Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a framework, a vibrating diaphragm, a first dome, a second dome and a shaping support chip, and is characterized in that 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 first dome is arranged on the body and covers the window; the second dome is installed on the first dome and 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 second dome can improve the structural strength of the first dome so as to enhance the rigidity of a sounding unit vibration system, and the second dome is located in the window of the skeleton, so that the phenomenon that the sounding unit is easy to generate segmentation vibration at high frequency is effectively improved under the condition that the whole height of the sounding unit is not changed.

Description

Technical Field

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

[0002] The sounding unit is mostly used in electronic devices such as mobile phones and earphones, and the scenarios where it is 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 thickness of the dome will cause the weight of the vibration system to increase, resulting in problems such as the reduction of the 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 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 novel and thin sounding unit that can improve the 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 first dome, the first dome is provided on the body and covers the window;

[0009] A second dome, the second dome is installed on the first dome and is located within the window;

[0010] 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.

[0011] In one embodiment, the number of the second domes is one or more.

[0012] In one embodiment, the first dome and the second dome are adhesively connected.

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

[0014] In one embodiment, the second dome is a single-layer structure or a multi-layer stacked structure.

[0015] In one embodiment, the outer edge of the body has a hemming edge, and the inner edge of the inner fixing portion is located within the hemming edge and fixedly connected to the hemming edge.

[0016] 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 first dome is received in the pressing groove.

[0017] In one embodiment, the top surface of the first dome is disposed lower than or flush with the top surface of the body.

[0018] In one embodiment, it further includes a speaker frame, a magnetic circuit assembly and a voice coil. The diaphragm further includes an outer fixing portion, and the outer fixing portion is connected to the speaker frame; the magnetic circuit assembly includes a yoke and a boss, a central magnetic structure and a side magnetic structure respectively provided on the yoke. The side magnetic structure is connected to the speaker frame, a magnetic gap is formed between the central magnetic structure and the side magnetic structure, 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 at the bottom surface of the yoke, the voice coil is connected to the body and is disposed corresponding to the magnetic gap, the inner mounting portion is fixed on the boss, and the voice coil is electrically connected to the conductive member through the shaping support piece.

[0019] The beneficial effects of the present utility model are as follows: The structure of this sounding unit is novel. The setting of the second dome can improve the structural strength of the first dome, thereby enhancing the rigidity of the vibration system of the sounding unit. Moreover, the second dome is in the window of the skeleton, effectively improving the phenomenon that the sounding unit is prone to generate splitting vibration at high frequencies without changing the overall height of the sounding unit, and improving the high-frequency performance of the sounding unit while ensuring the thinness and lightness of the sounding unit. 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 also be obtained based on the structures shown in these drawings.

[0021] Figure 1 It is an exploded view of the sounding unit according to the first embodiment of the present utility model;

[0022] Figure 2 It is a cross-sectional view of the sounding unit according to the first embodiment of the present utility model;

[0023] Figure 3 For Figure 2Enlarged view of detail A;

[0024] Figure 4 Structural 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 sound generating unit according to the third embodiment of the present utility model.

[0027] Explanation of the reference numerals in the drawings:

[0028] 1. Basin frame;

[0029] 2. Magnetic circuit assembly; 21. Yoke; 22. Boss; 23. Central magnetic structure; 24. Edge magnetic structure;

[0030] 3. Skeleton; 31. Body; 311. Pressing edge; 32. Support arm; 32-1. Stamping rib;

[0031] 4. Voice coil;

[0032] 5. Diaphragm; 51. Inner fixing part; 52. Folded ring part; 53. Outer fixing part;

[0033] 61. First dome; 62. Second dome;

[0034] 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;

[0035] [[ID=3*]]8. Conductive part. Specific implementation manners

[0036] The realization of the object, functional features and advantages of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0037] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with 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.

[0038] 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 and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0039] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, then the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood 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" that appears 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 that both A and B are 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.

[0041] In this application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "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 of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Embodiment 1

[0043] Please refer to Figures 1 to 4, Embodiment 1 of the present utility model is as follows: A sounding unit, comprising a chassis 1, a magnetic circuit assembly 2, a skeleton 3, a voice coil 4, a diaphragm 5, a first dome 61 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 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 integrated structure 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 area of the body 31. Support arms 32 bent downward are respectively provided on opposite sides of the window; the voice coil 4 is connected to the body 31 and is arranged corresponding to the magnetic gap. The first dome 61 is provided on the body 31 and covers the window to close the window. The second dome 62 is installed on the first dome 61 and is located within the window. Optionally, the first dome 61 and the second dome 62 are adhesively connected;

[0045] The diaphragm 5 includes an inner fixing portion 51, a folding ring portion 52 and an outer fixing portion 53 connected in sequence from inside to outside. The inner fixing portion 51 is in a ring frame shape 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 chassis 1;

[0046] The shaping support piece 7 includes an inner mounting portion 71, a cantilever portion 72 and an outer mounting portion 73 connected in sequence. The inner mounting portion 71 is fixed on the boss 22. 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 heightening portion 732 and a second plate portion 733 connected in sequence. The first plate portion 731 and the second plate portion 733 are respectively perpendicular to the heightening portion 732. The first plate portion 731 and the second plate portion 733 are located on opposite sides of the heightening 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 electrically conducting 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 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 impact on the performance sensitivity of the sound generating unit. Similarly, the first dome 61 and the second dome 62 are also made of a material with low density, such as 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 is fixedly connected to the crimping edge 311. Optionally, the inner edge of the inner fixing portion 51 is adhesively connected to the body 31. In addition, the setting 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 setting 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 first dome 61 is received in the pressing groove. With the assistance of the pressing groove, the first dome 61 can be conveniently positioned and installed. To make the overall sound generating unit thinner and lighter, preferably, the top surface of the first dome 61 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 first dome 61 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 second dome 62 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 second dome 62 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 second domes 62 is one. Providing one large-area second dome 62 can effectively improve the structural strength of the first dome 61, thereby enhancing the rigidity of the vibration system of the sound generating unit.

[0055] Optionally, the first dome 61 and the second dome 62 are respectively of single-layer structure. In an actual product, it is also possible that the first dome 61 or the second dome 62 is of multi-layer stacked structure.

[0056] Embodiment 2

[0057] Please refer to Figure 5 , Embodiment 2 of the present utility model is a parallel technical solution to Embodiment 1. The difference from Embodiment 1 is that the number of the second domes 62 is multiple.

[0058] In this embodiment, two second domes 62 are installed on the first dome 61, and the two second domes 62 are arranged at intervals. In this way, while ensuring that the first dome 61 has sufficient structural strength, the overall weight of the vibration system of the sound generating unit is reduced, so that the sound generating unit has better performance.

[0059] Embodiment 3

[0060] Please refer to Figure 6 , Embodiment 3 of the present utility model is a parallel technical solution to Embodiment 1. The difference from Embodiment 1 is that the first dome 61 and the second dome 62 are respectively of multi-layer stacked structure.

[0061] 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: including a skeleton, the skeleton includes a body, a window is provided in a 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 first dome, the first dome is provided on the body and covers the window; a second dome, the second dome is mounted on the first dome and 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, wherein: The number of the second domes is one or more.

3. The sound generating unit according to claim 1, characterized in that: The first dome and the second dome are adhesively connected.

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

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

6. The sound generating unit according to claim 1, characterized in that: 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 is fixedly connected to the pressing edge.

7. 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 first dome is received in the pressing groove.

8. The sound generating unit according to claim 7, wherein: The top surface of the first dome is lower than or flush with the top surface of the body.

9. The sound generating unit according to claim 1, wherein: It further includes a chassis, a magnetic circuit assembly and a voice coil. The diaphragm further includes an outer fixing portion, and the outer fixing portion is connected to the chassis; the magnetic circuit assembly includes a yoke and a boss, a central magnetic structure and a side magnetic structure respectively provided on the yoke, the side magnetic structure is connected to the chassis, a magnetic gap is formed between the central magnetic structure and the side magnetic structure, the central magnetic structure is integrally in a ring frame shape, the boss is located within a hollow region of the central magnetic structure, a conductive member is provided on the boss, one end of the conductive member is exposed at the bottom surface of the yoke, the voice coil is connected to the body and is arranged corresponding to the magnetic gap, the inner mounting portion is fixed on the boss, and the voice coil is electrically connected to the conductive member through the shaping support piece.

Images