Sound unit

Abstract

This utility model discloses a sound-generating unit, including a diaphragm assembly, a frame, a voice coil, and a centering support. The frame includes a housing connecting the diaphragm assembly, and the housing has a connecting arm extending away from the diaphragm assembly. The bottom end of the connecting arm has an outwardly extending extension arm. The connecting arm connects to the inner peripheral wall of the voice coil, and the bottom surface of the voice coil connects to the extension arm. The centering support includes an inner mounting part, a deformation part, and an outer mounting part connected sequentially from the inside to the outside. The bottom surface of the inner mounting part connects to the extension arm. This sound-generating unit effectively improves the connection stability between the voice coil and the frame, reducing the risk of the voice coil falling off. Simultaneously, the inner mounting part of the centering support is directly bonded to the bottom surface of the extension arm, rather than the outer wall or bottom surface of the voice coil in traditional structures. This avoids the limitation of the bonding area caused by the thickness of the voice coil itself, further enhancing the connection reliability between the centering support and the vibration system. Thus, while increasing the amplitude, it significantly improves the structural stability of the large-amplitude sound-generating unit.

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] As a commonly used electroacoustic transducer that converts electrical energy into sound energy, the sound-generating unit plays an indispensable role in the sound amplifier system.

[0003] With the development of consumer electronics products such as mobile phones, tablets, and AR / VR wearable devices, higher demands are being placed on the performance of sound-generating units. To increase the amplitude and improve the performance of sound-generating units, some units indirectly connect the diaphragm assembly and voice coil via a frame. The frame allows the voice coil to extend more into the magnetic gap of this assembly. However, since the bonding width between the frame and the voice coil depends on the voice coil thickness, which is generally not very thick, the bonding area available for the frame is limited. This leads to unstable bonding between the frame and the voice coil, posing a risk of the voice coil falling off during operation. Furthermore, in some units, the centering support plate used for correcting the voice coil is typically bonded to the outer wall or bottom surface of the voice coil. The bonding area available for the centering support plate is also limited, sometimes causing the centering support plate to separate from the voice coil during operation. In summary, existing large-amplitude sound-generating units suffer from unsatisfactory structural stability. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a sound generating unit with a stable connection between the voice coil, the frame, and the centering support.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a sound-generating unit, comprising: Diaphragm assembly; The frame includes a frame for connecting the diaphragm assembly, the frame having a connecting arm extending away from the diaphragm assembly, and the bottom end of the connecting arm having an outwardly extending extension arm. The voice coil has an extension arm that connects to the inner circumferential wall of the voice coil, and the bottom surface of the voice coil connects to the extension arm. The centering support includes an inner mounting part, a deformation part, and an outer mounting part connected sequentially from the inside to the outside. The bottom surface of the inner mounting part is connected to the extension arm.

[0006] Furthermore, the frame is a rectangular frame, and the connecting arms are connected to the four corners of the frame, or the connecting arms are connected to the sides of the frame.

[0007] Furthermore, the connection point between the connecting arm and the frame is located at the inner or outer edge of the frame.

[0008] Furthermore, stress relief grooves are provided on both sides of the connection between the frame and the connecting arm.

[0009] Furthermore, the skeleton is a one-piece structure that has been integrally machined.

[0010] Furthermore, the entire bottom surface of the inner mounting portion is connected to the extension arm.

[0011] Furthermore, the inner wall surface of the inner mounting part is bonded to the outer wall surface of the connecting arm.

[0012] Furthermore, it also includes a magnetic circuit assembly, which includes a yoke and a central magnetic assembly and a side magnetic assembly disposed on the yoke. A magnetic gap for the voice coil to move is formed between the central magnetic assembly and the side magnetic assembly. The yoke is provided with a first clearance groove for avoiding the extension arm.

[0013] Furthermore, the top surface of the central magnetic component is provided with a second clearance groove for avoiding the frame.

[0014] Furthermore, the top surface of the inner mounting part is provided with an inner solder pad, and the bottom surface of the outer mounting part is provided with an outer solder pad that is in communication with the inner solder pad.

[0015] The beneficial effects of this utility model are as follows: By designing the frame of this sound-generating unit with a connecting arm and an extension arm, the inner peripheral wall of the voice coil is connected to the connecting arm, and the bottom surface is connected to the extension arm, forming a two-way support, which significantly expands the bonding area between the voice coil and the frame, effectively improves the connection stability between the voice coil and the frame, and reduces the risk of the voice coil falling off. At the same time, the inner mounting part of the centering support is directly bonded to the bottom surface of the extension arm, rather than the outer wall or bottom surface of the voice coil in the traditional structure, avoiding the limitation of the bonding area by the thickness of the voice coil itself, further enhancing the connection reliability between the centering support and the vibration system. Thus, while increasing the amplitude, the structural stability of the large amplitude sound-generating unit is significantly improved, solving the problem of weak connection caused by the limited bonding area in the prior art. Attached Figure Description

[0016] Figure 1 This is a top view of the sound-generating unit in Embodiment 1; Figure 2 For along Figure 1 Sectional view of line AA in the middle; Figure 3 This is a schematic diagram of the internal structure of the sound-generating unit in Embodiment 1; Figure 4 This is a schematic diagram of a portion of the structure of the sound-generating unit in Embodiment 1; Figure 5 This is a schematic diagram of the skeleton structure in the sound-generating unit of Embodiment 1.

[0017] Label Explanation: 1. Pot stand; 2. Magnetic circuit assembly; 21. Yoke; 211. First clearance slot; 22. Central magnetic assembly; 221. Second clearance slot; 23. Side magnetic assembly; 3. Diaphragm assembly; 31. Dome; 32. Diaphragm; 4. Frame; 41. Body; 42. Connecting arm; 43. Extension arm; 44. Pressure relief groove; 5. Voice coil; 6. Centering support; 61. Inner mounting part; 611. Inner welding pad; 62. Deformation part; 63. Outer mounting part. Detailed Implementation

[0018] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0019] Please refer to Figures 1 to 4 The sound-generating unit includes a diaphragm assembly 3, a frame 4, a voice coil 5, and a centering support 6. The frame 4 includes a frame 41 that connects to the diaphragm assembly 3. The frame 41 has a connecting arm 42 that extends away from the diaphragm assembly 3. The bottom end of the connecting arm 42 has an extension arm 43 that extends outward. The connecting arm 42 connects to the inner peripheral wall of the voice coil 5, and the bottom surface of the voice coil 5 connects to the extension arm 43. The centering support 6 includes an inner mounting part 61, a deformation part 62, and an outer mounting part 63 that are connected sequentially from the inside to the outside. The bottom surface of the inner mounting part 61 connects to the extension arm 43.

[0020] As can be seen from the above description, the beneficial effects of this utility model are as follows: By designing the frame 4 with a connecting arm 42 and an extension arm 43, the inner peripheral wall of the voice coil 5 is connected to the connecting arm 42 and the bottom surface is connected to the extension arm 43, forming a bidirectional support, which significantly expands the bonding area between the voice coil 5 and the frame 4, effectively improves the connection stability between the voice coil 5 and the frame 4, and reduces the risk of the voice coil falling off. At the same time, the inner mounting part 61 of the centering support 6 is directly bonded to the bottom surface of the extension arm 43, rather than the outer wall or bottom surface of the voice coil 5 in the traditional structure, avoiding the limitation of the bonding area by the thickness of the voice coil 5 itself, further enhancing the connection reliability between the centering support 6 and the vibration system, thereby significantly improving the structural stability of the large amplitude sound unit while increasing the amplitude, and solving the problem of weak connection caused by the limited bonding area in the prior art.

[0021] Please refer to Figure 5 Furthermore, the frame 41 is a rectangular frame, and the four corners of the frame 41 are respectively connected to the connecting arms 42, or the sides of the frame 41 are connected to the connecting arms 42.

[0022] As described above, when the connecting arm 42 is located at the four corners of the rectangular frame, it can provide synchronous support for the four corners of the voice coil 5, and evenly suppress the sway in the long axis and short axis directions of the voice coil 5; when the connecting arm 42 is located on the side of the frame 41, it provides continuous support along the edge, increasing the bonding length in the long side direction; both arrangements can make full use of the straight section or corner area of ​​the rectangular voice coil 5, further enlarging the effective bonding area, making the stress distribution more uniform under large amplitude, and reducing the risk of local delamination.

[0023] Please refer to Figure 5 Furthermore, the connection point between the connecting arm 42 and the frame 41 is located at the inner edge or outer edge of the frame 41.

[0024] As can be seen from the above description, both connection positions maintain the supporting function of the extension arm 43 on the bottom surface of the voice coil 5, making the molding process of the frame 4 and the overall stacking height of the unit more flexible.

[0025] Please refer to Figure 5 Furthermore, stress relief grooves 44 are provided on both sides of the connection between the frame 41 and the connecting arm 42.

[0026] As can be seen from the above description, the stress relief groove 44 can avoid stress concentration at the rigid inflection point, which is conducive to extending the life of the frame 4 itself.

[0027] Please refer to Figure 5 Furthermore, the skeleton 4 is an integral structure that is machined in one piece.

[0028] As can be seen from the above description, the frame 4 is made by one-piece stamping or injection molding. The connecting arm 42, the extension arm 43 and the frame 41 have no subsequent riveting or welding process, which avoids the accumulation of tolerances and the risk of loosening caused by segmented connection. The overall strength is higher, while reducing the number of parts and assembly stations, which is conducive to the thinning of the sound unit and the automated production.

[0029] Please refer to Figure 2 and Figure 4 Furthermore, the entire area of ​​the bottom surface of the inner mounting portion 61 is connected to the extension arm 43.

[0030] As described above, the bottom surface of the inner mounting part 61 is fully attached to the extension arm 43, so that the centering support 6 and the frame 4 form the largest area for applying glue. The glue layer is evenly distributed and the shear force is dispersed, which completely eliminates the edge lifting defect of traditional "gluing", significantly reduces the probability of peeling off the centering support 6, and ensures that the voice coil 5 always reciprocates smoothly along the axial direction under large amplitude and long stroke.

[0031] Please refer to Figures 3 to 4 Furthermore, the inner wall surface of the inner mounting part 61 is bonded to the outer wall surface of the connecting arm 42.

[0032] As described above, the inner wall of the inner mounting part 61 is bonded to the outer wall of the connecting arm 42 to form a double bonding path of "bottom surface + side surface". This constrains the centering support 6 and the frame 4 in both the radial and circumferential directions. Even under the impact of a drop or a sudden large displacement, it can prevent the inner mounting part 61 of the centering support 6 from sliding relative to the frame 4, further improving the impact resistance of the system.

[0033] Please refer to Figure 2 Furthermore, it also includes a magnetic circuit assembly 2, which includes a yoke 21 and a central magnetic assembly 22 and a side magnetic assembly 23 disposed on the yoke 21. A magnetic gap for the voice coil 5 to move is formed between the central magnetic assembly 22 and the side magnetic assembly 23. The yoke 21 is provided with a first clearance groove 211 for avoiding the extension arm 43.

[0034] As can be seen from the above description, the first clearance groove 211 can prevent the extension arm 43 from colliding with the yoke 21.

[0035] Please refer to Figures 2 to 3 Furthermore, the top surface of the central magnetic component 22 is provided with a second clearance groove 221 for avoiding the frame 41.

[0036] As can be seen from the above description, the second clearance groove 221 can prevent the frame 41 from colliding with the central magnetic component 22.

[0037] Please refer to Figure 4 Furthermore, the top surface of the inner mounting part 61 is provided with an inner solder pad 611, and the bottom surface of the outer mounting part 63 is provided with an outer solder pad that is in communication with the inner solder pad 611.

[0038] As described above, the voice coil 5 lead can be directly soldered to the inner pad 611, while the external power amplifier is soldered to the outer pad. There is no need for additional leads to cross the deformation part 62, which avoids the risk of wire breakage caused by the large swing of the lead with the diaphragm. At the same time, it simplifies the wiring, improves assembly efficiency and electrical reliability.

[0039] Embodiment 1 of this utility model is as follows: Please refer to Figures 1 to 4The sound-generating unit includes a frame 1, a magnetic circuit assembly 2, a diaphragm assembly 3, a frame 4, a voice coil 5, and a centering support 6. The diaphragm assembly 3 and the magnetic circuit assembly 2 are respectively connected to the frame 1. Optionally, the diaphragm assembly 3 includes a dome 31 and a diaphragm 32 connected together. The frame 4 includes a frame 41 connecting the diaphragm assembly 3. The frame 41 has a connecting arm 42 extending away from the diaphragm assembly 3. The bottom end of the connecting arm 42 has an extension arm 43 extending outward. In some embodiments, the connecting arm 42 and the extension arm 43 form an L-shaped structure. The connecting arm 42 is connected to the inner peripheral wall of the voice coil 5, and the bottom surface of the voice coil 5 is connected to the extension arm 43. The centering support 6 includes an inner mounting part 61, a deformation part 62, and an outer mounting part 63 connected sequentially from the inside to the outside. The bottom surface of the inner mounting part 61 is connected to the extension arm 43, and the outer mounting part 63 is connected to the frame 1. In this embodiment, the frame 41 is in contact with and bonded to the dome 31.

[0040] Please refer to Figures 2 to 3 The magnetic circuit assembly 2 includes a yoke 21 and a central magnetic assembly 22 and a side magnetic assembly 23 disposed on the yoke 21. A magnetic gap is formed between the central magnetic assembly 22 and the side magnetic assembly 23 to allow the voice coil 5 to move. The central magnetic assembly 22 includes a central magnet and a central washer located above the central magnet. The central magnet is bonded to the central washer and the yoke 21 respectively. The side magnetic assembly 23 includes a side magnet and a side washer located above the side magnet. The side washer is connected to the frame 1. The yoke 21 is provided with a first clearance groove 211 for avoiding the extension arm 43.

[0041] Please refer to Figure 5 In this embodiment, the frame 41 is a rectangular frame, and the four corners of the frame 41 are respectively connected to the connecting arms 42. In other embodiments, the connecting arms 42 can also be connected to the side of the frame 41.

[0042] Please refer to Figures 4 to 5 In this embodiment, the connection point between the connecting arm 42 and the frame 41 is located at the outer edge of the frame 41. This structure facilitates the processing and manufacturing of the skeleton 4. Please refer to... Figures 2 to 3 The top surface of the central magnetic assembly 22 is provided with a second clearance groove 221 for avoiding the frame 41. Specifically, the second clearance groove 221 is located at the top edge of the central washer. In other embodiments, the connection between the connecting arm 42 and the frame 41 is located at the inner edge of the frame 41. In this case, the frame 41 is located above the voice coil 5, and the central magnetic circuit assembly 2 does not need to be provided with a second clearance groove 221, thereby improving the B value of the sound-generating unit.

[0043] Please refer to Figure 5Preferably, the frame 4 is a one-piece structure integrally formed. Optionally, stress relief grooves 44 are provided on both sides of the connection between the frame 41 and the connecting arm 42.

[0044] Please refer to Figure 2 and Figure 4 To maximize the bonding strength between the inner mounting part 61 and the extension arm 43, the entire bottom surface of the inner mounting part 61 is connected to the extension arm 43. Specifically, the bottom surface of the inner mounting part 61 is bonded and fixed to the extension arm 43.

[0045] Please refer to Figures 3 to 4 In one or more embodiments, the inner wall surface of the inner mounting portion 61 is bonded to the outer wall surface of the connecting arm 42.

[0046] Please refer to Figure 4 In some embodiments, the top surface of the inner mounting part 61 is provided with an inner solder pad 611, and the voice coil 5 is soldered to the inner solder pad 611 for conduction. The bottom surface of the outer mounting part 63 is provided with an outer solder pad that is in conduction with the inner solder pad 611. An external power supply supplies power to the voice coil 5 through a centering support 6.

[0047] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A sound-generating unit, characterized in that, include Diaphragm assembly; The frame includes a frame for connecting the diaphragm assembly, the frame having a connecting arm extending away from the diaphragm assembly, and the bottom end of the connecting arm having an outwardly extending extension arm. The voice coil has an extension arm that connects to the inner circumferential wall of the voice coil, and the bottom surface of the voice coil connects to the extension arm. The centering support includes an inner mounting part, a deformation part, and an outer mounting part connected sequentially from the inside to the outside. The bottom surface of the inner mounting part is connected to the extension arm.

2. The sound-generating unit according to claim 1, characterized in that, The frame is a rectangular frame, and the connecting arms are connected to the four corners of the frame, or the connecting arms are connected to the sides of the frame.

3. The sound-generating unit according to claim 1, characterized in that, The connection point between the connecting arm and the frame is located at the inner or outer edge of the frame.

4. The sound-generating unit according to claim 3, characterized in that, The frame and the connecting arm are respectively provided with stress relief grooves on both sides of the connection.

5. The sound-generating unit according to claim 1, characterized in that, The skeleton is a one-piece structure that has been machined and formed in one piece.

6. The sound-generating unit according to claim 1, characterized in that, The entire area of ​​the bottom surface of the inner mounting part is connected to the extension arm.

7. The sound-generating unit according to claim 1, characterized in that, The inner wall surface of the internal mounting part is bonded to the outer wall surface of the connecting arm.

8. The sound-generating unit according to claim 1, characterized in that, It also includes a magnetic circuit assembly, which includes a yoke and a central magnetic assembly and a side magnetic assembly disposed on the yoke. A magnetic gap for the voice coil to move is formed between the central magnetic assembly and the side magnetic assembly. The yoke is provided with a first clearance groove for avoiding the extension arm.

9. The sound-generating unit according to claim 8, characterized in that, The top surface of the central magnetic component is provided with a second clearance groove for avoiding the frame.

10. The sound-generating unit according to claim 1, characterized in that, The top surface of the inner mounting part is provided with an inner solder pad, and the bottom surface of the outer mounting part is provided with an outer solder pad that is in communication with the inner solder pad.

Images