Sound production unit

Abstract

The utility model discloses a sounding unit which comprises a basin stand, a yoke and a magnetic circuit assembly, and the side wall of the basin stand is provided with an air outlet. The magnetic circuit assembly is arranged in the basin stand, the magnetic circuit assembly comprises a central magnetic structure and an edge magnetic structure, and the central magnetic structure is arranged on the yoke; the edge magnetic structure is integrally in a continuous ring frame shape, the edge magnetic structure surrounds the center magnetic structure and is arranged on the yoke, a magnetic gap is formed between the edge magnetic structure and the center magnetic structure, and a vent groove communicated with the air outlet hole and the magnetic gap is formed in the interface of the edge magnetic structure and the yoke. The sound production unit adopts the continuous annular frame-shaped edge magnetic structure, the magnetic field intensity of the sound production unit is effectively improved, the performance of the sound production unit is improved, the vent groove communicated with the air outlet hole in the basin frame is formed in the junction of the edge magnetic structure and the yoke, air at the bottom of the magnetic gap can interact with the external atmosphere, and the sound production efficiency is improved. The smoothness of the interaction between the inner cavity of the sounding unit and the external air flow is ensured, and the performance of the sounding unit is improved to a greater extent.

Description

Technical Field

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

[0002] As an electroacoustic conversion device, a sounding unit is widely used in various portable electronic devices such as mobile phones, tablet computers, and portable game consoles.

[0003] In a traditional loudspeaker, a voice coil drives a diaphragm to generate sound. During the sound generation process, air flows between the outside and the inner cavity of the sounding unit. However, for existing sounding units, in order to improve performance, as many magnetic steels as possible are arranged on the inner and outer sides of the voice coil, and there is even a design where both the inner and outer sides of the voice coil are annular magnetic structures, so that the inner cavity of the sounding unit and the outside cannot smoothly perform air flow interaction. Therefore, how to balance the volume of the magnetic circuit component of the sounding unit and the smoothness of air flow interaction is a problem that practitioners need to solve. Summary of the Utility Model

[0004] The technical problem solved by the utility model is to provide a high-performance sounding unit with smooth air flow interaction.

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

[0006] A chassis, and air outlet holes are provided on the side wall of the chassis;

[0007] A magnetic circuit component, which is arranged in the chassis, and the magnetic circuit component includes

[0008] A yoke;

[0009] A central magnetic structure, which is arranged on the yoke;

[0010] A side magnetic structure, the whole of which is in the shape of a continuous ring frame, the side magnetic structure surrounds the central magnetic structure and is arranged on the yoke, a magnetic gap is formed between the side magnetic structure and the central magnetic structure, and an air vent groove communicating the air outlet holes with the magnetic gap is provided at the interface between the side magnetic structure and the yoke.

[0011] In one embodiment, an air cavity is provided on the outer side of the side magnetic structure, and the air vent groove communicates with the air outlet holes through the air cavity.

[0012] In one embodiment, the air cavity is located at the long side, short side or corner of the side magnetic structure.

[0013] In one embodiment, the air cavity communicates with the top surface of the side magnetic structure.

[0014] In one embodiment, a ventilation mesh is provided on the speaker frame, and the ventilation mesh is disposed at the air outlet to shield the air outlet.

[0015] In one embodiment, the mesh is a woven mesh or a metal mesh.

[0016] In one embodiment, all regions of the ventilation groove are located on the edge magnet structure, or all regions of the ventilation groove are located on the yoke.

[0017] In one embodiment, the ventilation groove includes a first portion disposed on the yoke and a second portion disposed on the edge magnet structure.

[0018] In one embodiment, the first portion and the second portion are disposed opposite to each other.

[0019] The beneficial effects of the present utility model are as follows: The present sounding unit adopts a continuous ring-shaped edge magnet structure, effectively improving the magnetic field strength of the sounding unit, enhancing its performance. Moreover, a ventilation groove communicating with the air outlet on the speaker frame is provided at the junction of the edge magnet structure and the yoke, allowing the air at the bottom of the magnetic gap to interact with the external atmosphere, ensuring the smoothness of the air flow interaction between the inner cavity of the sounding unit and the outside, and facilitating a greater improvement in the performance of the sounding 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 sounding unit according to Embodiment 1 of the present utility model;

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

[0023] Figure 3 is a schematic structural view of a partial structure of the sounding unit according to Embodiment 2 of the present utility model;

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

[0025] Explanation of the reference numerals in the drawings:

[0026] 1. Speaker frame; 11. Air outlet; 12. Mesh;

[0027] 2. Magnetic circuit components; 21. Yoke; 22. Boss; 23. Central magnetic structure; 24. Edge magnetic structure; 241. Edge magnet; 242. Edge washer; 25. Vent groove; 26. Air cavity;

[0028] 3. Skeleton; 31. Body; 311. Pressing edge; 32. Support arm; 321. Stamped rib;

[0029] 4. Voice coil;

[0030] 5. Diaphragm; 51. Inner fixing part; 52. Folded ring part; 53. Outer fixing part;

[0031] 6. Dome;

[0032] 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. Detailed implementation mode

[0033] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described with reference to the embodiments and the accompanying drawings.

[0034] 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 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.

[0035] 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 position relationship and movement conditions between components in a specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, 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.

[0037] In addition, the meaning of "and / or" as used throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes solution, or 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 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 this utility model.

[0038] In this application, unless otherwise clearly specified and defined, terms such as "installed", "connected", "coupled", "fixed", etc. shall 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.

[0039] Embodiment 1

[0040] Please refer to Figure 1 and Figure 2 , Embodiment 1 of this utility model is: a sound generating unit, comprising 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. An air outlet hole 11 is provided on the side wall of the chassis 1. The magnetic circuit assembly 2 is arranged inside the chassis 1. The magnetic circuit assembly 2 includes a yoke 21, 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. The side magnetic structure 24 is integrally in a continuous ring shape. The side magnetic structure 24 is arranged around the central magnetic structure 23. A magnetic gap is formed between the side magnetic structure 24 and the central magnetic structure 23. An air vent groove 25 communicating the air outlet hole 11 with the magnetic gap is provided at the interface between the side magnetic structure 24 and the yoke 21. In this embodiment, the central magnetic structure 23 is integrally in a ring shape. The boss 22 is located in the hollow area of the central magnetic structure 23. A conductive member is provided on the boss 22. One end of the conductive member is exposed at 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 integral structure formed by one-piece processing or a split structure fixedly connected by gluing, hot melting or other means;

[0041] 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 dome 6 is arranged on the body 31 and covers the window to close the window;

[0042] 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 the inside out. The inner fixing portion 51 is in a ring frame shape and is connected to the main body 31. The inner fixing portion 51 surrounds the main body 31 to achieve a sealed connection with the main body 31. The outer fixing portion 53 is connected to the chassis 1;

[0043] 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 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 through the shaping support piece 7.

[0044] Due to the low magnetic utilization rate in the middle region of the central magnetic structure 23, the central magnetic structure 23 is set in a ring frame shape, and a boss 22 for mounting the conductive member and supporting the shaping support piece 7 is provided in the center of the central magnetic structure 23, so that the central space inside the sounding unit is fully utilized. Moreover, there is no need to provide an avoidance structure for avoiding the lead of the voice coil 4 on the edge magnetic structure 24, so that the overall volume of the edge magnetic structure 24 can be set larger, thereby enabling the performance of the sounding unit to be improved to a greater extent.

[0045] At least a part 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 whole sounding 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 main 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 main body 31.

[0046] An air cavity 26 is provided on the outer side of the edge magnetic structure 24. The ventilation groove 25 communicates with the air outlet hole 11 through the air cavity 26. The setting of the air cavity 26 can improve the smoothness of the interaction between the air inside the sounding unit and the external atmosphere.

[0047] In an embodiment, the air cavity 26 is located on the long side or the short side of the edge magnetic structure 24. In this embodiment, the air cavity 26 is located at the corner of the edge magnetic structure 24. Since the magnetic utilization rate in the corner region of the edge magnetic structure 24 is low, arranging the air cavity 26 at the corner of the edge magnetic structure 24 can more greatly reduce the influence of the air cavity 26 on the magnetic field of the sounding unit.

[0048] Optionally, to further improve the smoothness of air flow interaction, the air cavity 26 communicates with the top surface of the edge magnetic structure 24. The edge magnetic structure 24 includes an edge magnet 241 and an edge washer 242. The bottom of the edge magnet 241 is connected to the yoke 21, and the top of the edge magnet 241 is connected to the edge washer 242. The air cavity 26 is provided outside the edge magnet 241. The fact that the air cavity 26 communicates with the top surface of the edge magnetic structure 24 means that the air cavity 26 can communicate with the top surface of the edge washer 242. In an actual product, it is also possible that the air cavity 26 does not communicate with the top surface of the edge washer 242, and it can be specifically selected and set according to needs.

[0049] To prevent foreign objects from entering the inside of the sound generating unit, a breathable mesh cloth 12 is provided on the speaker frame 1. The breathable mesh cloth 12 is provided at the air outlet hole 11 to cover the air outlet hole 11. The mesh cloth 12 is a woven mesh or a metal mesh.

[0050] In one embodiment, all areas of the ventilation groove 25 are located on the edge magnetic structure 24. However, in this embodiment, all areas of the ventilation groove 25 are located on the yoke 21.

[0051] Specifically, the outer mounting portion 73 includes a first plate portion 731, a heightening 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 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 main 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 soldering the lead of the voice coil 4 is provided on the first plate portion 731. A second solder pad 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.

[0052] The skeleton 3 is made of a material with low density, such as aluminum, aluminum-magnesium alloy, magnesium-aluminum alloy and other materials, 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.

[0053] Optionally, to improve the rigidity of the support arm 32 and enable the support arm 32 to play a better supporting role, the support arm 32 is provided with stamping ribs 321.

[0054] To make the overall height of the sound generating unit lower, the outer edge of the main 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 main body 31. Additionally, 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.

[0055] A pressing groove is provided in the central region of the main 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.

[0056] Embodiment 2

[0057] Please refer to Figure 3 and Figure 4 , Embodiment 2 of the present utility model is an alternative technical solution to Embodiment 1. The difference from Embodiment 1 is that the ventilation groove 25 includes a first part provided on the yoke 21 and a second part provided on the edge magnetic structure 24. Specifically, the second part is provided at the bottom of the edge magnetic steel 241.

[0058] In this embodiment, the first part and the second part are arranged opposite to each other. In other embodiments, it is also possible that the first part and the second part are partially misaligned or completely misaligned.

[0059] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. All equivalent structural transformations 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 are included in the patent protection scope of the present utility model.

Claims

1. Sound generating unit, characterized in that: including a basin frame, an air outlet is provided on the side wall of the basin frame; a magnetic circuit assembly, the magnetic circuit assembly is arranged in the basin frame, and the magnetic circuit assembly includes a yoke; a central magnetic structure, the central magnetic structure is arranged on the yoke; a side magnetic structure, the side magnetic structure is integrally in a continuous ring frame shape, the side magnetic structure is arranged around the central magnetic structure on the yoke, a magnetic gap is formed between the side magnetic structure and the central magnetic structure, and an air vent groove communicating the air outlet and the magnetic gap is arranged at the interface between the side magnetic structure and the yoke.

2. The sound generating unit according to claim 1, wherein: An air cavity is arranged outside the side magnetic structure, and the air vent groove communicates with the air outlet through the air cavity.

3. The sound generating unit according to claim 2, characterized in that: The air cavity is located at the long side, short side or corner of the side magnetic structure.

4. The sound generating unit according to claim 2, characterized in that: The air cavity communicates with the top surface of the side magnetic structure.

5. The sound generating unit according to claim 1, characterized in that: A breathable mesh cloth is arranged on the basin frame, and the breathable mesh cloth is arranged at the air outlet to cover the air outlet.

6. The sound generating unit according to claim 5, wherein: The mesh cloth is a woven mesh or a metal mesh.

7. The sound generating unit according to claim 1, wherein: All areas of the air vent groove are located on the side magnetic structure, or all areas of the air vent groove are located on the yoke.

8. The sound generating unit according to claim 1, wherein: The air vent groove includes a first part arranged on the yoke and a second part arranged on the side magnetic structure.

9. The sound generating unit according to claim 8, wherein: The first part and the second part are arranged oppositely.

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