Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a voice coil, a vibrating diaphragm and a framework, the vibrating diaphragm comprises a combination part, an inner fixing part, a deformation part and an outer fixing part, the inner fixing part, the deformation part and the outer fixing part are sequentially connected from inside to outside, the combination part is connected with the inner fixing part, and the combination part is positioned above the voice coil; the framework and the combination part are of an integrated structure formed by integral injection molding, and the bottom surface of the framework is bonded with the voice coil. In the sounding unit, the vibrating diaphragm and the framework are injection-molded into an integrated structure through the combination part, so that the framework and the vibrating diaphragm are integrated, a connection mode of adhering the framework and the vibrating diaphragm is abandoned, the phenomena that the framework is easy to crack or fall off and the like after the sounding unit is used for a long time and a reliability experiment is carried out are improved, and the structural stability of the sounding unit is improved; and at least one surface of the framework is exposed out of the combination part to be bonded with the voice coil, so that the framework has a positioning surface when the framework and the vibrating diaphragm are integrally formed through injection molding, thereby facilitating processing and manufacturing of the vibrating assembly, facilitating improvement of the manufacturing efficiency of the vibrating assembly and reducing the manufacturing cost of the sound production unit.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, in particular to a sound generating unit. Background Art

[0002] As a device that can convert electrical energy into sound energy, the sound unit is now widely used in microelectronic devices such as smart phones, portable cameras, cameras and laptops.

[0003] A sound driver typically consists of a magnetic circuit assembly, a vibration assembly, and a support assembly. The vibration assembly typically includes a diaphragm, dome, voice coil, and bobbin. The bobbin's primary function is to adjust the voice coil's position within the magnetic gap, thereby reducing the air loss associated with traditional structures. It also improves the flatness of the driver's BL curve, further enhancing the symmetry of the vibration assembly and reducing harmonic distortion, effectively improving the overall performance of the driver.

[0004] In the existing technology, the frame and the diaphragm are generally fixed by gluing. However, due to the instability of the gluing process, after long-term use and reliability testing, the frame is very likely to crack or fall off, thereby affecting the life of the sound unit. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide a sound-generating unit whose frame is not easy to crack or fall off.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a sound unit comprising:

[0007] Voice coil;

[0008] a diaphragm, the diaphragm comprising a coupling portion and an inner fixing portion, a deformable portion, and an outer fixing portion sequentially connected from the inside out, the coupling portion being connected to the inner fixing portion, and the coupling portion being located above the voice coil;

[0009] The skeleton and the joint are an integral structure formed by integral injection molding, and the bottom surface of the skeleton is bonded to the voice coil.

[0010] Furthermore, the cross section of the frame is rectangular, the connecting portion includes a top wall and side walls connected to each other, the bottom surface of the top wall is connected to the top surface of the frame, and the side walls are connected to the side surfaces of the frame.

[0011] Furthermore, the connecting portion includes two side walls, and the inner side surface and the outer side surface of the frame are respectively connected to the side walls.

[0012] Furthermore, the frame has a rubber-grabbing through hole connecting the inner side surface and the outer side surface thereof, and a connecting column is formed in the rubber-grabbing through hole, and the connecting column connects the two side walls.

[0013] Furthermore, the bottom surface of the joint is adhesively connected to the voice coil.

[0014] Furthermore, the cross section of the skeleton is L-shaped, and the cross section of the connecting portion is rectangular.

[0015] Furthermore, the cross section of the skeleton is in a convex shape, and the skeleton includes a connected horizontal portion and an upper convex portion, and the upper convex portion is embedded in the connecting portion.

[0016] Furthermore, a gripping structure is provided on the skeleton, and a partial area of the joint is embedded in the gripping structure.

[0017] Furthermore, the rubber grabbing structure is a dovetail groove.

[0018] Furthermore, a window is provided on the inner fixing portion, and the coupling portion is arranged along the edge of the window.

[0019] The beneficial effects of the present invention are as follows: in the sound unit, the diaphragm is injection-molded with the skeleton through the joint to form an integrated structure, so that the skeleton and the diaphragm become one, and the bonding connection method between the skeleton and the diaphragm is abandoned, thereby improving the phenomenon of the skeleton cracking or falling off that is easy to occur after long-term use and reliability testing of the sound unit, and improving the structural stability of the sound unit; at least one side of the skeleton is exposed at the joint to be bonded to the voice coil, so that when the skeleton and the diaphragm are injection-molded into one, the skeleton has a positioning surface, thereby facilitating the processing and manufacturing of the vibration component, which is beneficial to improving the manufacturing efficiency of the vibration component and reducing the manufacturing cost of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of the sound unit of the first embodiment of the present invention;

[0021] Figure 2 for Figure 1 An enlarged view of detail A in FIG;

[0022] Figure 3 A partial cross-sectional view of the sound unit of the second embodiment of the present invention;

[0023] Figure 4 This is a partial cross-sectional view of the sound unit of the third embodiment of the present invention;

[0024] Figure 5 This is a partial cross-sectional view of the sound unit of the fourth embodiment of the present utility model;

[0025] Figure 6 This is a partial cross-sectional view of the sound unit of the fifth embodiment of the present invention.

[0026] Description of labels:

[0027] 1. Basin rack;

[0028] 2. Vibration assembly; 21. Diaphragm; 211. Internal fixing portion; 212. Deformable portion; 213. External fixing portion; 214. Joint; 2141. Top wall; 2142. Side wall; 2143. Connecting column; 22. Voice coil; 23. Dome; 24. Frame; 241. Glue-grabbing hole;

[0029] 3. Magnetic circuit components. DETAILED DESCRIPTION

[0030] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0031] Please refer to Figures 1 to 6 , sound unit, including:

[0032] Voice coil 22;

[0033] The diaphragm 21 includes a coupling portion 214 and an inner fixing portion 211, a deformable portion 212, and an outer fixing portion 213 sequentially connected from the inside to the outside. The coupling portion 214 is connected to the inner fixing portion 211 and is located above the voice coil 22.

[0034] The skeleton 24 and the connecting portion 214 are an integral structure formed by integral injection molding, and the bottom surface of the skeleton 24 is bonded to the voice coil 22 .

[0035] From the above description, it can be seen that the beneficial effects of the present invention are: in the present sound unit, the diaphragm 21 is injection-molded with the skeleton 24 through the joint 214 into an integrated structure, so that the skeleton 24 and the diaphragm 21 become one, and the gluing connection method between the skeleton 24 and the diaphragm 21 is abandoned, thereby improving the phenomenon of cracking or falling of the skeleton 24 that is prone to occur after long-term use and reliability testing of the sound unit, and improving the structural stability of the sound unit; at least one side of the skeleton 24 is exposed at the joint 214 to be bonded to the voice coil 22, so that when the skeleton 24 and the diaphragm 21 are injection-molded into one, the skeleton 24 has a positioning surface, thereby facilitating the processing and manufacturing of the vibration component 2, which is beneficial to improving the manufacturing efficiency of the vibration component 2 and reducing the manufacturing cost of the sound unit.

[0036] Furthermore, the cross section of the skeleton 24 is rectangular, and the coupling portion 214 includes a top wall 2141 and a side wall 2142 connected to each other. The bottom surface of the top wall 2141 is connected to the top surface of the skeleton 24 , and the side wall 2142 is connected to the side surface of the skeleton 24 .

[0037] It can be seen from the above description that the bonding area between the skeleton 24 and the bonding portion 214 is large, which improves the stability of the connection between the diaphragm 21 and the skeleton 24 .

[0038] Furthermore, the connecting portion 214 includes two side walls 2142 , and the inner side surface and the outer side surface of the frame 24 are respectively connected to the side walls 2142 .

[0039] From the above description, it can be seen that the inner and outer sides of the skeleton 24 are solidified by the side walls 2142, which can further reduce the risk of cracking of the skeleton 24. The joint 214 and the skeleton 24 have a larger bonding area, which greatly improves the stability of the connection between the diaphragm 21 and the skeleton 24.

[0040] Furthermore, the frame 24 has a rubber-grabbing through hole 241 communicating with the inner side surface and the outer side surface thereof. A connecting column 2143 is formed in the rubber-grabbing through hole 241 , and the connecting column 2143 connects the two side walls 2142 .

[0041] As can be seen from the above description, the risk of the frame 24 cracking or falling is further reduced.

[0042] Furthermore, the bottom surface of the coupling portion 214 is adhesively connected to the voice coil 22 .

[0043] Furthermore, the cross section of the skeleton 24 is L-shaped, and the cross section of the connecting portion 214 is rectangular.

[0044] Furthermore, the cross section of the skeleton 24 is in a convex shape, and the skeleton 24 includes a connected horizontal portion and an upper convex portion, and the upper convex portion is embedded in the connecting portion 214 .

[0045] As can be seen from the above description, the specific structures of the skeleton 24 are varied, and at least two surfaces of the skeleton 24 are in direct contact with the coupling portion 214 to form a coupling.

[0046] Furthermore, a gripping structure is provided on the skeleton 24 , and a partial area of the coupling portion 214 is embedded in the gripping structure.

[0047] It can be seen from the above description that the provision of the gripping structure can reduce the risk of the skeleton 24 falling to a greater extent.

[0048] Furthermore, the rubber grabbing structure is a dovetail groove.

[0049] From the above description, it can be seen that the dovetail groove has a simple structure, is easy to process, and has a good glue-grabbing effect.

[0050] Furthermore, a window is provided on the inner fixing portion 211 , and the coupling portion 214 is provided along an edge of the window.

[0051] As can be seen from the above description, disposing the connecting portion 214 at the edge of the window can facilitate the forming of the connecting portion 214 .

[0052] Example 1

[0053] Please refer to Figure 1 and Figure 2 , the utility model embodiment 1 is: a sound unit, including a basin 1, a vibration component 2 and a magnetic circuit component 3, the vibration component 2 and the magnetic circuit component 3 are respectively connected to the basin 1, the magnetic circuit component 3 has a magnetic gap, the vibration component 2 includes a diaphragm 21, a voice coil 22, a dome 23 and a skeleton 24, the diaphragm 21 includes a joint 214 and an inner fixing part 211, a deformation part 212 and an outer fixing part 213 connected in sequence from the inside to the outside, the joint 214, the inner fixing part 211, the deformation part 212 and the outer fixing part The outer fixing portion 213 is fixedly connected to the basin frame 1, the dome 23 is arranged on the side of the inner fixing portion 211 away from the magnetic circuit assembly 3, the connecting portion 214 is connected to the inner fixing portion 211, the connecting portion 214 is located above the voice coil 22, and the voice coil 22 is arranged corresponding to the magnetic gap; the skeleton 24 and the connecting portion 214 are an integral structure of integral injection molding, and the bottom surface of the skeleton 24 is bonded to the voice coil 22.

[0054] The diaphragm 21 can be made of rubber, TPE, or the like. In this embodiment, the diaphragm 21 is made of silicone. The frame 24 can be made of metal or non-metal, such as plastic. Preferably, the frame 24 is made of a material with low density and high hardness. This reduces the overall weight of the vibration assembly 2 and thus minimizes the impact on the performance of the sound unit. In this embodiment, the frame 24 is made of aluminum alloy.

[0055] Preferably, there are multiple bonding surfaces between the diaphragm 21 and the skeleton 24, which can effectively increase the bonding area between the diaphragm 21 and the skeleton 24, thereby improving the bonding force between the two and further enhancing the fixing effect of the two.

[0056] In this embodiment, the cross-section of the skeleton 24 is rectangular, and the connecting portion 214 includes a top wall 2141 and a side wall 2142 connected to each other. The bottom surface of the top wall 2141 is connected to the top surface of the skeleton 24, and the side wall 2142 is connected to the side surface of the skeleton 24.

[0057] To improve the fixing effect of the voice coil 22 and reduce the risk of the voice coil 22 falling, optionally, the bottom surface of the joint 214 is glued to the voice coil 22. In this embodiment, the bottom surface of the side wall 2142 is glued to the voice coil 22.

[0058] As a preferred embodiment, the frame 24 is provided with a gripping structure, and a portion of the joint 214 is embedded in the gripping structure. This can greatly enhance the bonding strength between the frame 24 and the diaphragm 21 and reduce the risk of separation between the two. The gripping structure is simply a dovetail groove, but other gripping structures are also acceptable, such as blind holes, tapered holes, etc.

[0059] A window is provided on the inner fixing portion 211 , and the spherical top 23 covers and closes the window, thereby reducing the overall weight of the vibration assembly 2 to a greater extent, thereby improving the performance of the sound unit.

[0060] To facilitate injection molding, the coupling portion 214 is preferably provided along the edge of the window.

[0061] Example 2

[0062] Please refer to Figure 3 The second embodiment of the present invention is a further improvement made on the basis of the first embodiment. The difference from the first embodiment is that: in the first embodiment, the joint 214 has only one side wall 2142, while in the present embodiment, the joint 214 includes two side walls 2142. At this time, the inner side and the outer side of the skeleton 24 are respectively connected to the side walls 2142.

[0063] Example 3

[0064] Please refer to Figure 4 The third embodiment of the present invention is a further improvement made on the basis of the second embodiment, and is different from the second embodiment in that: the skeleton 24 has a rubber-grabbing through hole 241 connecting its inner side surface and outer side surface, and a connecting column 2143 is formed in the rubber-grabbing through hole 241. The connecting column 2143 connects the two side walls 2142 of the joint 214, that is, the connecting column 2143 connects the side wall 2142 located on the inner side of the skeleton 24 and the side wall 2142 located on the outer side of the skeleton 24.

[0065] Strictly speaking, the connecting column 2143 is a partial area of the joint 214 . During the injection molding process, the injection liquid flows into the glue grabbing through hole 241 , and after solidification, the connecting column 2143 connecting the two side walls 2142 is formed.

[0066] Such a structure can greatly improve the stability of the connection between the skeleton 24 and the diaphragm 21 and reduce the risk of the skeleton 24 falling. At the same time, the joint 214 can effectively restrain the skeleton 24 and reduce the risk of the skeleton 24 cracking.

[0067] Example 4

[0068] Please refer to Figure 5The fourth embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that the cross section of the skeleton 24 is L-shaped, and the cross section of the joint 214 is rectangular.

[0069] Example 5

[0070] Please refer to Figure 6 The fifth embodiment of the present invention is a parallel technical solution of the first embodiment, and is different from the first embodiment in that the cross-section of the skeleton 24 is convex-shaped, and the skeleton 24 includes a connected horizontal portion and an upper convex portion, and the upper convex portion is embedded in the joint 214.

[0071] To sum up, in the sound unit provided by the present invention, the diaphragm is injection-molded with the skeleton through the joint to form an integrated structure, so that the skeleton and the diaphragm become one, and the gluing connection method between the skeleton and the diaphragm is abandoned, thereby improving the phenomenon of skeleton cracking or falling off that is easy to occur after long-term use and reliability testing of the sound unit, and improving the structural stability of the sound unit; at least one side of the skeleton is exposed at the joint to be bonded to the voice coil, so that when the skeleton and the diaphragm are injection-molded into one, the skeleton has a positioning surface, thereby facilitating the processing and manufacturing of the vibration component, which is beneficial to improving the manufacturing efficiency of the vibration component and reducing the manufacturing cost of the sound unit.

[0072] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A sound unit, characterized in that: include Voice coil; a diaphragm, the diaphragm comprising a coupling portion and an inner fixing portion, a deformable portion, and an outer fixing portion sequentially connected from the inside out, the coupling portion being connected to the inner fixing portion, and the coupling portion being located above the voice coil; The skeleton and the joint are an integral structure formed by integral injection molding, and the bottom surface of the skeleton is bonded to the voice coil.

2. The sound unit according to claim 1, characterized in that The cross section of the frame is rectangular, and the connecting portion includes a top wall and side walls connected to each other. The bottom surface of the top wall is connected to the top surface of the frame, and the side walls are connected to the side surfaces of the frame.

3. The sound unit according to claim 2, characterized in that The connecting portion includes two side walls, and the inner side surface and the outer side surface of the frame are respectively connected to the side walls.

4. The sound unit according to claim 3, characterized in that The frame has a rubber-grabbing through hole communicating with the inner side surface and the outer side surface thereof. A connecting column is formed in the rubber-grabbing through hole, and the connecting column connects the two side walls.

5. The sound unit according to claim 1, characterized in that: The bottom surface of the joint portion is adhesively connected to the voice coil.

6. The sound unit according to claim 1, characterized in that The cross section of the skeleton is L-shaped, and the cross section of the connecting portion is rectangular.

7. The sound unit according to claim 1, characterized in that The cross section of the frame is in a convex shape, and the frame comprises a connected horizontal portion and an upper convex portion, and the upper convex portion is embedded in the connecting portion.

8. The sound unit according to claim 1, characterized in that The frame is provided with a gripping structure, and a partial area of the joint portion is embedded in the gripping structure.

9. The sound unit according to claim 8, characterized in that: The rubber grabbing structure is a dovetail groove.

10. The sound unit according to claim 1, characterized in that: The inner fixing portion is provided with a window, and the coupling portion is arranged along the edge of the window.

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