sound unit is expelled. After the air is expelled, the planar central part is subjected to negative pressure, forming a suction cup effect that tightly adheres to the central magnetic structure. After the sound unit is removed from the water, the water pressure disappears, but due to the existence of the suction cup effect, the central part of the diaphragm assembly cannot rebound, which will cause the sound unit to fail. Utility Model Content

[0004] The purpose of this invention is to provide a sound-generating unit that solves the technical problem that the central part of the diaphragm assembly is easily attracted to the central magnetic structure, causing the sound-generating unit to fail.

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

[0006] A diaphragm assembly, the diaphragm assembly including a central portion, the bottom surface of the central portion having a plurality of protrusions;

[0007] A magnetic circuit assembly, comprising a yoke and a central magnetic structure disposed on the yoke, the central magnetic structure being located below the central portion.

[0008] In one embodiment, the number of protrusions is one, and the protrusion is arranged in a strip shape along the central axis of the length direction of the central portion; or, the protrusion is arranged in a strip shape along the central axis of the width direction of the central portion; or, the protrusion is arranged corresponding to the central region of the central portion.

[0009] In one embodiment, the number of protrusions is multiple.

[0010] In one embodiment, the number of protrusions is even, and the even number of protrusions are divided into two symmetrically arranged groups.

[0011] In one embodiment, the number of protrusions is odd, with one of the protrusions corresponding to the central region of the central portion, and the remaining protrusions divided into two symmetrically arranged groups.

[0012] In one embodiment, the number of protrusions is five, with one protrusion corresponding to the central region of the central portion and the remaining four protrusions respectively located near the four corners of the central portion.

[0013] In one embodiment, the protrusion is columnar.

[0014] In one embodiment, the protrusion is cylindrical, elliptical, or prismatic.

[0015] In one embodiment, the diaphragm assembly includes a diaphragm and a dome. The diaphragm includes an inner fixing portion, a folded ring portion, and an outer fixing portion connected sequentially from the inside to the outside. The inner fixing portion is disposed along the edge of the dome and together with the dome forms the central portion. The protrusion is disposed on the dome.

[0016] In one embodiment, the top surface of the dome has a groove corresponding to the protrusion.

[0017] The beneficial effects of this invention are as follows: The sound-generating unit has a novel structure. During underwater testing, when the central part of the diaphragm assembly is pressed against the central magnetic structure by water pressure, only the protruding lower end face contacts the top surface of the central magnetic structure, while the other parts of the central part remain suspended. Therefore, negative pressure is not generated, preventing the central part from adhering to the central magnetic structure and thus avoiding the problem of the sound-generating unit failing due to the central part of the diaphragm assembly being unable to rebound. This sound-generating unit can be obtained by modifying existing sound-generating units, making it easy to promote and apply. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is an exploded view of the sound-generating unit according to Embodiment 1 of this utility model;

[0020] Figure 2 This is a cross-sectional view of the sound-generating unit according to Embodiment 1 of this utility model;

[0021] Figure 3 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1 of this utility model;

[0022] Figure 4 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 2 of this utility model;

[0023] Figure 5 This is a cross-sectional view of the sound-generating unit according to Embodiment 3 of this utility model.

[0024] Explanation of icon numbers:

[0025] 1. Pot stand;

[0026] 2. Voice coil;

[0027] 3. Diaphragm assembly; 31. Outer edge; 32. Deformation section; 33. Central section; 34. Diaphragm; 35. Dome; 351. Protrusion; 352. Groove;

[0028] 4. Magnetic circuit assembly; 41. Yoke; 42. Central magnetic structure; 421. Central magnet; 422. Central washer; 43. Side magnetic structure; 431. Side magnet; 432. Side washer. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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.

[0033] 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.

[0034] 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.

[0035] Example 1

[0036] Please refer to Figures 1 to 3 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, and a magnetic circuit assembly 4. The diaphragm assembly 3 includes an outer edge portion 31, a deformation portion 32, and a central portion 33 connected sequentially from the outside to the inside. The outer edge portion 31 is connected to the frame 1, and the central portion 33 is connected to the voice coil 2. The bottom surface of the central portion 33 is provided with a plurality of protrusions 351. 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 yoke 41 and / or the side magnetic structure 43 are connected to the frame 1. A magnetic gap is formed between the side magnetic structure 43 and the central magnetic structure 42 for the voice coil 2 to move. The central magnetic structure 42 is located below the central portion 33. When the central portion 33 is subjected to pressure toward the yoke 41, only a small area of ​​the top surface of the central magnetic structure 42 contacts the lower end face of the protrusion 351, and most of the top surface of the central magnetic structure 42 does not contact the bottom surface of the central portion 33.

[0037] In this embodiment, the diaphragm assembly 3 includes a diaphragm 34 and a dome 35. The diaphragm 34 includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The folded ring part is the aforementioned deformable part 32, and the outer fixing part is the aforementioned outer edge part 31. The inner fixing part is disposed along the edge of the dome 35 and together with the dome 35 forms the central part 33. The protrusion 351 is disposed on the dome 35. When the central part 33 is subjected to pressure toward the yoke 41, the lower end face of the protrusion 351 contacts the top surface of the central magnetic structure 42. Optionally, the protrusion 351 and the dome 35 are integrally formed structures. In other embodiments, the protrusion 351 and the dome 35 can also be separate structures. In this case, the protrusion 351 and the dome 35 are glued, welded, heat-fused, or connected by other means. The material of the protrusion 351 includes, but is not limited to, metal and plastic.

[0038] In other embodiments, the diaphragm assembly 3 may not have the dome 35, in which case the inner fixing part is the aforementioned central part 33.

[0039] The central magnetic structure 42 includes a central magnet 421 and a central washer 422 located on the top surface of the central magnet 421. The central magnet 421 connects the central washer 422 and the yoke 41 respectively. When the central part 33 is subjected to pressure toward the yoke 41, only a small part of the top surface of the central washer 422 contacts the lower end face of the protrusion 351.

[0040] The side magnetic structure 43 includes a side magnet 431 and a side washer 432. The side magnet 431 connects the side washer 432 and the side magnet 431. In a specific product, the side washer 432 and / or the side magnet 431 are connected to the basin stand 1.

[0041] Optionally, there may be multiple protrusions 351. In this case, to balance the force on the central part 33, when the number of protrusions 351 is even, the even number of protrusions 351 are arranged symmetrically. Specifically, the even number of protrusions 351 are divided into two symmetrically arranged groups. When the number of protrusions 351 is odd, one of the protrusions 351 is set in the central area of ​​the central part 33, and the remaining protrusions 351 are divided into two symmetrically arranged groups.

[0042] In this embodiment, there are five protrusions 351. One protrusion 351 is located in the central region of the central portion 33, and the remaining four protrusions 351 are located near the four corners of the central portion 33.

[0043] Optionally, the protrusion 351 is columnar, such as cylindrical, elliptical, or prismatic.

[0044] Example 2

[0045] Please refer to Figure 4 The second embodiment of this utility model is a parallel technical solution to the first embodiment, and the difference between the two is that: the number of protrusions 351 is one, and the protrusions 351 are arranged in a strip shape along the central axis of the length direction of the central portion 33; or, the protrusions 351 are arranged in a strip shape along the central axis of the width direction of the central portion 33; or, the protrusions 351 are arranged corresponding to the central area of ​​the central portion 33.

[0046] In this embodiment, the protrusion 351 is arranged in a strip shape along the central axis of the central portion 33.

[0047] Example 3

[0048] Please refer to Figure 5 The third embodiment of this utility model is a parallel technical solution to the first embodiment. The difference between the third and the first embodiment is that the top surface of the dome 35 has a groove 352 corresponding to the protrusion 351. The presence of the groove 352 can not only reduce the manufacturing materials of the dome 35 and save the manufacturing cost of the dome 35, but also make the protrusion 351 a stamping structure that can be formed by stamping, so as to facilitate the processing and manufacturing of the protrusion 351. At the same time, it enhances the rigidity of the dome 35 and improves the performance of the sound unit.

[0049] 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 A diaphragm assembly, the diaphragm assembly including a central portion, the bottom surface of the central portion having a plurality of protrusions; A magnetic circuit assembly, comprising a yoke and a central magnetic structure disposed on the yoke, the central magnetic structure being located below the central portion.

2. The sound-generating unit according to claim 1, characterized in that: The number of protrusions is one, and the protrusion is arranged in a strip shape along the central axis of the length direction of the central portion; or, the protrusion is arranged in a strip shape along the central axis of the width direction of the central portion; or, the protrusion is arranged corresponding to the central area of ​​the central portion.

3. The sound-generating unit according to claim 1, characterized in that: The number of protrusions is multiple.

4. The sound-generating unit according to claim 3, characterized in that: The number of protrusions is even, and the even number of protrusions are divided into two symmetrically arranged groups.

5. The sound-generating unit according to claim 3, characterized in that: The number of protrusions is odd, with one of the protrusions corresponding to the central region of the central part, and the remaining protrusions are divided into two symmetrically arranged groups.

6. The sound-generating unit according to claim 5, characterized in that: The number of protrusions is five, with one protrusion located in the central area of ​​the central part and the remaining four protrusions located near the four corners of the central part.

7. The sound-generating unit according to claim 1, characterized in that: The protrusion is columnar.

8. The sound-generating unit according to claim 7, characterized in that: The protrusion is cylindrical, elliptical, or prismatic.

9. The sound-generating unit according to claim 1, characterized in that: The diaphragm assembly includes a diaphragm and a dome. The diaphragm includes an inner fixing part, a folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is disposed along the edge of the dome and together with the dome forms the central part. The protrusion is disposed on the dome.

10. The sound-generating unit according to claim 9, characterized in that: The top surface of the dome has a groove corresponding to the protrusion.

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