Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a framework, a vibrating diaphragm, a dome and a shaping support chip, the framework comprises a body, the central area of the body is provided with a window, and the two opposite sides of the window are respectively provided with a support arm which is bent downwards; the vibrating diaphragm comprises an inner fixing part, the inner fixing part is in an annular frame shape and is connected with the body, and the inner fixing part is arranged around the body; the dome is arranged on the body and covers the window, the dome is provided with a convex hull, and the convex hull is located in the window; the shaping support sheet comprises an inner mounting part, a cantilever part and an outer mounting part which are connected in sequence, and the support arm is fixedly connected with the outer mounting part. The sounding unit is novel in structure, the arrangement of the convex hulls on the spherical top can improve the structural strength of the spherical top and enhance the rigidity of a sounding unit vibration system, and the convex hulls are located in the windows, so that the phenomenon that the sounding unit is easy to generate segmentation vibration at high frequency is effectively improved without changing the whole height of the sounding unit; and the high-frequency performance of the sounding unit is improved while the lightening and thinning of the sounding unit are ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly to a sounding unit. Background Art

[0002] Sounding units are mostly used in electronic devices such as mobile phones and earphones, and the scenarios where they are used are mostly for calls, playing music, playing videos, etc.

[0003] When the sounding unit works at high frequencies, it is easy to generate splitting vibration, which affects the high-frequency sound quality. To solve this problem, the prior art mostly increases the thickness of the dome to increase the rigidity of the vibration system. However, the increase in the dome thickness will cause the weight of the vibration system to increase, resulting in problems such as the low mid-frequency sensitivity of the sounding unit, making the sound of the sounding unit not clear and full enough, affecting the sounding effect of the sounding unit, and at the same time causing the overall height of the sounding unit to increase. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a new type of thin and light sounding unit that can improve splitting vibration at high frequencies.

[0005] To solve the above technical problem, the technical solution adopted by the utility model is: a sounding unit, comprising:

[0006] A skeleton, the skeleton includes a body, a window is provided in the central area of the body, and support arms bent downward are respectively provided on opposite sides of the window;

[0007] A diaphragm, the diaphragm includes an inner fixing portion, the inner fixing portion is in a ring frame shape and is connected to the body, and the inner fixing portion surrounds the body;

[0008] A dome, the dome is provided on the body and covers the window, the dome has a convex bump, and the convex bump is located within the window;

[0009] A shaping support piece, the shaping support piece includes an inner installation portion, a cantilever portion and an outer installation portion connected in sequence, and the support arm is fixedly connected to the outer installation portion.

[0010] In one embodiment, the number of the convex bumps is one or more.

[0011] In one embodiment, the convex bump is an extrusion structure formed by extrusion.

[0012] In one embodiment, the dome is a single-layer structure.

[0013] In one embodiment, the dome is a multi-layer structure.

[0014] In one embodiment, the dome includes an upper material layer, an inner encapsulating material layer, and a lower material layer. The top surface of the inner encapsulating material layer is connected to the upper material layer, the bottom surface of the inner encapsulating material layer is connected to the lower material layer. The lower material layer has a recess, the inner encapsulating material layer is located within the recess, and the edge of the lower material layer is connected to the upper material layer.

[0015] In one embodiment, at least one of the upper material layer, the inner encapsulating material layer, and the lower material layer is a multi-layer stacked structure; alternatively, the upper material layer, the inner encapsulating material layer, and the lower material layer are respectively single-layer structures.

[0016] In one embodiment, the outer edge of the body has a crimping edge, and the inner edge of the inner fixing portion is located within the crimping edge and is fixedly connected to the crimping edge.

[0017] In one embodiment, a pressing groove is provided in the central region of the body, the window is located at the bottom of the pressing groove, and at least a partial region of the outer edge of the dome is received in the pressing groove.

[0018] In one embodiment, the top surface of the dome is disposed lower than or flush with the top surface of the body.

[0019] The beneficial effects of the present utility model are as follows: The structure of the present sound generating unit is novel. The convex bump provided on the dome can improve the structural strength of the dome, enhance the rigidity of the vibration system of the sound generating unit. Moreover, the convex bump is located in the window, effectively improving the phenomenon of splitting vibration that is prone to occur at high frequencies in the sound generating unit without changing the overall height of the sound generating unit, while ensuring the thinness and lightness of the sound generating unit and improving the high-frequency performance of the sound generating unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

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

[0022] Figure 2 is a cross-sectional view of the sound generating unit according to Embodiment 1 of the present utility model;

[0023] Figure 3 is Figure 2 an enlarged view of Detail A in

[0024] Figure 4Structural schematic diagram of a partial structure of the sound generating unit according to the first embodiment of the present utility model;

[0025] Figure 5 Structural schematic diagram of a partial structure of the sound generating unit according to the second embodiment of the present utility model;

[0026] Figure 6 Partial cross-sectional view of the dome in the sound generating unit according to the third embodiment of the present utility model;

[0027] Figure 7 Partial cross-sectional view of the dome in the sound generating unit according to the fourth embodiment of the present utility model.

[0028] Explanation of the reference numerals in the attached drawings:

[0029] 1. Basin frame;

[0030] 2. Magnetic circuit assembly; 21. Yoke; 22. Boss; 23. Central magnetic structure; 24. Edge magnetic structure;

[0031] 3. Skeleton; 31. Body; 311. Crimping edge; 32. Support arm; 321. Stamped rib;

[0032] 4. Voice coil;

[0033] 5. Diaphragm; 51. Inner fixing part; 52. Folded ring part; 53. Outer fixing part;

[0034] 6. Dome; 61. Convex hull; 62. Upper material layer; 63. Inner wrapping material layer; 64. Lower material layer;

[0035] 7. Shaping support piece; 71. Inner installation part; 72. Cantilever part; 73. Outer installation part; 731. First plate part; 732. Lifting part; 733. Second plate part;

[0036] 8. Conductive part. Detailed implementation manners

[0037] The realization of the object, functional features and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0038] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0039] It should be noted that if there are directional indications involved in the embodiments of the present utility model, such as up, down, left, right, front, back..., then the directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0041] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of A, or the solution of B, or the solution of both A and B being satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] Please refer to Figures 1 to 4, Embodiment 1 of the present utility model is: a sounding unit, including a chassis 1, a magnetic circuit assembly 2, a skeleton 3, a voice coil 4, a diaphragm 5, a dome 6 and a shaping support piece 7. The magnetic circuit assembly 2 includes a yoke 21, and a boss 22, a central magnetic structure 23 and a side magnetic structure 24 respectively arranged on the yoke 21. The side magnetic structure 24 is connected to the chassis 1. A magnetic gap is formed between the central magnetic structure 23 and the side magnetic structure 24. The central magnetic structure 23 is integrally in a ring frame shape. The boss 22 is located in the hollow area of the central magnetic structure 23. A conductive member 8 is arranged on the boss 22. One end of the conductive member 8 is exposed on the bottom surface of the yoke 21 to be electrically connected to an external power supply; the boss 22 and the yoke 21 can be either an integrally formed integral structure or a split structure fixedly connected by gluing, hot melting or other means;

[0045] The skeleton 3 includes a body 31. A window is provided in the central area of the body 31. Opposite sides of the window respectively have support arms 32 bent downward; the voice coil 4 is connected to the body 31 and is arranged corresponding to the magnetic gap. The dome 6 is arranged on the body 31 and covers the window to close the window. The dome 6 has a convex bulge 61, and the convex bulge 61 is located in the window;

[0046] The diaphragm 5 includes an inner fixing part 51, a folding ring part 52 and an outer fixing part 53 connected in sequence from inside to outside. The inner fixing part 51 is in a ring frame shape and is connected to the body 31. The inner fixing part 51 surrounds the body 31 to achieve a sealed connection with the body 31. The outer fixing part 53 is connected to the chassis 1;

[0047] The shaping support piece 7 includes an inner mounting part 71, a cantilever part 72 and an outer mounting part 73 connected in sequence. The inner mounting part 71 is fixed on the boss 22. The support arm 32 is fixedly connected to the outer mounting part 73. The voice coil 4 is electrically connected to the conductive member 8 through the shaping support piece 7.

[0048] Specifically, the outer mounting part 73 includes a first plate part 731, a heightening part 732 and a second plate part 733 connected in sequence. The first plate part 731 and the second plate part 733 are respectively perpendicular to the heightening part 732. The first plate part 731 and the second plate part 733 are located on different sides of the heightening part 732. The first plate part 731 is fixed on the body 31. The support arm 32 is fixedly connected to the second plate part 733. The second plate part 733 is connected to the cantilever part 72. A first solder pad for welding the lead of the voice coil 4 is provided on the first plate part 731. A second solder pad electrically conducting with the first solder pad is provided on the inner mounting part 71. The second solder pad is electrically connected to the conductive member 8.

[0049] For the convenience of processing and manufacturing, the body 31 and the support arm 32 are integrally formed as an integral structure. The skeleton 3 is made of a material with low density, such as aluminum, aluminum-magnesium alloy, magnesium-aluminum alloy, etc., so as to minimize the increase in the weight of the vibration system and reduce the influence on the performance sensitivity of the sound generating unit. Similarly, the dome 6 is also made of a material with low density, such as aluminum, aluminum-magnesium alloy, magnesium-aluminum alloy, etc.

[0050] To improve the rigidity of the support arm 32 and enable the support arm 32 to play a better supporting role, optionally, the support arm 32 is provided with stamping ribs 321.

[0051] To make the overall height of the sound generating unit lower, the outer edge of the body 31 has a bead 311, and the inner edge of the inner fixing portion 51 is located within the bead 311 and is fixedly connected to the bead 311. Optionally, the inner edge of the inner fixing portion 51 is adhesively connected to the body 31. In addition, the setting of the bead 311 can enhance the rigidity of the skeleton 3 itself, thereby improving the rigidity of the vibration system of the sound generating unit.

[0052] A pressing groove is provided in the central region of the body 31, and the window is located at the bottom of the pressing groove. The setting of the pressing groove can also improve the rigidity of the skeleton 3 itself.

[0053] At least a part of the outer edge of the dome 6 is received in the pressing groove. With the assistance of the pressing groove, the dome 6 can be conveniently positioned and installed. To make the overall sound generating unit thinner and lighter, preferably, the top surface of the dome 6 is lower than or flush with the top surface of the body 31. In an actual product, it is also acceptable that the top surface of the dome 6 is higher than the top surface of the body 31.

[0054] The pressing groove in the sound generating unit corresponds to the hollow region of the central magnetic structure 23. Correspondingly, the convex bump 61 also corresponds to the hollow region of the central magnetic structure 23. When looking down at the sound generating unit, the pressing groove is located within the hollow region of the central magnetic structure 23. Therefore, during the operation of the sound generating unit, the convex bump 61 and the skeleton 3 will not collide with other components, and will not increase the overall thickness of the sound generating unit.

[0055] In this embodiment, the number of the convex bumps 61 is one. Providing one large-area convex bump 61 can effectively improve the structural strength of the dome 6, thereby enhancing the rigidity of the vibration system of the sound generating unit.

[0056] Optionally, the dome 6 is a single-layer structure. At this time, the convex bump 61 on the dome 6 can be either an extrusion structure formed by extrusion or a subtractive structure formed by peripheral material removal. The specific processing means can be selected as needed.

[0057] Embodiment Two

[0058] Please refer to Figure 5 , Embodiment 2 of the present utility model is an alternative technical solution to Embodiment 1. The difference from Embodiment 1 is that the number of convex hulls 61 is multiple.

[0059] In this embodiment, the spherical dome 6 has two convex hulls 61, and the two convex hulls 61 are spaced apart. The spherical dome 6 having multiple convex hulls 61 spaced apart reduces the overall weight of the spherical dome 6 while ensuring sufficient structural strength, thereby enabling the sound generating unit to have better performance.

[0060] Embodiment 3

[0061] Please refer to Figure 6 , Embodiment 3 of the present utility model is an alternative technical solution to Embodiment 1. The difference from Embodiment 1 is that the spherical dome 6 is a multi-layer structure.

[0062] In this embodiment, the convex hull 61 on the spherical dome 6 is an extrusion structure formed by extrusion. By extruding the edge of the spherical dome 6, the convex hull 61 is formed on the spherical dome 6.

[0063] Embodiment 4

[0064] Please refer to Figure 7 , Embodiment 4 of the present utility model is an alternative technical solution to Embodiment 3. The difference from Embodiment 3 is that the convex hull 61 on the spherical dome 6 is not formed by extrusion.

[0065] Specifically, the spherical dome 6 includes an upper material layer 62, an inner material layer 63, and a lower material layer 64. The top surface of the inner material layer 63 is connected to the upper material layer 62, the bottom surface of the inner material layer 63 is connected to the lower material layer 64. The lower material layer 64 has a recess, and the inner material layer 63 is located within the recess. The edge of the lower material layer 64 is connected to the upper material layer 62.

[0066] In this embodiment, the upper material layer 62, the inner material layer 63, and the lower material layer 64 are each a single-layer structure. In other embodiments, it is acceptable that at least one of the upper material layer 62, the inner material layer 63, and the lower material layer 64 is a multi-layer stacked structure.

[0067] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. Sound generating unit, characterized in that: including a skeleton, the skeleton including a body, a window being provided in a central region of the body, and support arms being downwardly bent on opposite sides of the window; a diaphragm, the diaphragm including an inner fixing portion, the inner fixing portion being in an annular frame shape and connecting to the body, and the inner fixing portion surrounding the body; a dome, the dome being provided on the body and covering the window, the dome having a convex bulge, and the convex bulge being located within the window; a shaping support piece, the shaping support piece including an inner mounting portion, a cantilever portion, and an outer mounting portion that are sequentially connected, and the support arm being fixedly connected to the outer mounting portion.

2. The sound generating unit according to claim 1, wherein: The number of the convex bulges is one or more.

3. The sound generating unit according to claim 1, wherein: The convex bulge is an extrusion structure formed by extrusion.

4. The sound generating unit according to claim 1, characterized in that: The dome is a single-layer structure.

5. The sounding unit according to claim 1, wherein: The dome is a multi-layer structure.

6. The sound generating unit according to claim 5, characterized in that: The dome includes an upper material layer, an inner wrapping material layer, and a lower material layer. The top surface of the inner wrapping material layer connects to the upper material layer, the bottom surface of the inner wrapping material layer connects to the lower material layer, the lower material layer has a recess, the inner wrapping material layer is located within the recess, and the edge of the lower material layer connects to the upper material layer.

7. The sound generating unit according to claim 6, wherein: At least one of the upper material layer, the inner wrapping material layer, and the lower material layer is a multi-layer stacked structure; or, the upper material layer, the inner wrapping material layer, and the lower material layer are respectively single-layer structures.

8. The sound generating unit according to claim 1, wherein: A pressing edge is provided on an outer edge of the body, and an inner edge of the inner fixing portion is located within the pressing edge and fixedly connected to the pressing edge.

9. The sound generating unit according to claim 1, wherein: A pressing groove is provided in the central region of the body, the window is located at the bottom of the pressing groove, and at least a partial region of an outer edge of the dome is received in the pressing groove.

10. The sound generating unit according to claim 9, wherein: The top surface of the dome is lower than or flush with the top surface of the body.

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