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 concave table, and the concave table 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 sound production unit is novel in structure, the arrangement of the spherical top concave platform can improve the structural strength of the spherical top and enhance the rigidity of a sound production unit vibration system, and the concave platform is located in the window, so that the phenomenon that the sound production unit is easy to generate segmentation vibration at high frequency is effectively improved without changing the whole height of the sound production unit, and the sound production efficiency is improved. 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 operates at high frequencies, it is prone to generate splitting vibration, which affects the high-frequency sound quality. To address 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 an increase in the weight of the vibration system, resulting in problems such as a decrease in the mid-frequency sensitivity of the sounding unit, making the sound of the sounding unit less clear and full, affecting the sounding effect of the sounding unit, and at the same time causing an increase in the overall height of the sounding unit. 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 that bend 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 concave platform, and the concave platform is located within the window;

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

[0010] In one embodiment, the number of the concave platforms is one or more.

[0011] In one embodiment, the concave platform is a stamping structure formed by stamping.

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

[0013] In one embodiment, the outer edge of the body has a pressing edge, and the inner edge of the inner fixing portion is located within the pressing edge and is fixedly connected to the pressing edge.

[0014] 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 area of the outer edge of the dome is received in the pressing groove.

[0015] In one embodiment, the top surface of the dome is lower than or flush with the top surface of the body.

[0016] In one embodiment, a cover plate is further included, and the cover plate is disposed in the concave platform.

[0017] In one embodiment, the top surface of the cover plate is lower than or flush with the top surface of the dome.

[0018] In one embodiment, a magnetic circuit assembly is further included. The magnetic circuit assembly includes a yoke and a boss and a central magnetic structure respectively disposed on the yoke. The central magnetic structure is integrally in a ring frame shape. The boss is located in the hollow region of the central magnetic structure. A conductive member is provided on the boss. One end of the conductive member is exposed from the bottom surface of the yoke to be electrically connected to an external power supply. The inner mounting portion is fixed on the boss and is electrically connected to the conductive member. The concave platform is disposed corresponding to the hollow region of the central magnetic structure.

[0019] The beneficial effects of the present utility model are as follows: The structure of this sound generating unit is novel. The setting of the dome concave platform can improve the structural strength of the dome, enhance the rigidity of the vibration system of the sound generating unit. Moreover, the concave platform is in the window, and without changing the overall height of the sound generating unit, it effectively improves the phenomenon that the sound generating unit is prone to split vibration at high frequencies, and improves the high-frequency performance of the sound generating unit while ensuring the thinness and lightness 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, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[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 a schematic structural view of the dome in the sound generating unit according to Embodiment 2 of the present utility model;

[0024] Figure 4 is a cross-sectional view of the sound generating unit according to Embodiment 2 of the present utility model;

[0025] Figure 5 This is a cross-sectional view of the sound generating unit according to the third embodiment of the present utility model.

[0026] Explanation of the reference numerals in the attached drawings:

[0027] 1. Basin frame;

[0028] 2. Magnetic circuit assembly; 21. Yoke; 22. Boss; 23. Central magnetic structure; 24. Edge magnetic structure;

[0029] 3. Skeleton; 31. Body; 311. Pressing edge; 32. Support arm; 321. Stamped rib;

[0030] 4. Voice coil;

[0031] 5. Diaphragm; 51. Inner fixing part; 52. Folded ring part; 53. Outer fixing part;

[0032] 6. Dome; 61. Concave;

[0033] 7. Shaping support piece; 71. Inner mounting part; 72. Cantilever part; 73. Outer mounting part; 731. First plate part; 732. Lifting part; 733. Second plate part;

[0034] 8. Conductive part;

[0035] 9. Cover plate. Detailed implementation manners

[0036] 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 attached drawings.

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described with reference to the attached 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0038] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the attached drawings. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if the descriptions such as "first" and "second" are involved 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.

[0040] 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, or the solution, or the solution that satisfies both simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those skilled in the art can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0041] In this application, unless otherwise clearly specified and limited, the terms such as "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 communication inside two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0042] Embodiment 1

[0043] Please refer to Figure 1 and Figure 2 As shown in [Figure 1] and [Figure 2], Embodiment 1 of the present utility model is: a sound generating 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 provided on the boss 22. One end of the conductive member 8 is exposed outside the bottom surface of the yoke 21 to be electrically connected to an external power supply; the boss 22 and the yoke 21 can either be an integral structure formed by integral processing or a split structure fixedly connected by gluing, hot melting or other means;

[0044] The skeleton 3 includes a body 31. A window is provided in the central region of the body 31. Opposite sides of the window respectively have support arms 32 that are 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 concave platform 61, and the concave platform 61 is located within the window.

[0045] The diaphragm 5 includes an inner fixing portion 51, a surround portion 52, and an outer fixing portion 53 that are connected in sequence from inside to outside. The inner fixing portion 51 is in the shape of a ring frame and is connected to the body 31. The inner fixing portion 51 surrounds the body 31 to achieve a sealed connection with the body 31. The outer fixing portion 53 is connected to the speaker frame 1.

[0046] The shaping support piece 7 includes an inner mounting portion 71, a cantilever portion 72, and an outer mounting portion 73 that are connected in sequence. The inner mounting portion 71 is fixed on the convex platform 22 and is electrically connected to the conductive member 8. The support arm 32 is fixedly connected to the outer mounting portion 73. The voice coil 4 is electrically connected to the conductive member 8 through the shaping support piece 7.

[0047] Specifically, the outer mounting portion 73 includes a first plate portion 731, a raised portion 732, and a second plate portion 733 that are connected in sequence. The first plate portion 731 and the second plate portion 733 are respectively perpendicular to the raised portion 732. The first plate portion 731 and the second plate portion 733 are located on opposite sides of the raised portion 732. The first plate portion 731 is fixed on the body 31. The support arm 32 is fixedly connected to the second plate portion 733. The second plate portion 733 is connected to the cantilever portion 72. A first solder pad for welding the lead of the voice coil 4 is provided on the first plate portion 731. A second solder pad that is electrically conductive with the first solder pad is provided on the inner mounting portion 71. The second solder pad is electrically connected to the conductive member 8.

[0048] For the convenience of processing and manufacturing, the body 31 and the support arms 32 are of an integrally formed structure processed integrally. The skeleton 3 is made of a material with a light density, such as materials like 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 a light density, such as materials like aluminum, aluminum-magnesium alloy, magnesium-aluminum alloy, etc.

[0049] 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.

[0050] To make the overall height of the sound generating unit lower, the outer edge of the body 31 has a crimping edge 311, and the inner edge of the inner fixing portion 51 is located within the crimping edge 311 and fixedly connected to the crimping edge 311. Optionally, the inner edge of the inner fixing portion 51 is adhesively connected to the body 31. Additionally, the provision of the crimping edge 311 can enhance the rigidity of the skeleton 3 itself, thereby improving the rigidity of the vibration system of the sound generating unit.

[0051] 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 provision of the pressing groove can also improve the rigidity of the skeleton 3 itself.

[0052] At least a partial area 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 easily positioned and installed. To make the overall sound generating unit thinner and lighter, it is preferred that the top surface of the dome 6 is lower than or flush with the top surface of the body 31. In actual products, it is also acceptable that the top surface of the dome 6 is higher than the top surface of the body 31.

[0053] The pressing groove in the sound generating unit corresponds to the hollow region of the central magnetic structure 23. Correspondingly, the concave platform 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 concave platform 61 and the skeleton 3 will not collide with other components, and will not increase the overall thickness of the sound generating unit.

[0054] In this embodiment, the number of the concave platforms 61 is one. Providing one large-area concave platform 61 can effectively improve the structural strength of the dome 6, thereby enhancing the rigidity of the vibration system of the sound generating unit.

[0055] Optionally, the dome 6 is a single-layer structure or a multi-layer structure. At this time, the concave platform 61 on the dome 6 is a stamping structure formed by stamping.

[0056] Embodiment Two

[0057] Please refer to Figure 3 and Figure 4 , Embodiment Two of the present utility model is an alternative technical solution to Embodiment One. The difference from Embodiment One is that the number of the concave platforms 61 on the dome 6 is multiple.

[0058] In this embodiment, the number of the concave platforms 61 is two, and the two concave platforms 61 are spaced apart.

[0059] Embodiment Three

[0060] Please refer to Figure 5, Embodiment 3 of the present utility model is a further improvement based on Embodiment 1. The difference from Embodiment 1 is that the sound generating unit further includes a cover plate 9, and the cover plate 9 is arranged in the concave platform 61 of the dome 6. The addition of the cover plate 9 can, without increasing the thickness of the sound generating unit, improve the rigidity of the vibration system to a greater extent.

[0061] To ensure the thinness and lightness of the sound generating unit, it is preferred that the top surface of the cover plate 9 is lower than or flush with the top surface of the dome 6. In actual products, it is also possible that the top surface of the cover plate 9 protrudes from the top surface of the dome 6.

[0062] The above are only optional embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. 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 any direct / indirect application 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: Comprising A framework, the framework includes a body, a window is provided in the central region of the body, and support arms bent downward are respectively provided on opposite sides of the window; 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; A dome, the dome is provided on the body and covers the window, the dome has a concave platform, and the concave platform is located within the window; A shaping support piece, the shaping support piece includes an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence, and the support arm is fixedly connected to the outer mounting portion.

2. The sound generating unit according to claim 1, characterized in that: The number of the concave platforms is one or more.

3. The sound generating unit according to claim 1, wherein: The concave platform is a stamping structure formed by stamping.

4. The sound generating unit according to claim 1, wherein: The dome is a single-layer structure or a multi-layer structure.

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

6. 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 the outer edge of the dome is received in the pressing groove.

7. The sound generating unit according to claim 6, characterized in that: The top surface of the dome is lower than or flush with the top surface of the body.

8. The sound generating unit according to claim 1, wherein: It further includes a cover plate, and the cover plate is provided within the concave platform.

9. The sound generating unit according to claim 8, wherein: The top surface of the cover plate is lower than or flush with the top surface of the dome.

10. The sound generating unit according to claim 1, wherein: It further includes a magnetic circuit assembly, the magnetic circuit assembly includes a yoke and a convex platform and a central magnetic structure respectively provided on the yoke, the central magnetic structure is in an overall ring frame shape, the convex platform is located within the hollow region of the central magnetic structure, a conductive member is provided on the convex platform, one end of the conductive member is exposed outside the bottom surface of the yoke to be electrically connected to an external power source, the inner mounting portion is fixed on the convex platform and is electrically connected to the conductive member, and the concave platform is provided corresponding to the hollow region of the central magnetic structure.

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